jeremias 2003/07/04 13:01:08 Added: src/java/org/apache/fop/util ASCII85OutputStream.java RunLengthEncodeOutputStream.java Finalizable.java FlateEncodeOutputStream.java ASCIIHexOutputStream.java ASCII85Constants.java ASCII85InputStream.java Log: Move here from org.apache.fop.render.ps Revision Changes Path 1.1 xml-fop/src/java/org/apache/fop/util/ASCII85OutputStream.java Index: ASCII85OutputStream.java =================================================================== /* * $Id: ASCII85OutputStream.java,v 1.1 2003/07/04 20:01:07 jeremias Exp $ * ============================================================================ * The Apache Software License, Version 1.1 * ============================================================================ * * Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved. * * Redistribution and use in source and binary forms, with or without modifica- * tion, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * 3. The end-user documentation included with the redistribution, if any, must * include the following acknowledgment: "This product includes software * developed by the Apache Software Foundation (http://www.apache.org/)." * Alternately, this acknowledgment may appear in the software itself, if * and wherever such third-party acknowledgments normally appear. * * 4. The names "FOP" and "Apache Software Foundation" must not be used to * endorse or promote products derived from this software without prior * written permission. For written permission, please contact * [EMAIL PROTECTED] * * 5. Products derived from this software may not be called "Apache", nor may * "Apache" appear in their name, without prior written permission of the * Apache Software Foundation. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU- * DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * ============================================================================ * * This software consists of voluntary contributions made by many individuals * on behalf of the Apache Software Foundation and was originally created by * James Tauber <[EMAIL PROTECTED]>. For more information on the Apache * Software Foundation, please see <http://www.apache.org/>. */ package org.apache.fop.util; import java.io.OutputStream; import java.io.FilterOutputStream; import java.io.IOException; /** * This class applies a ASCII85 encoding to the stream. * * @author <a href="mailto:[EMAIL PROTECTED]">Jeremias Maerki</a> * @version $Id: ASCII85OutputStream.java,v 1.1 2003/07/04 20:01:07 jeremias Exp $ */ public class ASCII85OutputStream extends FilterOutputStream implements ASCII85Constants, Finalizable { private static final boolean DEBUG = false; private int pos = 0; private long buffer = 0; private int posinline = 0; private int bw = 0; /** @see java.io.FilterOutputStream **/ public ASCII85OutputStream(OutputStream out) { super(out); } /** @see java.io.FilterOutputStream **/ public void write(int b) throws IOException { if (pos == 0) { buffer += (b << 24) & 0xff000000L; } else if (pos == 1) { buffer += (b << 16) & 0xff0000L; } else if (pos == 2) { buffer += (b << 8) & 0xff00L; } else { buffer += b & 0xffL; } pos++; if (pos > 3) { checkedWrite(convertWord(buffer)); buffer = 0; pos = 0; } } /* UNUSED ATM private void checkedWrite(int b) throws IOException { if (posinline == 80) { out.write(EOL); bw++; posinline = 0; } checkedWrite(b); posinline++; bw++; }*/ private void checkedWrite(byte[] buf) throws IOException { checkedWrite(buf, buf.length, false); } private void checkedWrite(byte[] buf, boolean nosplit) throws IOException { checkedWrite(buf, buf.length, nosplit); } private void checkedWrite(byte[] buf , int len) throws IOException { checkedWrite(buf, len, false); } private void checkedWrite(byte[] buf , int len, boolean nosplit) throws IOException { if (posinline + len > 80) { int firstpart = (nosplit ? 