#include "quote.h"
#include "diff.h"
#include "diffcore.h"
+#include "xdiff/xdiff.h"
-static const char *diff_opts = "-pu";
-static unsigned char null_sha1[20] = { 0, };
-
-static int reverse_diff;
static int use_size_cache;
+int diff_rename_limit_default = -1;
+
+int git_diff_config(const char *var, const char *value)
+{
+ if (!strcmp(var, "diff.renamelimit")) {
+ diff_rename_limit_default = git_config_int(var, value);
+ return 0;
+ }
+
+ return git_default_config(var, value);
+}
+
+static char *quote_one(const char *str)
+{
+ int needlen;
+ char *xp;
+
+ if (!str)
+ return NULL;
+ needlen = quote_c_style(str, NULL, NULL, 0);
+ if (!needlen)
+ return strdup(str);
+ xp = xmalloc(needlen + 1);
+ quote_c_style(str, xp, NULL, 0);
+ return xp;
+}
+
+static char *quote_two(const char *one, const char *two)
+{
+ int need_one = quote_c_style(one, NULL, NULL, 1);
+ int need_two = quote_c_style(two, NULL, NULL, 1);
+ char *xp;
+
+ if (need_one + need_two) {
+ if (!need_one) need_one = strlen(one);
+ if (!need_two) need_one = strlen(two);
+
+ xp = xmalloc(need_one + need_two + 3);
+ xp[0] = '"';
+ quote_c_style(one, xp + 1, NULL, 1);
+ quote_c_style(two, xp + need_one + 1, NULL, 1);
+ strcpy(xp + need_one + need_two + 1, "\"");
+ return xp;
+ }
+ need_one = strlen(one);
+ need_two = strlen(two);
+ xp = xmalloc(need_one + need_two + 1);
+ strcpy(xp, one);
+ strcpy(xp + need_one, two);
+ return xp;
+}
+
static const char *external_diff(void)
{
static const char *external_diff_cmd = NULL;
if (done_preparing)
return external_diff_cmd;
-
- /*
- * Default values above are meant to match the
- * Linux kernel development style. Examples of
- * alternative styles you can specify via environment
- * variables are:
- *
- * GIT_DIFF_OPTS="-c";
- */
- if (gitenv("GIT_EXTERNAL_DIFF"))
- external_diff_cmd = gitenv("GIT_EXTERNAL_DIFF");
-
- /* In case external diff fails... */
- diff_opts = gitenv("GIT_DIFF_OPTS") ? : diff_opts;
-
+ external_diff_cmd = getenv("GIT_EXTERNAL_DIFF");
done_preparing = 1;
return external_diff_cmd;
}
char tmp_path[TEMPFILE_PATH_LEN];
} diff_temp[2];
-static int count_lines(const char *filename)
+static int count_lines(const char *data, int size)
{
- FILE *in;
int count, ch, completely_empty = 1, nl_just_seen = 0;
- in = fopen(filename, "r");
count = 0;
- while ((ch = fgetc(in)) != EOF)
+ while (0 < size--) {
+ ch = *data++;
if (ch == '\n') {
count++;
nl_just_seen = 1;
nl_just_seen = 0;
completely_empty = 0;
}
- fclose(in);
+ }
if (completely_empty)
return 0;
if (!nl_just_seen)
}
}
-static void copy_file(int prefix, const char *filename)
+static void copy_file(int prefix, const char *data, int size)
{
- FILE *in;
int ch, nl_just_seen = 1;
- in = fopen(filename, "r");
- while ((ch = fgetc(in)) != EOF) {
+ while (0 < size--) {
+ ch = *data++;
if (nl_just_seen)
putchar(prefix);
putchar(ch);
else
nl_just_seen = 0;
}
- fclose(in);
if (!nl_just_seen)
printf("\n\\ No newline at end of file\n");
}
static void emit_rewrite_diff(const char *name_a,
const char *name_b,
- struct diff_tempfile *temp)
+ struct diff_filespec *one,
+ struct diff_filespec *two)
{
/* Use temp[i].name as input, name_a and name_b as labels */
int lc_a, lc_b;
- lc_a = count_lines(temp[0].name);
- lc_b = count_lines(temp[1].name);
+ lc_a = count_lines(one->data, one->size);
+ lc_b = count_lines(two->data, two->size);
printf("--- %s\n+++ %s\n@@ -", name_a, name_b);
print_line_count(lc_a);
printf(" +");
print_line_count(lc_b);
printf(" @@\n");
if (lc_a)
- copy_file('-', temp[0].name);
+ copy_file('-', one->data, one->size);
if (lc_b)
- copy_file('+', temp[1].name);
+ copy_file('+', two->data, two->size);
}
-static void builtin_diff(const char *name_a,
- const char *name_b,
- struct diff_tempfile *temp,
- const char *xfrm_msg,
- int complete_rewrite)
+static int fill_mmfile(mmfile_t *mf, struct diff_filespec *one)
{
- int i, next_at, cmd_size;
- const char *const diff_cmd = "diff -L%s%s -L%s%s";
- const char *const diff_arg = "%s %s||:"; /* "||:" is to return 0 */
- const char *input_name_sq[2];
- const char *path0[2];
- const char *path1[2];
- const char *name_sq[2];
- char *cmd;
-
- name_sq[0] = sq_quote(name_a);
- name_sq[1] = sq_quote(name_b);
-
- /* diff_cmd and diff_arg have 6 %s in total which makes
- * the sum of these strings 12 bytes larger than required.
