object access API
=================
-Talk about <sha1_file.c> and <object.h> family, things like
+Talk about <sha1-file.c> and <object.h> family, things like
* read_sha1_file()
* read_object_with_reference()
LIB_OBJS += ewah/ewah_bitmap.o
LIB_OBJS += ewah/ewah_io.o
LIB_OBJS += ewah/ewah_rlw.o
-LIB_OBJS += exec_cmd.o
+LIB_OBJS += exec-cmd.o
LIB_OBJS += fetch-object.o
LIB_OBJS += fetch-pack.o
LIB_OBJS += fsck.o
LIB_OBJS += refs/ref-cache.o
LIB_OBJS += ref-filter.o
LIB_OBJS += remote.o
-LIB_OBJS += replace_object.o
+LIB_OBJS += replace-object.o
LIB_OBJS += repository.o
LIB_OBJS += rerere.o
LIB_OBJS += resolve-undo.o
LIB_OBJS += setup.o
LIB_OBJS += sha1-array.o
LIB_OBJS += sha1-lookup.o
-LIB_OBJS += sha1_file.o
-LIB_OBJS += sha1_name.o
+LIB_OBJS += sha1-file.o
+LIB_OBJS += sha1-name.o
LIB_OBJS += shallow.o
LIB_OBJS += sideband.o
LIB_OBJS += sigchain.o
LIB_OBJS += wildmatch.o
LIB_OBJS += worktree.o
LIB_OBJS += wrapper.o
-LIB_OBJS += write_or_die.o
+LIB_OBJS += write-or-die.o
LIB_OBJS += ws.o
LIB_OBJS += wt-status.o
LIB_OBJS += xdiff-interface.o
$(OBJECTS): $(LIB_H)
endif
-exec_cmd.sp exec_cmd.s exec_cmd.o: GIT-PREFIX
-exec_cmd.sp exec_cmd.s exec_cmd.o: EXTRA_CPPFLAGS = \
+exec-cmd.sp exec-cmd.s exec-cmd.o: GIT-PREFIX
+exec-cmd.sp exec-cmd.s exec-cmd.o: EXTRA_CPPFLAGS = \
'-DGIT_EXEC_PATH="$(gitexecdir_SQ)"' \
'-DBINDIR="$(bindir_relative_SQ)"' \
'-DPREFIX="$(prefix_SQ)"'
#define NO_THE_INDEX_COMPATIBILITY_MACROS
#include "cache.h"
#include "config.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
#include "attr.h"
#include "dir.h"
#include "utf8.h"
#include "lockfile.h"
#include "dir.h"
#include "pathspec.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
#include "cache-tree.h"
#include "run-command.h"
#include "parse-options.h"
#include "cache.h"
#include "config.h"
#include "builtin.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
#include "parse-options.h"
#include "dir.h"
#include "run-command.h"
#include "blob.h"
#include "refs.h"
#include "builtin.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
#include "parse-options.h"
#include "revision.h"
#include "diff.h"
#include "config.h"
#include "builtin.h"
#include "run-command.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
#include "parse-options.h"
#include "argv-array.h"
#include "strbuf.h"
#include "blob.h"
#include "quote.h"
#include "parse-options.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
/*
* This is to create corrupt objects for debugging and as such it
#include "cache.h"
#include "config.h"
#include "builtin.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
#include "parse-options.h"
#include "run-command.h"
#include "column.h"
#include "tree.h"
#include "progress.h"
#include "fsck.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
#include "streaming.h"
#include "thread-utils.h"
#include "packfile.h"
/*
* Get rid of the idx file as we do not need it anymore.
* NEEDSWORK: extract this bit from free_pack_by_name() in
- * sha1_file.c, perhaps? It shouldn't matter very much as we
+ * sha1-file.c, perhaps? It shouldn't matter very much as we
* know we haven't installed this pack (hence we never have
* read anything from it).
*/
#include "config.h"
#include "refs.h"
#include "builtin.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
#include "parse-options.h"
#ifndef DEFAULT_GIT_TEMPLATE_DIR
#include "tree-walk.h"
#include "xdiff-interface.h"
#include "blob.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
#include "merge-blobs.h"
static const char merge_tree_usage[] = "git merge-tree <base-tree> <branch1> <branch2>";
#include "blob.h"
#include "pretty.h"
#include "refs.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
#include "run-command.h"
#include "parse-options.h"
#include "string-list.h"
#include "config.h"
#include "builtin.h"
#include "parse-options.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
#include "run-command.h"
#include "sha1-array.h"
#include "remote.h"
#include "pkt-line.h"
#include "sideband.h"
#include "run-command.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
#include "commit.h"
#include "object.h"
#include "remote.h"
#include "cache.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
#include "attr.h"
/*
#include "config.h"
#include "repository.h"
#include "lockfile.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
#include "strbuf.h"
#include "quote.h"
#include "hashmap.h"
TL;DR: Run update_unicode.sh after the publication of a new Unicode
-standard and commit the resulting unicode_widths.h file.
+standard and commit the resulting unicode-widths.h file.
The long version
================
-The Git source code ships the file unicode_widths.h which contains
+The Git source code ships the file unicode-widths.h which contains
tables of zero and double width Unicode code points, respectively.
These tables are generated using update_unicode.sh in this directory.
update_unicode.sh itself uses a third-party tool, uniset, to query two
On each run, update_unicode.sh checks whether more recent Unicode data
files are available from the Unicode consortium, and rebuilds the header
-unicode_widths.h with the new data. The new header can then be
+unicode-widths.h with the new data. The new header can then be
committed.
#Cf Format a format control character
#
cd "$(dirname "$0")"
-UNICODEWIDTH_H=$(git rev-parse --show-toplevel)/unicode_width.h
+UNICODEWIDTH_H=$(git rev-parse --show-toplevel)/unicode-width.h
wget -N http://www.unicode.org/Public/UCD/latest/ucd/UnicodeData.txt \
http://www.unicode.org/Public/UCD/latest/ucd/EastAsianWidth.txt &&
--- /dev/null
+#include "cache.h"
+#include "exec-cmd.h"
+#include "quote.h"
+#include "argv-array.h"
+#define MAX_ARGS 32
+
+static const char *argv_exec_path;
+
+#ifdef RUNTIME_PREFIX
+static const char *argv0_path;
+
+static const char *system_prefix(void)
+{
+ static const char *prefix;
+
+ assert(argv0_path);
+ assert(is_absolute_path(argv0_path));
+
+ if (!prefix &&
+ !(prefix = strip_path_suffix(argv0_path, GIT_EXEC_PATH)) &&
+ !(prefix = strip_path_suffix(argv0_path, BINDIR)) &&
+ !(prefix = strip_path_suffix(argv0_path, "git"))) {
+ prefix = PREFIX;
+ trace_printf("RUNTIME_PREFIX requested, "
+ "but prefix computation failed. "
+ "Using static fallback '%s'.\n", prefix);
+ }
+ return prefix;
+}
+
+void git_extract_argv0_path(const char *argv0)
+{
+ const char *slash;
+
+ if (!argv0 || !*argv0)
+ return;
+
+ slash = find_last_dir_sep(argv0);
+
+ if (slash)
+ argv0_path = xstrndup(argv0, slash - argv0);
+}
+
+#else
+
+static const char *system_prefix(void)
+{
+ return PREFIX;
+}
+
+void git_extract_argv0_path(const char *argv0)
+{
+}
+
+#endif /* RUNTIME_PREFIX */
+
+char *system_path(const char *path)
+{
+ struct strbuf d = STRBUF_INIT;
+
+ if (is_absolute_path(path))
+ return xstrdup(path);
+
+ strbuf_addf(&d, "%s/%s", system_prefix(), path);
+ return strbuf_detach(&d, NULL);
+}
+
+void git_set_argv_exec_path(const char *exec_path)
+{
+ argv_exec_path = exec_path;
+ /*
+ * Propagate this setting to external programs.
+ */
+ setenv(EXEC_PATH_ENVIRONMENT, exec_path, 1);
+}
+
+
+/* Returns the highest-priority, location to look for git programs. */
+const char *git_exec_path(void)
+{
+ static char *cached_exec_path;
+
+ if (argv_exec_path)
+ return argv_exec_path;
+
+ if (!cached_exec_path) {
+ const char *env = getenv(EXEC_PATH_ENVIRONMENT);
+ if (env && *env)
+ cached_exec_path = xstrdup(env);
+ else
+ cached_exec_path = system_path(GIT_EXEC_PATH);
+ }
+ return cached_exec_path;
+}
+
+static void add_path(struct strbuf *out, const char *path)
+{
+ if (path && *path) {
+ strbuf_add_absolute_path(out, path);
+ strbuf_addch(out, PATH_SEP);
+ }
+}
+
+void setup_path(void)
+{
+ const char *old_path = getenv("PATH");
+ struct strbuf new_path = STRBUF_INIT;
+
+ add_path(&new_path, git_exec_path());
+
+ if (old_path)
+ strbuf_addstr(&new_path, old_path);
+ else
+ strbuf_addstr(&new_path, _PATH_DEFPATH);
+
+ setenv("PATH", new_path.buf, 1);
+
+ strbuf_release(&new_path);
+}
+
+const char **prepare_git_cmd(struct argv_array *out, const char **argv)
+{
+ argv_array_push(out, "git");
+ argv_array_pushv(out, argv);
+ return out->argv;
+}
+
+int execv_git_cmd(const char **argv) {
+ struct argv_array nargv = ARGV_ARRAY_INIT;
+
+ prepare_git_cmd(&nargv, argv);
+ trace_argv_printf(nargv.argv, "trace: exec:");
+
+ /* execvp() can only ever return if it fails */
+ sane_execvp("git", (char **)nargv.argv);
+
+ trace_printf("trace: exec failed: %s\n", strerror(errno));
+
+ argv_array_clear(&nargv);
+ return -1;
+}
+
+
+int execl_git_cmd(const char *cmd,...)
+{
+ int argc;
+ const char *argv[MAX_ARGS + 1];
+ const char *arg;
+ va_list param;
+
+ va_start(param, cmd);
+ argv[0] = cmd;
+ argc = 1;
+ while (argc < MAX_ARGS) {
+ arg = argv[argc++] = va_arg(param, char *);
+ if (!arg)
+ break;
+ }
+ va_end(param);
+ if (MAX_ARGS <= argc)
+ return error("too many args to run %s", cmd);
+
+ argv[argc] = NULL;
+ return execv_git_cmd(argv);
+}
--- /dev/null
+#ifndef GIT_EXEC_CMD_H
+#define GIT_EXEC_CMD_H
+
+struct argv_array;
+
+extern void git_set_argv_exec_path(const char *exec_path);
+extern void git_extract_argv0_path(const char *path);
+extern const char *git_exec_path(void);
+extern void setup_path(void);
+extern const char **prepare_git_cmd(struct argv_array *out, const char **argv);
+extern int execv_git_cmd(const char **argv); /* NULL terminated */
+LAST_ARG_MUST_BE_NULL
+extern int execl_git_cmd(const char *cmd, ...);
+extern char *system_path(const char *path);
+
+#endif /* GIT_EXEC_CMD_H */
+++ /dev/null
-#include "cache.h"
-#include "exec_cmd.h"
-#include "quote.h"
-#include "argv-array.h"
-#define MAX_ARGS 32
-
-static const char *argv_exec_path;
-
-#ifdef RUNTIME_PREFIX
-static const char *argv0_path;
-
-static const char *system_prefix(void)
-{
- static const char *prefix;
-
- assert(argv0_path);
- assert(is_absolute_path(argv0_path));
-
- if (!prefix &&
- !(prefix = strip_path_suffix(argv0_path, GIT_EXEC_PATH)) &&
- !(prefix = strip_path_suffix(argv0_path, BINDIR)) &&
- !(prefix = strip_path_suffix(argv0_path, "git"))) {
- prefix = PREFIX;
- trace_printf("RUNTIME_PREFIX requested, "
- "but prefix computation failed. "
- "Using static fallback '%s'.\n", prefix);
- }
- return prefix;
-}
-
-void git_extract_argv0_path(const char *argv0)
-{
- const char *slash;
-
- if (!argv0 || !*argv0)
- return;
-
- slash = find_last_dir_sep(argv0);
-
- if (slash)
- argv0_path = xstrndup(argv0, slash - argv0);
-}
-
-#else
-
-static const char *system_prefix(void)
-{
- return PREFIX;
-}
-
-void git_extract_argv0_path(const char *argv0)
-{
-}
-
-#endif /* RUNTIME_PREFIX */
-
-char *system_path(const char *path)
-{
- struct strbuf d = STRBUF_INIT;
-
- if (is_absolute_path(path))
- return xstrdup(path);
-
- strbuf_addf(&d, "%s/%s", system_prefix(), path);
- return strbuf_detach(&d, NULL);
-}
-
-void git_set_argv_exec_path(const char *exec_path)
-{
- argv_exec_path = exec_path;
- /*
- * Propagate this setting to external programs.
- */
- setenv(EXEC_PATH_ENVIRONMENT, exec_path, 1);
-}
-
-
-/* Returns the highest-priority, location to look for git programs. */
-const char *git_exec_path(void)
-{
- static char *cached_exec_path;
-
- if (argv_exec_path)
- return argv_exec_path;
-
- if (!cached_exec_path) {
- const char *env = getenv(EXEC_PATH_ENVIRONMENT);
- if (env && *env)
- cached_exec_path = xstrdup(env);
- else
- cached_exec_path = system_path(GIT_EXEC_PATH);
- }
- return cached_exec_path;
-}
-
-static void add_path(struct strbuf *out, const char *path)
-{
- if (path && *path) {
- strbuf_add_absolute_path(out, path);
- strbuf_addch(out, PATH_SEP);
- }
-}
-
-void setup_path(void)
-{
- const char *old_path = getenv("PATH");
- struct strbuf new_path = STRBUF_INIT;
-
- add_path(&new_path, git_exec_path());
-
- if (old_path)
- strbuf_addstr(&new_path, old_path);
- else
- strbuf_addstr(&new_path, _PATH_DEFPATH);
-
- setenv("PATH", new_path.buf, 1);
-
- strbuf_release(&new_path);
-}
-
-const char **prepare_git_cmd(struct argv_array *out, const char **argv)
-{
- argv_array_push(out, "git");
- argv_array_pushv(out, argv);
- return out->argv;
-}
-
-int execv_git_cmd(const char **argv) {
- struct argv_array nargv = ARGV_ARRAY_INIT;
-
- prepare_git_cmd(&nargv, argv);
- trace_argv_printf(nargv.argv, "trace: exec:");
-
- /* execvp() can only ever return if it fails */
- sane_execvp("git", (char **)nargv.argv);
-
- trace_printf("trace: exec failed: %s\n", strerror(errno));
-
- argv_array_clear(&nargv);
- return -1;
-}
-
-
-int execl_git_cmd(const char *cmd,...)
-{
- int argc;
- const char *argv[MAX_ARGS + 1];
- const char *arg;
- va_list param;
-
- va_start(param, cmd);
- argv[0] = cmd;
- argc = 1;
- while (argc < MAX_ARGS) {
- arg = argv[argc++] = va_arg(param, char *);
- if (!arg)
- break;
- }
- va_end(param);
- if (MAX_ARGS <= argc)
- return error("too many args to run %s", cmd);
-
- argv[argc] = NULL;
- return execv_git_cmd(argv);
-}
+++ /dev/null
-#ifndef GIT_EXEC_CMD_H
-#define GIT_EXEC_CMD_H
-
-struct argv_array;
-
-extern void git_set_argv_exec_path(const char *exec_path);
-extern void git_extract_argv0_path(const char *path);
-extern const char *git_exec_path(void);
-extern void setup_path(void);
-extern const char **prepare_git_cmd(struct argv_array *out, const char **argv);
-extern int execv_git_cmd(const char **argv); /* NULL terminated */
-LAST_ARG_MUST_BE_NULL
-extern int execl_git_cmd(const char *cmd, ...);
-extern char *system_path(const char *path);
-
-#endif /* GIT_EXEC_CMD_H */
#include "pkt-line.h"
#include "commit.h"
#include "tag.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
#include "pack.h"
#include "sideband.h"
#include "fetch-pack.h"
#include "builtin.h"
#include "config.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
#include "help.h"
#include "run-command.h"
#include "cache.h"
#include "config.h"
#include "builtin.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
#include "run-command.h"
#include "levenshtein.h"
#include "help.h"
#include "pkt-line.h"
#include "object.h"
#include "tag.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
#include "run-command.h"
#include "string-list.h"
#include "url.h"
#include "cache.h"
#include "config.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
#include "http.h"
#include "walker.h"
#include "refs.h"
#include "diff.h"
#include "revision.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
#include "remote.h"
#include "list-objects.h"
#include "sigchain.h"
#include "cache.h"
#include "config.h"
#include "credential.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
#include "run-command.h"
#include "parse-options.h"
#ifdef NO_OPENSSL
* in the traversal (until we mark it SEEN). This is a way to
* let us silently de-dup calls to show() in the caller. This
* is subtly different from the "revision.h:SHOWN" and the
- * "sha1_name.c:ONELINE_SEEN" bits. And also different from
+ * "sha1-name.c:ONELINE_SEEN" bits. And also different from
* the non-de-dup usage in pack-bitmap.c
*/
#define FILTER_SHOWN_BUT_REVISIT (1<<21)
* bundle.c: 16
* http-push.c: 16-----19
* commit.c: 16-----19
- * sha1_name.c: 20
+ * sha1-name.c: 20
* list-objects-filter.c: 21
* builtin/fsck.c: 0--3
* builtin/index-pack.c: 2021
#include "strbuf.h"
#include "walker.h"
#include "http.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
#include "run-command.h"
#include "pkt-line.h"
#include "string-list.h"
#include "remote.h"
#include "strbuf.h"
#include "url.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
#include "run-command.h"
#include "vcs-svn/svndump.h"
#include "notes.h"
--- /dev/null
+#include "cache.h"
+#include "sha1-lookup.h"
+#include "refs.h"
+#include "commit.h"
+
+/*
+ * An array of replacements. The array is kept sorted by the original
+ * sha1.
+ */
+static struct replace_object {
+ struct object_id original;
+ struct object_id replacement;
+} **replace_object;
+
+static int replace_object_alloc, replace_object_nr;
+
+static const unsigned char *replace_sha1_access(size_t index, void *table)
+{
+ struct replace_object **replace = table;
+ return replace[index]->original.hash;
+}
+
+static int replace_object_pos(const unsigned char *sha1)
+{
+ return sha1_pos(sha1, replace_object, replace_object_nr,
+ replace_sha1_access);
+}
+
+static int register_replace_object(struct replace_object *replace,
+ int ignore_dups)
+{
+ int pos = replace_object_pos(replace->original.hash);
+
+ if (0 <= pos) {
+ if (ignore_dups)
+ free(replace);
+ else {
+ free(replace_object[pos]);
+ replace_object[pos] = replace;
+ }
+ return 1;
+ }
+ pos = -pos - 1;
+ ALLOC_GROW(replace_object, replace_object_nr + 1, replace_object_alloc);
+ replace_object_nr++;
+ if (pos < replace_object_nr)
+ MOVE_ARRAY(replace_object + pos + 1, replace_object + pos,
+ replace_object_nr - pos - 1);
+ replace_object[pos] = replace;
+ return 0;
+}
+
+static int register_replace_ref(const char *refname,
+ const struct object_id *oid,
+ int flag, void *cb_data)
+{
+ /* Get sha1 from refname */
+ const char *slash = strrchr(refname, '/');
+ const char *hash = slash ? slash + 1 : refname;
+ struct replace_object *repl_obj = xmalloc(sizeof(*repl_obj));
+
+ if (get_oid_hex(hash, &repl_obj->original)) {
+ free(repl_obj);
+ warning("bad replace ref name: %s", refname);
+ return 0;
+ }
+
+ /* Copy sha1 from the read ref */
+ oidcpy(&repl_obj->replacement, oid);
+
+ /* Register new object */
+ if (register_replace_object(repl_obj, 1))
+ die("duplicate replace ref: %s", refname);
+
+ return 0;
+}
+
+static void prepare_replace_object(void)
+{
+ static int replace_object_prepared;
+
+ if (replace_object_prepared)
+ return;
+
+ for_each_replace_ref(register_replace_ref, NULL);
+ replace_object_prepared = 1;
+ if (!replace_object_nr)
+ check_replace_refs = 0;
+}
+
+/* We allow "recursive" replacement. Only within reason, though */
+#define MAXREPLACEDEPTH 5
+
+/*
+ * If a replacement for object oid has been set up, return the
+ * replacement object's name (replaced recursively, if necessary).
+ * The return value is either oid or a pointer to a
+ * permanently-allocated value. This function always respects replace
+ * references, regardless of the value of check_replace_refs.
+ */
+const struct object_id *do_lookup_replace_object(const struct object_id *oid)
+{
+ int pos, depth = MAXREPLACEDEPTH;
+ const struct object_id *cur = oid;
+
+ prepare_replace_object();
+
+ /* Try to recursively replace the object */
+ do {
+ if (--depth < 0)
+ die("replace depth too high for object %s",
+ oid_to_hex(oid));
+
+ pos = replace_object_pos(cur->hash);
+ if (0 <= pos)
+ cur = &replace_object[pos]->replacement;
+ } while (0 <= pos);
+
+ return cur;
+}
+++ /dev/null
-#include "cache.h"
-#include "sha1-lookup.h"
-#include "refs.h"
-#include "commit.h"
-
-/*
- * An array of replacements. The array is kept sorted by the original
- * sha1.
- */
-static struct replace_object {
- struct object_id original;
- struct object_id replacement;
-} **replace_object;
-
-static int replace_object_alloc, replace_object_nr;
-
-static const unsigned char *replace_sha1_access(size_t index, void *table)
-{
- struct replace_object **replace = table;
- return replace[index]->original.hash;
-}
-
-static int replace_object_pos(const unsigned char *sha1)
-{
- return sha1_pos(sha1, replace_object, replace_object_nr,
- replace_sha1_access);
-}
-
-static int register_replace_object(struct replace_object *replace,
- int ignore_dups)
-{
- int pos = replace_object_pos(replace->original.hash);
-
- if (0 <= pos) {
- if (ignore_dups)
- free(replace);
- else {
- free(replace_object[pos]);
- replace_object[pos] = replace;
- }
- return 1;
- }
- pos = -pos - 1;
- ALLOC_GROW(replace_object, replace_object_nr + 1, replace_object_alloc);
- replace_object_nr++;
- if (pos < replace_object_nr)
- MOVE_ARRAY(replace_object + pos + 1, replace_object + pos,
- replace_object_nr - pos - 1);
- replace_object[pos] = replace;
- return 0;
-}
-
-static int register_replace_ref(const char *refname,
- const struct object_id *oid,
- int flag, void *cb_data)
-{
- /* Get sha1 from refname */
- const char *slash = strrchr(refname, '/');
- const char *hash = slash ? slash + 1 : refname;
- struct replace_object *repl_obj = xmalloc(sizeof(*repl_obj));
-
- if (get_oid_hex(hash, &repl_obj->original)) {
- free(repl_obj);
- warning("bad replace ref name: %s", refname);
- return 0;
- }
-
- /* Copy sha1 from the read ref */
- oidcpy(&repl_obj->replacement, oid);
-
- /* Register new object */
- if (register_replace_object(repl_obj, 1))
- die("duplicate replace ref: %s", refname);
-
- return 0;
-}
-
-static void prepare_replace_object(void)
-{
- static int replace_object_prepared;
-
- if (replace_object_prepared)
- return;
-
- for_each_replace_ref(register_replace_ref, NULL);
- replace_object_prepared = 1;
- if (!replace_object_nr)
- check_replace_refs = 0;
-}
-
-/* We allow "recursive" replacement. Only within reason, though */
-#define MAXREPLACEDEPTH 5
-
-/*
- * If a replacement for object oid has been set up, return the
- * replacement object's name (replaced recursively, if necessary).
- * The return value is either oid or a pointer to a
- * permanently-allocated value. This function always respects replace
- * references, regardless of the value of check_replace_refs.
- */
-const struct object_id *do_lookup_replace_object(const struct object_id *oid)
-{
- int pos, depth = MAXREPLACEDEPTH;
- const struct object_id *cur = oid;
-
- prepare_replace_object();
-
- /* Try to recursively replace the object */
- do {
- if (--depth < 0)
- die("replace depth too high for object %s",
- oid_to_hex(oid));
-
- pos = replace_object_pos(cur->hash);
- if (0 <= pos)
- cur = &replace_object[pos]->replacement;
- } while (0 <= pos);
-
- return cur;
-}
#include "cache.h"
#include "run-command.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
#include "sigchain.h"
#include "argv-array.h"
#include "thread-utils.h"
#include "sequencer.h"
#include "tag.h"
#include "run-command.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
#include "utf8.h"
#include "cache-tree.h"
#include "diff.h"
--- /dev/null
+/*
+ * GIT - The information manager from hell
+ *
+ * Copyright (C) Linus Torvalds, 2005
+ *
+ * This handles basic git sha1 object files - packing, unpacking,
+ * creation etc.
+ */
+#include "cache.h"
+#include "config.h"
+#include "string-list.h"
+#include "lockfile.h"
+#include "delta.h"
+#include "pack.h"
+#include "blob.h"
+#include "commit.h"
+#include "run-command.h"
+#include "tag.h"
+#include "tree.h"
+#include "tree-walk.h"
+#include "refs.h"
+#include "pack-revindex.h"
+#include "sha1-lookup.h"
+#include "bulk-checkin.h"
+#include "repository.h"
+#include "streaming.h"
+#include "dir.h"
+#include "list.h"
+#include "mergesort.h"
+#include "quote.h"
+#include "packfile.h"
+#include "fetch-object.h"
+#include "object-store.h"
+
+/* The maximum size for an object header. */
+#define MAX_HEADER_LEN 32
+
+const unsigned char null_sha1[GIT_MAX_RAWSZ];
+const struct object_id null_oid;
+const struct object_id empty_tree_oid = {
+ EMPTY_TREE_SHA1_BIN_LITERAL
+};
+const struct object_id empty_blob_oid = {
+ EMPTY_BLOB_SHA1_BIN_LITERAL
+};
+
+static void git_hash_sha1_init(git_hash_ctx *ctx)
+{
+ git_SHA1_Init(&ctx->sha1);
+}
+
+static void git_hash_sha1_update(git_hash_ctx *ctx, const void *data, size_t len)
+{
+ git_SHA1_Update(&ctx->sha1, data, len);
+}
+
+static void git_hash_sha1_final(unsigned char *hash, git_hash_ctx *ctx)
+{
+ git_SHA1_Final(hash, &ctx->sha1);
+}
+
+static void git_hash_unknown_init(git_hash_ctx *ctx)
+{
+ die("trying to init unknown hash");
+}
+
+static void git_hash_unknown_update(git_hash_ctx *ctx, const void *data, size_t len)
+{
+ die("trying to update unknown hash");
+}
+
+static void git_hash_unknown_final(unsigned char *hash, git_hash_ctx *ctx)
+{
+ die("trying to finalize unknown hash");
+}
+
+const struct git_hash_algo hash_algos[GIT_HASH_NALGOS] = {
+ {
+ NULL,
+ 0x00000000,
+ 0,
+ 0,
+ git_hash_unknown_init,
+ git_hash_unknown_update,
+ git_hash_unknown_final,
+ NULL,
+ NULL,
+ },
+ {
+ "sha-1",
+ /* "sha1", big-endian */
+ 0x73686131,
+ GIT_SHA1_RAWSZ,
+ GIT_SHA1_HEXSZ,
+ git_hash_sha1_init,
+ git_hash_sha1_update,
+ git_hash_sha1_final,
+ &empty_tree_oid,
+ &empty_blob_oid,
+ },
+};
+
+/*
+ * This is meant to hold a *small* number of objects that you would
+ * want read_sha1_file() to be able to return, but yet you do not want
+ * to write them into the object store (e.g. a browse-only
+ * application).
+ */
+static struct cached_object {
+ unsigned char sha1[20];
+ enum object_type type;
+ void *buf;
+ unsigned long size;
+} *cached_objects;
+static int cached_object_nr, cached_object_alloc;
+
+static struct cached_object empty_tree = {
+ EMPTY_TREE_SHA1_BIN_LITERAL,
+ OBJ_TREE,
+ "",
+ 0
+};
+
+static struct cached_object *find_cached_object(const unsigned char *sha1)
+{
+ int i;
+ struct cached_object *co = cached_objects;
+
+ for (i = 0; i < cached_object_nr; i++, co++) {
+ if (!hashcmp(co->sha1, sha1))
+ return co;
+ }
+ if (!hashcmp(sha1, empty_tree.sha1))
+ return &empty_tree;
+ return NULL;
+}
+
+
+static int get_conv_flags(unsigned flags)
+{
+ if (flags & HASH_RENORMALIZE)
+ return CONV_EOL_RENORMALIZE;
+ else if (flags & HASH_WRITE_OBJECT)
+ return global_conv_flags_eol;
+ else
+ return 0;
+}
+
+
+int mkdir_in_gitdir(const char *path)
+{
+ if (mkdir(path, 0777)) {
+ int saved_errno = errno;
+ struct stat st;
+ struct strbuf sb = STRBUF_INIT;
+
+ if (errno != EEXIST)
+ return -1;
+ /*
+ * Are we looking at a path in a symlinked worktree
+ * whose original repository does not yet have it?
+ * e.g. .git/rr-cache pointing at its original
+ * repository in which the user hasn't performed any
+ * conflict resolution yet?
+ */
+ if (lstat(path, &st) || !S_ISLNK(st.st_mode) ||
+ strbuf_readlink(&sb, path, st.st_size) ||
+ !is_absolute_path(sb.buf) ||
+ mkdir(sb.buf, 0777)) {
+ strbuf_release(&sb);
+ errno = saved_errno;
+ return -1;
+ }
+ strbuf_release(&sb);
+ }
+ return adjust_shared_perm(path);
+}
+
+enum scld_error safe_create_leading_directories(char *path)
+{
+ char *next_component = path + offset_1st_component(path);
+ enum scld_error ret = SCLD_OK;
+
+ while (ret == SCLD_OK && next_component) {
+ struct stat st;
+ char *slash = next_component, slash_character;
+
+ while (*slash && !is_dir_sep(*slash))
+ slash++;
+
+ if (!*slash)
+ break;
+
+ next_component = slash + 1;
+ while (is_dir_sep(*next_component))
+ next_component++;
+ if (!*next_component)
+ break;
+
+ slash_character = *slash;
+ *slash = '\0';
+ if (!stat(path, &st)) {
+ /* path exists */
+ if (!S_ISDIR(st.st_mode)) {
+ errno = ENOTDIR;
+ ret = SCLD_EXISTS;
+ }
+ } else if (mkdir(path, 0777)) {
+ if (errno == EEXIST &&
+ !stat(path, &st) && S_ISDIR(st.st_mode))
+ ; /* somebody created it since we checked */
+ else if (errno == ENOENT)
+ /*
+ * Either mkdir() failed because
+ * somebody just pruned the containing
+ * directory, or stat() failed because
+ * the file that was in our way was
+ * just removed. Either way, inform
+ * the caller that it might be worth
+ * trying again:
+ */
+ ret = SCLD_VANISHED;
+ else
+ ret = SCLD_FAILED;
+ } else if (adjust_shared_perm(path)) {
+ ret = SCLD_PERMS;
+ }
+ *slash = slash_character;
+ }
+ return ret;
+}
+
+enum scld_error safe_create_leading_directories_const(const char *path)
+{
+ int save_errno;
+ /* path points to cache entries, so xstrdup before messing with it */
+ char *buf = xstrdup(path);
+ enum scld_error result = safe_create_leading_directories(buf);
+
+ save_errno = errno;
+ free(buf);
+ errno = save_errno;
+ return result;
+}
+
+int raceproof_create_file(const char *path, create_file_fn fn, void *cb)
+{
+ /*
+ * The number of times we will try to remove empty directories
+ * in the way of path. This is only 1 because if another
+ * process is racily creating directories that conflict with
+ * us, we don't want to fight against them.
+ */
+ int remove_directories_remaining = 1;
+
+ /*
+ * The number of times that we will try to create the
+ * directories containing path. We are willing to attempt this
+ * more than once, because another process could be trying to
+ * clean up empty directories at the same time as we are
+ * trying to create them.
+ */
+ int create_directories_remaining = 3;
+
+ /* A scratch copy of path, filled lazily if we need it: */
+ struct strbuf path_copy = STRBUF_INIT;
+
+ int ret, save_errno;
+
+ /* Sanity check: */
+ assert(*path);
+
+retry_fn:
+ ret = fn(path, cb);
+ save_errno = errno;
+ if (!ret)
+ goto out;
+
+ if (errno == EISDIR && remove_directories_remaining-- > 0) {
+ /*
+ * A directory is in the way. Maybe it is empty; try
+ * to remove it:
+ */
+ if (!path_copy.len)
+ strbuf_addstr(&path_copy, path);
+
+ if (!remove_dir_recursively(&path_copy, REMOVE_DIR_EMPTY_ONLY))
+ goto retry_fn;
+ } else if (errno == ENOENT && create_directories_remaining-- > 0) {
+ /*
+ * Maybe the containing directory didn't exist, or
+ * maybe it was just deleted by a process that is
+ * racing with us to clean up empty directories. Try
+ * to create it:
+ */
+ enum scld_error scld_result;
+
+ if (!path_copy.len)
+ strbuf_addstr(&path_copy, path);
+
+ do {
+ scld_result = safe_create_leading_directories(path_copy.buf);
+ if (scld_result == SCLD_OK)
+ goto retry_fn;
+ } while (scld_result == SCLD_VANISHED && create_directories_remaining-- > 0);
+ }
+
+out:
+ strbuf_release(&path_copy);
+ errno = save_errno;
+ return ret;
+}
+
+static void fill_sha1_path(struct strbuf *buf, const unsigned char *sha1)
+{
+ int i;
+ for (i = 0; i < 20; i++) {
+ static char hex[] = "0123456789abcdef";
+ unsigned int val = sha1[i];
+ strbuf_addch(buf, hex[val >> 4]);
+ strbuf_addch(buf, hex[val & 0xf]);
+ if (!i)
+ strbuf_addch(buf, '/');
+ }
+}
+
+void sha1_file_name(struct repository *r, struct strbuf *buf, const unsigned char *sha1)
+{
+ strbuf_addstr(buf, r->objects->objectdir);
+ strbuf_addch(buf, '/');
+ fill_sha1_path(buf, sha1);
+}
+
+struct strbuf *alt_scratch_buf(struct alternate_object_database *alt)
+{
+ strbuf_setlen(&alt->scratch, alt->base_len);
+ return &alt->scratch;
+}
+
+static const char *alt_sha1_path(struct alternate_object_database *alt,
+ const unsigned char *sha1)
+{
+ struct strbuf *buf = alt_scratch_buf(alt);
+ fill_sha1_path(buf, sha1);
+ return buf->buf;
+}
+
+/*
+ * Return non-zero iff the path is usable as an alternate object database.
+ */
+static int alt_odb_usable(struct raw_object_store *o,
+ struct strbuf *path,
+ const char *normalized_objdir)
+{
+ struct alternate_object_database *alt;
+
+ /* Detect cases where alternate disappeared */
+ if (!is_directory(path->buf)) {
+ error("object directory %s does not exist; "
+ "check .git/objects/info/alternates.",
+ path->buf);
+ return 0;
+ }
+
+ /*
+ * Prevent the common mistake of listing the same
+ * thing twice, or object directory itself.
+ */
+ for (alt = o->alt_odb_list; alt; alt = alt->next) {
+ if (!fspathcmp(path->buf, alt->path))
+ return 0;
+ }
+ if (!fspathcmp(path->buf, normalized_objdir))
+ return 0;
+
+ return 1;
+}
+
+/*
+ * Prepare alternate object database registry.
+ *
+ * The variable alt_odb_list points at the list of struct
+ * alternate_object_database. The elements on this list come from
+ * non-empty elements from colon separated ALTERNATE_DB_ENVIRONMENT
+ * environment variable, and $GIT_OBJECT_DIRECTORY/info/alternates,
+ * whose contents is similar to that environment variable but can be
+ * LF separated. Its base points at a statically allocated buffer that
+ * contains "/the/directory/corresponding/to/.git/objects/...", while
+ * its name points just after the slash at the end of ".git/objects/"
+ * in the example above, and has enough space to hold 40-byte hex
+ * SHA1, an extra slash for the first level indirection, and the
+ * terminating NUL.
+ */
+static void read_info_alternates(struct repository *r,
+ const char *relative_base,
+ int depth);
+static int link_alt_odb_entry(struct repository *r, const char *entry,
+ const char *relative_base, int depth, const char *normalized_objdir)
+{
+ struct alternate_object_database *ent;
+ struct strbuf pathbuf = STRBUF_INIT;
+
+ if (!is_absolute_path(entry) && relative_base) {
+ strbuf_realpath(&pathbuf, relative_base, 1);
+ strbuf_addch(&pathbuf, '/');
+ }
+ strbuf_addstr(&pathbuf, entry);
+
+ if (strbuf_normalize_path(&pathbuf) < 0 && relative_base) {
+ error("unable to normalize alternate object path: %s",
+ pathbuf.buf);
+ strbuf_release(&pathbuf);
+ return -1;
+ }
+
+ /*
+ * The trailing slash after the directory name is given by
+ * this function at the end. Remove duplicates.
+ */
+ while (pathbuf.len && pathbuf.buf[pathbuf.len - 1] == '/')
+ strbuf_setlen(&pathbuf, pathbuf.len - 1);
+
+ if (!alt_odb_usable(r->objects, &pathbuf, normalized_objdir)) {
+ strbuf_release(&pathbuf);
+ return -1;
+ }
+
+ ent = alloc_alt_odb(pathbuf.buf);
+
+ /* add the alternate entry */
+ *r->objects->alt_odb_tail = ent;
+ r->objects->alt_odb_tail = &(ent->next);
+ ent->next = NULL;
+
+ /* recursively add alternates */
+ read_info_alternates(r, pathbuf.buf, depth + 1);
+
+ strbuf_release(&pathbuf);
+ return 0;
+}
+
+static const char *parse_alt_odb_entry(const char *string,
+ int sep,
+ struct strbuf *out)
+{
+ const char *end;
+
+ strbuf_reset(out);
+
+ if (*string == '#') {
+ /* comment; consume up to next separator */
+ end = strchrnul(string, sep);
+ } else if (*string == '"' && !unquote_c_style(out, string, &end)) {
+ /*
+ * quoted path; unquote_c_style has copied the
+ * data for us and set "end". Broken quoting (e.g.,
+ * an entry that doesn't end with a quote) falls
+ * back to the unquoted case below.
