mirror of
https://github.com/git/git.git
synced 2024-11-24 02:17:02 +08:00
a034e9106f
The vast majority of files including object-store.h did not need dir.h
nor khash.h. Split the header into two files, and let most just depend
upon object-store-ll.h, while letting the two callers that need it
depend on the full object-store.h.
After this patch:
$ git grep -h include..object-store | sort | uniq -c
2 #include "object-store.h"
129 #include "object-store-ll.h"
Diff best viewed with `--color-moved`.
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
134 lines
2.9 KiB
C
134 lines
2.9 KiB
C
#include "git-compat-util.h"
|
|
#include "gettext.h"
|
|
#include "pack-mtimes.h"
|
|
#include "object-file.h"
|
|
#include "object-store-ll.h"
|
|
#include "packfile.h"
|
|
#include "strbuf.h"
|
|
|
|
static char *pack_mtimes_filename(struct packed_git *p)
|
|
{
|
|
size_t len;
|
|
if (!strip_suffix(p->pack_name, ".pack", &len))
|
|
BUG("pack_name does not end in .pack");
|
|
return xstrfmt("%.*s.mtimes", (int)len, p->pack_name);
|
|
}
|
|
|
|
#define MTIMES_HEADER_SIZE (12)
|
|
|
|
struct mtimes_header {
|
|
uint32_t signature;
|
|
uint32_t version;
|
|
uint32_t hash_id;
|
|
};
|
|
|
|
static int load_pack_mtimes_file(char *mtimes_file,
|
|
uint32_t num_objects,
|
|
const uint32_t **data_p, size_t *len_p)
|
|
{
|
|
int fd, ret = 0;
|
|
struct stat st;
|
|
uint32_t *data = NULL;
|
|
size_t mtimes_size, expected_size;
|
|
struct mtimes_header header;
|
|
|
|
fd = git_open(mtimes_file);
|
|
|
|
if (fd < 0) {
|
|
ret = -1;
|
|
goto cleanup;
|
|
}
|
|
if (fstat(fd, &st)) {
|
|
ret = error_errno(_("failed to read %s"), mtimes_file);
|
|
goto cleanup;
|
|
}
|
|
|
|
mtimes_size = xsize_t(st.st_size);
|
|
|
|
if (mtimes_size < MTIMES_HEADER_SIZE) {
|
|
ret = error(_("mtimes file %s is too small"), mtimes_file);
|
|
goto cleanup;
|
|
}
|
|
|
|
data = xmmap(NULL, mtimes_size, PROT_READ, MAP_PRIVATE, fd, 0);
|
|
|
|
header.signature = ntohl(data[0]);
|
|
header.version = ntohl(data[1]);
|
|
header.hash_id = ntohl(data[2]);
|
|
|
|
if (header.signature != MTIMES_SIGNATURE) {
|
|
ret = error(_("mtimes file %s has unknown signature"), mtimes_file);
|
|
goto cleanup;
|
|
}
|
|
|
|
if (header.version != 1) {
|
|
ret = error(_("mtimes file %s has unsupported version %"PRIu32),
|
|
mtimes_file, header.version);
|
|
goto cleanup;
|
|
}
|
|
|
|
if (!(header.hash_id == 1 || header.hash_id == 2)) {
|
|
ret = error(_("mtimes file %s has unsupported hash id %"PRIu32),
|
|
mtimes_file, header.hash_id);
|
|
goto cleanup;
|
|
}
|
|
|
|
|
|
expected_size = MTIMES_HEADER_SIZE;
|
|
expected_size = st_add(expected_size, st_mult(sizeof(uint32_t), num_objects));
|
|
expected_size = st_add(expected_size, 2 * (header.hash_id == 1 ? GIT_SHA1_RAWSZ : GIT_SHA256_RAWSZ));
|
|
|
|
if (mtimes_size != expected_size) {
|
|
ret = error(_("mtimes file %s is corrupt"), mtimes_file);
|
|
goto cleanup;
|
|
}
|
|
|
|
cleanup:
|
|
if (ret) {
|
|
if (data)
|
|
munmap(data, mtimes_size);
|
|
} else {
|
|
*len_p = mtimes_size;
|
|
*data_p = data;
|
|
}
|
|
|
|
if (fd >= 0)
|
|
close(fd);
|
|
return ret;
|
|
}
|
|
|
|
int load_pack_mtimes(struct packed_git *p)
|
|
{
|
|
char *mtimes_name = NULL;
|
|
int ret = 0;
|
|
|
|
if (!p->is_cruft)
|
|
return ret; /* not a cruft pack */
|
|
if (p->mtimes_map)
|
|
return ret; /* already loaded */
|
|
|
|
ret = open_pack_index(p);
|
|
if (ret < 0)
|
|
goto cleanup;
|
|
|
|
mtimes_name = pack_mtimes_filename(p);
|
|
ret = load_pack_mtimes_file(mtimes_name,
|
|
p->num_objects,
|
|
&p->mtimes_map,
|
|
&p->mtimes_size);
|
|
cleanup:
|
|
free(mtimes_name);
|
|
return ret;
|
|
}
|
|
|
|
uint32_t nth_packed_mtime(struct packed_git *p, uint32_t pos)
|
|
{
|
|
if (!p->mtimes_map)
|
|
BUG("pack .mtimes file not loaded for %s", p->pack_name);
|
|
if (p->num_objects <= pos)
|
|
BUG("pack .mtimes out-of-bounds (%"PRIu32" vs %"PRIu32")",
|
|
pos, p->num_objects);
|
|
|
|
return get_be32(p->mtimes_map + pos + 3);
|
|
}
|