strace/tests/hexquote_strndup.c
Dmitry V. Levin c6782f144a tests: change the license to GPL-2.0-or-later
strace test suite is now provided under the terms of the GNU General
Public License version 2 or later, see tests/COPYING for more details.
2018-12-10 00:00:00 +00:00

39 lines
748 B
C

/*
* Make a hexquoted copy of a string
*
* Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
* 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 *
hexquote_strndup(const char *src, const size_t src_len)
{
const size_t dst_size = 4 * src_len + 1;
assert(dst_size > src_len);
char *dst = malloc(dst_size);
if (!dst)
perror_msg_and_fail("malloc(%zu)", dst_size);
char *p = dst;
size_t i;
for (i = 0; i < src_len; ++i) {
unsigned int c = ((const unsigned char *) src)[i];
*(p++) = '\\';
*(p++) = 'x';
*(p++) = "0123456789abcdef"[c >> 4];
*(p++) = "0123456789abcdef"[c & 0xf];
}
*p = '\0';
return dst;
}