- * we use 2 spaces around diff-opts, and we need to count
- * terminating NUL, so we subtract 9 here.
- */
- cmd_size = (strlen(diff_cmd) + strlen(diff_opts) +
- strlen(diff_arg) - 9);
- for (i = 0; i < 2; i++) {
- input_name_sq[i] = sq_quote(temp[i].name);
- if (!strcmp(temp[i].name, "/dev/null")) {
- path0[i] = "/dev/null";
- path1[i] = "";
- } else {
- path0[i] = i ? "b/" : "a/";
- path1[i] = name_sq[i];
- }
- cmd_size += (strlen(path0[i]) + strlen(path1[i]) +
- strlen(input_name_sq[i]));
+ if (!DIFF_FILE_VALID(one)) {
+ mf->ptr = ""; /* does not matter */
+ mf->size = 0;
+ return 0;
}
+ else if (diff_populate_filespec(one, 0))
+ return -1;
+ mf->ptr = one->data;
+ mf->size = one->size;
+ return 0;
+}
- cmd = xmalloc(cmd_size);
+struct emit_callback {
+ const char **label_path;
+};
- next_at = 0;
- next_at += snprintf(cmd+next_at, cmd_size-next_at,
- diff_cmd,
- path0[0], path1[0], path0[1], path1[1]);
- next_at += snprintf(cmd+next_at, cmd_size-next_at,
- " %s ", diff_opts);
- next_at += snprintf(cmd+next_at, cmd_size-next_at,
- diff_arg, input_name_sq[0], input_name_sq[1]);
+static int fn_out(void *priv, mmbuffer_t *mb, int nbuf)
+{
+ int i;
+ struct emit_callback *ecbdata = priv;
- printf("diff --git a/%s b/%s\n", name_a, name_b);
- if (!path1[0][0]) {
- printf("new file mode %s\n", temp[1].mode);
+ if (ecbdata->label_path[0]) {
+ printf("--- %s\n", ecbdata->label_path[0]);
+ printf("+++ %s\n", ecbdata->label_path[1]);
+ ecbdata->label_path[0] = ecbdata->label_path[1] = NULL;
+ }
+ for (i = 0; i < nbuf; i++)
+ if (!fwrite(mb[i].ptr, mb[i].size, 1, stdout))
+ return -1;
+ return 0;
+}
+
+#define FIRST_FEW_BYTES 8000
+static int mmfile_is_binary(mmfile_t *mf)
+{
+ long sz = mf->size;
+ if (FIRST_FEW_BYTES < sz)
+ sz = FIRST_FEW_BYTES;
+ if (memchr(mf->ptr, 0, sz))
+ return 1;
+ return 0;
+}
+
+static void builtin_diff(const char *name_a,
+ const char *name_b,
+ struct diff_filespec *one,
+ struct diff_filespec *two,
+ const char *xfrm_msg,
+ int complete_rewrite)
+{
+ mmfile_t mf1, mf2;
+ const char *lbl[2];
+ char *a_one, *b_two;
+
+ a_one = quote_two("a/", name_a);
+ b_two = quote_two("b/", name_b);
+ lbl[0] = DIFF_FILE_VALID(one) ? a_one : "/dev/null";
+ lbl[1] = DIFF_FILE_VALID(two) ? b_two : "/dev/null";
+ printf("diff --git %s %s\n", a_one, b_two);
+ if (lbl[0][0] == '/') {
+ /* /dev/null */
+ printf("new file mode %06o\n", two->mode);
if (xfrm_msg && xfrm_msg[0])
puts(xfrm_msg);
}
- else if (!path1[1][0]) {
- printf("deleted file mode %s\n", temp[0].mode);
+ else if (lbl[1][0] == '/') {
+ printf("deleted file mode %06o\n", one->mode);
if (xfrm_msg && xfrm_msg[0])
puts(xfrm_msg);
}
else {
- if (strcmp(temp[0].mode, temp[1].mode)) {
- printf("old mode %s\n", temp[0].mode);
- printf("new mode %s\n", temp[1].mode);
+ if (one->mode != two->mode) {
+ printf("old mode %06o\n", one->mode);
+ printf("new mode %06o\n", two->mode);
}
if (xfrm_msg && xfrm_msg[0])
puts(xfrm_msg);
- if (strncmp(temp[0].mode, temp[1].mode, 3))
- /* we do not run diff between different kind
- * of objects.
- */
- exit(0);
+ /*
+ * we do not run diff between different kind
+ * of objects.
