wc3re/common.hh

#ifndef WC3RE__COMMON_HH__
#define WC3RE__COMMON_HH__

#include <string>
#include <cstring>
#include <cstdio>
#include <cerrno>
#include <memory>

using namespace std::string_literals;

class Exception {
public:
  Exception() : msg_() {
  }

  Exception(std::string msg) : msg_(std::move(msg)) {
  }
  
  virtual ~Exception() {}

  virtual std::string toString() const {
    return "Exception: "s + msg_;
  }
protected:
  std::string msg_;
};

class FormatException : public Exception {
public:
  FormatException(std::string msg) : Exception(std::move(msg)) {
  }
  
  std::string toString() const override {
    return "FormatException: "s + msg_;
  }
};

class POSIXException : public Exception {
public:
  POSIXException(int err, std::string msg = ""): Exception(std::move(msg)), err_(err) {
  }

  int getErr() const {return err_;}
  
  std::string toString() const override {
    return "POSIXException: "s + msg_ + ": "s + std::strerror(err_);
  }

private:
  int err_;
};

struct FILEDeleter {
  void operator()(FILE* file) const {
    fclose(file);
  }
};

using FILEUPtr = std::unique_ptr<FILE, FILEDeleter>;

#endif