92 lines
3.8 KiB
C
92 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: 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 <string.h>
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#ifdef M_I86
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extern char _WCFAR * _scan1( char _WCFAR *s, int c );
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/* use scan1 to find the char we are looking for */
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#pragma aux _scan1 = 0x1e /* push ds */\
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0x8e 0xda /* mov ds,dx */\
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0xad /* L1:lodsw */\
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0x38 0xd8 /* cmp al,bl */\
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0x74 0x22 /* je L3 */\
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0x84 0xc0 /* test al,al*/\
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0x74 0x19 /* je L2 */\
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0x38 0xdc /* cmp ah,bl */\
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0x74 0x1b /* je L4 */\
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0x84 0xe4 /* test ah,ah*/\
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0x74 0x11 /* je L2 */\
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0xad /* lodsw */\
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0x38 0xd8 /* cmp al,bl */\
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0x74 0x11 /* je L3 */\
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0x84 0xc0 /* test al,al*/\
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0x74 0x08 /* je L2 */\
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0x38 0xdc /* cmp ah,bl */\
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0x74 0x0a /* je L4 */\
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0x84 0xe4 /* test ah,ah*/\
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0x75 0xde /* jne L1 */\
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0x31 0xf6 /* L2:xor si,si*/\
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0x89 0xf2 /* mov dx,si */\
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0xa9 /* test ax,... */\
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0x4e /* L3:dec si */\
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0x4e /* L4:dec si */\
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0x1f /* pop ds */\
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parm caller [dx si] [bl]\
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value [dx si]\
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modify [ax dx si];
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#endif
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/* locate the first occurrence of c in the initial n characters of the
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string pointed to by s. The terminating null character is considered
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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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#undef _fstrchr
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_WCRTLINK char _WCFAR *_fstrchr( const char _WCFAR *s, int c )
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{
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//#if defined(M_I86)
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//return( _scan1( (char _WCFAR *)s, c ) );
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//#else
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do {
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if( *s == c ) return( (char _WCFAR *)s );
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} while( *s++ != '\0' );
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return( NULL );
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//#endif
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}
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