+ */
+ if ((one->mode ^ two->mode) & S_IFMT)
+ goto free_ab_and_return;
if (complete_rewrite) {
- fflush(NULL);
- emit_rewrite_diff(name_a, name_b, temp);
- exit(0);
+ emit_rewrite_diff(name_a, name_b, one, two);
+ goto free_ab_and_return;
}
}
- fflush(NULL);
- execlp("/bin/sh","sh", "-c", cmd, NULL);
+
+ if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0)
+ die("unable to read files to diff");
+
+ if (mmfile_is_binary(&mf1) || mmfile_is_binary(&mf2))
+ printf("Binary files %s and %s differ\n", lbl[0], lbl[1]);
+ else {
+ /* Crazy xdl interfaces.. */
+ const char *diffopts = getenv("GIT_DIFF_OPTS");
+ xpparam_t xpp;
+ xdemitconf_t xecfg;
+ xdemitcb_t ecb;
+ struct emit_callback ecbdata;
+
+ ecbdata.label_path = lbl;
+ xpp.flags = XDF_NEED_MINIMAL;
+ xecfg.ctxlen = 3;
+ xecfg.flags = XDL_EMIT_FUNCNAMES;
+ if (!diffopts)
+ ;
+ else if (!strncmp(diffopts, "--unified=", 10))
+ xecfg.ctxlen = strtoul(diffopts + 10, NULL, 10);
+ else if (!strncmp(diffopts, "-u", 2))
+ xecfg.ctxlen = strtoul(diffopts + 2, NULL, 10);
+ ecb.outf = fn_out;
+ ecb.priv = &ecbdata;
+ xdl_diff(&mf1, &mf2, &xpp, &xecfg, &ecb);
+ }
+
+ free_ab_and_return:
+ free(a_one);
+ free(b_two);
+ return;
}
struct diff_filespec *alloc_filespec(const char *path)
{
int namelen = strlen(path);
struct diff_filespec *spec = xmalloc(sizeof(*spec) + namelen + 1);
+
+ memset(spec, 0, sizeof(*spec));
spec->path = (char *)(spec + 1);
- strcpy(spec->path, path);
- spec->should_free = spec->should_munmap = 0;
- spec->xfrm_flags = 0;
- spec->size = 0;
- spec->data = NULL;
- spec->mode = 0;
- memset(spec->sha1, 0, 20);
+ memcpy(spec->path, path, namelen+1);
return spec;
}
unsigned short mode)
{
if (mode) {
- spec->mode = DIFF_FILE_CANON_MODE(mode);
+ spec->mode = canon_mode(mode);
memcpy(spec->sha1, sha1, 20);
spec->sha1_valid = !!memcmp(sha1, null_sha1, 20);
}
ce = active_cache[pos];
if ((lstat(name, &st) < 0) ||
!S_ISREG(st.st_mode) || /* careful! */
- ce_match_stat(ce, &st) ||
+ ce_match_stat(ce, &st, 0) ||
memcmp(sha1, ce->sha1, 20))
return 0;
/* we return 1 only when we can stat, it is a regular file,
return 0;
}
-void diff_free_filespec(struct diff_filespec *s)
+void diff_free_filespec_data(struct diff_filespec *s)
{
if (s->should_free)
free(s->data);
else if (s->should_munmap)
munmap(s->data, s->size);
- free(s);
+ s->should_free = s->should_munmap = 0;
+ s->data = NULL;
+ free(s->cnt_data);
+ s->cnt_data = NULL;
}
static void prep_temp_blob(struct diff_tempfile *temp,
void *blob,
unsigned long size,
- unsigned char *sha1,
+ const unsigned char *sha1,
int mode)
{
int fd;
}
if (S_ISLNK(st.st_mode)) {
int ret;
- char *buf, buf_[1024];
- buf = ((sizeof(buf_) < st.st_size) ?
- xmalloc(st.st_size) : buf_);
+ char buf[PATH_MAX + 1]; /* ought to be SYMLINK_MAX */
+ if (sizeof(buf) <= st.st_size)
+ die("symlink too long: %s", name);
ret = readlink(name, buf, st.st_size);
if (ret < 0)
die("readlink(%s)", name);
static void remove_tempfile_on_signal(int signo)
{
remove_tempfile();
+ signal(SIGINT, SIG_DFL);
+ raise(signo);
+}
+
+static int spawn_prog(const char *pgm, const char **arg)
+{
+ pid_t pid;
+ int status;
+
+ fflush(NULL);
+ pid = fork();
+ if (pid < 0)
+ die("unable to fork");
+ if (!pid) {
+ execvp(pgm, (char *const*) arg);
+ exit(255);
+ }
+
+ while (waitpid(pid, &status, 0) < 0) {
+ if (errno == EINTR)
+ continue;
+ return -1;
+ }
+
+ /* Earlier we did not check the exit status because
+ * diff exits non-zero if files are different, and
+ * we are not interested in knowing that. It was a
+ * mistake which made it harder to quit a diff-*
+ * session that uses the git-apply-patch-script as
+ * the GIT_EXTERNAL_DIFF. A custom GIT_EXTERNAL_DIFF
+ * should also exit non-zero only when it wants to
+ * abort the entire diff-* session.
