File: hexdump_strdup.c

package info (click to toggle)
strace 6.13%2Bds-1
  • links: PTS, VCS
  • area: main
  • in suites: trixie
  • size: 71,488 kB
  • sloc: ansic: 176,497; sh: 9,675; makefile: 4,133; cpp: 885; awk: 353; perl: 267; exp: 62; sed: 9
file content (45 lines) | stat: -rw-r--r-- 853 bytes parent folder | download | duplicates (9)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
/*
 * Make a hexdump copy of C string
 *
 * Copyright (c) 2016-2021 Dmitry V. Levin <ldv@strace.io>
 * All rights reserved.
 *
 * SPDX-License-Identifier: GPL-2.0-or-later
 */

#include "tests.h"

#include <assert.h>
#include <stdlib.h>
#include <string.h>

const char *
hexdump_memdup(const char *src, size_t len)
{
	size_t dst_size = 3 * len + 2;
	assert(dst_size > len);

	char *dst = malloc(dst_size);
	if (!dst)
		perror_msg_and_fail("malloc(%zu)", dst_size);

	char *p = dst;
	const unsigned char *usrc = (const unsigned char *) src;
	for (size_t i = 0; i < len; ++i) {
		unsigned int c = usrc[i];
		*(p++) = ' ';
		if (i == 8)
			*(p++) = ' ';
		*(p++) = "0123456789abcdef"[c >> 4];
		*(p++) = "0123456789abcdef"[c & 0xf];
	}
	*p = '\0';

	return dst;
}

const char *
hexdump_strdup(const char *src)
{
	return hexdump_memdup(src, strlen(src));
}