Andrew's git - gitweb.git/blob

   1#include "cache.h"
   2
   3const 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
  38int 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
  50int get_sha1_hex(const char *hex, unsigned char *sha1)
  51{
  52        int i;
  53        for (i = 0; i < the_hash_algo->rawsz; i++) {
  54                int val = hex2chr(hex);
  55                if (val < 0)
  56                        return -1;
  57                *sha1++ = val;
  58                hex += 2;
  59        }
  60        return 0;
  61}
  62
  63int get_oid_hex(const char *hex, struct object_id *oid)
  64{
  65        return get_sha1_hex(hex, oid->hash);
  66}
  67
  68int parse_oid_hex(const char *hex, struct object_id *oid, const char **end)
  69{
  70        int ret = get_oid_hex(hex, oid);
  71        if (!ret)
  72                *end = hex + the_hash_algo->hexsz;
  73        return ret;
  74}
  75
  76char *hash_to_hex_algop_r(char *buffer, const unsigned char *hash,
  77                          const struct git_hash_algo *algop)
  78{
  79        static const char hex[] = "0123456789abcdef";
  80        char *buf = buffer;
  81        int i;
  82
  83        for (i = 0; i < algop->rawsz; i++) {
  84                unsigned int val = *hash++;
  85                *buf++ = hex[val >> 4];
  86                *buf++ = hex[val & 0xf];
  87        }
  88        *buf = '\0';
  89
  90        return buffer;
  91}
  92
  93char *sha1_to_hex_r(char *buffer, const unsigned char *sha1)
  94{
  95        return hash_to_hex_algop_r(buffer, sha1, &hash_algos[GIT_HASH_SHA1]);
  96}
  97
  98char *oid_to_hex_r(char *buffer, const struct object_id *oid)
  99{
 100        return hash_to_hex_algop_r(buffer, oid->hash, the_hash_algo);
 101}
 102
 103char *hash_to_hex_algop(const unsigned char *hash, const struct git_hash_algo *algop)
 104{
 105        static int bufno;
 106        static char hexbuffer[4][GIT_MAX_HEXSZ + 1];
 107        bufno = (bufno + 1) % ARRAY_SIZE(hexbuffer);
 108        return hash_to_hex_algop_r(hexbuffer[bufno], hash, algop);
 109}
 110
 111char *sha1_to_hex(const unsigned char *sha1)
 112{
 113        return hash_to_hex_algop(sha1, &hash_algos[GIT_HASH_SHA1]);
 114}
 115
 116char *hash_to_hex(const unsigned char *hash)
 117{
 118        return hash_to_hex_algop(hash, the_hash_algo);
 119}
 120
 121char *oid_to_hex(const struct object_id *oid)
 122{
 123        return hash_to_hex_algop(oid->hash, the_hash_algo);
 124}