My refactored Archive class
Code:
final class Archive {
public Archive(byte abyte0[]) {
Stream stream = new Stream(abyte0);
int decompressedSize = stream.get24BitInt();
int compressedSize = stream.get24BitInt();
if (compressedSize != decompressedSize) {
byte abyte1[] = new byte[decompressedSize];
BZip2Decompressor.decompressBuffer(abyte1, decompressedSize, abyte0, compressedSize, 6);
finalBuffer = abyte1;
stream = new Stream(finalBuffer);
compressedAsWhole = true;
} else {
finalBuffer = abyte0;
compressedAsWhole = false;
}
totalFiles = stream.getUShort();
identifiers = new int[totalFiles];
decompressedSizes = new int[totalFiles];
compressedSizes = new int[totalFiles];
startOffsets = new int[totalFiles];
int offset = stream.currentOffset + totalFiles * 10; //file info at beginning is 10 bytes per file, and we want to start file data immediately after
for (int l = 0; l < totalFiles; l++) {
identifiers[l] = stream.getInt(); // 4
decompressedSizes[l] = stream.get24BitInt();// 3
compressedSizes[l] = stream.get24BitInt(); //+ 3
startOffsets[l] = offset; //____
offset += compressedSizes[l]; // 10
}
}
public byte[] getFile(int identifier) {
byte dataBuffer[] = null; //was a parameter
for (int k = 0; k < totalFiles; k++)
if (identifiers[k] == identifier) {
if (dataBuffer == null)
dataBuffer = new byte[decompressedSizes[k]];
if (!compressedAsWhole) {
BZip2Decompressor.decompressBuffer(dataBuffer, decompressedSizes[k], finalBuffer, compressedSizes[k], startOffsets[k]);
} else {
System.arraycopy(finalBuffer, startOffsets[k], dataBuffer, 0, decompressedSizes[k]);
}
return dataBuffer;
}
return null;
}
public byte[] getFile(String identStr) {
byte dataBuffer[] = null; //was a parameter
int identifier = 0;
identStr = identStr.toUpperCase();
for (int j = 0; j < identStr.length(); j++)
identifier = (identifier * 61 + identStr.charAt(j)) - 32;
for (int k = 0; k < totalFiles; k++)
if (identifiers[k] == identifier) {
if (dataBuffer == null)
dataBuffer = new byte[decompressedSizes[k]];
if (!compressedAsWhole) {
BZip2Decompressor.decompressBuffer(dataBuffer, decompressedSizes[k], finalBuffer, compressedSizes[k], startOffsets[k]);
} else {
System.arraycopy(finalBuffer, startOffsets[k], dataBuffer, 0, decompressedSizes[k]);
}
return dataBuffer;
}
return null;
}
final byte[] finalBuffer;
final int totalFiles;
final int[] identifiers;
final int[] decompressedSizes;
final int[] compressedSizes;
final int[] startOffsets;
final boolean compressedAsWhole;
}
feel like pasting alot of code :)