0 : len - (posinline + len - 80)); if (firstpart > 0) { out.write(buf, 0, firstpart); } out.write(EOL); bw++; int rest = len - firstpart; if (rest > 0) { out.write(buf, firstpart, rest); } posinline = rest; } else { out.write(buf, 0, len); posinline += len; } bw += len; } /** * This converts a 32 bit value (4 bytes) into 5 bytes using base 85. * each byte in the result starts with zero at the '!' character so * the resulting base85 number fits into printable ascii chars * * @param word the 32 bit unsigned (hence the long datatype) word * @return 5 bytes (or a single byte of the 'z' character for word * values of 0) */ private byte[] convertWord(long word) { word = word & 0xffffffff; if (word == 0) { return ZERO_ARRAY; } else { if (word < 0) { word = -word; } byte c1 = (byte)((word / POW85[0]) & 0xFF); byte c2 = (byte)(((word - (c1 * POW85[0])) / POW85[1]) & 0xFF); byte c3 = (byte)(((word - (c1 * POW85[0]) - (c2 * POW85[1])) / POW85[2]) & 0xFF); byte c4 = (byte)(((word - (c1 * POW85[0]) - (c2 * POW85[1]) - (c3 * POW85[2])) / POW85[3]) & 0xFF); byte c5 = (byte)(((word - (c1 * POW85[0]) - (c2 * POW85[1]) - (c3 * POW85[2]) - (c4 * POW85[3]))) & 0xFF); byte[] ret = { (byte)(c1 + START), (byte)(c2 + START), (byte)(c3 + START), (byte)(c4 + START), (byte)(c5 + START) }; if (DEBUG) { for (int i = 0; i < ret.length; i++) { if (ret[i] < 33 || ret[i] > 117) { System.out.println("Illegal char value " + new Integer(ret[i])); } } } return ret; } } /** @see org.apache.fop.render.ps.Finalizable **/ public void finalizeStream() throws IOException { // now take care of the trailing few bytes. // with n leftover bytes, we append 0 bytes to make a full group of 4 // then convert like normal (except not applying the special zero rule) // and write out the first n+1 bytes from the result if (pos > 0) { int rest = pos; /* byte[] lastdata = new byte[4]; int i = 0; for (int j = 0; j < 4; j++) { if (j < rest) { lastdata[j] = data[i++]; } else { lastdata[j] = 0; } } long val = ((lastdata[0] << 24) & 0xff000000L) + ((lastdata[1] << 16) & 0xff0000L) + ((lastdata[2] << 8) & 0xff00L) + (lastdata[3] & 0xffL); */ byte[] conv; // special rule for handling zeros at the end if (buffer != 0) { conv = convertWord(buffer); } else { conv = new byte[5]; for (int j = 0; j < 5; j++) { conv[j] = (byte)'!'; } } // assert rest+1 <= 5 checkedWrite(conv, rest + 1); } // finally write the two character end of data marker checkedWrite(EOD, true); flush(); if (out instanceof Finalizable) { ((Finalizable)out).finalizeStream(); } } /** @see java.io.FilterOutputStream **/ public void close() throws IOException { finalizeStream(); super.close(); } } 1.1 xml-fop/src/java/org/apache/fop/util/RunLengthEncodeOutputStream.java Index: RunLengthEncodeOutputStream.java =================================================================== /* * $Id: RunLengthEncodeOutputStream.java,v 1.1 2003/07/04 20:01:07 jeremias Exp $ * ============================================================================ * The Apache Software License, Version 1.1 * ============================================================================ * * Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved. * * Redistribution and use in source and binary forms, with or without modifica- * tion, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * 3. The end-user documentation included with the redistribution, if any, must * include the following acknowledgment: "This product includes software * developed by the Apache Software Foundation (http://www.apache.org/)." * Alternately, this acknowledgment may appear in the software itself, if * and wherever such third-party acknowledgments normally appear. * * 4. The names "FOP" and "Apache Software Foundation" must not be used to * endorse or promote products derived from this software without prior * written permission. For written permission, please contact * [EMAIL PROTECTED] * * 5. Products derived from this software may not be called "Apache", nor may * "Apache" appear in their name, without prior written permission of the * Apache Software Foundation. