From 13d6dc3a6a5e8bd3c17997351a0e6f087eb301a2 Mon Sep 17 00:00:00 2001 From: tknall Date: Tue, 25 Nov 2008 12:04:30 +0000 Subject: Removing itext from source. git-svn-id: https://joinup.ec.europa.eu/svn/pdf-as/trunk@302 7b5415b0-85f9-ee4d-85bd-d5d0c3b42d1c --- src/main/java/com/lowagie/text/pdf/LZWDecoder.java | 231 --------------------- 1 file changed, 231 deletions(-) delete mode 100644 src/main/java/com/lowagie/text/pdf/LZWDecoder.java (limited to 'src/main/java/com/lowagie/text/pdf/LZWDecoder.java') diff --git a/src/main/java/com/lowagie/text/pdf/LZWDecoder.java b/src/main/java/com/lowagie/text/pdf/LZWDecoder.java deleted file mode 100644 index b8bedcf..0000000 --- a/src/main/java/com/lowagie/text/pdf/LZWDecoder.java +++ /dev/null @@ -1,231 +0,0 @@ -/* - * Copyright (c) 2001 Sun Microsystems, Inc. All Rights Reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are met: - * - * -Redistributions of source code must retain the above copyright notice, this - * list of conditions and the following disclaimer. - * - * -Redistribution in binary form must reproduct the above copyright notice, - * this list of conditions and the following disclaimer in the documentation - * and/or other materials provided with the distribution. - * - * Neither the name of Sun Microsystems, Inc. or the names of contributors may - * be used to endorse or promote products derived from this software without - * specific prior written permission. - * - * This software is provided "AS IS," without a warranty of any kind. ALL - * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY - * IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR - * NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE - * LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING - * OR DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS - * LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, - * INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER - * CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF - * OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGES. - * - * You acknowledge that Software is not designed,licensed or intended for use in - * the design, construction, operation or maintenance of any nuclear facility. - * - * Adapted from the JAI codecs TIFFLZWDecoder. - */ -package com.lowagie.text.pdf; -import java.io.OutputStream; -import java.io.IOException; -import com.lowagie.text.ExceptionConverter; -/** - * A class for performing LZW decoding. - * - * - */ -public class LZWDecoder { - - byte stringTable[][]; - byte data[] = null; - OutputStream uncompData; - int tableIndex, bitsToGet = 9; - int bytePointer, bitPointer; - int nextData = 0; - int nextBits = 0; - - int andTable[] = { - 511, - 1023, - 2047, - 4095 - }; - - public LZWDecoder() { - } - - /** - * Method to decode LZW compressed data. - * - * @param data The compressed data. - * @param uncompData Array to return the uncompressed data in. - */ - public void decode(byte data[], OutputStream uncompData) { - - if(data[0] == (byte)0x00 && data[1] == (byte)0x01) { - throw new RuntimeException("LZW flavour not supported."); - } - - initializeStringTable(); - - this.data = data; - this.uncompData = uncompData; - - // Initialize pointers - bytePointer = 0; - bitPointer = 0; - - nextData = 0; - nextBits = 0; - - int code, oldCode = 0; - byte string[]; - - while ((code = getNextCode()) != 257) { - - if (code == 256) { - - initializeStringTable(); - code = getNextCode(); - - if (code == 257) { - break; - } - - writeString(stringTable[code]); - oldCode = code; - - } else { - - if (code < tableIndex) { - - string = stringTable[code]; - - writeString(string); - addStringToTable(stringTable[oldCode], string[0]); - oldCode = code; - - } else { - - string = stringTable[oldCode]; - string = composeString(string, string[0]); - writeString(string); - addStringToTable(string); - oldCode = code; - } - } - } - } - - - /** - * Initialize the string table. - */ - public void initializeStringTable() { - - stringTable = new byte[8192][]; - - for (int i=0; i<256; i++) { - stringTable[i] = new byte[1]; - stringTable[i][0] = (byte)i; - } - - tableIndex = 258; - bitsToGet = 9; - } - - /** - * Write out the string just uncompressed. - */ - public void writeString(byte string[]) { - try { - uncompData.write(string); - } - catch (IOException e) { - throw new ExceptionConverter(e); - } - } - - /** - * Add a new string to the string table. - */ - public void addStringToTable(byte oldString[], byte newString) { - int length = oldString.length; - byte string[] = new byte[length + 1]; - System.arraycopy(oldString, 0, string, 0, length); - string[length] = newString; - - // Add this new String to the table - stringTable[tableIndex++] = string; - - if (tableIndex == 511) { - bitsToGet = 10; - } else if (tableIndex == 1023) { - bitsToGet = 11; - } else if (tableIndex == 2047) { - bitsToGet = 12; - } - } - - /** - * Add a new string to the string table. - */ - public void addStringToTable(byte string[]) { - - // Add this new String to the table - stringTable[tableIndex++] = string; - - if (tableIndex == 511) { - bitsToGet = 10; - } else if (tableIndex == 1023) { - bitsToGet = 11; - } else if (tableIndex == 2047) { - bitsToGet = 12; - } - } - - /** - * Append newString to the end of oldString. - */ - public byte[] composeString(byte oldString[], byte newString) { - int length = oldString.length; - byte string[] = new byte[length + 1]; - System.arraycopy(oldString, 0, string, 0, length); - string[length] = newString; - - return string; - } - - // Returns the next 9, 10, 11 or 12 bits - public int getNextCode() { - // Attempt to get the next code. The exception is caught to make - // this robust to cases wherein the EndOfInformation code has been - // omitted from a strip. Examples of such cases have been observed - // in practice. - try { - nextData = (nextData << 8) | (data[bytePointer++] & 0xff); - nextBits += 8; - - if (nextBits < bitsToGet) { - nextData = (nextData << 8) | (data[bytePointer++] & 0xff); - nextBits += 8; - } - - int code = - (nextData >> (nextBits - bitsToGet)) & andTable[bitsToGet-9]; - nextBits -= bitsToGet; - - return code; - } catch(ArrayIndexOutOfBoundsException e) { - // Strip not terminated as expected: return EndOfInformation code. - return 257; - } - } -} -- cgit v1.2.3