bundles/org.eclipse.swt/Eclipse SWT/motif/org/eclipse/swt/internal/Converter.java - platform/eclipse.platform.swt - Git at Google

 /*******************************************************************************
  * Copyright (c) 2000, 2003 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Common Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/cpl-v10.html
  *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.swt.internal;


 import org.eclipse.swt.internal.motif.*;

 /**
  * 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>
  *
  * @deprecated
  */

 public final class Converter {

 	static final byte [] NULL_BYTE_ARRAY = new byte [1];
 	static final byte [] EMPTY_BYTE_ARRAY = new byte [0];
 	static final char [] EMPTY_CHAR_ARRAY = new char [0];

 	static String CodePage;
 	static byte[] Unicode;

 	static final Object LOCK = new Object ();

 	/* Converter cache */
 	static String LastMBToWCCodePage;
 	static String LastWCToMBCodePage;
 	static int LastWCToMB;
 	static int LastMBToWC;

 	/* Buffers cache */
 	static int BufferSize;
 	static int BufferTimes2;
 	static int BufferTimes4;

 	static {
 		if (OS.IsHPUX) {
 			Unicode = getAsciiBytes("ucs2");
 		} else {
 			Unicode = getAsciiBytes("UCS-2");
 		}

 		int length, item = OS.nl_langinfo (OS.CODESET);
 		if (item != 0 && (length = OS.strlen (item)) > 0) {
 			byte [] buffer = new byte [length];
 			OS.memmove (buffer, item, length);
 			CodePage = new String (buffer);
 			if (OS.IsSunOS) {
 				if (length > 3 && CodePage.indexOf ("ISO") == 0) {
 					CodePage = CodePage.substring (3, length);
 				}
 			}
 		} else {
 			if (OS.IsLinux) CodePage = "ISO-8859-1";
 			else if (OS.IsAIX) CodePage = "ISO8859-1";
 			else if (OS.IsSunOS) CodePage = "8859-1";
 			else CodePage = "iso8859_1";
 		}

 		BufferSize = 512;
 		BufferTimes2 = OS.XtMalloc (BufferSize * 2);
 		BufferTimes4 = OS.XtMalloc (BufferSize * 4);
 	}

 /**
  * Returns the default code page for the platform where the
  * application is currently running.
  *
  * @return the default code page
  */
 public static String defaultCodePage () {
 	return CodePage;
 }

 static byte[] getAsciiBytes (String str) {
 	int length = str.length ();
 	byte [] buffer = new byte [length + 1];
 	for (int i=0; i<length; i++) {
 		buffer [i] = (byte)str.charAt (i);
 	}
 	return buffer;
 }

 static String getAsciiString (byte [] buffer) {
 	int length = buffer.length;
 	char [] chars = new char [length];
 	for (int i=0; i<length; i++) {
 		chars [i] = (char)buffer [i];
 	}
 	return new String (chars);
 }

 /**
  * Converts an array of bytes representing the platform's encoding,
  * in the given code page, of some character data into an array of
  * matching unicode characters.
  *
  * @param codePage the code page to use for conversion
  * @param buffer the array of bytes to be converted
  * @return the unicode conversion
  */
 public static char [] mbcsToWcs (String codePage, byte [] buffer) {

 	/* Check for the simple cases */
 	if (buffer == null) {
 		return EMPTY_CHAR_ARRAY;
 	}
 	int length = buffer.length;
 	if (length == 0) {
 		return EMPTY_CHAR_ARRAY;
 	}