+ */
+ } else {
+ /* normal, unquoted path */
+ end = strchrnul(string, sep);
+ strbuf_add(out, string, end - string);
+ }
+
+ if (*end)
+ end++;
+ return end;
+}
+
+static void link_alt_odb_entries(struct repository *r, const char *alt,
+ int sep, const char *relative_base, int depth)
+{
+ struct strbuf objdirbuf = STRBUF_INIT;
+ struct strbuf entry = STRBUF_INIT;
+
+ if (!alt || !*alt)
+ return;
+
+ if (depth > 5) {
+ error("%s: ignoring alternate object stores, nesting too deep.",
+ relative_base);
+ return;
+ }
+
+ strbuf_add_absolute_path(&objdirbuf, r->objects->objectdir);
+ if (strbuf_normalize_path(&objdirbuf) < 0)
+ die("unable to normalize object directory: %s",
+ objdirbuf.buf);
+
+ while (*alt) {
+ alt = parse_alt_odb_entry(alt, sep, &entry);
+ if (!entry.len)
+ continue;
+ link_alt_odb_entry(r, entry.buf,
+ relative_base, depth, objdirbuf.buf);
+ }
+ strbuf_release(&entry);
+ strbuf_release(&objdirbuf);
+}
+
+static void read_info_alternates(struct repository *r,
+ const char *relative_base,
+ int depth)
+{
+ char *path;
+ struct strbuf buf = STRBUF_INIT;
+
+ path = xstrfmt("%s/info/alternates", relative_base);
+ if (strbuf_read_file(&buf, path, 1024) < 0) {
+ warn_on_fopen_errors(path);
+ free(path);
+ return;
+ }
+
+ link_alt_odb_entries(r, buf.buf, '\n', relative_base, depth);
+ strbuf_release(&buf);
+ free(path);
+}
+
+struct alternate_object_database *alloc_alt_odb(const char *dir)
+{
+ struct alternate_object_database *ent;
+
+ FLEX_ALLOC_STR(ent, path, dir);
+ strbuf_init(&ent->scratch, 0);
+ strbuf_addf(&ent->scratch, "%s/", dir);
+ ent->base_len = ent->scratch.len;
+
+ return ent;
+}
+
+void add_to_alternates_file(const char *reference)
+{
+ struct lock_file lock = LOCK_INIT;
+ char *alts = git_pathdup("objects/info/alternates");
+ FILE *in, *out;
+ int found = 0;
+
+ hold_lock_file_for_update(&lock, alts, LOCK_DIE_ON_ERROR);
+ out = fdopen_lock_file(&lock, "w");
+ if (!out)
+ die_errno("unable to fdopen alternates lockfile");
+
+ in = fopen(alts, "r");
+ if (in) {
+ struct strbuf line = STRBUF_INIT;
+
+ while (strbuf_getline(&line, in) != EOF) {
+ if (!strcmp(reference, line.buf)) {
+ found = 1;
+ break;
+ }
+ fprintf_or_die(out, "%s\n", line.buf);
+ }
+
+ strbuf_release(&line);
+ fclose(in);
+ }
+ else if (errno != ENOENT)
+ die_errno("unable to read alternates file");
+
+ if (found) {
+ rollback_lock_file(&lock);
+ } else {
+ fprintf_or_die(out, "%s\n", reference);
+ if (commit_lock_file(&lock))
+ die_errno("unable to move new alternates file into place");
+ if (the_repository->objects->alt_odb_tail)
+ link_alt_odb_entries(the_repository, reference,
+ '\n', NULL, 0);
+ }
+ free(alts);
+}
+
+void add_to_alternates_memory(const char *reference)
+{
+ /*
+ * Make sure alternates are initialized, or else our entry may be
+ * overwritten when they are.
+ */
+ prepare_alt_odb(the_repository);
+
+ link_alt_odb_entries(the_repository, reference,
+ '\n', NULL, 0);
+}
+
+/*
+ * Compute the exact path an alternate is at and returns it. In case of
+ * error NULL is returned and the human readable error is added to `err`
+ * `path` may be relative and should point to $GITDIR.
+ * `err` must not be null.
+ */
+char *compute_alternate_path(const char *path, struct strbuf *err)
+{
+ char *ref_git = NULL;
+ const char *repo, *ref_git_s;
+ int seen_error = 0;
+
+ ref_git_s = real_path_if_valid(path);
+ if (!ref_git_s) {
+ seen_error = 1;
+ strbuf_addf(err, _("path '%s' does not exist"), path);
+ goto out;
+ } else
+ /*
+ * Beware: read_gitfile(), real_path() and mkpath()
+ * return static buffer
+ */
+ ref_git = xstrdup(ref_git_s);
+
+ repo = read_gitfile(ref_git);
+ if (!repo)
+ repo = read_gitfile(mkpath("%s/.git", ref_git));
+ if (repo) {
+ free(ref_git);
+ ref_git = xstrdup(repo);
+ }
+
+ if (!repo && is_directory(mkpath("%s/.git/objects", ref_git))) {
+ char *ref_git_git = mkpathdup("%s/.git", ref_git);
+ free(ref_git);
+ ref_git = ref_git_git;
+ } else if (!is_directory(mkpath("%s/objects", ref_git))) {
+ struct strbuf sb = STRBUF_INIT;
+ seen_error = 1;
+ if (get_common_dir(&sb, ref_git)) {
+ strbuf_addf(err,
+ _("reference repository '%s' as a linked "
+ "checkout is not supported yet."),
+ path);
+ goto out;
+ }
+
+ strbuf_addf(err, _("reference repository '%s' is not a "
+ "local repository."), path);
+ goto out;
+ }
+
+ if (!access(mkpath("%s/shallow", ref_git), F_OK)) {
+ strbuf_addf(err, _("reference repository '%s' is shallow"),
+ path);
+ seen_error = 1;
+ goto out;
+ }
+
+ if (!access(mkpath("%s/info/grafts", ref_git), F_OK)) {
+ strbuf_addf(err,
+ _("reference repository '%s' is grafted"),
+ path);
+ seen_error = 1;
+ goto out;
+ }
+
+out:
+ if (seen_error) {
+ FREE_AND_NULL(ref_git);
+ }
+
+ return ref_git;
+}
+
+int foreach_alt_odb(alt_odb_fn fn, void *cb)
+{
+ struct alternate_object_database *ent;
+ int r = 0;
+
+ prepare_alt_odb(the_repository);
+ for (ent = the_repository->objects->alt_odb_list; ent; ent = ent->next) {
+ r = fn(ent, cb);
+ if (r)
+ break;
+ }
+ return r;
+}
+
+void prepare_alt_odb(struct repository *r)
+{
+ if (r->objects->alt_odb_tail)
+ return;
+
+ r->objects->alt_odb_tail = &r->objects->alt_odb_list;
+ link_alt_odb_entries(r, r->objects->alternate_db, PATH_SEP, NULL, 0);
+
+ read_info_alternates(r, r->objects->objectdir, 0);
+}
+
+/* Returns 1 if we have successfully freshened the file, 0 otherwise. */
+static int freshen_file(const char *fn)
+{
+ struct utimbuf t;
+ t.actime = t.modtime = time(NULL);
+ return !utime(fn, &t);
+}
+
+/*
+ * All of the check_and_freshen functions return 1 if the file exists and was
+ * freshened (if freshening was requested), 0 otherwise. If they return
+ * 0, you should not assume that it is safe to skip a write of the object (it
+ * either does not exist on disk, or has a stale mtime and may be subject to
+ * pruning).
+ */
+int check_and_freshen_file(const char *fn, int freshen)
+{
+ if (access(fn, F_OK))
+ return 0;
+ if (freshen && !freshen_file(fn))
+ return 0;
+ return 1;
+}
+
+static int check_and_freshen_local(const unsigned char *sha1, int freshen)
+{
+ static struct strbuf buf = STRBUF_INIT;
+
+ strbuf_reset(&buf);
+ sha1_file_name(the_repository, &buf, sha1);
+
+ return check_and_freshen_file(buf.buf, freshen);
+}
+
+static int check_and_freshen_nonlocal(const unsigned char *sha1, int freshen)
+{
+ struct alternate_object_database *alt;
+ prepare_alt_odb(the_repository);
+ for (alt = the_repository->objects->alt_odb_list; alt; alt = alt->next) {
+ const char *path = alt_sha1_path(alt, sha1);
+ if (check_and_freshen_file(path, freshen))
+ return 1;
+ }
+ return 0;
+}
+
+static int check_and_freshen(const unsigned char *sha1, int freshen)
+{
+ return check_and_freshen_local(sha1, freshen) ||
+ check_and_freshen_nonlocal(sha1, freshen);
+}
+
+int has_loose_object_nonlocal(const unsigned char *sha1)
+{
+ return check_and_freshen_nonlocal(sha1, 0);
+}
+
+static int has_loose_object(const unsigned char *sha1)
+{
+ return check_and_freshen(sha1, 0);
+}
+
+static void mmap_limit_check(size_t length)
+{
+ static size_t limit = 0;
+ if (!limit) {
+ limit = git_env_ulong("GIT_MMAP_LIMIT", 0);
+ if (!limit)
+ limit = SIZE_MAX;
+ }
+ if (length > limit)
+ die("attempting to mmap %"PRIuMAX" over limit %"PRIuMAX,
+ (uintmax_t)length, (uintmax_t)limit);
+}
+
+void *xmmap_gently(void *start, size_t length,
+ int prot, int flags, int fd, off_t offset)
+{
+ void *ret;
+
+ mmap_limit_check(length);
+ ret = mmap(start, length, prot, flags, fd, offset);
+ if (ret == MAP_FAILED) {
+ if (!length)
+ return NULL;
+ release_pack_memory(length);
+ ret = mmap(start, length, prot, flags, fd, offset);
+ }
+ return ret;
+}
+
+void *xmmap(void *start, size_t length,
+ int prot, int flags, int fd, off_t offset)
+{
+ void *ret = xmmap_gently(start, length, prot, flags, fd, offset);
+ if (ret == MAP_FAILED)
+ die_errno("mmap failed");
+ return ret;
+}
+
+/*
+ * With an in-core object data in "map", rehash it to make sure the
+ * object name actually matches "sha1" to detect object corruption.
+ * With "map" == NULL, try reading the object named with "sha1" using
+ * the streaming interface and rehash it to do the same.
+ */
+int check_object_signature(const struct object_id *oid, void *map,
+ unsigned long size, const char *type)
+{
+ struct object_id real_oid;
+ enum object_type obj_type;
+ struct git_istream *st;
+ git_hash_ctx c;
+ char hdr[MAX_HEADER_LEN];
+ int hdrlen;
+
+ if (map) {
+ hash_object_file(map, size, type, &real_oid);
+ return oidcmp(oid, &real_oid) ? -1 : 0;
+ }
+
+ st = open_istream(oid, &obj_type, &size, NULL);
+ if (!st)
+ return -1;
+
+ /* Generate the header */
+ hdrlen = xsnprintf(hdr, sizeof(hdr), "%s %lu", type_name(obj_type), size) + 1;
+
+ /* Sha1.. */
+ the_hash_algo->init_fn(&c);
+ the_hash_algo->update_fn(&c, hdr, hdrlen);
+ for (;;) {
+ char buf[1024 * 16];
+ ssize_t readlen = read_istream(st, buf, sizeof(buf));
+
+ if (readlen < 0) {
+ close_istream(st);
+ return -1;
+ }
+ if (!readlen)
+ break;
+ the_hash_algo->update_fn(&c, buf, readlen);
+ }
+ the_hash_algo->final_fn(real_oid.hash, &c);
+ close_istream(st);
+ return oidcmp(oid, &real_oid) ? -1 : 0;
+}
+
+int git_open_cloexec(const char *name, int flags)
+{
+ int fd;
+ static int o_cloexec = O_CLOEXEC;
+
+ fd = open(name, flags | o_cloexec);
+ if ((o_cloexec & O_CLOEXEC) && fd < 0 && errno == EINVAL) {
+ /* Try again w/o O_CLOEXEC: the kernel might not support it */
+ o_cloexec &= ~O_CLOEXEC;
+ fd = open(name, flags | o_cloexec);
+ }
+
+#if defined(F_GETFD) && defined(F_SETFD) && defined(FD_CLOEXEC)
+ {
+ static int fd_cloexec = FD_CLOEXEC;
+
+ if (!o_cloexec && 0 <= fd && fd_cloexec) {
+ /* Opened w/o O_CLOEXEC? try with fcntl(2) to add it */
+ int flags = fcntl(fd, F_GETFD);
+ if (fcntl(fd, F_SETFD, flags | fd_cloexec))
+ fd_cloexec = 0;
+ }
+ }
+#endif
+ return fd;
+}
+
+/*
+ * Find "sha1" as a loose object in the local repository or in an alternate.
+ * Returns 0 on success, negative on failure.
+ *
+ * The "path" out-parameter will give the path of the object we found (if any).
+ * Note that it may point to static storage and is only valid until another
+ * call to sha1_file_name(), etc.
+ */
+static int stat_sha1_file(struct repository *r, const unsigned char *sha1,
+ struct stat *st, const char **path)
+{
+ struct alternate_object_database *alt;
+ static struct strbuf buf = STRBUF_INIT;
+
+ strbuf_reset(&buf);
+ sha1_file_name(r, &buf, sha1);
+ *path = buf.buf;
+
+ if (!lstat(*path, st))
+ return 0;
+
+ prepare_alt_odb(r);
+ errno = ENOENT;
+ for (alt = r->objects->alt_odb_list; alt; alt = alt->next) {
+ *path = alt_sha1_path(alt, sha1);
+ if (!lstat(*path, st))
+ return 0;
+ }
+
+ return -1;
+}
+
+/*
+ * Like stat_sha1_file(), but actually open the object and return the
+ * descriptor. See the caveats on the "path" parameter above.
+ */
+static int open_sha1_file(struct repository *r,
+ const unsigned char *sha1, const char **path)
+{
+ int fd;
+ struct alternate_object_database *alt;
+ int most_interesting_errno;
+ static struct strbuf buf = STRBUF_INIT;
+
+ strbuf_reset(&buf);
+ sha1_file_name(r, &buf, sha1);
+ *path = buf.buf;
+
+ fd = git_open(*path);
+ if (fd >= 0)
+ return fd;
+ most_interesting_errno = errno;
+
+ prepare_alt_odb(r);
+ for (alt = r->objects->alt_odb_list; alt; alt = alt->next) {
+ *path = alt_sha1_path(alt, sha1);
+ fd = git_open(*path);
+ if (fd >= 0)
+ return fd;
+ if (most_interesting_errno == ENOENT)
+ most_interesting_errno = errno;
+ }
+ errno = most_interesting_errno;
+ return -1;
+}
+
+/*
+ * Map the loose object at "path" if it is not NULL, or the path found by
+ * searching for a loose object named "sha1".
+ */
+static void *map_sha1_file_1(struct repository *r, const char *path,
+ const unsigned char *sha1, unsigned long *size)
+{
+ void *map;
+ int fd;
+
+ if (path)
+ fd = git_open(path);
+ else
+ fd = open_sha1_file(r, sha1, &path);
+ map = NULL;
+ if (fd >= 0) {
+ struct stat st;
+
+ if (!fstat(fd, &st)) {
+ *size = xsize_t(st.st_size);
+ if (!*size) {
+ /* mmap() is forbidden on empty files */
+ error("object file %s is empty", path);
+ return NULL;
+ }
+ map = xmmap(NULL, *size, PROT_READ, MAP_PRIVATE, fd, 0);
+ }
+ close(fd);
+ }
+ return map;
+}
+
+void *map_sha1_file(struct repository *r,
+ const unsigned char *sha1, unsigned long *size)
+{
+ return map_sha1_file_1(r, NULL, sha1, size);
+}
+
+static int unpack_sha1_short_header(git_zstream *stream,
+ unsigned char *map, unsigned long mapsize,
+ void *buffer, unsigned long bufsiz)
+{
+ /* Get the data stream */
+ memset(stream, 0, sizeof(*stream));
+ stream->next_in = map;
+ stream->avail_in = mapsize;
+ stream->next_out = buffer;
+ stream->avail_out = bufsiz;
+
+ git_inflate_init(stream);
+ return git_inflate(stream, 0);
+}
+
+int unpack_sha1_header(git_zstream *stream,
+ unsigned char *map, unsigned long mapsize,
+ void *buffer, unsigned long bufsiz)
+{
+ int status = unpack_sha1_short_header(stream, map, mapsize,
+ buffer, bufsiz);
+
+ if (status < Z_OK)
+ return status;
+
+ /* Make sure we have the terminating NUL */
+ if (!memchr(buffer, '\0', stream->next_out - (unsigned char *)buffer))
+ return -1;
+ return 0;
+}
+
+static int unpack_sha1_header_to_strbuf(git_zstream *stream, unsigned char *map,
+ unsigned long mapsize, void *buffer,
+ unsigned long bufsiz, struct strbuf *header)
+{
+ int status;
+
+ status = unpack_sha1_short_header(stream, map, mapsize, buffer, bufsiz);
+ if (status < Z_OK)
+ return -1;
+
+ /*
+ * Check if entire header is unpacked in the first iteration.
+ */
+ if (memchr(buffer, '\0', stream->next_out - (unsigned char *)buffer))
+ return 0;
+
+ /*
+ * buffer[0..bufsiz] was not large enough. Copy the partial
+ * result out to header, and then append the result of further
+ * reading the stream.
+ */
+ strbuf_add(header, buffer, stream->next_out - (unsigned char *)buffer);
+ stream->next_out = buffer;
+ stream->avail_out = bufsiz;
+
+ do {
+ status = git_inflate(stream, 0);
+ strbuf_add(header, buffer, stream->next_out - (unsigned char *)buffer);
+ if (memchr(buffer, '\0', stream->next_out - (unsigned char *)buffer))
+ return 0;
+ stream->next_out = buffer;
+ stream->avail_out = bufsiz;
+ } while (status != Z_STREAM_END);
+ return -1;
+}
+
+static void *unpack_sha1_rest(git_zstream *stream, void *buffer, unsigned long size, const unsigned char *sha1)
+{
+ int bytes = strlen(buffer) + 1;
+ unsigned char *buf = xmallocz(size);
+ unsigned long n;
+ int status = Z_OK;
+
+ n = stream->total_out - bytes;
+ if (n > size)
+ n = size;
+ memcpy(buf, (char *) buffer + bytes, n);
+ bytes = n;
+ if (bytes <= size) {
+ /*
+ * The above condition must be (bytes <= size), not
+ * (bytes < size). In other words, even though we
+ * expect no more output and set avail_out to zero,
+ * the input zlib stream may have bytes that express
+ * "this concludes the stream", and we *do* want to
+ * eat that input.
+ *
+ * Otherwise we would not be able to test that we
+ * consumed all the input to reach the expected size;
+ * we also want to check that zlib tells us that all
+ * went well with status == Z_STREAM_END at the end.
+ */
+ stream->next_out = buf + bytes;
+ stream->avail_out = size - bytes;
+ while (status == Z_OK)
+ status = git_inflate(stream, Z_FINISH);
+ }
+ if (status == Z_STREAM_END && !stream->avail_in) {
+ git_inflate_end(stream);
+ return buf;
+ }
+
+ if (status < 0)
+ error("corrupt loose object '%s'", sha1_to_hex(sha1));
+ else if (stream->avail_in)
+ error("garbage at end of loose object '%s'",
+ sha1_to_hex(sha1));
+ free(buf);
+ return NULL;
+}
+
+/*
+ * We used to just use "sscanf()", but that's actually way
+ * too permissive for what we want to check. So do an anal
+ * object header parse by hand.
+ */
+static int parse_sha1_header_extended(const char *hdr, struct object_info *oi,
+ unsigned int flags)
+{
+ const char *type_buf = hdr;
+ unsigned long size;
+ int type, type_len = 0;
+
+ /*
+ * The type can be of any size but is followed by
+ * a space.
+ */
+ for (;;) {
+ char c = *hdr++;
+ if (!c)
+ return -1;
+ if (c == ' ')
+ break;
+ type_len++;
+ }
+
+ type = type_from_string_gently(type_buf, type_len, 1);
+ if (oi->type_name)
+ strbuf_add(oi->type_name, type_buf, type_len);
+ /*
+ * Set type to 0 if its an unknown object and
+ * we're obtaining the type using '--allow-unknown-type'
+ * option.
+ */
+ if ((flags & OBJECT_INFO_ALLOW_UNKNOWN_TYPE) && (type < 0))
+ type = 0;
+ else if (type < 0)
+ die("invalid object type");
+ if (oi->typep)
+ *oi->typep = type;
+
+ /*
+ * The length must follow immediately, and be in canonical
+ * decimal format (ie "010" is not valid).
+ */
+ size = *hdr++ - '0';
+ if (size > 9)
+ return -1;
+ if (size) {
+ for (;;) {
+ unsigned long c = *hdr - '0';
+ if (c > 9)
+ break;
+ hdr++;
+ size = size * 10 + c;
+ }
+ }
+
+ if (oi->sizep)
+ *oi->sizep = size;
+
+ /*
+ * The length must be followed by a zero byte
+ */
+ return *hdr ? -1 : type;
+}
+
+int parse_sha1_header(const char *hdr, unsigned long *sizep)
+{
+ struct object_info oi = OBJECT_INFO_INIT;
+
+ oi.sizep = sizep;
+ return parse_sha1_header_extended(hdr, &oi, 0);
+}
+
+static int sha1_loose_object_info(struct repository *r,
+ const unsigned char *sha1,
+ struct object_info *oi, int flags)
+{
+ int status = 0;
+ unsigned long mapsize;
+ void *map;
+ git_zstream stream;
+ char hdr[MAX_HEADER_LEN];
+ struct strbuf hdrbuf = STRBUF_INIT;
+ unsigned long size_scratch;
+
+ if (oi->delta_base_sha1)
+ hashclr(oi->delta_base_sha1);
+
+ /*
+ * If we don't care about type or size, then we don't
+ * need to look inside the object at all. Note that we
+ * do not optimize out the stat call, even if the
+ * caller doesn't care about the disk-size, since our
+ * return value implicitly indicates whether the
+ * object even exists.
+ */
+ if (!oi->typep && !oi->type_name && !oi->sizep && !oi->contentp) {
+ const char *path;
+ struct stat st;
+ if (stat_sha1_file(r, sha1, &st, &path) < 0)
+ return -1;
+ if (oi->disk_sizep)
+ *oi->disk_sizep = st.st_size;
+ return 0;
+ }
+
+ map = map_sha1_file(r, sha1, &mapsize);
+ if (!map)
+ return -1;
+
+ if (!oi->sizep)
+ oi->sizep = &size_scratch;
+
+ if (oi->disk_sizep)
+ *oi->disk_sizep = mapsize;
+ if ((flags & OBJECT_INFO_ALLOW_UNKNOWN_TYPE)) {
+ if (unpack_sha1_header_to_strbuf(&stream, map, mapsize, hdr, sizeof(hdr), &hdrbuf) < 0)
+ status = error("unable to unpack %s header with --allow-unknown-type",
+ sha1_to_hex(sha1));
+ } else if (unpack_sha1_header(&stream, map, mapsize, hdr, sizeof(hdr)) < 0)
+ status = error("unable to unpack %s header",
+ sha1_to_hex(sha1));
+ if (status < 0)
+ ; /* Do nothing */
+ else if (hdrbuf.len) {
+ if ((status = parse_sha1_header_extended(hdrbuf.buf, oi, flags)) < 0)
+ status = error("unable to parse %s header with --allow-unknown-type",
+ sha1_to_hex(sha1));
+ } else if ((status = parse_sha1_header_extended(hdr, oi, flags)) < 0)
+ status = error("unable to parse %s header", sha1_to_hex(sha1));
+
+ if (status >= 0 && oi->contentp) {
+ *oi->contentp = unpack_sha1_rest(&stream, hdr,
+ *oi->sizep, sha1);
+ if (!*oi->contentp) {
+ git_inflate_end(&stream);
+ status = -1;
+ }
+ } else
+ git_inflate_end(&stream);
+
+ munmap(map, mapsize);
+ if (status && oi->typep)
+ *oi->typep = status;
+ if (oi->sizep == &size_scratch)
+ oi->sizep = NULL;
+ strbuf_release(&hdrbuf);
+ oi->whence = OI_LOOSE;
+ return (status < 0) ? status : 0;
+}
+
+int fetch_if_missing = 1;
+
+int oid_object_info_extended(const struct object_id *oid, struct object_info *oi, unsigned flags)
+{
+ static struct object_info blank_oi = OBJECT_INFO_INIT;
+ struct pack_entry e;
+ int rtype;
+ const struct object_id *real = oid;
+ int already_retried = 0;
+
+ if (flags & OBJECT_INFO_LOOKUP_REPLACE)
+ real = lookup_replace_object(oid);
+
+ if (is_null_oid(real))
+ return -1;
+
+ if (!oi)
+ oi = &blank_oi;
+
+ if (!(flags & OBJECT_INFO_SKIP_CACHED)) {
+ struct cached_object *co = find_cached_object(real->hash);
+ if (co) {
+ if (oi->typep)
+ *(oi->typep) = co->type;
+ if (oi->sizep)
+ *(oi->sizep) = co->size;
+ if (oi->disk_sizep)
+ *(oi->disk_sizep) = 0;
+ if (oi->delta_base_sha1)
+ hashclr(oi->delta_base_sha1);
+ if (oi->type_name)
+ strbuf_addstr(oi->type_name, type_name(co->type));
+ if (oi->contentp)
+ *oi->contentp = xmemdupz(co->buf, co->size);
+ oi->whence = OI_CACHED;
+ return 0;
+ }
+ }
+
+ while (1) {
+ if (find_pack_entry(the_repository, real->hash, &e))
+ break;
+
+ if (flags & OBJECT_INFO_IGNORE_LOOSE)
+ return -1;
+
+ /* Most likely it's a loose object. */
+ if (!sha1_loose_object_info(the_repository, real->hash, oi, flags))
+ return 0;
+
+ /* Not a loose object; someone else may have just packed it. */
+ if (!(flags & OBJECT_INFO_QUICK)) {
+ reprepare_packed_git(the_repository);
+ if (find_pack_entry(the_repository, real->hash, &e))
+ break;
+ }
+
+ /* Check if it is a missing object */
+ if (fetch_if_missing && repository_format_partial_clone &&
+ !already_retried) {
+ /*
+ * TODO Investigate haveing fetch_object() return
+ * TODO error/success and stopping the music here.
+ */
+ fetch_object(repository_format_partial_clone, real->hash);
+ already_retried = 1;
+ continue;
+ }
+
+ return -1;
+ }
+
+ if (oi == &blank_oi)
+ /*
+ * We know that the caller doesn't actually need the
+ * information below, so return early.
+ */
+ return 0;
+ rtype = packed_object_info(e.p, e.offset, oi);
+ if (rtype < 0) {
+ mark_bad_packed_object(e.p, real->hash);
+ return oid_object_info_extended(real, oi, 0);
+ } else if (oi->whence == OI_PACKED) {
+ oi->u.packed.offset = e.offset;
+ oi->u.packed.pack = e.p;
+ oi->u.packed.is_delta = (rtype == OBJ_REF_DELTA ||
+ rtype == OBJ_OFS_DELTA);
+ }
+
+ return 0;
+}
+
+/* returns enum object_type or negative */
+int oid_object_info(const struct object_id *oid, unsigned long *sizep)
+{
+ enum object_type type;
+ struct object_info oi = OBJECT_INFO_INIT;
+
+ oi.typep = &type;
+ oi.sizep = sizep;
+ if (oid_object_info_extended(oid, &oi,
+ OBJECT_INFO_LOOKUP_REPLACE) < 0)
+ return -1;
+ return type;
+}
+
+static void *read_object(const unsigned char *sha1, enum object_type *type,
+ unsigned long *size)
+{
+ struct object_id oid;
+ struct object_info oi = OBJECT_INFO_INIT;
+ void *content;
+ oi.typep = type;
+ oi.sizep = size;
+ oi.contentp = &content;
+
+ hashcpy(oid.hash, sha1);
+
+ if (oid_object_info_extended(&oid, &oi, 0) < 0)
+ return NULL;
+ return content;
+}
+
+int pretend_object_file(void *buf, unsigned long len, enum object_type type,
+ struct object_id *oid)
+{
+ struct cached_object *co;
+
+ hash_object_file(buf, len, type_name(type), oid);
+ if (has_sha1_file(oid->hash) || find_cached_object(oid->hash))
+ return 0;
+ ALLOC_GROW(cached_objects, cached_object_nr + 1, cached_object_alloc);
+ co = &cached_objects[cached_object_nr++];
+ co->size = len;
+ co->type = type;
+ co->buf = xmalloc(len);
+ memcpy(co->buf, buf, len);
+ hashcpy(co->sha1, oid->hash);
+ return 0;
+}
+
+/*
+ * This function dies on corrupt objects; the callers who want to
+ * deal with them should arrange to call read_object() and give error
+ * messages themselves.
+ */
+void *read_object_file_extended(const struct object_id *oid,
+ enum object_type *type,
+ unsigned long *size,
+ int lookup_replace)
+{
+ void *data;
+ const struct packed_git *p;
+ const char *path;
+ struct stat st;
+ const struct object_id *repl = lookup_replace ? lookup_replace_object(oid)
+ : oid;
+
+ errno = 0;
+ data = read_object(repl->hash, type, size);
+ if (data)
+ return data;
+
+ if (errno && errno != ENOENT)
+ die_errno("failed to read object %s", oid_to_hex(oid));
+
+ /* die if we replaced an object with one that does not exist */
+ if (repl != oid)
+ die("replacement %s not found for %s",
+ oid_to_hex(repl), oid_to_hex(oid));
+
+ if (!stat_sha1_file(the_repository, repl->hash, &st, &path))
+ die("loose object %s (stored in %s) is corrupt",
+ oid_to_hex(repl), path);
+
+ if ((p = has_packed_and_bad(repl->hash)) != NULL)
+ die("packed object %s (stored in %s) is corrupt",
+ oid_to_hex(repl), p->pack_name);
+
+ return NULL;
+}
+
+void *read_object_with_reference(const struct object_id *oid,
+ const char *required_type_name,
+ unsigned long *size,
+ struct object_id *actual_oid_return)
+{
+ enum object_type type, required_type;
+ void *buffer;
+ unsigned long isize;
+ struct object_id actual_oid;
+
+ required_type = type_from_string(required_type_name);
+ oidcpy(&actual_oid, oid);
+ while (1) {
+ int ref_length = -1;
+ const char *ref_type = NULL;
+
+ buffer = read_object_file(&actual_oid, &type, &isize);
+ if (!buffer)
+ return NULL;
+ if (type == required_type) {
+ *size = isize;
+ if (actual_oid_return)
+ oidcpy(actual_oid_return, &actual_oid);
+ return buffer;
+ }
+ /* Handle references */
+ else if (type == OBJ_COMMIT)
+ ref_type = "tree ";
+ else if (type == OBJ_TAG)
+ ref_type = "object ";
+ else {
+ free(buffer);
+ return NULL;
+ }
+ ref_length = strlen(ref_type);
+
+ if (ref_length + GIT_SHA1_HEXSZ > isize ||
+ memcmp(buffer, ref_type, ref_length) ||
+ get_oid_hex((char *) buffer + ref_length, &actual_oid)) {
+ free(buffer);
+ return NULL;
+ }
+ free(buffer);
+ /* Now we have the ID of the referred-to object in
+ * actual_oid. Check again. */
+ }
+}
+
+static void write_object_file_prepare(const void *buf, unsigned long len,
+ const char *type, struct object_id *oid,
+ char *hdr, int *hdrlen)
+{
+ git_hash_ctx c;
+
+ /* Generate the header */
+ *hdrlen = xsnprintf(hdr, *hdrlen, "%s %lu", type, len)+1;
+
+ /* Sha1.. */
+ the_hash_algo->init_fn(&c);
+ the_hash_algo->update_fn(&c, hdr, *hdrlen);
+ the_hash_algo->update_fn(&c, buf, len);
+ the_hash_algo->final_fn(oid->hash, &c);
+}
+
+/*
+ * Move the just written object into its final resting place.
+ */
+int finalize_object_file(const char *tmpfile, const char *filename)
+{
+ int ret = 0;
+
+ if (object_creation_mode == OBJECT_CREATION_USES_RENAMES)
+ goto try_rename;
+ else if (link(tmpfile, filename))
+ ret = errno;
+
+ /*
+ * Coda hack - coda doesn't like cross-directory links,
+ * so we fall back to a rename, which will mean that it
+ * won't be able to check collisions, but that's not a
+ * big deal.
+ *
+ * The same holds for FAT formatted media.
+ *
+ * When this succeeds, we just return. We have nothing
+ * left to unlink.
+ */
+ if (ret && ret != EEXIST) {
+ try_rename:
+ if (!rename(tmpfile, filename))
+ goto out;
+ ret = errno;
+ }
+ unlink_or_warn(tmpfile);
+ if (ret) {
+ if (ret != EEXIST) {
+ return error_errno("unable to write sha1 filename %s", filename);
+ }
+ /* FIXME!!! Collision check here ? */
+ }
+
+out:
+ if (adjust_shared_perm(filename))
+ return error("unable to set permission to '%s'", filename);
+ return 0;
+}
+
+static int write_buffer(int fd, const void *buf, size_t len)
+{
+ if (write_in_full(fd, buf, len) < 0)
+ return error_errno("file write error");
+ return 0;
+}
+
+int hash_object_file(const void *buf, unsigned long len, const char *type,
+ struct object_id *oid)
+{
+ char hdr[MAX_HEADER_LEN];
+ int hdrlen = sizeof(hdr);
+ write_object_file_prepare(buf, len, type, oid, hdr, &hdrlen);
+ return 0;
+}
+
+/* Finalize a file on disk, and close it. */
+static void close_sha1_file(int fd)
+{
+ if (fsync_object_files)
+ fsync_or_die(fd, "sha1 file");
+ if (close(fd) != 0)
+ die_errno("error when closing sha1 file");
+}
+
+/* Size of directory component, including the ending '/' */
+static inline int directory_size(const char *filename)
+{
+ const char *s = strrchr(filename, '/');
+ if (!s)
+ return 0;
+ return s - filename + 1;
+}
+
+/*
+ * This creates a temporary file in the same directory as the final
+ * 'filename'
+ *
+ * We want to avoid cross-directory filename renames, because those
+ * can have problems on various filesystems (FAT, NFS, Coda).
+ */
+static int create_tmpfile(struct strbuf *tmp, const char *filename)
+{
+ int fd, dirlen = directory_size(filename);
+
+ strbuf_reset(tmp);
+ strbuf_add(tmp, filename, dirlen);
+ strbuf_addstr(tmp, "tmp_obj_XXXXXX");
+ fd = git_mkstemp_mode(tmp->buf, 0444);
+ if (fd < 0 && dirlen && errno == ENOENT) {
+ /*
+ * Make sure the directory exists; note that the contents
+ * of the buffer are undefined after mkstemp returns an
+ * error, so we have to rewrite the whole buffer from
+ * scratch.
+ */
+ strbuf_reset(tmp);
+ strbuf_add(tmp, filename, dirlen - 1);
+ if (mkdir(tmp->buf, 0777) && errno != EEXIST)
+ return -1;
+ if (adjust_shared_perm(tmp->buf))
+ return -1;
+
+ /* Try again */
+ strbuf_addstr(tmp, "/tmp_obj_XXXXXX");
+ fd = git_mkstemp_mode(tmp->buf, 0444);
+ }
+ return fd;
+}
+
+static int write_loose_object(const struct object_id *oid, char *hdr,
+ int hdrlen, const void *buf, unsigned long len,
+ time_t mtime)
+{
+ int fd, ret;
+ unsigned char compressed[4096];
+ git_zstream stream;
+ git_hash_ctx c;
+ struct object_id parano_oid;
+ static struct strbuf tmp_file = STRBUF_INIT;
+ static struct strbuf filename = STRBUF_INIT;
+
+ strbuf_reset(&filename);
+ sha1_file_name(the_repository, &filename, oid->hash);
+
+ fd = create_tmpfile(&tmp_file, filename.buf);
+ if (fd < 0) {
+ if (errno == EACCES)
+ return error("insufficient permission for adding an object to repository database %s", get_object_directory());
+ else
+ return error_errno("unable to create temporary file");
+ }
+
+ /* Set it up */
+ git_deflate_init(&stream, zlib_compression_level);
+ stream.next_out = compressed;
+ stream.avail_out = sizeof(compressed);
+ the_hash_algo->init_fn(&c);
+
+ /* First header.. */
+ stream.next_in = (unsigned char *)hdr;
+ stream.avail_in = hdrlen;
+ while (git_deflate(&stream, 0) == Z_OK)
+ ; /* nothing */
+ the_hash_algo->update_fn(&c, hdr, hdrlen);
+
+ /* Then the data itself.. */
+ stream.next_in = (void *)buf;
+ stream.avail_in = len;
+ do {
+ unsigned char *in0 = stream.next_in;
+ ret = git_deflate(&stream, Z_FINISH);
+ the_hash_algo->update_fn(&c, in0, stream.next_in - in0);
+ if (write_buffer(fd, compressed, stream.next_out - compressed) < 0)
+ die("unable to write sha1 file");
+ stream.next_out = compressed;
+ stream.avail_out = sizeof(compressed);
+ } while (ret == Z_OK);
+
+ if (ret != Z_STREAM_END)
+ die("unable to deflate new object %s (%d)", oid_to_hex(oid),
+ ret);
+ ret = git_deflate_end_gently(&stream);
+ if (ret != Z_OK)
+ die("deflateEnd on object %s failed (%d)", oid_to_hex(oid),
+ ret);
+ the_hash_algo->final_fn(parano_oid.hash, &c);
+ if (oidcmp(oid, ¶no_oid) != 0)
+ die("confused by unstable object source data for %s",
+ oid_to_hex(oid));
+
+ close_sha1_file(fd);
+
+ if (mtime) {
+ struct utimbuf utb;
+ utb.actime = mtime;
+ utb.modtime = mtime;
+ if (utime(tmp_file.buf, &utb) < 0)
+ warning_errno("failed utime() on %s", tmp_file.buf);
+ }
+
+ return finalize_object_file(tmp_file.buf, filename.buf);
+}
+
+static int freshen_loose_object(const unsigned char *sha1)
+{
+ return check_and_freshen(sha1, 1);
+}
+
+static int freshen_packed_object(const unsigned char *sha1)
+{
+ struct pack_entry e;
+ if (!find_pack_entry(the_repository, sha1, &e))
+ return 0;
+ if (e.p->freshened)
+ return 1;
+ if (!freshen_file(e.p->pack_name))
+ return 0;
+ e.p->freshened = 1;
+ return 1;
+}
+
+int write_object_file(const void *buf, unsigned long len, const char *type,
+ struct object_id *oid)
+{
+ char hdr[MAX_HEADER_LEN];
+ int hdrlen = sizeof(hdr);
+
+ /* Normally if we have it in the pack then we do not bother writing
+ * it out into .git/objects/??/?{38} file.
