ac_util.hpp

/*
  Copyright (c) 2014 CloudFlare, Inc. All rights reserved.

  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions are
  met:

     * Redistributions of source code must retain the above copyright
  notice, this list of conditions and the following disclaimer.
     * Redistributions in binary form must reproduce the above
  copyright notice, this list of conditions and the following disclaimer
  in the documentation and/or other materials provided with the
  distribution.
     * Neither the name of CloudFlare, Inc. nor the names of its
  contributors may be used to endorse or promote products derived from
  this software without specific prior written permission.

  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef AC_UTIL_H
#define AC_UTIL_H

#ifdef DEBUG
#include <stdio.h>   // for fprintf
#include <stdlib.h>  // for abort
#endif

typedef unsigned short uint16;
typedef unsigned int uint32;
typedef unsigned long uint64;
typedef unsigned char InputTy;

#ifdef DEBUG
    // Usage examples: ASSERT(a > b),  ASSERT(foo() && "Opps, foo() reutrn 0");
    #define ASSERT(c) if (!(c))\
        { fprintf(stderr, "%s:%d Assert: %s\n", __FILE__, __LINE__, #c); abort(); }
#else
    #define ASSERT(c) ((void)0)
#endif

#define likely(x)   __builtin_expect((x),1)
#define unlikely(x) __builtin_expect((x),0)

#define offsetof(st, m) ((size_t)(&((st *)0)->m))

typedef enum {
    IMPL_SLOW_VARIANT = 1,
    IMPL_FAST_VARIANT = 2,
} impl_var_t;

#define AC_MAGIC_NUM 0x5a
typedef struct {
    unsigned char magic_num;
    unsigned char impl_variant;
} buf_header_t;

#endif //AC_UTIL_H