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著名的密码库Crypto++的文档 C++语言的杰作。程序员必备。

<a name="l00069"></a>00069                         m_tempSpace.New(bufferSize);
<a name="l00070"></a>00070                 }
<a name="l00071"></a>00071 
<a name="l00072"></a>00072                 bufferSize = m_tempSpace.size();
<a name="l00073"></a>00073                 <span class="keywordflow">return</span> m_tempSpace.begin();
<a name="l00074"></a>00074         }
<a name="l00075"></a><a class="code" href="struct_filter_put_space_helper.html#01f7232d4f27bc0c0a20115aa5090924">00075</a>         byte *HelpCreatePutSpace(<a class="code" href="class_buffered_transformation.html" title="interface for buffered transformations">BufferedTransformation</a> &amp;target, <span class="keyword">const</span> std::string &amp;channel, <span class="keywordtype">size_t</span> minSize)
<a name="l00076"></a>00076                 {<span class="keywordflow">return</span> HelpCreatePutSpace(target, channel, minSize, minSize, minSize);}
<a name="l00077"></a><a class="code" href="struct_filter_put_space_helper.html#a6549687729073e4900e0867f59c0f4f">00077</a>         byte *HelpCreatePutSpace(<a class="code" href="class_buffered_transformation.html" title="interface for buffered transformations">BufferedTransformation</a> &amp;target, <span class="keyword">const</span> std::string &amp;channel, <span class="keywordtype">size_t</span> minSize, <span class="keywordtype">size_t</span> bufferSize)
<a name="l00078"></a>00078                 {<span class="keywordflow">return</span> HelpCreatePutSpace(target, channel, minSize, minSize, bufferSize);}
<a name="l00079"></a><a class="code" href="struct_filter_put_space_helper.html#c50ca63d7b1a529a32e8596aa44df9c4">00079</a>         <a class="code" href="class_sec_block.html" title="a block of memory allocated using A">SecByteBlock</a> m_tempSpace;
<a name="l00080"></a>00080 };
<a name="l00081"></a>00081 <span class="comment"></span>
<a name="l00082"></a>00082 <span class="comment">//! measure how many byte and messages pass through, also serves as valve</span>
<a name="l00083"></a><a class="code" href="class_meter_filter.html">00083</a> <span class="comment"></span><span class="keyword">class </span>CRYPTOPP_DLL MeterFilter : <span class="keyword">public</span> <a class="code" href="class_bufferless.html" title="_">Bufferless</a>&lt;Filter&gt;
<a name="l00084"></a>00084 {
<a name="l00085"></a>00085 <span class="keyword">public</span>:
<a name="l00086"></a><a class="code" href="class_meter_filter.html#6d458e027fdc3b9a481a633ae04459d2">00086</a>         MeterFilter(<a class="code" href="class_buffered_transformation.html" title="interface for buffered transformations">BufferedTransformation</a> *attachment=NULL, <span class="keywordtype">bool</span> transparent=<span class="keyword">true</span>)
<a name="l00087"></a>00087                 : m_transparent(transparent) {Detach(attachment); ResetMeter();}
<a name="l00088"></a>00088 
<a name="l00089"></a><a class="code" href="class_meter_filter.html#d6f0f8c7bbc82fefb44c3c4747e3d3e9">00089</a>         <span class="keywordtype">void</span> SetTransparent(<span class="keywordtype">bool</span> transparent) {m_transparent = transparent;}
<a name="l00090"></a>00090         <span class="keywordtype">void</span> AddRangeToSkip(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> message, lword position, lword size, <span class="keywordtype">bool</span> sortNow = <span class="keyword">true</span>);
<a name="l00091"></a>00091         <span class="keywordtype">void</span> ResetMeter();
<a name="l00092"></a><a class="code" href="class_meter_filter.html#141a6f8b09072847dbdd6a3f0f33f865">00092</a>         <span class="keywordtype">void</span> IsolatedInitialize(<span class="keyword">const</span> <a class="code" href="class_name_value_pairs.html" title="interface for retrieving values given their names">NameValuePairs</a> &amp;parameters) {ResetMeter();}
<a name="l00093"></a>00093 
