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148 lines
6.8 KiB
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
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<title>Boost Integer Library</title>
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<body bgcolor="white" text="black">
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<table border="1" bgcolor="teal" cellpadding="2">
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<td bgcolor="white"><img src="../../boost.png" alt="boost.png (6897 bytes)" width="277" height="86"></td>
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<td><a href="../../index.htm"><font face="Arial" color="white"><big>Home</big></font></a></td>
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<td><a href="../libraries.htm"><font face="Arial" color="white"><big>Libraries</big></font></a></td>
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<h1>Boost Integer Library</h1>
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<table border="1" cellpadding="5">
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<tr>
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<th>Header / Docs</th>
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<th>Contents</th>
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<th>Use</th>
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<tr>
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<td align="center"><cite><a href="../../boost/integer_fwd.hpp"><boost/integer_fwd.hpp></a></cite></td>
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<td valign="top">Forward declarations of classes and class templates</td>
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<td valign="top">When just the name of a class is needed</td>
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</tr>
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<tr>
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<td align="center"><code><a href="../../boost/cstdint.hpp"><boost/cstdint.hpp><br>
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</a></code><a href="cstdint.htm"><br>
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documentation</a>
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</td>
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<td valign="top">Typedef's based on the 1999 C Standard header <<code>stdint.h></code>, wrapped in namespace boost.
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This implementation may #include the compiler
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supplied <<code>stdint.h></code>, if present. </td>
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<td valign="top">Supplies typedefs for standard integer types such as <code> int32_t</code> or <code>uint_least16_t</code>.
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Use in preference to <<code>stdint.h></code>
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for enhanced portability. Furthermore, all names are safely placed in the boost namespace.</td>
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</tr>
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<tr>
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<td align="center"><code><a href="../../boost/integer_traits.hpp"><boost/integer_traits.hpp></a></code><br>
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<br>
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<a href="integer_traits.html">documentation</a>
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</td>
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<td valign="top">Template class <code>boost::integer_traits</code>, derived from <code>std::numeric_limits</code>.
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Adds <code>const_min</code> and <code>const_max</code> members.</td>
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<td valign="top">Use to obtain the characteristics of a known integer type.</td>
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</tr>
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<tr>
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<td align="center"><code><a href="../../boost/integer.hpp"><boost/integer.hpp></a><br>
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<br>
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</code><a href="integer.htm">documentation</a></td>
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<td valign="top">Templates for integer type selection based on properties such as
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maximum value or number of bits.</td>
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<td valign="top">Use to select the type an integer when some property such as maximum value or number of bits is known.
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Useful for generic programming. </td>
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</tr>
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<tr>
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<td align="center"><code><a href="../../boost/integer/integer_mask.hpp"><boost/integer/integer_mask.hpp></a><br>
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<br>
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</code><a href="doc/integer_mask.html">documentation</a></td>
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<td valign="top">Templates for the selection of integer masks, single or lowest group, based on the number of bits.</td>
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<td valign="top">Use to select a particular mask when the bit position(s) are based on a compile-time variable.
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Useful for generic programming. </td>
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</tr>
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<tr>
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<td align="center"><code><a href="../../boost/integer/static_log2.hpp"><boost/integer/static_log2.hpp></a><br>
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<br>
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</code><a href="doc/static_log2.html">documentation</a></td>
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<td valign="top">Template for finding the highest power of two in a number.</td>
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<td valign="top">Use to find the bit-size/range based on a maximum value.
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Useful for generic programming. </td>
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</tr>
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<tr>
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<td align="center"><code><a href="../../boost/integer/static_min_max.hpp"><boost/integer/static_min_max.hpp></a><br>
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<br>
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</code><a href="doc/static_min_max.html">documentation</a></td>
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<td valign="top">Templates for finding the extrema of two numbers.</td>
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<td valign="top">Use to find a bound based on a minimum or maximum value.
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Useful for generic programming. </td>
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</tr>
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</table>
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<h2>Rationale</h2>
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<p>The organization of boost integer headers and classes is designed to
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take advantage of <cite><stdint.h></cite> types from the 1999 C
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standard without resorting to undefined behavior in terms of the 1998
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C++ standard. The header <cite><boost/cstdint.hpp></cite> makes
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the standard integer types safely available in namespace
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<code>boost</code> without placing any names in namespace
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<code>std</code>. As always, the intension is to complement rather than
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compete with the C++ Standard Library. Should some future C++ standard
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include <cite><stdint.h></cite> and <cite><cstdint></cite>,
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then <cite><boost/cstdint.hpp></cite> will continue to function,
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but will become redundant and may be safely deprecated.</p>
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<p>Because these are boost headers, their names conform to boost header
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naming conventions rather than C++ Standard Library header naming
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conventions.</p>
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<h2><i>Caveat emptor</i></h2>
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<p>As an implementation artifact, certain C
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<cite><limits.h></cite> macro names may possibly be visible to
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users of <cite><boost/cstdint.hpp></cite>. Don't use these
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macros; they are not part of any Boost-specified interface. Use
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<code>boost::integer_traits<></code> or
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<code>std::numeric_limits<></code> instead.</p>
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<p>As another implementation artifact, certain C
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<cite><stdint.h></cite> typedef names may possibly be visible in
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the global namespace to users of <cite><boost/cstdint.hpp></cite>.
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Don't use these names, they are not part of any Boost-specified
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interface. Use the respective names in namespace <code>boost</code>
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instead.</p>
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<h2>
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<i>History</i>
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</h2>
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<p>
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Reverted Trunk to release branch state (i.e. a "known good state"), Nov 2009. Then fixed issues:
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<a href="https://svn.boost.org/trac/boost/ticket/653">653</a>,
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<a href="https://svn.boost.org/trac/boost/ticket/3084">3084</a>,
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<a href="https://svn.boost.org/trac/boost/ticket/3177">3177</a>,
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<a href="https://svn.boost.org/trac/boost/ticket/3180">3180</a>,
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<a href="https://svn.boost.org/trac/boost/ticket/3548">3568</a>,
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<a href="https://svn.boost.org/trac/boost/ticket/3657">3657</a>,
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<a href="https://svn.boost.org/trac/boost/ticket/2134">2134</a>,
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</p>
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<hr>
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<p>Revised: <!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %b %Y" startspan -->06 Nov 2007<!--webbot bot="Timestamp" endspan i-checksum="15272" -->
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</p>
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<p>© Copyright Beman Dawes 2003</p>
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<p>Distributed under the Boost Software License, Version 1.0. See
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<a href="http://www.boost.org/LICENSE_1_0.txt">www.boost.org/LICENSE_1_0.txt</a></p>
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