+ */
+ write_object_file_prepare(buf, len, type, oid, hdr, &hdrlen);
+ if (freshen_packed_object(oid->hash) || freshen_loose_object(oid->hash))
+ return 0;
+ return write_loose_object(oid, hdr, hdrlen, buf, len, 0);
+}
+
+int hash_object_file_literally(const void *buf, unsigned long len,
+ const char *type, struct object_id *oid,
+ unsigned flags)
+{
+ char *header;
+ int hdrlen, status = 0;
+
+ /* type string, SP, %lu of the length plus NUL must fit this */
+ hdrlen = strlen(type) + MAX_HEADER_LEN;
+ header = xmalloc(hdrlen);
+ write_object_file_prepare(buf, len, type, oid, header, &hdrlen);
+
+ if (!(flags & HASH_WRITE_OBJECT))
+ goto cleanup;
+ if (freshen_packed_object(oid->hash) || freshen_loose_object(oid->hash))
+ goto cleanup;
+ status = write_loose_object(oid, header, hdrlen, buf, len, 0);
+
+cleanup:
+ free(header);
+ return status;
+}
+
+int force_object_loose(const struct object_id *oid, time_t mtime)
+{
+ void *buf;
+ unsigned long len;
+ enum object_type type;
+ char hdr[MAX_HEADER_LEN];
+ int hdrlen;
+ int ret;
+
+ if (has_loose_object(oid->hash))
+ return 0;
+ buf = read_object(oid->hash, &type, &len);
+ if (!buf)
+ return error("cannot read sha1_file for %s", oid_to_hex(oid));
+ hdrlen = xsnprintf(hdr, sizeof(hdr), "%s %lu", type_name(type), len) + 1;
+ ret = write_loose_object(oid, hdr, hdrlen, buf, len, mtime);
+ free(buf);
+
+ return ret;
+}
+
+int has_sha1_file_with_flags(const unsigned char *sha1, int flags)
+{
+ struct object_id oid;
+ if (!startup_info->have_repository)
+ return 0;
+ hashcpy(oid.hash, sha1);
+ return oid_object_info_extended(&oid, NULL,
+ flags | OBJECT_INFO_SKIP_CACHED) >= 0;
+}
+
+int has_object_file(const struct object_id *oid)
+{
+ return has_sha1_file(oid->hash);
+}
+
+int has_object_file_with_flags(const struct object_id *oid, int flags)
+{
+ return has_sha1_file_with_flags(oid->hash, flags);
+}
+
+static void check_tree(const void *buf, size_t size)
+{
+ struct tree_desc desc;
+ struct name_entry entry;
+
+ init_tree_desc(&desc, buf, size);
+ while (tree_entry(&desc, &entry))
+ /* do nothing
+ * tree_entry() will die() on malformed entries */
+ ;
+}
+
+static void check_commit(const void *buf, size_t size)
+{
+ struct commit c;
+ memset(&c, 0, sizeof(c));
+ if (parse_commit_buffer(&c, buf, size))
+ die("corrupt commit");
+}
+
+static void check_tag(const void *buf, size_t size)
+{
+ struct tag t;
+ memset(&t, 0, sizeof(t));
+ if (parse_tag_buffer(&t, buf, size))
+ die("corrupt tag");
+}
+
+static int index_mem(struct object_id *oid, void *buf, size_t size,
+ enum object_type type,
+ const char *path, unsigned flags)
+{
+ int ret, re_allocated = 0;
+ int write_object = flags & HASH_WRITE_OBJECT;
+
+ if (!type)
+ type = OBJ_BLOB;
+
+ /*
+ * Convert blobs to git internal format
+ */
+ if ((type == OBJ_BLOB) && path) {
+ struct strbuf nbuf = STRBUF_INIT;
+ if (convert_to_git(&the_index, path, buf, size, &nbuf,
+ get_conv_flags(flags))) {
+ buf = strbuf_detach(&nbuf, &size);
+ re_allocated = 1;
+ }
+ }
+ if (flags & HASH_FORMAT_CHECK) {
+ if (type == OBJ_TREE)
+ check_tree(buf, size);
+ if (type == OBJ_COMMIT)
+ check_commit(buf, size);
+ if (type == OBJ_TAG)
+ check_tag(buf, size);
+ }
+
+ if (write_object)
+ ret = write_object_file(buf, size, type_name(type), oid);
+ else
+ ret = hash_object_file(buf, size, type_name(type), oid);
+ if (re_allocated)
+ free(buf);
+ return ret;
+}
+
+static int index_stream_convert_blob(struct object_id *oid, int fd,
+ const char *path, unsigned flags)
+{
+ int ret;
+ const int write_object = flags & HASH_WRITE_OBJECT;
+ struct strbuf sbuf = STRBUF_INIT;
+
+ assert(path);
+ assert(would_convert_to_git_filter_fd(path));
+
+ convert_to_git_filter_fd(&the_index, path, fd, &sbuf,
+ get_conv_flags(flags));
+
+ if (write_object)
+ ret = write_object_file(sbuf.buf, sbuf.len, type_name(OBJ_BLOB),
+ oid);
+ else
+ ret = hash_object_file(sbuf.buf, sbuf.len, type_name(OBJ_BLOB),
+ oid);
+ strbuf_release(&sbuf);
+ return ret;
+}
+
+static int index_pipe(struct object_id *oid, int fd, enum object_type type,
+ const char *path, unsigned flags)
+{
+ struct strbuf sbuf = STRBUF_INIT;
+ int ret;
+
+ if (strbuf_read(&sbuf, fd, 4096) >= 0)
+ ret = index_mem(oid, sbuf.buf, sbuf.len, type, path, flags);
+ else
+ ret = -1;
+ strbuf_release(&sbuf);
+ return ret;
+}
+
+#define SMALL_FILE_SIZE (32*1024)
+
+static int index_core(struct object_id *oid, int fd, size_t size,
+ enum object_type type, const char *path,
+ unsigned flags)
+{
+ int ret;
+
+ if (!size) {
+ ret = index_mem(oid, "", size, type, path, flags);
+ } else if (size <= SMALL_FILE_SIZE) {
+ char *buf = xmalloc(size);
+ ssize_t read_result = read_in_full(fd, buf, size);
+ if (read_result < 0)
+ ret = error_errno("read error while indexing %s",
+ path ? path : "<unknown>");
+ else if (read_result != size)
+ ret = error("short read while indexing %s",
+ path ? path : "<unknown>");
+ else
+ ret = index_mem(oid, buf, size, type, path, flags);
+ free(buf);
+ } else {
+ void *buf = xmmap(NULL, size, PROT_READ, MAP_PRIVATE, fd, 0);
+ ret = index_mem(oid, buf, size, type, path, flags);
+ munmap(buf, size);
+ }
+ return ret;
+}
+
+/*
+ * This creates one packfile per large blob unless bulk-checkin
+ * machinery is "plugged".
+ *
+ * This also bypasses the usual "convert-to-git" dance, and that is on
+ * purpose. We could write a streaming version of the converting
+ * functions and insert that before feeding the data to fast-import
+ * (or equivalent in-core API described above). However, that is
+ * somewhat complicated, as we do not know the size of the filter
+ * result, which we need to know beforehand when writing a git object.
+ * Since the primary motivation for trying to stream from the working
+ * tree file and to avoid mmaping it in core is to deal with large
+ * binary blobs, they generally do not want to get any conversion, and
+ * callers should avoid this code path when filters are requested.
+ */
+static int index_stream(struct object_id *oid, int fd, size_t size,
+ enum object_type type, const char *path,
+ unsigned flags)
+{
+ return index_bulk_checkin(oid, fd, size, type, path, flags);
+}
+
+int index_fd(struct object_id *oid, int fd, struct stat *st,
+ enum object_type type, const char *path, unsigned flags)
+{
+ int ret;
+
+ /*
+ * Call xsize_t() only when needed to avoid potentially unnecessary
+ * die() for large files.
+ */
+ if (type == OBJ_BLOB && path && would_convert_to_git_filter_fd(path))
+ ret = index_stream_convert_blob(oid, fd, path, flags);
+ else if (!S_ISREG(st->st_mode))
+ ret = index_pipe(oid, fd, type, path, flags);
+ else if (st->st_size <= big_file_threshold || type != OBJ_BLOB ||
+ (path && would_convert_to_git(&the_index, path)))
+ ret = index_core(oid, fd, xsize_t(st->st_size), type, path,
+ flags);
+ else
+ ret = index_stream(oid, fd, xsize_t(st->st_size), type, path,
+ flags);
+ close(fd);
+ return ret;
+}
+
+int index_path(struct object_id *oid, const char *path, struct stat *st, unsigned flags)
+{
+ int fd;
+ struct strbuf sb = STRBUF_INIT;
+ int rc = 0;
+
+ switch (st->st_mode & S_IFMT) {
+ case S_IFREG:
+ fd = open(path, O_RDONLY);
+ if (fd < 0)
+ return error_errno("open(\"%s\")", path);
+ if (index_fd(oid, fd, st, OBJ_BLOB, path, flags) < 0)
+ return error("%s: failed to insert into database",
+ path);
+ break;
+ case S_IFLNK:
+ if (strbuf_readlink(&sb, path, st->st_size))
+ return error_errno("readlink(\"%s\")", path);
+ if (!(flags & HASH_WRITE_OBJECT))
+ hash_object_file(sb.buf, sb.len, blob_type, oid);
+ else if (write_object_file(sb.buf, sb.len, blob_type, oid))
+ rc = error("%s: failed to insert into database", path);
+ strbuf_release(&sb);
+ break;
+ case S_IFDIR:
+ return resolve_gitlink_ref(path, "HEAD", oid);
+ default:
+ return error("%s: unsupported file type", path);
+ }
+ return rc;
+}
+
+int read_pack_header(int fd, struct pack_header *header)
+{
+ if (read_in_full(fd, header, sizeof(*header)) != sizeof(*header))
+ /* "eof before pack header was fully read" */
+ return PH_ERROR_EOF;
+
+ if (header->hdr_signature != htonl(PACK_SIGNATURE))
+ /* "protocol error (pack signature mismatch detected)" */
+ return PH_ERROR_PACK_SIGNATURE;
+ if (!pack_version_ok(header->hdr_version))
+ /* "protocol error (pack version unsupported)" */
+ return PH_ERROR_PROTOCOL;
+ return 0;
+}
+
+void assert_oid_type(const struct object_id *oid, enum object_type expect)
+{
+ enum object_type type = oid_object_info(oid, NULL);
+ if (type < 0)
+ die("%s is not a valid object", oid_to_hex(oid));
+ if (type != expect)
+ die("%s is not a valid '%s' object", oid_to_hex(oid),
+ type_name(expect));
+}
+
+int for_each_file_in_obj_subdir(unsigned int subdir_nr,
+ struct strbuf *path,
+ each_loose_object_fn obj_cb,
+ each_loose_cruft_fn cruft_cb,
+ each_loose_subdir_fn subdir_cb,
+ void *data)
+{
+ size_t origlen, baselen;
+ DIR *dir;
+ struct dirent *de;
+ int r = 0;
+ struct object_id oid;
+
+ if (subdir_nr > 0xff)
+ BUG("invalid loose object subdirectory: %x", subdir_nr);
+
+ origlen = path->len;
+ strbuf_complete(path, '/');
+ strbuf_addf(path, "%02x", subdir_nr);
+
+ dir = opendir(path->buf);
+ if (!dir) {
+ if (errno != ENOENT)
+ r = error_errno("unable to open %s", path->buf);
+ strbuf_setlen(path, origlen);
+ return r;
+ }
+
+ oid.hash[0] = subdir_nr;
+ strbuf_addch(path, '/');
+ baselen = path->len;
+
+ while ((de = readdir(dir))) {
+ size_t namelen;
+ if (is_dot_or_dotdot(de->d_name))
+ continue;
+
+ namelen = strlen(de->d_name);
+ strbuf_setlen(path, baselen);
+ strbuf_add(path, de->d_name, namelen);
+ if (namelen == GIT_SHA1_HEXSZ - 2 &&
+ !hex_to_bytes(oid.hash + 1, de->d_name,
+ GIT_SHA1_RAWSZ - 1)) {
+ if (obj_cb) {
+ r = obj_cb(&oid, path->buf, data);
+ if (r)
+ break;
+ }
+ continue;
+ }
+
+ if (cruft_cb) {
+ r = cruft_cb(de->d_name, path->buf, data);
+ if (r)
+ break;
+ }
+ }
+ closedir(dir);
+
+ strbuf_setlen(path, baselen - 1);
+ if (!r && subdir_cb)
+ r = subdir_cb(subdir_nr, path->buf, data);
+
+ strbuf_setlen(path, origlen);
+
+ return r;
+}
+
+int for_each_loose_file_in_objdir_buf(struct strbuf *path,
+ each_loose_object_fn obj_cb,
+ each_loose_cruft_fn cruft_cb,
+ each_loose_subdir_fn subdir_cb,
+ void *data)
+{
+ int r = 0;
+ int i;
+
+ for (i = 0; i < 256; i++) {
+ r = for_each_file_in_obj_subdir(i, path, obj_cb, cruft_cb,
+ subdir_cb, data);
+ if (r)
+ break;
+ }
+
+ return r;
+}
+
+int for_each_loose_file_in_objdir(const char *path,
+ each_loose_object_fn obj_cb,
+ each_loose_cruft_fn cruft_cb,
+ each_loose_subdir_fn subdir_cb,
+ void *data)
+{
+ struct strbuf buf = STRBUF_INIT;
+ int r;
+
+ strbuf_addstr(&buf, path);
+ r = for_each_loose_file_in_objdir_buf(&buf, obj_cb, cruft_cb,
+ subdir_cb, data);
+ strbuf_release(&buf);
+
+ return r;
+}
+
+struct loose_alt_odb_data {
+ each_loose_object_fn *cb;
+ void *data;
+};
+
+static int loose_from_alt_odb(struct alternate_object_database *alt,
+ void *vdata)
+{
+ struct loose_alt_odb_data *data = vdata;
+ struct strbuf buf = STRBUF_INIT;
+ int r;
+
+ strbuf_addstr(&buf, alt->path);
+ r = for_each_loose_file_in_objdir_buf(&buf,
+ data->cb, NULL, NULL,
+ data->data);
+ strbuf_release(&buf);
+ return r;
+}
+
+int for_each_loose_object(each_loose_object_fn cb, void *data, unsigned flags)
+{
+ struct loose_alt_odb_data alt;
+ int r;
+
+ r = for_each_loose_file_in_objdir(get_object_directory(),
+ cb, NULL, NULL, data);
+ if (r)
+ return r;
+
+ if (flags & FOR_EACH_OBJECT_LOCAL_ONLY)
+ return 0;
+
+ alt.cb = cb;
+ alt.data = data;
+ return foreach_alt_odb(loose_from_alt_odb, &alt);
+}
+
+static int check_stream_sha1(git_zstream *stream,
+ const char *hdr,
+ unsigned long size,
+ const char *path,
+ const unsigned char *expected_sha1)
+{
+ git_hash_ctx c;
+ unsigned char real_sha1[GIT_MAX_RAWSZ];
+ unsigned char buf[4096];
+ unsigned long total_read;
+ int status = Z_OK;
+
+ the_hash_algo->init_fn(&c);
+ the_hash_algo->update_fn(&c, hdr, stream->total_out);
+
+ /*
+ * We already read some bytes into hdr, but the ones up to the NUL
+ * do not count against the object's content size.
+ */
+ total_read = stream->total_out - strlen(hdr) - 1;
+
+ /*
+ * This size comparison must be "<=" to read the final zlib packets;
+ * see the comment in unpack_sha1_rest for details.
+ */
+ while (total_read <= size &&
+ (status == Z_OK || status == Z_BUF_ERROR)) {
+ stream->next_out = buf;
+ stream->avail_out = sizeof(buf);
+ if (size - total_read < stream->avail_out)
+ stream->avail_out = size - total_read;
+ status = git_inflate(stream, Z_FINISH);
+ the_hash_algo->update_fn(&c, buf, stream->next_out - buf);
+ total_read += stream->next_out - buf;
+ }
+ git_inflate_end(stream);
+
+ if (status != Z_STREAM_END) {
+ error("corrupt loose object '%s'", sha1_to_hex(expected_sha1));
+ return -1;
+ }
+ if (stream->avail_in) {
+ error("garbage at end of loose object '%s'",
+ sha1_to_hex(expected_sha1));
+ return -1;
+ }
+
+ the_hash_algo->final_fn(real_sha1, &c);
+ if (hashcmp(expected_sha1, real_sha1)) {
+ error("sha1 mismatch for %s (expected %s)", path,
+ sha1_to_hex(expected_sha1));
+ return -1;
+ }
+
+ return 0;
+}
+
+int read_loose_object(const char *path,
+ const struct object_id *expected_oid,
+ enum object_type *type,
+ unsigned long *size,
+ void **contents)
+{
+ int ret = -1;
+ void *map = NULL;
+ unsigned long mapsize;
+ git_zstream stream;
+ char hdr[MAX_HEADER_LEN];
+
+ *contents = NULL;
+
+ map = map_sha1_file_1(the_repository, path, NULL, &mapsize);
+ if (!map) {
+ error_errno("unable to mmap %s", path);
+ goto out;
+ }
+
+ if (unpack_sha1_header(&stream, map, mapsize, hdr, sizeof(hdr)) < 0) {
+ error("unable to unpack header of %s", path);
+ goto out;
+ }
+
+ *type = parse_sha1_header(hdr, size);
+ if (*type < 0) {
+ error("unable to parse header of %s", path);
+ git_inflate_end(&stream);
+ goto out;
+ }
+
+ if (*type == OBJ_BLOB) {
+ if (check_stream_sha1(&stream, hdr, *size, path, expected_oid->hash) < 0)
+ goto out;
+ } else {
+ *contents = unpack_sha1_rest(&stream, hdr, *size, expected_oid->hash);
+ if (!*contents) {
+ error("unable to unpack contents of %s", path);
+ git_inflate_end(&stream);
+ goto out;
+ }
+ if (check_object_signature(expected_oid, *contents,
+ *size, type_name(*type))) {
+ error("sha1 mismatch for %s (expected %s)", path,
+ oid_to_hex(expected_oid));
+ free(*contents);
+ goto out;
+ }
+ }
+
+ ret = 0; /* everything checks out */
+
+out:
+ if (map)
+ munmap(map, mapsize);
+ return ret;
+}
--- /dev/null
+#include "cache.h"
+#include "config.h"
+#include "tag.h"
+#include "commit.h"
+#include "tree.h"
+#include "blob.h"
+#include "tree-walk.h"
+#include "refs.h"
+#include "remote.h"
+#include "dir.h"
+#include "sha1-array.h"
+#include "packfile.h"
+#include "object-store.h"
+#include "repository.h"
+
+static int get_oid_oneline(const char *, struct object_id *, struct commit_list *);
+
+typedef int (*disambiguate_hint_fn)(const struct object_id *, void *);
+
+struct disambiguate_state {
+ int len; /* length of prefix in hex chars */
+ char hex_pfx[GIT_MAX_HEXSZ + 1];
+ struct object_id bin_pfx;
+
+ disambiguate_hint_fn fn;
+ void *cb_data;
+ struct object_id candidate;
+ unsigned candidate_exists:1;
+ unsigned candidate_checked:1;
+ unsigned candidate_ok:1;
+ unsigned disambiguate_fn_used:1;
+ unsigned ambiguous:1;
+ unsigned always_call_fn:1;
+};
+
+static void update_candidates(struct disambiguate_state *ds, const struct object_id *current)
+{
+ if (ds->always_call_fn) {
+ ds->ambiguous = ds->fn(current, ds->cb_data) ? 1 : 0;
+ return;
+ }
+ if (!ds->candidate_exists) {
+ /* this is the first candidate */
+ oidcpy(&ds->candidate, current);
+ ds->candidate_exists = 1;
+ return;
+ } else if (!oidcmp(&ds->candidate, current)) {
+ /* the same as what we already have seen */
+ return;
+ }
+
+ if (!ds->fn) {
+ /* cannot disambiguate between ds->candidate and current */
+ ds->ambiguous = 1;
+ return;
+ }
+
+ if (!ds->candidate_checked) {
+ ds->candidate_ok = ds->fn(&ds->candidate, ds->cb_data);
+ ds->disambiguate_fn_used = 1;
+ ds->candidate_checked = 1;
+ }
+
+ if (!ds->candidate_ok) {
+ /* discard the candidate; we know it does not satisfy fn */
+ oidcpy(&ds->candidate, current);
+ ds->candidate_checked = 0;
+ return;
+ }
+
+ /* if we reach this point, we know ds->candidate satisfies fn */
+ if (ds->fn(current, ds->cb_data)) {
+ /*
+ * if both current and candidate satisfy fn, we cannot
+ * disambiguate.
+ */
+ ds->candidate_ok = 0;
+ ds->ambiguous = 1;
+ }
+
+ /* otherwise, current can be discarded and candidate is still good */
+}
+
+static int append_loose_object(const struct object_id *oid, const char *path,
+ void *data)
+{
+ oid_array_append(data, oid);
+ return 0;
+}
+
+static int match_sha(unsigned, const unsigned char *, const unsigned char *);
+
+static void find_short_object_filename(struct disambiguate_state *ds)
+{
+ int subdir_nr = ds->bin_pfx.hash[0];
+ struct alternate_object_database *alt;
+ static struct alternate_object_database *fakeent;
+
+ if (!fakeent) {
+ /*
+ * Create a "fake" alternate object database that
+ * points to our own object database, to make it
+ * easier to get a temporary working space in
+ * alt->name/alt->base while iterating over the
+ * object databases including our own.
+ */
+ fakeent = alloc_alt_odb(get_object_directory());
+ }
+ fakeent->next = the_repository->objects->alt_odb_list;
+
+ for (alt = fakeent; alt && !ds->ambiguous; alt = alt->next) {
+ int pos;
+
+ if (!alt->loose_objects_subdir_seen[subdir_nr]) {
+ struct strbuf *buf = alt_scratch_buf(alt);
+ for_each_file_in_obj_subdir(subdir_nr, buf,
+ append_loose_object,
+ NULL, NULL,
+ &alt->loose_objects_cache);
+ alt->loose_objects_subdir_seen[subdir_nr] = 1;
+ }
+
+ pos = oid_array_lookup(&alt->loose_objects_cache, &ds->bin_pfx);
+ if (pos < 0)
+ pos = -1 - pos;
+ while (!ds->ambiguous && pos < alt->loose_objects_cache.nr) {
+ const struct object_id *oid;
+ oid = alt->loose_objects_cache.oid + pos;
+ if (!match_sha(ds->len, ds->bin_pfx.hash, oid->hash))
+ break;
+ update_candidates(ds, oid);
+ pos++;
+ }
+ }
+}
+
+static int match_sha(unsigned len, const unsigned char *a, const unsigned char *b)
+{
+ do {
+ if (*a != *b)
+ return 0;
+ a++;
+ b++;
+ len -= 2;
+ } while (len > 1);
+ if (len)
+ if ((*a ^ *b) & 0xf0)
+ return 0;
+ return 1;
+}
+
+static void unique_in_pack(struct packed_git *p,
+ struct disambiguate_state *ds)
+{
+ uint32_t num, i, first = 0;
+ const struct object_id *current = NULL;
+
+ if (open_pack_index(p) || !p->num_objects)
+ return;
+
+ num = p->num_objects;
+ bsearch_pack(&ds->bin_pfx, p, &first);
+
+ /*
+ * At this point, "first" is the location of the lowest object
+ * with an object name that could match "bin_pfx". See if we have
+ * 0, 1 or more objects that actually match(es).
+ */
+ for (i = first; i < num && !ds->ambiguous; i++) {
+ struct object_id oid;
+ current = nth_packed_object_oid(&oid, p, i);
+ if (!match_sha(ds->len, ds->bin_pfx.hash, current->hash))
+ break;
+ update_candidates(ds, current);
+ }
+}
+
+static void find_short_packed_object(struct disambiguate_state *ds)
+{
+ struct packed_git *p;
+
+ for (p = get_packed_git(the_repository); p && !ds->ambiguous;
+ p = p->next)
+ unique_in_pack(p, ds);
+}
+
+#define SHORT_NAME_NOT_FOUND (-1)
+#define SHORT_NAME_AMBIGUOUS (-2)
+
+static int finish_object_disambiguation(struct disambiguate_state *ds,
+ struct object_id *oid)
+{
+ if (ds->ambiguous)
+ return SHORT_NAME_AMBIGUOUS;
+
+ if (!ds->candidate_exists)
+ return SHORT_NAME_NOT_FOUND;
+
+ if (!ds->candidate_checked)
+ /*
+ * If this is the only candidate, there is no point
+ * calling the disambiguation hint callback.
+ *
+ * On the other hand, if the current candidate
+ * replaced an earlier candidate that did _not_ pass
+ * the disambiguation hint callback, then we do have
+ * more than one objects that match the short name
+ * given, so we should make sure this one matches;
+ * otherwise, if we discovered this one and the one
+ * that we previously discarded in the reverse order,
+ * we would end up showing different results in the
+ * same repository!
+ */
+ ds->candidate_ok = (!ds->disambiguate_fn_used ||
+ ds->fn(&ds->candidate, ds->cb_data));
+
+ if (!ds->candidate_ok)
+ return SHORT_NAME_AMBIGUOUS;
+
+ oidcpy(oid, &ds->candidate);
+ return 0;
+}
+
+static int disambiguate_commit_only(const struct object_id *oid, void *cb_data_unused)
+{
+ int kind = oid_object_info(oid, NULL);
+ return kind == OBJ_COMMIT;
+}
+
+static int disambiguate_committish_only(const struct object_id *oid, void *cb_data_unused)
+{
+ struct object *obj;
+ int kind;
+
+ kind = oid_object_info(oid, NULL);
+ if (kind == OBJ_COMMIT)
+ return 1;
+ if (kind != OBJ_TAG)
+ return 0;
+
+ /* We need to do this the hard way... */
+ obj = deref_tag(parse_object(oid), NULL, 0);
+ if (obj && obj->type == OBJ_COMMIT)
+ return 1;
+ return 0;
+}
+
+static int disambiguate_tree_only(const struct object_id *oid, void *cb_data_unused)
+{
+ int kind = oid_object_info(oid, NULL);
+ return kind == OBJ_TREE;
+}
+
+static int disambiguate_treeish_only(const struct object_id *oid, void *cb_data_unused)
+{
+ struct object *obj;
+ int kind;
+
+ kind = oid_object_info(oid, NULL);
+ if (kind == OBJ_TREE || kind == OBJ_COMMIT)
+ return 1;
+ if (kind != OBJ_TAG)
+ return 0;
+
+ /* We need to do this the hard way... */
+ obj = deref_tag(parse_object(oid), NULL, 0);
+ if (obj && (obj->type == OBJ_TREE || obj->type == OBJ_COMMIT))
+ return 1;
+ return 0;
+}
+
+static int disambiguate_blob_only(const struct object_id *oid, void *cb_data_unused)
+{
+ int kind = oid_object_info(oid, NULL);
+ return kind == OBJ_BLOB;
+}
+
+static disambiguate_hint_fn default_disambiguate_hint;
+
+int set_disambiguate_hint_config(const char *var, const char *value)
+{
+ static const struct {
+ const char *name;
+ disambiguate_hint_fn fn;
+ } hints[] = {
+ { "none", NULL },
+ { "commit", disambiguate_commit_only },
+ { "committish", disambiguate_committish_only },
+ { "tree", disambiguate_tree_only },
+ { "treeish", disambiguate_treeish_only },
+ { "blob", disambiguate_blob_only }
+ };
+ int i;
+
+ if (!value)
+ return config_error_nonbool(var);
+
+ for (i = 0; i < ARRAY_SIZE(hints); i++) {
+ if (!strcasecmp(value, hints[i].name)) {
+ default_disambiguate_hint = hints[i].fn;
+ return 0;
+ }
+ }
+
+ return error("unknown hint type for '%s': %s", var, value);
+}
+
+static int init_object_disambiguation(const char *name, int len,
+ struct disambiguate_state *ds)
+{
+ int i;
+
+ if (len < MINIMUM_ABBREV || len > GIT_SHA1_HEXSZ)
+ return -1;
+
+ memset(ds, 0, sizeof(*ds));
+
+ for (i = 0; i < len ;i++) {
+ unsigned char c = name[i];
+ unsigned char val;
+ if (c >= '0' && c <= '9')
+ val = c - '0';
+ else if (c >= 'a' && c <= 'f')
+ val = c - 'a' + 10;
+ else if (c >= 'A' && c <='F') {
+ val = c - 'A' + 10;
+ c -= 'A' - 'a';
+ }
+ else
+ return -1;
+ ds->hex_pfx[i] = c;
+ if (!(i & 1))
+ val <<= 4;
+ ds->bin_pfx.hash[i >> 1] |= val;
+ }
+
+ ds->len = len;
+ ds->hex_pfx[len] = '\0';
+ prepare_alt_odb(the_repository);
+ return 0;
+}
+
+static int show_ambiguous_object(const struct object_id *oid, void *data)
+{
+ const struct disambiguate_state *ds = data;
+ struct strbuf desc = STRBUF_INIT;
+ int type;
+
+
+ if (ds->fn && !ds->fn(oid, ds->cb_data))
+ return 0;
+
+ type = oid_object_info(oid, NULL);
+ if (type == OBJ_COMMIT) {
+ struct commit *commit = lookup_commit(oid);
+ if (commit) {
+ struct pretty_print_context pp = {0};
+ pp.date_mode.type = DATE_SHORT;
+ format_commit_message(commit, " %ad - %s", &desc, &pp);
+ }
+ } else if (type == OBJ_TAG) {
+ struct tag *tag = lookup_tag(oid);
+ if (!parse_tag(tag) && tag->tag)
+ strbuf_addf(&desc, " %s", tag->tag);
+ }
+
+ advise(" %s %s%s",
+ find_unique_abbrev(oid, DEFAULT_ABBREV),
+ type_name(type) ? type_name(type) : "unknown type",
+ desc.buf);
+
+ strbuf_release(&desc);
+ return 0;
+}
+
+static int get_short_oid(const char *name, int len, struct object_id *oid,
+ unsigned flags)
+{
+ int status;
+ struct disambiguate_state ds;
+ int quietly = !!(flags & GET_OID_QUIETLY);
+
+ if (init_object_disambiguation(name, len, &ds) < 0)
+ return -1;
+
+ if (HAS_MULTI_BITS(flags & GET_OID_DISAMBIGUATORS))
+ die("BUG: multiple get_short_oid disambiguator flags");
+
+ if (flags & GET_OID_COMMIT)
+ ds.fn = disambiguate_commit_only;
+ else if (flags & GET_OID_COMMITTISH)
+ ds.fn = disambiguate_committish_only;
+ else if (flags & GET_OID_TREE)
+ ds.fn = disambiguate_tree_only;
+ else if (flags & GET_OID_TREEISH)
+ ds.fn = disambiguate_treeish_only;
+ else if (flags & GET_OID_BLOB)
+ ds.fn = disambiguate_blob_only;
+ else
+ ds.fn = default_disambiguate_hint;
+
+ find_short_object_filename(&ds);
+ find_short_packed_object(&ds);
+ status = finish_object_disambiguation(&ds, oid);
+
+ if (!quietly && (status == SHORT_NAME_AMBIGUOUS)) {
+ error(_("short SHA1 %s is ambiguous"), ds.hex_pfx);
+
+ /*
+ * We may still have ambiguity if we simply saw a series of
+ * candidates that did not satisfy our hint function. In
+ * that case, we still want to show them, so disable the hint
+ * function entirely.
+ */
+ if (!ds.ambiguous)
+ ds.fn = NULL;
+
+ advise(_("The candidates are:"));
+ for_each_abbrev(ds.hex_pfx, show_ambiguous_object, &ds);
+ }
+
+ return status;
+}
+
+static int collect_ambiguous(const struct object_id *oid, void *data)
+{
+ oid_array_append(data, oid);
+ return 0;
+}
+
+int for_each_abbrev(const char *prefix, each_abbrev_fn fn, void *cb_data)
+{
+ struct oid_array collect = OID_ARRAY_INIT;
+ struct disambiguate_state ds;
+ int ret;
+
+ if (init_object_disambiguation(prefix, strlen(prefix), &ds) < 0)
+ return -1;
+
+ ds.always_call_fn = 1;
+ ds.fn = collect_ambiguous;
+ ds.cb_data = &collect;
+ find_short_object_filename(&ds);
+ find_short_packed_object(&ds);
+
+ ret = oid_array_for_each_unique(&collect, fn, cb_data);
+ oid_array_clear(&collect);
+ return ret;
+}
+
+/*
+ * Return the slot of the most-significant bit set in "val". There are various
+ * ways to do this quickly with fls() or __builtin_clzl(), but speed is
+ * probably not a big deal here.
+ */
+static unsigned msb(unsigned long val)
+{
+ unsigned r = 0;
+ while (val >>= 1)
+ r++;
+ return r;
+}
+
+struct min_abbrev_data {
+ unsigned int init_len;
+ unsigned int cur_len;
+ char *hex;
+ const struct object_id *oid;
+};
+
+static inline char get_hex_char_from_oid(const struct object_id *oid,
+ unsigned int pos)
+{
+ static const char hex[] = "0123456789abcdef";
+
+ if ((pos & 1) == 0)
+ return hex[oid->hash[pos >> 1] >> 4];
+ else
+ return hex[oid->hash[pos >> 1] & 0xf];
+}
+
+static int extend_abbrev_len(const struct object_id *oid, void *cb_data)
+{
+ struct min_abbrev_data *mad = cb_data;
+
+ unsigned int i = mad->init_len;
+ while (mad->hex[i] && mad->hex[i] == get_hex_char_from_oid(oid, i))
+ i++;
+
+ if (i < GIT_MAX_RAWSZ && i >= mad->cur_len)
+ mad->cur_len = i + 1;
+
+ return 0;
+}
+
+static void find_abbrev_len_for_pack(struct packed_git *p,
+ struct min_abbrev_data *mad)
+{
+ int match = 0;
+ uint32_t num, first = 0;
+ struct object_id oid;
+ const struct object_id *mad_oid;
+
+ if (open_pack_index(p) || !p->num_objects)
+ return;
+
+ num = p->num_objects;
+ mad_oid = mad->oid;
+ match = bsearch_pack(mad_oid, p, &first);
+
+ /*
+ * first is now the position in the packfile where we would insert
+ * mad->hash if it does not exist (or the position of mad->hash if
+ * it does exist). Hence, we consider a maximum of two objects
+ * nearby for the abbreviation length.
+ */
+ mad->init_len = 0;
+ if (!match) {
+ if (nth_packed_object_oid(&oid, p, first))
+ extend_abbrev_len(&oid, mad);
+ } else if (first < num - 1) {
+ if (nth_packed_object_oid(&oid, p, first + 1))
+ extend_abbrev_len(&oid, mad);
+ }
+ if (first > 0) {
+ if (nth_packed_object_oid(&oid, p, first - 1))
+ extend_abbrev_len(&oid, mad);
+ }
+ mad->init_len = mad->cur_len;
+}
+
+static void find_abbrev_len_packed(struct min_abbrev_data *mad)
+{
+ struct packed_git *p;
+
+ for (p = get_packed_git(the_repository); p; p = p->next)
+ find_abbrev_len_for_pack(p, mad);
+}
+
+int find_unique_abbrev_r(char *hex, const struct object_id *oid, int len)
+{
+ struct disambiguate_state ds;
+ struct min_abbrev_data mad;
+ struct object_id oid_ret;
+ if (len < 0) {
+ unsigned long count = approximate_object_count();
+ /*
+ * Add one because the MSB only tells us the highest bit set,
+ * not including the value of all the _other_ bits (so "15"
+ * is only one off of 2^4, but the MSB is the 3rd bit.
+ */
+ len = msb(count) + 1;
+ /*
+ * We now know we have on the order of 2^len objects, which
+ * expects a collision at 2^(len/2). But we also care about hex
+ * chars, not bits, and there are 4 bits per hex. So all
+ * together we need to divide by 2 and round up.
+ */
+ len = DIV_ROUND_UP(len, 2);
+ /*
+ * For very small repos, we stick with our regular fallback.
