oss/RomPatcher.js
oss/RomPatcher.js
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fixed an important bug while creating IPS patches in some cases

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marcrobledo 2018-09-19 09:44:18 +02:00
parent 8d0b35d179
commit e70052e963
3 changed files with 12 additions and 9 deletions
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17
ips.js
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@ -1,4 +1,4 @@
/* IPS module for RomPatcher.js v20180428 - Marc Robledo 2016-2018 - http://www.marcrobledo.com/license */
/* IPS module for RomPatcher.js v20180919 - Marc Robledo 2016-2018 - http://www.marcrobledo.com/license */
/* File format specification: http://www.smwiki.net/wiki/IPS_file_format */
var MAX_IPS_SIZE=16777216;
@ -166,8 +166,9 @@ function createIPSFromFiles(original, modified){
var length=1;
/* find difference in next 6 bytes (in order to save space) */
/* force length to be 0xffff-6 bytes to keep IPS standard */
var nearbyDifference=true;
while(nearbyDifference){
while(nearbyDifference && length<(0xffff-6)){
if(seek+6>modified.fileSize){
var finalSeek=modified.fileSize-seek-1;
length+=finalSeek;
@ -176,10 +177,7 @@ function createIPSFromFiles(original, modified){
}
for(var i=6;i>0 && nearbyDifference;i--){
var bc1=original.readByte(seek+i);
var bc2=modified.readByte(seek+i);
if(bc1!=bc2){
if(original.readByte(seek+i)!==modified.readByte(seek+i)){
length+=i;
seek+=i;
break;
@ -197,7 +195,12 @@ function createIPSFromFiles(original, modified){
}
if(RLERecord){
tempFile.addRLERecord(originalSeek, length, data[0]);
if(length<3){
tempFile.addSimpleRecord(originalSeek, data);
}else{
tempFile.addRLERecord(originalSeek, length, data[0]);
}
//tempFile.addRLERecord(originalSeek, length, data[0]);
}else{
tempFile.addSimpleRecord(originalSeek, data);
}