git.squeep.com Git - lemu/blob - notify.c

   1 #define _GNU_SOURCE 1
   2
   3 #include <stdlib.h>
   4 #include <stdio.h>
   5 #include <stdarg.h>
   6 #include <string.h>
   7 #include <errno.h>
   8
   9 #include "notify.h"
  10
  11 /*
  12  * Generic console notifier.
  13  */
  14
  15 static void
  16 notify_fn_default_(int level, const char * func_name, const char * fmt, ...)
  17 {
  18         FILE  *f = (level <= 1) ? stderr : stdout;
  19         static const char * const levels[] = { "FATAL", "ERROR", "INFO", "DEBUG" };
  20         const int levels_num = sizeof levels / sizeof *levels;
  21         va_list ap;
  22
  23         flockfile(f);
  24
  25         fputs_unlocked((func_name && *func_name) ? func_name : "[null]", f);
  26         fputs_unlocked(": --", f);
  27         if (level >= 0
  28         &&  level <= levels_num) {
  29                 fputs_unlocked(levels[level], f);
  30         } else {
  31                 fprintf(f, "%d", level);
  32         }
  33         fputs_unlocked("-- ", f);
  34
  35         va_start(ap, fmt);
  36         vfprintf(f, fmt, ap);
  37         va_end(ap);
  38
  39         fputc_unlocked('\n', f);
  40         fflush_unlocked(f);
  41
  42         funlockfile(f);
  43
  44 }
  45
  46 void (* notify_fn)(int level, const char *func_name, const char *msg, ...) __attribute__((format(printf, 3, 4))) = notify_fn_default_;
  47
  48 void
  49 notify_fn_set(void (* fn)(int level, const char *func_name, const char *fmt, ...))
  50 {
  51         notify_fn = fn;
  52 }