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