4 static const char *base_name;
5 static const char unpack_usage[] = "git-unpack-objects basename";
9 unsigned char sha1[20];
12 static struct pack_entry **pack_list;
14 static void *map_file(const char *suffix, unsigned long *sizep)
16 static char pathname[PATH_MAX];
22 len = snprintf(pathname, PATH_MAX, "%s.%s", base_name, suffix);
24 die("bad pack base-name");
25 fd = open(pathname, O_RDONLY);
26 if (fd < 0 || fstat(fd, &st))
27 die("unable to open '%s'", pathname);
30 die("bad pack file '%s'", pathname);
31 map = mmap(NULL, len, PROT_READ, MAP_PRIVATE, fd, 0);
32 if (-1 == (int)(long)map)
33 die("unable to mmap '%s'", pathname);
39 static int sort_by_offset(const void *_a, const void *_b)
41 struct pack_entry *a = *(struct pack_entry **)_a;
42 struct pack_entry *b = *(struct pack_entry **)_b;
45 o1 = ntohl(a->offset);
46 o2 = ntohl(b->offset);
47 return o1 < o2 ? -1 : 1;
50 static int check_index(void *index, unsigned long idx_size)
52 unsigned int *array = index;
57 return error("index file too small");
59 for (i = 0; i < 256; i++) {
60 unsigned int n = ntohl(array[i]);
62 return error("non-monotonic index");
65 if (idx_size != 4*256 + nr * 24) {
66 printf("idx_size=%d, expected %d (%d)\n", idx_size, 4*256 + nr * 24, nr);
67 return error("wrong index file size");
71 pack_list = xmalloc(nr * sizeof(struct pack_entry *));
72 for (i = 0; i < nr; i++)
73 pack_list[i] = index + 4*256 + i*24;
75 qsort(pack_list, nr, sizeof(*pack_list), sort_by_offset);
77 printf("%d entries\n", nr);
81 int main(int argc, char **argv)
84 unsigned long idx_size, pack_size;
87 for (i = 1 ; i < argc; i++) {
88 const char *arg = argv[i];
91 /* Maybe we'll have some flags here some day.. */
100 index = map_file("idx", &idx_size);
101 pack = map_file("pack", &pack_size);
102 if (check_index(index, idx_size) < 0)
103 die("bad index file");