1 /*
2 * Make a hexdump copy of C string
3 *
4 * Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30 #include "tests.h"
31
32 #include <assert.h>
33 #include <stdlib.h>
34 #include <string.h>
35
36 const char *
hexdump_memdup(const char * src,size_t len)37 hexdump_memdup(const char *src, size_t len)
38 {
39 size_t dst_size = 3 * len + 2;
40 assert(dst_size > len);
41
42 char *dst = malloc(dst_size);
43 if (!dst)
44 perror_msg_and_fail("malloc(%zu)", dst_size);
45
46 char *p = dst;
47 const unsigned char *usrc = (const unsigned char *) src;
48 size_t i;
49 for (i = 0; i < len; ++i) {
50 unsigned int c = usrc[i];
51 *(p++) = ' ';
52 if (i == 8)
53 *(p++) = ' ';
54 *(p++) = "0123456789abcdef"[c >> 4];
55 *(p++) = "0123456789abcdef"[c & 0xf];
56 }
57 *p = '\0';
58
59 return dst;
60 }
61
62 const char *
hexdump_strdup(const char * src)63 hexdump_strdup(const char *src)
64 {
65 return hexdump_memdup(src, strlen(src));
66 }
67