| #include "builtin.h" |
| #include "cache.h" |
| #include "pack.h" |
| #include "parse-options.h" |
| |
| static const char *const show_index_usage[] = { |
| "git show-index [--object-format=<hash-algorithm>]", |
| NULL |
| }; |
| |
| int cmd_show_index(int argc, const char **argv, const char *prefix) |
| { |
| int i; |
| unsigned nr; |
| unsigned int version; |
| static unsigned int top_index[256]; |
| unsigned hashsz; |
| const char *hash_name = NULL; |
| int hash_algo; |
| const struct option show_index_options[] = { |
| OPT_STRING(0, "object-format", &hash_name, N_("hash-algorithm"), |
| N_("specify the hash algorithm to use")), |
| OPT_END() |
| }; |
| |
| argc = parse_options(argc, argv, prefix, show_index_options, show_index_usage, 0); |
| |
| if (hash_name) { |
| hash_algo = hash_algo_by_name(hash_name); |
| if (hash_algo == GIT_HASH_UNKNOWN) |
| die(_("Unknown hash algorithm")); |
| repo_set_hash_algo(the_repository, hash_algo); |
| } |
| |
| hashsz = the_hash_algo->rawsz; |
| |
| if (fread(top_index, 2 * 4, 1, stdin) != 1) |
| die("unable to read header"); |
| if (top_index[0] == htonl(PACK_IDX_SIGNATURE)) { |
| version = ntohl(top_index[1]); |
| if (version < 2 || version > 2) |
| die("unknown index version"); |
| if (fread(top_index, 256 * 4, 1, stdin) != 1) |
| die("unable to read index"); |
| } else { |
| version = 1; |
| if (fread(&top_index[2], 254 * 4, 1, stdin) != 1) |
| die("unable to read index"); |
| } |
| nr = 0; |
| for (i = 0; i < 256; i++) { |
| unsigned n = ntohl(top_index[i]); |
| if (n < nr) |
| die("corrupt index file"); |
| nr = n; |
| } |
| if (version == 1) { |
| for (i = 0; i < nr; i++) { |
| unsigned int offset, entry[(GIT_MAX_RAWSZ + 4) / sizeof(unsigned int)]; |
| |
| if (fread(entry, 4 + hashsz, 1, stdin) != 1) |
| die("unable to read entry %u/%u", i, nr); |
| offset = ntohl(entry[0]); |
| printf("%u %s\n", offset, hash_to_hex((void *)(entry+1))); |
| } |
| } else { |
| unsigned off64_nr = 0; |
| struct { |
| struct object_id oid; |
| uint32_t crc; |
| uint32_t off; |
| } *entries; |
| ALLOC_ARRAY(entries, nr); |
| for (i = 0; i < nr; i++) |
| if (fread(entries[i].oid.hash, hashsz, 1, stdin) != 1) |
| die("unable to read sha1 %u/%u", i, nr); |
| for (i = 0; i < nr; i++) |
| if (fread(&entries[i].crc, 4, 1, stdin) != 1) |
| die("unable to read crc %u/%u", i, nr); |
| for (i = 0; i < nr; i++) |
| if (fread(&entries[i].off, 4, 1, stdin) != 1) |
| die("unable to read 32b offset %u/%u", i, nr); |
| for (i = 0; i < nr; i++) { |
| uint64_t offset; |
| uint32_t off = ntohl(entries[i].off); |
| if (!(off & 0x80000000)) { |
| offset = off; |
| } else { |
| uint32_t off64[2]; |
| if ((off & 0x7fffffff) != off64_nr) |
| die("inconsistent 64b offset index"); |
| if (fread(off64, 8, 1, stdin) != 1) |
| die("unable to read 64b offset %u", off64_nr); |
| offset = (((uint64_t)ntohl(off64[0])) << 32) | |
| ntohl(off64[1]); |
| off64_nr++; |
| } |
| printf("%" PRIuMAX " %s (%08"PRIx32")\n", |
| (uintmax_t) offset, |
| oid_to_hex(&entries[i].oid), |
| ntohl(entries[i].crc)); |
| } |
| free(entries); |
| } |
| return 0; |
| } |