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Merge pull request #1297 from amorris13/issue_1166

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Use Guava's LittleEndianDataInputStream.
This commit is contained in:
Connor Tumbleson 2016-08-05 19:41:27 -04:00 committed by GitHub
commit e1dd436854
4 changed files with 27 additions and 143 deletions
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7
brut.apktool/apktool-lib/src/main/java/brut/androlib/res/decoder/ARSCDecoder.java
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@ -23,7 +23,7 @@ import brut.androlib.res.data.value.*;
import brut.util.Duo;
import brut.androlib.res.data.ResTable;
import brut.util.ExtDataInput;
import com.peterfranza.LittleEndianDataInputStream;
import com.google.common.io.LittleEndianDataInputStream;
import java.io.*;
import java.math.BigInteger;
import java.util.*;
@ -60,7 +60,10 @@ public class ARSCDecoder {
} else {
mFlagsOffsets = null;
}
mIn = new ExtDataInput(new LittleEndianDataInputStream(arscStream));
// We need to explicitly cast to DataInput as otherwise the constructor is ambiguous.
// We choose DataInput instead of InputStream as ExtDataInput wraps an InputStream in
// a DataInputStream which is big-endian and ignores the little-endian behavior.
mIn = new ExtDataInput((DataInput) new LittleEndianDataInputStream(arscStream));
mResTable = resTable;
mKeepBroken = keepBroken;
}

8
brut.apktool/apktool-lib/src/main/java/brut/androlib/res/decoder/AXmlResourceParser.java
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@ -20,7 +20,8 @@ import android.util.TypedValue;
import brut.androlib.AndrolibException;
import brut.androlib.res.xml.ResXmlEncoders;
import brut.util.ExtDataInput;
import com.peterfranza.LittleEndianDataInputStream;
import com.google.common.io.LittleEndianDataInputStream;
import java.io.DataInput;
import java.io.IOException;
import java.io.InputStream;
import java.io.Reader;
@ -69,7 +70,10 @@ public class AXmlResourceParser implements XmlResourceParser {
public void open(InputStream stream) {
close();
if (stream != null) {
m_reader = new ExtDataInput(new LittleEndianDataInputStream(stream));
// We need to explicitly cast to DataInput as otherwise the constructor is ambiguous.
// We choose DataInput instead of InputStream as ExtDataInput wraps an InputStream in
// a DataInputStream which is big-endian and ignores the little-endian behavior.
m_reader = new ExtDataInput((DataInput) new LittleEndianDataInputStream(stream));
}
}

139
brut.apktool/apktool-lib/src/main/java/com/peterfranza/LittleEndianDataInputStream.java
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@ -1,139 +0,0 @@
package com.peterfranza;
import java.io.DataInput;
import java.io.DataInputStream;
import java.io.IOException;
import java.io.InputStream;
public class LittleEndianDataInputStream implements DataInput {
public LittleEndianDataInputStream(InputStream in) {
this.in = in;
this.d = new DataInputStream(in);
w = new byte[8];
}
public int available() throws IOException {
return d.available();
}
public final short readShort() throws IOException
{
d.readFully(w, 0, 2);
return (short)(
(w[1]&0xff) << 8 |
(w[0]&0xff));
}
/**
* Note, returns int even though it reads a short.
*/
public final int readUnsignedShort() throws IOException
{
d.readFully(w, 0, 2);
return (
(w[1]&0xff) << 8 |
(w[0]&0xff));
}
/**
* like DataInputStream.readChar except little endian.
*/
public final char readChar() throws IOException
{
d.readFully(w, 0, 2);
return (char) (
(w[1]&0xff) << 8 |
(w[0]&0xff));
}
/**
* like DataInputStream.readInt except little endian.
*/
public final int readInt() throws IOException
{
d.readFully(w, 0, 4);
return
(w[3]) << 24 |
(w[2]&0xff) << 16 |
(w[1]&0xff) << 8 |
(w[0]&0xff);
}
/**
* like DataInputStream.readLong except little endian.
*/
public final long readLong() throws IOException
{
d.readFully(w, 0, 8);
return
(long)(w[7]) << 56 |
(long)(w[6]&0xff) << 48 |
(long)(w[5]&0xff) << 40 |
(long)(w[4]&0xff) << 32 |
(long)(w[3]&0xff) << 24 |
(long)(w[2]&0xff) << 16 |
(long)(w[1]&0xff) << 8 |
(long)(w[0]&0xff);
}
public final float readFloat() throws IOException {
return Float.intBitsToFloat(readInt());
}
public final double readDouble() throws IOException {
return Double.longBitsToDouble(readLong());
}
public final int read(byte b[], int off, int len) throws IOException {
return in.read(b, off, len);
}
public final void readFully(byte b[]) throws IOException {
d.readFully(b, 0, b.length);
}
public final void readFully(byte b[], int off, int len) throws IOException {
d.readFully(b, off, len);
}
public final int skipBytes(int n) throws IOException {
return d.skipBytes(n);
}
public final boolean readBoolean() throws IOException {
return d.readBoolean();
}
public final byte readByte() throws IOException {
return d.readByte();
}
public int read() throws IOException {
return in.read();
}
public final int readUnsignedByte() throws IOException {
return d.readUnsignedByte();
}
@Deprecated
public final String readLine() throws IOException {
return d.readLine();
}
public final String readUTF() throws IOException {
return d.readUTF();
}
public final void close() throws IOException {
d.close();
}
private DataInputStream d; // to get at high level readFully methods of
// DataInputStream
private InputStream in; // to get at the low-level read methods of
// InputStream
private byte w[]; // work array for buffering input
}

16
brut.j.util/src/main/java/brut/util/ExtDataInput.java
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@ -76,6 +76,22 @@ public class ExtDataInput extends DataInputDelegate {
}
}
/**
* The general contract of DataInput doesn't guarantee all the bytes requested will be skipped
* and failure can occur for many reasons. We override this to try harder to skip all the bytes
* requested (this is similar to DataInputStream's wrapper).
*/
public final int skipBytes(int n) throws IOException {
int total = 0;
int cur = 0;
while ((total < n) && ((cur = (int) super.skipBytes(n - total)) > 0)) {
total += cur;
}
return total;
}
public String readNullEndedString(int length, boolean fixed)
throws IOException {
StringBuilder string = new StringBuilder(16);