debug.c

   1 /*
   2  * Copyright 2004-2005 Timo Hirvonen
   3  */
   4
   5 #include <debug.h>
   6 #include <prog.h>
   7
   8 #include <stdio.h>
   9 #include <stdarg.h>
  10
  11 #if DEBUG > 1
  12 static FILE *debug_stream = NULL;
  13 #endif
  14
  15 void debug_init(void)
  16 {
  17 #if DEBUG > 1
  18         const char *debug_filename = "/tmp/cmus-debug";
  19
  20         debug_stream = fopen(debug_filename, "w");
  21         if (debug_stream == NULL)
  22                 die_errno("error opening `%s' for writing", debug_filename);
  23 #endif
  24 }
  25
  26 /* This function must be defined even if debugging is disabled in the program
  27  * because debugging might still be enabled in some plugin.
  28  */
  29 void __debug_bug(const char *function, const char *fmt, ...)
  30 {
  31         const char *format = "\n%s: BUG: ";
  32         va_list ap;
  33
  34         /* debug_stream exists only if debugging is enabled */
  35 #if DEBUG > 1
  36         fprintf(debug_stream, format, function);
  37         va_start(ap, fmt);
  38         vfprintf(debug_stream, fmt, ap);
  39         va_end(ap);
  40 #endif
  41
  42         /* always print bug message to stderr */
  43         fprintf(stderr, format, function);
  44         va_start(ap, fmt);
  45         vfprintf(stderr, fmt, ap);
  46         va_end(ap);
  47         exit(127);
  48 }
  49
  50 void __debug_print(const char *function, const char *fmt, ...)
  51 {
  52 #if DEBUG > 1
  53         va_list ap;
  54
  55         fprintf(debug_stream, "%s: ", function);
  56         va_start(ap, fmt);
  57         vfprintf(debug_stream, fmt, ap);
  58         va_end(ap);
  59         fflush(debug_stream);
  60 #endif
  61 }