internal MpqFile(MpqArchive archive, uint index)
{
if (archive == null) throw new ArgumentNullException("archive");
this.archive = archive;
this.blockIndex = index;
}
internal MpqFileCollection(MpqArchive archive)
{
if (archive == null)
{
throw new ArgumentNullException("archive");
}
this.archive = archive;
}
internal MpqFile(MpqArchive archive, uint index)
{
if (archive == null)
{
throw new ArgumentNullException("archive");
}
this.archive = archive;
this.blockIndex = index;
}
private static unsafe bool TestPatchHeader(MpqArchive archive, long offset)
{
var sharedBuffer = CommonMethods.GetSharedBuffer(4);
if (archive.ReadArchiveData(sharedBuffer, 0, offset, 4) != 4)
{
throw new EndOfStreamException();
}
return(sharedBuffer[0] == 0x50 && sharedBuffer[1] == 0x54 && sharedBuffer[2] == 0x43 && sharedBuffer[3] == 0x48);
}
internal MpqUserDataStream(MpqArchive archive)
{
this.archive = archive;
}
internal MpqUserDataStream(MpqArchive archive)
{
this.archive = archive;
}
private static unsafe bool TestPatchHeader(MpqArchive archive, long offset)
{
var sharedBuffer = CommonMethods.GetSharedBuffer(4);
if (archive.ReadArchiveData(sharedBuffer, 0, offset, 4) != 4) throw new EndOfStreamException();
return sharedBuffer[0] == 0x50 && sharedBuffer[1] == 0x54 && sharedBuffer[2] == 0x43 && sharedBuffer[3] == 0x48;
}
private static unsafe PatchInfoHeader ReadPatchInfoHeader(MpqArchive archive, long offset)
{
// Always get a buffer big enough, even if the extra bytes are not present…
// As of now (09/2011), the header should always be 28 bytes long, but this may change in the future…
var sharedBuffer = CommonMethods.GetSharedBuffer(sizeof(PatchInfoHeader));
// No buffer should ever be smaller than 28 bytes… right ?
if (archive.ReadArchiveData(sharedBuffer, 0, offset, 28) != 28)
throw new EndOfStreamException(ErrorMessages.GetString("PatchInfoHeaderEndOfStream")); // It's weird if we could not read the whole 28 bytes… (At worse, we should have read trash data)
var patchInfoHeader = new PatchInfoHeader();
patchInfoHeader.HeaderLength = (uint)sharedBuffer[0] | (uint)sharedBuffer[1] << 8 | (uint)sharedBuffer[2] << 16 | (uint)sharedBuffer[3] << 24;
patchInfoHeader.Flags = (uint)sharedBuffer[4] | (uint)sharedBuffer[5] << 8 | (uint)sharedBuffer[6] << 16 | (uint)sharedBuffer[7] << 24;
patchInfoHeader.PatchLength = (uint)sharedBuffer[8] | (uint)sharedBuffer[9] << 8 | (uint)sharedBuffer[10] << 16 | (uint)sharedBuffer[11] << 24;
// Let's assume the MD5 is not mandatory…
if (patchInfoHeader.HeaderLength >= 28)
for (int i = 0; i < 16; i++) patchInfoHeader.PatchMD5[i] = sharedBuffer[12 + i];
return patchInfoHeader;
}
private static unsafe uint[] ReadBlockOffsets(MpqArchive archive, uint hash, long offset, int count)
{
int length = count * sizeof(uint);
var sharedBuffer = CommonMethods.GetSharedBuffer(length);
if (archive.ReadArchiveData(sharedBuffer, 0, offset, length) != length) throw new EndOfStreamException();
var offsets = new uint[count];
Buffer.BlockCopy(sharedBuffer, 0, offsets, 0, length);
if (!BitConverter.IsLittleEndian) CommonMethods.SwapBytes(offsets);
// If hash is valid, decode the header
if (hash != 0) unchecked { CommonMethods.Decrypt(offsets, hash - 1); }
return offsets;
}
