void svprintf(char *keyname, size_t keylen, int keytype, const char *format,...) __attribute__((__format__(__printf__,4,5)));
void SVPRINTF(char *keyname, int keytype, const char *format,...) __attribute__((__format__(__printf__,3,4)));
void SVCALLBACK(char *keyname, var_callback_fptr fcn_ptr);
void svprintf(char *keyname, size_t keylen, int keytype, const char *format,...) __attribute__((__format__(__printf__,4,5)));
void SVPRINTF(char *keyname, int keytype, const char *format,...) __attribute__((__format__(__printf__,3,4)));
void SVCALLBACK(char *keyname, var_callback_fptr fcn_ptr);