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Commit | Line | Data |
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b73ecb48 | 1 | #include "git-compat-util.h" |
d1cbe1e6 | 2 | #include "hash.h" |
b73ecb48 | 3 | #include "hex.h" |
a5031214 LT |
4 | |
5 | const signed char hexval_table[256] = { | |
6 | -1, -1, -1, -1, -1, -1, -1, -1, /* 00-07 */ | |
7 | -1, -1, -1, -1, -1, -1, -1, -1, /* 08-0f */ | |
8 | -1, -1, -1, -1, -1, -1, -1, -1, /* 10-17 */ | |
9 | -1, -1, -1, -1, -1, -1, -1, -1, /* 18-1f */ | |
10 | -1, -1, -1, -1, -1, -1, -1, -1, /* 20-27 */ | |
11 | -1, -1, -1, -1, -1, -1, -1, -1, /* 28-2f */ | |
12 | 0, 1, 2, 3, 4, 5, 6, 7, /* 30-37 */ | |
13 | 8, 9, -1, -1, -1, -1, -1, -1, /* 38-3f */ | |
14 | -1, 10, 11, 12, 13, 14, 15, -1, /* 40-47 */ | |
15 | -1, -1, -1, -1, -1, -1, -1, -1, /* 48-4f */ | |
16 | -1, -1, -1, -1, -1, -1, -1, -1, /* 50-57 */ | |
17 | -1, -1, -1, -1, -1, -1, -1, -1, /* 58-5f */ | |
18 | -1, 10, 11, 12, 13, 14, 15, -1, /* 60-67 */ | |
19 | -1, -1, -1, -1, -1, -1, -1, -1, /* 68-67 */ | |
20 | -1, -1, -1, -1, -1, -1, -1, -1, /* 70-77 */ | |
21 | -1, -1, -1, -1, -1, -1, -1, -1, /* 78-7f */ | |
22 | -1, -1, -1, -1, -1, -1, -1, -1, /* 80-87 */ | |
23 | -1, -1, -1, -1, -1, -1, -1, -1, /* 88-8f */ | |
24 | -1, -1, -1, -1, -1, -1, -1, -1, /* 90-97 */ | |
25 | -1, -1, -1, -1, -1, -1, -1, -1, /* 98-9f */ | |
26 | -1, -1, -1, -1, -1, -1, -1, -1, /* a0-a7 */ | |
27 | -1, -1, -1, -1, -1, -1, -1, -1, /* a8-af */ | |
28 | -1, -1, -1, -1, -1, -1, -1, -1, /* b0-b7 */ | |
29 | -1, -1, -1, -1, -1, -1, -1, -1, /* b8-bf */ | |
30 | -1, -1, -1, -1, -1, -1, -1, -1, /* c0-c7 */ | |
31 | -1, -1, -1, -1, -1, -1, -1, -1, /* c8-cf */ | |
32 | -1, -1, -1, -1, -1, -1, -1, -1, /* d0-d7 */ | |
33 | -1, -1, -1, -1, -1, -1, -1, -1, /* d8-df */ | |
34 | -1, -1, -1, -1, -1, -1, -1, -1, /* e0-e7 */ | |
35 | -1, -1, -1, -1, -1, -1, -1, -1, /* e8-ef */ | |
36 | -1, -1, -1, -1, -1, -1, -1, -1, /* f0-f7 */ | |
37 | -1, -1, -1, -1, -1, -1, -1, -1, /* f8-ff */ | |
38 | }; | |
39 | ||
0ec21865 RS |
40 | int hex_to_bytes(unsigned char *binary, const char *hex, size_t len) |
41 | { | |
42 | for (; len; len--, hex += 2) { | |
43 | unsigned int val = (hexval(hex[0]) << 4) | hexval(hex[1]); | |
44 | ||
45 | if (val & ~0xff) | |
46 | return -1; | |
47 | *binary++ = val; | |
48 | } | |
49 | return 0; | |
50 | } | |
51 | ||
dadacf10 | 52 | static int get_hash_hex_algop(const char *hex, unsigned char *hash, |
53 | const struct git_hash_algo *algop) | |
a5031214 LT |
54 | { |
55 | int i; | |
dadacf10 | 56 | for (i = 0; i < algop->rawsz; i++) { |
d2330973 RS |
57 | int val = hex2chr(hex); |
58 | if (val < 0) | |
a5031214 | 59 | return -1; |
dadacf10 | 60 | *hash++ = val; |
a5031214 LT |
61 | hex += 2; |
62 | } | |
63 | return 0; | |
64 | } | |
65 | ||
08e5fb12 | 66 | int get_hash_hex(const char *hex, unsigned char *sha1) |
dadacf10 | 67 | { |
68 | return get_hash_hex_algop(hex, sha1, the_hash_algo); | |
69 | } | |
70 | ||
71 | int get_oid_hex_algop(const char *hex, struct object_id *oid, | |
72 | const struct git_hash_algo *algop) | |
73 | { | |
5a6dce70 | 74 | int ret = get_hash_hex_algop(hex, oid->hash, algop); |
75 | if (!ret) | |
76 | oid_set_algo(oid, algop); | |
77 | return ret; | |
