From: Glen Stampoultzis Date: Wed, 12 Jun 2002 08:18:06 +0000 (+0000) Subject: Some more hex reading utilities X-Git-Tag: REL_1_10~325 X-Git-Url: https://source.dussan.org/?a=commitdiff_plain;h=d0ffb5ec71e6f149b0b2227cc9a30b9e0909f0b5;p=poi.git Some more hex reading utilities git-svn-id: https://svn.apache.org/repos/asf/jakarta/poi/trunk@352679 13f79535-47bb-0310-9956-ffa450edef68 --- diff --git a/src/java/org/apache/poi/util/HexRead.java b/src/java/org/apache/poi/util/HexRead.java index c1bda6f613..7dc0580d62 100644 --- a/src/java/org/apache/poi/util/HexRead.java +++ b/src/java/org/apache/poi/util/HexRead.java @@ -1,3 +1,57 @@ +/* ==================================================================== + * The Apache Software License, Version 1.1 + * + * Copyright (c) 2002 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 + * . + */ + package org.apache.poi.util; import java.io.IOException; @@ -7,13 +61,90 @@ 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 { - public static byte[] readTestData( String filename ) + /** + * 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: + * 
+     *  [sectioname]
+     *
+ * + * @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(); @@ -22,6 +153,10 @@ public class HexRead while ( !done ) { int count = stream.read(); + char baseChar = 'a'; + + if ( count == eofChar) + break; switch ( count ) { @@ -29,16 +164,7 @@ public class HexRead case '#': readToEOL(stream); break; - case '0': - case '1': - case '2': - case '3': - case '4': - case '5': - case '6': - case '7': - case '8': - case '9': + 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++; @@ -50,31 +176,12 @@ public class HexRead } break; - case 'A': - case 'B': - case 'C': - case 'D': - case 'E': - case 'F': - b <<= 4; - b += (byte) ( count + 10 - 'A' ); - 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': + case 'a': case 'b': case 'c': case 'd': case 'e': case 'f': b <<= 4; - b += (byte) ( count + 10 - 'a' ); + b += (byte) ( count + 10 - baseChar ); characterCount++; if ( characterCount == 2 ) { @@ -92,7 +199,6 @@ public class HexRead break; } } - stream.close(); Byte[] polished = (Byte[]) bytes.toArray( new Byte[0] ); byte[] rval = new byte[polished.length];