client.h: Added ERROR and new DEBUG defines

These definitions will be used to facilitate the identification of messages.

Signed-off-by: Erik Alexandre Pucci <eap08@c3sl.ufpr.br>
Acked-by: Ricardo Tavares de Oliveira <rto07@c3sl.ufpr.br>
Signed-off-by: Danilo K. S. Yorinori <danilok@c3sl.ufpr.br>

src/client.h

@@ -38,6 +38,16 @@
 #define DEBUG 0
 /* 5 minutes before timeout */
 #define TIMEOUT 300
+// Print ERROR messages
+#define ERROR(fmt, args...) ( fprintf(stderr, fmt, ##args), \
+                              fflush(stderr) )
+// Print DEBUG messages, if DEBUGFLAG is "true"
+#ifdef DEBUGFLAG
+    #define DEBUG(fmt, args...) ( printf("DEBUG: "fmt"", ##args), \
+                                  fflush(stdout) )
+#else
+    #define DEBUG(fmt, args...)
+#endif
 
 /* Statics strings */
 static const char *exe = "bin/client";