oss/RomPatcher.js
oss/RomPatcher.js
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WIP: Tauri app conversion

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Iranon 2024-06-04 17:42:12 +02:00
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commit 1e2e84264e
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public/scripts/formats/aps_gba.js Normal file
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/* APS (GBA) module for Rom Patcher JS v20230331 - Marc Robledo 2017-2023 - http://www.marcrobledo.com/license */
/* File format specification: https://github.com/btimofeev/UniPatcher/wiki/APS-(GBA) */
const APS_GBA_MAGIC='APS1';
const APS_GBA_BLOCK_SIZE=0x010000; //64Kb
const APS_GBA_RECORD_SIZE=4 + 2 + 2 + APS_GBA_BLOCK_SIZE;
function APSGBA(){
this.sourceSize=0;
this.targetSize=0;
this.records=[];
}
APSGBA.prototype.addRecord=function(offset, sourceCrc16, targetCrc16, xorBytes){
this.records.push({
offset:offset,
sourceCrc16:sourceCrc16,
targetCrc16:targetCrc16,
xorBytes:xorBytes}
);
}
APSGBA.prototype.toString=function(){
var s='Total records: '+this.records.length;
s+='\nInput file size: '+this.sourceSize;
s+='\nOutput file size: '+this.targetSize;
return s
}
APSGBA.prototype.validateSource=function(sourceFile){
if(sourceFile.fileSize!==this.sourceSize)
return false;
for(var i=0; i<this.records.length; i++){
sourceFile.seek(this.records[i].offset);
var bytes=sourceFile.readBytes(APS_GBA_BLOCK_SIZE);
if(crc16(sourceFile, this.records[i].offset, APS_GBA_BLOCK_SIZE) !== this.records[i].sourceCrc16)
return false
}
return true
}
APSGBA.prototype.export=function(fileName){
var patchFileSize=12 + (this.records.length * APS_GBA_RECORD_SIZE);
tempFile=new MarcFile(patchFileSize);
tempFile.littleEndian=true;
tempFile.fileName=fileName+'.aps';
tempFile.writeString(APS_GBA_MAGIC, APS_GBA_MAGIC.length);
tempFile.writeU32(this.sourceSize);
tempFile.writeU32(this.targetSize);
for(var i=0; i<this.records.length; i++){
tempFile.writeU32(this.records[i].offset);
tempFile.writeU16(this.records[i].sourceCrc16);
tempFile.writeU16(this.records[i].targetCrc16);
tempFile.writeBytes(this.records[i].xorBytes);
}
return tempFile
}
APSGBA.prototype.apply=function(romFile, validate){
if(validate && !this.validateSource(romFile)){
throw new Error('error_crc_input');
}
tempFile=new MarcFile(this.targetSize);
romFile.copyToFile(tempFile, 0, romFile.fileSize);
for(var i=0; i<this.records.length; i++){
romFile.seek(this.records[i].offset);
tempFile.seek(this.records[i].offset);
for(var j=0; j<APS_GBA_BLOCK_SIZE; j++){
tempFile.writeU8(romFile.readU8() ^ this.records[i].xorBytes[j]);
}
if(validate && crc16(tempFile, this.records[i].offset, APS_GBA_BLOCK_SIZE)!==this.records[i].targetCrc16){
throw new Error('error_crc_output');
}
}
return tempFile
}
APSGBA.fromFile=function(patchFile){
patchFile.seek(0);
patchFile.littleEndian=true;
if(
patchFile.readString(APS_GBA_MAGIC.length)!==APS_GBA_MAGIC ||
patchFile.fileSize < (12 + APS_GBA_RECORD_SIZE) ||
(patchFile.fileSize-12)%APS_GBA_RECORD_SIZE!==0
)
return null;
var patch=new APSGBA();
patch.sourceSize=patchFile.readU32();
patch.targetSize=patchFile.readU32();
while(!patchFile.isEOF()){
var offset=patchFile.readU32();
var sourceCrc16=patchFile.readU16();
var targetCrc16=patchFile.readU16();
var xorBytes=patchFile.readBytes(APS_GBA_BLOCK_SIZE);
patch.addRecord(offset, sourceCrc16, targetCrc16, xorBytes);
}
return patch;
}