public void endChunk()
{
//Pop chunk off stack
int stackSize = chunkStack.Count;
Debug.Assert(stackSize != 0);
Chunk chunk = chunkStack[stackSize - 1];
chunkStack.RemoveAt(stackSize - 1);
long prevPos = stream.Position;
//Move to chunk start
long delta = prevPos - chunk.posBegin;
stream.Seek(-delta, SeekOrigin.Current);
//Write tag and size
writer.Write(IffTag.TagByteSwap(chunk.tag));
writer.Write((byte)chunk.type);
writer.Write((UInt32)(prevPos - chunk.posData));
//Move back to position
stream.Seek(prevPos, SeekOrigin.Begin);
}
public void writeBytes(IffTag tag, byte[] data, UInt32 length)
{
writer.Write(IffTag.TagByteSwap(tag.value));
writer.Write((byte)ChunkType.BINARY);
writer.Write(length);
stream.Write(data, 0, (int)length);
}
public bool readChunk(ref Chunk chunk)
{
//Find current position
chunk.beginPos = stream.Position;
if (chunkStack.Count != 0 && chunk.beginPos >= currentChunk.endPos)
{
return(false);
}
//Tag
chunk.tag = IffTag.TagByteSwap(reader.ReadUInt32());
//Type
chunk.type = (IffWriter.ChunkType)reader.ReadByte();
//Size
switch (chunk.type)
{
case IffWriter.ChunkType.DEFAULT:
case IffWriter.ChunkType.BINARY:
case IffWriter.ChunkType.UTF8:
chunk.size = reader.ReadUInt32();
break;
case IffWriter.ChunkType.UINT8:
case IffWriter.ChunkType.INT8:
chunk.size = 1;
break;
case IffWriter.ChunkType.UINT16:
case IffWriter.ChunkType.INT16:
chunk.size = 2;
break;
case IffWriter.ChunkType.UINT32:
case IffWriter.ChunkType.INT32:
case IffWriter.ChunkType.FLOAT32:
chunk.size = 4;
break;
case IffWriter.ChunkType.UINT64:
case IffWriter.ChunkType.INT64:
case IffWriter.ChunkType.FLOAT64:
chunk.size = 8;
break;
default:
Debug.Assert(false); //Data malformed
return(false);
}
//Metadata
chunk.dataPos = stream.Position;
chunk.endPos = chunk.dataPos + chunk.size;
//Return
return(true);
}
public Double readFloat64(IffTag tag, Double defaultValue, SeekPos seekPos = SeekPos.BEGIN)
{
Double value = 0;
if (findFloat64(tag, ref value, seekPos))
{
return(value);
}
else
{
return(defaultValue);
}
}
public Single readFloat32(IffTag tag, Single defaultValue, SeekPos seekPos = SeekPos.BEGIN)
{
Single value = 0;
if (findFloat32(tag, ref value, seekPos))
{
return(value);
}
else
{
return(defaultValue);
}
}
public byte readInt8(IffTag tag, byte defaultValue, SeekPos seekPos = SeekPos.BEGIN)
{
byte value = 0;
if (findInt8(tag, ref value, seekPos))
{
return(value);
}
else
{
return(defaultValue);
}
}
public Int64 readInt64(IffTag tag, Int64 defaultValue, SeekPos seekPos = SeekPos.BEGIN)
{
Int64 value = 0;
if (findInt64(tag, ref value, seekPos))
{
return(value);
}
else
{
return(defaultValue);
}
}
//Read
public bool readBool(IffTag tag, bool defaultValue, SeekPos seekPos = SeekPos.BEGIN)
{
bool value = false;
if (findBool(tag, ref value, seekPos))
{
return(value);
}
else
{
return(defaultValue);
}
}
public UInt32 readUInt32(IffTag tag, UInt32 defaultValue, SeekPos seekPos = SeekPos.BEGIN)
{
UInt32 value = 0;
if (findUInt32(tag, ref value, seekPos))
{
return(value);
}
else
{
return(defaultValue);
}
}
public bool findInt8(IffTag tag, ref byte result, SeekPos seekPos = SeekPos.BEGIN)
{
//Begin chunk
if (!findChunk(tag, seekPos))
{
return(false);
}
//Parse
result = parseNumeric()[0];
//Return
endChunk();
return(true);
}
public bool findFloat64(IffTag tag, ref Double result, SeekPos seekPos = SeekPos.BEGIN)
{
//Begin chunk
if (!findChunk(tag, seekPos))
{
return(false);
}
//Parse
result = BitConverter.ToDouble(parseNumeric(), 0);
//Return
endChunk();
return(true);
}
public void writeString(IffTag tag, string value)
{
if (!String.IsNullOrEmpty(value))
{
UInt32 length = (UInt32)value.Length;
writer.Write(IffTag.TagByteSwap(tag.value));
writer.Write((byte)ChunkType.UTF8);
writer.Write(length);
writer.Write(value.ToCharArray());
}
else
{
writer.Write(IffTag.TagByteSwap(tag.value));
writer.Write((byte)ChunkType.UTF8);
writer.Write((UInt32)0);
}
}
public void beginChunk(IffTag tag, ChunkType type = IffWriter.ChunkType.DEFAULT)
{
//Check if this makes sense
if (chunkStack.Count != 0 && chunkStack[chunkStack.Count - 1].type != ChunkType.DEFAULT)
{
Debug.Assert(false);
return;
}
//Push chunk onto stack
Chunk chunk = new Chunk();
chunk.tag = tag.value;
chunk.type = type;
chunk.posBegin = stream.Position;
chunk.posData = chunk.posBegin + 9;
chunkStack.Add(chunk);
//Write
stream.Seek(9, SeekOrigin.Current);
}
public void writeBool(IffTag tag, bool value)
{
writer.Write(IffTag.TagByteSwap(tag.value));
writer.Write((byte)ChunkType.UINT8);
writer.Write(Convert.ToByte(value));
}
public void writeUInt32(IffTag tag, UInt32 value)
{
writer.Write(IffTag.TagByteSwap(tag.value));
writer.Write((byte)ChunkType.UINT32);
writer.Write(value);
}
public void writeFloat64(IffTag tag, Double value)
{
writer.Write(IffTag.TagByteSwap(tag.value));
writer.Write((byte)ChunkType.FLOAT64);
writer.Write(value);
}
public void writeFloat32(IffTag tag, Single value)
{
writer.Write(IffTag.TagByteSwap(tag.value));
writer.Write((byte)ChunkType.FLOAT32);
writer.Write(value);
}
public void writeInt64(IffTag tag, Int64 value)
{
writer.Write(IffTag.TagByteSwap(tag.value));
writer.Write((byte)ChunkType.INT64);
writer.Write(value);
}
public void writeInt8(IffTag tag, byte value)
{
writer.Write(IffTag.TagByteSwap(tag.value));
writer.Write((byte)ChunkType.INT8);
writer.Write(value);
}
