mirror of
https://github.com/git/git.git
synced 2024-11-27 12:03:55 +08:00
bb84735c80
Overflow is defined for unsigned integers, but not for signed ones. We could make the ring-buffer index in sha1_to_hex() and get_pathname() unsigned to be on the safe side to resolve this, but let's make it explicit that we are wrapping around at whatever the number of elements the ring-buffer has. The compiler is smart enough to turn modulus into bitmask for these codepaths that use ring-buffers of a size that is a power of 2. Signed-off-by: René Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
89 lines
2.5 KiB
C
89 lines
2.5 KiB
C
#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++) {
|
|
int val = hex2chr(hex);
|
|
if (val < 0)
|
|
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 *oid_to_hex_r(char *buffer, const struct object_id *oid)
|
|
{
|
|
return sha1_to_hex_r(buffer, oid->hash);
|
|
}
|
|
|
|
char *sha1_to_hex(const unsigned char *sha1)
|
|
{
|
|
static int bufno;
|
|
static char hexbuffer[4][GIT_SHA1_HEXSZ + 1];
|
|
bufno = (bufno + 1) % ARRAY_SIZE(hexbuffer);
|
|
return sha1_to_hex_r(hexbuffer[bufno], sha1);
|
|
}
|
|
|
|
char *oid_to_hex(const struct object_id *oid)
|
|
{
|
|
return sha1_to_hex(oid->hash);
|
|
}
|