116 lines
4.0 KiB
Java
116 lines
4.0 KiB
Java
/*
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* Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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import java.io.BufferedReader;
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import java.io.ByteArrayInputStream;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import java.util.ArrayList;
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import java.util.List;
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/**
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* HexDumpReader provides utility methods to read a hex dump text file
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* and convert to an InputStream. The format supported by the methods
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* can be generated by the following command.
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*
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* $ od -vw -t x1 foo | sed -r -e 's/^[0-9]+ ?//' -e 's/ //g' -e '/^$/d'
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*/
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public class HexDumpReader {
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public static InputStream getStreamFromHexDump(String fileName) {
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return getStreamFromHexDump(new File(System.getProperty("test.src", "."),
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fileName));
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}
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public static InputStream getStreamFromHexDump(File hexFile) {
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ByteArrayBuilder bab = new ByteArrayBuilder();
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int lineNo = 0;
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try (BufferedReader reader
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= new BufferedReader(new InputStreamReader(new FileInputStream(hexFile),
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"us-ascii"))) {
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String line;
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while ((line = reader.readLine()) != null) {
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lineNo++;
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line = line.trim();
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// Skip blank and comment lines.
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if (line.length() == 0) {
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continue;
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}
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int x = line.indexOf('#');
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if (x == 0) {
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continue;
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}
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if (x > 0) {
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line = line.substring(0, x).trim();
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}
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int len = line.length();
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for (int i = 0; i < len; i += 2) {
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bab.put((byte)Integer.parseInt(line, i, i + 2, 16));
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}
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}
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} catch (Exception e) {
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throw new RuntimeException(hexFile.getName() + ":error:" + lineNo + ": " + e, e);
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}
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return new ByteArrayInputStream(bab.toArray());
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}
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private static class ByteArrayBuilder {
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private static final int BUFFER_SIZE = 4096;
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private int size;
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private List<byte[]> bytes;
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private byte[] current;
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private int offset;
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ByteArrayBuilder() {
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bytes = new ArrayList<>();
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current = new byte[BUFFER_SIZE];
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}
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void put(byte b) {
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if (offset == BUFFER_SIZE) {
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bytes.add(current);
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current = new byte[BUFFER_SIZE];
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offset = 0;
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}
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current[offset++] = b;
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size++;
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}
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byte[] toArray() {
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byte[] buf = new byte[size];
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int ptr = 0;
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for (byte[] ba : bytes) {
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System.arraycopy(ba, 0, buf, ptr, ba.length);
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ptr += ba.length;
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}
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System.arraycopy(current, 0, buf, ptr, offset);
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assert ptr + offset == size;
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return buf;
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}
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}
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}
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