+ */
+ if (len < FALLBACK_DEFAULT_ABBREV)
+ len = FALLBACK_DEFAULT_ABBREV;
+ }
+
+ oid_to_hex_r(hex, oid);
+ if (len == GIT_SHA1_HEXSZ || !len)
+ return GIT_SHA1_HEXSZ;
+
+ mad.init_len = len;
+ mad.cur_len = len;
+ mad.hex = hex;
+ mad.oid = oid;
+
+ find_abbrev_len_packed(&mad);
+
+ if (init_object_disambiguation(hex, mad.cur_len, &ds) < 0)
+ return -1;
+
+ ds.fn = extend_abbrev_len;
+ ds.always_call_fn = 1;
+ ds.cb_data = (void *)&mad;
+
+ find_short_object_filename(&ds);
+ (void)finish_object_disambiguation(&ds, &oid_ret);
+
+ hex[mad.cur_len] = 0;
+ return mad.cur_len;
+}
+
+const char *find_unique_abbrev(const struct object_id *oid, int len)
+{
+ static int bufno;
+ static char hexbuffer[4][GIT_MAX_HEXSZ + 1];
+ char *hex = hexbuffer[bufno];
+ bufno = (bufno + 1) % ARRAY_SIZE(hexbuffer);
+ find_unique_abbrev_r(hex, oid, len);
+ return hex;
+}
+
+static int ambiguous_path(const char *path, int len)
+{
+ int slash = 1;
+ int cnt;
+
+ for (cnt = 0; cnt < len; cnt++) {
+ switch (*path++) {
+ case '\0':
+ break;
+ case '/':
+ if (slash)
+ break;
+ slash = 1;
+ continue;
+ case '.':
+ continue;
+ default:
+ slash = 0;
+ continue;
+ }
+ break;
+ }
+ return slash;
+}
+
+static inline int at_mark(const char *string, int len,
+ const char **suffix, int nr)
+{
+ int i;
+
+ for (i = 0; i < nr; i++) {
+ int suffix_len = strlen(suffix[i]);
+ if (suffix_len <= len
+ && !strncasecmp(string, suffix[i], suffix_len))
+ return suffix_len;
+ }
+ return 0;
+}
+
+static inline int upstream_mark(const char *string, int len)
+{
+ const char *suffix[] = { "@{upstream}", "@{u}" };
+ return at_mark(string, len, suffix, ARRAY_SIZE(suffix));
+}
+
+static inline int push_mark(const char *string, int len)
+{
+ const char *suffix[] = { "@{push}" };
+ return at_mark(string, len, suffix, ARRAY_SIZE(suffix));
+}
+
+static int get_oid_1(const char *name, int len, struct object_id *oid, unsigned lookup_flags);
+static int interpret_nth_prior_checkout(const char *name, int namelen, struct strbuf *buf);
+
+static int get_oid_basic(const char *str, int len, struct object_id *oid,
+ unsigned int flags)
+{
+ static const char *warn_msg = "refname '%.*s' is ambiguous.";
+ static const char *object_name_msg = N_(
+ "Git normally never creates a ref that ends with 40 hex characters\n"
+ "because it will be ignored when you just specify 40-hex. These refs\n"
+ "may be created by mistake. For example,\n"
+ "\n"
+ " git checkout -b $br $(git rev-parse ...)\n"
+ "\n"
+ "where \"$br\" is somehow empty and a 40-hex ref is created. Please\n"
+ "examine these refs and maybe delete them. Turn this message off by\n"
+ "running \"git config advice.objectNameWarning false\"");
+ struct object_id tmp_oid;
+ char *real_ref = NULL;
+ int refs_found = 0;
+ int at, reflog_len, nth_prior = 0;
+
+ if (len == GIT_SHA1_HEXSZ && !get_oid_hex(str, oid)) {
+ if (warn_ambiguous_refs && warn_on_object_refname_ambiguity) {
+ refs_found = dwim_ref(str, len, &tmp_oid, &real_ref);
+ if (refs_found > 0) {
+ warning(warn_msg, len, str);
+ if (advice_object_name_warning)
+ fprintf(stderr, "%s\n", _(object_name_msg));
+ }
+ free(real_ref);
+ }
+ return 0;
+ }
+
+ /* basic@{time or number or -number} format to query ref-log */
+ reflog_len = at = 0;
+ if (len && str[len-1] == '}') {
+ for (at = len-4; at >= 0; at--) {
+ if (str[at] == '@' && str[at+1] == '{') {
+ if (str[at+2] == '-') {
+ if (at != 0)
+ /* @{-N} not at start */
+ return -1;
+ nth_prior = 1;
+ continue;
+ }
+ if (!upstream_mark(str + at, len - at) &&
+ !push_mark(str + at, len - at)) {
+ reflog_len = (len-1) - (at+2);
+ len = at;
+ }
+ break;
+ }
+ }
+ }
+
+ /* Accept only unambiguous ref paths. */
+ if (len && ambiguous_path(str, len))
+ return -1;
+
+ if (nth_prior) {
+ struct strbuf buf = STRBUF_INIT;
+ int detached;
+
+ if (interpret_nth_prior_checkout(str, len, &buf) > 0) {
+ detached = (buf.len == GIT_SHA1_HEXSZ && !get_oid_hex(buf.buf, oid));
+ strbuf_release(&buf);
+ if (detached)
+ return 0;
+ }
+ }
+
+ if (!len && reflog_len)
+ /* allow "@{...}" to mean the current branch reflog */
+ refs_found = dwim_ref("HEAD", 4, oid, &real_ref);
+ else if (reflog_len)
+ refs_found = dwim_log(str, len, oid, &real_ref);
+ else
+ refs_found = dwim_ref(str, len, oid, &real_ref);
+
+ if (!refs_found)
+ return -1;
+
+ if (warn_ambiguous_refs && !(flags & GET_OID_QUIETLY) &&
+ (refs_found > 1 ||
+ !get_short_oid(str, len, &tmp_oid, GET_OID_QUIETLY)))
+ warning(warn_msg, len, str);
+
+ if (reflog_len) {
+ int nth, i;
+ timestamp_t at_time;
+ timestamp_t co_time;
+ int co_tz, co_cnt;
+
+ /* Is it asking for N-th entry, or approxidate? */
+ for (i = nth = 0; 0 <= nth && i < reflog_len; i++) {
+ char ch = str[at+2+i];
+ if ('0' <= ch && ch <= '9')
+ nth = nth * 10 + ch - '0';
+ else
+ nth = -1;
+ }
+ if (100000000 <= nth) {
+ at_time = nth;
+ nth = -1;
+ } else if (0 <= nth)
+ at_time = 0;
+ else {
+ int errors = 0;
+ char *tmp = xstrndup(str + at + 2, reflog_len);
+ at_time = approxidate_careful(tmp, &errors);
+ free(tmp);
+ if (errors) {
+ free(real_ref);
+ return -1;
+ }
+ }
+ if (read_ref_at(real_ref, flags, at_time, nth, oid, NULL,
+ &co_time, &co_tz, &co_cnt)) {
+ if (!len) {
+ if (starts_with(real_ref, "refs/heads/")) {
+ str = real_ref + 11;
+ len = strlen(real_ref + 11);
+ } else {
+ /* detached HEAD */
+ str = "HEAD";
+ len = 4;
+ }
+ }
+ if (at_time) {
+ if (!(flags & GET_OID_QUIETLY)) {
+ warning("Log for '%.*s' only goes "
+ "back to %s.", len, str,
+ show_date(co_time, co_tz, DATE_MODE(RFC2822)));
+ }
+ } else {
+ if (flags & GET_OID_QUIETLY) {
+ exit(128);
+ }
+ die("Log for '%.*s' only has %d entries.",
+ len, str, co_cnt);
+ }
+ }
+ }
+
+ free(real_ref);
+ return 0;
+}
+
+static int get_parent(const char *name, int len,
+ struct object_id *result, int idx)
+{
+ struct object_id oid;
+ int ret = get_oid_1(name, len, &oid, GET_OID_COMMITTISH);
+ struct commit *commit;
+ struct commit_list *p;
+
+ if (ret)
+ return ret;
+ commit = lookup_commit_reference(&oid);
+ if (parse_commit(commit))
+ return -1;
+ if (!idx) {
+ oidcpy(result, &commit->object.oid);
+ return 0;
+ }
+ p = commit->parents;
+ while (p) {
+ if (!--idx) {
+ oidcpy(result, &p->item->object.oid);
+ return 0;
+ }
+ p = p->next;
+ }
+ return -1;
+}
+
+static int get_nth_ancestor(const char *name, int len,
+ struct object_id *result, int generation)
+{
+ struct object_id oid;
+ struct commit *commit;
+ int ret;
+
+ ret = get_oid_1(name, len, &oid, GET_OID_COMMITTISH);
+ if (ret)
+ return ret;
+ commit = lookup_commit_reference(&oid);
+ if (!commit)
+ return -1;
+
+ while (generation--) {
+ if (parse_commit(commit) || !commit->parents)
+ return -1;
+ commit = commit->parents->item;
+ }
+ oidcpy(result, &commit->object.oid);
+ return 0;
+}
+
+struct object *peel_to_type(const char *name, int namelen,
+ struct object *o, enum object_type expected_type)
+{
+ if (name && !namelen)
+ namelen = strlen(name);
+ while (1) {
+ if (!o || (!o->parsed && !parse_object(&o->oid)))
+ return NULL;
+ if (expected_type == OBJ_ANY || o->type == expected_type)
+ return o;
+ if (o->type == OBJ_TAG)
+ o = ((struct tag*) o)->tagged;
+ else if (o->type == OBJ_COMMIT)
+ o = &(((struct commit *) o)->tree->object);
+ else {
+ if (name)
+ error("%.*s: expected %s type, but the object "
+ "dereferences to %s type",
+ namelen, name, type_name(expected_type),
+ type_name(o->type));
+ return NULL;
+ }
+ }
+}
+
+static int peel_onion(const char *name, int len, struct object_id *oid,
+ unsigned lookup_flags)
+{
+ struct object_id outer;
+ const char *sp;
+ unsigned int expected_type = 0;
+ struct object *o;
+
+ /*
+ * "ref^{type}" dereferences ref repeatedly until you cannot
+ * dereference anymore, or you get an object of given type,
+ * whichever comes first. "ref^{}" means just dereference
+ * tags until you get a non-tag. "ref^0" is a shorthand for
+ * "ref^{commit}". "commit^{tree}" could be used to find the
+ * top-level tree of the given commit.
+ */
+ if (len < 4 || name[len-1] != '}')
+ return -1;
+
+ for (sp = name + len - 1; name <= sp; sp--) {
+ int ch = *sp;
+ if (ch == '{' && name < sp && sp[-1] == '^')
+ break;
+ }
+ if (sp <= name)
+ return -1;
+
+ sp++; /* beginning of type name, or closing brace for empty */
+ if (starts_with(sp, "commit}"))
+ expected_type = OBJ_COMMIT;
+ else if (starts_with(sp, "tag}"))
+ expected_type = OBJ_TAG;
+ else if (starts_with(sp, "tree}"))
+ expected_type = OBJ_TREE;
+ else if (starts_with(sp, "blob}"))
+ expected_type = OBJ_BLOB;
+ else if (starts_with(sp, "object}"))
+ expected_type = OBJ_ANY;
+ else if (sp[0] == '}')
+ expected_type = OBJ_NONE;
+ else if (sp[0] == '/')
+ expected_type = OBJ_COMMIT;
+ else
+ return -1;
+
+ lookup_flags &= ~GET_OID_DISAMBIGUATORS;
+ if (expected_type == OBJ_COMMIT)
+ lookup_flags |= GET_OID_COMMITTISH;
+ else if (expected_type == OBJ_TREE)
+ lookup_flags |= GET_OID_TREEISH;
+
+ if (get_oid_1(name, sp - name - 2, &outer, lookup_flags))
+ return -1;
+
+ o = parse_object(&outer);
+ if (!o)
+ return -1;
+ if (!expected_type) {
+ o = deref_tag(o, name, sp - name - 2);
+ if (!o || (!o->parsed && !parse_object(&o->oid)))
+ return -1;
+ oidcpy(oid, &o->oid);
+ return 0;
+ }
+
+ /*
+ * At this point, the syntax look correct, so
+ * if we do not get the needed object, we should
+ * barf.
+ */
+ o = peel_to_type(name, len, o, expected_type);
+ if (!o)
+ return -1;
+
+ oidcpy(oid, &o->oid);
+ if (sp[0] == '/') {
+ /* "$commit^{/foo}" */
+ char *prefix;
+ int ret;
+ struct commit_list *list = NULL;
+
+ /*
+ * $commit^{/}. Some regex implementation may reject.
+ * We don't need regex anyway. '' pattern always matches.
+ */
+ if (sp[1] == '}')
+ return 0;
+
+ prefix = xstrndup(sp + 1, name + len - 1 - (sp + 1));
+ commit_list_insert((struct commit *)o, &list);
+ ret = get_oid_oneline(prefix, oid, list);
+ free(prefix);
+ return ret;
+ }
+ return 0;
+}
+
+static int get_describe_name(const char *name, int len, struct object_id *oid)
+{
+ const char *cp;
+ unsigned flags = GET_OID_QUIETLY | GET_OID_COMMIT;
+
+ for (cp = name + len - 1; name + 2 <= cp; cp--) {
+ char ch = *cp;
+ if (!isxdigit(ch)) {
+ /* We must be looking at g in "SOMETHING-g"
+ * for it to be describe output.
+ */
+ if (ch == 'g' && cp[-1] == '-') {
+ cp++;
+ len -= cp - name;
+ return get_short_oid(cp, len, oid, flags);
+ }
+ }
+ }
+ return -1;
+}
+
+static int get_oid_1(const char *name, int len, struct object_id *oid, unsigned lookup_flags)
+{
+ int ret, has_suffix;
+ const char *cp;
+
+ /*
+ * "name~3" is "name^^^", "name~" is "name~1", and "name^" is "name^1".
+ */
+ has_suffix = 0;
+ for (cp = name + len - 1; name <= cp; cp--) {
+ int ch = *cp;
+ if ('0' <= ch && ch <= '9')
+ continue;
+ if (ch == '~' || ch == '^')
+ has_suffix = ch;
+ break;
+ }
+
+ if (has_suffix) {
+ int num = 0;
+ int len1 = cp - name;
+ cp++;
+ while (cp < name + len)
+ num = num * 10 + *cp++ - '0';
+ if (!num && len1 == len - 1)
+ num = 1;
+ if (has_suffix == '^')
+ return get_parent(name, len1, oid, num);
+ /* else if (has_suffix == '~') -- goes without saying */
+ return get_nth_ancestor(name, len1, oid, num);
+ }
+
+ ret = peel_onion(name, len, oid, lookup_flags);
+ if (!ret)
+ return 0;
+
+ ret = get_oid_basic(name, len, oid, lookup_flags);
+ if (!ret)
+ return 0;
+
+ /* It could be describe output that is "SOMETHING-gXXXX" */
+ ret = get_describe_name(name, len, oid);
+ if (!ret)
+ return 0;
+
+ return get_short_oid(name, len, oid, lookup_flags);
+}
+
+/*
+ * This interprets names like ':/Initial revision of "git"' by searching
+ * through history and returning the first commit whose message starts
+ * the given regular expression.
+ *
+ * For negative-matching, prefix the pattern-part with '!-', like: ':/!-WIP'.
+ *
+ * For a literal '!' character at the beginning of a pattern, you have to repeat
+ * that, like: ':/!!foo'
+ *
+ * For future extension, all other sequences beginning with ':/!' are reserved.
+ */
+
+/* Remember to update object flag allocation in object.h */
+#define ONELINE_SEEN (1u<<20)
+
+static int handle_one_ref(const char *path, const struct object_id *oid,
+ int flag, void *cb_data)
+{
+ struct commit_list **list = cb_data;
+ struct object *object = parse_object(oid);
+ if (!object)
+ return 0;
+ if (object->type == OBJ_TAG) {
+ object = deref_tag(object, path, strlen(path));
+ if (!object)
+ return 0;
+ }
+ if (object->type != OBJ_COMMIT)
+ return 0;
+ commit_list_insert((struct commit *)object, list);
+ return 0;
+}
+
+static int get_oid_oneline(const char *prefix, struct object_id *oid,
+ struct commit_list *list)
+{
+ struct commit_list *backup = NULL, *l;
+ int found = 0;
+ int negative = 0;
+ regex_t regex;
+
+ if (prefix[0] == '!') {
+ prefix++;
+
+ if (prefix[0] == '-') {
+ prefix++;
+ negative = 1;
+ } else if (prefix[0] != '!') {
+ return -1;
+ }
+ }
+
+ if (regcomp(®ex, prefix, REG_EXTENDED))
+ return -1;
+
+ for (l = list; l; l = l->next) {
+ l->item->object.flags |= ONELINE_SEEN;
+ commit_list_insert(l->item, &backup);
+ }
+ while (list) {
+ const char *p, *buf;
+ struct commit *commit;
+ int matches;
+
+ commit = pop_most_recent_commit(&list, ONELINE_SEEN);
+ if (!parse_object(&commit->object.oid))
+ continue;
+ buf = get_commit_buffer(commit, NULL);
+ p = strstr(buf, "\n\n");
+ matches = negative ^ (p && !regexec(®ex, p + 2, 0, NULL, 0));
+ unuse_commit_buffer(commit, buf);
+
+ if (matches) {
+ oidcpy(oid, &commit->object.oid);
+ found = 1;
+ break;
+ }
+ }
+ regfree(®ex);
+ free_commit_list(list);
+ for (l = backup; l; l = l->next)
+ clear_commit_marks(l->item, ONELINE_SEEN);
+ free_commit_list(backup);
+ return found ? 0 : -1;
+}
+
+struct grab_nth_branch_switch_cbdata {
+ int remaining;
+ struct strbuf buf;
+};
+
+static int grab_nth_branch_switch(struct object_id *ooid, struct object_id *noid,
+ const char *email, timestamp_t timestamp, int tz,
+ const char *message, void *cb_data)
+{
+ struct grab_nth_branch_switch_cbdata *cb = cb_data;
+ const char *match = NULL, *target = NULL;
+ size_t len;
+
+ if (skip_prefix(message, "checkout: moving from ", &match))
+ target = strstr(match, " to ");
+
+ if (!match || !target)
+ return 0;
+ if (--(cb->remaining) == 0) {
+ len = target - match;
+ strbuf_reset(&cb->buf);
+ strbuf_add(&cb->buf, match, len);
+ return 1; /* we are done */
+ }
+ return 0;
+}
+
+/*
+ * Parse @{-N} syntax, return the number of characters parsed
+ * if successful; otherwise signal an error with negative value.
+ */
+static int interpret_nth_prior_checkout(const char *name, int namelen,
+ struct strbuf *buf)
+{
+ long nth;
+ int retval;
+ struct grab_nth_branch_switch_cbdata cb;
+ const char *brace;
+ char *num_end;
+
+ if (namelen < 4)
+ return -1;
+ if (name[0] != '@' || name[1] != '{' || name[2] != '-')
+ return -1;
+ brace = memchr(name, '}', namelen);
+ if (!brace)
+ return -1;
+ nth = strtol(name + 3, &num_end, 10);
+ if (num_end != brace)
+ return -1;
+ if (nth <= 0)
+ return -1;
+ cb.remaining = nth;
+ strbuf_init(&cb.buf, 20);
+
+ retval = 0;
+ if (0 < for_each_reflog_ent_reverse("HEAD", grab_nth_branch_switch, &cb)) {
+ strbuf_reset(buf);
+ strbuf_addbuf(buf, &cb.buf);
+ retval = brace - name + 1;
+ }
+
+ strbuf_release(&cb.buf);
+ return retval;
+}
+
+int get_oid_mb(const char *name, struct object_id *oid)
+{
+ struct commit *one, *two;
+ struct commit_list *mbs;
+ struct object_id oid_tmp;
+ const char *dots;
+ int st;
+
+ dots = strstr(name, "...");
+ if (!dots)
+ return get_oid(name, oid);
+ if (dots == name)
+ st = get_oid("HEAD", &oid_tmp);
+ else {
+ struct strbuf sb;
+ strbuf_init(&sb, dots - name);
+ strbuf_add(&sb, name, dots - name);
+ st = get_oid_committish(sb.buf, &oid_tmp);
+ strbuf_release(&sb);
+ }
+ if (st)
+ return st;
+ one = lookup_commit_reference_gently(&oid_tmp, 0);
+ if (!one)
+ return -1;
+
+ if (get_oid_committish(dots[3] ? (dots + 3) : "HEAD", &oid_tmp))
+ return -1;
+ two = lookup_commit_reference_gently(&oid_tmp, 0);
+ if (!two)
+ return -1;
+ mbs = get_merge_bases(one, two);
+ if (!mbs || mbs->next)
+ st = -1;
+ else {
+ st = 0;
+ oidcpy(oid, &mbs->item->object.oid);
+ }
+ free_commit_list(mbs);
+ return st;
+}
+
+/* parse @something syntax, when 'something' is not {.*} */
+static int interpret_empty_at(const char *name, int namelen, int len, struct strbuf *buf)
+{
+ const char *next;
+
+ if (len || name[1] == '{')
+ return -1;
+
+ /* make sure it's a single @, or @@{.*}, not @foo */
+ next = memchr(name + len + 1, '@', namelen - len - 1);
+ if (next && next[1] != '{')
+ return -1;
+ if (!next)
+ next = name + namelen;
+ if (next != name + 1)
+ return -1;
+
+ strbuf_reset(buf);
+ strbuf_add(buf, "HEAD", 4);
+ return 1;
+}
+
+static int reinterpret(const char *name, int namelen, int len,
+ struct strbuf *buf, unsigned allowed)
+{
+ /* we have extra data, which might need further processing */
+ struct strbuf tmp = STRBUF_INIT;
+ int used = buf->len;
+ int ret;
+
+ strbuf_add(buf, name + len, namelen - len);
+ ret = interpret_branch_name(buf->buf, buf->len, &tmp, allowed);
+ /* that data was not interpreted, remove our cruft */
+ if (ret < 0) {
+ strbuf_setlen(buf, used);
+ return len;
+ }
+ strbuf_reset(buf);
+ strbuf_addbuf(buf, &tmp);
+ strbuf_release(&tmp);
+ /* tweak for size of {-N} versus expanded ref name */
+ return ret - used + len;
+}
+
+static void set_shortened_ref(struct strbuf *buf, const char *ref)
+{
+ char *s = shorten_unambiguous_ref(ref, 0);
+ strbuf_reset(buf);
+ strbuf_addstr(buf, s);
+ free(s);
+}
+
+static int branch_interpret_allowed(const char *refname, unsigned allowed)
+{
+ if (!allowed)
+ return 1;
+
+ if ((allowed & INTERPRET_BRANCH_LOCAL) &&
+ starts_with(refname, "refs/heads/"))
+ return 1;
+ if ((allowed & INTERPRET_BRANCH_REMOTE) &&
+ starts_with(refname, "refs/remotes/"))
+ return 1;
+
+ return 0;
+}
+
+static int interpret_branch_mark(const char *name, int namelen,
+ int at, struct strbuf *buf,
+ int (*get_mark)(const char *, int),
+ const char *(*get_data)(struct branch *,
+ struct strbuf *),
+ unsigned allowed)
+{
+ int len;
+ struct branch *branch;
+ struct strbuf err = STRBUF_INIT;
+ const char *value;
+
+ len = get_mark(name + at, namelen - at);
+ if (!len)
+ return -1;
+
+ if (memchr(name, ':', at))
+ return -1;
+
+ if (at) {
+ char *name_str = xmemdupz(name, at);
+ branch = branch_get(name_str);
+ free(name_str);
+ } else
+ branch = branch_get(NULL);
+
+ value = get_data(branch, &err);
+ if (!value)
+ die("%s", err.buf);
+
+ if (!branch_interpret_allowed(value, allowed))
+ return -1;
+
+ set_shortened_ref(buf, value);
+ return len + at;
+}
+
+int interpret_branch_name(const char *name, int namelen, struct strbuf *buf,
+ unsigned allowed)
+{
+ char *at;
+ const char *start;
+ int len;
+
+ if (!namelen)
+ namelen = strlen(name);
+
+ if (!allowed || (allowed & INTERPRET_BRANCH_LOCAL)) {
+ len = interpret_nth_prior_checkout(name, namelen, buf);
+ if (!len) {
+ return len; /* syntax Ok, not enough switches */
+ } else if (len > 0) {
+ if (len == namelen)
+ return len; /* consumed all */
+ else
+ return reinterpret(name, namelen, len, buf, allowed);
+ }
+ }
+
+ for (start = name;
+ (at = memchr(start, '@', namelen - (start - name)));
+ start = at + 1) {
+
+ if (!allowed || (allowed & INTERPRET_BRANCH_HEAD)) {
+ len = interpret_empty_at(name, namelen, at - name, buf);
+ if (len > 0)
+ return reinterpret(name, namelen, len, buf,
+ allowed);
+ }
+
+ len = interpret_branch_mark(name, namelen, at - name, buf,
+ upstream_mark, branch_get_upstream,
+ allowed);
+ if (len > 0)
+ return len;
+
+ len = interpret_branch_mark(name, namelen, at - name, buf,
+ push_mark, branch_get_push,
+ allowed);
+ if (len > 0)
+ return len;
+ }
+
+ return -1;
+}
+
+void strbuf_branchname(struct strbuf *sb, const char *name, unsigned allowed)
+{
+ int len = strlen(name);
+ int used = interpret_branch_name(name, len, sb, allowed);
+
+ if (used < 0)
+ used = 0;
+ strbuf_add(sb, name + used, len - used);
+}
+
+int strbuf_check_branch_ref(struct strbuf *sb, const char *name)
+{
+ if (startup_info->have_repository)
+ strbuf_branchname(sb, name, INTERPRET_BRANCH_LOCAL);
+ else
+ strbuf_addstr(sb, name);
+
+ /*
+ * This splice must be done even if we end up rejecting the
+ * name; builtin/branch.c::copy_or_rename_branch() still wants
+ * to see what the name expanded to so that "branch -m" can be
+ * used as a tool to correct earlier mistakes.
+ */
+ strbuf_splice(sb, 0, 0, "refs/heads/", 11);
+
+ if (*name == '-' ||
+ !strcmp(sb->buf, "refs/heads/HEAD"))
+ return -1;
+
+ return check_refname_format(sb->buf, 0);
+}
+
+/*
+ * This is like "get_oid_basic()", except it allows "object ID expressions",
+ * notably "xyz^" for "parent of xyz"
+ */
+int get_oid(const char *name, struct object_id *oid)
+{
+ struct object_context unused;
+ return get_oid_with_context(name, 0, oid, &unused);
+}
+
+
+/*
+ * Many callers know that the user meant to name a commit-ish by
+ * syntactical positions where the object name appears. Calling this
+ * function allows the machinery to disambiguate shorter-than-unique
+ * abbreviated object names between commit-ish and others.
+ *
+ * Note that this does NOT error out when the named object is not a
+ * commit-ish. It is merely to give a hint to the disambiguation
+ * machinery.
+ */
+int get_oid_committish(const char *name, struct object_id *oid)
+{
+ struct object_context unused;
+ return get_oid_with_context(name, GET_OID_COMMITTISH,
+ oid, &unused);
+}
+
+int get_oid_treeish(const char *name, struct object_id *oid)
+{
+ struct object_context unused;
+ return get_oid_with_context(name, GET_OID_TREEISH,
+ oid, &unused);
+}
+
+int get_oid_commit(const char *name, struct object_id *oid)
+{
+ struct object_context unused;
+ return get_oid_with_context(name, GET_OID_COMMIT,
+ oid, &unused);
+}
+
+int get_oid_tree(const char *name, struct object_id *oid)
+{
+ struct object_context unused;
+ return get_oid_with_context(name, GET_OID_TREE,
+ oid, &unused);
+}
+
+int get_oid_blob(const char *name, struct object_id *oid)
+{
+ struct object_context unused;
+ return get_oid_with_context(name, GET_OID_BLOB,
+ oid, &unused);
+}
+
+/* Must be called only when object_name:filename doesn't exist. */
+static void diagnose_invalid_oid_path(const char *prefix,
+ const char *filename,
+ const struct object_id *tree_oid,
+ const char *object_name,
+ int object_name_len)
+{
+ struct object_id oid;
+ unsigned mode;
+
+ if (!prefix)
+ prefix = "";
+
+ if (file_exists(filename))
+ die("Path '%s' exists on disk, but not in '%.*s'.",
+ filename, object_name_len, object_name);
+ if (is_missing_file_error(errno)) {
+ char *fullname = xstrfmt("%s%s", prefix, filename);
+
+ if (!get_tree_entry(tree_oid, fullname, &oid, &mode)) {
+ die("Path '%s' exists, but not '%s'.\n"
+ "Did you mean '%.*s:%s' aka '%.*s:./%s'?",
+ fullname,
+ filename,
+ object_name_len, object_name,
+ fullname,
+ object_name_len, object_name,
+ filename);
+ }
+ die("Path '%s' does not exist in '%.*s'",
+ filename, object_name_len, object_name);
+ }
+}
+
+/* Must be called only when :stage:filename doesn't exist. */
+static void diagnose_invalid_index_path(int stage,
+ const char *prefix,
+ const char *filename)
+{
+ const struct cache_entry *ce;
+ int pos;
+ unsigned namelen = strlen(filename);
+ struct strbuf fullname = STRBUF_INIT;
+
+ if (!prefix)
+ prefix = "";
+
+ /* Wrong stage number? */
+ pos = cache_name_pos(filename, namelen);
+ if (pos < 0)
+ pos = -pos - 1;
+ if (pos < active_nr) {
+ ce = active_cache[pos];
+ if (ce_namelen(ce) == namelen &&
+ !memcmp(ce->name, filename, namelen))
+ die("Path '%s' is in the index, but not at stage %d.\n"
+ "Did you mean ':%d:%s'?",
+ filename, stage,
+ ce_stage(ce), filename);
+ }
+
+ /* Confusion between relative and absolute filenames? */
+ strbuf_addstr(&fullname, prefix);
+ strbuf_addstr(&fullname, filename);
+ pos = cache_name_pos(fullname.buf, fullname.len);
+ if (pos < 0)
+ pos = -pos - 1;
+ if (pos < active_nr) {
+ ce = active_cache[pos];
+ if (ce_namelen(ce) == fullname.len &&
+ !memcmp(ce->name, fullname.buf, fullname.len))
+ die("Path '%s' is in the index, but not '%s'.\n"
+ "Did you mean ':%d:%s' aka ':%d:./%s'?",
+ fullname.buf, filename,
+ ce_stage(ce), fullname.buf,
+ ce_stage(ce), filename);
+ }
+
+ if (file_exists(filename))
+ die("Path '%s' exists on disk, but not in the index.", filename);
+ if (is_missing_file_error(errno))
+ die("Path '%s' does not exist (neither on disk nor in the index).",
+ filename);
+
+ strbuf_release(&fullname);
+}
+
+
+static char *resolve_relative_path(const char *rel)
+{
+ if (!starts_with(rel, "./") && !starts_with(rel, "../"))
+ return NULL;
+
+ if (!is_inside_work_tree())
+ die("relative path syntax can't be used outside working tree.");
+
+ /* die() inside prefix_path() if resolved path is outside worktree */
+ return prefix_path(startup_info->prefix,
+ startup_info->prefix ? strlen(startup_info->prefix) : 0,
+ rel);
+}
+
+static int get_oid_with_context_1(const char *name,
+ unsigned flags,
+ const char *prefix,
+ struct object_id *oid,
+ struct object_context *oc)
+{
+ int ret, bracket_depth;
+ int namelen = strlen(name);
+ const char *cp;
+ int only_to_die = flags & GET_OID_ONLY_TO_DIE;
+
+ if (only_to_die)
+ flags |= GET_OID_QUIETLY;
+
+ memset(oc, 0, sizeof(*oc));
+ oc->mode = S_IFINVALID;
+ strbuf_init(&oc->symlink_path, 0);
+ ret = get_oid_1(name, namelen, oid, flags);
+ if (!ret)
+ return ret;
+ /*
+ * sha1:path --> object name of path in ent sha1
+ * :path -> object name of absolute path in index
+ * :./path -> object name of path relative to cwd in index
+ * :[0-3]:path -> object name of path in index at stage
+ * :/foo -> recent commit matching foo
+ */
+ if (name[0] == ':') {
+ int stage = 0;
+ const struct cache_entry *ce;
+ char *new_path = NULL;
+ int pos;
+ if (!only_to_die && namelen > 2 && name[1] == '/') {
+ struct commit_list *list = NULL;
+
+ for_each_ref(handle_one_ref, &list);
+ commit_list_sort_by_date(&list);
+ return get_oid_oneline(name + 2, oid, list);
+ }
+ if (namelen < 3 ||
+ name[2] != ':' ||
+ name[1] < '0' || '3' < name[1])
+ cp = name + 1;
+ else {
+ stage = name[1] - '0';
+ cp = name + 3;
+ }
+ new_path = resolve_relative_path(cp);
+ if (!new_path) {
+ namelen = namelen - (cp - name);
+ } else {
+ cp = new_path;
+ namelen = strlen(cp);
+ }
+
+ if (flags & GET_OID_RECORD_PATH)
+ oc->path = xstrdup(cp);
+
+ if (!active_cache)
+ read_cache();
+ pos = cache_name_pos(cp, namelen);
+ if (pos < 0)
+ pos = -pos - 1;
+ while (pos < active_nr) {
+ ce = active_cache[pos];
+ if (ce_namelen(ce) != namelen ||
+ memcmp(ce->name, cp, namelen))
+ break;
+ if (ce_stage(ce) == stage) {
+ oidcpy(oid, &ce->oid);
+ oc->mode = ce->ce_mode;
+ free(new_path);
+ return 0;
+ }
+ pos++;
+ }
+ if (only_to_die && name[1] && name[1] != '/')
+ diagnose_invalid_index_path(stage, prefix, cp);
+ free(new_path);
+ return -1;
+ }
+ for (cp = name, bracket_depth = 0; *cp; cp++) {
+ if (*cp == '{')
+ bracket_depth++;
+ else if (bracket_depth && *cp == '}')
+ bracket_depth--;
+ else if (!bracket_depth && *cp == ':')
+ break;
+ }
+ if (*cp == ':') {
+ struct object_id tree_oid;
+ int len = cp - name;
+ unsigned sub_flags = flags;
+
+ sub_flags &= ~GET_OID_DISAMBIGUATORS;
+ sub_flags |= GET_OID_TREEISH;
+
+ if (!get_oid_1(name, len, &tree_oid, sub_flags)) {
+ const char *filename = cp+1;
+ char *new_filename = NULL;
+
+ new_filename = resolve_relative_path(filename);
+ if (new_filename)
+ filename = new_filename;
+ if (flags & GET_OID_FOLLOW_SYMLINKS) {
+ ret = get_tree_entry_follow_symlinks(tree_oid.hash,
+ filename, oid->hash, &oc->symlink_path,
+ &oc->mode);
+ } else {
+ ret = get_tree_entry(&tree_oid, filename, oid,
+ &oc->mode);
+ if (ret && only_to_die) {
+ diagnose_invalid_oid_path(prefix,
+ filename,
+ &tree_oid,
+ name, len);
+ }
+ }
+ hashcpy(oc->tree, tree_oid.hash);
+ if (flags & GET_OID_RECORD_PATH)
+ oc->path = xstrdup(filename);
+
+ free(new_filename);
+ return ret;
+ } else {
+ if (only_to_die)
+ die("Invalid object name '%.*s'.", len, name);
+ }
+ }
+ return ret;
+}
+
+/*
+ * Call this function when you know "name" given by the end user must
+ * name an object but it doesn't; the function _may_ die with a better
+ * diagnostic message than "no such object 'name'", e.g. "Path 'doc' does not
+ * exist in 'HEAD'" when given "HEAD:doc", or it may return in which case
+ * you have a chance to diagnose the error further.
+ */
+void maybe_die_on_misspelt_object_name(const char *name, const char *prefix)
+{
+ struct object_context oc;
+ struct object_id oid;
+ get_oid_with_context_1(name, GET_OID_ONLY_TO_DIE, prefix, &oid, &oc);
+}
+
+int get_oid_with_context(const char *str, unsigned flags, struct object_id *oid, struct object_context *oc)
+{
+ if (flags & GET_OID_FOLLOW_SYMLINKS && flags & GET_OID_ONLY_TO_DIE)
+ die("BUG: incompatible flags for get_sha1_with_context");
+ return get_oid_with_context_1(str, flags, NULL, oid, oc);
+}
+++ /dev/null
-/*
- * GIT - The information manager from hell
- *
- * Copyright (C) Linus Torvalds, 2005
- *
- * This handles basic git sha1 object files - packing, unpacking,
- * creation etc.
- */
-#include "cache.h"
-#include "config.h"
-#include "string-list.h"
-#include "lockfile.h"
-#include "delta.h"
-#include "pack.h"
-#include "blob.h"
-#include "commit.h"
-#include "run-command.h"
-#include "tag.h"
-#include "tree.h"
-#include "tree-walk.h"
-#include "refs.h"
-#include "pack-revindex.h"
-#include "sha1-lookup.h"
-#include "bulk-checkin.h"
-#include "repository.h"
-#include "streaming.h"
-#include "dir.h"
-#include "list.h"
-#include "mergesort.h"
-#include "quote.h"
-#include "packfile.h"
-#include "fetch-object.h"
-#include "object-store.h"
-
-/* The maximum size for an object header. */
-#define MAX_HEADER_LEN 32
-
-const unsigned char null_sha1[GIT_MAX_RAWSZ];
-const struct object_id null_oid;
-const struct object_id empty_tree_oid = {
- EMPTY_TREE_SHA1_BIN_LITERAL
-};
-const struct object_id empty_blob_oid = {
- EMPTY_BLOB_SHA1_BIN_LITERAL
-};
-
-static void git_hash_sha1_init(git_hash_ctx *ctx)
-{
- git_SHA1_Init(&ctx->sha1);
-}
-
-static void git_hash_sha1_update(git_hash_ctx *ctx, const void *data, size_t len)
-{
- git_SHA1_Update(&ctx->sha1, data, len);
-}
-
-static void git_hash_sha1_final(unsigned char *hash, git_hash_ctx *ctx)
-{
- git_SHA1_Final(hash, &ctx->sha1);
-}
-
-static void git_hash_unknown_init(git_hash_ctx *ctx)
-{
- die("trying to init unknown hash");
-}
-
-static void git_hash_unknown_update(git_hash_ctx *ctx, const void *data, size_t len)
-{
- die("trying to update unknown hash");
-}
-
-static void git_hash_unknown_final(unsigned char *hash, git_hash_ctx *ctx)
-{
- die("trying to finalize unknown hash");
-}
-
-const struct git_hash_algo hash_algos[GIT_HASH_NALGOS] = {
- {
- NULL,
- 0x00000000,
- 0,
- 0,
- git_hash_unknown_init,
- git_hash_unknown_update,
- git_hash_unknown_final,
- NULL,
- NULL,
- },
- {
- "sha-1",
- /* "sha1", big-endian */
- 0x73686131,
- GIT_SHA1_RAWSZ,
- GIT_SHA1_HEXSZ,
- git_hash_sha1_init,
- git_hash_sha1_update,
- git_hash_sha1_final,
- &empty_tree_oid,
- &empty_blob_oid,
- },
-};
-
-/*
- * This is meant to hold a *small* number of objects that you would
- * want read_sha1_file() to be able to return, but yet you do not want
- * to write them into the object store (e.g. a browse-only
- * application).
- */
-static struct cached_object {
- unsigned char sha1[20];
- enum object_type type;
- void *buf;
- unsigned long size;
-} *cached_objects;
-static int cached_object_nr, cached_object_alloc;
-
-static struct cached_object empty_tree = {
- EMPTY_TREE_SHA1_BIN_LITERAL,
- OBJ_TREE,
- "",
- 0
-};
-
-static struct cached_object *find_cached_object(const unsigned char *sha1)
-{
- int i;
- struct cached_object *co = cached_objects;
-
- for (i = 0; i < cached_object_nr; i++, co++) {
- if (!hashcmp(co->sha1, sha1))
- return co;
- }
- if (!hashcmp(sha1, empty_tree.sha1))
- return &empty_tree;
- return NULL;
-}
-
-
-static int get_conv_flags(unsigned flags)
-{
- if (flags & HASH_RENORMALIZE)
- return CONV_EOL_RENORMALIZE;
- else if (flags & HASH_WRITE_OBJECT)
- return global_conv_flags_eol;
- else
- return 0;
-}
-
-
-int mkdir_in_gitdir(const char *path)
-{
- if (mkdir(path, 0777)) {
- int saved_errno = errno;
- struct stat st;
- struct strbuf sb = STRBUF_INIT;
-
- if (errno != EEXIST)
- return -1;
- /*
- * Are we looking at a path in a symlinked worktree
- * whose original repository does not yet have it?
- * e.g. .git/rr-cache pointing at its original
- * repository in which the user hasn't performed any
- * conflict resolution yet?
- */
- if (lstat(path, &st) || !S_ISLNK(st.st_mode) ||
- strbuf_readlink(&sb, path, st.st_size) ||
- !is_absolute_path(sb.buf) ||
- mkdir(sb.buf, 0777)) {
- strbuf_release(&sb);
- errno = saved_errno;
- return -1;
- }
- strbuf_release(&sb);
- }
- return adjust_shared_perm(path);
-}
-
-enum scld_error safe_create_leading_directories(char *path)
-{
- char *next_component = path + offset_1st_component(path);
- enum scld_error ret = SCLD_OK;
-
- while (ret == SCLD_OK && next_component) {
- struct stat st;
- char *slash = next_component, slash_character;
-
- while (*slash && !is_dir_sep(*slash))
- slash++;
-
- if (!*slash)
- break;
-
- next_component = slash + 1;
- while (is_dir_sep(*next_component))
- next_component++;
- if (!*next_component)
- break;
-
- slash_character = *slash;
- *slash = '\0';
- if (!stat(path, &st)) {
- /* path exists */
- if (!S_ISDIR(st.st_mode)) {
- errno = ENOTDIR;
- ret = SCLD_EXISTS;
- }
- } else if (mkdir(path, 0777)) {
- if (errno == EEXIST &&
- !stat(path, &st) && S_ISDIR(st.st_mode))
- ; /* somebody created it since we checked */
- else if (errno == ENOENT)
- /*
- * Either mkdir() failed because
- * somebody just pruned the containing
- * directory, or stat() failed because
- * the file that was in our way was
- * just removed. Either way, inform
- * the caller that it might be worth
- * trying again:
- */
- ret = SCLD_VANISHED;
- else
- ret = SCLD_FAILED;
- } else if (adjust_shared_perm(path)) {
- ret = SCLD_PERMS;
- }
- *slash = slash_character;
- }
- return ret;
-}
-
-enum scld_error safe_create_leading_directories_const(const char *path)
-{
- int save_errno;
- /* path points to cache entries, so xstrdup before messing with it */
- char *buf = xstrdup(path);
- enum scld_error result = safe_create_leading_directories(buf);
-
- save_errno = errno;
- free(buf);
- errno = save_errno;
- return result;
-}
-
-int raceproof_create_file(const char *path, create_file_fn fn, void *cb)
-{
- /*
- * The number of times we will try to remove empty directories
- * in the way of path. This is only 1 because if another
- * process is racily creating directories that conflict with
- * us, we don't want to fight against them.
- */
- int remove_directories_remaining = 1;
-
- /*
- * The number of times that we will try to create the
- * directories containing path. We are willing to attempt this
- * more than once, because another process could be trying to
- * clean up empty directories at the same time as we are
- * trying to create them.
- */
- int create_directories_remaining = 3;
-
- /* A scratch copy of path, filled lazily if we need it: */
- struct strbuf path_copy = STRBUF_INIT;
-
- int ret, save_errno;
-
- /* Sanity check: */
- assert(*path);
-
-retry_fn:
- ret = fn(path, cb);
- save_errno = errno;
- if (!ret)
- goto out;
-
- if (errno == EISDIR && remove_directories_remaining-- > 0) {
- /*
- * A directory is in the way. Maybe it is empty; try
- * to remove it:
- */
- if (!path_copy.len)
- strbuf_addstr(&path_copy, path);
-
- if (!remove_dir_recursively(&path_copy, REMOVE_DIR_EMPTY_ONLY))
- goto retry_fn;
- } else if (errno == ENOENT && create_directories_remaining-- > 0) {
- /*
- * Maybe the containing directory didn't exist, or
- * maybe it was just deleted by a process that is
- * racing with us to clean up empty directories. Try
- * to create it:
- */
- enum scld_error scld_result;
-
- if (!path_copy.len)
- strbuf_addstr(&path_copy, path);
-
- do {
- scld_result = safe_create_leading_directories(path_copy.buf);
- if (scld_result == SCLD_OK)
- goto retry_fn;
- } while (scld_result == SCLD_VANISHED && create_directories_remaining-- > 0);
- }
-
-out:
- strbuf_release(&path_copy);
- errno = save_errno;
- return ret;
-}
-
-static void fill_sha1_path(struct strbuf *buf, const unsigned char *sha1)
-{
- int i;
- for (i = 0; i < 20; i++) {
- static char hex[] = "0123456789abcdef";
- unsigned int val = sha1[i];
- strbuf_addch(buf, hex[val >> 4]);
- strbuf_addch(buf, hex[val & 0xf]);
- if (!i)
- strbuf_addch(buf, '/');
- }
-}
-
-void sha1_file_name(struct repository *r, struct strbuf *buf, const unsigned char *sha1)
-{
- strbuf_addstr(buf, r->objects->objectdir);
- strbuf_addch(buf, '/');
- fill_sha1_path(buf, sha1);
-}
-
-struct strbuf *alt_scratch_buf(struct alternate_object_database *alt)
-{
- strbuf_setlen(&alt->scratch, alt->base_len);
- return &alt->scratch;
-}
-
-static const char *alt_sha1_path(struct alternate_object_database *alt,
- const unsigned char *sha1)
-{
- struct strbuf *buf = alt_scratch_buf(alt);
- fill_sha1_path(buf, sha1);
- return buf->buf;
-}
-
-/*
- * Return non-zero iff the path is usable as an alternate object database.
- */
-static int alt_odb_usable(struct raw_object_store *o,
- struct strbuf *path,
- const char *normalized_objdir)
-{
- struct alternate_object_database *alt;
-
- /* Detect cases where alternate disappeared */
- if (!is_directory(path->buf)) {
- error("object directory %s does not exist; "
- "check .git/objects/info/alternates.",
- path->buf);
- return 0;
- }
-
- /*
- * Prevent the common mistake of listing the same
- * thing twice, or object directory itself.
- */
- for (alt = o->alt_odb_list; alt; alt = alt->next) {
- if (!fspathcmp(path->buf, alt->path))
- return 0;
- }
- if (!fspathcmp(path->buf, normalized_objdir))
- return 0;
-
- return 1;
-}
-
-/*
- * Prepare alternate object database registry.
- *
- * The variable alt_odb_list points at the list of struct
- * alternate_object_database. The elements on this list come from
- * non-empty elements from colon separated ALTERNATE_DB_ENVIRONMENT
- * environment variable, and $GIT_OBJECT_DIRECTORY/info/alternates,
- * whose contents is similar to that environment variable but can be
- * LF separated. Its base points at a statically allocated buffer that
- * contains "/the/directory/corresponding/to/.git/objects/...", while
- * its name points just after the slash at the end of ".git/objects/"
- * in the example above, and has enough space to hold 40-byte hex
- * SHA1, an extra slash for the first level indirection, and the
- * terminating NUL.
- */
-static void read_info_alternates(struct repository *r,
- const char *relative_base,
- int depth);
-static int link_alt_odb_entry(struct repository *r, const char *entry,
- const char *relative_base, int depth, const char *normalized_objdir)
-{
- struct alternate_object_database *ent;
- struct strbuf pathbuf = STRBUF_INIT;
-
- if (!is_absolute_path(entry) && relative_base) {
- strbuf_realpath(&pathbuf, relative_base, 1);
- strbuf_addch(&pathbuf, '/');
- }
- strbuf_addstr(&pathbuf, entry);
-
- if (strbuf_normalize_path(&pathbuf) < 0 && relative_base) {
- error("unable to normalize alternate object path: %s",
- pathbuf.buf);
- strbuf_release(&pathbuf);
- return -1;
- }
-
- /*
- * The trailing slash after the directory name is given by
- * this function at the end. Remove duplicates.
- */
- while (pathbuf.len && pathbuf.buf[pathbuf.len - 1] == '/')
- strbuf_setlen(&pathbuf, pathbuf.len - 1);
-
- if (!alt_odb_usable(r->objects, &pathbuf, normalized_objdir)) {
- strbuf_release(&pathbuf);
- return -1;
- }
-
- ent = alloc_alt_odb(pathbuf.buf);
-
- /* add the alternate entry */
- *r->objects->alt_odb_tail = ent;
- r->objects->alt_odb_tail = &(ent->next);
- ent->next = NULL;
-
- /* recursively add alternates */
- read_info_alternates(r, pathbuf.buf, depth + 1);
-
- strbuf_release(&pathbuf);
- return 0;
-}
-
-static const char *parse_alt_odb_entry(const char *string,
- int sep,
- struct strbuf *out)
-{
- const char *end;
-
- strbuf_reset(out);
-
- if (*string == '#') {
- /* comment; consume up to next separator */
- end = strchrnul(string, sep);
- } else if (*string == '"' && !unquote_c_style(out, string, &end)) {
- /*
- * quoted path; unquote_c_style has copied the
- * data for us and set "end". Broken quoting (e.g.,
- * an entry that doesn't end with a quote) falls
- * back to the unquoted case below.
- */
- } else {
- /* normal, unquoted path */
- end = strchrnul(string, sep);
- strbuf_add(out, string, end - string);
- }
-
- if (*end)
- end++;
- return end;
-}
-
-static void link_alt_odb_entries(struct repository *r, const char *alt,
- int sep, const char *relative_base, int depth)
-{
- struct strbuf objdirbuf = STRBUF_INIT;
- struct strbuf entry = STRBUF_INIT;
-
- if (!alt || !*alt)
- return;
-
- if (depth > 5) {
- error("%s: ignoring alternate object stores, nesting too deep.",
- relative_base);
- return;
- }
-
- strbuf_add_absolute_path(&objdirbuf, r->objects->objectdir);
- if (strbuf_normalize_path(&objdirbuf) < 0)
- die("unable to normalize object directory: %s",
- objdirbuf.buf);
-
- while (*alt) {
- alt = parse_alt_odb_entry(alt, sep, &entry);
- if (!entry.len)
- continue;
- link_alt_odb_entry(r, entry.buf,
- relative_base, depth, objdirbuf.buf);
- }
- strbuf_release(&entry);
- strbuf_release(&objdirbuf);
-}
-
-static void read_info_alternates(struct repository *r,
- const char *relative_base,
- int depth)
-{
- char *path;
- struct strbuf buf = STRBUF_INIT;
-
- path = xstrfmt("%s/info/alternates", relative_base);
- if (strbuf_read_file(&buf, path, 1024) < 0) {
- warn_on_fopen_errors(path);
- free(path);
- return;
- }
-
- link_alt_odb_entries(r, buf.buf, '\n', relative_base, depth);
- strbuf_release(&buf);
- free(path);
-}
-
-struct alternate_object_database *alloc_alt_odb(const char *dir)
-{
- struct alternate_object_database *ent;
-
- FLEX_ALLOC_STR(ent, path, dir);
- strbuf_init(&ent->scratch, 0);
- strbuf_addf(&ent->scratch, "%s/", dir);
- ent->base_len = ent->scratch.len;
-
- return ent;
-}
-
-void add_to_alternates_file(const char *reference)
-{
- struct lock_file lock = LOCK_INIT;
- char *alts = git_pathdup("objects/info/alternates");
- FILE *in, *out;
- int found = 0;
-
- hold_lock_file_for_update(&lock, alts, LOCK_DIE_ON_ERROR);
- out = fdopen_lock_file(&lock, "w");
- if (!out)
- die_errno("unable to fdopen alternates lockfile");
-
- in = fopen(alts, "r");
- if (in) {
- struct strbuf line = STRBUF_INIT;
-
- while (strbuf_getline(&line, in) != EOF) {
- if (!strcmp(reference, line.buf)) {
- found = 1;
- break;
- }
- fprintf_or_die(out, "%s\n", line.buf);
- }
-
- strbuf_release(&line);
- fclose(in);
- }
- else if (errno != ENOENT)
- die_errno("unable to read alternates file");
-
- if (found) {
- rollback_lock_file(&lock);
- } else {
- fprintf_or_die(out, "%s\n", reference);
- if (commit_lock_file(&lock))
- die_errno("unable to move new alternates file into place");
- if (the_repository->objects->alt_odb_tail)
- link_alt_odb_entries(the_repository, reference,
- '\n', NULL, 0);
- }
- free(alts);
-}
-
-void add_to_alternates_memory(const char *reference)
-{
- /*
- * Make sure alternates are initialized, or else our entry may be
- * overwritten when they are.
- */
- prepare_alt_odb(the_repository);
-
- link_alt_odb_entries(the_repository, reference,
- '\n', NULL, 0);
-}
-
-/*
- * Compute the exact path an alternate is at and returns it. In case of
- * error NULL is returned and the human readable error is added to `err`
- * `path` may be relative and should point to $GITDIR.
- * `err` must not be null.
- */
-char *compute_alternate_path(const char *path, struct strbuf *err)
-{
- char *ref_git = NULL;
- const char *repo, *ref_git_s;
- int seen_error = 0;
-
- ref_git_s = real_path_if_valid(path);
- if (!ref_git_s) {
- seen_error = 1;
- strbuf_addf(err, _("path '%s' does not exist"), path);
- goto out;
- } else
- /*
- * Beware: read_gitfile(), real_path() and mkpath()
- * return static buffer
- */
- ref_git = xstrdup(ref_git_s);
-
- repo = read_gitfile(ref_git);
- if (!repo)
- repo = read_gitfile(mkpath("%s/.git", ref_git));
- if (repo) {
- free(ref_git);
- ref_git = xstrdup(repo);
- }
-
- if (!repo && is_directory(mkpath("%s/.git/objects", ref_git))) {
- char *ref_git_git = mkpathdup("%s/.git", ref_git);
- free(ref_git);
- ref_git = ref_git_git;
- } else if (!is_directory(mkpath("%s/objects", ref_git))) {
- struct strbuf sb = STRBUF_INIT;
- seen_error = 1;
- if (get_common_dir(&sb, ref_git)) {
- strbuf_addf(err,
- _("reference repository '%s' as a linked "
- "checkout is not supported yet."),
- path);
- goto out;
- }
-
- strbuf_addf(err, _("reference repository '%s' is not a "
- "local repository."), path);
- goto out;
- }
-
- if (!access(mkpath("%s/shallow", ref_git), F_OK)) {
- strbuf_addf(err, _("reference repository '%s' is shallow"),
- path);
- seen_error = 1;
- goto out;
- }
-
- if (!access(mkpath("%s/info/grafts", ref_git), F_OK)) {
- strbuf_addf(err,
- _("reference repository '%s' is grafted"),
- path);
- seen_error = 1;
- goto out;
- }
-
-out:
- if (seen_error) {
- FREE_AND_NULL(ref_git);
- }
-
- return ref_git;
-}
-
-int foreach_alt_odb(alt_odb_fn fn, void *cb)
-{
- struct alternate_object_database *ent;
- int r = 0;
-
- prepare_alt_odb(the_repository);
- for (ent = the_repository->objects->alt_odb_list; ent; ent = ent->next) {
- r = fn(ent, cb);
- if (r)
- break;
- }
- return r;
-}
-
-void prepare_alt_odb(struct repository *r)
-{
- if (r->objects->alt_odb_tail)
- return;
-
- r->objects->alt_odb_tail = &r->objects->alt_odb_list;
- link_alt_odb_entries(r, r->objects->alternate_db, PATH_SEP, NULL, 0);
-
- read_info_alternates(r, r->objects->objectdir, 0);
-}
-
-/* Returns 1 if we have successfully freshened the file, 0 otherwise. */
-static int freshen_file(const char *fn)
-{
- struct utimbuf t;
- t.actime = t.modtime = time(NULL);
- return !utime(fn, &t);
-}
-
-/*
- * All of the check_and_freshen functions return 1 if the file exists and was
- * freshened (if freshening was requested), 0 otherwise. If they return
- * 0, you should not assume that it is safe to skip a write of the object (it
- * either does not exist on disk, or has a stale mtime and may be subject to
- * pruning).
- */
-int check_and_freshen_file(const char *fn, int freshen)
-{
- if (access(fn, F_OK))
- return 0;
- if (freshen && !freshen_file(fn))
- return 0;
- return 1;
-}
-
-static int check_and_freshen_local(const unsigned char *sha1, int freshen)
-{
- static struct strbuf buf = STRBUF_INIT;
-
- strbuf_reset(&buf);
- sha1_file_name(the_repository, &buf, sha1);
-
- return check_and_freshen_file(buf.buf, freshen);
-}
-
-static int check_and_freshen_nonlocal(const unsigned char *sha1, int freshen)
-{
- struct alternate_object_database *alt;
- prepare_alt_odb(the_repository);
- for (alt = the_repository->objects->alt_odb_list; alt; alt = alt->next) {
- const char *path = alt_sha1_path(alt, sha1);
- if (check_and_freshen_file(path, freshen))
- return 1;
- }
- return 0;
-}
-
-static int check_and_freshen(const unsigned char *sha1, int freshen)
-{
- return check_and_freshen_local(sha1, freshen) ||
- check_and_freshen_nonlocal(sha1, freshen);
-}
-
-int has_loose_object_nonlocal(const unsigned char *sha1)
-{
- return check_and_freshen_nonlocal(sha1, 0);
-}
-
-static int has_loose_object(const unsigned char *sha1)
-{
- return check_and_freshen(sha1, 0);
-}
-
-static void mmap_limit_check(size_t length)
-{
- static size_t limit = 0;
- if (!limit) {
- limit = git_env_ulong("GIT_MMAP_LIMIT", 0);
- if (!limit)
- limit = SIZE_MAX;
- }
- if (length > limit)
- die("attempting to mmap %"PRIuMAX" over limit %"PRIuMAX,
- (uintmax_t)length, (uintmax_t)limit);
-}
-
-void *xmmap_gently(void *start, size_t length,
- int prot, int flags, int fd, off_t offset)
-{
- void *ret;
-
- mmap_limit_check(length);
- ret = mmap(start, length, prot, flags, fd, offset);
- if (ret == MAP_FAILED) {
- if (!length)
- return NULL;
- release_pack_memory(length);
- ret = mmap(start, length, prot, flags, fd, offset);
- }
- return ret;
-}
-
-void *xmmap(void *start, size_t length,
- int prot, int flags, int fd, off_t offset)
-{
- void *ret = xmmap_gently(start, length, prot, flags, fd, offset);
- if (ret == MAP_FAILED)
- die_errno("mmap failed");
- return ret;
-}
-
-/*
- * With an in-core object data in "map", rehash it to make sure the
- * object name actually matches "sha1" to detect object corruption.
- * With "map" == NULL, try reading the object named with "sha1" using
- * the streaming interface and rehash it to do the same.
- */
-int check_object_signature(const struct object_id *oid, void *map,
- unsigned long size, const char *type)
-{
- struct object_id real_oid;
- enum object_type obj_type;
- struct git_istream *st;
- git_hash_ctx c;
- char hdr[MAX_HEADER_LEN];
- int hdrlen;
-
- if (map) {
- hash_object_file(map, size, type, &real_oid);
- return oidcmp(oid, &real_oid) ? -1 : 0;
- }
-
- st = open_istream(oid, &obj_type, &size, NULL);
- if (!st)
- return -1;
-
- /* Generate the header */
- hdrlen = xsnprintf(hdr, sizeof(hdr), "%s %lu", type_name(obj_type), size) + 1;
-
- /* Sha1.. */
- the_hash_algo->init_fn(&c);
- the_hash_algo->update_fn(&c, hdr, hdrlen);
- for (;;) {
- char buf[1024 * 16];
- ssize_t readlen = read_istream(st, buf, sizeof(buf));
-
- if (readlen < 0) {
- close_istream(st);
- return -1;
- }
- if (!readlen)
- break;
- the_hash_algo->update_fn(&c, buf, readlen);
- }
- the_hash_algo->final_fn(real_oid.hash, &c);
- close_istream(st);
- return oidcmp(oid, &real_oid) ? -1 : 0;
-}
-
-int git_open_cloexec(const char *name, int flags)
-{
- int fd;
- static int o_cloexec = O_CLOEXEC;
-
- fd = open(name, flags | o_cloexec);
- if ((o_cloexec & O_CLOEXEC) && fd < 0 && errno == EINVAL) {
- /* Try again w/o O_CLOEXEC: the kernel might not support it */
- o_cloexec &= ~O_CLOEXEC;
- fd = open(name, flags | o_cloexec);
- }
-
-#if defined(F_GETFD) && defined(F_SETFD) && defined(FD_CLOEXEC)
- {
- static int fd_cloexec = FD_CLOEXEC;
-
- if (!o_cloexec && 0 <= fd && fd_cloexec) {
- /* Opened w/o O_CLOEXEC? try with fcntl(2) to add it */
- int flags = fcntl(fd, F_GETFD);
- if (fcntl(fd, F_SETFD, flags | fd_cloexec))
- fd_cloexec = 0;
- }
- }
-#endif
- return fd;
-}
-
-/*
- * Find "sha1" as a loose object in the local repository or in an alternate.
- * Returns 0 on success, negative on failure.
- *
- * The "path" out-parameter will give the path of the object we found (if any).
- * Note that it may point to static storage and is only valid until another
- * call to sha1_file_name(), etc.
- */
-static int stat_sha1_file(struct repository *r, const unsigned char *sha1,
- struct stat *st, const char **path)
-{
- struct alternate_object_database *alt;
- static struct strbuf buf = STRBUF_INIT;
-
- strbuf_reset(&buf);
- sha1_file_name(r, &buf, sha1);
- *path = buf.buf;
-
- if (!lstat(*path, st))
- return 0;
-
- prepare_alt_odb(r);
- errno = ENOENT;
- for (alt = r->objects->alt_odb_list; alt; alt = alt->next) {
- *path = alt_sha1_path(alt, sha1);
- if (!lstat(*path, st))
- return 0;
- }
-
- return -1;
-}
-
-/*
- * Like stat_sha1_file(), but actually open the object and return the
- * descriptor. See the caveats on the "path" parameter above.
- */
-static int open_sha1_file(struct repository *r,
- const unsigned char *sha1, const char **path)
-{
- int fd;
- struct alternate_object_database *alt;
- int most_interesting_errno;
- static struct strbuf buf = STRBUF_INIT;
-
- strbuf_reset(&buf);
- sha1_file_name(r, &buf, sha1);
- *path = buf.buf;
-
- fd = git_open(*path);
- if (fd >= 0)
- return fd;
- most_interesting_errno = errno;
-
- prepare_alt_odb(r);
- for (alt = r->objects->alt_odb_list; alt; alt = alt->next) {
- *path = alt_sha1_path(alt, sha1);
- fd = git_open(*path);
- if (fd >= 0)
- return fd;
- if (most_interesting_errno == ENOENT)
- most_interesting_errno = errno;
- }
- errno = most_interesting_errno;
- return -1;
-}
-
-/*
- * Map the loose object at "path" if it is not NULL, or the path found by
- * searching for a loose object named "sha1".
- */
-static void *map_sha1_file_1(struct repository *r, const char *path,
- const unsigned char *sha1, unsigned long *size)
-{
- void *map;
- int fd;
-
- if (path)
- fd = git_open(path);
- else
- fd = open_sha1_file(r, sha1, &path);
- map = NULL;
- if (fd >= 0) {
- struct stat st;
-
- if (!fstat(fd, &st)) {
- *size = xsize_t(st.st_size);
- if (!*size) {
- /* mmap() is forbidden on empty files */
- error("object file %s is empty", path);
- return NULL;
- }
- map = xmmap(NULL, *size, PROT_READ, MAP_PRIVATE, fd, 0);
- }
- close(fd);
- }
- return map;
-}
-
-void *map_sha1_file(struct repository *r,
- const unsigned char *sha1, unsigned long *size)
-{
- return map_sha1_file_1(r, NULL, sha1, size);
-}
-
-static int unpack_sha1_short_header(git_zstream *stream,
- unsigned char *map, unsigned long mapsize,
- void *buffer, unsigned long bufsiz)
-{
- /* Get the data stream */
- memset(stream, 0, sizeof(*stream));
- stream->next_in = map;
- stream->avail_in = mapsize;
- stream->next_out = buffer;
- stream->avail_out = bufsiz;
-
- git_inflate_init(stream);
- return git_inflate(stream, 0);
-}
-
-int unpack_sha1_header(git_zstream *stream,
- unsigned char *map, unsigned long mapsize,
- void *buffer, unsigned long bufsiz)
-{
- int status = unpack_sha1_short_header(stream, map, mapsize,
- buffer, bufsiz);
-
- if (status < Z_OK)
- return status;
-
- /* Make sure we have the terminating NUL */
- if (!memchr(buffer, '\0', stream->next_out - (unsigned char *)buffer))
- return -1;
- return 0;
-}
-
-static int unpack_sha1_header_to_strbuf(git_zstream *stream, unsigned char *map,
- unsigned long mapsize, void *buffer,
- unsigned long bufsiz, struct strbuf *header)
-{
- int status;
-
- status = unpack_sha1_short_header(stream, map, mapsize, buffer, bufsiz);
- if (status < Z_OK)
- return -1;
-
- /*
- * Check if entire header is unpacked in the first iteration.
- */
- if (memchr(buffer, '\0', stream->next_out - (unsigned char *)buffer))
- return 0;
-
- /*
- * buffer[0..bufsiz] was not large enough. Copy the partial
- * result out to header, and then append the result of further
- * reading the stream.
- */
- strbuf_add(header, buffer, stream->next_out - (unsigned char *)buffer);
- stream->next_out = buffer;
- stream->avail_out = bufsiz;
-
- do {
- status = git_inflate(stream, 0);
- strbuf_add(header, buffer, stream->next_out - (unsigned char *)buffer);
- if (memchr(buffer, '\0', stream->next_out - (unsigned char *)buffer))
- return 0;
- stream->next_out = buffer;
- stream->avail_out = bufsiz;
- } while (status != Z_STREAM_END);
- return -1;
-}
-
-static void *unpack_sha1_rest(git_zstream *stream, void *buffer, unsigned long size, const unsigned char *sha1)
-{
- int bytes = strlen(buffer) + 1;
- unsigned char *buf = xmallocz(size);
- unsigned long n;
- int status = Z_OK;
-
- n = stream->total_out - bytes;
- if (n > size)
- n = size;
- memcpy(buf, (char *) buffer + bytes, n);
- bytes = n;
- if (bytes <= size) {
- /*
- * The above condition must be (bytes <= size), not
- * (bytes < size). In other words, even though we
- * expect no more output and set avail_out to zero,
- * the input zlib stream may have bytes that express
- * "this concludes the stream", and we *do* want to
- * eat that input.
- *
- * Otherwise we would not be able to test that we
- * consumed all the input to reach the expected size;
- * we also want to check that zlib tells us that all
- * went well with status == Z_STREAM_END at the end.
- */
- stream->next_out = buf + bytes;
- stream->avail_out = size - bytes;
- while (status == Z_OK)
- status = git_inflate(stream, Z_FINISH);
- }
- if (status == Z_STREAM_END && !stream->avail_in) {
- git_inflate_end(stream);
- return buf;
- }
-
- if (status < 0)
- error("corrupt loose object '%s'", sha1_to_hex(sha1));
- else if (stream->avail_in)
- error("garbage at end of loose object '%s'",
- sha1_to_hex(sha1));
- free(buf);
- return NULL;
-}
-
-/*
- * We used to just use "sscanf()", but that's actually way
- * too permissive for what we want to check. So do an anal
- * object header parse by hand.
- */
-static int parse_sha1_header_extended(const char *hdr, struct object_info *oi,
- unsigned int flags)
-{
- const char *type_buf = hdr;
- unsigned long size;
- int type, type_len = 0;
-
- /*
- * The type can be of any size but is followed by
- * a space.
- */
- for (;;) {
- char c = *hdr++;
- if (!c)
- return -1;
- if (c == ' ')
- break;
- type_len++;
- }
-
- type = type_from_string_gently(type_buf, type_len, 1);
- if (oi->type_name)
- strbuf_add(oi->type_name, type_buf, type_len);
- /*
- * Set type to 0 if its an unknown object and
- * we're obtaining the type using '--allow-unknown-type'
- * option.
- */
- if ((flags & OBJECT_INFO_ALLOW_UNKNOWN_TYPE) && (type < 0))
- type = 0;
- else if (type < 0)
- die("invalid object type");
- if (oi->typep)
- *oi->typep = type;
-
- /*
- * The length must follow immediately, and be in canonical
- * decimal format (ie "010" is not valid).
- */
- size = *hdr++ - '0';
- if (size > 9)
- return -1;
- if (size) {
- for (;;) {
- unsigned long c = *hdr - '0';
- if (c > 9)
- break;
- hdr++;
- size = size * 10 + c;
- }
- }
-
- if (oi->sizep)
- *oi->sizep = size;
-
- /*
- * The length must be followed by a zero byte
- */
- return *hdr ? -1 : type;
-}
-
-int parse_sha1_header(const char *hdr, unsigned long *sizep)
-{
- struct object_info oi = OBJECT_INFO_INIT;
-
- oi.sizep = sizep;
- return parse_sha1_header_extended(hdr, &oi, 0);
-}
-
-static int sha1_loose_object_info(struct repository *r,
- const unsigned char *sha1,
- struct object_info *oi, int flags)
-{
- int status = 0;
- unsigned long mapsize;
- void *map;
- git_zstream stream;
- char hdr[MAX_HEADER_LEN];
- struct strbuf hdrbuf = STRBUF_INIT;
- unsigned long size_scratch;
-
- if (oi->delta_base_sha1)
- hashclr(oi->delta_base_sha1);
-
- /*
- * If we don't care about type or size, then we don't
- * need to look inside the object at all. Note that we
- * do not optimize out the stat call, even if the
- * caller doesn't care about the disk-size, since our
- * return value implicitly indicates whether the
- * object even exists.
- */
- if (!oi->typep && !oi->type_name && !oi->sizep && !oi->contentp) {
- const char *path;
- struct stat st;
- if (stat_sha1_file(r, sha1, &st, &path) < 0)
- return -1;
- if (oi->disk_sizep)
- *oi->disk_sizep = st.st_size;
- return 0;
- }
-
- map = map_sha1_file(r, sha1, &mapsize);
- if (!map)
- return -1;
-
- if (!oi->sizep)
- oi->sizep = &size_scratch;
-
- if (oi->disk_sizep)
- *oi->disk_sizep = mapsize;
- if ((flags & OBJECT_INFO_ALLOW_UNKNOWN_TYPE)) {
- if (unpack_sha1_header_to_strbuf(&stream, map, mapsize, hdr, sizeof(hdr), &hdrbuf) < 0)
- status = error("unable to unpack %s header with --allow-unknown-type",
- sha1_to_hex(sha1));
- } else if (unpack_sha1_header(&stream, map, mapsize, hdr, sizeof(hdr)) < 0)
- status = error("unable to unpack %s header",
- sha1_to_hex(sha1));
- if (status < 0)
- ; /* Do nothing */
- else if (hdrbuf.len) {
- if ((status = parse_sha1_header_extended(hdrbuf.buf, oi, flags)) < 0)
- status = error("unable to parse %s header with --allow-unknown-type",
- sha1_to_hex(sha1));
- } else if ((status = parse_sha1_header_extended(hdr, oi, flags)) < 0)
- status = error("unable to parse %s header", sha1_to_hex(sha1));
-
- if (status >= 0 && oi->contentp) {
- *oi->contentp = unpack_sha1_rest(&stream, hdr,
- *oi->sizep, sha1);
- if (!*oi->contentp) {
- git_inflate_end(&stream);
- status = -1;
- }
- } else
- git_inflate_end(&stream);
-
- munmap(map, mapsize);
- if (status && oi->typep)
- *oi->typep = status;
- if (oi->sizep == &size_scratch)
- oi->sizep = NULL;
- strbuf_release(&hdrbuf);
- oi->whence = OI_LOOSE;
- return (status < 0) ? status : 0;
-}
-
-int fetch_if_missing = 1;
-
-int oid_object_info_extended(const struct object_id *oid, struct object_info *oi, unsigned flags)
-{
- static struct object_info blank_oi = OBJECT_INFO_INIT;
- struct pack_entry e;
- int rtype;
- const struct object_id *real = oid;
- int already_retried = 0;
-
- if (flags & OBJECT_INFO_LOOKUP_REPLACE)
- real = lookup_replace_object(oid);
-
- if (is_null_oid(real))
- return -1;
-
- if (!oi)
- oi = &blank_oi;
-
- if (!(flags & OBJECT_INFO_SKIP_CACHED)) {
- struct cached_object *co = find_cached_object(real->hash);
- if (co) {
- if (oi->typep)
- *(oi->typep) = co->type;
- if (oi->sizep)
- *(oi->sizep) = co->size;
- if (oi->disk_sizep)
- *(oi->disk_sizep) = 0;
- if (oi->delta_base_sha1)
- hashclr(oi->delta_base_sha1);
- if (oi->type_name)
- strbuf_addstr(oi->type_name, type_name(co->type));
- if (oi->contentp)
- *oi->contentp = xmemdupz(co->buf, co->size);
- oi->whence = OI_CACHED;
- return 0;
- }
- }
-
- while (1) {
- if (find_pack_entry(the_repository, real->hash, &e))
- break;
-
- if (flags & OBJECT_INFO_IGNORE_LOOSE)
- return -1;
-
- /* Most likely it's a loose object. */
- if (!sha1_loose_object_info(the_repository, real->hash, oi, flags))
- return 0;
-
- /* Not a loose object; someone else may have just packed it. */
- if (!(flags & OBJECT_INFO_QUICK)) {
- reprepare_packed_git(the_repository);
- if (find_pack_entry(the_repository, real->hash, &e))
- break;
- }
-
- /* Check if it is a missing object */
- if (fetch_if_missing && repository_format_partial_clone &&
- !already_retried) {
- /*
- * TODO Investigate haveing fetch_object() return
- * TODO error/success and stopping the music here.
- */
- fetch_object(repository_format_partial_clone, real->hash);
- already_retried = 1;
- continue;
- }
-
- return -1;
- }
-
- if (oi == &blank_oi)
- /*
- * We know that the caller doesn't actually need the
- * information below, so return early.
- */
- return 0;
- rtype = packed_object_info(e.p, e.offset, oi);
- if (rtype < 0) {
- mark_bad_packed_object(e.p, real->hash);
- return oid_object_info_extended(real, oi, 0);
- } else if (oi->whence == OI_PACKED) {
- oi->u.packed.offset = e.offset;
- oi->u.packed.pack = e.p;
- oi->u.packed.is_delta = (rtype == OBJ_REF_DELTA ||
- rtype == OBJ_OFS_DELTA);
- }
-
- return 0;
-}
-
-/* returns enum object_type or negative */
-int oid_object_info(const struct object_id *oid, unsigned long *sizep)
-{
- enum object_type type;
- struct object_info oi = OBJECT_INFO_INIT;
-
- oi.typep = &type;
- oi.sizep = sizep;
- if (oid_object_info_extended(oid, &oi,
- OBJECT_INFO_LOOKUP_REPLACE) < 0)
- return -1;
- return type;
-}
-
-static void *read_object(const unsigned char *sha1, enum object_type *type,
- unsigned long *size)
-{
- struct object_id oid;
- struct object_info oi = OBJECT_INFO_INIT;
- void *content;
- oi.typep = type;
- oi.sizep = size;
- oi.contentp = &content;
-
- hashcpy(oid.hash, sha1);
-
- if (oid_object_info_extended(&oid, &oi, 0) < 0)
- return NULL;
- return content;
-}
-
-int pretend_object_file(void *buf, unsigned long len, enum object_type type,
- struct object_id *oid)
-{
- struct cached_object *co;
-
- hash_object_file(buf, len, type_name(type), oid);
- if (has_sha1_file(oid->hash) || find_cached_object(oid->hash))
- return 0;
- ALLOC_GROW(cached_objects, cached_object_nr + 1, cached_object_alloc);
- co = &cached_objects[cached_object_nr++];
- co->size = len;
- co->type = type;
- co->buf = xmalloc(len);
- memcpy(co->buf, buf, len);
- hashcpy(co->sha1, oid->hash);
- return 0;
-}
-
-/*
- * This function dies on corrupt objects; the callers who want to
- * deal with them should arrange to call read_object() and give error
- * messages themselves.
- */
-void *read_object_file_extended(const struct object_id *oid,
- enum object_type *type,
- unsigned long *size,
- int lookup_replace)
-{
- void *data;
- const struct packed_git *p;
- const char *path;
- struct stat st;
- const struct object_id *repl = lookup_replace ? lookup_replace_object(oid)
- : oid;
-
- errno = 0;
- data = read_object(repl->hash, type, size);
- if (data)
- return data;
-
- if (errno && errno != ENOENT)
- die_errno("failed to read object %s", oid_to_hex(oid));
-
- /* die if we replaced an object with one that does not exist */
- if (repl != oid)
- die("replacement %s not found for %s",
- oid_to_hex(repl), oid_to_hex(oid));
-
- if (!stat_sha1_file(the_repository, repl->hash, &st, &path))
- die("loose object %s (stored in %s) is corrupt",
- oid_to_hex(repl), path);
-
- if ((p = has_packed_and_bad(repl->hash)) != NULL)
- die("packed object %s (stored in %s) is corrupt",
- oid_to_hex(repl), p->pack_name);
-
- return NULL;
-}
-
-void *read_object_with_reference(const struct object_id *oid,
- const char *required_type_name,
- unsigned long *size,
- struct object_id *actual_oid_return)
-{
- enum object_type type, required_type;
- void *buffer;
- unsigned long isize;
- struct object_id actual_oid;
-
- required_type = type_from_string(required_type_name);
- oidcpy(&actual_oid, oid);
- while (1) {
- int ref_length = -1;
- const char *ref_type = NULL;
-
- buffer = read_object_file(&actual_oid, &type, &isize);
- if (!buffer)
- return NULL;
- if (type == required_type) {
- *size = isize;
- if (actual_oid_return)
- oidcpy(actual_oid_return, &actual_oid);
- return buffer;
- }
- /* Handle references */
- else if (type == OBJ_COMMIT)
- ref_type = "tree ";
- else if (type == OBJ_TAG)
- ref_type = "object ";
- else {
- free(buffer);
- return NULL;
- }
- ref_length = strlen(ref_type);
-
- if (ref_length + GIT_SHA1_HEXSZ > isize ||
- memcmp(buffer, ref_type, ref_length) ||
- get_oid_hex((char *) buffer + ref_length, &actual_oid)) {
- free(buffer);
- return NULL;
- }
- free(buffer);
- /* Now we have the ID of the referred-to object in
- * actual_oid. Check again. */
- }
-}
-
-static void write_object_file_prepare(const void *buf, unsigned long len,
- const char *type, struct object_id *oid,
- char *hdr, int *hdrlen)
-{
- git_hash_ctx c;
-
- /* Generate the header */
- *hdrlen = xsnprintf(hdr, *hdrlen, "%s %lu", type, len)+1;
-
- /* Sha1.. */
- the_hash_algo->init_fn(&c);
- the_hash_algo->update_fn(&c, hdr, *hdrlen);
- the_hash_algo->update_fn(&c, buf, len);
- the_hash_algo->final_fn(oid->hash, &c);
-}
-
-/*
- * Move the just written object into its final resting place.
- */
-int finalize_object_file(const char *tmpfile, const char *filename)
-{
- int ret = 0;
-
- if (object_creation_mode == OBJECT_CREATION_USES_RENAMES)
- goto try_rename;
- else if (link(tmpfile, filename))
- ret = errno;
-
- /*
- * Coda hack - coda doesn't like cross-directory links,
- * so we fall back to a rename, which will mean that it
- * won't be able to check collisions, but that's not a
- * big deal.
- *
- * The same holds for FAT formatted media.
- *
- * When this succeeds, we just return. We have nothing
- * left to unlink.
