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/*******************************************************************************
* Copyright (c) 2000, 2012 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.swt.internal;
import org.eclipse.swt.internal.gtk.OS;
/**
* This class implements the conversions between unicode characters
* and the <em>platform supported</em> representation for characters.
* <p>
* Note that, unicode characters which can not be found in the platform
* encoding will be converted to an arbitrary platform specific character.
* </p>
*/
public final class Converter {
public static final byte [] NullByteArray = new byte [1];
public static final byte [] EmptyByteArray = new byte [0];
public static final char [] EmptyCharArray = new char [0];
/**
* Returns the default code page for the platform where the
* application is currently running.
*
* @return the default code page
*/
public static String defaultCodePage () {
return "UTF8";
}
public static char [] mbcsToWcs (String codePage, byte [] buffer) {
long /*int*/ [] items_written = new long /*int*/ [1];
long /*int*/ ptr = OS.g_utf8_to_utf16 (buffer, buffer.length, null, items_written, null);
if (ptr == 0) return EmptyCharArray;
int length = (int)/*64*/items_written [0];
char [] chars = new char [length];
OS.memmove (chars, ptr, length * 2);
OS.g_free (ptr);
return chars;
}
public static byte [] wcsToMbcs (String codePage, String string, boolean terminate) {
int length = string.length ();
char [] buffer = new char [length];
string.getChars (0, length, buffer, 0);
return wcsToMbcs (codePage, buffer, terminate);
}
public static byte [] wcsToMbcs (String codePage, char [] buffer, boolean terminate) {
long /*int*/ [] items_read = new long /*int*/ [1], items_written = new long /*int*/ [1];
/*
* Note that g_utf16_to_utf8() stops converting
* when it finds the first NULL.
*/
long /*int*/ ptr = OS.g_utf16_to_utf8 (buffer, buffer.length, items_read, items_written, null);
if (ptr == 0) return terminate ? NullByteArray : EmptyByteArray;
int written = (int)/*64*/items_written [0];
byte [] bytes = new byte [written + (terminate ? 1 : 0)];
OS.memmove (bytes, ptr, written);
OS.g_free (ptr);
return bytes;
}
}
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