<a name="l00094"></a><a class="code" href="class_meter_filter.html#63711f8a8058940cf652c84483bc13c0">00094</a>         lword GetCurrentMessageBytes()<span class="keyword"> const </span>{<span class="keywordflow">return</span> m_currentMessageBytes;}
<a name="l00095"></a><a class="code" href="class_meter_filter.html#822e573c89bf1a905f2d86f25af1344a">00095</a>         lword GetTotalBytes() {<span class="keywordflow">return</span> m_totalBytes;}
<a name="l00096"></a><a class="code" href="class_meter_filter.html#e04af1de9800400ad830cbcfbde39616">00096</a>         <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> GetCurrentSeriesMessages() {<span class="keywordflow">return</span> m_currentSeriesMessages;}
<a name="l00097"></a><a class="code" href="class_meter_filter.html#62bcc765c811853ab695f6e03920b2c7">00097</a>         <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> GetTotalMessages() {<span class="keywordflow">return</span> m_totalMessages;}
<a name="l00098"></a><a class="code" href="class_meter_filter.html#669934f985f8861e5d27e3e9377ce45c">00098</a>         <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> GetTotalMessageSeries() {<span class="keywordflow">return</span> m_totalMessageSeries;}
<a name="l00099"></a>00099 
<a name="l00100"></a><a class="code" href="class_meter_filter.html#49d92192dcbd3366ff0576159ea62e9d">00100</a>         byte * CreatePutSpace(<span class="keywordtype">size_t</span> &amp;size)
<a name="l00101"></a>00101                 {<span class="keywordflow">return</span> AttachedTransformation()-&gt;CreatePutSpace(size);}
<a name="l00102"></a>00102         <span class="keywordtype">size_t</span> Put2(<span class="keyword">const</span> byte *begin, <span class="keywordtype">size_t</span> length, <span class="keywordtype">int</span> messageEnd, <span class="keywordtype">bool</span> blocking);
<a name="l00103"></a>00103         <span class="keywordtype">size_t</span> PutModifiable2(byte *inString, <span class="keywordtype">size_t</span> length, <span class="keywordtype">int</span> messageEnd, <span class="keywordtype">bool</span> blocking);
<a name="l00104"></a>00104         <span class="keywordtype">bool</span> IsolatedMessageSeriesEnd(<span class="keywordtype">bool</span> blocking);
<a name="l00105"></a>00105 
<a name="l00106"></a>00106 <span class="keyword">private</span>:
<a name="l00107"></a>00107         <span class="keywordtype">size_t</span> PutMaybeModifiable(byte *inString, <span class="keywordtype">size_t</span> length, <span class="keywordtype">int</span> messageEnd, <span class="keywordtype">bool</span> blocking, <span class="keywordtype">bool</span> modifiable);
<a name="l00108"></a>00108         <span class="keywordtype">bool</span> ShouldPropagateMessageEnd()<span class="keyword"> const </span>{<span class="keywordflow">return</span> m_transparent;}
<a name="l00109"></a>00109         <span class="keywordtype">bool</span> ShouldPropagateMessageSeriesEnd()<span class="keyword"> const </span>{<span class="keywordflow">return</span> m_transparent;}
<a name="l00110"></a>00110 
<a name="l00111"></a>00111         <span class="keyword">struct </span>MessageRange
<a name="l00112"></a>00112         {
<a name="l00113"></a>00113                 <span class="keyword">inline</span> <span class="keywordtype">bool</span> <a class="code" href="gf2n_8h.html#f81f67e93bfb8bbb776cab689c83c7e9" title="compares degree">operator&lt;</a>(<span class="keyword">const</span> MessageRange &amp;b) <span class="keyword">const</span>      <span class="comment">// BCB2006 workaround: this has to be a member function</span>
<a name="l00114"></a>00114                         {<span class="keywordflow">return</span> message &lt; b.message || (message == b.message &amp;&amp; position &lt; b.position);}
<a name="l00115"></a>00115                 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> message; lword position; lword size;
<a name="l00116"></a>00116         };
<a name="l00117"></a>00117 
<a name="l00118"></a>00118         <span class="keywordtype">bool</span> m_transparent;
<a name="l00119"></a>00119         lword m_currentMessageBytes, m_totalBytes;
