Some more hex reading utilities
git-svn-id: https://svn.apache.org/repos/asf/jakarta/poi/trunk@352679 13f79535-47bb-0310-9956-ffa450edef68
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Glen Stampoultzis
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@ -1,3 +1,57 @@
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/* ====================================================================
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* The Apache Software License, Version 1.1
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*
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* Copyright (c) 2002 The Apache Software Foundation. All rights
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* reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. The end-user documentation included with the redistribution,
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* if any, must include the following acknowledgment:
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* "This product includes software developed by the
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* Apache Software Foundation (http://www.apache.org/)."
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* Alternately, this acknowledgment may appear in the software itself,
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* if and wherever such third-party acknowledgments normally appear.
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*
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* 4. The names "Apache" and "Apache Software Foundation" and
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* "Apache POI" must not be used to endorse or promote products
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* derived from this software without prior written permission. For
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* written permission, please contact apache@apache.org.
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*
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* 5. Products derived from this software may not be called "Apache",
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* "Apache POI", nor may "Apache" appear in their name, without
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* prior written permission of the Apache Software Foundation.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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* ====================================================================
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*
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* This software consists of voluntary contributions made by many
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* individuals on behalf of the Apache Software Foundation. For more
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* information on the Apache Software Foundation, please see
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* <http://www.apache.org/>.
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*/
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package org.apache.poi.util;
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import java.io.IOException;
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@ -7,13 +61,90 @@ import java.io.InputStream;
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import java.util.List;
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import java.util.ArrayList;
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/**
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* Utilities to read hex from files.
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*
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* @author Marc Johnson
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* @author Glen Stampoultzis (glens at apache.org)
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*/
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public class HexRead
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{
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public static byte[] readTestData( String filename )
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/**
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* This method reads hex data from a filename and returns a byte array.
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* The file may contain line comments that are preceeded with a # symbol.
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*
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* @param filename The filename to read
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* @return The bytes read from the file.
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* @throws IOException If there was a problem while reading the file.
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*/
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public static byte[] readData( String filename )
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throws IOException
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{
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File file = new File( filename );
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FileInputStream stream = new FileInputStream( file );
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try
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{
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return readData(stream, -1);
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}
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finally
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{
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stream.close();
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}
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}
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/**
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* Same as readData(String) except that this method allows you to specify sections within
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* a file. Sections are referenced using section headers in the form:
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* <pre>
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* [sectioname]
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* </pre>
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*
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* @see #readData(String)
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*/
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public static byte[] readData(String filename, String section)
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throws IOException
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{
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File file = new File( filename );
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FileInputStream stream = new FileInputStream( file );
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try
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{
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StringBuffer sectionText = new StringBuffer();
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boolean inSection = false;
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int c = stream.read();
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while (c != -1)
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{
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switch(c)
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{
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case '[':
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inSection = true;
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break;
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case '\n': case '\r':
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inSection = false;
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sectionText = new StringBuffer();
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break;
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case ']':
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inSection = false;
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if (sectionText.toString().equals(section))
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return readData(stream, '[');
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sectionText = new StringBuffer();
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break;
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default:
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if (inSection)
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sectionText.append((char)c);
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}
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c = stream.read();
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}
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}
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finally
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{
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stream.close();
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}
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throw new IOException("Section '" + section + "' not found");
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}
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static private byte[] readData( FileInputStream stream, int eofChar ) throws IOException
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{
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int characterCount = 0;
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byte b = (byte) 0;
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List bytes = new ArrayList();
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@ -22,6 +153,10 @@ public class HexRead
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while ( !done )
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{
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int count = stream.read();
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char baseChar = 'a';
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if ( count == eofChar)
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break;
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switch ( count )
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{
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@ -29,16 +164,7 @@ public class HexRead
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case '#':
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readToEOL(stream);
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break;
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case '0':
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case '1':
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case '2':
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case '3':
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case '4':
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case '5':
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case '6':
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case '7':
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case '8':
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case '9':
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case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9':
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b <<= 4;
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b += (byte) ( count - '0' );
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characterCount++;
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@ -50,31 +176,12 @@ public class HexRead
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}
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break;
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case 'A':
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case 'B':
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case 'C':
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case 'D':
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case 'E':
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case 'F':
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b <<= 4;
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b += (byte) ( count + 10 - 'A' );
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characterCount++;
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if ( characterCount == 2 )
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{
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bytes.add( new Byte( b ) );
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characterCount = 0;
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b = (byte) 0;
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}
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break;
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case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
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baseChar = 'A';
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case 'a':
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case 'b':
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case 'c':
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case 'd':
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case 'e':
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case 'f':
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case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
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b <<= 4;
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b += (byte) ( count + 10 - 'a' );
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b += (byte) ( count + 10 - baseChar );
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characterCount++;
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if ( characterCount == 2 )
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{
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@ -92,7 +199,6 @@ public class HexRead
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break;
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}
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}
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stream.close();
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Byte[] polished = (Byte[]) bytes.toArray( new Byte[0] );
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byte[] rval = new byte[polished.length];
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