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Commit | Line | Data |
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03eae9af | 1 | #define USE_THE_REPOSITORY_VARIABLE |
41f43b82 PS |
2 | #define DISABLE_SIGN_COMPARE_WARNINGS |
3 | ||
ff417260 | 4 | #include "builtin.h" |
f394e093 | 5 | #include "gettext.h" |
d1cbe1e6 | 6 | #include "hash.h" |
41771fa4 | 7 | #include "hex.h" |
32637cdf | 8 | #include "pack.h" |
88a09a55 | 9 | #include "parse-options.h" |
0271611e | 10 | |
88a09a55 | 11 | static const char *const show_index_usage[] = { |
49edce4f | 12 | "git show-index [--object-format=<hash-algorithm>] < <pack-idx-file>", |
88a09a55 | 13 | NULL |
14 | }; | |
03c5c102 | 15 | |
9b1cb507 JC |
16 | int cmd_show_index(int argc, |
17 | const char **argv, | |
18 | const char *prefix, | |
19 | struct repository *repo UNUSED) | |
0271611e LT |
20 | { |
21 | int i; | |
22 | unsigned nr; | |
32637cdf | 23 | unsigned int version; |
0271611e | 24 | static unsigned int top_index[256]; |
88a09a55 | 25 | unsigned hashsz; |
26 | const char *hash_name = NULL; | |
27 | int hash_algo; | |
28 | const struct option show_index_options[] = { | |
29 | OPT_STRING(0, "object-format", &hash_name, N_("hash-algorithm"), | |
30 | N_("specify the hash algorithm to use")), | |
31 | OPT_END() | |
32 | }; | |
33 | ||
34 | argc = parse_options(argc, argv, prefix, show_index_options, show_index_usage, 0); | |
35 | ||
36 | if (hash_name) { | |
37 | hash_algo = hash_algo_by_name(hash_name); | |
38 | if (hash_algo == GIT_HASH_UNKNOWN) | |
39 | die(_("Unknown hash algorithm")); | |
40 | repo_set_hash_algo(the_repository, hash_algo); | |
41 | } | |
42 | ||
4da8d90f AS |
43 | /* |
44 | * Fallback to SHA1 if we are running outside of a repository. | |
45 | * | |
46 | * TODO: Figure out and implement a way to detect the hash algorithm in use by the | |
47 | * the index file passed in and use that instead. | |
48 | */ | |
49 | if (!the_hash_algo) | |
50 | repo_set_hash_algo(the_repository, GIT_HASH_SHA1); | |
51 | ||
88a09a55 | 52 | hashsz = the_hash_algo->rawsz; |
0271611e | 53 | |
32637cdf NP |
54 | if (fread(top_index, 2 * 4, 1, stdin) != 1) |
55 | die("unable to read header"); | |
56 | if (top_index[0] == htonl(PACK_IDX_SIGNATURE)) { | |
57 | version = ntohl(top_index[1]); | |
58 | if (version < 2 || version > 2) | |
59 | die("unknown index version"); | |
60 | if (fread(top_index, 256 * 4, 1, stdin) != 1) | |
61 | die("unable to read index"); | |
62 | } else { | |
63 | version = 1; | |
64 | if (fread(&top_index[2], 254 * 4, 1, stdin) != 1) | |
65 | die("unable to read index"); | |
66 | } | |
0271611e LT |
67 | nr = 0; |
68 | for (i = 0; i < 256; i++) { | |
69 | unsigned n = ntohl(top_index[i]); | |
70 | if (n < nr) | |
71 | die("corrupt index file"); | |
72 | nr = n; | |
73 | } | |
32637cdf NP |
74 | if (version == 1) { |
75 | for (i = 0; i < nr; i++) { | |
7962e046 | 76 | unsigned int offset, entry[(GIT_MAX_RAWSZ + 4) / sizeof(unsigned int)]; |
0271611e | 77 | |
7962e046 | 78 | if (fread(entry, 4 + hashsz, 1, stdin) != 1) |
32637cdf NP |
79 | die("unable to read entry %u/%u", i, nr); |
80 | offset = ntohl(entry[0]); | |
be8e172e | 81 | printf("%u %s\n", offset, hash_to_hex((void *)(entry+1))); |
32637cdf NP |
82 | } |
83 | } else { | |
84 | unsigned off64_nr = 0; | |
85 | struct { | |
7962e046 | 86 | struct object_id oid; |
32637cdf NP |
87 | uint32_t crc; |
88 | uint32_t off; | |
b32fa95f JK |
89 | } *entries; |
90 | ALLOC_ARRAY(entries, nr); | |
dd15f4f4 | 91 | for (i = 0; i < nr; i++) { |
7962e046 | 92 | if (fread(entries[i].oid.hash, hashsz, 1, stdin) != 1) |
32637cdf | 93 | die("unable to read sha1 %u/%u", i, nr); |
dd15f4f4 | 94 | entries[i].oid.algo = hash_algo_by_ptr(the_hash_algo); |
95 | } | |
32637cdf NP |
96 | for (i = 0; i < nr; i++) |
97 | if (fread(&entries[i].crc, 4, 1, stdin) != 1) | |
98 | die("unable to read crc %u/%u", i, nr); | |
99 | for (i = 0; i < nr; i++) | |
100 | if (fread(&entries[i].off, 4, 1, stdin) != 1) | |
101 | die("unable to read 32b offset %u/%u", i, nr); | |
102 | for (i = 0; i < nr; i++) { | |
103 | uint64_t offset; | |
104 | uint32_t off = ntohl(entries[i].off); | |
105 | if (!(off & 0x80000000)) { | |
106 | offset = off; | |
107 | } else { | |
108 | uint32_t off64[2]; | |
109 | if ((off & 0x7fffffff) != off64_nr) | |
110 | die("inconsistent 64b offset index"); | |
111 | if (fread(off64, 8, 1, stdin) != 1) | |
112 | die("unable to read 64b offset %u", off64_nr); | |
113 | offset = (((uint64_t)ntohl(off64[0])) << 32) | | |
114 | ntohl(off64[1]); | |
115 | off64_nr++; | |
116 | } | |
6e1c2344 RJ |
117 | printf("%" PRIuMAX " %s (%08"PRIx32")\n", |
118 | (uintmax_t) offset, | |
7962e046 | 119 | oid_to_hex(&entries[i].oid), |
32637cdf NP |
120 | ntohl(entries[i].crc)); |
121 | } | |
122 | free(entries); | |
0271611e LT |
123 | } |
124 | return 0; | |
125 | } |