private NitroFile(params Type[] blockTypes)
{
// Check that all types heredites from NitroBlock
foreach (Type t in blockTypes)
{
if (!t.IsSubclassOf(typeof(NitroBlock)))
{
throw new ArgumentException("Invalid type passed.");
}
}
this.hasOffsets = false;
this.blockTypes = blockTypes;
this.blocks = new BlockCollection();
}
protected virtual void Read(Stream strIn, int size)
{
long basePosition = strIn.Position;
BinaryReader br = new BinaryReader(strIn);
// Nitro header
this.magicStamp = this.ReadMagicStamp(br);
ushort bom = br.ReadUInt16();
if (bom != BomLittleEndiannes) // Byte Order Mark
{
if (bom == 0)
{
Console.WriteLine("##ERROR?## There is no BOM value.");
}
else
{
throw new InvalidDataException("The data is not little endiannes.");
}
}
this.version = br.ReadUInt16();
uint fileSize = br.ReadUInt32();
if (fileSize > size)
{
throw new FormatException("File size doesn't match (smaller).");
}
else if (fileSize + 4 < size) // It could be padding bytes.
{
Console.WriteLine("##ERROR?## File size doesn't match (bigger).");
}
else if (fileSize < size)
{
Console.WriteLine("##WARNING## File field is smaller than specified. {0}", size - fileSize);
}
ushort blocksStart = br.ReadUInt16();
ushort numBlocks = br.ReadUInt16();
strIn.Position = basePosition + blocksStart;
uint[] offsets = null;
if (this.hasOffsets)
{
offsets = new uint[numBlocks];
for (int i = 0; i < numBlocks; i++)
{
offsets[i] = br.ReadUInt32();
}
}
this.blocks = new BlockCollection(numBlocks);
for (int i = 0; i < numBlocks; i++)
{
if (this.hasOffsets)
{
strIn.Position = basePosition + offsets[i];
}
if (strIn.Position == strIn.Length)
{
Console.WriteLine("##ERROR?## Missing {0} blocks", numBlocks - i);
return;
}
long blockPosition = strIn.Position;
// First get block parameters
string blockName = this.ReadMagicStamp(br);
int blockSize = br.ReadInt32();
strIn.Position = blockPosition;
Type blockType = Array.Find <Type>(
this.blockTypes, b => b.Name.ToLower() == blockName.ToLower());
if (blockType == null)
{
throw new FormatException("Unknown block --> " + blockName);
}
NitroBlock block = (NitroBlock)Activator.CreateInstance(blockType, this);
block.Read(strIn);
this.blocks.Add(block);
strIn.Position = blockPosition + blockSize;
}
}
