public Map Load(string fileName)
{
if (fileName == null)
{
throw new ArgumentNullException("fileName");
}
using (FileStream mapStream = File.OpenRead(fileName)) {
byte[] temp = new byte[8];
Map map = null;
mapStream.Seek(-4, SeekOrigin.End);
mapStream.Read(temp, 0, 4);
mapStream.Seek(0, SeekOrigin.Begin);
int uncompressedLength = BitConverter.ToInt32(temp, 0);
byte[] data = new byte[uncompressedLength];
using (GZipStream reader = new GZipStream(mapStream, CompressionMode.Decompress, true)) {
reader.Read(data, 0, uncompressedLength);
}
for (int i = 0; i < uncompressedLength - 1; i++)
{
if (data[i] != 0xAC || data[i + 1] != 0xED)
{
continue;
}
// bypassing the header crap
int pointer = i + 6;
Array.Copy(data, pointer, temp, 0, 2);
pointer += IPAddress.HostToNetworkOrder(BitConverter.ToInt16(temp, 0));
pointer += 13;
int headerEnd;
// find the end of serialization listing
for (headerEnd = pointer; headerEnd < data.Length - 1; headerEnd++)
{
if (data[headerEnd] == 0x78 && data[headerEnd + 1] == 0x70)
{
headerEnd += 2;
break;
}
}
// start parsing serialization listing
int offset = 0;
int width = 0, length = 0, height = 0;
Position spawn = new Position();
while (pointer < headerEnd)
{
switch ((char)data[pointer])
{
case 'Z':
offset++;
break;
case 'F':
case 'I':
offset += 4;
break;
case 'J':
offset += 8;
break;
}
pointer += 1;
Array.Copy(data, pointer, temp, 0, 2);
short skip = IPAddress.HostToNetworkOrder(BitConverter.ToInt16(temp, 0));
pointer += 2;
// look for relevant variables
Array.Copy(data, headerEnd + offset - 4, temp, 0, 4);
if (BufferUtil.MemCmp(data, pointer, "width"))
{
width = (ushort)IPAddress.HostToNetworkOrder(BitConverter.ToInt32(temp, 0));
}
else if (BufferUtil.MemCmp(data, pointer, "depth"))
{
height = (ushort)IPAddress.HostToNetworkOrder(BitConverter.ToInt32(temp, 0));
}
else if (BufferUtil.MemCmp(data, pointer, "height"))
{
length = (ushort)IPAddress.HostToNetworkOrder(BitConverter.ToInt32(temp, 0));
}
else if (BufferUtil.MemCmp(data, pointer, "xSpawn"))
{
spawn.X = (short)(IPAddress.HostToNetworkOrder(BitConverter.ToInt32(temp, 0)) * 32 + 16);
}
else if (BufferUtil.MemCmp(data, pointer, "ySpawn"))
{
spawn.Z = (short)(IPAddress.HostToNetworkOrder(BitConverter.ToInt32(temp, 0)) * 32 + 16);
}
else if (BufferUtil.MemCmp(data, pointer, "zSpawn"))
{
spawn.Y = (short)(IPAddress.HostToNetworkOrder(BitConverter.ToInt32(temp, 0)) * 32 + 16);
}
pointer += skip;
}
map = new Map(null, width, length, height, false)
{
Spawn = spawn
};
if (!map.ValidateHeader())
{
throw new MapFormatException("MapDAT: One or more of the map dimensions are invalid.");
}
// find the start of the block array
bool foundBlockArray = false;
offset = Array.IndexOf <byte>(data, 0x00, headerEnd);
while (offset != -1 && offset < data.Length - 2)
{
if (data[offset] == 0x00 && data[offset + 1] == 0x78 && data[offset + 2] == 0x70)
{
foundBlockArray = true;
pointer = offset + 7;
}
offset = Array.IndexOf <byte>(data, 0x00, offset + 1);
}
// copy the block array... or fail
if (foundBlockArray)
{
map.Blocks = new byte[map.Volume];
Array.Copy(data, pointer, map.Blocks, 0, map.Blocks.Length);
map.ConvertBlockTypes(Mapping);
}
else
{
throw new MapFormatException("MapDAT: Could not locate block array.");
}
break;
}
return(map);
}
}