josch/RSCacheTool
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Compressed and first 5 bytes correlate

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So now it will always remove 5 bytes (and 4 more for compressed files).
Closes #5.
This commit is contained in:
Villermen 2014-11-24 11:12:24 +01:00
parent caf917674f
commit e862a3e3aa
1 changed files with 14 additions and 39 deletions
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53
Program.cs
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@ -211,12 +211,17 @@ namespace RSCacheTool
string outFileName = fileIndex.ToString(); string outFileName = fileIndex.ToString();
byte[] tempBuffer; byte[] tempBuffer;
//remove the first 5 bytes because they are not part of the file
tempBuffer = new byte[fileSize - 5];
Array.Copy(buffer, 5, tempBuffer, 0, fileSize - 5);
buffer = tempBuffer;
//decompress gzip //decompress gzip
if (buffer.Length > 10 && (buffer[9] << 8) + buffer[10] == 0x1f8b) //gzip if (buffer.Length > 5 && (buffer[4] << 8) + buffer[5] == 0x1f8b) //gzip
{ {
//remove the first 9 bytes cause they seem to be descriptors of sorts (no idea what they do but they are not part of the file) //remove another 4 non-file bytes
tempBuffer = new byte[fileSize - 9]; tempBuffer = new byte[fileSize - 4];
Array.Copy(buffer, 9, tempBuffer, 0, fileSize - 9); Array.Copy(buffer, 4, tempBuffer, 0, fileSize - 4);
buffer = tempBuffer; buffer = tempBuffer;
GZipStream decompressionStream = new GZipStream(new MemoryStream(buffer), CompressionMode.Decompress); GZipStream decompressionStream = new GZipStream(new MemoryStream(buffer), CompressionMode.Decompress);
@ -241,11 +246,11 @@ namespace RSCacheTool
} }
//decompress bzip2 //decompress bzip2
if (buffer.Length > 14 && buffer[9] == 0x31 && buffer[10] == 0x41 && buffer[11] == 0x59 && buffer[12] == 0x26 && buffer[13] == 0x53 && buffer[14] == 0x59) //bzip2 if (buffer.Length > 9 && buffer[4] == 0x31 && buffer[5] == 0x41 && buffer[6] == 0x59 && buffer[7] == 0x26 && buffer[8] == 0x53 && buffer[9] == 0x59) //bzip2
{ {
//remove the first 9 bytes cause they seem to be descriptors of sorts (no idea what they do but they are not part of the file) //remove another 4 non-file bytes
tempBuffer = new byte[fileSize - 9]; tempBuffer = new byte[fileSize - 4];
Array.Copy(buffer, 9, tempBuffer, 0, fileSize - 9); Array.Copy(buffer, 4, tempBuffer, 0, fileSize - 4);
buffer = tempBuffer; buffer = tempBuffer;
//prepend file header //prepend file header
@ -285,44 +290,14 @@ namespace RSCacheTool
if (buffer.Length > 3 && (buffer[0] << 24) + (buffer[1] << 16) + (buffer[2] << 8) + buffer[3] == 0x4f676753) if (buffer.Length > 3 && (buffer[0] << 24) + (buffer[1] << 16) + (buffer[2] << 8) + buffer[3] == 0x4f676753)
outFileName += ".ogg"; outFileName += ".ogg";
//detect ogg: 5 bytes - OggS //detect jaga: JAGA
if (buffer.Length > 8 && (buffer[5] << 24) + (buffer[6] << 16) + (buffer[7] << 8) + buffer[8] == 0x4f676753)
{
tempBuffer = new byte[fileSize - 5];
Array.Copy(buffer, 5, tempBuffer, 0, fileSize - 5);
buffer = tempBuffer;
outFileName += ".ogg";
}
//detect jag: JAGA
if (buffer.Length > 3 && (buffer[0] << 24) + (buffer[1] << 16) + (buffer[2] << 8) + buffer[3] == 0x4a414741) if (buffer.Length > 3 && (buffer[0] << 24) + (buffer[1] << 16) + (buffer[2] << 8) + buffer[3] == 0x4a414741)
outFileName += ".jaga"; outFileName += ".jaga";
//detect jag: 5 bytes - JAGA
if (buffer.Length > 8 && (buffer[5] << 24) + (buffer[6] << 16) + (buffer[7] << 8) + buffer[8] == 0x4a414741)
{
tempBuffer = new byte[fileSize - 5];
Array.Copy(buffer, 5, tempBuffer, 0, fileSize - 5);
buffer = tempBuffer;
outFileName += ".jaga";
}
//detect png: .PNG //detect png: .PNG
if (buffer.Length > 3 && (uint)(buffer[0] << 24) + (buffer[1] << 16) + (buffer[2] << 8) + buffer[3] == 0x89504e47) if (buffer.Length > 3 && (uint)(buffer[0] << 24) + (buffer[1] << 16) + (buffer[2] << 8) + buffer[3] == 0x89504e47)
outFileName += ".png"; outFileName += ".png";
//detect png: 5 bytes - .PNG
if (buffer.Length > 8 && (uint)(buffer[5] << 24) + (buffer[6] << 16) + (buffer[7] << 8) + buffer[8] == 0x89504e47)
{
tempBuffer = new byte[fileSize - 5];
Array.Copy(buffer, 5, tempBuffer, 0, fileSize - 5);
buffer = tempBuffer;
outFileName += ".png";
}
//create and write file //create and write file
if (!Directory.Exists(outFileDir)) if (!Directory.Exists(outFileDir))
Directory.CreateDirectory(outFileDir); Directory.CreateDirectory(outFileDir);