Debug.h

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#ifndef __DEBUG_H__
#define __DEBUG_H__

#ifdef __cplusplus
extern "C" {
#endif

#include <stdio.h>

void debugInit(int* argc, const char* argv[]);

void debugToFile(const char* fileName);

void debugClose(void);

extern int debugLevel;

extern FILE* debugFile;

#ifdef DEBUG
#define DEBUG_ENABLED 1  // debug code available at runtime
#else

#define DEBUG_ENABLED 0  // all debug code optimized out
#endif 

#define HERE debug("HERE")

#define debugV(name) #name,(name)

#define vDebug(fmt, name) debug("%s=(" fmt ")" , debugV(name))

#define debug(fmt, ...) lDebug(1, fmt, ##__VA_ARGS__)

#define lDebug(level, fmt, ...) \
  do { \
    if (DEBUG_ENABLED && (debugLevel >= level)) \
      fprintf((debugFile ? debugFile : stderr), "DEBUG %s[%d] %s() " fmt "\n", \
               __FILE__, __LINE__, __func__, ##__VA_ARGS__); \
  } while(0)

#ifdef __cplusplus
}
#endif

#endif