conky/src/logging.h

/*
 *
 * Conky, a system monitor, based on torsmo
 *
 * Any original torsmo code is licensed under the BSD license
 *
 * All code written since the fork of torsmo is licensed under the GPL
 *
 * Please see COPYING for details
 *
 * Copyright (c) 2004, Hannu Saransaari and Lauri Hakkarainen
 * Copyright (c) 2005-2021 Brenden Matthews, Philip Kovacs, et. al.
 *	(see AUTHORS)
 * All rights reserved.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

#ifndef _LOGGING_H
#define _LOGGING_H

#include <cinttypes>  // correct formatting for int types
#include <cstdio>
#include <stdexcept>
#include "config.h"
#include "i18n.h"

class fork_throw : public std::runtime_error {
 public:
  fork_throw() : std::runtime_error("Fork happened") {}
  fork_throw(const std::string &msg) : std::runtime_error(msg) {}
};

class unknown_arg_throw : public std::runtime_error {
 public:
  unknown_arg_throw() : std::runtime_error("Unknown argumunt given") {}
  unknown_arg_throw(const std::string &msg) : std::runtime_error(msg) {}
};

class combine_needs_2_args_error : public std::runtime_error {
 public:
  combine_needs_2_args_error()
      : std::runtime_error("combine needs arguments: <text1> <text2>") {}
  combine_needs_2_args_error(const std::string &msg)
      : std::runtime_error(msg) {}
};

class obj_create_error : public std::runtime_error {
 public:
  obj_create_error() : std::runtime_error("Failed to create object") {}
  obj_create_error(const std::string &msg) : std::runtime_error(msg) {}
};

void clean_up(void);

template <typename... Args>
inline void gettextize_format(const char *format, Args &&...args) {
  fprintf(stderr, _(format), args...);
}

// explicit specialization for no arguments to avoid the
// "format not a string literal and no format arguments" warning
inline void gettextize_format(const char *format) { fputs(_(format), stderr); }

template <typename... Args>
void NORM_ERR(const char *format, Args &&...args) {
  fprintf(stderr, PACKAGE_NAME ": ");
  gettextize_format(format, args...);
  fputs("\n", stderr);
}

/* critical error with additional cleanup */
template <typename... Args>
__attribute__((noreturn)) inline void CRIT_ERR_FREE(void *memtofree1,
                                                    void *memtofree2,
                                                    const char *format,
                                                    Args &&...args) {
  NORM_ERR(format, args...);
  free(memtofree1);
  free(memtofree2);
  clean_up();
  exit(EXIT_FAILURE);
}

/* critical error */
template <typename... Args>
__attribute__((noreturn)) inline void CRIT_ERR(const char *format,
                                               Args &&...args) {
  CRIT_ERR_FREE(nullptr, nullptr, format, args...);
}

namespace conky {
class error : public std::runtime_error {
 public:
  error(const std::string &msg) : std::runtime_error(msg) {}
};
}  // namespace conky

/* debugging output */
extern int global_debug_level;

#define __DBGP(level, ...)                                               \
  do {                                                                   \
    if (global_debug_level > level) {                                    \
      fprintf(stderr, "DEBUG(%d) [" __FILE__ ":%d]: ", level, __LINE__); \
      gettextize_format(__VA_ARGS__);                                    \
      fputs("\n", stderr);                                               \
    }                                                                    \
  } while (0)
#define DBGP(...) __DBGP(0, __VA_ARGS__)
#define DBGP2(...) __DBGP(1, __VA_ARGS__)

#endif /* _LOGGING_H */