Clib string & memory functions

git-svn-id: svn://kolibrios.org@553 a494cfbc-eb01-0410-851d-a64ba20cac60

programs/develop/open watcom/trunk/clib/string/strlcpy.c

@@ -0,0 +1,64 @@
+/****************************************************************************
+*
+*                            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:  Implementation of BSD style strlcpy() and wcslcpy().
+*
+****************************************************************************/
+
+
+#include "variety.h"
+#include "widechar.h"
+#include <string.h>
+
+
+_WCRTLINK size_t __F_NAME(strlcpy,wcslcpy)( CHAR_TYPE *dst, const CHAR_TYPE *src, size_t len )
+{
+    const CHAR_TYPE     *s;
+    size_t              count;
+
+    count = len;
+    if( len ) {
+        --len;                  // leave space for terminating null
+        for( ; len; --len ) {
+            if( *src == NULLCHAR ) {
+                break;
+            }
+            *dst++ = *src++;
+        }
+        *dst = NULLCHAR;        // terminate 'dst'
+    } else {
+        ++count;                // account for not decrementing 'len'
+    }
+
+    if( !len ) {                // source string was truncated
+        s = src;
+        while( *s != NULLCHAR ) {
+            ++s;
+        }
+        count += s - src;       // find out how long 'src' really is
+    }
+    return( count - len - 1 );  // final null doesn't count
+}