kolibrios-gitea/programs/develop/open watcom/trunk/clib/string/strpbrk.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
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*    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 <stddef.h>
#include <string.h>
#include "setbits.h"

/*  The strpbrk function locates the first occurrence in the string pointed
    to by str of any character from the string pointed to by charset.
*/


_WCRTLINK CHAR_TYPE *__F_NAME(strpbrk,wcspbrk) ( const CHAR_TYPE *str, const CHAR_TYPE *charset )
{
#if defined(__WIDECHAR__)

    const CHAR_TYPE             *p1;
    const CHAR_TYPE             *p2;
    CHAR_TYPE           tc1;
    CHAR_TYPE           tc2;
    size_t              len;

    len = 0;
    for( p1 = str; tc1 = *p1; p1++, len++ ) {
        for( p2 = charset; tc2 = *p2; p2++ ) {
            if( tc1 == tc2 ) break;
        }
        if( tc2 != NULLCHAR ) return( (CHAR_TYPE *)p1 );
    }
    return( NULL );

#else
    unsigned char tc;
    unsigned char vector[32];

    __setbits( vector, charset );
    for( ; tc = *str; ++str ) {
        /* quit when we find any char in charset */
        if( ( vector[ tc >> 3 ] & _Bits[ tc & 0x07 ] ) != 0 )
             return( (char *)str );
    }
    return( NULL );
#endif
}