IABSD.fr/xenocara/xserver/os/strlcpy.c

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• Author : matthieu
  Date : 2006-11-26 18:13:41
  Hash : 889b8606
  Message : Importing xserver from X.Org 7.2RC2

• xserver/os/strlcpy.c

• /*	$OpenBSD: strlcpy.c,v 1.1.1.1 2006/11/26 18:16:07 matthieu Exp $	*/
  
  /*
   * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
   *
   * Permission to use, copy, modify, and 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 TODD C. MILLER DISCLAIMS ALL
   * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL TODD C. MILLER 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.
   */
  /* $XFree86$ */
  
  #ifdef HAVE_XORG_CONFIG_H
  #include <xorg-config.h>
  #endif
  
  #include <sys/types.h>
  #include <string.h>
  
  /*
   * Copy src to string dst of size siz.  At most siz-1 characters
   * will be copied.  Always NUL terminates (unless siz == 0).
   * Returns strlen(src); if retval >= siz, truncation occurred.
   */
  size_t
  strlcpy(char *dst, const char *src, size_t siz)
  {
  	register char *d = dst;
  	register const char *s = src;
  	register size_t n = siz;
  
  	/* Copy as many bytes as will fit */
  	if (n != 0 && --n != 0) {
  		do {
  			if ((*d++ = *s++) == 0)
  				break;
  		} while (--n != 0);
  	}
  
  	/* Not enough room in dst, add NUL and traverse rest of src */
  	if (n == 0) {
  		if (siz != 0)
  			*d = '\0';		/* NUL-terminate dst */
  		while (*s++)
  			;
  	}
  
  	return(s - src - 1);	/* count does not include NUL */
  }