kolibrios-gitea/programs/develop/open watcom/trunk/clib/convert/atoi.c
Sergey Semyonov (Serge) 43bd1e645f Clib char & math functions
git-svn-id: svn://kolibrios.org@554 a494cfbc-eb01-0410-851d-a64ba20cac60
2007-06-26 11:19:49 +00:00

60 lines
2.1 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: WHEN YOU FIGURE OUT WHAT THIS FILE DOES, PLEASE
* DESCRIBE IT HERE!
*
****************************************************************************/
#include "variety.h"
#include "widechar.h"
#include <stdio.h>
#ifdef __WIDECHAR__
#include <wctype.h>
#else
#include <ctype.h>
#endif
_WCRTLINK int __F_NAME(atoi,_wtoi)( const CHAR_TYPE *p ) /* convert ASCII string to integer */
{
register int value;
CHAR_TYPE sign;
__ptr_check( p, 0 );
while( __F_NAME(isspace,iswspace)( *p ) ) ++p;
sign = *p;
if( sign == '+' || sign == '-' ) ++p;
value = 0;
while( __F_NAME(isdigit,iswdigit)(*p) ) {
value = value * 10 + *p - '0';
++p;
}
if( sign == '-' ) value = - value;
return( value );
}