- */
- if (ret && ret != EEXIST) {
- try_rename:
- if (!rename(tmpfile, filename))
- goto out;
- ret = errno;
- }
- unlink_or_warn(tmpfile);
- if (ret) {
- if (ret != EEXIST) {
- return error_errno("unable to write sha1 filename %s", filename);
- }
- /* FIXME!!! Collision check here ? */
- }
-
-out:
- if (adjust_shared_perm(filename))
- return error("unable to set permission to '%s'", filename);
- return 0;
-}
-
-static int write_buffer(int fd, const void *buf, size_t len)
-{
- if (write_in_full(fd, buf, len) < 0)
- return error_errno("file write error");
- return 0;
-}
-
-int hash_object_file(const void *buf, unsigned long len, const char *type,
- struct object_id *oid)
-{
- char hdr[MAX_HEADER_LEN];
- int hdrlen = sizeof(hdr);
- write_object_file_prepare(buf, len, type, oid, hdr, &hdrlen);
- return 0;
-}
-
-/* Finalize a file on disk, and close it. */
-static void close_sha1_file(int fd)
-{
- if (fsync_object_files)
- fsync_or_die(fd, "sha1 file");
- if (close(fd) != 0)
- die_errno("error when closing sha1 file");
-}
-
-/* Size of directory component, including the ending '/' */
-static inline int directory_size(const char *filename)
-{
- const char *s = strrchr(filename, '/');
- if (!s)
- return 0;
- return s - filename + 1;
-}
-
-/*
- * This creates a temporary file in the same directory as the final
- * 'filename'
- *
- * We want to avoid cross-directory filename renames, because those
- * can have problems on various filesystems (FAT, NFS, Coda).
- */
-static int create_tmpfile(struct strbuf *tmp, const char *filename)
-{
- int fd, dirlen = directory_size(filename);
-
- strbuf_reset(tmp);
- strbuf_add(tmp, filename, dirlen);
- strbuf_addstr(tmp, "tmp_obj_XXXXXX");
- fd = git_mkstemp_mode(tmp->buf, 0444);
- if (fd < 0 && dirlen && errno == ENOENT) {
- /*
- * Make sure the directory exists; note that the contents
- * of the buffer are undefined after mkstemp returns an
- * error, so we have to rewrite the whole buffer from
- * scratch.
- */
- strbuf_reset(tmp);
- strbuf_add(tmp, filename, dirlen - 1);
- if (mkdir(tmp->buf, 0777) && errno != EEXIST)
- return -1;
- if (adjust_shared_perm(tmp->buf))
- return -1;
-
- /* Try again */
- strbuf_addstr(tmp, "/tmp_obj_XXXXXX");
- fd = git_mkstemp_mode(tmp->buf, 0444);
- }
- return fd;
-}
-
-static int write_loose_object(const struct object_id *oid, char *hdr,
- int hdrlen, const void *buf, unsigned long len,
- time_t mtime)
-{
- int fd, ret;
- unsigned char compressed[4096];
- git_zstream stream;
- git_hash_ctx c;
- struct object_id parano_oid;
- static struct strbuf tmp_file = STRBUF_INIT;
- static struct strbuf filename = STRBUF_INIT;
-
- strbuf_reset(&filename);
- sha1_file_name(the_repository, &filename, oid->hash);
-
- fd = create_tmpfile(&tmp_file, filename.buf);
- if (fd < 0) {
- if (errno == EACCES)
- return error("insufficient permission for adding an object to repository database %s", get_object_directory());
- else
- return error_errno("unable to create temporary file");
- }
-
- /* Set it up */
- git_deflate_init(&stream, zlib_compression_level);
- stream.next_out = compressed;
- stream.avail_out = sizeof(compressed);
- the_hash_algo->init_fn(&c);
-
- /* First header.. */
- stream.next_in = (unsigned char *)hdr;
- stream.avail_in = hdrlen;
- while (git_deflate(&stream, 0) == Z_OK)
- ; /* nothing */
- the_hash_algo->update_fn(&c, hdr, hdrlen);
-
- /* Then the data itself.. */
- stream.next_in = (void *)buf;
- stream.avail_in = len;
- do {
- unsigned char *in0 = stream.next_in;
- ret = git_deflate(&stream, Z_FINISH);
- the_hash_algo->update_fn(&c, in0, stream.next_in - in0);
- if (write_buffer(fd, compressed, stream.next_out - compressed) < 0)
- die("unable to write sha1 file");
- stream.next_out = compressed;
- stream.avail_out = sizeof(compressed);
- } while (ret == Z_OK);
-
- if (ret != Z_STREAM_END)
- die("unable to deflate new object %s (%d)", oid_to_hex(oid),
- ret);
- ret = git_deflate_end_gently(&stream);
- if (ret != Z_OK)
- die("deflateEnd on object %s failed (%d)", oid_to_hex(oid),
- ret);
- the_hash_algo->final_fn(parano_oid.hash, &c);
- if (oidcmp(oid, ¶no_oid) != 0)
- die("confused by unstable object source data for %s",
- oid_to_hex(oid));
-
- close_sha1_file(fd);
-
- if (mtime) {
- struct utimbuf utb;
- utb.actime = mtime;
- utb.modtime = mtime;
- if (utime(tmp_file.buf, &utb) < 0)
- warning_errno("failed utime() on %s", tmp_file.buf);
- }
-
- return finalize_object_file(tmp_file.buf, filename.buf);
-}
-
-static int freshen_loose_object(const unsigned char *sha1)
-{
- return check_and_freshen(sha1, 1);
-}
-
-static int freshen_packed_object(const unsigned char *sha1)
-{
- struct pack_entry e;
- if (!find_pack_entry(the_repository, sha1, &e))
- return 0;
- if (e.p->freshened)
- return 1;
- if (!freshen_file(e.p->pack_name))
- return 0;
- e.p->freshened = 1;
- return 1;
-}
-
-int write_object_file(const void *buf, unsigned long len, const char *type,
- struct object_id *oid)
-{
- char hdr[MAX_HEADER_LEN];
- int hdrlen = sizeof(hdr);
-
- /* Normally if we have it in the pack then we do not bother writing
- * it out into .git/objects/??/?{38} file.
- */
- write_object_file_prepare(buf, len, type, oid, hdr, &hdrlen);
- if (freshen_packed_object(oid->hash) || freshen_loose_object(oid->hash))
- return 0;
- return write_loose_object(oid, hdr, hdrlen, buf, len, 0);
-}
-
-int hash_object_file_literally(const void *buf, unsigned long len,
- const char *type, struct object_id *oid,
- unsigned flags)
-{
- char *header;
- int hdrlen, status = 0;
-
- /* type string, SP, %lu of the length plus NUL must fit this */
- hdrlen = strlen(type) + MAX_HEADER_LEN;
- header = xmalloc(hdrlen);
- write_object_file_prepare(buf, len, type, oid, header, &hdrlen);
-
- if (!(flags & HASH_WRITE_OBJECT))
- goto cleanup;
- if (freshen_packed_object(oid->hash) || freshen_loose_object(oid->hash))
- goto cleanup;
- status = write_loose_object(oid, header, hdrlen, buf, len, 0);
-
-cleanup:
- free(header);
- return status;
-}
-
-int force_object_loose(const struct object_id *oid, time_t mtime)
-{
- void *buf;
- unsigned long len;
- enum object_type type;
- char hdr[MAX_HEADER_LEN];
- int hdrlen;
- int ret;
-
- if (has_loose_object(oid->hash))
- return 0;
- buf = read_object(oid->hash, &type, &len);
- if (!buf)
- return error("cannot read sha1_file for %s", oid_to_hex(oid));
- hdrlen = xsnprintf(hdr, sizeof(hdr), "%s %lu", type_name(type), len) + 1;
- ret = write_loose_object(oid, hdr, hdrlen, buf, len, mtime);
- free(buf);
-
- return ret;
-}
-
-int has_sha1_file_with_flags(const unsigned char *sha1, int flags)
-{
- struct object_id oid;
- if (!startup_info->have_repository)
- return 0;
- hashcpy(oid.hash, sha1);
- return oid_object_info_extended(&oid, NULL,
- flags | OBJECT_INFO_SKIP_CACHED) >= 0;
-}
-
-int has_object_file(const struct object_id *oid)
-{
- return has_sha1_file(oid->hash);
-}
-
-int has_object_file_with_flags(const struct object_id *oid, int flags)
-{
- return has_sha1_file_with_flags(oid->hash, flags);
-}
-
-static void check_tree(const void *buf, size_t size)
-{
- struct tree_desc desc;
- struct name_entry entry;
-
- init_tree_desc(&desc, buf, size);
- while (tree_entry(&desc, &entry))
- /* do nothing
- * tree_entry() will die() on malformed entries */
- ;
-}
-
-static void check_commit(const void *buf, size_t size)
-{
- struct commit c;
- memset(&c, 0, sizeof(c));
- if (parse_commit_buffer(&c, buf, size))
- die("corrupt commit");
-}
-
-static void check_tag(const void *buf, size_t size)
-{
- struct tag t;
- memset(&t, 0, sizeof(t));
- if (parse_tag_buffer(&t, buf, size))
- die("corrupt tag");
-}
-
-static int index_mem(struct object_id *oid, void *buf, size_t size,
- enum object_type type,
- const char *path, unsigned flags)
-{
- int ret, re_allocated = 0;
- int write_object = flags & HASH_WRITE_OBJECT;
-
- if (!type)
- type = OBJ_BLOB;
-
- /*
- * Convert blobs to git internal format
- */
- if ((type == OBJ_BLOB) && path) {
- struct strbuf nbuf = STRBUF_INIT;
- if (convert_to_git(&the_index, path, buf, size, &nbuf,
- get_conv_flags(flags))) {
- buf = strbuf_detach(&nbuf, &size);
- re_allocated = 1;
- }
- }
- if (flags & HASH_FORMAT_CHECK) {
- if (type == OBJ_TREE)
- check_tree(buf, size);
- if (type == OBJ_COMMIT)
- check_commit(buf, size);
- if (type == OBJ_TAG)
- check_tag(buf, size);
- }
-
- if (write_object)
- ret = write_object_file(buf, size, type_name(type), oid);
- else
- ret = hash_object_file(buf, size, type_name(type), oid);
- if (re_allocated)
- free(buf);
- return ret;
-}
-
-static int index_stream_convert_blob(struct object_id *oid, int fd,
- const char *path, unsigned flags)
-{
- int ret;
- const int write_object = flags & HASH_WRITE_OBJECT;
- struct strbuf sbuf = STRBUF_INIT;
-
- assert(path);
- assert(would_convert_to_git_filter_fd(path));
-
- convert_to_git_filter_fd(&the_index, path, fd, &sbuf,
- get_conv_flags(flags));
-
- if (write_object)
- ret = write_object_file(sbuf.buf, sbuf.len, type_name(OBJ_BLOB),
- oid);
- else
- ret = hash_object_file(sbuf.buf, sbuf.len, type_name(OBJ_BLOB),
- oid);
- strbuf_release(&sbuf);
- return ret;
-}
-
-static int index_pipe(struct object_id *oid, int fd, enum object_type type,
- const char *path, unsigned flags)
-{
- struct strbuf sbuf = STRBUF_INIT;
- int ret;
-
- if (strbuf_read(&sbuf, fd, 4096) >= 0)
- ret = index_mem(oid, sbuf.buf, sbuf.len, type, path, flags);
- else
- ret = -1;
- strbuf_release(&sbuf);
- return ret;
-}
-
-#define SMALL_FILE_SIZE (32*1024)
-
-static int index_core(struct object_id *oid, int fd, size_t size,
- enum object_type type, const char *path,
- unsigned flags)
-{
- int ret;
-
- if (!size) {
- ret = index_mem(oid, "", size, type, path, flags);
- } else if (size <= SMALL_FILE_SIZE) {
- char *buf = xmalloc(size);
- ssize_t read_result = read_in_full(fd, buf, size);
- if (read_result < 0)
- ret = error_errno("read error while indexing %s",
- path ? path : "<unknown>");
- else if (read_result != size)
- ret = error("short read while indexing %s",
- path ? path : "<unknown>");
- else
- ret = index_mem(oid, buf, size, type, path, flags);
- free(buf);
- } else {
- void *buf = xmmap(NULL, size, PROT_READ, MAP_PRIVATE, fd, 0);
- ret = index_mem(oid, buf, size, type, path, flags);
- munmap(buf, size);
- }
- return ret;
-}
-
-/*
- * This creates one packfile per large blob unless bulk-checkin
- * machinery is "plugged".
- *
- * This also bypasses the usual "convert-to-git" dance, and that is on
- * purpose. We could write a streaming version of the converting
- * functions and insert that before feeding the data to fast-import
- * (or equivalent in-core API described above). However, that is
- * somewhat complicated, as we do not know the size of the filter
- * result, which we need to know beforehand when writing a git object.
- * Since the primary motivation for trying to stream from the working
- * tree file and to avoid mmaping it in core is to deal with large
- * binary blobs, they generally do not want to get any conversion, and
- * callers should avoid this code path when filters are requested.
- */
-static int index_stream(struct object_id *oid, int fd, size_t size,
- enum object_type type, const char *path,
- unsigned flags)
-{
- return index_bulk_checkin(oid, fd, size, type, path, flags);
-}
-
-int index_fd(struct object_id *oid, int fd, struct stat *st,
- enum object_type type, const char *path, unsigned flags)
-{
- int ret;
-
- /*
- * Call xsize_t() only when needed to avoid potentially unnecessary
- * die() for large files.
- */
- if (type == OBJ_BLOB && path && would_convert_to_git_filter_fd(path))
- ret = index_stream_convert_blob(oid, fd, path, flags);
- else if (!S_ISREG(st->st_mode))
- ret = index_pipe(oid, fd, type, path, flags);
- else if (st->st_size <= big_file_threshold || type != OBJ_BLOB ||
- (path && would_convert_to_git(&the_index, path)))
- ret = index_core(oid, fd, xsize_t(st->st_size), type, path,
- flags);
- else
- ret = index_stream(oid, fd, xsize_t(st->st_size), type, path,
- flags);
- close(fd);
- return ret;
-}
-
-int index_path(struct object_id *oid, const char *path, struct stat *st, unsigned flags)
-{
- int fd;
- struct strbuf sb = STRBUF_INIT;
- int rc = 0;
-
- switch (st->st_mode & S_IFMT) {
- case S_IFREG:
- fd = open(path, O_RDONLY);
- if (fd < 0)
- return error_errno("open(\"%s\")", path);
- if (index_fd(oid, fd, st, OBJ_BLOB, path, flags) < 0)
- return error("%s: failed to insert into database",
- path);
- break;
- case S_IFLNK:
- if (strbuf_readlink(&sb, path, st->st_size))
- return error_errno("readlink(\"%s\")", path);
- if (!(flags & HASH_WRITE_OBJECT))
- hash_object_file(sb.buf, sb.len, blob_type, oid);
- else if (write_object_file(sb.buf, sb.len, blob_type, oid))
- rc = error("%s: failed to insert into database", path);
- strbuf_release(&sb);
- break;
- case S_IFDIR:
- return resolve_gitlink_ref(path, "HEAD", oid);
- default:
- return error("%s: unsupported file type", path);
- }
- return rc;
-}
-
-int read_pack_header(int fd, struct pack_header *header)
-{
- if (read_in_full(fd, header, sizeof(*header)) != sizeof(*header))
- /* "eof before pack header was fully read" */
- return PH_ERROR_EOF;
-
- if (header->hdr_signature != htonl(PACK_SIGNATURE))
- /* "protocol error (pack signature mismatch detected)" */
- return PH_ERROR_PACK_SIGNATURE;
- if (!pack_version_ok(header->hdr_version))
- /* "protocol error (pack version unsupported)" */
- return PH_ERROR_PROTOCOL;
- return 0;
-}
-
-void assert_oid_type(const struct object_id *oid, enum object_type expect)
-{
- enum object_type type = oid_object_info(oid, NULL);
- if (type < 0)
- die("%s is not a valid object", oid_to_hex(oid));
- if (type != expect)
- die("%s is not a valid '%s' object", oid_to_hex(oid),
- type_name(expect));
-}
-
-int for_each_file_in_obj_subdir(unsigned int subdir_nr,
- struct strbuf *path,
- each_loose_object_fn obj_cb,
- each_loose_cruft_fn cruft_cb,
- each_loose_subdir_fn subdir_cb,
- void *data)
-{
- size_t origlen, baselen;
- DIR *dir;
- struct dirent *de;
- int r = 0;
- struct object_id oid;
-
- if (subdir_nr > 0xff)
- BUG("invalid loose object subdirectory: %x", subdir_nr);
-
- origlen = path->len;
- strbuf_complete(path, '/');
- strbuf_addf(path, "%02x", subdir_nr);
-
- dir = opendir(path->buf);
- if (!dir) {
- if (errno != ENOENT)
- r = error_errno("unable to open %s", path->buf);
- strbuf_setlen(path, origlen);
- return r;
- }
-
- oid.hash[0] = subdir_nr;
- strbuf_addch(path, '/');
- baselen = path->len;
-
- while ((de = readdir(dir))) {
- size_t namelen;
- if (is_dot_or_dotdot(de->d_name))
- continue;
-
- namelen = strlen(de->d_name);
- strbuf_setlen(path, baselen);
- strbuf_add(path, de->d_name, namelen);
- if (namelen == GIT_SHA1_HEXSZ - 2 &&
- !hex_to_bytes(oid.hash + 1, de->d_name,
- GIT_SHA1_RAWSZ - 1)) {
- if (obj_cb) {
- r = obj_cb(&oid, path->buf, data);
- if (r)
- break;
- }
- continue;
- }
-
- if (cruft_cb) {
- r = cruft_cb(de->d_name, path->buf, data);
- if (r)
- break;
- }
- }
- closedir(dir);
-
- strbuf_setlen(path, baselen - 1);
- if (!r && subdir_cb)
- r = subdir_cb(subdir_nr, path->buf, data);
-
- strbuf_setlen(path, origlen);
-
- return r;
-}
-
-int for_each_loose_file_in_objdir_buf(struct strbuf *path,
- each_loose_object_fn obj_cb,
- each_loose_cruft_fn cruft_cb,
- each_loose_subdir_fn subdir_cb,
- void *data)
-{
- int r = 0;
- int i;
-
- for (i = 0; i < 256; i++) {
- r = for_each_file_in_obj_subdir(i, path, obj_cb, cruft_cb,
- subdir_cb, data);
- if (r)
- break;
- }
-
- return r;
-}
-
-int for_each_loose_file_in_objdir(const char *path,
- each_loose_object_fn obj_cb,
- each_loose_cruft_fn cruft_cb,
- each_loose_subdir_fn subdir_cb,
- void *data)
-{
- struct strbuf buf = STRBUF_INIT;
- int r;
-
- strbuf_addstr(&buf, path);
- r = for_each_loose_file_in_objdir_buf(&buf, obj_cb, cruft_cb,
- subdir_cb, data);
- strbuf_release(&buf);
-
- return r;
-}
-
-struct loose_alt_odb_data {
- each_loose_object_fn *cb;
- void *data;
-};
-
-static int loose_from_alt_odb(struct alternate_object_database *alt,
- void *vdata)
-{
- struct loose_alt_odb_data *data = vdata;
- struct strbuf buf = STRBUF_INIT;
- int r;
-
- strbuf_addstr(&buf, alt->path);
- r = for_each_loose_file_in_objdir_buf(&buf,
- data->cb, NULL, NULL,
- data->data);
- strbuf_release(&buf);
- return r;
-}
-
-int for_each_loose_object(each_loose_object_fn cb, void *data, unsigned flags)
-{
- struct loose_alt_odb_data alt;
- int r;
-
- r = for_each_loose_file_in_objdir(get_object_directory(),
- cb, NULL, NULL, data);
- if (r)
- return r;
-
- if (flags & FOR_EACH_OBJECT_LOCAL_ONLY)
- return 0;
-
- alt.cb = cb;
- alt.data = data;
- return foreach_alt_odb(loose_from_alt_odb, &alt);
-}
-
-static int check_stream_sha1(git_zstream *stream,
- const char *hdr,
- unsigned long size,
- const char *path,
- const unsigned char *expected_sha1)
-{
- git_hash_ctx c;
- unsigned char real_sha1[GIT_MAX_RAWSZ];
- unsigned char buf[4096];
- unsigned long total_read;
- int status = Z_OK;
-
- the_hash_algo->init_fn(&c);
- the_hash_algo->update_fn(&c, hdr, stream->total_out);
-
- /*
- * We already read some bytes into hdr, but the ones up to the NUL
- * do not count against the object's content size.
- */
- total_read = stream->total_out - strlen(hdr) - 1;
-
- /*
- * This size comparison must be "<=" to read the final zlib packets;
- * see the comment in unpack_sha1_rest for details.
- */
- while (total_read <= size &&
- (status == Z_OK || status == Z_BUF_ERROR)) {
- stream->next_out = buf;
- stream->avail_out = sizeof(buf);
- if (size - total_read < stream->avail_out)
- stream->avail_out = size - total_read;
- status = git_inflate(stream, Z_FINISH);
- the_hash_algo->update_fn(&c, buf, stream->next_out - buf);
- total_read += stream->next_out - buf;
- }
- git_inflate_end(stream);
-
- if (status != Z_STREAM_END) {
- error("corrupt loose object '%s'", sha1_to_hex(expected_sha1));
- return -1;
- }
- if (stream->avail_in) {
- error("garbage at end of loose object '%s'",
- sha1_to_hex(expected_sha1));
- return -1;
- }
-
- the_hash_algo->final_fn(real_sha1, &c);
- if (hashcmp(expected_sha1, real_sha1)) {
- error("sha1 mismatch for %s (expected %s)", path,
- sha1_to_hex(expected_sha1));
- return -1;
- }
-
- return 0;
-}
-
-int read_loose_object(const char *path,
- const struct object_id *expected_oid,
- enum object_type *type,
- unsigned long *size,
- void **contents)
-{
- int ret = -1;
- void *map = NULL;
- unsigned long mapsize;
- git_zstream stream;
- char hdr[MAX_HEADER_LEN];
-
- *contents = NULL;
-
- map = map_sha1_file_1(the_repository, path, NULL, &mapsize);
- if (!map) {
- error_errno("unable to mmap %s", path);
- goto out;
- }
-
- if (unpack_sha1_header(&stream, map, mapsize, hdr, sizeof(hdr)) < 0) {
- error("unable to unpack header of %s", path);
- goto out;
- }
-
- *type = parse_sha1_header(hdr, size);
- if (*type < 0) {
- error("unable to parse header of %s", path);
- git_inflate_end(&stream);
- goto out;
- }
-
- if (*type == OBJ_BLOB) {
- if (check_stream_sha1(&stream, hdr, *size, path, expected_oid->hash) < 0)
- goto out;
- } else {
- *contents = unpack_sha1_rest(&stream, hdr, *size, expected_oid->hash);
- if (!*contents) {
- error("unable to unpack contents of %s", path);
- git_inflate_end(&stream);
- goto out;
- }
- if (check_object_signature(expected_oid, *contents,
- *size, type_name(*type))) {
- error("sha1 mismatch for %s (expected %s)", path,
- oid_to_hex(expected_oid));
- free(*contents);
- goto out;
- }
- }
-
- ret = 0; /* everything checks out */
-
-out:
- if (map)
- munmap(map, mapsize);
- return ret;
-}
+++ /dev/null
-#include "cache.h"
-#include "config.h"
-#include "tag.h"
-#include "commit.h"
-#include "tree.h"
-#include "blob.h"
-#include "tree-walk.h"
-#include "refs.h"
-#include "remote.h"
-#include "dir.h"
-#include "sha1-array.h"
-#include "packfile.h"
-#include "object-store.h"
-#include "repository.h"
-
-static int get_oid_oneline(const char *, struct object_id *, struct commit_list *);
-
-typedef int (*disambiguate_hint_fn)(const struct object_id *, void *);
-
-struct disambiguate_state {
- int len; /* length of prefix in hex chars */
- char hex_pfx[GIT_MAX_HEXSZ + 1];
- struct object_id bin_pfx;
-
- disambiguate_hint_fn fn;
- void *cb_data;
- struct object_id candidate;
- unsigned candidate_exists:1;
- unsigned candidate_checked:1;
- unsigned candidate_ok:1;
- unsigned disambiguate_fn_used:1;
- unsigned ambiguous:1;
- unsigned always_call_fn:1;
-};
-
-static void update_candidates(struct disambiguate_state *ds, const struct object_id *current)
-{
- if (ds->always_call_fn) {
- ds->ambiguous = ds->fn(current, ds->cb_data) ? 1 : 0;
- return;
- }
- if (!ds->candidate_exists) {
- /* this is the first candidate */
- oidcpy(&ds->candidate, current);
- ds->candidate_exists = 1;
- return;
- } else if (!oidcmp(&ds->candidate, current)) {
- /* the same as what we already have seen */
- return;
- }
-
- if (!ds->fn) {
- /* cannot disambiguate between ds->candidate and current */
- ds->ambiguous = 1;
- return;
- }
-
- if (!ds->candidate_checked) {
- ds->candidate_ok = ds->fn(&ds->candidate, ds->cb_data);
- ds->disambiguate_fn_used = 1;
- ds->candidate_checked = 1;
- }
-
- if (!ds->candidate_ok) {
- /* discard the candidate; we know it does not satisfy fn */
- oidcpy(&ds->candidate, current);
- ds->candidate_checked = 0;
- return;
- }
-
- /* if we reach this point, we know ds->candidate satisfies fn */
- if (ds->fn(current, ds->cb_data)) {
- /*
- * if both current and candidate satisfy fn, we cannot
- * disambiguate.
- */
- ds->candidate_ok = 0;
- ds->ambiguous = 1;
- }
-
- /* otherwise, current can be discarded and candidate is still good */
-}
-
-static int append_loose_object(const struct object_id *oid, const char *path,
- void *data)
-{
- oid_array_append(data, oid);
- return 0;
-}
-
-static int match_sha(unsigned, const unsigned char *, const unsigned char *);
-
-static void find_short_object_filename(struct disambiguate_state *ds)
-{
- int subdir_nr = ds->bin_pfx.hash[0];
- struct alternate_object_database *alt;
- static struct alternate_object_database *fakeent;
-
- if (!fakeent) {
- /*
- * Create a "fake" alternate object database that
- * points to our own object database, to make it
- * easier to get a temporary working space in
- * alt->name/alt->base while iterating over the
- * object databases including our own.
- */
- fakeent = alloc_alt_odb(get_object_directory());
- }
- fakeent->next = the_repository->objects->alt_odb_list;
-
- for (alt = fakeent; alt && !ds->ambiguous; alt = alt->next) {
- int pos;
-
- if (!alt->loose_objects_subdir_seen[subdir_nr]) {
- struct strbuf *buf = alt_scratch_buf(alt);
- for_each_file_in_obj_subdir(subdir_nr, buf,
- append_loose_object,
- NULL, NULL,
- &alt->loose_objects_cache);
- alt->loose_objects_subdir_seen[subdir_nr] = 1;
- }
-
- pos = oid_array_lookup(&alt->loose_objects_cache, &ds->bin_pfx);
- if (pos < 0)
- pos = -1 - pos;
- while (!ds->ambiguous && pos < alt->loose_objects_cache.nr) {
- const struct object_id *oid;
- oid = alt->loose_objects_cache.oid + pos;
- if (!match_sha(ds->len, ds->bin_pfx.hash, oid->hash))
- break;
- update_candidates(ds, oid);
- pos++;
- }
- }
-}
-
-static int match_sha(unsigned len, const unsigned char *a, const unsigned char *b)
-{
- do {
- if (*a != *b)
- return 0;
- a++;
- b++;
- len -= 2;
- } while (len > 1);
- if (len)
- if ((*a ^ *b) & 0xf0)
- return 0;
- return 1;
-}
-
-static void unique_in_pack(struct packed_git *p,
- struct disambiguate_state *ds)
-{
- uint32_t num, i, first = 0;
- const struct object_id *current = NULL;
-
- if (open_pack_index(p) || !p->num_objects)
- return;
-
- num = p->num_objects;
- bsearch_pack(&ds->bin_pfx, p, &first);
-
- /*
- * At this point, "first" is the location of the lowest object
- * with an object name that could match "bin_pfx". See if we have
- * 0, 1 or more objects that actually match(es).
- */
- for (i = first; i < num && !ds->ambiguous; i++) {
- struct object_id oid;
- current = nth_packed_object_oid(&oid, p, i);
- if (!match_sha(ds->len, ds->bin_pfx.hash, current->hash))
- break;
- update_candidates(ds, current);
- }
-}
-
-static void find_short_packed_object(struct disambiguate_state *ds)
-{
- struct packed_git *p;
-
- for (p = get_packed_git(the_repository); p && !ds->ambiguous;
- p = p->next)
- unique_in_pack(p, ds);
-}
-
-#define SHORT_NAME_NOT_FOUND (-1)
-#define SHORT_NAME_AMBIGUOUS (-2)
-
-static int finish_object_disambiguation(struct disambiguate_state *ds,
- struct object_id *oid)
-{
- if (ds->ambiguous)
- return SHORT_NAME_AMBIGUOUS;
-
- if (!ds->candidate_exists)
- return SHORT_NAME_NOT_FOUND;
-
- if (!ds->candidate_checked)
- /*
- * If this is the only candidate, there is no point
- * calling the disambiguation hint callback.
- *
- * On the other hand, if the current candidate
- * replaced an earlier candidate that did _not_ pass
- * the disambiguation hint callback, then we do have
- * more than one objects that match the short name
- * given, so we should make sure this one matches;
- * otherwise, if we discovered this one and the one
- * that we previously discarded in the reverse order,
- * we would end up showing different results in the
- * same repository!
- */
- ds->candidate_ok = (!ds->disambiguate_fn_used ||
- ds->fn(&ds->candidate, ds->cb_data));
-
- if (!ds->candidate_ok)
- return SHORT_NAME_AMBIGUOUS;
-
- oidcpy(oid, &ds->candidate);
- return 0;
-}
-
-static int disambiguate_commit_only(const struct object_id *oid, void *cb_data_unused)
-{
- int kind = oid_object_info(oid, NULL);
- return kind == OBJ_COMMIT;
-}
-
-static int disambiguate_committish_only(const struct object_id *oid, void *cb_data_unused)
-{
- struct object *obj;
- int kind;
-
- kind = oid_object_info(oid, NULL);
- if (kind == OBJ_COMMIT)
- return 1;
- if (kind != OBJ_TAG)
- return 0;
-
- /* We need to do this the hard way... */
- obj = deref_tag(parse_object(oid), NULL, 0);
- if (obj && obj->type == OBJ_COMMIT)
- return 1;
- return 0;
-}
-
-static int disambiguate_tree_only(const struct object_id *oid, void *cb_data_unused)
-{
- int kind = oid_object_info(oid, NULL);
- return kind == OBJ_TREE;
-}
-
-static int disambiguate_treeish_only(const struct object_id *oid, void *cb_data_unused)
-{
- struct object *obj;
- int kind;
-
- kind = oid_object_info(oid, NULL);
- if (kind == OBJ_TREE || kind == OBJ_COMMIT)
- return 1;
- if (kind != OBJ_TAG)
- return 0;
-
- /* We need to do this the hard way... */
- obj = deref_tag(parse_object(oid), NULL, 0);
- if (obj && (obj->type == OBJ_TREE || obj->type == OBJ_COMMIT))
- return 1;
- return 0;
-}
-
-static int disambiguate_blob_only(const struct object_id *oid, void *cb_data_unused)
-{
- int kind = oid_object_info(oid, NULL);
- return kind == OBJ_BLOB;
-}
-
-static disambiguate_hint_fn default_disambiguate_hint;
-
-int set_disambiguate_hint_config(const char *var, const char *value)
-{
- static const struct {
- const char *name;
- disambiguate_hint_fn fn;
- } hints[] = {
- { "none", NULL },
- { "commit", disambiguate_commit_only },
- { "committish", disambiguate_committish_only },
- { "tree", disambiguate_tree_only },
- { "treeish", disambiguate_treeish_only },
- { "blob", disambiguate_blob_only }
- };
- int i;
-
- if (!value)
- return config_error_nonbool(var);
-
- for (i = 0; i < ARRAY_SIZE(hints); i++) {
- if (!strcasecmp(value, hints[i].name)) {
- default_disambiguate_hint = hints[i].fn;
- return 0;
- }
- }
-
- return error("unknown hint type for '%s': %s", var, value);
-}
-
-static int init_object_disambiguation(const char *name, int len,
- struct disambiguate_state *ds)
-{
- int i;
-
- if (len < MINIMUM_ABBREV || len > GIT_SHA1_HEXSZ)
- return -1;
-
- memset(ds, 0, sizeof(*ds));
-
- for (i = 0; i < len ;i++) {
- unsigned char c = name[i];
- unsigned char val;
- if (c >= '0' && c <= '9')
- val = c - '0';
- else if (c >= 'a' && c <= 'f')
- val = c - 'a' + 10;
- else if (c >= 'A' && c <='F') {
- val = c - 'A' + 10;
- c -= 'A' - 'a';
- }
- else
- return -1;
- ds->hex_pfx[i] = c;
- if (!(i & 1))
- val <<= 4;
- ds->bin_pfx.hash[i >> 1] |= val;
- }
-
- ds->len = len;
- ds->hex_pfx[len] = '\0';
- prepare_alt_odb(the_repository);
- return 0;
-}
-
-static int show_ambiguous_object(const struct object_id *oid, void *data)
-{
- const struct disambiguate_state *ds = data;
- struct strbuf desc = STRBUF_INIT;
- int type;
-
-
- if (ds->fn && !ds->fn(oid, ds->cb_data))
- return 0;
-
- type = oid_object_info(oid, NULL);
- if (type == OBJ_COMMIT) {
- struct commit *commit = lookup_commit(oid);
- if (commit) {
- struct pretty_print_context pp = {0};
- pp.date_mode.type = DATE_SHORT;
- format_commit_message(commit, " %ad - %s", &desc, &pp);
- }
- } else if (type == OBJ_TAG) {
- struct tag *tag = lookup_tag(oid);
- if (!parse_tag(tag) && tag->tag)
- strbuf_addf(&desc, " %s", tag->tag);
- }
-
- advise(" %s %s%s",
- find_unique_abbrev(oid, DEFAULT_ABBREV),
- type_name(type) ? type_name(type) : "unknown type",
- desc.buf);
-
- strbuf_release(&desc);
- return 0;
-}
-
-static int get_short_oid(const char *name, int len, struct object_id *oid,
- unsigned flags)
-{
- int status;
- struct disambiguate_state ds;
- int quietly = !!(flags & GET_OID_QUIETLY);
-
- if (init_object_disambiguation(name, len, &ds) < 0)
- return -1;
-
- if (HAS_MULTI_BITS(flags & GET_OID_DISAMBIGUATORS))
- die("BUG: multiple get_short_oid disambiguator flags");
-
- if (flags & GET_OID_COMMIT)
- ds.fn = disambiguate_commit_only;
- else if (flags & GET_OID_COMMITTISH)
- ds.fn = disambiguate_committish_only;
- else if (flags & GET_OID_TREE)
- ds.fn = disambiguate_tree_only;
- else if (flags & GET_OID_TREEISH)
- ds.fn = disambiguate_treeish_only;
- else if (flags & GET_OID_BLOB)
- ds.fn = disambiguate_blob_only;
- else
- ds.fn = default_disambiguate_hint;
-
- find_short_object_filename(&ds);
- find_short_packed_object(&ds);
- status = finish_object_disambiguation(&ds, oid);
-
- if (!quietly && (status == SHORT_NAME_AMBIGUOUS)) {
- error(_("short SHA1 %s is ambiguous"), ds.hex_pfx);
-
- /*
- * We may still have ambiguity if we simply saw a series of
- * candidates that did not satisfy our hint function. In
- * that case, we still want to show them, so disable the hint
- * function entirely.
- */
- if (!ds.ambiguous)
- ds.fn = NULL;
-
- advise(_("The candidates are:"));
- for_each_abbrev(ds.hex_pfx, show_ambiguous_object, &ds);
- }
-
- return status;
-}
-
-static int collect_ambiguous(const struct object_id *oid, void *data)
-{
- oid_array_append(data, oid);
- return 0;
-}
-
-int for_each_abbrev(const char *prefix, each_abbrev_fn fn, void *cb_data)
-{
- struct oid_array collect = OID_ARRAY_INIT;
- struct disambiguate_state ds;
- int ret;
-
- if (init_object_disambiguation(prefix, strlen(prefix), &ds) < 0)
- return -1;
-
- ds.always_call_fn = 1;
- ds.fn = collect_ambiguous;
- ds.cb_data = &collect;
- find_short_object_filename(&ds);
- find_short_packed_object(&ds);
-
- ret = oid_array_for_each_unique(&collect, fn, cb_data);
- oid_array_clear(&collect);
- return ret;
-}
-
-/*
- * Return the slot of the most-significant bit set in "val". There are various
- * ways to do this quickly with fls() or __builtin_clzl(), but speed is
- * probably not a big deal here.
- */
-static unsigned msb(unsigned long val)
-{
- unsigned r = 0;
- while (val >>= 1)
- r++;
- return r;
-}
-
-struct min_abbrev_data {
- unsigned int init_len;
- unsigned int cur_len;
- char *hex;
- const struct object_id *oid;
-};
-
-static inline char get_hex_char_from_oid(const struct object_id *oid,
- unsigned int pos)
-{
- static const char hex[] = "0123456789abcdef";
-
- if ((pos & 1) == 0)
- return hex[oid->hash[pos >> 1] >> 4];
- else
- return hex[oid->hash[pos >> 1] & 0xf];
-}
-
-static int extend_abbrev_len(const struct object_id *oid, void *cb_data)
-{
- struct min_abbrev_data *mad = cb_data;
-
- unsigned int i = mad->init_len;
- while (mad->hex[i] && mad->hex[i] == get_hex_char_from_oid(oid, i))
- i++;
-
- if (i < GIT_MAX_RAWSZ && i >= mad->cur_len)
- mad->cur_len = i + 1;
-
- return 0;
-}
-
-static void find_abbrev_len_for_pack(struct packed_git *p,
- struct min_abbrev_data *mad)
-{
- int match = 0;
- uint32_t num, first = 0;
- struct object_id oid;
- const struct object_id *mad_oid;
-
- if (open_pack_index(p) || !p->num_objects)
- return;
-
- num = p->num_objects;
- mad_oid = mad->oid;
- match = bsearch_pack(mad_oid, p, &first);
-
- /*
- * first is now the position in the packfile where we would insert
- * mad->hash if it does not exist (or the position of mad->hash if
- * it does exist). Hence, we consider a maximum of two objects
- * nearby for the abbreviation length.
- */
- mad->init_len = 0;
- if (!match) {
- if (nth_packed_object_oid(&oid, p, first))
- extend_abbrev_len(&oid, mad);
- } else if (first < num - 1) {
- if (nth_packed_object_oid(&oid, p, first + 1))
- extend_abbrev_len(&oid, mad);
- }
- if (first > 0) {
- if (nth_packed_object_oid(&oid, p, first - 1))
- extend_abbrev_len(&oid, mad);
- }
- mad->init_len = mad->cur_len;
-}
-
-static void find_abbrev_len_packed(struct min_abbrev_data *mad)
-{
- struct packed_git *p;
-
- for (p = get_packed_git(the_repository); p; p = p->next)
- find_abbrev_len_for_pack(p, mad);
-}
-
-int find_unique_abbrev_r(char *hex, const struct object_id *oid, int len)
-{
- struct disambiguate_state ds;
- struct min_abbrev_data mad;
- struct object_id oid_ret;
- if (len < 0) {
- unsigned long count = approximate_object_count();
- /*
- * Add one because the MSB only tells us the highest bit set,
- * not including the value of all the _other_ bits (so "15"
- * is only one off of 2^4, but the MSB is the 3rd bit.
