ccore/include/core/Check.h

#ifndef CORE_CHECK_H
#define CORE_CHECK_H

#if defined(__GNUC__)
#define check_format(format_index, arg_start_index)                            \
    __attribute__((format(printf, format_index, arg_start_index)))
#else
#error "please add a 'check_format' option"
#endif

#if defined(__GNUC__)
#define likely(x) __builtin_expect(!!(x), 1)
#define unlikely(x) __builtin_expect(!!(x), 0)
#else
#define likely(x) x
#define unlikely(x) x
#endif

#endif