[babeltrace.git] / include / babeltrace / compat / string.h

#ifndef _BABELTRACE_COMPAT_STRING_H
#define _BABELTRACE_COMPAT_STRING_H

/*
 * Copyright (C) 2013 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

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

#ifdef HAVE_STRNLEN
static inline
size_t bt_strnlen(const char *str, size_t max)
{
	return strnlen(str, max);
}
#else
static inline
size_t bt_strnlen(const char *str, size_t max)
{
	size_t ret;
	const char *end;

	end = memchr(str, 0, max);

	if (end) {
		ret = (size_t) (end - str);
	} else {
		ret = max;
	}

	return ret;
}
#endif /* HAVE_STRNLEN */

#ifdef HAVE_STRNDUP
static inline
char *bt_strndup(const char *s, size_t n)
{
	return strndup(s, n);
}
#else
static inline
char *bt_strndup(const char *s, size_t n)
{
	char *ret;
	size_t navail;

	if (!s) {
		ret = NULL;
		goto end;
	}

	/* min() */
	navail = strlen(s) + 1;
	if ((n + 1) < navail) {
		navail = n + 1;
	}

	ret = malloc(navail);
	if (!ret) {
		goto end;
	}

	memcpy(ret, s, navail);
	ret[navail - 1] = '\0';
end:
	return ret;
}
#endif /* HAVE_STRNDUP */

#endif /* _BABELTRACE_COMPAT_STRING_H */
Commit	Line	Data
9a7f65a3 JI	1	#ifndef _BABELTRACE_COMPAT_STRING_H
	2	#define _BABELTRACE_COMPAT_STRING_H
	3
	4	/*
	5	* Copyright (C) 2013 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	6	*
	7	* Permission is hereby granted, free of charge, to any person obtaining a copy
	8	* of this software and associated documentation files (the "Software"), to deal
	9	* in the Software without restriction, including without limitation the rights
	10	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	11	* copies of the Software, and to permit persons to whom the Software is
	12	* furnished to do so, subject to the following conditions:
	13	*
	14	* The above copyright notice and this permission notice shall be included in
	15	* all copies or substantial portions of the Software.
	16	*
	17	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	18	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	19	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	20	* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	21	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	22	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	23	* SOFTWARE.
	24	*/
	25
	26	#include <string.h>
5ea98697	27	#include <stdlib.h>
9a7f65a3	28
5ea98697 MJ	29	#ifdef HAVE_STRNLEN
	30	static inline
	31	size_t bt_strnlen(const char *str, size_t max)
	32	{
	33	return strnlen(str, max);
	34	}
	35	#else
	36	static inline
	37	size_t bt_strnlen(const char *str, size_t max)
	38	{
	39	size_t ret;
	40	const char *end;
	41
	42	end = memchr(str, 0, max);
	43
	44	if (end) {
	45	ret = (size_t) (end - str);
	46	} else {
	47	ret = max;
	48	}
	49
	50	return ret;
	51	}
	52	#endif /* HAVE_STRNLEN */
	53
	54	#ifdef HAVE_STRNDUP
	55	static inline
	56	char bt_strndup(const char s, size_t n)
	57	{
	58	return strndup(s, n);
	59	}
	60	#else
	61	static inline
	62	char bt_strndup(const char s, size_t n)
	63	{
	64	char *ret;
	65	size_t navail;
	66
	67	if (!s) {
	68	ret = NULL;
	69	goto end;
	70	}
	71
	72	/* min() */
	73	navail = strlen(s) + 1;
	74	if ((n + 1) < navail) {
	75	navail = n + 1;
	76	}
	77
	78	ret = malloc(navail);
	79	if (!ret) {
	80	goto end;
	81	}
	82
	83	memcpy(ret, s, navail);
	84	ret[navail - 1] = '\0';
	85	end:
	86	return ret;
	87	}
	88	#endif /* HAVE_STRNDUP */
	89
9a7f65a3	90	#endif /* _BABELTRACE_COMPAT_STRING_H */