mirror of https://github.com/adtools/clib2.git
add strnlen()
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@ -62,6 +62,7 @@ extern int strcmp(const char *s1, const char * s2);
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extern int strncmp(const char *s1, const char *s2, size_t n);
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extern char *strcpy(char *dest, const char *src);
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extern char *strncpy(char *dest, const char *src, size_t n);
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extern size_t strnlen(const char *s, size_t maxlen);
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extern size_t strlen(const char *s);
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extern char *strchr(const char *s, int c);
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extern char *strrchr(const char *s, int c);
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@ -310,6 +310,7 @@ C_LIB := \
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string_strncat.o \
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string_strncmp.o \
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string_strncpy.o \
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string_strnlen.o \
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string_strpbrk.o \
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string_strrchr.o \
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string_strspn.o \
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@ -0,0 +1,75 @@
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/*
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* $Id: string_strlen.c,v 1.4 2006-01-08 12:04:27 obarthel Exp $
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*
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* :ts=4
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*
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* Portable ISO 'C' (1994) runtime library for the Amiga computer
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* Copyright (c) 2002-2015 by Olaf Barthel <obarthel (at) gmx.net>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* - Neither the name of Olaf Barthel nor the names of contributors
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* may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _STDLIB_NULL_POINTER_CHECK_H
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#include "stdlib_null_pointer_check.h"
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#endif /* _STDLIB_NULL_POINTER_CHECK_H */
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/****************************************************************************/
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#ifndef _STRING_HEADERS_H
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#include "string_headers.h"
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#endif /* _STRING_HEADERS_H */
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/****************************************************************************/
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size_t
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strnlen(const char *s, size_t maxlen)
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{
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const char * start = s;
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size_t result = 0;
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assert( s != NULL );
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#if defined(CHECK_FOR_NULL_POINTERS)
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{
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if(s == NULL)
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{
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__set_errno(EFAULT);
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goto out;
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}
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}
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#endif /* CHECK_FOR_NULL_POINTERS */
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while((maxlen != 0) && ((*s) != '\0'))
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{
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s++;
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maxlen--;
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}
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result = (size_t)(s - start);
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out:
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return(result);
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}
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