terom@8: #ifndef LIB_LOG_H
terom@8: #define LIB_LOG_H
terom@1: 
terom@1: /*
terom@1:  * error handling
terom@1:  */
terom@1: 
terom@16: enum log_display_flags {
terom@16:     LOG_DISPLAY_STDOUT =    0x00,
terom@16:     LOG_DISPLAY_STDERR =    0x01,
terom@16: 
terom@16:     LOG_DISPLAY_PERR =      0x02,
terom@16: 
terom@16:     LOG_DISPLAY_NONL =      0x04,
terom@27: 
terom@27:     LOG_DISPLAY_FATAL =     0x08,
terom@16: };
terom@16: 
terom@16: 
terom@16: void _generic_err (int flags, const char *func, int err, const char *fmt, ...)
terom@1:         __attribute__ ((format (printf, 4, 5)));
terom@1: 
terom@1: // needs to be defined as its own function for the noreturn attribute
terom@16: void _generic_err_exit (int flags, const char *func, int err, const char *fmt, ...)
terom@1:         __attribute__ ((format (printf, 4, 5)))
terom@1:         __attribute__ ((noreturn));
terom@1: 
terom@28: static inline void debug_dummy (int dummy, ...) { /* no-op */ }
terom@28: 
terom@1: enum _debug_level {
terom@1:     DEBUG_FATAL,
terom@1:     DEBUG_ERROR,
terom@1:     DEBUG_WARNING,
terom@1:     DEBUG_INFO,
terom@1:     DEBUG_DEBUG,
terom@1: };
terom@1: 
terom@1: // not currently used
terom@1: extern enum _debug_level _cur_debug_level;
terom@1: 
terom@1: // various kinds of ways to handle an error, 2**3 of them, *g*
terom@16: #define info(...)                   _generic_err(       LOG_DISPLAY_STDOUT,                     NULL, 0,    __VA_ARGS__ )
terom@31: #define info_nonl(...)              _generic_err(       LOG_DISPLAY_STDOUT | LOG_DISPLAY_NONL,  NULL, 0,    __VA_ARGS__ )
terom@16: #define error(...)                  _generic_err(       LOG_DISPLAY_STDERR,                     NULL, 0,    __VA_ARGS__ )
terom@16: #define err_exit(...)               _generic_err_exit(  LOG_DISPLAY_STDERR,                     NULL, 0,    __VA_ARGS__ )
terom@16: #define perr(...)                   _generic_err(       LOG_DISPLAY_STDERR | LOG_DISPLAY_PERR,  NULL, 0,    __VA_ARGS__ )
terom@16: #define perr_exit(...)              _generic_err_exit(  LOG_DISPLAY_STDERR | LOG_DISPLAY_PERR,  NULL, 0,    __VA_ARGS__ )
terom@16: #define err_func(func, ...)         _generic_err(       LOG_DISPLAY_STDERR,                     func, 0,    __VA_ARGS__ )
terom@24: #define err_func_nonl(func, ...)    _generic_err(       LOG_DISPLAY_STDERR | LOG_DISPLAY_NONL,  func, 0,    __VA_ARGS__ )
terom@16: #define err_func_exit(func, ...)    _generic_err_exit(  LOG_DISPLAY_STDERR,                     func, 0,    __VA_ARGS__ )
terom@16: #define perr_func(func, ...)        _generic_err(       LOG_DISPLAY_STDERR | LOG_DISPLAY_PERR,  func, 0,    __VA_ARGS__ )
terom@16: #define perr_func_exit(func, ...)   _generic_err_exit(  LOG_DISPLAY_STDERR | LOG_DISPLAY_PERR,  func, 0,    __VA_ARGS__ )
terom@16: #define eerr_func(func, err, ...)   _generic_err(       LOG_DISPLAY_STDERR | LOG_DISPLAY_PERR,  func, err,  __VA_ARGS__ )
terom@28: #define eerr_func_exit(func,err,...) _generic_err_exit( LOG_DISPLAY_STDERR | LOG_DISPLAY_PERR,  func, err,  __VA_ARGS__ )
terom@16: #define debug(func, ...)            _generic_err(       LOG_DISPLAY_STDERR,                     func, 0,    __VA_ARGS__ )
terom@16: #define debug_nonl(func, ...)       _generic_err(       LOG_DISPLAY_STDERR | LOG_DISPLAY_NONL,  func, 0,    __VA_ARGS__ )
terom@1: 
terom@16: // logging includes errors
terom@8: #include "error.h"
terom@8: 
terom@1: #define WARNING(...) err_func(__func__, __VA_ARGS__)
terom@27: #define NWARNING(...) err_func_nonl(__func__, __VA_ARGS__)
terom@1: #define PWARNING(...) perr_func(__func__, __VA_ARGS__)
terom@2: #define EWARNING(err, ...) eerr_func(__func__, (err), __VA_ARGS__)
terom@1: 
terom@1: #ifdef DEBUG_ENABLED
terom@16: #define DEBUG(...) debug(__func__, __VA_ARGS__)
terom@16: #define DEBUGF(...) debug(NULL, __VA_ARGS__)
terom@16: #define DEBUGN(...) debug_nonl(__func__, __VA_ARGS__)
terom@16: #define DEBUGNF(...) debug_nonl(NULL, __VA_ARGS__)
terom@1: #else
terom@28: #define DEBUG(...) debug_dummy(0, __VA_ARGS__)
terom@28: #define DEBUGF(...) debug_dummy(0, __VA_ARGS__)
terom@28: #define DEBUGN(...) debug_dummy(0, __VA_ARGS__)
terom@28: #define DEBUGNF(...) debug_dummy(0, __VA_ARGS__)
terom@1: #endif
terom@1: 
terom@1: // default is to enable INFO
terom@1: #ifdef INFO_DISABLED
terom@1:     #define INFO_ENABLED 0
terom@1: #else
terom@1:     #ifndef INFO_ENABLED
terom@1:         #define INFO_ENABLED 1
terom@1:     #endif
terom@1: #endif
terom@1: 
terom@1: #if INFO_ENABLED
terom@1: #define INFO(...) info(__VA_ARGS__)
terom@31: #define INFON(...) info_nonl(__VA_ARGS__)
terom@1: #else
terom@40: #define INFO(...) debug_dummy(0, __VA_ARGS__)
terom@40: #define INFON(...) debug_dummy(0, __VA_ARGS__)
terom@1: #endif
terom@1: 
terom@8: #endif /* LIB_LOG_H */