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1 | #include "cache.h" | |
2 | #include "pack.h" | |
3 | ||
4 | static const char show_index_usage[] = | |
5 | "git show-index"; | |
6 | ||
7 | int cmd_main(int argc, const char **argv) | |
8 | { | |
9 | int i; | |
10 | unsigned nr; | |
11 | unsigned int version; | |
12 | static unsigned int top_index[256]; | |
13 | ||
14 | if (argc != 1) | |
15 | usage(show_index_usage); | |
16 | if (fread(top_index, 2 * 4, 1, stdin) != 1) | |
17 | die("unable to read header"); | |
18 | if (top_index[0] == htonl(PACK_IDX_SIGNATURE)) { | |
19 | version = ntohl(top_index[1]); | |
20 | if (version < 2 || version > 2) | |
21 | die("unknown index version"); | |
22 | if (fread(top_index, 256 * 4, 1, stdin) != 1) | |
23 | die("unable to read index"); | |
24 | } else { | |
25 | version = 1; | |
26 | if (fread(&top_index[2], 254 * 4, 1, stdin) != 1) | |
27 | die("unable to read index"); | |
28 | } | |
29 | nr = 0; | |
30 | for (i = 0; i < 256; i++) { | |
31 | unsigned n = ntohl(top_index[i]); | |
32 | if (n < nr) | |
33 | die("corrupt index file"); | |
34 | nr = n; | |
35 | } | |
36 | if (version == 1) { | |
37 | for (i = 0; i < nr; i++) { | |
38 | unsigned int offset, entry[6]; | |
39 | ||
40 | if (fread(entry, 4 + 20, 1, stdin) != 1) | |
41 | die("unable to read entry %u/%u", i, nr); | |
42 | offset = ntohl(entry[0]); | |
43 | printf("%u %s\n", offset, sha1_to_hex((void *)(entry+1))); | |
44 | } | |
45 | } else { | |
46 | unsigned off64_nr = 0; | |
47 | struct { | |
48 | unsigned char sha1[20]; | |
49 | uint32_t crc; | |
50 | uint32_t off; | |
51 | } *entries; | |
52 | ALLOC_ARRAY(entries, nr); | |
53 | for (i = 0; i < nr; i++) | |
54 | if (fread(entries[i].sha1, 20, 1, stdin) != 1) | |
55 | die("unable to read sha1 %u/%u", i, nr); | |
56 | for (i = 0; i < nr; i++) | |
57 | if (fread(&entries[i].crc, 4, 1, stdin) != 1) | |
58 | die("unable to read crc %u/%u", i, nr); | |
59 | for (i = 0; i < nr; i++) | |
60 | if (fread(&entries[i].off, 4, 1, stdin) != 1) | |
61 | die("unable to read 32b offset %u/%u", i, nr); | |
62 | for (i = 0; i < nr; i++) { | |
63 | uint64_t offset; | |
64 | uint32_t off = ntohl(entries[i].off); | |
65 | if (!(off & 0x80000000)) { | |
66 | offset = off; | |
67 | } else { | |
68 | uint32_t off64[2]; | |
69 | if ((off & 0x7fffffff) != off64_nr) | |
70 | die("inconsistent 64b offset index"); | |
71 | if (fread(off64, 8, 1, stdin) != 1) | |
72 | die("unable to read 64b offset %u", off64_nr); | |
73 | offset = (((uint64_t)ntohl(off64[0])) << 32) | | |
74 | ntohl(off64[1]); | |
75 | off64_nr++; | |
76 | } | |
77 | printf("%" PRIuMAX " %s (%08"PRIx32")\n", | |
78 | (uintmax_t) offset, | |
79 | sha1_to_hex(entries[i].sha1), | |
80 | ntohl(entries[i].crc)); | |
81 | } | |
82 | free(entries); | |
83 | } | |
84 | return 0; | |
85 | } |