- */
- len = msb(count) + 1;
- /*
- * We now know we have on the order of 2^len objects, which
- * expects a collision at 2^(len/2). But we also care about hex
- * chars, not bits, and there are 4 bits per hex. So all
- * together we need to divide by 2 and round up.
- */
- len = DIV_ROUND_UP(len, 2);
- /*
- * For very small repos, we stick with our regular fallback.
- */
- if (len < FALLBACK_DEFAULT_ABBREV)
- len = FALLBACK_DEFAULT_ABBREV;
- }
-
- oid_to_hex_r(hex, oid);
- if (len == GIT_SHA1_HEXSZ || !len)
- return GIT_SHA1_HEXSZ;
-
- mad.init_len = len;
- mad.cur_len = len;
- mad.hex = hex;
- mad.oid = oid;
-
- find_abbrev_len_packed(&mad);
-
- if (init_object_disambiguation(hex, mad.cur_len, &ds) < 0)
- return -1;
-
- ds.fn = extend_abbrev_len;
- ds.always_call_fn = 1;
- ds.cb_data = (void *)&mad;
-
- find_short_object_filename(&ds);
- (void)finish_object_disambiguation(&ds, &oid_ret);
-
- hex[mad.cur_len] = 0;
- return mad.cur_len;
-}
-
-const char *find_unique_abbrev(const struct object_id *oid, int len)
-{
- static int bufno;
- static char hexbuffer[4][GIT_MAX_HEXSZ + 1];
- char *hex = hexbuffer[bufno];
- bufno = (bufno + 1) % ARRAY_SIZE(hexbuffer);
- find_unique_abbrev_r(hex, oid, len);
- return hex;
-}
-
-static int ambiguous_path(const char *path, int len)
-{
- int slash = 1;
- int cnt;
-
- for (cnt = 0; cnt < len; cnt++) {
- switch (*path++) {
- case '\0':
- break;
- case '/':
- if (slash)
- break;
- slash = 1;
- continue;
- case '.':
- continue;
- default:
- slash = 0;
- continue;
- }
- break;
- }
- return slash;
-}
-
-static inline int at_mark(const char *string, int len,
- const char **suffix, int nr)
-{
- int i;
-
- for (i = 0; i < nr; i++) {
- int suffix_len = strlen(suffix[i]);
- if (suffix_len <= len
- && !strncasecmp(string, suffix[i], suffix_len))
- return suffix_len;
- }
- return 0;
-}
-
-static inline int upstream_mark(const char *string, int len)
-{
- const char *suffix[] = { "@{upstream}", "@{u}" };
- return at_mark(string, len, suffix, ARRAY_SIZE(suffix));
-}
-
-static inline int push_mark(const char *string, int len)
-{
- const char *suffix[] = { "@{push}" };
- return at_mark(string, len, suffix, ARRAY_SIZE(suffix));
-}
-
-static int get_oid_1(const char *name, int len, struct object_id *oid, unsigned lookup_flags);
-static int interpret_nth_prior_checkout(const char *name, int namelen, struct strbuf *buf);
-
-static int get_oid_basic(const char *str, int len, struct object_id *oid,
- unsigned int flags)
-{
- static const char *warn_msg = "refname '%.*s' is ambiguous.";
- static const char *object_name_msg = N_(
- "Git normally never creates a ref that ends with 40 hex characters\n"
- "because it will be ignored when you just specify 40-hex. These refs\n"
- "may be created by mistake. For example,\n"
- "\n"
- " git checkout -b $br $(git rev-parse ...)\n"
- "\n"
- "where \"$br\" is somehow empty and a 40-hex ref is created. Please\n"
- "examine these refs and maybe delete them. Turn this message off by\n"
- "running \"git config advice.objectNameWarning false\"");
- struct object_id tmp_oid;
- char *real_ref = NULL;
- int refs_found = 0;
- int at, reflog_len, nth_prior = 0;
-
- if (len == GIT_SHA1_HEXSZ && !get_oid_hex(str, oid)) {
- if (warn_ambiguous_refs && warn_on_object_refname_ambiguity) {
- refs_found = dwim_ref(str, len, &tmp_oid, &real_ref);
- if (refs_found > 0) {
- warning(warn_msg, len, str);
- if (advice_object_name_warning)
- fprintf(stderr, "%s\n", _(object_name_msg));
- }
- free(real_ref);
- }
- return 0;
- }
-
- /* basic@{time or number or -number} format to query ref-log */
- reflog_len = at = 0;
- if (len && str[len-1] == '}') {
- for (at = len-4; at >= 0; at--) {
- if (str[at] == '@' && str[at+1] == '{') {
- if (str[at+2] == '-') {
- if (at != 0)
- /* @{-N} not at start */
- return -1;
- nth_prior = 1;
- continue;
- }
- if (!upstream_mark(str + at, len - at) &&
- !push_mark(str + at, len - at)) {
- reflog_len = (len-1) - (at+2);
- len = at;
- }
- break;
- }
- }
- }
-
- /* Accept only unambiguous ref paths. */
- if (len && ambiguous_path(str, len))
- return -1;
-
- if (nth_prior) {
- struct strbuf buf = STRBUF_INIT;
- int detached;
-
- if (interpret_nth_prior_checkout(str, len, &buf) > 0) {
- detached = (buf.len == GIT_SHA1_HEXSZ && !get_oid_hex(buf.buf, oid));
- strbuf_release(&buf);
- if (detached)
- return 0;
- }
- }
-
- if (!len && reflog_len)
- /* allow "@{...}" to mean the current branch reflog */
- refs_found = dwim_ref("HEAD", 4, oid, &real_ref);
- else if (reflog_len)
- refs_found = dwim_log(str, len, oid, &real_ref);
- else
- refs_found = dwim_ref(str, len, oid, &real_ref);
-
- if (!refs_found)
- return -1;
-
- if (warn_ambiguous_refs && !(flags & GET_OID_QUIETLY) &&
- (refs_found > 1 ||
- !get_short_oid(str, len, &tmp_oid, GET_OID_QUIETLY)))
- warning(warn_msg, len, str);
-
- if (reflog_len) {
- int nth, i;
- timestamp_t at_time;
- timestamp_t co_time;
- int co_tz, co_cnt;
-
- /* Is it asking for N-th entry, or approxidate? */
- for (i = nth = 0; 0 <= nth && i < reflog_len; i++) {
- char ch = str[at+2+i];
- if ('0' <= ch && ch <= '9')
- nth = nth * 10 + ch - '0';
- else
- nth = -1;
- }
- if (100000000 <= nth) {
- at_time = nth;
- nth = -1;
- } else if (0 <= nth)
- at_time = 0;
- else {
- int errors = 0;
- char *tmp = xstrndup(str + at + 2, reflog_len);
- at_time = approxidate_careful(tmp, &errors);
- free(tmp);
- if (errors) {
- free(real_ref);
- return -1;
- }
- }
- if (read_ref_at(real_ref, flags, at_time, nth, oid, NULL,
- &co_time, &co_tz, &co_cnt)) {
- if (!len) {
- if (starts_with(real_ref, "refs/heads/")) {
- str = real_ref + 11;
- len = strlen(real_ref + 11);
- } else {
- /* detached HEAD */
- str = "HEAD";
- len = 4;
- }
- }
- if (at_time) {
- if (!(flags & GET_OID_QUIETLY)) {
- warning("Log for '%.*s' only goes "
- "back to %s.", len, str,
- show_date(co_time, co_tz, DATE_MODE(RFC2822)));
- }
- } else {
- if (flags & GET_OID_QUIETLY) {
- exit(128);
- }
- die("Log for '%.*s' only has %d entries.",
- len, str, co_cnt);
- }
- }
- }
-
- free(real_ref);
- return 0;
-}
-
-static int get_parent(const char *name, int len,
- struct object_id *result, int idx)
-{
- struct object_id oid;
- int ret = get_oid_1(name, len, &oid, GET_OID_COMMITTISH);
- struct commit *commit;
- struct commit_list *p;
-
- if (ret)
- return ret;
- commit = lookup_commit_reference(&oid);
- if (parse_commit(commit))
- return -1;
- if (!idx) {
- oidcpy(result, &commit->object.oid);
- return 0;
- }
- p = commit->parents;
- while (p) {
- if (!--idx) {
- oidcpy(result, &p->item->object.oid);
- return 0;
- }
- p = p->next;
- }
- return -1;
-}
-
-static int get_nth_ancestor(const char *name, int len,
- struct object_id *result, int generation)
-{
- struct object_id oid;
- struct commit *commit;
- int ret;
-
- ret = get_oid_1(name, len, &oid, GET_OID_COMMITTISH);
- if (ret)
- return ret;
- commit = lookup_commit_reference(&oid);
- if (!commit)
- return -1;
-
- while (generation--) {
- if (parse_commit(commit) || !commit->parents)
- return -1;
- commit = commit->parents->item;
- }
- oidcpy(result, &commit->object.oid);
- return 0;
-}
-
-struct object *peel_to_type(const char *name, int namelen,
- struct object *o, enum object_type expected_type)
-{
- if (name && !namelen)
- namelen = strlen(name);
- while (1) {
- if (!o || (!o->parsed && !parse_object(&o->oid)))
- return NULL;
- if (expected_type == OBJ_ANY || o->type == expected_type)
- return o;
- if (o->type == OBJ_TAG)
- o = ((struct tag*) o)->tagged;
- else if (o->type == OBJ_COMMIT)
- o = &(((struct commit *) o)->tree->object);
- else {
- if (name)
- error("%.*s: expected %s type, but the object "
- "dereferences to %s type",
- namelen, name, type_name(expected_type),
- type_name(o->type));
- return NULL;
- }
- }
-}
-
-static int peel_onion(const char *name, int len, struct object_id *oid,
- unsigned lookup_flags)
-{
- struct object_id outer;
- const char *sp;
- unsigned int expected_type = 0;
- struct object *o;
-
- /*
- * "ref^{type}" dereferences ref repeatedly until you cannot
- * dereference anymore, or you get an object of given type,
- * whichever comes first. "ref^{}" means just dereference
- * tags until you get a non-tag. "ref^0" is a shorthand for
- * "ref^{commit}". "commit^{tree}" could be used to find the
- * top-level tree of the given commit.
- */
- if (len < 4 || name[len-1] != '}')
- return -1;
-
- for (sp = name + len - 1; name <= sp; sp--) {
- int ch = *sp;
- if (ch == '{' && name < sp && sp[-1] == '^')
- break;
- }
- if (sp <= name)
- return -1;
-
- sp++; /* beginning of type name, or closing brace for empty */
- if (starts_with(sp, "commit}"))
- expected_type = OBJ_COMMIT;
- else if (starts_with(sp, "tag}"))
- expected_type = OBJ_TAG;
- else if (starts_with(sp, "tree}"))
- expected_type = OBJ_TREE;
- else if (starts_with(sp, "blob}"))
- expected_type = OBJ_BLOB;
- else if (starts_with(sp, "object}"))
- expected_type = OBJ_ANY;
- else if (sp[0] == '}')
- expected_type = OBJ_NONE;
- else if (sp[0] == '/')
- expected_type = OBJ_COMMIT;
- else
- return -1;
-
- lookup_flags &= ~GET_OID_DISAMBIGUATORS;
- if (expected_type == OBJ_COMMIT)
- lookup_flags |= GET_OID_COMMITTISH;
- else if (expected_type == OBJ_TREE)
- lookup_flags |= GET_OID_TREEISH;
-
- if (get_oid_1(name, sp - name - 2, &outer, lookup_flags))
- return -1;
-
- o = parse_object(&outer);
- if (!o)
- return -1;
- if (!expected_type) {
- o = deref_tag(o, name, sp - name - 2);
- if (!o || (!o->parsed && !parse_object(&o->oid)))
- return -1;
- oidcpy(oid, &o->oid);
- return 0;
- }
-
- /*
- * At this point, the syntax look correct, so
- * if we do not get the needed object, we should
- * barf.
- */
- o = peel_to_type(name, len, o, expected_type);
- if (!o)
- return -1;
-
- oidcpy(oid, &o->oid);
- if (sp[0] == '/') {
- /* "$commit^{/foo}" */
- char *prefix;
- int ret;
- struct commit_list *list = NULL;
-
- /*
- * $commit^{/}. Some regex implementation may reject.
- * We don't need regex anyway. '' pattern always matches.
- */
- if (sp[1] == '}')
- return 0;
-
- prefix = xstrndup(sp + 1, name + len - 1 - (sp + 1));
- commit_list_insert((struct commit *)o, &list);
- ret = get_oid_oneline(prefix, oid, list);
- free(prefix);
- return ret;
- }
- return 0;
-}
-
-static int get_describe_name(const char *name, int len, struct object_id *oid)
-{
- const char *cp;
- unsigned flags = GET_OID_QUIETLY | GET_OID_COMMIT;
-
- for (cp = name + len - 1; name + 2 <= cp; cp--) {
- char ch = *cp;
- if (!isxdigit(ch)) {
- /* We must be looking at g in "SOMETHING-g"
- * for it to be describe output.
- */
- if (ch == 'g' && cp[-1] == '-') {
- cp++;
- len -= cp - name;
- return get_short_oid(cp, len, oid, flags);
- }
- }
- }
- return -1;
-}
-
-static int get_oid_1(const char *name, int len, struct object_id *oid, unsigned lookup_flags)
-{
- int ret, has_suffix;
- const char *cp;
-
- /*
- * "name~3" is "name^^^", "name~" is "name~1", and "name^" is "name^1".
- */
- has_suffix = 0;
- for (cp = name + len - 1; name <= cp; cp--) {
- int ch = *cp;
- if ('0' <= ch && ch <= '9')
- continue;
- if (ch == '~' || ch == '^')
- has_suffix = ch;
- break;
- }
-
- if (has_suffix) {
- int num = 0;
- int len1 = cp - name;
- cp++;
- while (cp < name + len)
- num = num * 10 + *cp++ - '0';
- if (!num && len1 == len - 1)
- num = 1;
- if (has_suffix == '^')
- return get_parent(name, len1, oid, num);
- /* else if (has_suffix == '~') -- goes without saying */
- return get_nth_ancestor(name, len1, oid, num);
- }
-
- ret = peel_onion(name, len, oid, lookup_flags);
- if (!ret)
- return 0;
-
- ret = get_oid_basic(name, len, oid, lookup_flags);
- if (!ret)
- return 0;
-
- /* It could be describe output that is "SOMETHING-gXXXX" */
- ret = get_describe_name(name, len, oid);
- if (!ret)
- return 0;
-
- return get_short_oid(name, len, oid, lookup_flags);
-}
-
-/*
- * This interprets names like ':/Initial revision of "git"' by searching
- * through history and returning the first commit whose message starts
- * the given regular expression.
- *
- * For negative-matching, prefix the pattern-part with '!-', like: ':/!-WIP'.
- *
- * For a literal '!' character at the beginning of a pattern, you have to repeat
- * that, like: ':/!!foo'
- *
- * For future extension, all other sequences beginning with ':/!' are reserved.
- */
-
-/* Remember to update object flag allocation in object.h */
-#define ONELINE_SEEN (1u<<20)
-
-static int handle_one_ref(const char *path, const struct object_id *oid,
- int flag, void *cb_data)
-{
- struct commit_list **list = cb_data;
- struct object *object = parse_object(oid);
- if (!object)
- return 0;
- if (object->type == OBJ_TAG) {
- object = deref_tag(object, path, strlen(path));
- if (!object)
- return 0;
- }
- if (object->type != OBJ_COMMIT)
- return 0;
- commit_list_insert((struct commit *)object, list);
- return 0;
-}
-
-static int get_oid_oneline(const char *prefix, struct object_id *oid,
- struct commit_list *list)
-{
- struct commit_list *backup = NULL, *l;
- int found = 0;
- int negative = 0;
- regex_t regex;
-
- if (prefix[0] == '!') {
- prefix++;
-
- if (prefix[0] == '-') {
- prefix++;
- negative = 1;
- } else if (prefix[0] != '!') {
- return -1;
- }
- }
-
- if (regcomp(®ex, prefix, REG_EXTENDED))
- return -1;
-
- for (l = list; l; l = l->next) {
- l->item->object.flags |= ONELINE_SEEN;
- commit_list_insert(l->item, &backup);
- }
- while (list) {
- const char *p, *buf;
- struct commit *commit;
- int matches;
-
- commit = pop_most_recent_commit(&list, ONELINE_SEEN);
- if (!parse_object(&commit->object.oid))
- continue;
- buf = get_commit_buffer(commit, NULL);
- p = strstr(buf, "\n\n");
- matches = negative ^ (p && !regexec(®ex, p + 2, 0, NULL, 0));
- unuse_commit_buffer(commit, buf);
-
- if (matches) {
- oidcpy(oid, &commit->object.oid);
- found = 1;
- break;
- }
- }
- regfree(®ex);
- free_commit_list(list);
- for (l = backup; l; l = l->next)
- clear_commit_marks(l->item, ONELINE_SEEN);
- free_commit_list(backup);
- return found ? 0 : -1;
-}
-
-struct grab_nth_branch_switch_cbdata {
- int remaining;
- struct strbuf buf;
-};
-
-static int grab_nth_branch_switch(struct object_id *ooid, struct object_id *noid,
- const char *email, timestamp_t timestamp, int tz,
- const char *message, void *cb_data)
-{
- struct grab_nth_branch_switch_cbdata *cb = cb_data;
- const char *match = NULL, *target = NULL;
- size_t len;
-
- if (skip_prefix(message, "checkout: moving from ", &match))
- target = strstr(match, " to ");
-
- if (!match || !target)
- return 0;
- if (--(cb->remaining) == 0) {
- len = target - match;
- strbuf_reset(&cb->buf);
- strbuf_add(&cb->buf, match, len);
- return 1; /* we are done */
- }
- return 0;
-}
-
-/*
- * Parse @{-N} syntax, return the number of characters parsed
- * if successful; otherwise signal an error with negative value.
- */
-static int interpret_nth_prior_checkout(const char *name, int namelen,
- struct strbuf *buf)
-{
- long nth;
- int retval;
- struct grab_nth_branch_switch_cbdata cb;
- const char *brace;
- char *num_end;
-
- if (namelen < 4)
- return -1;
- if (name[0] != '@' || name[1] != '{' || name[2] != '-')
- return -1;
- brace = memchr(name, '}', namelen);
- if (!brace)
- return -1;
- nth = strtol(name + 3, &num_end, 10);
- if (num_end != brace)
- return -1;
- if (nth <= 0)
- return -1;
- cb.remaining = nth;
- strbuf_init(&cb.buf, 20);
-
- retval = 0;
- if (0 < for_each_reflog_ent_reverse("HEAD", grab_nth_branch_switch, &cb)) {
- strbuf_reset(buf);
- strbuf_addbuf(buf, &cb.buf);
- retval = brace - name + 1;
- }
-
- strbuf_release(&cb.buf);
- return retval;
-}
-
-int get_oid_mb(const char *name, struct object_id *oid)
-{
- struct commit *one, *two;
- struct commit_list *mbs;
- struct object_id oid_tmp;
- const char *dots;
- int st;
-
- dots = strstr(name, "...");
- if (!dots)
- return get_oid(name, oid);
- if (dots == name)
- st = get_oid("HEAD", &oid_tmp);
- else {
- struct strbuf sb;
- strbuf_init(&sb, dots - name);
- strbuf_add(&sb, name, dots - name);
- st = get_oid_committish(sb.buf, &oid_tmp);
- strbuf_release(&sb);
- }
- if (st)
- return st;
- one = lookup_commit_reference_gently(&oid_tmp, 0);
- if (!one)
- return -1;
-
- if (get_oid_committish(dots[3] ? (dots + 3) : "HEAD", &oid_tmp))
- return -1;
- two = lookup_commit_reference_gently(&oid_tmp, 0);
- if (!two)
- return -1;
- mbs = get_merge_bases(one, two);
- if (!mbs || mbs->next)
- st = -1;
- else {
- st = 0;
- oidcpy(oid, &mbs->item->object.oid);
- }
- free_commit_list(mbs);
- return st;
-}
-
-/* parse @something syntax, when 'something' is not {.*} */
-static int interpret_empty_at(const char *name, int namelen, int len, struct strbuf *buf)
-{
- const char *next;
-
- if (len || name[1] == '{')
- return -1;
-
- /* make sure it's a single @, or @@{.*}, not @foo */
- next = memchr(name + len + 1, '@', namelen - len - 1);
- if (next && next[1] != '{')
- return -1;
- if (!next)
- next = name + namelen;
- if (next != name + 1)
- return -1;
-
- strbuf_reset(buf);
- strbuf_add(buf, "HEAD", 4);
- return 1;
-}
-
-static int reinterpret(const char *name, int namelen, int len,
- struct strbuf *buf, unsigned allowed)
-{
- /* we have extra data, which might need further processing */
- struct strbuf tmp = STRBUF_INIT;
- int used = buf->len;
- int ret;
-
- strbuf_add(buf, name + len, namelen - len);
- ret = interpret_branch_name(buf->buf, buf->len, &tmp, allowed);
- /* that data was not interpreted, remove our cruft */
- if (ret < 0) {
- strbuf_setlen(buf, used);
- return len;
- }
- strbuf_reset(buf);
- strbuf_addbuf(buf, &tmp);
- strbuf_release(&tmp);
- /* tweak for size of {-N} versus expanded ref name */
- return ret - used + len;
-}
-
-static void set_shortened_ref(struct strbuf *buf, const char *ref)
-{
- char *s = shorten_unambiguous_ref(ref, 0);
- strbuf_reset(buf);
- strbuf_addstr(buf, s);
- free(s);
-}
-
-static int branch_interpret_allowed(const char *refname, unsigned allowed)
-{
- if (!allowed)
- return 1;
-
- if ((allowed & INTERPRET_BRANCH_LOCAL) &&
- starts_with(refname, "refs/heads/"))
- return 1;
- if ((allowed & INTERPRET_BRANCH_REMOTE) &&
- starts_with(refname, "refs/remotes/"))
- return 1;
-
- return 0;
-}
-
-static int interpret_branch_mark(const char *name, int namelen,
- int at, struct strbuf *buf,
- int (*get_mark)(const char *, int),
- const char *(*get_data)(struct branch *,
- struct strbuf *),
- unsigned allowed)
-{
- int len;
- struct branch *branch;
- struct strbuf err = STRBUF_INIT;
- const char *value;
-
- len = get_mark(name + at, namelen - at);
- if (!len)
- return -1;
-
- if (memchr(name, ':', at))
- return -1;
-
- if (at) {
- char *name_str = xmemdupz(name, at);
- branch = branch_get(name_str);
- free(name_str);
- } else
- branch = branch_get(NULL);
-
- value = get_data(branch, &err);
- if (!value)
- die("%s", err.buf);
-
- if (!branch_interpret_allowed(value, allowed))
- return -1;
-
- set_shortened_ref(buf, value);
- return len + at;
-}
-
-int interpret_branch_name(const char *name, int namelen, struct strbuf *buf,
- unsigned allowed)
-{
- char *at;
- const char *start;
- int len;
-
- if (!namelen)
- namelen = strlen(name);
-
- if (!allowed || (allowed & INTERPRET_BRANCH_LOCAL)) {
- len = interpret_nth_prior_checkout(name, namelen, buf);
- if (!len) {
- return len; /* syntax Ok, not enough switches */
- } else if (len > 0) {
- if (len == namelen)
- return len; /* consumed all */
- else
- return reinterpret(name, namelen, len, buf, allowed);
- }
- }
-
- for (start = name;
- (at = memchr(start, '@', namelen - (start - name)));
- start = at + 1) {
-
- if (!allowed || (allowed & INTERPRET_BRANCH_HEAD)) {
- len = interpret_empty_at(name, namelen, at - name, buf);
- if (len > 0)
- return reinterpret(name, namelen, len, buf,
- allowed);
- }
-
- len = interpret_branch_mark(name, namelen, at - name, buf,
- upstream_mark, branch_get_upstream,
- allowed);
- if (len > 0)
- return len;
-
- len = interpret_branch_mark(name, namelen, at - name, buf,
- push_mark, branch_get_push,
- allowed);
- if (len > 0)
- return len;
- }
-
- return -1;
-}
-
-void strbuf_branchname(struct strbuf *sb, const char *name, unsigned allowed)
-{
- int len = strlen(name);
- int used = interpret_branch_name(name, len, sb, allowed);
-
- if (used < 0)
- used = 0;
- strbuf_add(sb, name + used, len - used);
-}
-
-int strbuf_check_branch_ref(struct strbuf *sb, const char *name)
-{
- if (startup_info->have_repository)
- strbuf_branchname(sb, name, INTERPRET_BRANCH_LOCAL);
- else
- strbuf_addstr(sb, name);
-
- /*
- * This splice must be done even if we end up rejecting the
- * name; builtin/branch.c::copy_or_rename_branch() still wants
- * to see what the name expanded to so that "branch -m" can be
- * used as a tool to correct earlier mistakes.
- */
- strbuf_splice(sb, 0, 0, "refs/heads/", 11);
-
- if (*name == '-' ||
- !strcmp(sb->buf, "refs/heads/HEAD"))
- return -1;
-
- return check_refname_format(sb->buf, 0);
-}
-
-/*
- * This is like "get_oid_basic()", except it allows "object ID expressions",
- * notably "xyz^" for "parent of xyz"
- */
-int get_oid(const char *name, struct object_id *oid)
-{
- struct object_context unused;
- return get_oid_with_context(name, 0, oid, &unused);
-}
-
-
-/*
- * Many callers know that the user meant to name a commit-ish by
- * syntactical positions where the object name appears. Calling this
- * function allows the machinery to disambiguate shorter-than-unique
- * abbreviated object names between commit-ish and others.
- *
- * Note that this does NOT error out when the named object is not a
- * commit-ish. It is merely to give a hint to the disambiguation
- * machinery.
- */
-int get_oid_committish(const char *name, struct object_id *oid)
-{
- struct object_context unused;
- return get_oid_with_context(name, GET_OID_COMMITTISH,
- oid, &unused);
-}
-
-int get_oid_treeish(const char *name, struct object_id *oid)
-{
- struct object_context unused;
- return get_oid_with_context(name, GET_OID_TREEISH,
- oid, &unused);
-}
-
-int get_oid_commit(const char *name, struct object_id *oid)
-{
- struct object_context unused;
- return get_oid_with_context(name, GET_OID_COMMIT,
- oid, &unused);
-}
-
-int get_oid_tree(const char *name, struct object_id *oid)
-{
- struct object_context unused;
- return get_oid_with_context(name, GET_OID_TREE,
- oid, &unused);
-}
-
-int get_oid_blob(const char *name, struct object_id *oid)
-{
- struct object_context unused;
- return get_oid_with_context(name, GET_OID_BLOB,
- oid, &unused);
-}
-
-/* Must be called only when object_name:filename doesn't exist. */
-static void diagnose_invalid_oid_path(const char *prefix,
- const char *filename,
- const struct object_id *tree_oid,
- const char *object_name,
- int object_name_len)
-{
- struct object_id oid;
- unsigned mode;
-
- if (!prefix)
- prefix = "";
-
- if (file_exists(filename))
- die("Path '%s' exists on disk, but not in '%.*s'.",
- filename, object_name_len, object_name);
- if (is_missing_file_error(errno)) {
- char *fullname = xstrfmt("%s%s", prefix, filename);
-
- if (!get_tree_entry(tree_oid, fullname, &oid, &mode)) {
- die("Path '%s' exists, but not '%s'.\n"
- "Did you mean '%.*s:%s' aka '%.*s:./%s'?",
- fullname,
- filename,
- object_name_len, object_name,
- fullname,
- object_name_len, object_name,
- filename);
- }
- die("Path '%s' does not exist in '%.*s'",
- filename, object_name_len, object_name);
- }
-}
-
-/* Must be called only when :stage:filename doesn't exist. */
-static void diagnose_invalid_index_path(int stage,
- const char *prefix,
- const char *filename)
-{
- const struct cache_entry *ce;
- int pos;
- unsigned namelen = strlen(filename);
- struct strbuf fullname = STRBUF_INIT;
-
- if (!prefix)
- prefix = "";
-
- /* Wrong stage number? */
- pos = cache_name_pos(filename, namelen);
- if (pos < 0)
- pos = -pos - 1;
- if (pos < active_nr) {
- ce = active_cache[pos];
- if (ce_namelen(ce) == namelen &&
- !memcmp(ce->name, filename, namelen))
- die("Path '%s' is in the index, but not at stage %d.\n"
- "Did you mean ':%d:%s'?",
- filename, stage,
- ce_stage(ce), filename);
- }
-
- /* Confusion between relative and absolute filenames? */
- strbuf_addstr(&fullname, prefix);
- strbuf_addstr(&fullname, filename);
- pos = cache_name_pos(fullname.buf, fullname.len);
- if (pos < 0)
- pos = -pos - 1;
- if (pos < active_nr) {
- ce = active_cache[pos];
- if (ce_namelen(ce) == fullname.len &&
- !memcmp(ce->name, fullname.buf, fullname.len))
- die("Path '%s' is in the index, but not '%s'.\n"
- "Did you mean ':%d:%s' aka ':%d:./%s'?",
- fullname.buf, filename,
- ce_stage(ce), fullname.buf,
- ce_stage(ce), filename);
- }
-
- if (file_exists(filename))
- die("Path '%s' exists on disk, but not in the index.", filename);
- if (is_missing_file_error(errno))
- die("Path '%s' does not exist (neither on disk nor in the index).",
- filename);
-
- strbuf_release(&fullname);
-}
-
-
-static char *resolve_relative_path(const char *rel)
-{
- if (!starts_with(rel, "./") && !starts_with(rel, "../"))
- return NULL;
-
- if (!is_inside_work_tree())
- die("relative path syntax can't be used outside working tree.");
-
- /* die() inside prefix_path() if resolved path is outside worktree */
- return prefix_path(startup_info->prefix,
- startup_info->prefix ? strlen(startup_info->prefix) : 0,
- rel);
-}
-
-static int get_oid_with_context_1(const char *name,
- unsigned flags,
- const char *prefix,
- struct object_id *oid,
- struct object_context *oc)
-{
- int ret, bracket_depth;
- int namelen = strlen(name);
- const char *cp;
- int only_to_die = flags & GET_OID_ONLY_TO_DIE;
-
- if (only_to_die)
- flags |= GET_OID_QUIETLY;
-
- memset(oc, 0, sizeof(*oc));
- oc->mode = S_IFINVALID;
- strbuf_init(&oc->symlink_path, 0);
- ret = get_oid_1(name, namelen, oid, flags);
- if (!ret)
- return ret;
- /*
- * sha1:path --> object name of path in ent sha1
- * :path -> object name of absolute path in index
- * :./path -> object name of path relative to cwd in index
- * :[0-3]:path -> object name of path in index at stage
- * :/foo -> recent commit matching foo
- */
- if (name[0] == ':') {
- int stage = 0;
- const struct cache_entry *ce;
- char *new_path = NULL;
- int pos;
- if (!only_to_die && namelen > 2 && name[1] == '/') {
- struct commit_list *list = NULL;
-
- for_each_ref(handle_one_ref, &list);
- commit_list_sort_by_date(&list);
- return get_oid_oneline(name + 2, oid, list);
- }
- if (namelen < 3 ||
- name[2] != ':' ||
- name[1] < '0' || '3' < name[1])
- cp = name + 1;
- else {
- stage = name[1] - '0';
- cp = name + 3;
- }
- new_path = resolve_relative_path(cp);
- if (!new_path) {
- namelen = namelen - (cp - name);
- } else {
- cp = new_path;
- namelen = strlen(cp);
- }
-
- if (flags & GET_OID_RECORD_PATH)
- oc->path = xstrdup(cp);
-
- if (!active_cache)
- read_cache();
- pos = cache_name_pos(cp, namelen);
- if (pos < 0)
- pos = -pos - 1;
- while (pos < active_nr) {
- ce = active_cache[pos];
- if (ce_namelen(ce) != namelen ||
- memcmp(ce->name, cp, namelen))
- break;
- if (ce_stage(ce) == stage) {
- oidcpy(oid, &ce->oid);
- oc->mode = ce->ce_mode;
- free(new_path);
- return 0;
- }
- pos++;
- }
- if (only_to_die && name[1] && name[1] != '/')
- diagnose_invalid_index_path(stage, prefix, cp);
- free(new_path);
- return -1;
- }
- for (cp = name, bracket_depth = 0; *cp; cp++) {
- if (*cp == '{')
- bracket_depth++;
- else if (bracket_depth && *cp == '}')
- bracket_depth--;
- else if (!bracket_depth && *cp == ':')
- break;
- }
- if (*cp == ':') {
- struct object_id tree_oid;
- int len = cp - name;
- unsigned sub_flags = flags;
-
- sub_flags &= ~GET_OID_DISAMBIGUATORS;
- sub_flags |= GET_OID_TREEISH;
-
- if (!get_oid_1(name, len, &tree_oid, sub_flags)) {
- const char *filename = cp+1;
- char *new_filename = NULL;
-
- new_filename = resolve_relative_path(filename);
- if (new_filename)
- filename = new_filename;
- if (flags & GET_OID_FOLLOW_SYMLINKS) {
- ret = get_tree_entry_follow_symlinks(tree_oid.hash,
- filename, oid->hash, &oc->symlink_path,
- &oc->mode);
- } else {
- ret = get_tree_entry(&tree_oid, filename, oid,
- &oc->mode);
- if (ret && only_to_die) {
- diagnose_invalid_oid_path(prefix,
- filename,
- &tree_oid,
- name, len);
- }
- }
- hashcpy(oc->tree, tree_oid.hash);
- if (flags & GET_OID_RECORD_PATH)
- oc->path = xstrdup(filename);
-
- free(new_filename);
- return ret;
- } else {
- if (only_to_die)
- die("Invalid object name '%.*s'.", len, name);
- }
- }
- return ret;
-}
-
-/*
- * Call this function when you know "name" given by the end user must
- * name an object but it doesn't; the function _may_ die with a better
- * diagnostic message than "no such object 'name'", e.g. "Path 'doc' does not
- * exist in 'HEAD'" when given "HEAD:doc", or it may return in which case
- * you have a chance to diagnose the error further.
