1 /*
2  * Copyright (c) 2017 Stefan Sperling <stsp@openbsd.org>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 #include <stdio.h>
18 #include <sha1.h>
19 
20 #include "got_object.h"
21 
22 const char *
23 got_object_id_str(struct got_object_id *id, char *buf, size_t size)
24 {
25 	char *p = buf;
26 	char hex[3];
27 	int i;
28 
29 	if (size < SHA1_DIGEST_STRING_LENGTH)
30 		return NULL;
31 
32 	for (i = 0; i < SHA1_DIGEST_LENGTH; i++) {
33 		snprintf(hex, sizeof(hex), "%.2x", id->sha1[i]);
34 		p[0] = hex[0];
35 		p[1] = hex[1];
36 		p += 2;
37 	}
38 	p[0] = '\0';
39 
40 	return buf;
41 }