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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 strcpy_s() - bounds-checking strcpy().
  28. *
  29. ****************************************************************************/
  30.  
  31.  
  32. #include "variety.h"
  33. #include "saferlib.h"
  34. #include "widechar.h"
  35. #include <string.h>
  36. #include <wchar.h>
  37.  
  38.  
  39. _WCRTLINK errno_t __F_NAME(strcpy_s,wcscpy_s)( CHAR_TYPE * __restrict s1,
  40.                           rsize_t s1max, const CHAR_TYPE * __restrict s2 )
  41. /************************************************************************/
  42. {
  43.     errno_t     rc = -1;
  44.     const char  *msg;
  45.  
  46.     // strnlen_s is safe to use as it has no rt constraints
  47.     rsize_t     s2len = __F_NAME(strnlen_s,wcsnlen_s)( s2, s1max );
  48.  
  49.     // Verify runtime-constraints
  50.     // s1 not NULL
  51.     // s2 not NULL
  52.     // s1max <= RSIZE_MAX
  53.     // s1max != 0
  54.     // s1max > strnlen_s( s2, s1max )
  55.     // s1 s2 no overlap
  56.     if( __check_constraint_nullptr_msg( msg, s1 ) &&
  57.         __check_constraint_nullptr_msg( msg, s2 ) &&
  58.         __check_constraint_maxsize_msg( msg, s1max ) &&
  59.         __check_constraint_zero_msg( msg, s1max ) &&
  60.         __check_constraint_a_gt_b_msg( msg, s2len, s1max - 1 ) &&
  61.         __check_constraint_overlap_msg( msg, s1, s1max, s2, s2len ) ) {
  62.  
  63.          while( *s1++ = *s2++)
  64.             ;
  65.  
  66.          rc = 0;
  67.     } else {
  68.         // Runtime-constraints violated, make destination string empty
  69.         if( (s1 != NULL) && (s1max > 0) && __lte_rsizmax( s1max ) ) {
  70.             s1[0] = NULLCHAR;
  71.         }
  72.         // Now call the handler
  73.         __rtct_fail( __func__, msg, NULL );
  74.     }
  75.     return( rc );
  76. }
  77.