integer.c File Reference

#include <string.h>
#include "integer.h"
#include "avassert.h"
#include "intmath.h"

Go to the source code of this file.

Functions
AVInteger	av_add_i (AVInteger a, AVInteger b)
AVInteger	av_sub_i (AVInteger a, AVInteger b)
int	av_log2_i (AVInteger a)
	Return the rounded-down value of the base 2 logarithm of the given AVInteger. More...
AVInteger	av_mul_i (AVInteger a, AVInteger b)
int	av_cmp_i (AVInteger a, AVInteger b)
	Return 0 if a==b, 1 if a>b and -1 if a<b. More...
AVInteger	av_shr_i (AVInteger a, int s)
	bitwise shift More...
AVInteger	av_mod_i (AVInteger *quot, AVInteger a, AVInteger b)
	Return a % b. More...
AVInteger	av_div_i (AVInteger a, AVInteger b)
	Return a/b. More...
AVInteger	av_int2i (int64_t a)
	Convert the given int64_t to an AVInteger. More...
int64_t	av_i2int (AVInteger a)
	Convert the given AVInteger to an int64_t. More...

Variables
static const AVInteger	zero_i

Detailed Description

arbitrary precision integers

Author

Michael Niedermayer micha.nosp@m.elni.nosp@m.@gmx..nosp@m.at

Definition in file integer.c.

Function Documentation

av_add_i()

AVInteger av_add_i	(	AVInteger	a,
		AVInteger	b
	)

Definition at line 36 of file integer.c.

Referenced by av_rescale_rnd(), and main().

av_sub_i()

AVInteger av_sub_i	(	AVInteger	a,
		AVInteger	b
	)

Definition at line 46 of file integer.c.

Referenced by av_mod_i(), and main().

av_log2_i()

int av_log2_i

(

AVInteger

a

)

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.

Definition at line 56 of file integer.c.

Referenced by av_mod_i(), av_mul_i(), and main().

av_mul_i()

AVInteger av_mul_i	(	AVInteger	a,
		AVInteger	b
	)

Definition at line 66 of file integer.c.

Referenced by av_rescale_rnd(), and main().

av_cmp_i()

int av_cmp_i	(	AVInteger	a,
		AVInteger	b
	)

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

Definition at line 87 of file integer.c.

Referenced by av_mod_i(), and main().

av_shr_i()

AVInteger av_shr_i	(	AVInteger	a,
		int	s
	)		const

bitwise shift

Parameters

s	the number of bits by which the value should be shifted right, may be negative for shifting left

Definition at line 99 of file integer.c.

Referenced by av_mod_i(), and main().

av_mod_i()

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

Return a % b.

Parameters

quot	a/b will be stored here.

Definition at line 113 of file integer.c.

Referenced by av_div_i(), and av_mod_i().

av_div_i()

AVInteger av_div_i	(	AVInteger	a,
		AVInteger	b
	)

Return a/b.

Definition at line 143 of file integer.c.

Referenced by av_rescale_rnd(), and main().

av_int2i()

AVInteger av_int2i

(

int64_t

a

)

Convert the given int64_t to an AVInteger.

Definition at line 149 of file integer.c.

Referenced by av_rescale_rnd(), and main().

av_i2int()

int64_t av_i2int

(

AVInteger

a

)

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.

Definition at line 160 of file integer.c.

Referenced by av_rescale_rnd(), and main().

Variable Documentation

zero_i

const AVInteger zero_i

static

Definition at line 34 of file integer.c.

Referenced by av_mod_i().