void Tile::load(BitReader &bits)
{
foreground=bits.r16();
fgHueShift=bits.r8();
fgColorVariant=bits.r8();
fgMod=bits.r16();
fgModHueShift=bits.r8();
background=bits.r16();
bgHueShift=bits.r8();
bgColorVariant=bits.r8();
bgMod=bits.r16();
bgModHueShift=bits.r8();
liquid=bits.r8();
liquidPressure=bits.r8();
bits.skip(6); //collision, dungeonid,biome,envbiome,root
}
bool init ( BitReader br )
{
br.reset();
if ( br.getByte() != 0x64
|| br.getByte() != 0x58
|| br.getByte() != 0x20
|| br.getByte() != 0x25 )
{
return false;
}
// * dca.c dca_exss_parse_header
br.skip(8); // user data
_ssIndex = br.getInt(2);
bool blownUp(br.getBool());
_headerSize = br.getInt(blownUp ? 12 : 8);
//hdLen = ((hdHdr[6] & 0xf) << 11) + (hdHdr[7] << 3) + ((hdHdr[8] >> 5) & 7) + 1;
_hdSize = br.getInt(blownUp ? 20: 16) + 1;
return true;
}
UInt64 WebSocketFramer::readFrame(BitReader& frame, char*& payload)
{
assert(handshakeComplete());
UInt64 limit = frame.limit();
size_t offset = frame.position();
//assert(offset == 0);
// Read the frame header
char header[MAX_HEADER_LENGTH];
BitReader headerReader(header, MAX_HEADER_LENGTH);
frame.get(header, 2);
UInt8 lengthByte = static_cast<UInt8>(header[1]);
int maskOffset = 0;
if (lengthByte & FRAME_FLAG_MASK) maskOffset += 4;
lengthByte &= 0x7f;
if (lengthByte + 2 + maskOffset < MAX_HEADER_LENGTH)
frame.get(header + 2, lengthByte + maskOffset);
else
frame.get(header + 2, MAX_HEADER_LENGTH - 2);
// Reserved fields
frame.skip(2);
// Parse frame header
UInt8 flags;
char mask[4];
headerReader.getU8(flags);
headerReader.getU8(lengthByte);
_frameFlags = flags;
UInt64 payloadLength = 0;
int payloadOffset = 2;
if ((lengthByte & 0x7f) == 127) {
UInt64 l;
headerReader.getU64(l);
if (l > limit)
throw std::runtime_error(util::format("WebSocket error: Insufficient buffer for payload size %" I64_FMT "u", l)); //, ws::ErrorPayloadTooBig
payloadLength = l;
payloadOffset += 8;
}
else if ((lengthByte & 0x7f) == 126) {
UInt16 l;
headerReader.getU16(l);
if (l > limit)
throw std::runtime_error(util::format("WebSocket error: Insufficient buffer for payload size %u", unsigned(l))); //, ws::ErrorPayloadTooBig
payloadLength = l;
payloadOffset += 2;
}
else {
UInt8 l = lengthByte & 0x7f;
if (l > limit)
throw std::runtime_error(util::format("WebSocket error: Insufficient buffer for payload size %u", unsigned(l))); //, ws::ErrorPayloadTooBig
payloadLength = l;
}
if (lengthByte & FRAME_FLAG_MASK) {
headerReader.get(mask, 4);
payloadOffset += 4;
}
if (payloadLength > limit) //length)
throw std::runtime_error("WebSocket error: Incomplete frame received"); //, ws::ErrorIncompleteFrame
// Get a reference to the start of the payload
payload = reinterpret_cast<char*>(const_cast<char*>(frame.begin() + (offset + payloadOffset)));
// Unmask the payload if required
if (lengthByte & FRAME_FLAG_MASK) {
auto p = reinterpret_cast<char*>(payload); //frame.data());
for (UInt64 i = 0; i < payloadLength; i++) {
p[i] ^= mask[i % 4];
}
}
// Update frame length to include payload plus header
frame.seek(std::size_t(offset + payloadOffset + payloadLength));
//frame.limit(offset + payloadOffset + payloadLength);
//int frameLength = (offset + payloadOffset);
//assert(frame.position() == (offset + payloadOffset));
return payloadLength;
}
