kc3-lang/libbsd/src/strnstr.c

• Show log

  Commit

• Hash : 1be0bdb2
  Author :
  Date : 2012-11-25T21:13:38
  

  Add new strnstr() function Taken from FreeBSD.

Download

• src/strnstr.c

• /*-
   * Copyright (c) 2001 Mike Barcroft <mike@FreeBSD.org>
   * Copyright (c) 1990, 1993
   *	The Regents of the University of California.  All rights reserved.
   *
   * This code is derived from software contributed to Berkeley by
   * Chris Torek.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. Neither the name of the University nor the names of its contributors
   *    may be used to endorse or promote products derived from this software
   *    without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   */
  
  #if defined(LIBC_SCCS) && !defined(lint)
  static char sccsid[] = "@(#)strstr.c	8.1 (Berkeley) 6/4/93";
  #endif /* LIBC_SCCS and not lint */
  #include <sys/cdefs.h>
  __FBSDID("$FreeBSD$");
  
  #include <string.h>
  
  /*
   * Find the first occurrence of find in s, where the search is limited to the
   * first slen characters of s.
   */
  char *
  strnstr(const char *s, const char *find, size_t slen)
  {
  	char c, sc;
  	size_t len;
  
  	if ((c = *find++) != '\0') {
  		len = strlen(find);
  		do {
  			do {
  				if (slen-- < 1 || (sc = *s++) == '\0')
  					return (NULL);
  			} while (sc != c);
  			if (len > slen)
  				return (NULL);
  		} while (strncmp(s, find, len) != 0);
  		s--;
  	}
  	return ((char *)s);
  }
  

Download