+ */
+ if (WIFEXITED(status) && !WEXITSTATUS(status))
+ return 0;
+ return -1;
}
/* An external diff command takes:
const char *xfrm_msg,
int complete_rewrite)
{
+ const char *spawn_arg[10];
struct diff_tempfile *temp = diff_temp;
- pid_t pid;
- int status;
+ int retval;
static int atexit_asked = 0;
+ const char *othername;
+ const char **arg = &spawn_arg[0];
+ othername = (other? other : name);
if (one && two) {
prepare_temp_file(name, &temp[0], one);
- prepare_temp_file(other ? : name, &temp[1], two);
+ prepare_temp_file(othername, &temp[1], two);
if (! atexit_asked &&
(temp[0].name == temp[0].tmp_path ||
temp[1].name == temp[1].tmp_path)) {
signal(SIGINT, remove_tempfile_on_signal);
}
- fflush(NULL);
- pid = fork();
- if (pid < 0)
- die("unable to fork");
- if (!pid) {
- if (pgm) {
- if (one && two) {
- const char *exec_arg[10];
- const char **arg = &exec_arg[0];
- *arg++ = pgm;
- *arg++ = name;
- *arg++ = temp[0].name;
- *arg++ = temp[0].hex;
- *arg++ = temp[0].mode;
- *arg++ = temp[1].name;
- *arg++ = temp[1].hex;
- *arg++ = temp[1].mode;
- if (other) {
- *arg++ = other;
- *arg++ = xfrm_msg;
- }
- *arg = NULL;
- execvp(pgm, (char *const*) exec_arg);
- }
- else
- execlp(pgm, pgm, name, NULL);
+ if (one && two) {
+ *arg++ = pgm;
+ *arg++ = name;
+ *arg++ = temp[0].name;
+ *arg++ = temp[0].hex;
+ *arg++ = temp[0].mode;
+ *arg++ = temp[1].name;
+ *arg++ = temp[1].hex;
+ *arg++ = temp[1].mode;
+ if (other) {
+ *arg++ = other;
+ *arg++ = xfrm_msg;
}
- /*
- * otherwise we use the built-in one.
- */
- if (one && two)
- builtin_diff(name, other ? : name, temp, xfrm_msg,
- complete_rewrite);
- else
- printf("* Unmerged path %s\n", name);
- exit(0);
+ } else {
+ *arg++ = pgm;
+ *arg++ = name;
}
- if (waitpid(pid, &status, 0) < 0 ||
- !WIFEXITED(status) || WEXITSTATUS(status)) {
- /* Earlier we did not check the exit status because
- * diff exits non-zero if files are different, and
- * we are not interested in knowing that. It was a
- * mistake which made it harder to quit a diff-*
- * session that uses the git-apply-patch-script as
- * the GIT_EXTERNAL_DIFF. A custom GIT_EXTERNAL_DIFF
- * should also exit non-zero only when it wants to
- * abort the entire diff-* session.
- */
- remove_tempfile();
+ *arg = NULL;
+ retval = spawn_prog(pgm, spawn_arg);
+ remove_tempfile();
+ if (retval) {
fprintf(stderr, "external diff died, stopping at %s.\n", name);
exit(1);
}
- remove_tempfile();
}
-static void run_diff(struct diff_filepair *p)
+static void run_diff_cmd(const char *pgm,
+ const char *name,
+ const char *other,
+ struct diff_filespec *one,
+ struct diff_filespec *two,
+ const char *xfrm_msg,
+ int complete_rewrite)
+{
+ if (pgm) {
+ run_external_diff(pgm, name, other, one, two, xfrm_msg,
+ complete_rewrite);
+ return;
+ }
+ if (one && two)
+ builtin_diff(name, other ? other : name,
+ one, two, xfrm_msg, complete_rewrite);
+ else
+ printf("* Unmerged path %s\n", name);
+}
+
+static void diff_fill_sha1_info(struct diff_filespec *one)
+{
+ if (DIFF_FILE_VALID(one)) {
+ if (!one->sha1_valid) {
+ struct stat st;
+ if (lstat(one->path, &st) < 0)
+ die("stat %s", one->path);
+ if (index_path(one->sha1, one->path, &st, 0))
+ die("cannot hash %s\n", one->path);
+ }
+ }
+ else
+ memset(one->sha1, 0, 20);
+}
+
+static void run_diff(struct diff_filepair *p, struct diff_options *o)
{
const char *pgm = external_diff();
- char msg_[PATH_MAX*2+200], *xfrm_msg;
+ char msg[PATH_MAX*2+300], *xfrm_msg;
struct diff_filespec *one;
struct diff_filespec *two;
const char *name;
const char *other;
+ char *name_munged, *other_munged;
int complete_rewrite = 0;
+ int len;
if (DIFF_PAIR_UNMERGED(p)) {
/* unmerged */
- run_external_diff(pgm, p->one->path, NULL, NULL, NULL, NULL,
- 0);
+ run_diff_cmd(pgm, p->one->path, NULL, NULL, NULL, NULL, 0);
