/**************************************************************
 *
 * File: debug.h
 * Author: Steve Wolfman
 *
 * Description: This file contains the declaration for the
 * debug_printf command used in CSE142. This command allows students
 * to leave debugging statements in the code even at submission time
 * because the debug_printf statements become empty statements in
 * release mode.
 *
 **************************************************************/

/* If this file has been touched before, fix things up to allow it to
   be touched again. */
#ifdef __DEBUG_H
#undef debug_printf
#endif /* __DEBUG_H */


/* Define debug_printf to do nothing if NDEBUG is defined.  If NDEBUG
   is defined, it means no debugging information should be
   provided. This is the same constant used to control assert
   statements. */
#ifdef NDEBUG

/* Prototype for empty_debug only needed if NDEBUG is defined. */
/* Does nothing but return 0. */
int empty_debug(const char *format, ...);

/* Make debug_printf become a null call. */
#define debug_printf empty_debug

#else

/* debug_printf acts just like printf. This actually *makes* it
   printf. */
#define debug_printf printf

#endif /* NDEBUG */