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  1. /****************************************************************************
  2. *
  3. *                            Open Watcom Project
  4. *
  5. *    Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
  6. *
  7. *  ========================================================================
  8. *
  9. *    This file contains Original Code and/or Modifications of Original
  10. *    Code as defined in and that are subject to the Sybase Open Watcom
  11. *    Public License version 1.0 (the 'License'). You may not use this file
  12. *    except in compliance with the License. BY USING THIS FILE YOU AGREE TO
  13. *    ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
  14. *    provided with the Original Code and Modifications, and is also
  15. *    available at www.sybase.com/developer/opensource.
  16. *
  17. *    The Original Code and all software distributed under the License are
  18. *    distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  19. *    EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
  20. *    ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
  21. *    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
  22. *    NON-INFRINGEMENT. Please see the License for the specific language
  23. *    governing rights and limitations under the License.
  24. *
  25. *  ========================================================================
  26. *
  27. * Description:  Implementation of BSD style strlcpy() and wcslcpy().
  28. *
  29. ****************************************************************************/
  30.  
  31.  
  32. #include "variety.h"
  33. #include "widechar.h"
  34. #include <string.h>
  35.  
  36.  
  37. _WCRTLINK size_t __F_NAME(strlcpy,wcslcpy)( CHAR_TYPE *dst, const CHAR_TYPE *src, size_t len )
  38. {
  39.     const CHAR_TYPE     *s;
  40.     size_t              count;
  41.  
  42.     count = len;
  43.     if( len ) {
  44.         --len;                  // leave space for terminating null
  45.         for( ; len; --len ) {
  46.             if( *src == NULLCHAR ) {
  47.                 break;
  48.             }
  49.             *dst++ = *src++;
  50.         }
  51.         *dst = NULLCHAR;        // terminate 'dst'
  52.     } else {
  53.         ++count;                // account for not decrementing 'len'
  54.     }
  55.  
  56.     if( !len ) {                // source string was truncated
  57.         s = src;
  58.         while( *s != NULLCHAR ) {
  59.             ++s;
  60.         }
  61.         count += s - src;       // find out how long 'src' really is
  62.     }
  63.     return( count - len - 1 );  // final null doesn't count
  64. }
  65.