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU- * DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * ============================================================================ * * This software consists of voluntary contributions made by many individuals * on behalf of the Apache Software Foundation and was originally created by * James Tauber <[EMAIL PROTECTED]>. For more information on the Apache * Software Foundation, please see <http://www.apache.org/>. */ package org.apache.fop.util; import java.io.FilterOutputStream; import java.io.OutputStream; import java.io.IOException; /** * This class applies a RunLengthEncode filter to the stream. * * @author <a href="mailto:[EMAIL PROTECTED]">Stephen Wolke</a> * @version $Id: RunLengthEncodeOutputStream.java,v 1.1 2003/07/04 20:01:07 jeremias Exp $ */ public class RunLengthEncodeOutputStream extends FilterOutputStream implements Finalizable { private static final int MAX_SEQUENCE_COUNT = 127; private static final int END_OF_DATA = 128; private static final int BYTE_MAX = 256; private static final int NOT_IDENTIFY_SEQUENCE = 0; private static final int START_SEQUENCE = 1; private static final int IN_SEQUENCE = 2; private static final int NOT_IN_SEQUENCE = 3; private int runCount = 0; private int isSequence = NOT_IDENTIFY_SEQUENCE; private byte[] runBuffer = new byte[MAX_SEQUENCE_COUNT + 1]; /** @see java.io.FilterOutputStream **/ public RunLengthEncodeOutputStream(OutputStream out) { super(out); } /** @see java.io.FilterOutputStream **/ public void write(byte b) throws java.io.IOException { runBuffer[runCount] = b; switch (runCount) { case 0: runCount = 0; isSequence = NOT_IDENTIFY_SEQUENCE; runCount++; break; case 1: if (runBuffer[runCount] != runBuffer[runCount - 1]) { isSequence = NOT_IN_SEQUENCE; } runCount++; break; case 2: if (runBuffer[runCount] != runBuffer[runCount - 1]) { isSequence = NOT_IN_SEQUENCE; } else { if (isSequence == NOT_IN_SEQUENCE) { isSequence = START_SEQUENCE; } else { isSequence = IN_SEQUENCE; } } runCount++; break; case MAX_SEQUENCE_COUNT: if (isSequence == IN_SEQUENCE) { out.write(BYTE_MAX - (MAX_SEQUENCE_COUNT - 1)); out.write(runBuffer[runCount - 1]); runBuffer[0] = runBuffer[runCount]; runCount = 1; } else { out.write(MAX_SEQUENCE_COUNT); out.write(runBuffer, 0, runCount + 1); runCount = 0; } isSequence = NOT_IDENTIFY_SEQUENCE; break; default: switch (isSequence) { case IN_SEQUENCE: if (runBuffer[runCount] != runBuffer[runCount - 1]) { out.write(BYTE_MAX - (runCount - 1)); out.write(runBuffer[runCount - 1]); runBuffer[0] = runBuffer[runCount]; runCount = 1; isSequence = NOT_IDENTIFY_SEQUENCE; break; } runCount++; break; case NOT_IN_SEQUENCE: if (runBuffer[runCount] == runBuffer[runCount - 1]) { isSequence = START_SEQUENCE; } runCount++; break; case START_SEQUENCE: if (runBuffer[runCount] == runBuffer[runCount - 1]) { out.write(runCount - 3); out.write(runBuffer, 0, runCount - 2); runBuffer[0] = runBuffer[runCount]; runBuffer[1] = runBuffer[runCount]; runBuffer[2] = runBuffer[runCount]; runCount = 3; isSequence = IN_SEQUENCE; break; } else { isSequence = NOT_IN_SEQUENCE; runCount++; break; } } } } /** @see java.io.FilterOutputStream **/ public void write(byte[] b) throws IOException { for (int i = 0; i < b.length; i++) { this.write(b[i]); } } /** @see java.io.FilterOutputStream **/ public void write(byte[] b, int off, int len) throws IOException { for (int i = 0; i < len; i++) { this.write(b[off + i]); } } /** @see org.apache.fop.render.ps.Finalizable **/ public void finalizeStream() throws IOException { switch (isSequence) { case IN_SEQUENCE: out.write(BYTE_MAX - (runCount - 1)); out.write(runBuffer[runCount - 1]); break; default: out.write(runCount - 1); out.write(runBuffer, 0, runCount); } out.write(END_OF_DATA); flush(); if (out instanceof Finalizable) { ((Finalizable) out).finalizeStream(); } } /** @see java.io.FilterOutputStream **/ public void close() throws IOException { finalizeStream(); super.close(); } } 1.1 xml-fop/src/java/org/apache/fop/util/Finalizable.java Index: Finalizable.java =================================================================== /* * $Id: Finalizable.java,v 1.1 2003/07/04 20:01:07 jeremias Exp $ * ============================================================================ * The Apache Software License, Version 1.1 * ============================================================================ * * Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved. * * Redistribution and use in source and binary forms, with or without modifica- * tion, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * 3. The end-user documentation included with the redistribution, if any, must * include the following acknowledgment: "This product includes software * developed by the Apache Software Foundation (http://www.apache.org/)." * Alternately, this acknowledgment may appear in the software itself, if * and wherever such third-party acknowledgments normally appear. * * 4. The names "FOP" and "Apache Software Foundation" must not be used to * endorse or promote products derived from this software without prior * written permission. For written permission, please contact * [EMAIL PROTECTED] * * 5. Products derived from this software may not be called "Apache", nor may * "Apache" appear in their name, without prior written permission of the * Apache Software Foundation. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU- * DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * ============================================================================ * * This software consists of voluntary contributions made by many individuals * on behalf of the Apache Software Foundation and was originally created by * James Tauber <[EMAIL PROTECTED]>. For more information on the Apache * Software Foundation, please see <http://www.apache.org/>. */ package org.apache.fop.util; /** * This interface is used for special FilteredOutputStream classes that won't * be closed (since this causes the target OutputStream to be closed, too) but * where flush() is not enough, for example because a final marker has to be * written to the target stream. * * @author <a href="mailto:[EMAIL PROTECTED]">Jeremias Maerki</a> * @version $Id: Finalizable.java,v 1.1 2003/07/04 20:01:07 jeremias Exp $ */ public interface Finalizable { /** * This method can be called instead of close() on a subclass of * FilteredOutputStream when a final marker has to be written to the target * stream, but close() cannot be called. * * @exception java.io.IOException In case of an IO problem */ void finalizeStream() throws java.io.IOException; } 1.1 xml-fop/src/java/org/apache/fop/util/FlateEncodeOutputStream.java Index: FlateEncodeOutputStream.java =================================================================== /* * $Id: FlateEncodeOutputStream.java,v 1.1 2003/07/04 20:01:07 jeremias Exp $ * ============================================================================ * The Apache Software License, Version 1.1 * ============================================================================ * * Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved. * * Redistribution and use in source and binary forms, with or without modifica- * tion, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * 3. The end-user documentation included with the redistribution, if any, must * include the following acknowledgment: "This product includes software * developed by the Apache Software Foundation (http://www.apache.org/)." * Alternately, this acknowledgment may appear in the software itself, if * and wherever such third-party acknowledgments normally appear. * * 4. The names "FOP" and "Apache Software Foundation" must not be used to * endorse or promote products derived from this software without prior * written permission. For written permission, please contact * [EMAIL PROTECTED] * * 5. Products derived from this software may not be called "Apache", nor may * "Apache" appear in their name, without prior written permission of the * Apache Software Foundation. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU- * DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * ============================================================================ * * This software consists of voluntary contributions made by many individuals * on behalf of the Apache Software Foundation and was originally created by * James Tauber <[EMAIL PROTECTED]>. For more information on the Apache * Software Foundation, please see <http://www.apache.org/>. */ package org.apache.fop.util; import java.io.OutputStream; import java.io.IOException; /** * This class applies a FlateEncode filter to the stream. It is basically the * normal DeflaterOutputStream except now also implementing the Finalizable * interface. * * @author <a href="mailto:[EMAIL PROTECTED]">Jeremias Maerki</a> * @version $Id: FlateEncodeOutputStream.java,v 1.1 2003/07/04 20:01:07 jeremias Exp $ */ public class FlateEncodeOutputStream extends java.util.zip.DeflaterOutputStream implements Finalizable { /** @see java.util.zip.DeflaterOutputStream **/ public FlateEncodeOutputStream(OutputStream out) { super(out); } /** @see org.apache.fop.render.ps.Finalizable **/ public void finalizeStream() throws IOException { finish(); flush(); if (out instanceof Finalizable) { ((Finalizable)out).finalizeStream(); } } } 1.1 xml-fop/src/java/org/apache/fop/util/ASCIIHexOutputStream.java Index: ASCIIHexOutputStream.java =================================================================== /* * $Id: ASCIIHexOutputStream.java,v 1.1 2003/07/04 20:01:07 jeremias Exp $ * ============================================================================ * The Apache Software License, Version 1.1 * ============================================================================ * * Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved. * * Redistribution and use in source and binary forms, with or without modifica- * tion, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * 3. The end-user documentation included with the redistribution, if any, must * include the following acknowledgment: "This product includes software * developed by the Apache Software Foundation (http://www.apache.org/)." * Alternately, this acknowledgment may appear in the software itself, if * and wherever such third-party acknowledgments normally appear. * * 4. The names "FOP" and "Apache Software Foundation" must not be used to * endorse or promote products derived from this software without prior * written permission. For written permission, please contact * [EMAIL PROTECTED] * * 5. Products derived from this software may not be called "Apache", nor may * "Apache" appear in their name, without prior written permission of the * Apache Software Foundation. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU- * DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * ============================================================================ * * This software consists of voluntary contributions made by many individuals * on behalf of the Apache Software Foundation and was originally created by * James Tauber <[EMAIL PROTECTED]>. For more information on the Apache * Software Foundation, please see <http://www.apache.org/>. */ package org.apache.fop.util; import java.io.OutputStream; import java.io.FilterOutputStream; import java.io.IOException; /** * This class applies a ASCII Hex encoding to the stream. * * @author <a href="mailto:[EMAIL PROTECTED]">Jeremias Maerki</a> * @version $Id: ASCIIHexOutputStream.java,v 1.1 2003/07/04 20:01:07 jeremias Exp $ */ public class ASCIIHexOutputStream extends FilterOutputStream implements Finalizable { private static final int EOL = 0x0A; //"\n" private static final int EOD = 0x3E; //">" private static final int ZERO = 0x30; //"0" private static final int NINE = 0x39; //"9" private static final int A = 0x41; //"A" private static final int ADIFF = A - NINE - 1; private int posinline = 0; /** @see java.io.FilterOutputStream **/ public ASCIIHexOutputStream(OutputStream out) { super(out); } /** @see java.io.FilterOutputStream **/ public void write(int b) throws IOException { b &= 0xFF; int digit1 = ((b & 0xF0) >> 4) + ZERO; if (digit1 > NINE) { digit1 += ADIFF; } out.write(digit1); int digit2 = (b & 0x0F) + ZERO; if (digit2 > NINE) { digit2 += ADIFF; } out.write(digit2); posinline++; checkLineWrap(); } private void checkLineWrap() throws IOException { //Maximum line length is 80 characters if (posinline >= 40) { out.write(EOL); posinline = 0; } } /** @see org.apache.fop.render.ps.Finalizable **/ public void finalizeStream() throws IOException { checkLineWrap(); //Write closing character ">" super.write(EOD); flush(); if (out instanceof Finalizable) { ((Finalizable) out).finalizeStream(); } } /** @see java.io.FilterOutputStream **/ public void close() throws IOException { finalizeStream(); super.close(); } } 1.1 xml-fop/src/java/org/apache/fop/util/ASCII85Constants.java Index: ASCII85Constants.java =================================================================== /* * $Id: ASCII85Constants.java,v 1.1 2003/07/04 20:01:07 jeremias Exp $ * ============================================================================ * The Apache Software License, Version 1.1 * ============================================================================ * * Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved. * * Redistribution and use in source and binary forms, with or without modifica- * tion, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * 3. The end-user documentation included with the redistribution, if any, must * include the following acknowledgment: "This product includes software * developed by the Apache Software Foundation (http://www.apache.org/)." * Alternately, this acknowledgment may appear in the software itself, if * and wherever such third-party acknowledgments normally appear. * * 4. The names "FOP" and "Apache Software Foundation" must not be used to * endorse or promote products derived from this software without prior * written permission. For written permission, please contact * [EMAIL PROTECTED] * * 5. Products derived from this software may not be called "Apache", nor may * "Apache" appear in their name, without prior written permission of the * Apache Software Foundation. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU- * DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * ============================================================================ * * This software consists of voluntary contributions made by many individuals * on behalf of the Apache Software Foundation and was originally created by * James Tauber <[EMAIL PROTECTED]>. For more information on the Apache * Software Foundation, please see <http://www.apache.org/>. */ package org.apache.fop.util; /** * This interface defines constants used by the ASCII85 filters. * * @author <a href="mailto:[EMAIL PROTECTED]">Jeremias Maerki</a> * @version $Id: ASCII85Constants.java,v 1.1 2003/07/04 20:01:07 jeremias Exp $ */ public interface ASCII85Constants { /** Special character "z" stands for four NULL bytes (short-cut for !!!!!) */ public static final int ZERO = 0x7A; //"z" /** ZERO as a byte array */ public static final byte[] ZERO_ARRAY = {(byte)ZERO}; /** The start index for ASCII85 characters (!) */ public static final int START = 0x21; //"!" /** The end index for ASCII85 characters (u) */ public static final int END = 0x75; //"u" /** The EOL indicator (LF) */ public static final int EOL = 0x0A; //"\n" /** The EOD (end of data) indicator */ public static final byte[] EOD = {0x7E, 0x3E}; //"~>" /** Array of powers of 85 (4, 3, 2, 1, 0) */ public static final long POW85[] = new long[] {85 * 85 * 85 * 85, 85 * 85 * 85, 85 * 85, 85, 1}; /* public static final long BASE85_4 = 85; public static final long BASE85_3 = BASE85_4 * BASE85_4; public static final long BASE85_2 = BASE85_3 * BASE85_4; public static final long BASE85_1 = BASE85_2 * BASE85_4; */ } 1.1 xml-fop/src/java/org/apache/fop/util/ASCII85InputStream.java Index: ASCII85InputStream.java =================================================================== /* * $Id: ASCII85InputStream.java,v 1.1 2003/07/04 20:01:07 jeremias Exp $ * ============================================================================ * The Apache Software License, Version 1.1 * ============================================================================ * * Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved. * * Redistribution and use in source and binary forms, with or without modifica- * tion, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * 3. The end-user documentation included with the redistribution, if any, must * include the following acknowledgment: "This product includes software * developed by the Apache Software Foundation (http://www.apache.org/)." * Alternately, this acknowledgment may appear in the software itself, if * and wherever such third-party acknowledgments normally appear. * * 4. The names "FOP" and "Apache Software Foundation" must not be used to * endorse or promote products derived from this software without prior * written permission. For written permission, please contact * [EMAIL PROTECTED] * * 5. Products derived from this software may not be called "Apache", nor may * "Apache" appear in their name, without prior written permission of the * Apache Software Foundation. