/*
  * arbitrary precision integers
  * Copyright (c) 2004 Michael Niedermayer <michaelni@gmx.at>
  *

  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or

  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either

  * version 2.1 of the License, or (at your option) any later version.

  *

  * FFmpeg is distributed in the hope that it will be useful,

  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public

  * License along with FFmpeg; if not, write to the Free Software

  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  */

 /**

  * @file

  * arbitrary precision integers
  * @author Michael Niedermayer <michaelni@gmx.at>
  */

 #ifndef AVUTIL_INTEGER_H
 #define AVUTIL_INTEGER_H

 #include <stdint.h>

 #include "common.h"

 #define AV_INTEGER_SIZE 8
 
 typedef struct AVInteger{

     uint16_t v[AV_INTEGER_SIZE];

 } AVInteger;
 

 AVInteger av_add_i(AVInteger a, AVInteger b) av_const;
 AVInteger av_sub_i(AVInteger a, AVInteger b) av_const;

 
 /**

  * Return the rounded-down value of the base 2 logarithm of the given

  * AVInteger. This is simply the index of the most significant bit
  * which is 1, or 0 if all bits are 0.

  */

 int av_log2_i(AVInteger a) av_const;
 AVInteger av_mul_i(AVInteger a, AVInteger b) av_const;

 
 /**

  * Return 0 if a==b, 1 if a>b and -1 if a<b.

  */

 int av_cmp_i(AVInteger a, AVInteger b) av_const;

 
 /**

  * bitwise shift
  * @param s the number of bits by which the value should be shifted right,
             may be negative for shifting left

  */

 AVInteger av_shr_i(AVInteger a, int s) av_const;

 
 /**

  * Return a % b.

  * @param quot a/b will be stored here.

  */

 AVInteger av_mod_i(AVInteger *quot, AVInteger a, AVInteger b);

 
 /**

  * Return a/b.

  */

 AVInteger av_div_i(AVInteger a, AVInteger b) av_const;

 
 /**

  * Convert the given int64_t to an AVInteger.

  */

 AVInteger av_int2i(int64_t a) av_const;

 
 /**

  * Convert the given AVInteger to an int64_t.

  * If the AVInteger is too large to fit into an int64_t,
  * then only the least significant 64 bits will be used.

  */

 int64_t av_i2int(AVInteger a) av_const;

 #endif /* AVUTIL_INTEGER_H */