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<title>Importing and Exporting Data to and from cpp_int and cpp_bin_float</title>
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<div class="titlepage"><div><div><h3 class="title">
<a name="boost_multiprecision.tut.import_export"></a><a class="link" href="import_export.html" title="Importing and Exporting Data to and from cpp_int and cpp_bin_float">Importing and
- Exporting Data to and from cpp_int and cpp_bin_float</a>
+ Exporting Data to and from <code class="computeroutput"><span class="identifier">cpp_int</span></code>
+ and <code class="computeroutput"><span class="identifier">cpp_bin_float</span></code></a>
</h3></div></div></div>
<p>
Any integer number type that uses <code class="computeroutput"><span class="identifier">cpp_int_backend</span></code>
- as it's implementation layer can import or export it's bits via two non-member
+ as it's implementation layer can import or export its bits via two non-member
functions:
</p>
<pre class="programlisting"><span class="keyword">template</span> <span class="special"><</span><span class="keyword">unsigned</span> <span class="identifier">MinBits</span><span class="special">,</span> <span class="keyword">unsigned</span> <span class="identifier">MaxBits</span><span class="special">,</span> <span class="identifier">cpp_integer_type</span> <span class="identifier">SignType</span><span class="special">,</span> <span class="identifier">cpp_int_check_type</span> <span class="identifier">Checked</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Allocator</span><span class="special">,</span>
These functions are designed for data-interchange with other storage formats,
and since <a class="link" href="floats/cpp_bin_float.html" title="cpp_bin_float">cpp_bin_float</a>
uses <a class="link" href="ints/cpp_int.html" title="cpp_int">cpp_int</a>
- internally, by extension they can be used for floating point numbers based
+ internally, by extension they can be used for floating-point numbers based
on that backend as well (see example below). Parameters and use are as follows:
</p>
<pre class="programlisting"><span class="keyword">template</span> <span class="special"><</span><span class="keyword">unsigned</span> <span class="identifier">MinBits</span><span class="special">,</span> <span class="keyword">unsigned</span> <span class="identifier">MaxBits</span><span class="special">,</span> <span class="identifier">cpp_integer_type</span> <span class="identifier">SignType</span><span class="special">,</span> <span class="identifier">cpp_int_check_type</span> <span class="identifier">Checked</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Allocator</span><span class="special">,</span>
</tr>
<tr><td align="left" valign="top"><p>
Note that this function is optimized for the case where the data can be
- memcpy'ed from the source to the integer - in this case both iterators
- much be pointers, and everything must be little-endian.
+ <code class="computeroutput"><span class="identifier">memcpy</span></code>ed from the source
+ to the integer - in this case both iterators much be pointers, and everything
+ must be little-endian.
</p></td></tr>
</table></div>
<h5>
<span class="comment">// import back again, and check for equality:</span>
<span class="identifier">cpp_int</span> <span class="identifier">j</span><span class="special">;</span>
<span class="identifier">import_bits</span><span class="special">(</span><span class="identifier">j</span><span class="special">,</span> <span class="identifier">v</span><span class="special">.</span><span class="identifier">begin</span><span class="special">(),</span> <span class="identifier">v</span><span class="special">.</span><span class="identifier">end</span><span class="special">());</span>
- <span class="identifier">assert</span><span class="special">(</span><span class="identifier">i</span> <span class="special">==</span> <span class="identifier">j</span><span class="special">);</span>
+ <span class="identifier">BOOST_ASSERT</span><span class="special">(</span><span class="identifier">i</span> <span class="special">==</span> <span class="identifier">j</span><span class="special">);</span>
<span class="special">}</span>
</pre>
<p>
<span class="identifier">import_bits</span><span class="special">(</span><span class="identifier">i</span><span class="special">,</span> <span class="identifier">v</span><span class="special">.</span><span class="identifier">begin</span><span class="special">(),</span> <span class="identifier">v</span><span class="special">.</span><span class="identifier">end</span><span class="special">());</span>
<span class="identifier">cpp_bin_float_100</span> <span class="identifier">g</span><span class="special">(</span><span class="identifier">i</span><span class="special">);</span>
<span class="identifier">g</span><span class="special">.</span><span class="identifier">backend</span><span class="special">().</span><span class="identifier">exponent</span><span class="special">()</span> <span class="special">=</span> <span class="identifier">e</span><span class="special">;</span>
- <span class="identifier">assert</span><span class="special">(</span><span class="identifier">f</span> <span class="special">==</span> <span class="identifier">g</span><span class="special">);</span>
+ <span class="identifier">BOOST_ASSERT</span><span class="special">(</span><span class="identifier">f</span> <span class="special">==</span> <span class="identifier">g</span><span class="special">);</span>
<span class="special">}</span>
</pre>
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