return;
}
name = p->one->path;
other = (strcmp(name, p->two->path) ? p->two->path : NULL);
+ name_munged = quote_one(name);
+ other_munged = quote_one(other);
one = p->one; two = p->two;
+
+ diff_fill_sha1_info(one);
+ diff_fill_sha1_info(two);
+
+ len = 0;
switch (p->status) {
case DIFF_STATUS_COPIED:
- sprintf(msg_,
- "similarity index %d%%\n"
- "copy from %s\n"
- "copy to %s",
- (int)(0.5 + p->score * 100.0/MAX_SCORE),
- name, other);
- xfrm_msg = msg_;
+ len += snprintf(msg + len, sizeof(msg) - len,
+ "similarity index %d%%\n"
+ "copy from %s\n"
+ "copy to %s\n",
+ (int)(0.5 + p->score * 100.0/MAX_SCORE),
+ name_munged, other_munged);
break;
case DIFF_STATUS_RENAMED:
- sprintf(msg_,
- "similarity index %d%%\n"
- "rename from %s\n"
- "rename to %s",
- (int)(0.5 + p->score * 100.0/MAX_SCORE),
- name, other);
- xfrm_msg = msg_;
+ len += snprintf(msg + len, sizeof(msg) - len,
+ "similarity index %d%%\n"
+ "rename from %s\n"
+ "rename to %s\n",
+ (int)(0.5 + p->score * 100.0/MAX_SCORE),
+ name_munged, other_munged);
break;
case DIFF_STATUS_MODIFIED:
if (p->score) {
- sprintf(msg_,
- "dissimilarity index %d%%",
- (int)(0.5 + p->score * 100.0/MAX_SCORE));
- xfrm_msg = msg_;
+ len += snprintf(msg + len, sizeof(msg) - len,
+ "dissimilarity index %d%%\n",
+ (int)(0.5 + p->score *
+ 100.0/MAX_SCORE));
complete_rewrite = 1;
break;
}
/* fallthru */
default:
- xfrm_msg = NULL;
+ /* nothing */
+ ;
}
+ if (memcmp(one->sha1, two->sha1, 20)) {
+ char one_sha1[41];
+ int abbrev = o->full_index ? 40 : DEFAULT_ABBREV;
+ memcpy(one_sha1, sha1_to_hex(one->sha1), 41);
+
+ len += snprintf(msg + len, sizeof(msg) - len,
+ "index %.*s..%.*s",
+ abbrev, one_sha1, abbrev,
+ sha1_to_hex(two->sha1));
+ if (one->mode == two->mode)
+ len += snprintf(msg + len, sizeof(msg) - len,
+ " %06o", one->mode);
+ len += snprintf(msg + len, sizeof(msg) - len, "\n");
+ }
+
+ if (len)
+ msg[--len] = 0;
+ xfrm_msg = len ? msg : NULL;
+
if (!pgm &&
DIFF_FILE_VALID(one) && DIFF_FILE_VALID(two) &&
(S_IFMT & one->mode) != (S_IFMT & two->mode)) {
* needs to be split into deletion and creation.
*/
struct diff_filespec *null = alloc_filespec(two->path);
- run_external_diff(NULL, name, other, one, null, xfrm_msg, 0);
+ run_diff_cmd(NULL, name, other, one, null, xfrm_msg, 0);
free(null);
null = alloc_filespec(one->path);
- run_external_diff(NULL, name, other, null, two, xfrm_msg, 0);
+ run_diff_cmd(NULL, name, other, null, two, xfrm_msg, 0);
free(null);
}
else
- run_external_diff(pgm, name, other, one, two, xfrm_msg,
- complete_rewrite);
+ run_diff_cmd(pgm, name, other, one, two, xfrm_msg,
+ complete_rewrite);
+
+ free(name_munged);
+ free(other_munged);
+}
+
+void diff_setup(struct diff_options *options)
+{
+ memset(options, 0, sizeof(*options));
+ options->output_format = DIFF_FORMAT_RAW;
+ options->line_termination = '\n';
+ options->break_opt = -1;
+ options->rename_limit = -1;
+
+ options->change = diff_change;
+ options->add_remove = diff_addremove;
}
-void diff_setup(int flags)
+int diff_setup_done(struct diff_options *options)
{
- if (flags & DIFF_SETUP_REVERSE)
- reverse_diff = 1;
- if (flags & DIFF_SETUP_USE_CACHE) {
+ if ((options->find_copies_harder &&
+ options->detect_rename != DIFF_DETECT_COPY) ||
+ (0 <= options->rename_limit && !options->detect_rename))
+ return -1;
+ if (options->detect_rename && options->rename_limit < 0)
+ options->rename_limit = diff_rename_limit_default;
+ if (options->setup & DIFF_SETUP_USE_CACHE) {
if (!active_cache)
/* read-cache does not die even when it fails
* so it is safe for us to do this here. Also
* it does not smudge active_cache or active_nr
* when it fails, so we do not have to worry about
- * cleaning it up oufselves either.
+ * cleaning it up ourselves either.
