A Discrete-Event Network Simulator
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int64x64.h
Go to the documentation of this file.
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/*
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* Copyright (c) 2010 INRIA
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*
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* SPDX-License-Identifier: GPL-2.0-only
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*/
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#ifndef INT64X64_H
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#define INT64X64_H
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#include "ns3/core-config.h"
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// Order is important here, as it determines which implementation
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// will generate doxygen API docs. This order mimics the
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// selection logic in CMakeLists.txt, so we generate docs from the
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// implementation actually chosen by the configuration.
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#if defined(INT64X64_USE_128) && !defined(PYTHON_SCAN)
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#include "
int64x64-128.h
"
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#elif defined(INT64X64_USE_CAIRO) && !defined(PYTHON_SCAN)
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#include "
int64x64-cairo.h
"
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#elif defined(INT64X64_USE_DOUBLE) || defined(PYTHON_SCAN)
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#include "
int64x64-double.h
"
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#endif
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#include <iostream>
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/**
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* @file
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* @ingroup highprec
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* Declaration of the ns3::int64x64_t type and associated operators.
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*/
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namespace
ns3
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{
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/**
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* @ingroup core
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* @defgroup highprec High Precision Q64.64
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*
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* Functions and class for high precision Q64.64 fixed point arithmetic.
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*
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* A Q64.64 fixed precision number consists of:
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*
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* Bits | Function
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* ---- | --------
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* 1 | Sign bit
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* 63 | Integer portion
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* 64 | Fractional portion
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*
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* The `high` word consists of the sign bit and integer value;
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* the `low` word is the fractional part, unscaled.
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*
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* All standard arithmetic operations are supported:
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*
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* Category | Operators
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* ----------- | ---------
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* Computation | `+`, `+=`, `-`, `-=`, `*`, `*=`, `/`, `/=`
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* Comparison | `==`, `!=`, `<`, `<=`, `>`, `>=`
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* Unary | `+`, `-`, `!`
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*/
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/**
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* @ingroup highprec
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* @class int64x64_t
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*
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* High precision numerical type, implementing Q64.64 fixed precision.
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*/
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/**
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* @ingroup highprec
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* Addition operator.
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* @param [in] lhs Left hand argument
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* @param [in] rhs Right hand argument
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* @return The result of the operator.
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*/
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inline
int64x64_t
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operator+
(
const
int64x64_t
& lhs,
const
int64x64_t
& rhs)
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{
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int64x64_t
tmp = lhs;
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tmp += rhs;
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return
tmp;
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}
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/**
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* @ingroup highprec
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* Subtraction operator.
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* @param [in] lhs Left hand argument
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* @param [in] rhs Right hand argument
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* @return The result of the operator.
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*/
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inline
int64x64_t
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operator-
(
const
int64x64_t
& lhs,
const
int64x64_t
& rhs)
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{
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int64x64_t
tmp = lhs;
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tmp -= rhs;
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return
tmp;
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}
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/**
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* @ingroup highprec
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* Multiplication operator.
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* @param [in] lhs Left hand argument
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* @param [in] rhs Right hand argument
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* @return The result of the operator.
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*/
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inline
int64x64_t
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operator*
(
const
int64x64_t
& lhs,
const
int64x64_t
& rhs)
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{
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int64x64_t
tmp = lhs;
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tmp *= rhs;
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return
tmp;
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}
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/**
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* @ingroup highprec
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* Division operator.
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* @param [in] lhs Left hand argument
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* @param [in] rhs Right hand argument
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* @return The result of the operator.
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*/
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inline
int64x64_t
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operator/
(
const
int64x64_t
& lhs,
const
int64x64_t
& rhs)
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{
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int64x64_t
tmp = lhs;
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tmp /= rhs;
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return
tmp;
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}
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/**
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* @ingroup highprec
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* Inequality operator
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* @param [in] lhs Left hand argument
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* @param [in] rhs Right hand argument
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* @return The result of the operator.
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*/
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inline
bool
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operator!=
(
const
int64x64_t
& lhs,
const
int64x64_t
& rhs)
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{
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return
!(lhs == rhs);
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}
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/**
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* @ingroup highprec
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* Less or equal operator.
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* @param [in] lhs Left hand argument
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* @param [in] rhs Right hand argument
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* @return The result of the operator.
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*/
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inline
bool
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operator<=
(
const
int64x64_t
& lhs,
const
int64x64_t
& rhs)
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{
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return
!(lhs > rhs);
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}
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/**
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* @ingroup highprec
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* Greater or equal operator.
