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79 lines
2.6 KiB
C
79 lines
2.6 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: WHEN YOU FIGURE OUT WHAT THIS FILE DOES, PLEASE
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* DESCRIBE IT HERE!
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*
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****************************************************************************/
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#include "variety.h"
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#include "widechar.h"
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#include <stddef.h>
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#include <string.h>
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#include "setbits.h"
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/* The strspn function computes the length of the initial segment of the
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string pointed to by str which consists entirely of characters from
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the string pointed to by charset.
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*/
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_WCRTLINK size_t __F_NAME(strspn,wcsspn) ( const CHAR_TYPE *str, const CHAR_TYPE *charset )
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{
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#if defined(__WIDECHAR__)
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const CHAR_TYPE *p1;
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const CHAR_TYPE *p2;
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CHAR_TYPE tc1;
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CHAR_TYPE tc2;
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size_t len;
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len = 0;
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for( p1 = str; tc1 = *p1; p1++, len++ ) {
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for( p2 = charset; tc2 = *p2; p2++ ) {
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if( tc1 == tc2 ) break;
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}
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if( tc2 == NULLCHAR ) break;
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}
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return( len );
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#else
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unsigned /*char*/ tc;
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unsigned char vector[32];
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size_t len;
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__setbits( vector, charset );
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len = 0;
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for( ; tc = (unsigned char) *str; ++str, ++len ) {
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/* quit if we find any char not in charset */
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if( ( vector[ tc >> 3 ] & _Bits[ tc & 0x07 ] ) == 0 ) break;
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}
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return( len );
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#endif
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}
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