126 lines
5.4 KiB
C
126 lines
5.4 KiB
C
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/****************************************************************************
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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 wcschr().
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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 * _scan1();
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/* use scan1 to find the char we are looking for */
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#if defined(__SMALL_DATA__)
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#pragma aux _scan1 = 0xad /* L1:lodsw */\
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0x38 0xd0 /* cmp al,dl */\
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0x74 0x20 /* je L3 */\
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0x84 0xc0 /* test al,al*/\
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0x74 0x19 /* je L2 */\
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0x38 0xd4 /* cmp ah,dl */\
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0x74 0x19 /* 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 0xd0 /* cmp al,dl */\
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0x74 0x0f /* je L3 */\
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0x84 0xc0 /* test al,al*/\
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0x74 0x08 /* je L2 */\
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0x38 0xd4 /* cmp ah,dl */\
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0x74 0x08 /* 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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0xa9 /* test ax,... */\
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0x4e /* L3:dec si */\
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0x4e /* L4:dec si */\
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parm caller [si] [dl]\
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value [si]\
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modify [ax si];
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#else
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#pragma aux _scan1 = \
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0x1e /* push ds */ \
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0x8e 0xd9 /* mov ds,cx */ \
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0x8c 0xda /* mov dx,ds */\
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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 [cx 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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#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 strchr
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#if defined(__RISCSTR__) && defined(__WIDECHAR__)
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_WCRTLINK CHAR_TYPE *__simple_wcschr( const CHAR_TYPE *s, INTCHAR_TYPE c )
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#else
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_WCRTLINK CHAR_TYPE *__F_NAME(strchr,wcschr)( const CHAR_TYPE *s, INTCHAR_TYPE c )
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#endif
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{
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CHAR_TYPE cc = c;
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do {
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if( *s == cc ) return( (CHAR_TYPE *)s );
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} while( *s++ != NULLCHAR );
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return( NULL );
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}
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