*/
read_cache();
}
- if (flags & DIFF_SETUP_USE_SIZE_CACHE)
+ if (options->setup & DIFF_SETUP_USE_SIZE_CACHE)
use_size_cache = 1;
-
+ if (options->abbrev <= 0 || 40 < options->abbrev)
+ options->abbrev = 40; /* full */
+
+ return 0;
+}
+
+int diff_opt_parse(struct diff_options *options, const char **av, int ac)
+{
+ const char *arg = av[0];
+ if (!strcmp(arg, "-p") || !strcmp(arg, "-u"))
+ options->output_format = DIFF_FORMAT_PATCH;
+ else if (!strcmp(arg, "-z"))
+ options->line_termination = 0;
+ else if (!strncmp(arg, "-l", 2))
+ options->rename_limit = strtoul(arg+2, NULL, 10);
+ else if (!strcmp(arg, "--full-index"))
+ options->full_index = 1;
+ else if (!strcmp(arg, "--name-only"))
+ options->output_format = DIFF_FORMAT_NAME;
+ else if (!strcmp(arg, "--name-status"))
+ options->output_format = DIFF_FORMAT_NAME_STATUS;
+ else if (!strcmp(arg, "-R"))
+ options->reverse_diff = 1;
+ else if (!strncmp(arg, "-S", 2))
+ options->pickaxe = arg + 2;
+ else if (!strcmp(arg, "-s"))
+ options->output_format = DIFF_FORMAT_NO_OUTPUT;
+ else if (!strncmp(arg, "-O", 2))
+ options->orderfile = arg + 2;
+ else if (!strncmp(arg, "--diff-filter=", 14))
+ options->filter = arg + 14;
+ else if (!strcmp(arg, "--pickaxe-all"))
+ options->pickaxe_opts = DIFF_PICKAXE_ALL;
+ else if (!strncmp(arg, "-B", 2)) {
+ if ((options->break_opt =
+ diff_scoreopt_parse(arg)) == -1)
+ return -1;
+ }
+ else if (!strncmp(arg, "-M", 2)) {
+ if ((options->rename_score =
+ diff_scoreopt_parse(arg)) == -1)
+ return -1;
+ options->detect_rename = DIFF_DETECT_RENAME;
+ }
+ else if (!strncmp(arg, "-C", 2)) {
+ if ((options->rename_score =
+ diff_scoreopt_parse(arg)) == -1)
+ return -1;
+ options->detect_rename = DIFF_DETECT_COPY;
+ }
+ else if (!strcmp(arg, "--find-copies-harder"))
+ options->find_copies_harder = 1;
+ else if (!strcmp(arg, "--abbrev"))
+ options->abbrev = DEFAULT_ABBREV;
+ else if (!strncmp(arg, "--abbrev=", 9)) {
+ options->abbrev = strtoul(arg + 9, NULL, 10);
+ if (options->abbrev < MINIMUM_ABBREV)
+ options->abbrev = MINIMUM_ABBREV;
+ else if (40 < options->abbrev)
+ options->abbrev = 40;
+ }
+ else
+ return 0;
+ return 1;
}
static int parse_num(const char **cp_p)
{
- int num, scale, ch, cnt;
+ unsigned long num, scale;
+ int ch, dot;
const char *cp = *cp_p;
- cnt = num = 0;
+ num = 0;
scale = 1;
- while ('0' <= (ch = *cp) && ch <= '9') {
- if (cnt++ < 5) {
- /* We simply ignore more than 5 digits precision. */
- scale *= 10;
- num = num * 10 + ch - '0';
+ dot = 0;
+ for(;;) {
+ ch = *cp;
+ if ( !dot && ch == '.' ) {
+ scale = 1;
+ dot = 1;
+ } else if ( ch == '%' ) {
+ scale = dot ? scale*100 : 100;
+ cp++; /* % is always at the end */
+ break;
+ } else if ( ch >= '0' && ch <= '9' ) {
+ if ( scale < 100000 ) {
+ scale *= 10;
+ num = (num*10) + (ch-'0');
+ }
+ } else {
+ break;
}
- *cp++;
+ cp++;
}
*cp_p = cp;
/* user says num divided by scale and we say internally that
* is MAX_SCORE * num / scale.
*/
- return (MAX_SCORE * num / scale);
+ return (num >= scale) ? MAX_SCORE : (MAX_SCORE * num / scale);
}
int diff_scoreopt_parse(const char *opt)
dp->status = 0;
dp->source_stays = 0;
dp->broken_pair = 0;
- diff_q(queue, dp);
+ if (queue)
+ diff_q(queue, dp);
return dp;
}
void diff_free_filepair(struct diff_filepair *p)
{
- diff_free_filespec(p->one);
- diff_free_filespec(p->two);
+ diff_free_filespec_data(p->one);
+ diff_free_filespec_data(p->two);
+ free(p->one);
+ free(p->two);
free(p);
}
+/* This is different from find_unique_abbrev() in that
+ * it stuffs the result with dots for alignment.
