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/* strnlen.h - Re-implementation of GLIBC strnlen()
*
* Copyright (c) 2016-2021 Joachim Wiberg <troglobit@gmail.com>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/**
* @file strnlen.h
* @author Joachim Wiberg
* @date 2016-2021
* @copyright ISC License
*/
#ifdef __cplusplus
extern "C"
{
#endif
#ifndef LIBITE_STRNLEN_H_
#define LIBITE_STRNLEN_H_
#if !defined(HAVE_STRNLEN)
#if defined(strnlen)
#define HAVE_STRNLEN 1
#endif
#endif
#if !HAVE_STRNLEN
#include <stddef.h> /* size_t */
#define strnlen(str, lim) xstrnlen(str, lim) /**< Wrapper for xstrnlen() */
/**
* Reimplementation of GLIBC strnlen()
* @param str string to return length of
* @param lim max number of bytes to read
* @returns length of @p str in bytes, but at most @lim bytes.
*/
static inline size_t xstrnlen(const char *str, size_t lim)
{
size_t i = 0;
while (i < lim && str[i])
i++;
return i;
}
#endif
#endif /* LIBITE_STRNLEN_H_ */
#ifdef __cplusplus
}
#endif
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