Sync with 'maint'
[git/gitster.git] / hex.c
blob5ca78a7744113b15ecb154f08ac0ecb524c86d66
1 #define USE_THE_REPOSITORY_VARIABLE
3 #include "git-compat-util.h"
4 #include "hash.h"
5 #include "hex.h"
7 static int get_hash_hex_algop(const char *hex, unsigned char *hash,
8 const struct git_hash_algo *algop)
10 int i;
11 for (i = 0; i < algop->rawsz; i++) {
12 int val = hex2chr(hex);
13 if (val < 0)
14 return -1;
15 *hash++ = val;
16 hex += 2;
18 return 0;
21 int get_hash_hex(const char *hex, unsigned char *sha1)
23 return get_hash_hex_algop(hex, sha1, the_hash_algo);
26 int get_oid_hex_algop(const char *hex, struct object_id *oid,
27 const struct git_hash_algo *algop)
29 int ret = get_hash_hex_algop(hex, oid->hash, algop);
30 if (!ret) {
31 oid_set_algo(oid, algop);
32 if (algop->rawsz != GIT_MAX_RAWSZ)
33 memset(oid->hash + algop->rawsz, 0,
34 GIT_MAX_RAWSZ - algop->rawsz);
36 return ret;
40 * NOTE: This function relies on hash algorithms being in order from shortest
41 * length to longest length.
43 int get_oid_hex_any(const char *hex, struct object_id *oid)
45 int i;
46 for (i = GIT_HASH_NALGOS - 1; i > 0; i--) {
47 if (!get_oid_hex_algop(hex, oid, &hash_algos[i]))
48 return i;
50 return GIT_HASH_UNKNOWN;
53 int get_oid_hex(const char *hex, struct object_id *oid)
55 return get_oid_hex_algop(hex, oid, the_hash_algo);
58 int parse_oid_hex_algop(const char *hex, struct object_id *oid,
59 const char **end,
60 const struct git_hash_algo *algop)
62 int ret = get_oid_hex_algop(hex, oid, algop);
63 if (!ret)
64 *end = hex + algop->hexsz;
65 return ret;
68 int parse_oid_hex_any(const char *hex, struct object_id *oid, const char **end)
70 int ret = get_oid_hex_any(hex, oid);
71 if (ret)
72 *end = hex + hash_algos[ret].hexsz;
73 return ret;
76 int parse_oid_hex(const char *hex, struct object_id *oid, const char **end)
78 return parse_oid_hex_algop(hex, oid, end, the_hash_algo);
81 char *hash_to_hex_algop_r(char *buffer, const unsigned char *hash,
82 const struct git_hash_algo *algop)
84 static const char hex[] = "0123456789abcdef";
85 char *buf = buffer;
86 int i;
89 * Our struct object_id has been memset to 0, so default to printing
90 * using the default hash.
92 if (algop == &hash_algos[0])
93 algop = the_hash_algo;
95 for (i = 0; i < algop->rawsz; i++) {
96 unsigned int val = *hash++;
97 *buf++ = hex[val >> 4];
98 *buf++ = hex[val & 0xf];
100 *buf = '\0';
102 return buffer;
105 char *oid_to_hex_r(char *buffer, const struct object_id *oid)
107 return hash_to_hex_algop_r(buffer, oid->hash, &hash_algos[oid->algo]);
110 char *hash_to_hex_algop(const unsigned char *hash, const struct git_hash_algo *algop)
112 static int bufno;
113 static char hexbuffer[4][GIT_MAX_HEXSZ + 1];
114 bufno = (bufno + 1) % ARRAY_SIZE(hexbuffer);
115 return hash_to_hex_algop_r(hexbuffer[bufno], hash, algop);
118 char *hash_to_hex(const unsigned char *hash)
120 return hash_to_hex_algop(hash, the_hash_algo);
123 char *oid_to_hex(const struct object_id *oid)
125 return hash_to_hex_algop(oid->hash, &hash_algos[oid->algo]);