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/strncmp.c
+++ b/watcom/trunk/clib/string/strncmp.c
@@ -0,0 +1,104 @@
+/****************************************************************************
+*
+*                            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 "widechar.h"
+#include <stdio.h>
+#include <string.h>
+#include "riscstr.h"
+
+#if defined(M_I86) && !defined(__WIDECHAR__)
+
+extern int _fast_strncmp( const char *, const char _WCFAR *, size_t );
+
+#if defined(__SMALL_DATA__)
+#pragma aux    _fast_strncmp = \
+        0x89 0xfa       /* mov dx,di */ \
+        0x30 0xc0       /* xor al,al */ \
+        0xf2 0xae       /* repne scasb */ \
+        0x89 0xf9       /* mov cx,di */ \
+        0x89 0xd7       /* mov di,dx */ \
+        0x29 0xf9       /* sub cx,di */ \
+        0xf3 0xa6       /* repe cmpsb */ \
+        0x74 0x05       /* je L1 */ \
+        0x19 0xc9       /* sbb cx,cx */ \
+        0x83 0xd9 0xff  /* sbb cx,ffffh */ \
+                        /* L1: */ \
+        parm caller [si] [es di] [cx] \
+        value [cx] \
+        modify exact [dx ax di cx si];
+#else
+#pragma aux    _fast_strncmp = \
+        0x1e            /* push ds */ \
+        0x8e 0xda       /* mov ds,dx */ \
+        0x89 0xfa       /* mov dx,di */ \
+        0x30 0xc0       /* xor al,al */ \
+        0xf2 0xae       /* repne scasb */ \
+        0x89 0xf9       /* mov cx,di */ \
+        0x89 0xd7       /* mov di,dx */ \
+        0x29 0xf9       /* sub cx,di */ \
+        0xf3 0xa6       /* repe cmpsb */ \
+        0x74 0x05       /* je L1 */ \
+        0x19 0xc9       /* sbb cx,cx */ \
+        0x83 0xd9 0xff  /* sbb cx,ffffh */ \
+                        /* L1: */ \
+        0x1f            /* pop ds */ \
+        parm caller [dx si] [es di] [cx] \
+        value [cx] \
+        modify exact [dx ax di cx si];
+#endif
+#endif
+
+/* return <0 if s<t, 0 if s==t, >0 if s>t */
+
+#if defined(__RISCSTR__) && defined(__WIDECHAR__)
+ _WCRTLINK int __simple_wcsncmp( const CHAR_TYPE *s, const CHAR_TYPE *t, size_t n )
+#else
+ _WCRTLINK int __F_NAME(strncmp,wcsncmp)( const CHAR_TYPE *s, const CHAR_TYPE *t, size_t n )
+#endif
+    {
+#if defined(M_I86) && !defined(__WIDECHAR__)
+        if( n ) {
+            return( _fast_strncmp( s, t, n ) );
+        }
+        return( 0 );
+#else
+        for(;;) {
+            if( n == 0 )     return( 0 );       /* equal */
+            if( *s != *t )   return( *s - *t ); /* less than or greater than */
+            if( *s == NULLCHAR ) return( 0 );       /* equal */
+            ++s;
+            ++t;
+            --n;
+        }
+#endif
+    }