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a5031214 LT |
1 | #include "cache.h" |
2 | ||
3 | const signed char hexval_table[256] = { | |
4 | -1, -1, -1, -1, -1, -1, -1, -1, /* 00-07 */ | |
5 | -1, -1, -1, -1, -1, -1, -1, -1, /* 08-0f */ | |
6 | -1, -1, -1, -1, -1, -1, -1, -1, /* 10-17 */ | |
7 | -1, -1, -1, -1, -1, -1, -1, -1, /* 18-1f */ | |
8 | -1, -1, -1, -1, -1, -1, -1, -1, /* 20-27 */ | |
9 | -1, -1, -1, -1, -1, -1, -1, -1, /* 28-2f */ | |
10 | 0, 1, 2, 3, 4, 5, 6, 7, /* 30-37 */ | |
11 | 8, 9, -1, -1, -1, -1, -1, -1, /* 38-3f */ | |
12 | -1, 10, 11, 12, 13, 14, 15, -1, /* 40-47 */ | |
13 | -1, -1, -1, -1, -1, -1, -1, -1, /* 48-4f */ | |
14 | -1, -1, -1, -1, -1, -1, -1, -1, /* 50-57 */ | |
15 | -1, -1, -1, -1, -1, -1, -1, -1, /* 58-5f */ | |
16 | -1, 10, 11, 12, 13, 14, 15, -1, /* 60-67 */ | |
17 | -1, -1, -1, -1, -1, -1, -1, -1, /* 68-67 */ | |
18 | -1, -1, -1, -1, -1, -1, -1, -1, /* 70-77 */ | |
19 | -1, -1, -1, -1, -1, -1, -1, -1, /* 78-7f */ | |
20 | -1, -1, -1, -1, -1, -1, -1, -1, /* 80-87 */ | |
21 | -1, -1, -1, -1, -1, -1, -1, -1, /* 88-8f */ | |
22 | -1, -1, -1, -1, -1, -1, -1, -1, /* 90-97 */ | |
23 | -1, -1, -1, -1, -1, -1, -1, -1, /* 98-9f */ | |
24 | -1, -1, -1, -1, -1, -1, -1, -1, /* a0-a7 */ | |
25 | -1, -1, -1, -1, -1, -1, -1, -1, /* a8-af */ | |
26 | -1, -1, -1, -1, -1, -1, -1, -1, /* b0-b7 */ | |
27 | -1, -1, -1, -1, -1, -1, -1, -1, /* b8-bf */ | |
28 | -1, -1, -1, -1, -1, -1, -1, -1, /* c0-c7 */ | |
29 | -1, -1, -1, -1, -1, -1, -1, -1, /* c8-cf */ | |
30 | -1, -1, -1, -1, -1, -1, -1, -1, /* d0-d7 */ | |
31 | -1, -1, -1, -1, -1, -1, -1, -1, /* d8-df */ | |
32 | -1, -1, -1, -1, -1, -1, -1, -1, /* e0-e7 */ | |
33 | -1, -1, -1, -1, -1, -1, -1, -1, /* e8-ef */ | |
34 | -1, -1, -1, -1, -1, -1, -1, -1, /* f0-f7 */ | |
35 | -1, -1, -1, -1, -1, -1, -1, -1, /* f8-ff */ | |
36 | }; | |
37 | ||
0ec21865 RS |
38 | int hex_to_bytes(unsigned char *binary, const char *hex, size_t len) |
39 | { | |
40 | for (; len; len--, hex += 2) { | |
41 | unsigned int val = (hexval(hex[0]) << 4) | hexval(hex[1]); | |
42 | ||
43 | if (val & ~0xff) | |
44 | return -1; | |
45 | *binary++ = val; | |
46 | } | |
47 | return 0; | |
48 | } | |
49 | ||
dadacf10 | 50 | static int get_hash_hex_algop(const char *hex, unsigned char *hash, |
51 | const struct git_hash_algo *algop) | |
a5031214 LT |
52 | { |
53 | int i; | |
dadacf10 | 54 | for (i = 0; i < algop->rawsz; i++) { |
d2330973 RS |
55 | int val = hex2chr(hex); |
56 | if (val < 0) | |
a5031214 | 57 | return -1; |
dadacf10 | 58 | *hash++ = val; |
a5031214 LT |
59 | hex += 2; |
60 | } | |
61 | return 0; | |
62 | } | |
63 | ||
dadacf10 | 64 | int get_sha1_hex(const char *hex, unsigned char *sha1) |
65 | { | |
66 | return get_hash_hex_algop(hex, sha1, the_hash_algo); | |
67 | } | |
68 | ||
69 | int get_oid_hex_algop(const char *hex, struct object_id *oid, | |
70 | const struct git_hash_algo *algop) | |
71 | { | |
5a6dce70 | 72 | int ret = get_hash_hex_algop(hex, oid->hash, algop); |
73 | if (!ret) | |
74 | oid_set_algo(oid, algop); | |
75 | return ret; | |
dadacf10 | 76 | } |
77 | ||
61e2a70f | 78 | /* |
79 | * NOTE: This function relies on hash algorithms being in order from shortest | |
