debug.c

   1 #ifdef NDEBUG
   2 static void debug(const char *errstr, ...) { }
   3 static void print_packet(const char *prefix, Packet *pkt) { }
   4 #else
   5
   6 static void debug(const char *errstr, ...) {
   7         va_list ap;
   8         va_start(ap, errstr);
   9         vfprintf(stderr, errstr, ap);
  10         va_end(ap);
  11 }
  12
  13 static void print_packet(const char *prefix, Packet *pkt) {
  14         static const char *msgtype[] = {
  15                 [MSG_CONTENT] = "CONTENT",
  16                 [MSG_ATTACH]  = "ATTACH",
  17                 [MSG_DETACH]  = "DETACH",
  18                 [MSG_RESIZE]  = "RESIZE",
  19                 [MSG_REDRAW]  = "REDRAW",
  20                 [MSG_EXIT]    = "EXIT",
  21         };
  22         const char *type = "UNKNOWN";
  23         if (pkt->type < countof(msgtype) && msgtype[pkt->type])
  24                 type = msgtype[pkt->type];
  25
  26         fprintf(stderr, "%s: %s ", prefix, type);
  27         switch (pkt->type) {
  28         case MSG_CONTENT:
  29                 fwrite(pkt->u.msg, pkt->len, 1, stderr);
  30                 break;
  31         case MSG_RESIZE:
  32                 fprintf(stderr, "%dx%d", pkt->u.ws.ws_col, pkt->u.ws.ws_row);
  33                 break;
  34         case MSG_ATTACH:
  35                 fprintf(stderr, "readonly: %d low-priority: %d",
  36                         pkt->u.i & CLIENT_READONLY,
  37                         pkt->u.i & CLIENT_LOWPRIORITY);
  38                 break;
  39         default:
  40                 fprintf(stderr, "len: %zu", pkt->len);
  41                 break;
  42         }
  43         fprintf(stderr, "\n");
  44 }
  45
  46 #endif /* NDEBUG */