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package com.pkrandom.newnds;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.RandomAccessFile;
import com.pkrandom.FileFunctions;
import cuecompressors.BLZCoder;
/*----------------------------------------------------------------------------*/
/*-- NDSY9Entry.java - an entry in the arm9 overlay system --*/
/*-- Code based on "Nintendo DS rom tool", copyright (C) DevkitPro --*/
/*-- Original Code by Rafael Vuijk, Dave Murphy, Alexei Karpenko --*/
/*-- --*/
/*-- --*/
/*-- This program is free software: you can redistribute it and/or modify --*/
/*-- it under the terms of the GNU General Public License as published by --*/
/*-- the Free Software Foundation, either version 3 of the License, or --*/
/*-- (at your option) any later version. --*/
/*-- --*/
/*-- This program 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 for more details. --*/
/*-- --*/
/*-- You should have received a copy of the GNU General Public License --*/
/*-- along with this program. If not, see <http://www.gnu.org/licenses/>. --*/
/*----------------------------------------------------------------------------*/
public class NDSY9Entry {
private NDSRom parent;
public int offset, size, original_size;
public int fileID;
public int overlay_id;
public int ram_address, ram_size;
public int bss_size;
public int static_start, static_end;
public int compressed_size;
public int compress_flag;
private Extracted status = Extracted.NOT;
private String extFilename;
public byte[] data;
public long originalCRC;
private boolean decompressed_data = false;
public NDSY9Entry(NDSRom parent) {
this.parent = parent;
}
public byte[] getContents() throws IOException {
if (this.status == Extracted.NOT) {
// extract file
parent.reopenROM();
RandomAccessFile rom = parent.getBaseRom();
byte[] buf = new byte[this.original_size];
rom.seek(this.offset);
rom.readFully(buf);
originalCRC = FileFunctions.getCRC32(buf);
// Compression?
if (compress_flag != 0 && this.original_size == this.compressed_size && this.compressed_size != 0) {
buf = new BLZCoder(null).BLZ_DecodePub(buf, "overlay " + overlay_id);
decompressed_data = true;
}
if (parent.isWritingEnabled()) {
// make a file
String tmpDir = parent.getTmpFolder();
String fullPath = String.format("overlay_%04d", overlay_id);
this.extFilename = fullPath.replaceAll("[^A-Za-z0-9_]+", "");
File tmpFile = new File(tmpDir + extFilename);
FileOutputStream fos = new FileOutputStream(tmpFile);
fos.write(buf);
fos.close();
tmpFile.deleteOnExit();
this.status = Extracted.TO_FILE;
this.data = null;
return buf;
} else {
this.status = Extracted.TO_RAM;
this.data = buf;
byte[] newcopy = new byte[buf.length];
System.arraycopy(buf, 0, newcopy, 0, buf.length);
return newcopy;
}
} else if (this.status == Extracted.TO_RAM) {
byte[] newcopy = new byte[this.data.length];
System.arraycopy(this.data, 0, newcopy, 0, this.data.length);
return newcopy;
} else {
String tmpDir = parent.getTmpFolder();
return FileFunctions.readFileFullyIntoBuffer(tmpDir + this.extFilename);
}
}
public void writeOverride(byte[] data) throws IOException {
if (status == Extracted.NOT) {
// temp extract
getContents();
}
size = data.length;
if (status == Extracted.TO_FILE) {
String tmpDir = parent.getTmpFolder();
FileOutputStream fos = new FileOutputStream(new File(tmpDir + this.extFilename));
fos.write(data);
fos.close();
} else {
if (this.data.length == data.length) {
// copy new in
System.arraycopy(data, 0, this.data, 0, data.length);
} else {
// make new array
this.data = null;
this.data = new byte[data.length];
System.arraycopy(data, 0, this.data, 0, data.length);
}
}
}
// returns null if no override
public byte[] getOverrideContents() throws IOException {
if (status == Extracted.NOT) {
return null;
}
byte[] buf = getContents();
if (this.decompressed_data) {
buf = new BLZCoder(null).BLZ_EncodePub(buf, false, false, "overlay " + overlay_id);
// update our compressed size
this.compressed_size = buf.length;
}
return buf;
}
private enum Extracted {
NOT, TO_FILE, TO_RAM
}
}
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