80 | * length to longest length. | |
81 | */ | |
82 | int get_oid_hex_any(const char *hex, struct object_id *oid) | |
83 | { | |
84 | int i; | |
85 | for (i = GIT_HASH_NALGOS - 1; i > 0; i--) { | |
5a6dce70 | 86 | if (!get_oid_hex_algop(hex, oid, &hash_algos[i])) |
61e2a70f | 87 | return i; |
88 | } | |
89 | return GIT_HASH_UNKNOWN; | |
90 | } | |
91 | ||
aa1c6fdf | 92 | int get_oid_hex(const char *hex, struct object_id *oid) |
93 | { | |
dadacf10 | 94 | return get_oid_hex_algop(hex, oid, the_hash_algo); |
aa1c6fdf | 95 | } |
96 | ||
dadacf10 | 97 | int parse_oid_hex_algop(const char *hex, struct object_id *oid, |
98 | const char **end, | |
99 | const struct git_hash_algo *algop) | |
605f430e | 100 | { |
5a6dce70 | 101 | int ret = get_oid_hex_algop(hex, oid, algop); |
605f430e | 102 | if (!ret) |
dadacf10 | 103 | *end = hex + algop->hexsz; |
605f430e | 104 | return ret; |
105 | } | |
106 | ||
61e2a70f | 107 | int parse_oid_hex_any(const char *hex, struct object_id *oid, const char **end) |
108 | { | |
109 | int ret = get_oid_hex_any(hex, oid); | |
110 | if (ret) | |
111 | *end = hex + hash_algos[ret].hexsz; | |
112 | return ret; | |
113 | } | |
114 | ||
dadacf10 | 115 | int parse_oid_hex(const char *hex, struct object_id *oid, const char **end) |
116 | { | |
117 | return parse_oid_hex_algop(hex, oid, end, the_hash_algo); | |
118 | } | |
119 | ||
47edb649 | 120 | char *hash_to_hex_algop_r(char *buffer, const unsigned char *hash, |
121 | const struct git_hash_algo *algop) | |
a5031214 | 122 | { |
a5031214 | 123 | static const char hex[] = "0123456789abcdef"; |
af49c6d0 | 124 | char *buf = buffer; |
a5031214 LT |
125 | int i; |
126 | ||
b8505ecb | 127 | /* |
128 | * Our struct object_id has been memset to 0, so default to printing | |
129 | * using the default hash. | |
130 | */ | |
131 | if (algop == &hash_algos[0]) | |
132 | algop = the_hash_algo; | |
133 | ||
47edb649 | 134 | for (i = 0; i < algop->rawsz; i++) { |
135 | unsigned int val = *hash++; | |
a5031214 LT |
136 | *buf++ = hex[val >> 4]; |
137 | *buf++ = hex[val & 0xf]; | |
138 | } | |
139 | *buf = '\0'; | |
140 | ||
141 | return buffer; | |
142 | } | |
aa1c6fdf | 143 | |
55c529a7 | 144 | char *oid_to_hex_r(char *buffer, const struct object_id *oid) |
145 | { | |
3dd71461 | 146 | return hash_to_hex_algop_r(buffer, oid->hash, &hash_algos[oid->algo]); |
55c529a7 | 147 | } |
148 | ||
47edb649 | 149 | char *hash_to_hex_algop(const unsigned char *hash, const struct git_hash_algo *algop) |
af49c6d0 JK |
150 | { |
151 | static int bufno; | |
dc01505f | 152 | static char hexbuffer[4][GIT_MAX_HEXSZ + 1]; |
bb84735c | 153 | bufno = (bufno + 1) % ARRAY_SIZE(hexbuffer); |
47edb649 | 154 | return hash_to_hex_algop_r(hexbuffer[bufno], hash, algop); |
155 | } | |
156 | ||
47edb649 | 157 | char *hash_to_hex(const unsigned char *hash) |
158 | { | |
159 | return hash_to_hex_algop(hash, the_hash_algo); | |
af49c6d0 JK |
160 | } |
161 | ||
aa1c6fdf | 162 | char *oid_to_hex(const struct object_id *oid) |
163 | { | |
3dd71461 | 164 | return hash_to_hex_algop(oid->hash, &hash_algos[oid->algo]); |
aa1c6fdf | 165 | } |