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/*

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 * error handling

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 */

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void _generic_err ( /*int level, */ int use_stderr, const char *func, int perr, const char *fmt, ...)

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        __attribute__ ((format (printf, 4, 5)));

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// needs to be defined as its own function for the noreturn attribute

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void _generic_err_exit ( /* int level, */ int used_stderr, const char *func, int perr, const char *fmt, ...)

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        __attribute__ ((format (printf, 4, 5)))

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        __attribute__ ((noreturn));

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enum _debug_level {

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    DEBUG_FATAL,

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    DEBUG_ERROR,

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    DEBUG_WARNING,

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    DEBUG_INFO,

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    DEBUG_DEBUG,

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};

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// not currently used

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extern enum _debug_level _cur_debug_level;

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// various kinds of ways to handle an error, 2**3 of them, *g*

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#define info(...)                   _generic_err(       0,  NULL,   0,  __VA_ARGS__ )

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#define error(...)                  _generic_err(       1,  NULL,   0,  __VA_ARGS__ )

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#define err_exit(...)               _generic_err_exit(  1,  NULL,   0,  __VA_ARGS__ )

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#define perr(...)                   _generic_err(       1,  NULL,   1,  __VA_ARGS__ )

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#define perr_exit(...)              _generic_err_exit(  1,  NULL,   1,  __VA_ARGS__ )

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#define err_func(func, ...)         _generic_err(       1,  func,   0,  __VA_ARGS__ )

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#define err_func_exit(func, ...)    _generic_err_exit(  1,  func,   0,  __VA_ARGS__ )

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#define perr_func(func, ...)        _generic_err(       1,  func,   1,  __VA_ARGS__ )

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#define perr_func_exit(func, ...)   _generic_err_exit(  1,  func,   1,  __VA_ARGS__ )

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// error(func + colon + msg, ...) + goto error

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#define ERROR(...) do { err_func(__func__, __VA_ARGS__); goto error; } while (0)

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#define PERROR(...) do { perr_func(__func__, __VA_ARGS__); goto error; } while (0)

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#define FATAL(...) err_func_exit(__func__, __VA_ARGS__)

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#define PFATAL(...) perr_func_exit(__func__, __VA_ARGS__)

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#define WARNING(...) err_func(__func__, __VA_ARGS__)

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#define PWARNING(...) perr_func(__func__, __VA_ARGS__)

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#ifdef DEBUG_ENABLED

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#define DEBUG(...) err_func(__func__, __VA_ARGS__)

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#else

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#define DEBUG(...) (void) (0)

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#endif

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// default is to enable INFO

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#ifdef INFO_DISABLED

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    #define INFO_ENABLED 0

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#else

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    #ifndef INFO_ENABLED

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        #define INFO_ENABLED 1

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    #endif

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#endif

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#if INFO_ENABLED

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#define INFO(...) info(__VA_ARGS__)

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#else

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#define INFO(...) (void) (0)

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#endif

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