struct object *parse_object(unsigned char *sha1)
{
unsigned long mapsize;
void *map = map_sha1_file(sha1, &mapsize);
if (map) {
char type[100];
unsigned long size;
void *buffer = unpack_sha1_file(map, mapsize, type, &size);
if (!buffer)
return NULL;
if (check_sha1_signature(sha1, buffer, size, type) < 0)
printf("sha1 mismatch %s\n", sha1_to_hex(sha1));
munmap(map, mapsize);
if (!strcmp(type, "blob")) {
struct blob *ret = lookup_blob(sha1);
parse_blob(ret);
return &ret->object;
} else if (!strcmp(type, "tree")) {
struct tree *ret = lookup_tree(sha1);
parse_tree(ret);
return &ret->object;
} else if (!strcmp(type, "commit")) {
struct commit *ret = lookup_commit(sha1);
parse_commit(ret);
return &ret->object;
} else if (!strcmp(type, "tag")) {
struct tag *ret = lookup_tag(sha1);
parse_tag(ret);
return &ret->object;
} else {
return NULL;
}
}
return NULL;
}
void *sha1_file_read(const unsigned char *sha1, struct sha1_file_hdr *hdr)
{
unsigned long mapsize;
void *map, *buf;
map = map_sha1_file(sha1, &mapsize);
if (map) {
if (verify_sha1_file(sha1, map, mapsize) < 0)
return NULL;
buf = unpack_sha1_file(map, mapsize, hdr);
munmap(map, mapsize);
return buf;
}
return NULL;
}
static open_method_decl(loose)
{
st->u.loose.mapped = map_sha1_file(sha1, &st->u.loose.mapsize);
if (!st->u.loose.mapped)
return -1;
if (unpack_sha1_header(&st->z,
st->u.loose.mapped,
st->u.loose.mapsize,
st->u.loose.hdr,
sizeof(st->u.loose.hdr)) < 0) {
git_inflate_end(&st->z);
munmap(st->u.loose.mapped, st->u.loose.mapsize);
return -1;
}
parse_sha1_header(st->u.loose.hdr, &st->size);
st->u.loose.hdr_used = strlen(st->u.loose.hdr) + 1;
st->u.loose.hdr_avail = st->z.total_out;
st->z_state = z_used;
st->vtbl = &loose_vtbl;
return 0;
}