 	/*
 	 * Optimize for English ASCII encoding.  If no conversion is
 	 * performed, it is safe to return any object that will also not
 	 * be converted if this routine is called again with the result.
 	 * This ensures that double conversion will not be performed
 	 * on the same bytes.  Note that this relies on the fact that
 	 * lead bytes are never in the range 0..0x7F.
 	 */
 	char [] wideCharStr = new char [length];
 	for (int i=0; i<length; i++) {
 		if ((buffer [i] & 0xFF) <= 0x7F) {
 			wideCharStr [i] = (char) buffer [i]; // all bytes <= 0x7F, so no ((char) (buffer[i]&0xFF)) needed
 		} else {
 			synchronized (LOCK) {
 				String cp = codePage != null ? codePage : CodePage;
 				if (LastMBToWC != 0 && !cp.equals (LastMBToWCCodePage)) {
 					OS.iconv_close (LastMBToWC);
 					LastMBToWC = 0;
 				}
 				if (LastMBToWC == 0) {
 					LastMBToWCCodePage = cp;
 					LastMBToWC = OS.iconv_open (Unicode, getAsciiBytes (cp));
 					if (LastMBToWC == -1) LastMBToWC = 0;
 				}
 				int cd = LastMBToWC;
 				if (cd == 0) return EMPTY_CHAR_ARRAY;
 				int inBytes = length;
 				int outBytes = length * 2;
 				int ptr1, ptr2;
 				if (length <= BufferSize * 2) {
 					ptr1 = BufferTimes2;
 					ptr2 = BufferTimes4;
 				} else {
 					ptr1 = OS.XtMalloc (inBytes);
 					ptr2 = OS.XtMalloc (outBytes);
 				}
 				int [] inBuf = {ptr1};
 				int [] inBytesLeft = {inBytes};
 				int [] outBuf = {ptr2};
 				int [] outBytesLeft = {outBytes};
 				OS.memmove (ptr1, buffer, inBytes);
 				OS.iconv (cd, inBuf, inBytesLeft, outBuf, outBytesLeft);
 				outBytes = outBuf [0] - ptr2;
 				wideCharStr = new char [outBytes / 2];
 				OS.memmove (wideCharStr, ptr2, outBytes);
 				if (ptr1 != BufferTimes2) OS.XtFree (ptr1);
 				if (ptr2 != BufferTimes4) OS.XtFree (ptr2);
 			}
 			return wideCharStr;
 		}
 	}
 	return wideCharStr;
 }

 /**
  * Free any cached resources.
  */
 public static void release () {
 	synchronized (LOCK) {
 		if (BufferTimes2 != 0) OS.XtFree (BufferTimes2);
 		if (BufferTimes4 != 0) OS.XtFree (BufferTimes4);
 		if (LastWCToMB != 0) OS.iconv_close (LastWCToMB);
 		if (LastMBToWC != 0) OS.iconv_close (LastMBToWC);
 		LastMBToWC = LastWCToMB = BufferTimes4 = BufferTimes2 = 0;
 	}
 }

 /**
  * Converts an array of chars (containing unicode data) to an array
  * of bytes representing the platform's encoding, of those characters
  * in the given code page.
  *
  * @param codePage the code page to use for conversion
  * @param buffer the array of chars to be converted
  * @return the platform encoding
  */
 public static byte [] wcsToMbcs (String codePage, char [] buffer) {
 	return wcsToMbcs (codePage, buffer, false);
 }

 /**
  * Converts an array of chars (containing unicode data) to an array
  * of bytes representing the platform's encoding, of those characters
  * in the given code page. If the termination flag is true, the resulting
  * byte data will be null (zero) terminated.
  *
  * @param codePage the code page to use for conversion
  * @param buffer the array of chars to be converted
  * @param terminate <code>true</code> if the result should be null terminated and false otherwise.
  * @return the platform encoding
  */
 public static byte [] wcsToMbcs (String codePage, char [] buffer, boolean terminate) {

 	/* Check for the simple cases */
 	if (buffer == null) {
 		return (terminate) ? NULL_BYTE_ARRAY : EMPTY_BYTE_ARRAY;
 	}
 	int length = buffer.length;
 	if (length == 0) {
 		return (terminate) ? NULL_BYTE_ARRAY : EMPTY_BYTE_ARRAY;
 	}

 	/*
 	 * Optimize for English ASCII encoding.  This optimization
 	 * relies on the fact that lead bytes can never be in the
 	 * range 0..0x7F.
 	 */
 	byte [] mbcs = new byte [(terminate) ? length + 1 : length];
 	for (int i=0; i<length; i++) {
 		if ((buffer [i] & 0xFFFF) <= 0x7F) {
 			mbcs [i] = (byte) buffer [i];
 		} else {
 			synchronized (LOCK) {
 				String cp = codePage != null ? codePage : CodePage;
 				if (LastWCToMB != 0 && !cp.equals (LastWCToMBCodePage)) {
 					OS.iconv_close (LastWCToMB);
 					LastWCToMB = 0;
 				}
 				if (LastWCToMB == 0) {
 					LastWCToMBCodePage = cp;
 					LastWCToMB = OS.iconv_open (getAsciiBytes (cp), Unicode);
 					if (LastWCToMB == -1) LastWCToMB = 0;
 				}
 				int cd = LastWCToMB;
 				if (cd == 0) return (terminate) ? NULL_BYTE_ARRAY : EMPTY_BYTE_ARRAY;
 				int inBytes = length * 2;
 				int outBytes = length * 4;
 				int ptr1, ptr2;
 				if (length <= BufferSize) {
 					ptr1 = BufferTimes2;
 					ptr2 = BufferTimes4;
 				} else {
 					ptr1 = OS.XtMalloc (inBytes);
 					ptr2 = OS.XtMalloc (outBytes);
 				}
 				int [] inBuf = {ptr1};
 				int [] inBytesLeft = {inBytes};
 				int [] outBuf = {ptr2};
 				int [] outBytesLeft = {outBytes};
 				OS.memmove (ptr1, buffer, inBytes);
 				while (inBytesLeft [0] > 0) {
 					OS.iconv (cd, inBuf, inBytesLeft, outBuf, outBytesLeft);
 					if (inBytesLeft [0] != 0) {
 						inBuf [0] += 2;
 						inBytesLeft [0] -= 2;
 					}
 				}
 				outBytes = outBuf [0] - ptr2;
 				mbcs = new byte [terminate ? outBytes + 1 : outBytes];
 				OS.memmove (mbcs, ptr2, outBytes);
 				if (ptr1 != BufferTimes2) OS.XtFree (ptr1);
 				if (ptr2 != BufferTimes4) OS.XtFree (ptr2);
 			}
 			return mbcs;
 		}
 	}
 	return mbcs;
 }

