public static SFXSaveGameFile Read(Stream input)
{
if (input == null)
{
throw new ArgumentNullException("input");
}
var save = new SFXSaveGameFile
{
_version = input.ReadUInt32()
};
/*if (save._version != 29 && save._version.Swap() != 29 &&
* save._version != 59 && save._version.Swap() != 59)*/
if (save._version != 29 && save._version.Swap() != 29)
{
throw new FormatException("unexpected version");
}
//var endian = save._version == 29 || save._version == 59
var endian = save._version == 29 ? ByteOrder.LittleEndian : ByteOrder.BigEndian;
if (endian == ByteOrder.BigEndian)
{
save._version = save._version.Swap();
}
var reader = new FileReader(input, save._version, endian);
save.Serialize(reader);
if (save._version >= 27)
{
if (input.Position != input.Length - 4)
{
throw new FormatException("bad checksum position");
}
save._checksum = input.ReadUInt32();
}
if (input.Position != input.Length)
{
throw new FormatException("did not consume entire file");
}
save.Endian = endian;
return(save);
}
public static void Write(SFXSaveGameFile save, Stream output)
{
if (save == null)
{
throw new ArgumentNullException("save");
}
if (output == null)
{
throw new ArgumentNullException("output");
}
using (var memory = new MemoryStream())
{
memory.WriteUInt32(save.Version, save._endian);
var writer = new FileWriter(memory, save._version, save._endian);
save.Serialize(writer);
if (save._version >= 27)
{
memory.Position = 0;
uint checksum = 0;
var buffer = new byte[1024];
while (memory.Position < memory.Length)
{
var read = memory.Read(buffer, 0, 1024);
checksum = Crc32.Compute(buffer, 0, read, checksum);
}
save._checksum = checksum;
memory.WriteUInt32(checksum, save._endian);
}
memory.Position = 0;
output.WriteFromStream(memory, memory.Length);
}
}