crypto/external/bsd/heimdal/dist/lib/roken/strlcat.c

   1 /*      $NetBSD: strlcat.c,v 1.1.1.1 2011/04/13 18:15:43 elric Exp $    */
   2
   3 /*
   4  * Copyright (c) 1995-2002 Kungliga Tekniska Högskolan
   5  * (Royal Institute of Technology, Stockholm, Sweden).
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * 3. Neither the name of the Institute nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #include <config.h>
  37 #include <krb5/roken.h>
  38
  39 #ifndef HAVE_STRLCAT
  40
  41 ROKEN_LIB_FUNCTION size_t ROKEN_LIB_CALL
  42 strlcat (char *dst, const char *src, size_t dst_sz)
  43 {
  44     size_t len;
  45 #if defined(_MSC_VER) && _MSC_VER >= 1400
  46     len = strnlen_s(dst, dst_sz);
  47 #elif defined(HAVE_STRNLEN)
  48     len = strnlen(dst, dst_sz);
  49 #else
  50     len = strlen(dst);
  51 #endif
  52
  53     if (dst_sz <= len)
  54         /* the total size of dst is less than the string it contains;
  55            this could be considered bad input, but we might as well
  56            handle it */
  57         return len + strlen(src);
  58
  59     return len + strlcpy (dst + len, src, dst_sz - len);
  60 }
  61
  62 #endif