strlcpy.c

VC＋＋源代码

/* 
 * $smu-mark$ 
 * $name: strLcpy.c$ 
 * $author: Nicolas Jombart <[e-mail]>$ 
 * $copyright: Copyright (C) 1999 by Salvatore Sanfilippo$
 * *copyright: (c) 1998 Todd C. Miller <[e-mail]>$ 
 * $license: This software is under GPL version 2 of license$ 
 * $date: Wed Feb 13 17:02:32 CET 2002$ 
 * $rev:$ 
 */ 

/*      $OpenBSD: strlcpy.c,v 1.4 1999/05/01 18:56:41 millert Exp $     */

/*
 * Copyright (c) 1998 Todd C. Miller <[e-mail]>
 * All rights reserved.
 *
 * 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. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED ``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 AUTHOR 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(__FreeBSD__) && !defined(__OpenBSD__) && !defined(__NetBSD__) && \
    !defined(__bsdi__) && !defined(__APPLE__)
#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(dst, src, siz)
  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 */
}

#endif /* ! __*BSD__ */