text: /* Copyright (C) Teemu Suutari */
  
  #include <cstring>
  
  #include "common/SubBuffer.hpp"
  #include "CYB2Decoder.hpp"
  #include "XPKMain.hpp"
  #include "common/Common.hpp"
  
  
  namespace ancient::internal
  {
  
  bool CYB2Decoder::detectHeaderXPK(uint32_t hdr) noexcept
  {
  	return hdr==FourCC("CYB2");
  }
  
  std::shared_ptr<XPKDecompressor> CYB2Decoder::create(uint32_t hdr,uint32_t recursionLevel,const Buffer &packedData,std::shared_ptr<XPKDecompressor::State> &state,bool verify)
  {
  	return std::make_shared<CYB2Decoder>(hdr,recursionLevel,packedData,state,verify);
  }
  
  CYB2Decoder::CYB2Decoder(uint32_t hdr,uint32_t recursionLevel,const Buffer &packedData,std::shared_ptr<XPKDecompressor::State> &state,bool verify) :
  	XPKDecompressor(recursionLevel),
  	_packedData(packedData)
  {
  	if (!detectHeaderXPK(hdr) || _packedData.size()<=10) throw Decompressor::InvalidFormatError();
  	_blockHeader=_packedData.readBE32(0);
  	// after the block header, the next 6 bytes seem to be
  	// 00 64 00 00 00 00
  	// Those bytes do not seem to be terribly important though...
  
  	if (verify)
  	{
  		// trigger child checks...
  		ConstSubBuffer blockData(_packedData,10,_packedData.size()-10);
  		std::shared_ptr<XPKDecompressor::State> state;
  		auto sub=XPKMain::createDecompressor(_blockHeader,_recursionLevel+1,blockData,state,true);
  	}
  }
  
  CYB2Decoder::~CYB2Decoder()
  {
  	// nothing needed
  }
  
  const std::string &CYB2Decoder::getSubName() const noexcept
  {
  	static std::string name="XPK-CYB2: xpkCybPrefs container";
  	return name;
  }
  
  void CYB2Decoder::decompressImpl(Buffer &rawData,const Buffer &previousData,bool verify)
  {
  	ConstSubBuffer blockData(_packedData,10,_packedData.size()-10);
  	std::shared_ptr<XPKDecompressor::State> state;
  	auto sub=XPKMain::createDecompressor(_blockHeader,_recursionLevel+1,blockData,state,verify);
  	sub->decompressImpl(rawData,previousData,verify);
  }
  
  }
  