Clib string & memory functions

git-svn-id: svn://kolibrios.org@553 a494cfbc-eb01-0410-851d-a64ba20cac60
2007-06-26 00:54:22 +00:00
parent d5f66e011c
commit 836c97f0ac
162 changed files with 11855 additions and 0 deletions
--- a/watcom/trunk/clib/string/fstrrchr.c
+++ b/watcom/trunk/clib/string/fstrrchr.c
@@ -0,0 +1,78 @@
+/****************************************************************************
+*
+*                            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
+*    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
+*    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 <string.h>
+
+#ifdef  M_I86
+
+extern  char _WCFAR *_fast_strrchr( const char _WCFAR *, char );
+
+#pragma aux    _fast_strrchr = \
+        0xb9 0xff 0xff  /* mov cx,ffffh */ \
+        0x30 0xc0       /* xor al,al */ \
+        0xf2 0xae       /* repne scasb */ \
+        0xf7 0xd1       /* not cx */ \
+        0x4f            /* dec di */ \
+        0x88 0xd8       /* mov al,bl */ \
+        0xfd            /* std */ \
+        0xf2 0xae       /* repne scasb */ \
+        0xfc            /* cld */ \
+        0x75 0x04       /* jne L1 */ \
+        0x89 0xf9       /* mov cx,di */ \
+        0x41            /* inc cx */ \
+        0xa9            /* hide 2 bytes */ \
+        0x8e 0xc1       /* L1: mov es,cx */ \
+        parm caller [es di] [bl] \
+        value [es cx] \
+        modify exact [es cx ax di];
+#endif
+
+/* Locate the last occurrence of c in the string pointed to by s.
+   The terminating null character is considered to be part of the string.
+   If the character c is not found, NULL is returned.
+*/
+
+_WCRTLINK char _WCFAR *_fstrrchr( const char _WCFAR *s, int c )
+    {
+#if defined(M_I86)
+        return( _fast_strrchr( s, c ) );
+#else
+        char _WCFAR *p;
+
+        p = NULL;       /* assume c will not be found */
+        do {
+            if( *s == c ) p = (char _WCFAR *)s;
+        } while( *s++ != '\0' );
+        return( p );
+#endif
+    }