| /******************************************************************************* |
| * 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); |
| } |
| } |
| |
| } |