oss/RomPatcher.js
oss/RomPatcher.js
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fixed a potential bug while creating patches in some specific scenarios

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Marc Robledo 2018-04-27 21:06:44 +02:00
parent 5ea4024aaf
commit eb40a592b5
6 changed files with 37 additions and 31 deletions
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10
ups.js
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@ -1,4 +1,4 @@
/* UPS module for RomPatcher.js v20171112 - Marc Robledo 2017 - http://www.marcrobledo.com/license */
/* UPS module for RomPatcher.js v20180427 - Marc Robledo 2017-2018 - http://www.marcrobledo.com/license */
/* File format specification: http://www.romhacking.net/documents/392/ */
var UPS_MAGIC='UPS1';
@ -77,7 +77,7 @@ UPS.prototype.apply=function(romFile){
var nextDifference=this.records[i];
nextOffset+=nextDifference.offset;
for(var j=0; j<nextDifference.XORdata.length; j++){
tempFile.writeByte(nextOffset+j, romFile.readByte(nextOffset+j) ^ nextDifference.XORdata[j]);
tempFile.writeByte(nextOffset+j, ((nextOffset+j)<romFile.fileSize?romFile.readByte(nextOffset+j):0x00) ^ nextDifference.XORdata[j]);
}
nextOffset+=nextDifference.XORdata.length+1;
}
@ -173,7 +173,7 @@ function createUPSFromFiles(original, modified){
var seek=0;
var previousSeek=0;
while(seek<modified.fileSize){
var b1=seek>original.fileSize?0x00:original.readByte(seek);
var b1=seek>=original.fileSize?0x00:original.readByte(seek);
var b2=modified.readByte(seek);
if(b1!==b2){
@ -183,7 +183,9 @@ function createUPSFromFiles(original, modified){
while(b1!==b2){
differentBytes.push(b1 ^ b2);
seek++;
b1=seek>original.fileSize?0x00:original.readByte(seek);
if(seek===modified.fileSize)
break;
b1=seek>=original.fileSize?0x00:original.readByte(seek);
b2=modified.readByte(seek);
}