Added fprintf function.

bacnet-stack/include/debug.h

@@ -40,9 +40,11 @@
 #include "bacdef.h"
 
 #if DEBUG_ENABLED
-void debug_printf(char *fmt, ...);
+void debug_printf(const char * format, ...);
+void debug_fprintf(FILE * stream, const char * format, ...)
 #else
-static void debug_printf(char *fmt, ...) {}
+static void debug_printf(const char * format, ...) {}
+static void debug_fprintf(FILE * stream, const char * format, ...) {}
 #endif
 
 #endif

bacnet-stack/src/debug.c

@@ -38,14 +38,26 @@
 #include <stdlib.h>             /* Standard Library */
 #include <stdarg.h>
 
-void debug_printf(char *fmt, ...)
+void debug_printf(const char * format, ...)
 {
     va_list ap;
 
-    va_start(ap, fmt);
-    vfprintf(stdout, fmt, ap);
+    va_start(ap, format);
+    vfprintf(stdout, format, ap);
     va_end(ap);
     fflush(stdout);
 
     return;
 }
+
+void debug_fprintf(FILE * stream, const char * format, ...)
+{
+    va_list ap;
+
+    va_start(ap, format);
+    vfprintf(stream, format, ap);
+    va_end(ap);
+    fflush(stream);
+
+    return;
+}