📄 eprecomp_8cpp-source.html
字号:
<a name="l00052"></a>00052 m_bases.clear();<a name="l00053"></a>00053 <span class="keywordflow">while</span> (!seq.EndReached())<a name="l00054"></a>00054 m_bases.push_back(group.<a class="code" href="class_d_l___group_precomputation.html#43a840afa6f0e49a60c28883380c6990">BERDecodeElement</a>(seq));<a name="l00055"></a>00055 <span class="keywordflow">if</span> (!m_bases.empty() && group.<a class="code" href="class_d_l___group_precomputation.html#f06195fe5dbbf8da4491a9b7356b1293">NeedConversions</a>())<a name="l00056"></a>00056 m_base = group.<a class="code" href="class_d_l___group_precomputation.html#635d54785535b42cd9611213b6140fd0">ConvertOut</a>(m_bases[0]);<a name="l00057"></a>00057 seq.MessageEnd();<a name="l00058"></a>00058 }<a name="l00059"></a>00059 <a name="l00060"></a><a class="code" href="class_d_l___fixed_base_precomputation_impl.html#bcfa8d9239aafa6dde7016fa10a8417b">00060</a> <span class="keyword">template</span> <<span class="keyword">class</span> T> <span class="keywordtype">void</span> <a class="code" href="class_d_l___fixed_base_precomputation_impl.html#bcfa8d9239aafa6dde7016fa10a8417b">DL_FixedBasePrecomputationImpl<T>::Save</a>(<span class="keyword">const</span> <a class="code" href="class_d_l___group_precomputation.html">DL_GroupPrecomputation<Element></a> &group, <a class="code" href="class_buffered_transformation.html" title="interface for buffered transformations">BufferedTransformation</a> &bt)<span class="keyword"> const</span><a name="l00061"></a>00061 <span class="keyword"></span>{<a name="l00062"></a>00062 <a class="code" href="class_d_e_r_sequence_encoder.html" title="DER Sequence Encoder.">DERSequenceEncoder</a> seq(bt);<a name="l00063"></a>00063 DEREncodeUnsigned<word32>(seq, 1); <span class="comment">// version</span><a name="l00064"></a>00064 m_exponentBase.<a class="code" href="class_integer.html#6ab51a05bee88cfa690179611e8a084e" title="encode using Distinguished Encoding Rules, put result into a BufferedTransformation...">DEREncode</a>(seq);<a name="l00065"></a>00065 <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> i=0; i<m_bases.size(); i++)<a name="l00066"></a>00066 group.<a class="code" href="class_d_l___group_precomputation.html#6b6549c73ef485921210e88325e9dca1">DEREncodeElement</a>(seq, m_bases[i]);<a name="l00067"></a>00067 seq.MessageEnd();<a name="l00068"></a>00068 }<a name="l00069"></a>00069 <a name="l00070"></a>00070 <span class="keyword">template</span> <<span class="keyword">class</span> T> <span class="keywordtype">void</span> <a class="code" href="class_d_l___fixed_base_precomputation_impl.html">DL_FixedBasePrecomputationImpl<T>::PrepareCascade</a>(<span class="keyword">const</span> <a class="code" href="class_d_l___group_precomputation.html">DL_GroupPrecomputation<Element></a> &i_group, std::vector<<a class="code" href="struct_base_and_exponent.html" title="Base and Exponent.">BaseAndExponent<Element></a> > &eb, <span class="keyword">const</span> <a class="code" href="class_integer.html" title="multiple precision integer and basic arithmetics">Integer</a> &exponent)<span class="keyword"> const</span><a name="l00071"></a>00071 <span class="keyword"></span>{<a name="l00072"></a>00072 <span class="keyword">const</span> <a class="code" href="class_abstract_group.html" title="Abstract Group.">AbstractGroup<T></a> &group = i_group.<a class="code" href="class_d_l___group_precomputation.html#6a0d6f599656d439c7254fbd1855d155">GetGroup</a>();<a name="l00073"></a>00073 <a name="l00074"></a>00074 <a class="code" href="class_integer.html" title="multiple precision integer and basic arithmetics">Integer</a> r, q, e = exponent;<a name="l00075"></a>00075 <span class="keywordtype">bool</span> fastNegate = group.<a class="code" href="class_abstract_group.html#257836994abefe25b80293f4c6b10f60">InversionIsFast</a>() && m_windowSize > 1;<a name="l00076"></a>00076 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i;<a name="l00077"></a>00077 <a name="l00078"></a>00078 <span class="keywordflow">for</span> (i=0; i+1<m_bases.size(); i++)<a name="l00079"></a>00079 {<a name="l00080"></a>00080 <a class="code" href="class_integer.html#bf2934a6172b4cb5317874f0c993a420" title="returns same result as Divide(r, q, a, Power2(n)), but faster">Integer::DivideByPowerOf2</a>(r, q, e, m_windowSize);<a name="l00081"></a>00081 <a class="code" href="gf2n_8h.html#cd9c045f0b5c2a7595a8a0872dc80f59">std::swap</a>(q, e);<a name="l00082"></a>00082 <span class="keywordflow">if</span> (fastNegate && r.GetBit(m_windowSize-1))<a name="l00083"></a>00083 {<a name="l00084"></a>00084 ++e;<a name="l00085"></a>00085 eb.push_back(<a class="code" href="struct_base_and_exponent.html" title="Base and Exponent.">BaseAndExponent<Element></a>(group.