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107 lines
3.8 KiB
C
107 lines
3.8 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 strchr() and wcsrchr().
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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 "riscstr.h"
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#if defined(M_I86) && !defined(__WIDECHAR__)
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extern char *_fast_strrchr( const char _WCFAR *, char );
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#if defined(__SMALL_DATA__)
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#pragma aux _fast_strrchr = \
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0xb9 0xff 0xff /* mov cx,ffffh */ \
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0x30 0xc0 /* xor al,al */ \
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0xf2 0xae /* repne scasb */ \
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0xf7 0xd1 /* not cx */ \
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0x4f /* dec di */ \
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0x88 0xd0 /* mov al,dl */ \
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0xfd /* std */ \
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0xf2 0xae /* repne scasb */ \
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0xfc /* cld */ \
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0x75 0x03 /* jne L1 */ \
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0x89 0xf9 /* mov cx,di */ \
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0x41 /* inc cx */ \
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/* L1: */ \
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parm caller [es di] [dl] \
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value [cx] \
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modify exact [cx ax di];
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#else
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#pragma aux _fast_strrchr = \
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0xb9 0xff 0xff /* mov cx,ffffh */ \
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0x30 0xc0 /* xor al,al */ \
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0xf2 0xae /* repne scasb */ \
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0xf7 0xd1 /* not cx */ \
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0x4f /* dec di */ \
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0x88 0xd8 /* mov al,bl */ \
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0xfd /* std */ \
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0xf2 0xae /* repne scasb */ \
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0xfc /* cld */ \
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0x75 0x04 /* jne L1 */ \
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0x89 0xf9 /* mov cx,di */ \
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0x41 /* inc cx */ \
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0xa9 /* hide 2 bytes */ \
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0x8e 0xc1 /* L1: mov es,cx */ \
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parm caller [es di] [bl] \
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value [es cx] \
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modify exact [es cx ax di];
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#endif
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#endif
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/* Locate the last occurrence of c in the string pointed to by s.
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The terminating null character is considered to be part of the string.
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If the character c is not found, NULL is returned.
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*/
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#if defined(__RISCSTR__) && defined(__WIDECHAR__)
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_WCRTLINK CHAR_TYPE *__simple_wcsrchr( const CHAR_TYPE *s, INTCHAR_TYPE c )
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#else
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_WCRTLINK CHAR_TYPE *__F_NAME(strrchr,wcsrchr)( const CHAR_TYPE *s, INTCHAR_TYPE c )
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#endif
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{
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#if defined(M_I86) && !defined(__WIDECHAR__)
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return( _fast_strrchr( s, c ) );
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#else
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CHAR_TYPE *p;
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CHAR_TYPE cc = c;
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p = NULL; /* assume c will not be found */
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do {
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if( *s == cc ) p = (CHAR_TYPE *)s;
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} while( *s++ != NULLCHAR );
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return( p );
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#endif
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}
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