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* @param [in] lhs Left hand argument
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* @param [in] rhs Right hand argument
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* @return The result of the operator.
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*/
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inline
bool
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operator>=
(
const
int64x64_t
& lhs,
const
int64x64_t
& rhs)
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{
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return
!(lhs < rhs);
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}
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/**
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* @ingroup highprec
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* Output streamer for int64x64_t.
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*
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* Values are printed with the following format flags
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* (independent of the stream flags):
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* - `showpos`
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* - `left`
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*
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* The stream `width` is ignored. If `floatfield` is set,
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* `precision` decimal places are printed. If `floatfield` is not set,
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* all digits of the fractional part are printed, up to the
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* representation limit of 20 digits; trailing zeros are omitted.
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*
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* @param [in,out] os The output stream.
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* @param [in] value The numerical value to print.
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* @returns The stream.
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*/
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std::ostream&
operator<<
(std::ostream& os,
const
int64x64_t& value);
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/**
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* @ingroup highprec
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* Input streamer for int64x64_t.
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*
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* @param [in,out] is The input stream.
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* @param [out] value The numerical value to set.
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* @returns The stream.
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*/
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std::istream&
operator>>
(std::istream& is, int64x64_t& value);
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/**
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* @ingroup highprec
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* Absolute value.
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* @param [in] value The value to operate on.
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* @return The absolute value of \pname{value}.
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*/
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inline
int64x64_t
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Abs
(
const
int64x64_t
& value)
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{
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return
(value < 0) ? -value : value;
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}
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/**
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* @ingroup highprec
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* Minimum.
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*
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* @param [in] a The first value.
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* @param [in] b The second value.
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* @return The smaller of the arguments.
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*/
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inline
int64x64_t
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Min
(
const
int64x64_t
& a,
const
int64x64_t
& b)
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{
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return
(a < b) ? a : b;
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}
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/**
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* @ingroup highprec
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* Maximum.
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*
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* @param [in] a The first value.
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* @param [in] b The second value.
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* @return The larger of the arguments.
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*/
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inline
int64x64_t
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Max
(
const
int64x64_t
& a,
const
int64x64_t
& b)
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{
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return
(a > b) ? a : b;
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}
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}
// namespace ns3
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#endif
/* INT64X64_H */
Max
#define Max(a, b)
Definition
aarf-wifi-manager.cc:15
Min
#define Min(a, b)
Definition
aarf-wifi-manager.cc:14
ns3::int64x64_t
High precision numerical type, implementing Q64.64 fixed precision.
Definition
int64x64-double.h:34
ns3::operator/
int64x64_t operator/(const int64x64_t &lhs, const int64x64_t &rhs)
Division operator.
Definition
int64x64.h:121
ns3::operator>=
bool operator>=(const int64x64_t &lhs, const int64x64_t &rhs)
Greater or equal operator.
Definition
int64x64.h:162
ns3::operator<=
bool operator<=(const int64x64_t &lhs, const int64x64_t &rhs)
Less or equal operator.
Definition
int64x64.h:149
ns3::operator-
int64x64_t operator-(const int64x64_t &lhs, const int64x64_t &rhs)
Subtraction operator.
Definition
int64x64.h:91
ns3::operator+
int64x64_t operator+(const int64x64_t &lhs, const int64x64_t &rhs)
Addition operator.
Definition
int64x64.h:76
ns3::Abs
int64x64_t Abs(const int64x64_t &value)
Absolute value.
Definition
int64x64.h:203
ns3::operator*
int64x64_t operator*(const int64x64_t &lhs, const int64x64_t &rhs)
Multiplication operator.
Definition
int64x64.h:106
int64x64-128.h
Declaration of the ns3::int64x64_t type using a native int128_t type.
int64x64-cairo.h
Using the ns3::int64x64_t based on Cairo 128-bit integers.
int64x64-double.h
Using the ns3::int64x64_t based on double values.
ns3
Every class exported by the ns3 library is enclosed in the ns3 namespace.
ns3::operator!=
bool operator!=(Callback< R, Args... > a, Callback< R, Args... > b)
Inequality test.
Definition
callback.h:658
ns3::operator<<
std::ostream & operator<<(std::ostream &os, const Angles &a)
Definition
angles.cc:148
ns3::operator>>
std::istream & operator>>(std::istream &is, Angles &a)
Definition
angles.cc:172
src
core
model
int64x64.h
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