 /**
  * Converts a String (containing unicode data) to an array
  * of bytes representing the platform's encoding, of those characters
  * in the given code page.
  *
  * @param codePage the code page to use for conversion
  * @param string the string to be converted
  * @return the platform encoding
  */
 public static byte [] wcsToMbcs (String codePage, String string) {
 	return wcsToMbcs (codePage, string, false);
 }

 /**
  * Converts a String (containing unicode data) to an array
  * of bytes representing the platform's encoding, of those characters
  * in the given code page. If the termination flag is true, the resulting
  * byte data will be null (zero) terminated.
  *
  * @param codePage the code page to use for conversion
  * @param string the string to be converted
  * @param terminate <code>true</code> if the result should be null terminated and false otherwise.
  * @return the platform encoding
  */
 public static byte [] wcsToMbcs (String codePage, String string, boolean terminate) {
 	if (terminate) {
 		if (string == null) return NULL_BYTE_ARRAY;
 		int count = string.length ();
 		char [] buffer = new char [count + 1];
 		string.getChars (0, count, buffer, 0);
 		return wcsToMbcs (codePage, buffer, false);
 	} else {
 		if (string == null) return EMPTY_BYTE_ARRAY;
 		int count = string.length ();
 		char [] buffer = new char [count];
 		string.getChars (0, count, buffer, 0);
 		return wcsToMbcs (codePage, buffer, false);
 	}
 }

 }
	/*******************************************************************************
	* Copyright (c) 2000, 2003 IBM Corporation and others.
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Common Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/cpl-v10.html
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	*******************************************************************************/
	package org.eclipse.swt.internal;


	import org.eclipse.swt.internal.motif.*;

	/**
	* 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>
	*
	* @deprecated
	*/

	public final class Converter {

	static final byte [] NULL_BYTE_ARRAY = new byte [1];
	static final byte [] EMPTY_BYTE_ARRAY = new byte [0];
	static final char [] EMPTY_CHAR_ARRAY = new char [0];

	static String CodePage;
	static byte[] Unicode;

	static final Object LOCK = new Object ();

	/* Converter cache */
	static String LastMBToWCCodePage;
	static String LastWCToMBCodePage;
	static int LastWCToMB;
	static int LastMBToWC;

	/* Buffers cache */
	static int BufferSize;
	static int BufferTimes2;
	static int BufferTimes4;

	static {
	if (OS.IsHPUX) {
	Unicode = getAsciiBytes("ucs2");
	} else {
	Unicode = getAsciiBytes("UCS-2");
	}

	int length, item = OS.nl_langinfo (OS.CODESET);
	if (item != 0 && (length = OS.strlen (item)) > 0) {
	byte [] buffer = new byte [length];
	OS.memmove (buffer, item, length);
	CodePage = new String (buffer);
	if (OS.IsSunOS) {
	if (length > 3 && CodePage.indexOf ("ISO") == 0) {
	CodePage = CodePage.substring (3, length);
	}
	}
	} else {
	if (OS.IsLinux) CodePage = "ISO-8859-1";
	else if (OS.IsAIX) CodePage = "ISO8859-1";
	else if (OS.IsSunOS) CodePage = "8859-1";
	else CodePage = "iso8859_1";
	}

	BufferSize = 512;
	BufferTimes2 = OS.XtMalloc (BufferSize * 2);
	BufferTimes4 = OS.XtMalloc (BufferSize * 4);
	}

