Method Read

BeefySysLib/FileStream.cpp:102–146

}

void FileStream::Read(void* ptr, int size)
{
	if (mCacheBuffer != NULL)
	{
		while (true)
		{
			int buffOffset = mVFilePos - mCacheReadPos;
			if ((buffOffset >= 0) && (buffOffset + size < mCacheSize))
			{
				// If inside
				memcpy(ptr, mCacheBuffer + buffOffset, size);
				mVFilePos += size;
				return;
			}
			else if ((buffOffset >= 0) && (buffOffset < mCacheSize))
			{
				int subSize = mCacheReadPos + mCacheSize - mVFilePos;
				memcpy(ptr, mCacheBuffer + buffOffset, subSize);
				mVFilePos += subSize;

				ptr = (uint8*) ptr + subSize;
				size -= subSize;
			}
			
			mCacheReadPos = mVFilePos & ~(4096-1);
			fseek(mFP, mCacheReadPos, SEEK_SET);
			int aSize = (int)fread(mCacheBuffer, 1, mCacheSize, mFP);
			if (aSize != mCacheSize)
			{
				// Zero out underflow bytes
				memset((uint8*) ptr + aSize, 0, mCacheSize - aSize);
			}
		}
	}
	else
	{
		int aSize = (int)fread(ptr, 1, size, mFP);
		if (aSize != size)
		{
			// Zero out underflow bytes
			memset((uint8*) ptr + aSize, 0, size - aSize);
			mReadPastEnd = true;
		}
	}
}

void FileStream::Write(void* ptr, int size)
{