+ */
+const char *diff_unique_abbrev(const unsigned char *sha1, int len)
+{
+ int abblen;
+ const char *abbrev;
+ if (len == 40)
+ return sha1_to_hex(sha1);
+
+ abbrev = find_unique_abbrev(sha1, len);
+ if (!abbrev)
+ return sha1_to_hex(sha1);
+ abblen = strlen(abbrev);
+ if (abblen < 37) {
+ static char hex[41];
+ if (len < abblen && abblen <= len + 2)
+ sprintf(hex, "%s%.*s", abbrev, len+3-abblen, "..");
+ else
+ sprintf(hex, "%s...", abbrev);
+ return hex;
+ }
+ return sha1_to_hex(sha1);
+}
+
static void diff_flush_raw(struct diff_filepair *p,
int line_termination,
- int inter_name_termination)
+ int inter_name_termination,
+ struct diff_options *options)
{
int two_paths;
char status[10];
+ int abbrev = options->abbrev;
+ const char *path_one, *path_two;
+ int output_format = options->output_format;
+ path_one = p->one->path;
+ path_two = p->two->path;
if (line_termination) {
- const char *const err =
- "path %s cannot be expressed without -z";
- if (strchr(p->one->path, line_termination) ||
- strchr(p->one->path, inter_name_termination))
- die(err, p->one->path);
- if (strchr(p->two->path, line_termination) ||
- strchr(p->two->path, inter_name_termination))
- die(err, p->two->path);
+ path_one = quote_one(path_one);
+ path_two = quote_one(path_two);
}
if (p->score)
two_paths = 0;
break;
}
- printf(":%06o %06o %s ",
- p->one->mode, p->two->mode, sha1_to_hex(p->one->sha1));
- printf("%s %s%c%s",
- sha1_to_hex(p->two->sha1),
- status,
- inter_name_termination,
- p->one->path);
+ if (output_format != DIFF_FORMAT_NAME_STATUS) {
+ printf(":%06o %06o %s ",
+ p->one->mode, p->two->mode,
+ diff_unique_abbrev(p->one->sha1, abbrev));
+ printf("%s ",
+ diff_unique_abbrev(p->two->sha1, abbrev));
+ }
+ printf("%s%c%s", status, inter_name_termination, path_one);
if (two_paths)
- printf("%c%s", inter_name_termination, p->two->path);
+ printf("%c%s", inter_name_termination, path_two);
putchar(line_termination);
+ if (path_one != p->one->path)
+ free((void*)path_one);
+ if (path_two != p->two->path)
+ free((void*)path_two);
}
static void diff_flush_name(struct diff_filepair *p,
+ int inter_name_termination,
int line_termination)
{
- printf("%s%c", p->two->path, line_termination);
+ char *path = p->two->path;
+
+ if (line_termination)
+ path = quote_one(p->two->path);
+ else
+ path = p->two->path;
+ printf("%s%c", path, line_termination);
+ if (p->two->path != path)
+ free(path);
}
int diff_unmodified_pair(struct diff_filepair *p)
return 0;
}
-static void diff_flush_patch(struct diff_filepair *p)
+static void diff_flush_patch(struct diff_filepair *p, struct diff_options *o)
{
if (diff_unmodified_pair(p))
return;
(DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode)))
return; /* no tree diffs in patch format */
- run_diff(p);
+ run_diff(p, o);
}
int diff_queue_is_empty(void)
void diff_debug_filespec(struct diff_filespec *s, int x, const char *one)
{
fprintf(stderr, "queue[%d] %s (%s) %s %06o %s\n",
- x, one ? : "",
+ x, one ? one : "",
s->path,
DIFF_FILE_VALID(s) ? "valid" : "invalid",
s->mode,
s->sha1_valid ? sha1_to_hex(s->sha1) : "");
fprintf(stderr, "queue[%d] %s size %lu flags %d\n",
- x, one ? : "",
+ x, one ? one : "",
s->size, s->xfrm_flags);
}
diff_debug_filespec(p->one, i, "one");
diff_debug_filespec(p->two, i, "two");
fprintf(stderr, "score %d, status %c stays %d broken %d\n",
- p->score, p->status ? : '?',
+ p->score, p->status ? p->status : '?',
p->source_stays, p->broken_pair);
}
}
/* See if there is some other filepair that
* copies from the same source as us. If so
- * we are a copy. Otherwise we are a rename.
+ * we are a copy. Otherwise we are either a
+ * copy if the path stays, or a rename if it
+ * does not, but we already handled "stays" case.
