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/*
* This file is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, version 2,
* as published by the Free Software Foundation.
*
* In addition to the permissions in the GNU General Public License,
* the authors give you unlimited permission to link the compiled
* version of this file into combinations with other programs,
* and to distribute those combinations without any restriction
* coming from the use of this file. (The General Public License
* restrictions do apply in other respects; for example, they cover
* modification of the file, and distribution when not linked into
* a combined executable.)
*
* This file is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "common.h"
#include "git/oid.h"
#include <string.h>
static signed char from_hex[] = {
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 00 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 10 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 20 */
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, -1, -1, -1, -1, -1, -1, /* 30 */
-1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 40 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 50 */
-1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 60 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 70 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 80 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 90 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* a0 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* b0 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* c0 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* d0 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* e0 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* f0 */
};
static char to_hex[] = "0123456789abcdef";
int git_oid_mkstr(git_oid *out, const char *str)
{
size_t p;
for (p = 0; p < sizeof(out->id); p++, str += 2) {
int v = (from_hex[(unsigned char)str[0]] << 4)
| from_hex[(unsigned char)str[1]];
if (v < 0)
return GIT_ENOTOID;
out->id[p] = (unsigned char)v;
}
return GIT_SUCCESS;
}
GIT_INLINE(char) *fmt_one(char *str, unsigned int val)
{
*str++ = to_hex[val >> 4];
*str++ = to_hex[val & 0xf];
return str;
}
void git_oid_fmt(char *str, const git_oid *oid)
{
size_t i;
for (i = 0; i < sizeof(oid->id); i++)
str = fmt_one(str, oid->id[i]);
}
void git_oid_pathfmt(char *str, const git_oid *oid)
{
size_t i;
str = fmt_one(str, oid->id[0]);
*str++ = '/';
for (i = 1; i < sizeof(oid->id); i++)
str = fmt_one(str, oid->id[i]);
}
char *git_oid_allocfmt(const git_oid *oid)
{
char *str = git__malloc(GIT_OID_HEXSZ + 1);
if (!str)
return NULL;
git_oid_fmt(str, oid);
str[GIT_OID_HEXSZ] = '\0';
return str;
}
char *git_oid_to_string(char *out, size_t n, const git_oid *oid)
{
char str[GIT_OID_HEXSZ];
if (!out || n == 0 || !oid)
return "";
n--; /* allow room for terminating NUL */
if (n > 0) {
git_oid_fmt(str, oid);
memcpy(out, str, n > GIT_OID_HEXSZ ? GIT_OID_HEXSZ : n);
}
out[n] = '\0';
return out;
}
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