#include "packfile.h"
#include "fetch-object.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 = {
* With "map" == NULL, try reading the object named with "sha1" using
* the streaming interface and rehash it to do the same.
*/
-int check_sha1_signature(const unsigned char *sha1, void *map,
- unsigned long size, const char *type)
+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[32];
+ char hdr[MAX_HEADER_LEN];
int hdrlen;
if (map) {
hash_object_file(map, size, type, &real_oid);
- return hashcmp(sha1, real_oid.hash) ? -1 : 0;
+ return oidcmp(oid, &real_oid) ? -1 : 0;
}
- st = open_istream(sha1, &obj_type, &size, NULL);
+ st = open_istream(oid, &obj_type, &size, NULL);
if (!st)
return -1;
}
the_hash_algo->final_fn(real_oid.hash, &c);
close_istream(st);
- return hashcmp(sha1, real_oid.hash) ? -1 : 0;
+ return oidcmp(oid, &real_oid) ? -1 : 0;
}
int git_open_cloexec(const char *name, int flags)
unsigned long mapsize;
void *map;
git_zstream stream;
- char hdr[32];
+ char hdr[MAX_HEADER_LEN];
struct strbuf hdrbuf = STRBUF_INIT;
unsigned long size_scratch;
int fetch_if_missing = 1;
-int sha1_object_info_extended(const unsigned char *sha1, struct object_info *oi, unsigned flags)
+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 unsigned char *real = (flags & OBJECT_INFO_LOOKUP_REPLACE) ?
- lookup_replace_object(sha1) :
- sha1;
+ const struct object_id *real = oid;
int already_retried = 0;
- if (is_null_sha1(real))
+ 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);
+ struct cached_object *co = find_cached_object(real->hash);
if (co) {
if (oi->typep)
*(oi->typep) = co->type;
}
while (1) {
- if (find_pack_entry(real, &e))
+ if (find_pack_entry(real->hash, &e))
break;
+ if (flags & OBJECT_INFO_IGNORE_LOOSE)
+ return -1;
+
/* Most likely it's a loose object. */
- if (!sha1_loose_object_info(real, oi, flags))
+ if (!sha1_loose_object_info(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();
- if (find_pack_entry(real, &e))
+ if (find_pack_entry(real->hash, &e))
break;
}
* TODO Investigate haveing fetch_object() return
* TODO error/success and stopping the music here.
*/
- fetch_object(repository_format_partial_clone, real);
+ fetch_object(repository_format_partial_clone, real->hash);
already_retried = 1;
continue;
}
return 0;
rtype = packed_object_info(e.p, e.offset, oi);
if (rtype < 0) {
- mark_bad_packed_object(e.p, real);
- return sha1_object_info_extended(real, oi, 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;
}
/* returns enum object_type or negative */
-int sha1_object_info(const unsigned char *sha1, unsigned long *sizep)
+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 (sha1_object_info_extended(sha1, &oi,
- OBJECT_INFO_LOOKUP_REPLACE) < 0)
+ 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;
- if (sha1_object_info_extended(sha1, &oi, 0) < 0)
+ hashcpy(oid.hash, sha1);
+
+ if (oid_object_info_extended(&oid, &oi, 0) < 0)
return NULL;
return content;
}
* deal with them should arrange to call read_object() and give error
* messages themselves.
*/
-void *read_sha1_file_extended(const unsigned char *sha1,
- enum object_type *type,
- unsigned long *size,
- int lookup_replace)
+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 unsigned char *repl = lookup_replace ? lookup_replace_object(sha1)
- : sha1;
+ const struct object_id *repl = lookup_replace ? lookup_replace_object(oid)
+ : oid;
errno = 0;
- data = read_object(repl, type, size);
+ data = read_object(repl->hash, type, size);
if (data)
return data;
if (errno && errno != ENOENT)
- die_errno("failed to read object %s", sha1_to_hex(sha1));
+ 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 != sha1)
+ if (repl != oid)
die("replacement %s not found for %s",
- sha1_to_hex(repl), sha1_to_hex(sha1));
+ oid_to_hex(repl), oid_to_hex(oid));
- if (!stat_sha1_file(repl, &st, &path))
+ if (!stat_sha1_file(repl->hash, &st, &path))
die("loose object %s (stored in %s) is corrupt",
- sha1_to_hex(repl), path);
+ oid_to_hex(repl), path);
- if ((p = has_packed_and_bad(repl)) != NULL)
+ if ((p = has_packed_and_bad(repl->hash)) != NULL)
die("packed object %s (stored in %s) is corrupt",
