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<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Boost.Integer</title> <link rel="stylesheet" href="../../../../doc/src/boostbook.css" type="text/css"> <meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> <link rel="home" href="index.html" title="Boost.Integer"> <link rel="next" href="boost_integer/traits.html" title="Integer Traits"> </head> <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> <table cellpadding="2" width="100%"><tr> <td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../boost.png"></td> <td align="center"><a href="../../../../index.html">Home</a></td> <td align="center"><a href="../../../../libs/libraries.htm">Libraries</a></td> <td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> <td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> <td align="center"><a href="../../../../more/index.htm">More</a></td> </tr></table> <hr> <div class="spirit-nav"><a accesskey="n" href="boost_integer/traits.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a></div> <div class="article"> <div class="titlepage"> <div> <div><h2 class="title"> <a name="boost_integer"></a>Boost.Integer</h2></div> <div><div class="authorgroup"> <div class="author"><h3 class="author"> <span class="firstname">Beman</span> <span class="surname">Dawes</span> </h3></div> <div class="author"><h3 class="author"> <span class="firstname">Daryle</span> <span class="surname">Walker</span> </h3></div> <div class="author"><h3 class="author"> <span class="firstname">Gennaro</span> <span class="surname">Prota</span> </h3></div> <div class="author"><h3 class="author"> <span class="firstname">John</span> <span class="surname">Maddock</span> </h3></div> </div></div> <div><p class="copyright">Copyright © 2001-2009 Beman Dawes, Daryle Walker, Gennaro Prota, John Maddock</p></div> <div><div class="legalnotice"> <a name="boost_integer.legal"></a><p> Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) </p> </div></div> </div> <hr> </div> <div class="toc"> <p><b>Table of Contents</b></p> <dl class="toc"> <dt><span class="section"><a href="index.html#boost_integer.overview">Overview</a></span></dt> <dt><span class="section"><a href="boost_integer/traits.html">Integer Traits</a></span></dt> <dt><span class="section"><a href="boost_integer/integer.html">Integer Type Selection</a></span></dt> <dt><span class="section"><a href="boost_integer/gcd_lcm.html">Greatest Common Divisor and Least Common Multiple</a></span></dt> <dt><span class="section"><a href="boost_integer/extended_euclidean.html">Extended Euclidean Algorithm</a></span></dt> <dt><span class="section"><a href="boost_integer/mod_inverse.html">Modular Multiplicative Inverse</a></span></dt> <dt><span class="section"><a href="boost_integer/mask.html">Integer Masks</a></span></dt> <dt><span class="section"><a href="boost_integer/log2.html">Compile Time log2 Calculation</a></span></dt> <dt><span class="section"><a href="boost_integer/minmax.html">Compile time min/max calculation</a></span></dt> <dt><span class="section"><a href="boost_integer/history.html">History</a></span></dt> <dt><span class="section"><a href="boost_integer/cstdint.html">Removed from library: Standard Integer Types</a></span></dt> </dl> </div> <div class="section"> <div class="titlepage"><div><div><h2 class="title" style="clear: both"> <a name="boost_integer.overview"></a><a class="link" href="index.html#boost_integer.overview" title="Overview">Overview</a> </h2></div></div></div> <p> Boost.Integer provides integer type support, particularly helpful in generic programming. It provides the means to select an integer type based upon its properties, like the number of bits or the maximum supported value, as well as compile-time bit mask selection. There is a derivative of std::numeric_limits that provides integral constant expressions for <code class="computeroutput"><span class="identifier">min</span></code> and <code class="computeroutput"><span class="identifier">max</span></code>. Finally, it provides two compile-time algorithms: determining the highest power of two in a compile-time value; and computing min and max of constant expressions. </p> <div class="informaltable"><table class="table"> <colgroup> <col> <col> <col> </colgroup> <thead><tr> <th> <p> Component </p> </th> <th> <p> Header </p> </th> <th> <p> Purpose </p> </th> </tr></thead> <tbody> <tr> <td> <p> Forward Declarations. </p> </td> <td> <p> <code class="literal"><a href="../../../../boost/integer_fwd.hpp" target="_top"><boost/integer_fwd.hpp></a></code> </p> </td> <td> <p> Forward declarations of classes and class templates - for use when just the name of a class is needed. </p> </td> </tr> <tr> <td> <p> <a