BytecodeDeserializer.hpp

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#pragma once
#include "../CodeGen.hpp"
#include <cstdint>
#include <fstream>
#include <string>
#include <vector>
#include <filesystem>
 
namespace Phasor
{

class BytecodeDeserializer
{
  public:
    Bytecode deserialize(const std::vector<uint8_t> &data);

    Bytecode loadFromFile(const std::filesystem::path &filename);
 
  private:
    const uint8_t *_data;
    size_t         position;
    size_t         dataSize;
 
    uint8_t     readUInt8();  
    uint16_t    readUInt16(); 
    uint32_t    readUInt32(); 
    int32_t     readInt32();  
    int64_t     readInt64();  //< Helper method to read Int64
    double      readDouble(); //< Helper method to read Double
    std::string readString(); //< Helper method to read String
 
    void readHeader(uint32_t &checksum);          
    void readConstantPool(Bytecode &bytecode);    
    void readVariableMapping(Bytecode &bytecode); 
    void readInstructions(Bytecode &bytecode);    
    void readFunctionEntries(Bytecode &bytecode); 

    void validateHeader(uint32_t expectedChecksum);

    uint32_t calculateCRC32(const uint8_t *data, size_t size);
};
} // namespace Phasor