contrib/mdocml/compat_strlcpy.c

   1 #ifdef HAVE_CONFIG_H
   2 #include "config.h"
   3 #endif
   4
   5 #ifdef HAVE_STRLCPY
   6
   7 int dummy;
   8
   9 #else
  10
  11 /*      $OpenBSD: strlcpy.c,v 1.11 2006/05/05 15:27:38 millert Exp $    */
  12
  13 /*
  14  * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
  15  *
  16  * Permission to use, copy, modify, and distribute this software for any
  17  * purpose with or without fee is hereby granted, provided that the above
  18  * copyright notice and this permission notice appear in all copies.
  19  *
  20  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  21  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  22  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  23  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  24  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  25  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  26  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  27  */
  28
  29 #include <sys/types.h>
  30 #include <string.h>
  31
  32 /*
  33  * Copy src to string dst of size siz.  At most siz-1 characters
  34  * will be copied.  Always NUL terminates (unless siz == 0).
  35  * Returns strlen(src); if retval >= siz, truncation occurred.
  36  */
  37 size_t
  38 strlcpy(char *dst, const char *src, size_t siz)
  39 {
  40         char *d = dst;
  41         const char *s = src;
  42         size_t n = siz;
  43
  44         /* Copy as many bytes as will fit */
  45         if (n != 0) {
  46                 while (--n != 0) {
  47                         if ((*d++ = *s++) == '\0')
  48                                 break;
  49                 }
  50         }
  51
  52         /* Not enough room in dst, add NUL and traverse rest of src */
  53         if (n == 0) {
  54                 if (siz != 0)
  55                         *d = '\0';              /* NUL-terminate dst */
  56                 while (*s++)
  57                         ;
  58         }
  59
  60         return(s - src - 1);    /* count does not include NUL */
  61 }
  62
  63 #endif