class="link" href="boost_integer/traits.html" title="Integer Traits">Integer Traits</a>. </p> </td> <td> <p> <code class="literal"><a href="../../../../boost/integer_traits.hpp" target="_top"><boost/integer_traits.hpp></a></code> </p> </td> <td> <p> Class template <code class="literal">boost::integer_traits</code>, derives from <code class="literal">std::numeric_limits</code> and adds <code class="literal">const_min</code> and <code class="literal">const_max</code> members. </p> </td> </tr> <tr> <td> <p> <a class="link" href="boost_integer/integer.html" title="Integer Type Selection">Integer Type Selection</a>. </p> </td> <td> <p> <code class="literal"><a href="../../../../boost/integer.hpp" target="_top"><boost/integer.hpp></a></code> </p> </td> <td> <p> Templates for integer type selection based on properties such as maximum value or number of bits: Use to select the type of an integer when some property such as maximum value or number of bits is known. Useful for generic programming. </p> </td> </tr> <tr> <td> <p> <a class="link" href="boost_integer/gcd_lcm.html" title="Greatest Common Divisor and Least Common Multiple">Greatest Common Divisor and Least Common Multiple</a>. </p> </td> <td> <p> <code class="literal"><a href="../../../../boost/integer/common_factor_rt.hpp" target="_top"><boost/integer/common_factor_rt.hpp></a></code> and <code class="literal"><a href="../../../../boost/integer/common_factor_ct.hpp" target="_top"><boost/integer/common_factor_ct.hpp></a></code> </p> </td> <td> <p> Functions <code class="computeroutput"><span class="identifier">gcd</span></code> and <code class="computeroutput"><span class="identifier">lcm</span></code> plus function objects and compile time versions. </p> </td> </tr> <tr> <td> <p> <a class="link" href="boost_integer/mask.html" title="Integer Masks">Integer Masks</a>. </p> </td> <td> <p> <code class="literal"><a href="../../../../boost/integer/integer_mask.hpp" target="_top"><boost/integer/integer_mask.hpp></a></code> </p> </td> <td> <p> Templates for the selection of integer masks, single or lowest group, based on the number of bits: Use to select a particular mask when the bit position(s) are based on a compile-time variable. Useful for generic programming. </p> </td> </tr> <tr> <td> <p> <a class="link" href="boost_integer/log2.html" title="Compile Time log2 Calculation">Compile time log2 Calculation</a>. </p> </td> <td> <p> <code class="literal"><a href="../../../../boost/integer/static_log2.hpp" target="_top"><boost/integer/static_log2.hpp></a></code> </p> </td> <td> <p> Template for finding the highest power of two in a number: Use to find the bit-size/range based on a maximum value. Useful for generic programming. </p> </td> </tr> <tr> <td> <p> <a class="link" href="boost_integer/minmax.html" title="Compile time min/max calculation">Compile time min/max calculation</a>. </p> </td> <td> <p> <code class="literal"><a href="../../../../boost/integer/static_min_max.hpp" target="_top"><boost/integer/static_min_max.hpp></a></code> </p> </td> <td> <p> Templates for finding the extrema of two numbers: Use to find a bound based on a minimum or maximum value. Useful for generic programming. </p> </td> </tr> <tr> <td> <p> <a class="link" href="boost_integer/extended_euclidean.html" title="Extended Euclidean Algorithm">Extended Euclidean algorithm</a>. </p> </td> <td> <p> <code class="literal"><a href="../../../../boost/integer/extended_euclidean.hpp" target="_top"><boost/integer/extended_euclidean.hpp></a></code> </p> </td> <td> <p> Solves <span class="emphasis"><em>mx + ny = gcd(x,y)</em></span> for <span class="emphasis"><em>x</em></span> and <span class="emphasis"><em>y</em></span>. </p> </td> </tr> <tr> <td> <p> <a class="link" href="boost_integer/mod_inverse.html" title="Modular Multiplicative Inverse">Modular multiplicative inverse</a>. </p> </td> <td> <p> <code class="literal"><a href="../../../../boost/integer/mod_inverse.hpp" target="_top"><boost/integer/mod_inverse.hpp></a></code> </p> </td> <td> <p> Given <span class="emphasis"><em>a</em></span> and <span class="emphasis"><em>m</em></span>, solves <span class="emphasis"><em>ax</em></span> = 1 mod <span class="emphasis"><em>m</em></span> for <span class="emphasis"><em>x</em></span>. </p> </td> </tr> </tbody> </table></div> </div> </div> <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> <td align="left"><p><small>Last revised: August 11, 2020 at 15:00:14 GMT</small></p></td> <td align="right"><div class="copyright-footer"></div></td> </tr></table> <hr> <div class="spirit-nav"><a accesskey="n" href="boost_integer/traits.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a></div> </body> </html>