- */
-void maybe_die_on_misspelt_object_name(const char *name, const char *prefix)
-{
- struct object_context oc;
- struct object_id oid;
- get_oid_with_context_1(name, GET_OID_ONLY_TO_DIE, prefix, &oid, &oc);
-}
-
-int get_oid_with_context(const char *str, unsigned flags, struct object_id *oid, struct object_context *oc)
-{
- if (flags & GET_OID_FOLLOW_SYMLINKS && flags & GET_OID_ONLY_TO_DIE)
- die("BUG: incompatible flags for get_sha1_with_context");
- return get_oid_with_context_1(str, flags, NULL, oid, oc);
-}
#include "cache.h"
#include "quote.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
#include "strbuf.h"
#include "run-command.h"
--- /dev/null
+static const struct interval zero_width[] = {
+{ 0x0300, 0x036F },
+{ 0x0483, 0x0489 },
+{ 0x0591, 0x05BD },
+{ 0x05BF, 0x05BF },
+{ 0x05C1, 0x05C2 },
+{ 0x05C4, 0x05C5 },
+{ 0x05C7, 0x05C7 },
+{ 0x0600, 0x0605 },
+{ 0x0610, 0x061A },
+{ 0x061C, 0x061C },
+{ 0x064B, 0x065F },
+{ 0x0670, 0x0670 },
+{ 0x06D6, 0x06DD },
+{ 0x06DF, 0x06E4 },
+{ 0x06E7, 0x06E8 },
+{ 0x06EA, 0x06ED },
+{ 0x070F, 0x070F },
+{ 0x0711, 0x0711 },
+{ 0x0730, 0x074A },
+{ 0x07A6, 0x07B0 },
+{ 0x07EB, 0x07F3 },
+{ 0x0816, 0x0819 },
+{ 0x081B, 0x0823 },
+{ 0x0825, 0x0827 },
+{ 0x0829, 0x082D },
+{ 0x0859, 0x085B },
+{ 0x08D4, 0x0902 },
+{ 0x093A, 0x093A },
+{ 0x093C, 0x093C },
+{ 0x0941, 0x0948 },
+{ 0x094D, 0x094D },
+{ 0x0951, 0x0957 },
+{ 0x0962, 0x0963 },
+{ 0x0981, 0x0981 },
+{ 0x09BC, 0x09BC },
+{ 0x09C1, 0x09C4 },
+{ 0x09CD, 0x09CD },
+{ 0x09E2, 0x09E3 },
+{ 0x0A01, 0x0A02 },
+{ 0x0A3C, 0x0A3C },
+{ 0x0A41, 0x0A42 },
+{ 0x0A47, 0x0A48 },
+{ 0x0A4B, 0x0A4D },
+{ 0x0A51, 0x0A51 },
+{ 0x0A70, 0x0A71 },
+{ 0x0A75, 0x0A75 },
+{ 0x0A81, 0x0A82 },
+{ 0x0ABC, 0x0ABC },
+{ 0x0AC1, 0x0AC5 },
+{ 0x0AC7, 0x0AC8 },
+{ 0x0ACD, 0x0ACD },
+{ 0x0AE2, 0x0AE3 },
+{ 0x0AFA, 0x0AFF },
+{ 0x0B01, 0x0B01 },
+{ 0x0B3C, 0x0B3C },
+{ 0x0B3F, 0x0B3F },
+{ 0x0B41, 0x0B44 },
+{ 0x0B4D, 0x0B4D },
+{ 0x0B56, 0x0B56 },
+{ 0x0B62, 0x0B63 },
+{ 0x0B82, 0x0B82 },
+{ 0x0BC0, 0x0BC0 },
+{ 0x0BCD, 0x0BCD },
+{ 0x0C00, 0x0C00 },
+{ 0x0C3E, 0x0C40 },
+{ 0x0C46, 0x0C48 },
+{ 0x0C4A, 0x0C4D },
+{ 0x0C55, 0x0C56 },
+{ 0x0C62, 0x0C63 },
+{ 0x0C81, 0x0C81 },
+{ 0x0CBC, 0x0CBC },
+{ 0x0CBF, 0x0CBF },
+{ 0x0CC6, 0x0CC6 },
+{ 0x0CCC, 0x0CCD },
+{ 0x0CE2, 0x0CE3 },
+{ 0x0D00, 0x0D01 },
+{ 0x0D3B, 0x0D3C },
+{ 0x0D41, 0x0D44 },
+{ 0x0D4D, 0x0D4D },
+{ 0x0D62, 0x0D63 },
+{ 0x0DCA, 0x0DCA },
+{ 0x0DD2, 0x0DD4 },
+{ 0x0DD6, 0x0DD6 },
+{ 0x0E31, 0x0E31 },
+{ 0x0E34, 0x0E3A },
+{ 0x0E47, 0x0E4E },
+{ 0x0EB1, 0x0EB1 },
+{ 0x0EB4, 0x0EB9 },
+{ 0x0EBB, 0x0EBC },
+{ 0x0EC8, 0x0ECD },
+{ 0x0F18, 0x0F19 },
+{ 0x0F35, 0x0F35 },
+{ 0x0F37, 0x0F37 },
+{ 0x0F39, 0x0F39 },
+{ 0x0F71, 0x0F7E },
+{ 0x0F80, 0x0F84 },
+{ 0x0F86, 0x0F87 },
+{ 0x0F8D, 0x0F97 },
+{ 0x0F99, 0x0FBC },
+{ 0x0FC6, 0x0FC6 },
+{ 0x102D, 0x1030 },
+{ 0x1032, 0x1037 },
+{ 0x1039, 0x103A },
+{ 0x103D, 0x103E },
+{ 0x1058, 0x1059 },
+{ 0x105E, 0x1060 },
+{ 0x1071, 0x1074 },
+{ 0x1082, 0x1082 },
+{ 0x1085, 0x1086 },
+{ 0x108D, 0x108D },
+{ 0x109D, 0x109D },
+{ 0x1160, 0x11FF },
+{ 0x135D, 0x135F },
+{ 0x1712, 0x1714 },
+{ 0x1732, 0x1734 },
+{ 0x1752, 0x1753 },
+{ 0x1772, 0x1773 },
+{ 0x17B4, 0x17B5 },
+{ 0x17B7, 0x17BD },
+{ 0x17C6, 0x17C6 },
+{ 0x17C9, 0x17D3 },
+{ 0x17DD, 0x17DD },
+{ 0x180B, 0x180E },
+{ 0x1885, 0x1886 },
+{ 0x18A9, 0x18A9 },
+{ 0x1920, 0x1922 },
+{ 0x1927, 0x1928 },
+{ 0x1932, 0x1932 },
+{ 0x1939, 0x193B },
+{ 0x1A17, 0x1A18 },
+{ 0x1A1B, 0x1A1B },
+{ 0x1A56, 0x1A56 },
+{ 0x1A58, 0x1A5E },
+{ 0x1A60, 0x1A60 },
+{ 0x1A62, 0x1A62 },
+{ 0x1A65, 0x1A6C },
+{ 0x1A73, 0x1A7C },
+{ 0x1A7F, 0x1A7F },
+{ 0x1AB0, 0x1ABE },
+{ 0x1B00, 0x1B03 },
+{ 0x1B34, 0x1B34 },
+{ 0x1B36, 0x1B3A },
+{ 0x1B3C, 0x1B3C },
+{ 0x1B42, 0x1B42 },
+{ 0x1B6B, 0x1B73 },
+{ 0x1B80, 0x1B81 },
+{ 0x1BA2, 0x1BA5 },
+{ 0x1BA8, 0x1BA9 },
+{ 0x1BAB, 0x1BAD },
+{ 0x1BE6, 0x1BE6 },
+{ 0x1BE8, 0x1BE9 },
+{ 0x1BED, 0x1BED },
+{ 0x1BEF, 0x1BF1 },
+{ 0x1C2C, 0x1C33 },
+{ 0x1C36, 0x1C37 },
+{ 0x1CD0, 0x1CD2 },
+{ 0x1CD4, 0x1CE0 },
+{ 0x1CE2, 0x1CE8 },
+{ 0x1CED, 0x1CED },
+{ 0x1CF4, 0x1CF4 },
+{ 0x1CF8, 0x1CF9 },
+{ 0x1DC0, 0x1DF9 },
+{ 0x1DFB, 0x1DFF },
+{ 0x200B, 0x200F },
+{ 0x202A, 0x202E },
+{ 0x2060, 0x2064 },
+{ 0x2066, 0x206F },
+{ 0x20D0, 0x20F0 },
+{ 0x2CEF, 0x2CF1 },
+{ 0x2D7F, 0x2D7F },
+{ 0x2DE0, 0x2DFF },
+{ 0x302A, 0x302D },
+{ 0x3099, 0x309A },
+{ 0xA66F, 0xA672 },
+{ 0xA674, 0xA67D },
+{ 0xA69E, 0xA69F },
+{ 0xA6F0, 0xA6F1 },
+{ 0xA802, 0xA802 },
+{ 0xA806, 0xA806 },
+{ 0xA80B, 0xA80B },
+{ 0xA825, 0xA826 },
+{ 0xA8C4, 0xA8C5 },
+{ 0xA8E0, 0xA8F1 },
+{ 0xA926, 0xA92D },
+{ 0xA947, 0xA951 },
+{ 0xA980, 0xA982 },
+{ 0xA9B3, 0xA9B3 },
+{ 0xA9B6, 0xA9B9 },
+{ 0xA9BC, 0xA9BC },
+{ 0xA9E5, 0xA9E5 },
+{ 0xAA29, 0xAA2E },
+{ 0xAA31, 0xAA32 },
+{ 0xAA35, 0xAA36 },
+{ 0xAA43, 0xAA43 },
+{ 0xAA4C, 0xAA4C },
+{ 0xAA7C, 0xAA7C },
+{ 0xAAB0, 0xAAB0 },
+{ 0xAAB2, 0xAAB4 },
+{ 0xAAB7, 0xAAB8 },
+{ 0xAABE, 0xAABF },
+{ 0xAAC1, 0xAAC1 },
+{ 0xAAEC, 0xAAED },
+{ 0xAAF6, 0xAAF6 },
+{ 0xABE5, 0xABE5 },
+{ 0xABE8, 0xABE8 },
+{ 0xABED, 0xABED },
+{ 0xFB1E, 0xFB1E },
+{ 0xFE00, 0xFE0F },
+{ 0xFE20, 0xFE2F },
+{ 0xFEFF, 0xFEFF },
+{ 0xFFF9, 0xFFFB },
+{ 0x101FD, 0x101FD },
+{ 0x102E0, 0x102E0 },
+{ 0x10376, 0x1037A },
+{ 0x10A01, 0x10A03 },
+{ 0x10A05, 0x10A06 },
+{ 0x10A0C, 0x10A0F },
+{ 0x10A38, 0x10A3A },
+{ 0x10A3F, 0x10A3F },
+{ 0x10AE5, 0x10AE6 },
+{ 0x11001, 0x11001 },
+{ 0x11038, 0x11046 },
+{ 0x1107F, 0x11081 },
+{ 0x110B3, 0x110B6 },
+{ 0x110B9, 0x110BA },
+{ 0x110BD, 0x110BD },
+{ 0x11100, 0x11102 },
+{ 0x11127, 0x1112B },
+{ 0x1112D, 0x11134 },
+{ 0x11173, 0x11173 },
+{ 0x11180, 0x11181 },
+{ 0x111B6, 0x111BE },
+{ 0x111CA, 0x111CC },
+{ 0x1122F, 0x11231 },
+{ 0x11234, 0x11234 },
+{ 0x11236, 0x11237 },
+{ 0x1123E, 0x1123E },
+{ 0x112DF, 0x112DF },
+{ 0x112E3, 0x112EA },
+{ 0x11300, 0x11301 },
+{ 0x1133C, 0x1133C },
+{ 0x11340, 0x11340 },
+{ 0x11366, 0x1136C },
+{ 0x11370, 0x11374 },
+{ 0x11438, 0x1143F },
+{ 0x11442, 0x11444 },
+{ 0x11446, 0x11446 },
+{ 0x114B3, 0x114B8 },
+{ 0x114BA, 0x114BA },
+{ 0x114BF, 0x114C0 },
+{ 0x114C2, 0x114C3 },
+{ 0x115B2, 0x115B5 },
+{ 0x115BC, 0x115BD },
+{ 0x115BF, 0x115C0 },
+{ 0x115DC, 0x115DD },
+{ 0x11633, 0x1163A },
+{ 0x1163D, 0x1163D },
+{ 0x1163F, 0x11640 },
+{ 0x116AB, 0x116AB },
+{ 0x116AD, 0x116AD },
+{ 0x116B0, 0x116B5 },
+{ 0x116B7, 0x116B7 },
+{ 0x1171D, 0x1171F },
+{ 0x11722, 0x11725 },
+{ 0x11727, 0x1172B },
+{ 0x11A01, 0x11A06 },
+{ 0x11A09, 0x11A0A },
+{ 0x11A33, 0x11A38 },
+{ 0x11A3B, 0x11A3E },
+{ 0x11A47, 0x11A47 },
+{ 0x11A51, 0x11A56 },
+{ 0x11A59, 0x11A5B },
+{ 0x11A8A, 0x11A96 },
+{ 0x11A98, 0x11A99 },
+{ 0x11C30, 0x11C36 },
+{ 0x11C38, 0x11C3D },
+{ 0x11C3F, 0x11C3F },
+{ 0x11C92, 0x11CA7 },
+{ 0x11CAA, 0x11CB0 },
+{ 0x11CB2, 0x11CB3 },
+{ 0x11CB5, 0x11CB6 },
+{ 0x11D31, 0x11D36 },
+{ 0x11D3A, 0x11D3A },
+{ 0x11D3C, 0x11D3D },
+{ 0x11D3F, 0x11D45 },
+{ 0x11D47, 0x11D47 },
+{ 0x16AF0, 0x16AF4 },
+{ 0x16B30, 0x16B36 },
+{ 0x16F8F, 0x16F92 },
+{ 0x1BC9D, 0x1BC9E },
+{ 0x1BCA0, 0x1BCA3 },
+{ 0x1D167, 0x1D169 },
+{ 0x1D173, 0x1D182 },
+{ 0x1D185, 0x1D18B },
+{ 0x1D1AA, 0x1D1AD },
+{ 0x1D242, 0x1D244 },
+{ 0x1DA00, 0x1DA36 },
+{ 0x1DA3B, 0x1DA6C },
+{ 0x1DA75, 0x1DA75 },
+{ 0x1DA84, 0x1DA84 },
+{ 0x1DA9B, 0x1DA9F },
+{ 0x1DAA1, 0x1DAAF },
+{ 0x1E000, 0x1E006 },
+{ 0x1E008, 0x1E018 },
+{ 0x1E01B, 0x1E021 },
+{ 0x1E023, 0x1E024 },
+{ 0x1E026, 0x1E02A },
+{ 0x1E8D0, 0x1E8D6 },
+{ 0x1E944, 0x1E94A },
+{ 0xE0001, 0xE0001 },
+{ 0xE0020, 0xE007F },
+{ 0xE0100, 0xE01EF }
+};
+static const struct interval double_width[] = {
+{ 0x1100, 0x115F },
+{ 0x231A, 0x231B },
+{ 0x2329, 0x232A },
+{ 0x23E9, 0x23EC },
+{ 0x23F0, 0x23F0 },
+{ 0x23F3, 0x23F3 },
+{ 0x25FD, 0x25FE },
+{ 0x2614, 0x2615 },
+{ 0x2648, 0x2653 },
+{ 0x267F, 0x267F },
+{ 0x2693, 0x2693 },
+{ 0x26A1, 0x26A1 },
+{ 0x26AA, 0x26AB },
+{ 0x26BD, 0x26BE },
+{ 0x26C4, 0x26C5 },
+{ 0x26CE, 0x26CE },
+{ 0x26D4, 0x26D4 },
+{ 0x26EA, 0x26EA },
+{ 0x26F2, 0x26F3 },
+{ 0x26F5, 0x26F5 },
+{ 0x26FA, 0x26FA },
+{ 0x26FD, 0x26FD },
+{ 0x2705, 0x2705 },
+{ 0x270A, 0x270B },
+{ 0x2728, 0x2728 },
+{ 0x274C, 0x274C },
+{ 0x274E, 0x274E },
+{ 0x2753, 0x2755 },
+{ 0x2757, 0x2757 },
+{ 0x2795, 0x2797 },
+{ 0x27B0, 0x27B0 },
+{ 0x27BF, 0x27BF },
+{ 0x2B1B, 0x2B1C },
+{ 0x2B50, 0x2B50 },
+{ 0x2B55, 0x2B55 },
+{ 0x2E80, 0x2E99 },
+{ 0x2E9B, 0x2EF3 },
+{ 0x2F00, 0x2FD5 },
+{ 0x2FF0, 0x2FFB },
+{ 0x3000, 0x303E },
+{ 0x3041, 0x3096 },
+{ 0x3099, 0x30FF },
+{ 0x3105, 0x312E },
+{ 0x3131, 0x318E },
+{ 0x3190, 0x31BA },
+{ 0x31C0, 0x31E3 },
+{ 0x31F0, 0x321E },
+{ 0x3220, 0x3247 },
+{ 0x3250, 0x32FE },
+{ 0x3300, 0x4DBF },
+{ 0x4E00, 0xA48C },
+{ 0xA490, 0xA4C6 },
+{ 0xA960, 0xA97C },
+{ 0xAC00, 0xD7A3 },
+{ 0xF900, 0xFAFF },
+{ 0xFE10, 0xFE19 },
+{ 0xFE30, 0xFE52 },
+{ 0xFE54, 0xFE66 },
+{ 0xFE68, 0xFE6B },
+{ 0xFF01, 0xFF60 },
+{ 0xFFE0, 0xFFE6 },
+{ 0x16FE0, 0x16FE1 },
+{ 0x17000, 0x187EC },
+{ 0x18800, 0x18AF2 },
+{ 0x1B000, 0x1B11E },
+{ 0x1B170, 0x1B2FB },
+{ 0x1F004, 0x1F004 },
+{ 0x1F0CF, 0x1F0CF },
+{ 0x1F18E, 0x1F18E },
+{ 0x1F191, 0x1F19A },
+{ 0x1F200, 0x1F202 },
+{ 0x1F210, 0x1F23B },
+{ 0x1F240, 0x1F248 },
+{ 0x1F250, 0x1F251 },
+{ 0x1F260, 0x1F265 },
+{ 0x1F300, 0x1F320 },
+{ 0x1F32D, 0x1F335 },
+{ 0x1F337, 0x1F37C },
+{ 0x1F37E, 0x1F393 },
+{ 0x1F3A0, 0x1F3CA },
+{ 0x1F3CF, 0x1F3D3 },
+{ 0x1F3E0, 0x1F3F0 },
+{ 0x1F3F4, 0x1F3F4 },
+{ 0x1F3F8, 0x1F43E },
+{ 0x1F440, 0x1F440 },
+{ 0x1F442, 0x1F4FC },
+{ 0x1F4FF, 0x1F53D },
+{ 0x1F54B, 0x1F54E },
+{ 0x1F550, 0x1F567 },
+{ 0x1F57A, 0x1F57A },
+{ 0x1F595, 0x1F596 },
+{ 0x1F5A4, 0x1F5A4 },
+{ 0x1F5FB, 0x1F64F },
+{ 0x1F680, 0x1F6C5 },
+{ 0x1F6CC, 0x1F6CC },
+{ 0x1F6D0, 0x1F6D2 },
+{ 0x1F6EB, 0x1F6EC },
+{ 0x1F6F4, 0x1F6F8 },
+{ 0x1F910, 0x1F93E },
+{ 0x1F940, 0x1F94C },
+{ 0x1F950, 0x1F96B },
+{ 0x1F980, 0x1F997 },
+{ 0x1F9C0, 0x1F9C0 },
+{ 0x1F9D0, 0x1F9E6 },
+{ 0x20000, 0x2FFFD },
+{ 0x30000, 0x3FFFD }
+};
+++ /dev/null
-static const struct interval zero_width[] = {
-{ 0x0300, 0x036F },
-{ 0x0483, 0x0489 },
-{ 0x0591, 0x05BD },
-{ 0x05BF, 0x05BF },
-{ 0x05C1, 0x05C2 },
-{ 0x05C4, 0x05C5 },
-{ 0x05C7, 0x05C7 },
-{ 0x0600, 0x0605 },
-{ 0x0610, 0x061A },
-{ 0x061C, 0x061C },
-{ 0x064B, 0x065F },
-{ 0x0670, 0x0670 },
-{ 0x06D6, 0x06DD },
-{ 0x06DF, 0x06E4 },
-{ 0x06E7, 0x06E8 },
-{ 0x06EA, 0x06ED },
-{ 0x070F, 0x070F },
-{ 0x0711, 0x0711 },
-{ 0x0730, 0x074A },
-{ 0x07A6, 0x07B0 },
-{ 0x07EB, 0x07F3 },
-{ 0x0816, 0x0819 },
-{ 0x081B, 0x0823 },
-{ 0x0825, 0x0827 },
-{ 0x0829, 0x082D },
-{ 0x0859, 0x085B },
-{ 0x08D4, 0x0902 },
-{ 0x093A, 0x093A },
-{ 0x093C, 0x093C },
-{ 0x0941, 0x0948 },
-{ 0x094D, 0x094D },
-{ 0x0951, 0x0957 },
-{ 0x0962, 0x0963 },
-{ 0x0981, 0x0981 },
-{ 0x09BC, 0x09BC },
-{ 0x09C1, 0x09C4 },
-{ 0x09CD, 0x09CD },
-{ 0x09E2, 0x09E3 },
-{ 0x0A01, 0x0A02 },
-{ 0x0A3C, 0x0A3C },
-{ 0x0A41, 0x0A42 },
-{ 0x0A47, 0x0A48 },
-{ 0x0A4B, 0x0A4D },
-{ 0x0A51, 0x0A51 },
-{ 0x0A70, 0x0A71 },
-{ 0x0A75, 0x0A75 },
-{ 0x0A81, 0x0A82 },
-{ 0x0ABC, 0x0ABC },
-{ 0x0AC1, 0x0AC5 },
-{ 0x0AC7, 0x0AC8 },
-{ 0x0ACD, 0x0ACD },
-{ 0x0AE2, 0x0AE3 },
-{ 0x0AFA, 0x0AFF },
-{ 0x0B01, 0x0B01 },
-{ 0x0B3C, 0x0B3C },
-{ 0x0B3F, 0x0B3F },
-{ 0x0B41, 0x0B44 },
-{ 0x0B4D, 0x0B4D },
-{ 0x0B56, 0x0B56 },
-{ 0x0B62, 0x0B63 },
-{ 0x0B82, 0x0B82 },
-{ 0x0BC0, 0x0BC0 },
-{ 0x0BCD, 0x0BCD },
-{ 0x0C00, 0x0C00 },
-{ 0x0C3E, 0x0C40 },
-{ 0x0C46, 0x0C48 },
-{ 0x0C4A, 0x0C4D },
-{ 0x0C55, 0x0C56 },
-{ 0x0C62, 0x0C63 },
-{ 0x0C81, 0x0C81 },
-{ 0x0CBC, 0x0CBC },
-{ 0x0CBF, 0x0CBF },
-{ 0x0CC6, 0x0CC6 },
-{ 0x0CCC, 0x0CCD },
-{ 0x0CE2, 0x0CE3 },
-{ 0x0D00, 0x0D01 },
-{ 0x0D3B, 0x0D3C },
-{ 0x0D41, 0x0D44 },
-{ 0x0D4D, 0x0D4D },
-{ 0x0D62, 0x0D63 },
-{ 0x0DCA, 0x0DCA },
-{ 0x0DD2, 0x0DD4 },
-{ 0x0DD6, 0x0DD6 },
-{ 0x0E31, 0x0E31 },
-{ 0x0E34, 0x0E3A },
-{ 0x0E47, 0x0E4E },
-{ 0x0EB1, 0x0EB1 },
-{ 0x0EB4, 0x0EB9 },
-{ 0x0EBB, 0x0EBC },
-{ 0x0EC8, 0x0ECD },
-{ 0x0F18, 0x0F19 },
-{ 0x0F35, 0x0F35 },
-{ 0x0F37, 0x0F37 },
-{ 0x0F39, 0x0F39 },
-{ 0x0F71, 0x0F7E },
-{ 0x0F80, 0x0F84 },
-{ 0x0F86, 0x0F87 },
-{ 0x0F8D, 0x0F97 },
-{ 0x0F99, 0x0FBC },
-{ 0x0FC6, 0x0FC6 },
-{ 0x102D, 0x1030 },
-{ 0x1032, 0x1037 },
-{ 0x1039, 0x103A },
-{ 0x103D, 0x103E },
-{ 0x1058, 0x1059 },
-{ 0x105E, 0x1060 },
-{ 0x1071, 0x1074 },
-{ 0x1082, 0x1082 },
-{ 0x1085, 0x1086 },
-{ 0x108D, 0x108D },
-{ 0x109D, 0x109D },
-{ 0x1160, 0x11FF },
-{ 0x135D, 0x135F },
-{ 0x1712, 0x1714 },
-{ 0x1732, 0x1734 },
-{ 0x1752, 0x1753 },
-{ 0x1772, 0x1773 },
-{ 0x17B4, 0x17B5 },
-{ 0x17B7, 0x17BD },
-{ 0x17C6, 0x17C6 },
-{ 0x17C9, 0x17D3 },
-{ 0x17DD, 0x17DD },
-{ 0x180B, 0x180E },
-{ 0x1885, 0x1886 },
-{ 0x18A9, 0x18A9 },
-{ 0x1920, 0x1922 },
-{ 0x1927, 0x1928 },
-{ 0x1932, 0x1932 },
-{ 0x1939, 0x193B },
-{ 0x1A17, 0x1A18 },
-{ 0x1A1B, 0x1A1B },
-{ 0x1A56, 0x1A56 },
-{ 0x1A58, 0x1A5E },
-{ 0x1A60, 0x1A60 },
-{ 0x1A62, 0x1A62 },
-{ 0x1A65, 0x1A6C },
-{ 0x1A73, 0x1A7C },
-{ 0x1A7F, 0x1A7F },
-{ 0x1AB0, 0x1ABE },
-{ 0x1B00, 0x1B03 },
-{ 0x1B34, 0x1B34 },
-{ 0x1B36, 0x1B3A },
-{ 0x1B3C, 0x1B3C },
-{ 0x1B42, 0x1B42 },
-{ 0x1B6B, 0x1B73 },
-{ 0x1B80, 0x1B81 },
-{ 0x1BA2, 0x1BA5 },
-{ 0x1BA8, 0x1BA9 },
-{ 0x1BAB, 0x1BAD },
-{ 0x1BE6, 0x1BE6 },
-{ 0x1BE8, 0x1BE9 },
-{ 0x1BED, 0x1BED },
-{ 0x1BEF, 0x1BF1 },
-{ 0x1C2C, 0x1C33 },
-{ 0x1C36, 0x1C37 },
-{ 0x1CD0, 0x1CD2 },
-{ 0x1CD4, 0x1CE0 },
-{ 0x1CE2, 0x1CE8 },
-{ 0x1CED, 0x1CED },
-{ 0x1CF4, 0x1CF4 },
-{ 0x1CF8, 0x1CF9 },
-{ 0x1DC0, 0x1DF9 },
-{ 0x1DFB, 0x1DFF },
-{ 0x200B, 0x200F },
-{ 0x202A, 0x202E },
-{ 0x2060, 0x2064 },
-{ 0x2066, 0x206F },
-{ 0x20D0, 0x20F0 },
-{ 0x2CEF, 0x2CF1 },
-{ 0x2D7F, 0x2D7F },
-{ 0x2DE0, 0x2DFF },
-{ 0x302A, 0x302D },
-{ 0x3099, 0x309A },
-{ 0xA66F, 0xA672 },
-{ 0xA674, 0xA67D },
-{ 0xA69E, 0xA69F },
-{ 0xA6F0, 0xA6F1 },
-{ 0xA802, 0xA802 },
-{ 0xA806, 0xA806 },
-{ 0xA80B, 0xA80B },
-{ 0xA825, 0xA826 },
-{ 0xA8C4, 0xA8C5 },
-{ 0xA8E0, 0xA8F1 },
-{ 0xA926, 0xA92D },
-{ 0xA947, 0xA951 },
-{ 0xA980, 0xA982 },
-{ 0xA9B3, 0xA9B3 },
-{ 0xA9B6, 0xA9B9 },
-{ 0xA9BC, 0xA9BC },
-{ 0xA9E5, 0xA9E5 },
-{ 0xAA29, 0xAA2E },
-{ 0xAA31, 0xAA32 },
-{ 0xAA35, 0xAA36 },
-{ 0xAA43, 0xAA43 },
-{ 0xAA4C, 0xAA4C },
-{ 0xAA7C, 0xAA7C },
-{ 0xAAB0, 0xAAB0 },
-{ 0xAAB2, 0xAAB4 },
-{ 0xAAB7, 0xAAB8 },
-{ 0xAABE, 0xAABF },
-{ 0xAAC1, 0xAAC1 },
-{ 0xAAEC, 0xAAED },
-{ 0xAAF6, 0xAAF6 },
-{ 0xABE5, 0xABE5 },
-{ 0xABE8, 0xABE8 },
-{ 0xABED, 0xABED },
-{ 0xFB1E, 0xFB1E },
-{ 0xFE00, 0xFE0F },
-{ 0xFE20, 0xFE2F },
-{ 0xFEFF, 0xFEFF },
-{ 0xFFF9, 0xFFFB },
-{ 0x101FD, 0x101FD },
-{ 0x102E0, 0x102E0 },
-{ 0x10376, 0x1037A },
-{ 0x10A01, 0x10A03 },
-{ 0x10A05, 0x10A06 },
-{ 0x10A0C, 0x10A0F },
-{ 0x10A38, 0x10A3A },
-{ 0x10A3F, 0x10A3F },
-{ 0x10AE5, 0x10AE6 },
-{ 0x11001, 0x11001 },
-{ 0x11038, 0x11046 },
-{ 0x1107F, 0x11081 },
-{ 0x110B3, 0x110B6 },
-{ 0x110B9, 0x110BA },
-{ 0x110BD, 0x110BD },
-{ 0x11100, 0x11102 },
-{ 0x11127, 0x1112B },
-{ 0x1112D, 0x11134 },
-{ 0x11173, 0x11173 },
-{ 0x11180, 0x11181 },
-{ 0x111B6, 0x111BE },
-{ 0x111CA, 0x111CC },
-{ 0x1122F, 0x11231 },
-{ 0x11234, 0x11234 },
-{ 0x11236, 0x11237 },
-{ 0x1123E, 0x1123E },
-{ 0x112DF, 0x112DF },
-{ 0x112E3, 0x112EA },
-{ 0x11300, 0x11301 },
-{ 0x1133C, 0x1133C },
-{ 0x11340, 0x11340 },
-{ 0x11366, 0x1136C },
-{ 0x11370, 0x11374 },
-{ 0x11438, 0x1143F },
-{ 0x11442, 0x11444 },
-{ 0x11446, 0x11446 },
-{ 0x114B3, 0x114B8 },
-{ 0x114BA, 0x114BA },
-{ 0x114BF, 0x114C0 },
-{ 0x114C2, 0x114C3 },
-{ 0x115B2, 0x115B5 },
-{ 0x115BC, 0x115BD },
-{ 0x115BF, 0x115C0 },
-{ 0x115DC, 0x115DD },
-{ 0x11633, 0x1163A },
-{ 0x1163D, 0x1163D },
-{ 0x1163F, 0x11640 },
-{ 0x116AB, 0x116AB },
-{ 0x116AD, 0x116AD },
-{ 0x116B0, 0x116B5 },
-{ 0x116B7, 0x116B7 },
-{ 0x1171D, 0x1171F },
-{ 0x11722, 0x11725 },
-{ 0x11727, 0x1172B },
-{ 0x11A01, 0x11A06 },
-{ 0x11A09, 0x11A0A },
-{ 0x11A33, 0x11A38 },
-{ 0x11A3B, 0x11A3E },
-{ 0x11A47, 0x11A47 },
-{ 0x11A51, 0x11A56 },
-{ 0x11A59, 0x11A5B },
-{ 0x11A8A, 0x11A96 },
-{ 0x11A98, 0x11A99 },
-{ 0x11C30, 0x11C36 },
-{ 0x11C38, 0x11C3D },
-{ 0x11C3F, 0x11C3F },
-{ 0x11C92, 0x11CA7 },
-{ 0x11CAA, 0x11CB0 },
-{ 0x11CB2, 0x11CB3 },
-{ 0x11CB5, 0x11CB6 },
-{ 0x11D31, 0x11D36 },
-{ 0x11D3A, 0x11D3A },
-{ 0x11D3C, 0x11D3D },
-{ 0x11D3F, 0x11D45 },
-{ 0x11D47, 0x11D47 },
-{ 0x16AF0, 0x16AF4 },
-{ 0x16B30, 0x16B36 },
-{ 0x16F8F, 0x16F92 },
-{ 0x1BC9D, 0x1BC9E },
-{ 0x1BCA0, 0x1BCA3 },
-{ 0x1D167, 0x1D169 },
-{ 0x1D173, 0x1D182 },
-{ 0x1D185, 0x1D18B },
-{ 0x1D1AA, 0x1D1AD },
-{ 0x1D242, 0x1D244 },
-{ 0x1DA00, 0x1DA36 },
-{ 0x1DA3B, 0x1DA6C },
-{ 0x1DA75, 0x1DA75 },
-{ 0x1DA84, 0x1DA84 },
-{ 0x1DA9B, 0x1DA9F },
-{ 0x1DAA1, 0x1DAAF },
-{ 0x1E000, 0x1E006 },
-{ 0x1E008, 0x1E018 },
-{ 0x1E01B, 0x1E021 },
-{ 0x1E023, 0x1E024 },
-{ 0x1E026, 0x1E02A },
-{ 0x1E8D0, 0x1E8D6 },
-{ 0x1E944, 0x1E94A },
-{ 0xE0001, 0xE0001 },
-{ 0xE0020, 0xE007F },
-{ 0xE0100, 0xE01EF }
-};
-static const struct interval double_width[] = {
-{ 0x1100, 0x115F },
-{ 0x231A, 0x231B },
-{ 0x2329, 0x232A },
-{ 0x23E9, 0x23EC },
-{ 0x23F0, 0x23F0 },
-{ 0x23F3, 0x23F3 },
-{ 0x25FD, 0x25FE },
-{ 0x2614, 0x2615 },
-{ 0x2648, 0x2653 },
-{ 0x267F, 0x267F },
-{ 0x2693, 0x2693 },
-{ 0x26A1, 0x26A1 },
-{ 0x26AA, 0x26AB },
-{ 0x26BD, 0x26BE },
-{ 0x26C4, 0x26C5 },
-{ 0x26CE, 0x26CE },
-{ 0x26D4, 0x26D4 },
-{ 0x26EA, 0x26EA },
-{ 0x26F2, 0x26F3 },
-{ 0x26F5, 0x26F5 },
-{ 0x26FA, 0x26FA },
-{ 0x26FD, 0x26FD },
-{ 0x2705, 0x2705 },
-{ 0x270A, 0x270B },
-{ 0x2728, 0x2728 },
-{ 0x274C, 0x274C },
-{ 0x274E, 0x274E },
-{ 0x2753, 0x2755 },
-{ 0x2757, 0x2757 },
-{ 0x2795, 0x2797 },
-{ 0x27B0, 0x27B0 },
-{ 0x27BF, 0x27BF },
-{ 0x2B1B, 0x2B1C },
-{ 0x2B50, 0x2B50 },
-{ 0x2B55, 0x2B55 },
-{ 0x2E80, 0x2E99 },
-{ 0x2E9B, 0x2EF3 },
-{ 0x2F00, 0x2FD5 },
-{ 0x2FF0, 0x2FFB },
-{ 0x3000, 0x303E },
-{ 0x3041, 0x3096 },
-{ 0x3099, 0x30FF },
-{ 0x3105, 0x312E },
-{ 0x3131, 0x318E },
-{ 0x3190, 0x31BA },
-{ 0x31C0, 0x31E3 },
-{ 0x31F0, 0x321E },
-{ 0x3220, 0x3247 },
-{ 0x3250, 0x32FE },
-{ 0x3300, 0x4DBF },
-{ 0x4E00, 0xA48C },
-{ 0xA490, 0xA4C6 },
-{ 0xA960, 0xA97C },
-{ 0xAC00, 0xD7A3 },
-{ 0xF900, 0xFAFF },
-{ 0xFE10, 0xFE19 },
-{ 0xFE30, 0xFE52 },
-{ 0xFE54, 0xFE66 },
-{ 0xFE68, 0xFE6B },
-{ 0xFF01, 0xFF60 },
-{ 0xFFE0, 0xFFE6 },
-{ 0x16FE0, 0x16FE1 },
-{ 0x17000, 0x187EC },
-{ 0x18800, 0x18AF2 },
-{ 0x1B000, 0x1B11E },
-{ 0x1B170, 0x1B2FB },
-{ 0x1F004, 0x1F004 },
-{ 0x1F0CF, 0x1F0CF },
-{ 0x1F18E, 0x1F18E },
-{ 0x1F191, 0x1F19A },
-{ 0x1F200, 0x1F202 },
-{ 0x1F210, 0x1F23B },
-{ 0x1F240, 0x1F248 },
-{ 0x1F250, 0x1F251 },
-{ 0x1F260, 0x1F265 },
-{ 0x1F300, 0x1F320 },
-{ 0x1F32D, 0x1F335 },
-{ 0x1F337, 0x1F37C },
-{ 0x1F37E, 0x1F393 },
-{ 0x1F3A0, 0x1F3CA },
-{ 0x1F3CF, 0x1F3D3 },
-{ 0x1F3E0, 0x1F3F0 },
-{ 0x1F3F4, 0x1F3F4 },
-{ 0x1F3F8, 0x1F43E },
-{ 0x1F440, 0x1F440 },
-{ 0x1F442, 0x1F4FC },
-{ 0x1F4FF, 0x1F53D },
-{ 0x1F54B, 0x1F54E },
-{ 0x1F550, 0x1F567 },
-{ 0x1F57A, 0x1F57A },
-{ 0x1F595, 0x1F596 },
-{ 0x1F5A4, 0x1F5A4 },
-{ 0x1F5FB, 0x1F64F },
-{ 0x1F680, 0x1F6C5 },
-{ 0x1F6CC, 0x1F6CC },
-{ 0x1F6D0, 0x1F6D2 },
-{ 0x1F6EB, 0x1F6EC },
-{ 0x1F6F4, 0x1F6F8 },
-{ 0x1F910, 0x1F93E },
-{ 0x1F940, 0x1F94C },
-{ 0x1F950, 0x1F96B },
-{ 0x1F980, 0x1F997 },
-{ 0x1F9C0, 0x1F9C0 },
-{ 0x1F9D0, 0x1F9E6 },
-{ 0x20000, 0x2FFFD },
-{ 0x30000, 0x3FFFD }
-};
#include "tag.h"
#include "object.h"
#include "commit.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
#include "diff.h"
#include "revision.h"
#include "list-objects.h"
/*
* Sorted list of non-overlapping intervals of non-spacing characters,
*/
-#include "unicode_width.h"
+#include "unicode-width.h"
/* test for 8-bit control characters */
if (ch == 0)
--- /dev/null
+#include "cache.h"
+#include "run-command.h"
+
+/*
+ * Some cases use stdio, but want to flush after the write
+ * to get error handling (and to get better interactive
+ * behaviour - not buffering excessively).
+ *
+ * Of course, if the flush happened within the write itself,
+ * we've already lost the error code, and cannot report it any
+ * more. So we just ignore that case instead (and hope we get
+ * the right error code on the flush).
+ *
+ * If the file handle is stdout, and stdout is a file, then skip the
+ * flush entirely since it's not needed.
+ */
+void maybe_flush_or_die(FILE *f, const char *desc)
+{
+ static int skip_stdout_flush = -1;
+ struct stat st;
+ char *cp;
+
+ if (f == stdout) {
+ if (skip_stdout_flush < 0) {
+ cp = getenv("GIT_FLUSH");
+ if (cp)
+ skip_stdout_flush = (atoi(cp) == 0);
+ else if ((fstat(fileno(stdout), &st) == 0) &&
+ S_ISREG(st.st_mode))
+ skip_stdout_flush = 1;
+ else
+ skip_stdout_flush = 0;
+ }
+ if (skip_stdout_flush && !ferror(f))
+ return;
+ }
+ if (fflush(f)) {
+ check_pipe(errno);
+ die_errno("write failure on '%s'", desc);
+ }
+}
+
+void fprintf_or_die(FILE *f, const char *fmt, ...)
+{
+ va_list ap;
+ int ret;
+
+ va_start(ap, fmt);
+ ret = vfprintf(f, fmt, ap);
+ va_end(ap);
+
+ if (ret < 0) {
+ check_pipe(errno);
+ die_errno("write error");
+ }
+}
+
+void fsync_or_die(int fd, const char *msg)
+{
+ if (fsync(fd) < 0) {
+ die_errno("fsync error on '%s'", msg);
+ }
+}
+
+void write_or_die(int fd, const void *buf, size_t count)
+{
+ if (write_in_full(fd, buf, count) < 0) {
+ check_pipe(errno);
+ die_errno("write error");
+ }
+}
+++ /dev/null
-#include "cache.h"
-#include "run-command.h"
-
-/*
- * Some cases use stdio, but want to flush after the write
- * to get error handling (and to get better interactive
- * behaviour - not buffering excessively).
- *
- * Of course, if the flush happened within the write itself,
- * we've already lost the error code, and cannot report it any
- * more. So we just ignore that case instead (and hope we get
- * the right error code on the flush).
- *
- * If the file handle is stdout, and stdout is a file, then skip the
- * flush entirely since it's not needed.
- */
-void maybe_flush_or_die(FILE *f, const char *desc)
-{
- static int skip_stdout_flush = -1;
- struct stat st;
- char *cp;
-
- if (f == stdout) {
- if (skip_stdout_flush < 0) {
- cp = getenv("GIT_FLUSH");
- if (cp)
- skip_stdout_flush = (atoi(cp) == 0);
- else if ((fstat(fileno(stdout), &st) == 0) &&
- S_ISREG(st.st_mode))
- skip_stdout_flush = 1;
- else
- skip_stdout_flush = 0;
- }
- if (skip_stdout_flush && !ferror(f))
- return;
- }
- if (fflush(f)) {
- check_pipe(errno);
- die_errno("write failure on '%s'", desc);
- }
-}
-
-void fprintf_or_die(FILE *f, const char *fmt, ...)
-{
- va_list ap;
- int ret;
-
- va_start(ap, fmt);
- ret = vfprintf(f, fmt, ap);
- va_end(ap);
-
- if (ret < 0) {
- check_pipe(errno);
- die_errno("write error");
- }
-}
-
-void fsync_or_die(int fd, const char *msg)
-{
- if (fsync(fd) < 0) {
- die_errno("fsync error on '%s'", msg);
- }
-}
-
-void write_or_die(int fd, const void *buf, size_t count)
-{
- if (write_in_full(fd, buf, count) < 0) {
- check_pipe(errno);
- die_errno("write error");
- }
-}