	/**
	* Returns the default code page for the platform where the
	* application is currently running.
	*
	* @return the default code page
	*/
	public static String defaultCodePage () {
	return CodePage;
	}

	static byte[] getAsciiBytes (String str) {
	int length = str.length ();
	byte [] buffer = new byte [length + 1];
	for (int i=0; i<length; i++) {
	buffer [i] = (byte)str.charAt (i);
	}
	return buffer;
	}

	static String getAsciiString (byte [] buffer) {
	int length = buffer.length;
	char [] chars = new char [length];
	for (int i=0; i<length; i++) {
	chars [i] = (char)buffer [i];
	}
	return new String (chars);
	}

	/**
	* Converts an array of bytes representing the platform's encoding,
	* in the given code page, of some character data into an array of
	* matching unicode characters.
	*
	* @param codePage the code page to use for conversion
	* @param buffer the array of bytes to be converted
	* @return the unicode conversion
	*/
	public static char [] mbcsToWcs (String codePage, byte [] buffer) {

	/* Check for the simple cases */
	if (buffer == null) {
	return EMPTY_CHAR_ARRAY;
	}
	int length = buffer.length;
	if (length == 0) {
	return EMPTY_CHAR_ARRAY;
	}

	/*
	* Optimize for English ASCII encoding. If no conversion is
	* performed, it is safe to return any object that will also not
	* be converted if this routine is called again with the result.
	* This ensures that double conversion will not be performed
	* on the same bytes. Note that this relies on the fact that
	* lead bytes are never in the range 0..0x7F.
	*/
	char [] wideCharStr = new char [length];
	for (int i=0; i<length; i++) {
	if ((buffer [i] & 0xFF) <= 0x7F) {
	wideCharStr [i] = (char) buffer [i]; // all bytes <= 0x7F, so no ((char) (buffer[i]&0xFF)) needed
	} else {
	synchronized (LOCK) {
	String cp = codePage != null ? codePage : CodePage;
	if (LastMBToWC != 0 && !cp.equals (LastMBToWCCodePage)) {
	OS.iconv_close (LastMBToWC);
	LastMBToWC = 0;
	}
	if (LastMBToWC == 0) {
	LastMBToWCCodePage = cp;
	LastMBToWC = OS.iconv_open (Unicode, getAsciiBytes (cp));
	if (LastMBToWC == -1) LastMBToWC = 0;
	}
	int cd = LastMBToWC;
	if (cd == 0) return EMPTY_CHAR_ARRAY;
	int inBytes = length;
	int outBytes = length * 2;
	int ptr1, ptr2;
	if (length <= BufferSize * 2) {
	ptr1 = BufferTimes2;
	ptr2 = BufferTimes4;
	} else {
	ptr1 = OS.XtMalloc (inBytes);
	ptr2 = OS.XtMalloc (outBytes);
	}
	int [] inBuf = {ptr1};
	int [] inBytesLeft = {inBytes};
	int [] outBuf = {ptr2};
	int [] outBytesLeft = {outBytes};
	OS.memmove (ptr1, buffer, inBytes);
	OS.iconv (cd, inBuf, inBytesLeft, outBuf, outBytesLeft);
	outBytes = outBuf [0] - ptr2;
	wideCharStr = new char [outBytes / 2];
	OS.memmove (wideCharStr, ptr2, outBytes);
	if (ptr1 != BufferTimes2) OS.XtFree (ptr1);
	if (ptr2 != BufferTimes4) OS.XtFree (ptr2);
	}
	return wideCharStr;
	}
	}
	return wideCharStr;
	}

	/**
	* Free any cached resources.
	*/
	public static void release () {
	synchronized (LOCK) {
	if (BufferTimes2 != 0) OS.XtFree (BufferTimes2);
	if (BufferTimes4 != 0) OS.XtFree (BufferTimes4);
	if (LastWCToMB != 0) OS.iconv_close (LastWCToMB);
	if (LastMBToWC != 0) OS.iconv_close (LastMBToWC);
	LastMBToWC = LastWCToMB = BufferTimes4 = BufferTimes2 = 0;
	}
	}

	/**
	* Converts an array of chars (containing unicode data) to an array
	* of bytes representing the platform's encoding, of those characters
	* in the given code page.
	*
	* @param codePage the code page to use for conversion
	* @param buffer the array of chars to be converted
	* @return the platform encoding
	*/
	public static byte [] wcsToMbcs (String codePage, char [] buffer) {
	return wcsToMbcs (codePage, buffer, false);
	}