<a class="code" href="class_abstract_group.html#b22563bc0dcb544399d7e22b3589e165">Inverse</a>(m_bases[i]), m_exponentBase - r));<a name="l00086"></a>00086 }<a name="l00087"></a>00087 <span class="keywordflow">else</span><a name="l00088"></a>00088 eb.push_back(<a class="code" href="struct_base_and_exponent.html" title="Base and Exponent.">BaseAndExponent<Element></a>(m_bases[i], r));<a name="l00089"></a>00089 }<a name="l00090"></a>00090 eb.push_back(<a class="code" href="struct_base_and_exponent.html" title="Base and Exponent.">BaseAndExponent<Element></a>(m_bases[i], e));<a name="l00091"></a>00091 }<a name="l00092"></a>00092 <a name="l00093"></a><a class="code" href="class_d_l___fixed_base_precomputation_impl.html#31d6b133cebe1402f420990fecd51422">00093</a> <span class="keyword">template</span> <<span class="keyword">class</span> T> T <a class="code" href="class_d_l___fixed_base_precomputation_impl.html#31d6b133cebe1402f420990fecd51422">DL_FixedBasePrecomputationImpl<T>::Exponentiate</a>(<span class="keyword">const</span> <a class="code" href="class_d_l___group_precomputation.html">DL_GroupPrecomputation<Element></a> &group, <span class="keyword">const</span> <a class="code" href="class_integer.html" title="multiple precision integer and basic arithmetics">Integer</a> &exponent)<span class="keyword"> const</span><a name="l00094"></a>00094 <span class="keyword"></span>{<a name="l00095"></a>00095 std::vector<BaseAndExponent<Element> > eb; <span class="comment">// array of segments of the exponent and precalculated bases</span><a name="l00096"></a>00096 eb.reserve(m_bases.size());<a name="l00097"></a>00097 PrepareCascade(group, eb, exponent);<a name="l00098"></a>00098 <span class="keywordflow">return</span> group.<a class="code" href="class_d_l___group_precomputation.html#635d54785535b42cd9611213b6140fd0">ConvertOut</a>(GeneralCascadeMultiplication<Element>(group.<a class="code" href="class_d_l___group_precomputation.html#6a0d6f599656d439c7254fbd1855d155">GetGroup</a>(), eb.begin(), eb.end()));<a name="l00099"></a>00099 }<a name="l00100"></a>00100 <a name="l00101"></a>00101 <span class="keyword">template</span> <<span class="keyword">class</span> T> T <a name="l00102"></a>00102 <a class="code" href="class_d_l___fixed_base_precomputation_impl.html">DL_FixedBasePrecomputationImpl<T>::CascadeExponentiate</a>(<span class="keyword">const</span> <a class="code" href="class_d_l___group_precomputation.html">DL_GroupPrecomputation<Element></a> &group, <span class="keyword">const</span> <a class="code" href="class_integer.html" title="multiple precision integer and basic arithmetics">Integer</a> &exponent, <a name="l00103"></a>00103 <span class="keyword">const</span> <a class="code" href="class_d_l___fixed_base_precomputation.html">DL_FixedBasePrecomputation<T></a> &i_pc2, <span class="keyword">const</span> <a class="code" href="class_integer.html" title="multiple precision integer and basic arithmetics">Integer</a> &exponent2)<span class="keyword"> const</span><a name="l00104"></a>00104 <span class="keyword"></span>{<a name="l00105"></a>00105 std::vector<BaseAndExponent<Element> > eb; <span class="comment">// array of segments of the exponent and precalculated bases</span><a name="l00106"></a>00106 <span class="keyword">const</span> <a class="code" href="class_d_l___fixed_base_precomputation_impl.html">DL_FixedBasePrecomputationImpl<T></a> &pc2 = <span class="keyword">static_cast<</span><span class="keyword">const </span><a class="code" href="class_d_l___fixed_base_precomputation_impl.html">DL_FixedBasePrecomputationImpl<T></a> &<span class="keyword">></span>(i_pc2);<a name="l00107"></a>00107 eb.reserve(m_bases.size() + pc2.<a class="code" href="class_d_l___fixed_base_precomputation_impl.html#c8ac3d70e41ed0a3e2db214ec1da6bb0">m_bases</a>.size());<a name="l00108"></a>00108 PrepareCascade(group, eb, exponent);<a name="l00109"></a>00109 pc2.<a class="code" href="class_d_l___fixed_base_precomputation_impl.html#1e9f689e246448b8f2d40a5cf39c7733">PrepareCascade</a>(group, eb, exponent2);<a name="l00110"></a>00110 <span class="keywordflow">return</span> group.<a class="code" href="class_d_l___group_precomputation.html#635d54785535b42cd9611213b6140fd0">ConvertOut</a>(GeneralCascadeMultiplication<Element>(group.<a class="code" href="class_d_l___group_precomputation.html#6a0d6f599656d439c7254fbd1855d155">GetGroup</a>(), eb.begin(), eb.end()));<a name="l00111"></a>00111 }<a name="l00112"></a>00112 <a name="l00113"></a>00113 NAMESPACE_END<a name="l00114"></a>00114 <a name="l00115"></a>00115 <span class="preprocessor">#endif</span><a name="l00116"></a>00116 <span class="preprocessor"></span><a name="l00117"></a>00117 <span class="preprocessor">#endif</span></pre></div><hr size="1"><address style="text-align: right;"><small>Generated on Fri Jun 1 11:11:20 2007 for Crypto++ by <a href="http://www.doxygen.org/index.html"><img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.5.2 </small></address></body></html>⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -