| /* ==================================================================== * The Apache Software License, Version 1.1 * * Copyright (c) 2003 The Apache Software Foundation. All rights * reserved. * * Redistribution and use in source and binary forms, with or without * modification, 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 "Apache" and "Apache Software Foundation" and * "Apache POI" must not be used to endorse or promote products * derived from this software without prior written permission. For * written permission, please contact apache@apache.org. * * 5. Products derived from this software may not be called "Apache", * "Apache POI", 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 (INCLUDING, 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. For more * information on the Apache Software Foundation, please see * <http://www.apache.org/>. */package org.apache.poi.util;import java.io.IOException;import java.io.File;import java.io.FileInputStream;import java.io.InputStream;import java.util.List;import java.util.ArrayList;/** * Utilities to read hex from files. * * @author Marc Johnson * @author Glen Stampoultzis (glens at apache.org) */public class HexRead{ /** * This method reads hex data from a filename and returns a byte array. * The file may contain line comments that are preceeded with a # symbol. * * @param filename The filename to read * @return The bytes read from the file. * @throws IOException If there was a problem while reading the file. */ public static byte[] readData( String filename ) throws IOException { File file = new File( filename ); FileInputStream stream = new FileInputStream( file ); try { return readData(stream, -1); } finally { stream.close(); } } /** * Same as readData(String) except that this method allows you to specify sections within * a file. Sections are referenced using section headers in the form: * <pre> * [sectioname] * </pre> * * @see #readData(String) */ public static byte[] readData(String filename, String section) throws IOException { File file = new File( filename ); FileInputStream stream = new FileInputStream( file ); try { StringBuffer sectionText = new StringBuffer(); boolean inSection = false; int c = stream.read(); while (c != -1) { switch(c) { case '[': inSection = true; break; case '\n': case '\r': inSection = false; sectionText = new StringBuffer(); break; case ']': inSection = false; if (sectionText.toString().equals(section)) return readData(stream, '['); sectionText = new StringBuffer(); break; default: if (inSection) sectionText.append((char)c); } c = stream.read(); } } finally { stream.close(); } throw new IOException("Section '" + section + "' not found"); } static private byte[] readData( FileInputStream stream, int eofChar ) throws IOException { int characterCount = 0; byte b = (byte) 0; List bytes = new ArrayList(); boolean done = false; while ( !done ) { int count = stream.read(); char baseChar = 'a'; if ( count == eofChar) break; switch ( count ) { case '#': readToEOL(stream); break; case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': b <<= 4; b += (byte) ( count - '0' ); characterCount++; if ( characterCount == 2 ) { bytes.add( new Byte( b ) ); characterCount = 0; b = (byte) 0; } break; case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': baseChar = 'A'; case 'a': case 'b': case 'c': case 'd': case 'e': case 'f': b <<= 4; b += (byte) ( count + 10 - baseChar ); characterCount++; if ( characterCount == 2 ) { bytes.add( new Byte( b ) ); characterCount = 0; b = (byte) 0; } break; case -1: done = true; break; default : break; } } Byte[] polished = (Byte[]) bytes.toArray( new Byte[0] ); byte[] rval = new byte[polished.length]; for ( int j = 0; j < polished.length; j++ ) { rval[j] = polished[j].byteValue(); } return rval; } static private void readToEOL( InputStream stream ) throws IOException { int c = stream.read(); while ( c != -1 && c != '\n' && c != '\r') { c = stream.read(); } }} |