IABSD.fr/src/lib/libc/string/wcslcat.c

Branch : - branch - master - tag -

• Show log

  Commit

• Author : millert
  Date : 2019-01-25 00:19:25
  Hash : bf198cc6
  Message : I am retiring my old email address; replace it with my OpenBSD one.

• lib/libc/string/wcslcat.c

• /*	$OpenBSD: wcslcat.c,v 1.7 2019/01/25 00:19:25 millert Exp $	*/
  
  /*
   * Copyright (c) 1998, 2015 Todd C. Miller <millert@openbsd.org>
   *
   * 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 THE AUTHOR DISCLAIMS ALL WARRANTIES
   * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
   * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR 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.
   */
  
  #include <sys/types.h>
  #include <wchar.h>
  
  /*
   * Appends src to string dst of size dsize (unlike strncat, dsize is the
   * full size of dst, not space left).  At most dsize-1 characters
   * will be copied.  Always NUL terminates (unless dsize <= wcslen(dst)).
   * Returns wcslen(src) + MIN(dsize, wcslen(initial dst)).
   * If retval >= siz, truncation occurred.
   */
  size_t
  wcslcat(wchar_t *dst, const wchar_t *src, size_t dsize)
  {
  	const wchar_t *odst = dst;
  	const wchar_t *osrc = src;
  	size_t n = dsize;
  	size_t dlen;
  
  	/* Find the end of dst and adjust bytes left but don't go past end. */
  	while (n-- != 0 && *dst != L'\0')
  		dst++;
  	dlen = dst - odst;
  	n = dsize - dlen;
  
  	if (n-- == 0)
  		return(dlen + wcslen(src));
  	while (*src != L'\0') {
  		if (n != 0) {
  			*dst++ = *src;
  			n--;
  		}
  		src++;
  	}
  	*dst = L'\0';
  
  	return(dlen + (src - osrc));	/* count does not include NUL */
  }
  DEF_WEAK(wcslcat);