kolibrios-gitea/programs/develop/open watcom/trunk/clib/string/strerr_s.c
Sergey Semyonov (Serge) 836c97f0ac Clib string & memory functions
git-svn-id: svn://kolibrios.org@553 a494cfbc-eb01-0410-851d-a64ba20cac60
2007-06-26 00:54:22 +00:00

100 lines
3.3 KiB
C

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