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Commit | Line | Data |
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ff417260 | 1 | #include "builtin.h" |
0271611e | 2 | #include "cache.h" |
32637cdf | 3 | #include "pack.h" |
88a09a55 | 4 | #include "parse-options.h" |
0271611e | 5 | |
88a09a55 | 6 | static const char *const show_index_usage[] = { |
7 | "git show-index [--object-format=<hash-algorithm>]", | |
8 | NULL | |
9 | }; | |
03c5c102 | 10 | |
ff417260 | 11 | int cmd_show_index(int argc, const char **argv, const char *prefix) |
0271611e LT |
12 | { |
13 | int i; | |
14 | unsigned nr; | |
32637cdf | 15 | unsigned int version; |
0271611e | 16 | static unsigned int top_index[256]; |
88a09a55 | 17 | unsigned hashsz; |
18 | const char *hash_name = NULL; | |
19 | int hash_algo; | |
20 | const struct option show_index_options[] = { | |
21 | OPT_STRING(0, "object-format", &hash_name, N_("hash-algorithm"), | |
22 | N_("specify the hash algorithm to use")), | |
23 | OPT_END() | |
24 | }; | |
25 | ||
26 | argc = parse_options(argc, argv, prefix, show_index_options, show_index_usage, 0); | |
27 | ||
28 | if (hash_name) { | |
29 | hash_algo = hash_algo_by_name(hash_name); | |
30 | if (hash_algo == GIT_HASH_UNKNOWN) | |
31 | die(_("Unknown hash algorithm")); | |
32 | repo_set_hash_algo(the_repository, hash_algo); | |
33 | } | |
34 | ||
35 | hashsz = the_hash_algo->rawsz; | |
0271611e | 36 | |
32637cdf NP |
37 | if (fread(top_index, 2 * 4, 1, stdin) != 1) |
38 | die("unable to read header"); | |
39 | if (top_index[0] == htonl(PACK_IDX_SIGNATURE)) { | |
40 | version = ntohl(top_index[1]); | |
41 | if (version < 2 || version > 2) | |
42 | die("unknown index version"); | |
43 | if (fread(top_index, 256 * 4, 1, stdin) != 1) | |
44 | die("unable to read index"); | |
45 | } else { | |
46 | version = 1; | |
47 | if (fread(&top_index[2], 254 * 4, 1, stdin) != 1) | |
48 | die("unable to read index"); | |
49 | } | |
0271611e LT |
50 | nr = 0; |
51 | for (i = 0; i < 256; i++) { | |
52 | unsigned n = ntohl(top_index[i]); | |
53 | if (n < nr) | |
54 | die("corrupt index file"); | |
55 | nr = n; | |
56 | } | |
32637cdf NP |
57 | if (version == 1) { |
58 | for (i = 0; i < nr; i++) { | |
7962e046 | 59 | unsigned int offset, entry[(GIT_MAX_RAWSZ + 4) / sizeof(unsigned int)]; |
0271611e | 60 | |
7962e046 | 61 | if (fread(entry, 4 + hashsz, 1, stdin) != 1) |
32637cdf NP |
62 | die("unable to read entry %u/%u", i, nr); |
63 | offset = ntohl(entry[0]); | |
be8e172e | 64 | printf("%u %s\n", offset, hash_to_hex((void *)(entry+1))); |
32637cdf NP |
65 | } |
66 | } else { | |
67 | unsigned off64_nr = 0; | |
68 | struct { | |
7962e046 | 69 | struct object_id oid; |
32637cdf NP |
70 | uint32_t crc; |
71 | uint32_t off; | |
b32fa95f JK |
72 | } *entries; |
73 | ALLOC_ARRAY(entries, nr); | |
32637cdf | 74 | for (i = 0; i < nr; i++) |
7962e046 | 75 | if (fread(entries[i].oid.hash, hashsz, 1, stdin) != 1) |
32637cdf NP |
76 | die("unable to read sha1 %u/%u", i, nr); |
77 | for (i = 0; i < nr; i++) | |
78 | if (fread(&entries[i].crc, 4, 1, stdin) != 1) | |
79 | die("unable to read crc %u/%u", i, nr); | |
80 | for (i = 0; i < nr; i++) | |
81 | if (fread(&entries[i].off, 4, 1, stdin) != 1) | |
82 | die("unable to read 32b offset %u/%u", i, nr); | |
83 | for (i = 0; i < nr; i++) { | |
84 | uint64_t offset; | |
85 | uint32_t off = ntohl(entries[i].off); | |
86 | if (!(off & 0x80000000)) { | |
87 | offset = off; | |
88 | } else { | |
89 | uint32_t off64[2]; | |
90 | if ((off & 0x7fffffff) != off64_nr) | |
91 | die("inconsistent 64b offset index"); | |
92 | if (fread(off64, 8, 1, stdin) != 1) | |
93 | die("unable to read 64b offset %u", off64_nr); | |
94 | offset = (((uint64_t)ntohl(off64[0])) << 32) | | |
95 | ntohl(off64[1]); | |
96 | off64_nr++; | |
97 | } | |
6e1c2344 RJ |
98 | printf("%" PRIuMAX " %s (%08"PRIx32")\n", |
99 | (uintmax_t) offset, | |
7962e046 | 100 | oid_to_hex(&entries[i].oid), |
32637cdf NP |
101 | ntohl(entries[i].crc)); |
102 | } | |
103 | free(entries); | |
0271611e LT |
104 | } |
105 | return 0; | |
106 | } |