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU- * DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * ============================================================================ * * This software consists of voluntary contributions made by many individuals * on behalf of the Apache Software Foundation and was originally created by * James Tauber <[EMAIL PROTECTED]>. For more information on the Apache * Software Foundation, please see <http://www.apache.org/>. */ package org.apache.fop.util; import java.io.InputStream; import java.io.IOException; /** * This class applies a ASCII85 decoding to the stream. * <p> * The class is derived from InputStream instead of FilteredInputStream because * we can use the read(byte[], int, int) method from InputStream which simply * delegates to read(). This makes the implementation easier. * <p> * The filter is described in chapter 3.13.3 of the PostScript Language * Reference (third edition). * * @author <a href="mailto:[EMAIL PROTECTED]">Jeremias Maerki</a> * @version $Id: ASCII85InputStream.java,v 1.1 2003/07/04 20:01:07 jeremias Exp $ */ public class ASCII85InputStream extends InputStream implements ASCII85Constants { private InputStream in; private boolean eodReached = false; private int[] b = new int[4]; //decoded private int bSize = 0; private int bIndex = 0; /** @see java.io.FilterInputStream **/ public ASCII85InputStream(InputStream in) { super(); this.in = in; } /** @see java.io.FilterInputStream **/ public int read() throws IOException { //Check if we need to read the next tuple if (bIndex >= bSize) { if (eodReached) { return -1; } readNextTuple(); if (bSize == 0) { if (!eodReached) { throw new IllegalStateException("Internal error"); } return -1; } } int result = b[bIndex]; result = (result < 0 ? 256 + result : result); bIndex++; return result; } private int filteredRead() throws IOException { int buf; while (true) { buf = in.read(); switch (buf) { case 0: //null case 9: //tab case 10: //LF case 12: //FF case 13: //CR case 32: //space continue; //ignore case ZERO: case 126: //= EOD[0] = '~' return buf; default: if ((buf >= START) && (buf <= END)) { return buf; } else { throw new IOException("Illegal character detected: " + buf); } } } } private void handleEOD() throws IOException { final int buf = in.read(); if (buf != EOD[1]) { throw new IOException("'>' expected after '~' (EOD)"); } eodReached = true; bSize = 0; bIndex = 0; } private void readNextTuple() throws IOException { int buf; long tuple = 0; //Read ahead and check for special "z" buf = filteredRead(); if (buf == ZERO) { java.util.Arrays.fill(b, 0); bSize = 4; bIndex = 0; } else if (buf == EOD[0]) { handleEOD(); } else { int cIndex = 0; tuple = (buf - START) * POW85[cIndex]; //System.out.println(cIndex + ": " + Long.toHexString(tuple)); cIndex++; while (cIndex < 5) { buf = filteredRead(); if (buf == EOD[0]) { handleEOD(); break; } else if (buf == ZERO) { //Violation 2 throw new IOException("Illegal 'z' within tuple"); } else { tuple += (buf - START) * POW85[cIndex]; //System.out.println(cIndex + ": " + Long.toHexString(tuple)); cIndex++; } } int cSize = cIndex; if (cSize == 1) { //Violation 3 throw new IOException("Only one character in tuple"); } //Handle optional, trailing, incomplete tuple while (cIndex < 5) { tuple += POW85[cIndex - 1]; cIndex++; } if (tuple > (2L << 31) - 1) { //Violation 1 throw new IOException("Illegal tuple (> 2^32 - 1)"); } //Convert tuple b[0] = (byte)((tuple >> 24) & 0xFF); b[1] = (byte)((tuple >> 16) & 0xFF); b[2] = (byte)((tuple >> 8) & 0xFF); b[3] = (byte)((tuple) & 0xFF); bSize = cSize - 1; bIndex = 0; } } }
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