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Better ARM9 compression detection.

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Admiral H. Curtiss 2014-05-30 06:48:28 +02:00
parent 005d4c9bd6
commit 4a943e0881
2 changed files with 17 additions and 14 deletions
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3
.gitignore vendored
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@ -1,3 +1,4 @@
bin
obj
*.user
*.user
*.suo

28
Program.cs
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@ -75,27 +75,29 @@ namespace WfcPatcher {
// decompress size info: http://www.crackerscrap.com/docs/dsromstructure.html
// TODO: Is there a better way to figure out if an ARM9 is compressed?
nds.Position = nds.Position - 4;
nds.Position = nds.Position - 8;
uint compressedSize = nds.ReadUInt24();
nds.ReadByte();
uint additionalCompressedSize = nds.ReadUInt32();
uint decompressedSize = additionalCompressedSize + len;
bool compressed;
byte[] decData;
bool compressed = false;
byte[] decData = data;
blz blz = new blz();
try {
blz.arm9 = 1;
decData = blz.BLZ_Decode( data );
// if this condition isn't true then it can't be blz-compressed so don't even try
if ( data.Length == compressedSize + 0x4000 ) {
try {
blz.arm9 = 1;
byte[] maybeDecData = blz.BLZ_Decode( data );
if ( decData.Length == decompressedSize ) {
compressed = true;
} else {
decData = data;
if ( decData.Length == decompressedSize ) {
compressed = true;
decData = maybeDecData;
}
} catch ( Exception ) {
compressed = false;
}
} catch ( Exception ) {
decData = data;
compressed = false;
}
if ( ReplaceInData( decData ) ) {