Git 2.9.3
[git/git.git] / hex.c
CommitLineData
a5031214
LT
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 get_sha1_hex(const char *hex, unsigned char *sha1)
39{
40 int i;
aa1c6fdf 41 for (i = 0; i < GIT_SHA1_RAWSZ; i++) {
d4e85a1a
MH
42 unsigned int val;
43 /*
44 * hex[1]=='\0' is caught when val is checked below,
45 * but if hex[0] is NUL we have to avoid reading
46 * past the end of the string:
47 */
48 if (!hex[0])
49 return -1;
50 val = (hexval(hex[0]) << 4) | hexval(hex[1]);
a5031214
LT
51 if (val & ~0xff)
52 return -1;
53 *sha1++ = val;
54 hex += 2;
55 }
56 return 0;
57}
58
aa1c6fdf 59int get_oid_hex(const char *hex, struct object_id *oid)
60{
61 return get_sha1_hex(hex, oid->hash);
62}
63
af49c6d0 64char *sha1_to_hex_r(char *buffer, const unsigned char *sha1)
a5031214 65{
a5031214 66 static const char hex[] = "0123456789abcdef";
af49c6d0 67 char *buf = buffer;
a5031214
LT
68 int i;
69
aa1c6fdf 70 for (i = 0; i < GIT_SHA1_RAWSZ; i++) {
a5031214
LT
71 unsigned int val = *sha1++;
72 *buf++ = hex[val >> 4];
73 *buf++ = hex[val & 0xf];
74 }
75 *buf = '\0';
76
77 return buffer;
78}
aa1c6fdf 79
af49c6d0
JK
80char *sha1_to_hex(const unsigned char *sha1)
81{
82 static int bufno;
83 static char hexbuffer[4][GIT_SHA1_HEXSZ + 1];
84 return sha1_to_hex_r(hexbuffer[3 & ++bufno], sha1);
85}
86
aa1c6fdf 87char *oid_to_hex(const struct object_id *oid)
88{
89 return sha1_to_hex(oid->hash);
90}