app_utils.h

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#ifndef GRAPHSCOPE_APP_UTILS_H_
#define GRAPHSCOPE_APP_UTILS_H_
 
#include <string>
#include <string_view>
#include <vector>
 
namespace gs {
 
class Encoder {
 public:
  Encoder(std::vector<char>& buf) : buf_(buf) {}
 
  void put_long(int64_t v);
 
  size_t skip_long();
 
  void put_long_at(size_t pos, int64_t v);
 
  void put_int(int v);
 
  size_t skip_int();
 
  void put_int_at(size_t pos, int v);
 
  void put_byte(uint8_t v);
 
  void put_bytes(const char* data, size_t size);
 
  size_t skip_byte();
 
  void put_byte_at(size_t pos, uint8_t v);
 
  void put_string(const std::string& v);
 
  void put_string_view(const std::string_view& v);
 
  void put_small_string(const std::string& v);
 
  void put_small_string_view(const std::string_view& v);
 
  void put_double(double v);
 
  void clear();
 
 private:
  std::vector<char>& buf_;
};
 
class Decoder {
 public:
  Decoder(const char* ptr, size_t size) : data_(ptr), end_(ptr + size) {}
  ~Decoder() {}
 
  int get_int();
 
  int64_t get_long();
 
  std::string_view get_string();
 
  std::string_view get_bytes();
 
  std::string_view get_small_string();
 
  uint8_t get_byte();
 
  double get_double();
 
  const char* data() const;
 
  size_t size() const;
 
  bool empty() const;
 
  void reset(const char* ptr, size_t size);
 
 private:
  const char* data_;
  const char* end_;
};
 
}  // namespace gs
 
#endif  // GRAPHSCOPE_APP_UTILS_H_