- sha1_to_hex(repl), p->pack_name);
+ oid_to_hex(repl), p->pack_name);
return NULL;
}
-void *read_object_with_reference(const unsigned char *sha1,
+void *read_object_with_reference(const struct object_id *oid,
const char *required_type_name,
unsigned long *size,
- unsigned char *actual_sha1_return)
+ struct object_id *actual_oid_return)
{
enum object_type type, required_type;
void *buffer;
unsigned long isize;
- unsigned char actual_sha1[20];
+ struct object_id actual_oid;
required_type = type_from_string(required_type_name);
- hashcpy(actual_sha1, sha1);
+ oidcpy(&actual_oid, oid);
while (1) {
int ref_length = -1;
const char *ref_type = NULL;
- buffer = read_sha1_file(actual_sha1, &type, &isize);
+ buffer = read_object_file(&actual_oid, &type, &isize);
if (!buffer)
return NULL;
if (type == required_type) {
*size = isize;
- if (actual_sha1_return)
- hashcpy(actual_sha1_return, actual_sha1);
+ if (actual_oid_return)
+ oidcpy(actual_oid_return, &actual_oid);
return buffer;
}
/* Handle references */
}
ref_length = strlen(ref_type);
- if (ref_length + 40 > isize ||
+ if (ref_length + GIT_SHA1_HEXSZ > isize ||
memcmp(buffer, ref_type, ref_length) ||
- get_sha1_hex((char *) buffer + ref_length, actual_sha1)) {
+ 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_sha1. Check again. */
+ * actual_oid. Check again. */
}
}
int hash_object_file(const void *buf, unsigned long len, const char *type,
struct object_id *oid)
{
- char hdr[32];
+ char hdr[MAX_HEADER_LEN];
int hdrlen = sizeof(hdr);
write_object_file_prepare(buf, len, type, oid, hdr, &hdrlen);
return 0;
int write_object_file(const void *buf, unsigned long len, const char *type,
struct object_id *oid)
{
- char hdr[32];
+ char hdr[MAX_HEADER_LEN];
int hdrlen = sizeof(hdr);
/* Normally if we have it in the pack then we do not bother writing
int hdrlen, status = 0;
/* type string, SP, %lu of the length plus NUL must fit this */
- hdrlen = strlen(type) + 32;
+ hdrlen = strlen(type) + MAX_HEADER_LEN;
header = xmalloc(hdrlen);
write_object_file_prepare(buf, len, type, oid, header, &hdrlen);
void *buf;
unsigned long len;
enum object_type type;
- char hdr[32];
+ char hdr[MAX_HEADER_LEN];
int hdrlen;
int ret;
int has_sha1_file_with_flags(const unsigned char *sha1, int flags)
{
+ struct object_id oid;
if (!startup_info->have_repository)
return 0;
- return sha1_object_info_extended(sha1, NULL,
- flags | OBJECT_INFO_SKIP_CACHED) >= 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)
enum object_type type, const char *path,
unsigned flags)
{
- return index_bulk_checkin(oid->hash, fd, size, type, path, flags);
+ return index_bulk_checkin(oid, fd, size, type, path, flags);
}
int index_fd(struct object_id *oid, int fd, struct stat *st,
return 0;
}
-void assert_sha1_type(const unsigned char *sha1, enum object_type expect)
+void assert_oid_type(const struct object_id *oid, enum object_type expect)
{
- enum object_type type = sha1_object_info(sha1, NULL);
+ enum object_type type = oid_object_info(oid, NULL);
if (type < 0)
- die("%s is not a valid object", sha1_to_hex(sha1));
+ die("%s is not a valid object", oid_to_hex(oid));
if (type != expect)
- die("%s is not a valid '%s' object", sha1_to_hex(sha1),
+ die("%s is not a valid '%s' object", oid_to_hex(oid),
type_name(expect));
}
}
int read_loose_object(const char *path,
- const unsigned char *expected_sha1,
+ const struct object_id *expected_oid,
enum object_type *type,
unsigned long *size,
void **contents)
void *map = NULL;
unsigned long mapsize;
git_zstream stream;
- char hdr[32];
+ char hdr[MAX_HEADER_LEN];
*contents = NULL;
}
if (*type == OBJ_BLOB) {
- if (check_stream_sha1(&stream, hdr, *size, path, expected_sha1) < 0)
+ if (check_stream_sha1(&stream, hdr, *size, path, expected_oid->hash) < 0)
goto out;
} else {
- *contents = unpack_sha1_rest(&stream, hdr, *size, expected_sha1);
+ *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_sha1_signature(expected_sha1, *contents,
+ if (check_object_signature(expected_oid, *contents,
*size, type_name(*type))) {
error("sha1 mismatch for %s (expected %s)", path,
- sha1_to_hex(expected_sha1));
+ oid_to_hex(expected_oid));
free(*contents);
goto out;
}