dadacf10 | 78 | } |
79 | ||
61e2a70f | 80 | /* |
81 | * NOTE: This function relies on hash algorithms being in order from shortest | |
82 | * length to longest length. | |
83 | */ | |
84 | int get_oid_hex_any(const char *hex, struct object_id *oid) | |
85 | { | |
86 | int i; | |
87 | for (i = GIT_HASH_NALGOS - 1; i > 0; i--) { | |
5a6dce70 | 88 | if (!get_oid_hex_algop(hex, oid, &hash_algos[i])) |
61e2a70f | 89 | return i; |
90 | } | |
91 | return GIT_HASH_UNKNOWN; | |
92 | } | |
93 | ||
aa1c6fdf | 94 | int get_oid_hex(const char *hex, struct object_id *oid) |
95 | { | |
dadacf10 | 96 | return get_oid_hex_algop(hex, oid, the_hash_algo); |
aa1c6fdf | 97 | } |
98 | ||
dadacf10 | 99 | int parse_oid_hex_algop(const char *hex, struct object_id *oid, |
100 | const char **end, | |
101 | const struct git_hash_algo *algop) | |
605f430e | 102 | { |
5a6dce70 | 103 | int ret = get_oid_hex_algop(hex, oid, algop); |
605f430e | 104 | if (!ret) |
dadacf10 | 105 | *end = hex + algop->hexsz; |
605f430e | 106 | return ret; |
107 | } | |
108 | ||
61e2a70f | 109 | int parse_oid_hex_any(const char *hex, struct object_id *oid, const char **end) |
110 | { | |
111 | int ret = get_oid_hex_any(hex, oid); | |
112 | if (ret) | |
113 | *end = hex + hash_algos[ret].hexsz; | |
114 | return ret; | |
115 | } | |
116 | ||
dadacf10 | 117 | int parse_oid_hex(const char *hex, struct object_id *oid, const char **end) |
118 | { | |
119 | return parse_oid_hex_algop(hex, oid, end, the_hash_algo); | |
120 | } | |
121 | ||
47edb649 | 122 | char *hash_to_hex_algop_r(char *buffer, const unsigned char *hash, |
123 | const struct git_hash_algo *algop) | |
a5031214 | 124 | { |
a5031214 | 125 | static const char hex[] = "0123456789abcdef"; |
af49c6d0 | 126 | char *buf = buffer; |
a5031214 LT |
127 | int i; |
128 | ||
b8505ecb | 129 | /* |
130 | * Our struct object_id has been memset to 0, so default to printing | |
131 | * using the default hash. | |
132 | */ | |
133 | if (algop == &hash_algos[0]) | |
134 | algop = the_hash_algo; | |
135 | ||
47edb649 | 136 | for (i = 0; i < algop->rawsz; i++) { |
137 | unsigned int val = *hash++; | |
a5031214 LT |
138 | *buf++ = hex[val >> 4]; |
139 | *buf++ = hex[val & 0xf]; | |
140 | } | |
141 | *buf = '\0'; | |
142 | ||
143 | return buffer; | |
144 | } | |
aa1c6fdf | 145 | |
55c529a7 | 146 | char *oid_to_hex_r(char *buffer, const struct object_id *oid) |
147 | { | |
3dd71461 | 148 | return hash_to_hex_algop_r(buffer, oid->hash, &hash_algos[oid->algo]); |
55c529a7 | 149 | } |
150 | ||
47edb649 | 151 | char *hash_to_hex_algop(const unsigned char *hash, const struct git_hash_algo *algop) |
af49c6d0 JK |
152 | { |
153 | static int bufno; | |
dc01505f | 154 | static char hexbuffer[4][GIT_MAX_HEXSZ + 1]; |
bb84735c | 155 | bufno = (bufno + 1) % ARRAY_SIZE(hexbuffer); |
47edb649 | 156 | return hash_to_hex_algop_r(hexbuffer[bufno], hash, algop); |
157 | } | |
158 | ||
47edb649 | 159 | char *hash_to_hex(const unsigned char *hash) |
160 | { | |
161 | return hash_to_hex_algop(hash, the_hash_algo); | |
af49c6d0 JK |
162 | } |
163 | ||
aa1c6fdf | 164 | char *oid_to_hex(const struct object_id *oid) |
165 | { | |
3dd71461 | 166 | return hash_to_hex_algop(oid->hash, &hash_algos[oid->algo]); |
aa1c6fdf | 167 | } |