#ifndef WC3RE_UTIL_HH__
#define WC3RE_UTIL_HH__

#include <cstdint>
#include <string>

#include "common.hh"

class MmapFile {
public:
  MmapFile(std::string fileName);
  MmapFile(MmapFile const& copy) = delete;
  MmapFile(MmapFile && move);
  
  ~MmapFile();

  MmapFile& operator=(MmapFile const& copy) = delete;
  MmapFile& operator=(MmapFile && move);

  std::string const& name() const;
  size_t size() const;
  char const* data() const;

  operator bool() const;
private:
  std::string name_;
  FILEUPtr fd_;
  size_t size_;
  void *base_;
};

// Helper functions to read big endian numbers
uint16_t readU16BE(char const* data);
uint32_t readU24BE(char const* data);
uint32_t readU32BE(char const* data);

// Helper functions to read little endian numbers
uint16_t readU16LE(char const* data);
uint32_t readU24LE(char const* data);
uint32_t readU32LE(char const* data);

// Sign-extend b starting at msb
int sextend(unsigned b, unsigned msb);

#endif