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53 lines
1.3 KiB
C
53 lines
1.3 KiB
C
/* strnlen.h - Re-implementation of GLIBC strnlen()
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*
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* Copyright (c) 2016-2020 Joachim Nilsson <troglobit@gmail.com>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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#ifndef LITE_STRNLEN_H_
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#define LITE_STRNLEN_H_
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#if !defined(HAVE_STRNLEN)
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#if defined(strnlen)
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#define HAVE_STRNLEN 1
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#endif
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#endif
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#if !HAVE_STRNLEN
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#include <stddef.h> /* size_t */
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#define strnlen(str, lim) xstrnlen(str, lim)
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static inline size_t xstrnlen(const char *str, size_t lim)
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{
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size_t i = 0;
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while (str[i] && i < lim)
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i++;
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return i;
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}
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#endif
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#endif /* LITE_STRNLEN_H_ */
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#ifdef __cplusplus
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}
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#endif
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