develop/open_watcom: Post-SVN tidy

- Move source code from `trunk` into program root directory.
- Update build files.
- Note: Line endings standardised from `CRLF` > `LF`, so best to view diffs with whitespace changes hidden.

programs/develop/open watcom/clib/string/strcspn.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 "widechar.h"
+#include <stddef.h>
+#include <string.h>
+#include "setbits.h"
+
+/*  The strcspn function computes the length of the initial segment of the
+    string pointed to by str which consists entirely of characters not from
+    the string pointed to by charset. The terminating NULL character is not
+    considered part of charset.
+*/
+
+
+_WCRTLINK size_t __F_NAME(strcspn,wcscspn) ( const CHAR_TYPE *str, const CHAR_TYPE *charset )
+{
+#if defined(__WIDECHAR__)
+
+    const CHAR_TYPE             *p1;
+    const CHAR_TYPE             *p2;
+    CHAR_TYPE           tc1;
+    CHAR_TYPE           tc2;
+    size_t              len;
+
+    len = 0;
+    for( p1 = str; tc1 = *p1; p1++, len++ ) {
+        for( p2 = charset; tc2 = *p2; p2++ ) {
+            if( tc1 == tc2 ) break;
+        }
+        if( tc2 != NULLCHAR ) break;
+    }
+    return( len );
+
+#else
+    unsigned /*char*/ tc;
+    unsigned char vector[32];
+    size_t len;
+
+    __setbits( vector, charset );
+    len = 0;
+    for( ; tc = (unsigned char) *str; ++len, ++str ) {
+        /* quit if we find any char in charset */
+        if( ( vector[ tc >> 3 ] & _Bits[ tc & 0x07 ] ) != 0 )  break;
+    }
+    return( len );
+#endif
+}