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100 lines
3.3 KiB
C
100 lines
3.3 KiB
C
/****************************************************************************
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*
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* Open Watcom Project
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*
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* Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
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*
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* ========================================================================
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*
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* This file contains Original Code and/or Modifications of Original
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* Code as defined in and that are subject to the Sybase Open Watcom
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* Public License version 1.0 (the 'License'). You may not use this file
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* except in compliance with the License. BY USING THIS FILE YOU AGREE TO
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* ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
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* provided with the Original Code and Modifications, and is also
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* available at www.sybase.com/developer/opensource.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
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* ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
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* NON-INFRINGEMENT. Please see the License for the specific language
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* governing rights and limitations under the License.
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*
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* ========================================================================
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*
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* Description: Implementation of strerror_s() - bounds checking strerror().
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*
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****************************************************************************/
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#include "variety.h"
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#include "saferlib.h"
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#include "widechar.h"
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#include <string.h>
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#include <wchar.h>
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#include <errno.h>
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#include "errstr.h"
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_WCRTLINK errno_t __F_NAME(strerror_s,wcserror_s)( CHAR_TYPE *s,
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rsize_t maxsize,
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errno_t errnum )
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/*****************************************************************/
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{
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errno_t rc = -1;
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#ifdef __WIDECHAR__
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wchar_t Wide_Error_String[ 128 ];
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#endif
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char *msg;
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CHAR_TYPE *p;
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CHAR_TYPE *p2;
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size_t msglen;
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int k;
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/* runtime-constraints */
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// s not NULL
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// maxsize <= RSIZE_MAX
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// maxsize != 0
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if( __check_constraint_nullptr( s ) &&
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__check_constraint_maxsize( maxsize ) &&
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__check_constraint_zero( maxsize ) ) {
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if( errnum < 0 || errnum >= _sys_nerr ) {
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msg = UNKNOWN_ERROR;
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} else {
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msg = _sys_errlist[ errnum ];
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}
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msglen = strlen( msg );
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#ifdef __WIDECHAR__
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_AToUni( Wide_Error_String, msg );
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p2 = Wide_Error_String;
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#else
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p2 = msg;
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#endif
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p = s;
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k = 0;
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// copy string up to end of string or end of receiving field
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while ( (k < maxsize - 1) && (*p2 != NULLCHAR) ) {
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*p++ = *p2++;
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++k;
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};
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if( (maxsize > 3) && (msglen > maxsize - 4) ) {
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/* msg does not fit, indicate it's incomplete */
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/* and terminate string */
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__F_NAME(strcpy,wcscpy)( p - 3, STRING( "..." ) );
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} else {
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*p = NULLCHAR; // terminate string
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}
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if( msglen < maxsize) {
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rc = 0; // msg not truncated
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}
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}
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return( rc );
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}
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