binary_reader.hpp

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#pragma once
 
#include <span>
 
namespace wren::utils {
 
class BinaryReader {
 public:
  BinaryReader(const std::span<const std::byte>& data)
      : data_(data), pos_(data_.begin()) {}
 
  void skip(size_t byte_count) { pos_ += static_cast<long>(byte_count); }
 
  template <typename T>
  auto read() {
    std::span sub(pos_, pos_ + sizeof(T));
    pos_ += sizeof(T);
 
    return *reinterpret_cast<const T*>(sub.data());
  }
 
  template <typename T, std::size_t N>
  auto read_list() {
    std::array<T, N> list;
 
    for (auto i = 0; i < N; ++i) {
      list.at(i) = read<T>();
    }
 
    return list;
  }
 
  auto at_end() { return pos_ == data_.end(); }
 
 private:
  std::span<const std::byte> data_;
  std::span<const std::byte>::iterator pos_;
};
 
}  // namespace wren::utils