	/**
	* Converts an array of chars (containing unicode data) to an array
	* of bytes representing the platform's encoding, of those characters
	* in the given code page. If the termination flag is true, the resulting
	* byte data will be null (zero) terminated.
	*
	* @param codePage the code page to use for conversion
	* @param buffer the array of chars to be converted
	* @param terminate <code>true</code> if the result should be null terminated and false otherwise.
	* @return the platform encoding
	*/
	public static byte [] wcsToMbcs (String codePage, char [] buffer, boolean terminate) {

	/* Check for the simple cases */
	if (buffer == null) {
	return (terminate) ? NULL_BYTE_ARRAY : EMPTY_BYTE_ARRAY;
	}
	int length = buffer.length;
	if (length == 0) {
	return (terminate) ? NULL_BYTE_ARRAY : EMPTY_BYTE_ARRAY;
	}

	/*
	* Optimize for English ASCII encoding. This optimization
	* relies on the fact that lead bytes can never be in the
	* range 0..0x7F.
	*/
	byte [] mbcs = new byte [(terminate) ? length + 1 : length];
	for (int i=0; i<length; i++) {
	if ((buffer [i] & 0xFFFF) <= 0x7F) {
	mbcs [i] = (byte) buffer [i];
	} else {
	synchronized (LOCK) {
	String cp = codePage != null ? codePage : CodePage;
	if (LastWCToMB != 0 && !cp.equals (LastWCToMBCodePage)) {
	OS.iconv_close (LastWCToMB);
	LastWCToMB = 0;
	}
	if (LastWCToMB == 0) {
	LastWCToMBCodePage = cp;
	LastWCToMB = OS.iconv_open (getAsciiBytes (cp), Unicode);
	if (LastWCToMB == -1) LastWCToMB = 0;
	}
	int cd = LastWCToMB;
	if (cd == 0) return (terminate) ? NULL_BYTE_ARRAY : EMPTY_BYTE_ARRAY;
	int inBytes = length * 2;
	int outBytes = length * 4;
	int ptr1, ptr2;
	if (length <= BufferSize) {
	ptr1 = BufferTimes2;
	ptr2 = BufferTimes4;
	} else {
	ptr1 = OS.XtMalloc (inBytes);
	ptr2 = OS.XtMalloc (outBytes);
	}
	int [] inBuf = {ptr1};
	int [] inBytesLeft = {inBytes};
	int [] outBuf = {ptr2};
	int [] outBytesLeft = {outBytes};
	OS.memmove (ptr1, buffer, inBytes);
	while (inBytesLeft [0] > 0) {
	OS.iconv (cd, inBuf, inBytesLeft, outBuf, outBytesLeft);
	if (inBytesLeft [0] != 0) {
	inBuf [0] += 2;
	inBytesLeft [0] -= 2;
	}
	}
	outBytes = outBuf [0] - ptr2;
	mbcs = new byte [terminate ? outBytes + 1 : outBytes];
	OS.memmove (mbcs, ptr2, outBytes);
	if (ptr1 != BufferTimes2) OS.XtFree (ptr1);
	if (ptr2 != BufferTimes4) OS.XtFree (ptr2);
	}
	return mbcs;
	}
	}
	return mbcs;
	}

	/**
	* Converts a String (containing unicode data) to an array
	* of bytes representing the platform's encoding, of those characters
	* in the given code page.
	*
	* @param codePage the code page to use for conversion
	* @param string the string to be converted
	* @return the platform encoding
	*/
	public static byte [] wcsToMbcs (String codePage, String string) {
	return wcsToMbcs (codePage, string, false);
	}

	/**
	* Converts a String (containing unicode data) to an array
	* of bytes representing the platform's encoding, of those characters
	* in the given code page. If the termination flag is true, the resulting
	* byte data will be null (zero) terminated.
	*
	* @param codePage the code page to use for conversion
	* @param string the string to be converted
	* @param terminate <code>true</code> if the result should be null terminated and false otherwise.
	* @return the platform encoding
	*/
	public static byte [] wcsToMbcs (String codePage, String string, boolean terminate) {
	if (terminate) {
	if (string == null) return NULL_BYTE_ARRAY;
	int count = string.length ();
	char [] buffer = new char [count + 1];
	string.getChars (0, count, buffer, 0);
	return wcsToMbcs (codePage, buffer, false);
	} else {
	if (string == null) return EMPTY_BYTE_ARRAY;
	int count = string.length ();
	char [] buffer = new char [count];
	string.getChars (0, count, buffer, 0);
	return wcsToMbcs (codePage, buffer, false);
	}
	}

	}