*/
for (j = i + 1; j < q->nr; j++) {
pp = q->queue[j];
diff_debug_queue("resolve-rename-copy done", q);
}
-void diff_flush(int diff_output_style, int line_termination)
+void diff_flush(struct diff_options *options)
{
struct diff_queue_struct *q = &diff_queued_diff;
int i;
int inter_name_termination = '\t';
+ int diff_output_format = options->output_format;
+ int line_termination = options->line_termination;
if (!line_termination)
inter_name_termination = 0;
for (i = 0; i < q->nr; i++) {
struct diff_filepair *p = q->queue[i];
- if ((diff_output_style == DIFF_FORMAT_NO_OUTPUT) ||
+ if ((diff_output_format == DIFF_FORMAT_NO_OUTPUT) ||
(p->status == DIFF_STATUS_UNKNOWN))
continue;
if (p->status == 0)
die("internal error in diff-resolve-rename-copy");
- switch (diff_output_style) {
+ switch (diff_output_format) {
case DIFF_FORMAT_PATCH:
- diff_flush_patch(p);
+ diff_flush_patch(p, options);
break;
case DIFF_FORMAT_RAW:
+ case DIFF_FORMAT_NAME_STATUS:
diff_flush_raw(p, line_termination,
- inter_name_termination);
+ inter_name_termination,
+ options);
break;
case DIFF_FORMAT_NAME:
- diff_flush_name(p, line_termination);
+ diff_flush_name(p,
+ inter_name_termination,
+ line_termination);
break;
}
- }
- for (i = 0; i < q->nr; i++)
diff_free_filepair(q->queue[i]);
+ }
free(q->queue);
q->queue = NULL;
q->nr = q->alloc = 0;
*q = outq;
}
-void diffcore_std(const char **paths,
- int detect_rename, int rename_score,
- const char *pickaxe, int pickaxe_opts,
- int break_opt,
- const char *orderfile,
- const char *filter)
+void diffcore_std(struct diff_options *options)
{
- if (paths && paths[0])
- diffcore_pathspec(paths);
- if (break_opt != -1)
- diffcore_break(break_opt);
- if (detect_rename)
- diffcore_rename(detect_rename, rename_score);
- if (break_opt != -1)
+ if (options->paths && options->paths[0])
+ diffcore_pathspec(options->paths);
+ if (options->break_opt != -1)
+ diffcore_break(options->break_opt);
+ if (options->detect_rename)
+ diffcore_rename(options);
+ if (options->break_opt != -1)
diffcore_merge_broken();
- if (pickaxe)
- diffcore_pickaxe(pickaxe, pickaxe_opts);
- if (orderfile)
- diffcore_order(orderfile);
+ if (options->pickaxe)
+ diffcore_pickaxe(options->pickaxe, options->pickaxe_opts);
+ if (options->orderfile)
+ diffcore_order(options->orderfile);
diff_resolve_rename_copy();
- diffcore_apply_filter(filter);
+ diffcore_apply_filter(options->filter);
}
-void diffcore_std_no_resolve(const char **paths,
- const char *pickaxe, int pickaxe_opts,
- const char *orderfile,
- const char *filter)
+void diffcore_std_no_resolve(struct diff_options *options)
{
- if (paths && paths[0])
- diffcore_pathspec(paths);
- if (pickaxe)
- diffcore_pickaxe(pickaxe, pickaxe_opts);
- if (orderfile)
- diffcore_order(orderfile);
- diffcore_apply_filter(filter);
+ if (options->pickaxe)
+ diffcore_pickaxe(options->pickaxe, options->pickaxe_opts);
+ if (options->orderfile)
+ diffcore_order(options->orderfile);
+ diffcore_apply_filter(options->filter);
}
-void diff_addremove(int addremove, unsigned mode,
+void diff_addremove(struct diff_options *options,
+ int addremove, unsigned mode,
const unsigned char *sha1,
const char *base, const char *path)
{
* Before the final output happens, they are pruned after
* merged into rename/copy pairs as appropriate.
*/
- if (reverse_diff)
+ if (options->reverse_diff)
addremove = (addremove == '+' ? '-' :
addremove == '-' ? '+' : addremove);
diff_queue(&diff_queued_diff, one, two);
}
-void diff_helper_input(unsigned old_mode,
- unsigned new_mode,
- const unsigned char *old_sha1,
- const unsigned char *new_sha1,
- const char *old_path,
- int status,
- int score,
- const char *new_path)
-{
- struct diff_filespec *one, *two;
- struct diff_filepair *dp;
-
- one = alloc_filespec(old_path);
- two = alloc_filespec(new_path);
- if (old_mode)
- fill_filespec(one, old_sha1, old_mode);
- if (new_mode)
- fill_filespec(two, new_sha1, new_mode);
- dp = diff_queue(&diff_queued_diff, one, two);
- dp->score = score * MAX_SCORE / 100;
- dp->status = status;
-}
-
-void diff_change(unsigned old_mode, unsigned new_mode,
+void diff_change(struct diff_options *options,
+ unsigned old_mode, unsigned new_mode,
const unsigned char *old_sha1,
const unsigned char *new_sha1,
const char *base, const char *path)
char concatpath[PATH_MAX];
struct diff_filespec *one, *two;
- if (reverse_diff) {
+ if (options->reverse_diff) {
unsigned tmp;
const unsigned char *tmp_c;
tmp = old_mode; old_mode = new_mode; new_mode = tmp;
diff_queue(&diff_queued_diff, one, two);
}
-void diff_unmerge(const char *path)
+void diff_unmerge(struct diff_options *options,
+ const char *path)
{
struct diff_filespec *one, *two;
one = alloc_filespec(path);