[PATCH] Warning fix for gcc 4
[git/git.git] / pack-check.c
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1#include "cache.h"
2#include "pack.h"
3
4static int verify_packfile(struct packed_git *p)
5{
6 unsigned long index_size = p->index_size;
7 void *index_base = p->index_base;
8 SHA_CTX ctx;
9 unsigned char sha1[20];
10 unsigned long pack_size = p->pack_size;
11 void *pack_base;
12 struct pack_header *hdr;
f3bf9224 13 int nr_objects, err, i;
f9253394 14
f3bf9224 15 /* Header consistency check */
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16 hdr = p->pack_base;
17 if (hdr->hdr_signature != htonl(PACK_SIGNATURE))
18 return error("Packfile signature mismatch", p->pack_name);
19 if (hdr->hdr_version != htonl(PACK_VERSION))
20 return error("Packfile version %d different from ours %d",
21 ntohl(hdr->hdr_version), PACK_VERSION);
22 nr_objects = ntohl(hdr->hdr_entries);
23 if (num_packed_objects(p) != nr_objects)
24 return error("Packfile claims to have %d objects, "
25 "while idx size expects %d", nr_objects,
26 num_packed_objects(p));
27
28 SHA1_Init(&ctx);
29 pack_base = p->pack_base;
30 SHA1_Update(&ctx, pack_base, pack_size - 20);
31 SHA1_Final(sha1, &ctx);
32 if (memcmp(sha1, index_base + index_size - 40, 20))
33 return error("Packfile %s SHA1 mismatch with idx",
34 p->pack_name);
35 if (memcmp(sha1, pack_base + pack_size - 20, 20))
36 return error("Packfile %s SHA1 mismatch with itself",
37 p->pack_name);
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38
39 /* Make sure everything reachable from idx is valid. Since we
40 * have verified that nr_objects matches between idx and pack,
41 * we do not do scan-streaming check on the pack file.
42 */
43 for (i = err = 0; i < nr_objects; i++) {
44 unsigned char sha1[20];
45 struct pack_entry e;
46 void *data;
47 char type[20];
48 unsigned long size;
49
50 if (nth_packed_object_sha1(p, i, sha1))
51 die("internal error pack-check nth-packed-object");
52 if (!find_pack_entry_one(sha1, &e, p))
53 die("internal error pack-check find-pack-entry-one");
54 data = unpack_entry_gently(&e, type, &size);
55 if (!data) {
56 err = error("cannot unpack %s from %s",
57 sha1_to_hex(sha1), p->pack_name);
58 continue;
59 }
60 if (check_sha1_signature(sha1, data, size, type)) {
1038f0c0 61 err = error("packed %s from %s is corrupt",
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62 sha1_to_hex(sha1), p->pack_name);
63 free(data);
64 continue;
65 }
66 free(data);
67 }
68
69 return err;
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70}
71
72
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73static void show_pack_info(struct packed_git *p)
74{
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75 struct pack_header *hdr;
76 int nr_objects, i;
77
78 hdr = p->pack_base;
79 nr_objects = ntohl(hdr->hdr_entries);
80
81 for (i = 0; i < nr_objects; i++) {
82 unsigned char sha1[20], base_sha1[20];
83 struct pack_entry e;
84 char type[20];
85 unsigned long size;
86 unsigned long store_size;
87 int delta_chain_length;
88
89 if (nth_packed_object_sha1(p, i, sha1))
90 die("internal error pack-check nth-packed-object");
91 if (!find_pack_entry_one(sha1, &e, p))
92 die("internal error pack-check find-pack-entry-one");
93
94 packed_object_info_detail(&e, type, &size, &store_size,
95 &delta_chain_length,
96 base_sha1);
97 printf("%s ", sha1_to_hex(sha1));
98 if (!delta_chain_length)
99 printf("%-6s %lu %u\n", type, size, e.offset);
100 else
101 printf("%-6s %lu %u %d %s\n", type, size, e.offset,
102 delta_chain_length, sha1_to_hex(base_sha1));
103 }
104
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105}
106
107int verify_pack(struct packed_git *p, int verbose)
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108{
109 unsigned long index_size = p->index_size;
110 void *index_base = p->index_base;
111 SHA_CTX ctx;
112 unsigned char sha1[20];
113 int ret;
114
f3bf9224 115 ret = 0;
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116 /* Verify SHA1 sum of the index file */
117 SHA1_Init(&ctx);
118 SHA1_Update(&ctx, index_base, index_size - 20);
119 SHA1_Final(sha1, &ctx);
120 if (memcmp(sha1, index_base + index_size - 20, 20))
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121 ret = error("Packfile index for %s SHA1 mismatch",
122 p->pack_name);
123
124 if (!ret) {
125 /* Verify pack file */
126 use_packed_git(p);
127 ret = verify_packfile(p);
128 unuse_packed_git(p);
129 }
130
131 if (verbose) {
132 if (ret)
133 printf("%s: bad\n", p->pack_name);
134 else {
ad8c80a5 135 use_packed_git(p);
f3bf9224 136 show_pack_info(p);
ad8c80a5 137 unuse_packed_git(p);
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138 printf("%s: ok\n", p->pack_name);
139 }
140 }
f9253394 141
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142 return ret;
143}