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git/hex.c
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#include "cache.h" | |
const signed char hexval_table[256] = { | |
-1, -1, -1, -1, -1, -1, -1, -1, /* 00-07 */ | |
-1, -1, -1, -1, -1, -1, -1, -1, /* 08-0f */ | |
-1, -1, -1, -1, -1, -1, -1, -1, /* 10-17 */ | |
-1, -1, -1, -1, -1, -1, -1, -1, /* 18-1f */ | |
-1, -1, -1, -1, -1, -1, -1, -1, /* 20-27 */ | |
-1, -1, -1, -1, -1, -1, -1, -1, /* 28-2f */ | |
0, 1, 2, 3, 4, 5, 6, 7, /* 30-37 */ | |
8, 9, -1, -1, -1, -1, -1, -1, /* 38-3f */ | |
-1, 10, 11, 12, 13, 14, 15, -1, /* 40-47 */ | |
-1, -1, -1, -1, -1, -1, -1, -1, /* 48-4f */ | |
-1, -1, -1, -1, -1, -1, -1, -1, /* 50-57 */ | |
-1, -1, -1, -1, -1, -1, -1, -1, /* 58-5f */ | |
-1, 10, 11, 12, 13, 14, 15, -1, /* 60-67 */ | |
-1, -1, -1, -1, -1, -1, -1, -1, /* 68-67 */ | |
-1, -1, -1, -1, -1, -1, -1, -1, /* 70-77 */ | |
-1, -1, -1, -1, -1, -1, -1, -1, /* 78-7f */ | |
-1, -1, -1, -1, -1, -1, -1, -1, /* 80-87 */ | |
-1, -1, -1, -1, -1, -1, -1, -1, /* 88-8f */ | |
-1, -1, -1, -1, -1, -1, -1, -1, /* 90-97 */ | |
-1, -1, -1, -1, -1, -1, -1, -1, /* 98-9f */ | |
-1, -1, -1, -1, -1, -1, -1, -1, /* a0-a7 */ | |
-1, -1, -1, -1, -1, -1, -1, -1, /* a8-af */ | |
-1, -1, -1, -1, -1, -1, -1, -1, /* b0-b7 */ | |
-1, -1, -1, -1, -1, -1, -1, -1, /* b8-bf */ | |
-1, -1, -1, -1, -1, -1, -1, -1, /* c0-c7 */ | |
-1, -1, -1, -1, -1, -1, -1, -1, /* c8-cf */ | |
-1, -1, -1, -1, -1, -1, -1, -1, /* d0-d7 */ | |
-1, -1, -1, -1, -1, -1, -1, -1, /* d8-df */ | |
-1, -1, -1, -1, -1, -1, -1, -1, /* e0-e7 */ | |
-1, -1, -1, -1, -1, -1, -1, -1, /* e8-ef */ | |
-1, -1, -1, -1, -1, -1, -1, -1, /* f0-f7 */ | |
-1, -1, -1, -1, -1, -1, -1, -1, /* f8-ff */ | |
}; | |
int get_sha1_hex(const char *hex, unsigned char *sha1) | |
{ | |
int i; | |
for (i = 0; i < GIT_SHA1_RAWSZ; i++) { | |
unsigned int val; | |
/* | |
* hex[1]=='\0' is caught when val is checked below, | |
* but if hex[0] is NUL we have to avoid reading | |
* past the end of the string: | |
*/ | |
if (!hex[0]) | |
return -1; | |
val = (hexval(hex[0]) << 4) | hexval(hex[1]); | |
if (val & ~0xff) | |
return -1; | |
*sha1++ = val; | |
hex += 2; | |
} | |
return 0; | |
} | |
int get_oid_hex(const char *hex, struct object_id *oid) | |
{ | |
return get_sha1_hex(hex, oid->hash); | |
} | |
char *sha1_to_hex_r(char *buffer, const unsigned char *sha1) | |
{ | |
static const char hex[] = "0123456789abcdef"; | |
char *buf = buffer; | |
int i; | |
for (i = 0; i < GIT_SHA1_RAWSZ; i++) { | |
unsigned int val = *sha1++; | |
*buf++ = hex[val >> 4]; | |
*buf++ = hex[val & 0xf]; | |
} | |
*buf = '\0'; | |
return buffer; | |
} | |
char *sha1_to_hex(const unsigned char *sha1) | |
{ | |
static int bufno; | |
static char hexbuffer[4][GIT_SHA1_HEXSZ + 1]; | |
return sha1_to_hex_r(hexbuffer[3 & ++bufno], sha1); | |
} | |
char *oid_to_hex(const struct object_id *oid) | |
{ | |
return sha1_to_hex(oid->hash); | |
} |