cutils.h

/*
 * C utilities
 * 
 * Copyright (c) 2016 Fabrice Bellard
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
#ifndef CUTILS_H
#define CUTILS_H

#define likely(x)       __builtin_expect(!!(x), 1)
#define unlikely(x)     __builtin_expect(!!(x), 0)
#define force_inline inline __attribute__((always_inline))
#define no_inline __attribute__((noinline))

#define xglue(x, y) x ## y
#define glue(x, y) xglue(x, y)
#define stringify(s)    tostring(s)
#define tostring(s)     #s

#ifndef offsetof
#define offsetof(type, field) ((size_t) &((type *)0)->field)
#endif
#define countof(x) (sizeof(x) / sizeof(x[0]))

#ifndef _BOOL_defined
#define _BOOL_defined
#undef FALSE
#undef TRUE

typedef int BOOL;
enum {
    FALSE = 0,
    TRUE = 1,
};
#endif

/* this test works at least with gcc */
#if defined(__SIZEOF_INT128__)
#define HAVE_INT128
#endif

#ifdef HAVE_INT128
typedef __int128 int128_t;
typedef unsigned __int128 uint128_t;
#endif

static inline int max_int(int a, int b)
{
    if (a > b)
        return a;
    else
        return b;
}

static inline int min_int(int a, int b)
{
    if (a < b)
        return a;
    else
        return b;
}

#endif /* CUTILS_H */