<a name="l00120"></a>00120         <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> m_currentSeriesMessages, m_totalMessages, m_totalMessageSeries;
<a name="l00121"></a>00121         std::deque&lt;MessageRange&gt; m_rangesToSkip;
<a name="l00122"></a>00122         byte *m_begin;
<a name="l00123"></a>00123         <span class="keywordtype">size_t</span> m_length;
<a name="l00124"></a>00124 };
<a name="l00125"></a>00125 <span class="comment"></span>
<a name="l00126"></a>00126 <span class="comment">//! _</span>
<a name="l00127"></a><a class="code" href="class_transparent_filter.html">00127</a> <span class="comment"></span><span class="keyword">class </span>CRYPTOPP_DLL TransparentFilter : <span class="keyword">public</span> MeterFilter
<a name="l00128"></a>00128 {
<a name="l00129"></a>00129 <span class="keyword">public</span>:
<a name="l00130"></a><a class="code" href="class_transparent_filter.html#ed955b969c7623d108346f2a97d0e1cd">00130</a>         TransparentFilter(<a class="code" href="class_buffered_transformation.html" title="interface for buffered transformations">BufferedTransformation</a> *attachment=NULL) : MeterFilter(attachment, true) {}
<a name="l00131"></a>00131 };
<a name="l00132"></a>00132 <span class="comment"></span>
<a name="l00133"></a>00133 <span class="comment">//! _</span>
<a name="l00134"></a><a class="code" href="class_opaque_filter.html">00134</a> <span class="comment"></span><span class="keyword">class </span>CRYPTOPP_DLL OpaqueFilter : <span class="keyword">public</span> MeterFilter
<a name="l00135"></a>00135 {
<a name="l00136"></a>00136 <span class="keyword">public</span>:
<a name="l00137"></a><a class="code" href="class_opaque_filter.html#f1cce756d535a725ac0f490c48e6ab50">00137</a>         OpaqueFilter(<a class="code" href="class_buffered_transformation.html" title="interface for buffered transformations">BufferedTransformation</a> *attachment=NULL) : MeterFilter(attachment, false) {}
<a name="l00138"></a>00138 };
<a name="l00139"></a>00139 <span class="comment"></span>
<a name="l00140"></a>00140 <span class="comment">/*! FilterWithBufferedInput divides up the input stream into</span>
<a name="l00141"></a>00141 <span class="comment">        a first block, a number of middle blocks, and a last block.</span>
<a name="l00142"></a>00142 <span class="comment">        First and last blocks are optional, and middle blocks may</span>
<a name="l00143"></a>00143 <span class="comment">        be a stream instead (i.e. blockSize == 1).</span>
<a name="l00144"></a>00144 <span class="comment">*/</span>
<a name="l00145"></a><a class="code" href="class_filter_with_buffered_input.html">00145</a> <span class="keyword">class </span>CRYPTOPP_DLL FilterWithBufferedInput : <span class="keyword">public</span> <a class="code" href="class_filter.html" title="provides an implementation of BufferedTransformation's attachment interface">Filter</a>
<a name="l00146"></a>00146 {
<a name="l00147"></a>00147 <span class="keyword">public</span>:
<a name="l00148"></a>00148         FilterWithBufferedInput(<a class="code" href="class_buffered_transformation.html" title="interface for buffered transformations">BufferedTransformation</a> *attachment);<span class="comment"></span>
<a name="l00149"></a>00149 <span class="comment">        //! firstSize and lastSize may be 0, blockSize must be at least 1</span>
<a name="l00150"></a>00150 <span class="comment"></span>        FilterWithBufferedInput(<span class="keywordtype">size_t</span> firstSize, <span class="keywordtype">size_t</span> blockSize, <span class="keywordtype">size_t</span> lastSize, <a class="code" href="class_buffered_transformation.html" title="interface for buffered transformations">BufferedTransformation</a> *attachment);
<a name="l00151"></a>00151 
<a name="l00152"></a>00152         <span class="keywordtype">void</span> <a class="code" href="class_buffered_transformation.html#7bb05ac3b6302e2ab994586d526fa804">IsolatedInitialize</a>(<span class="keyword">const</span> <a class="code" href="class_name_value_pairs.html" title="interface for retrieving values given their names">NameValuePairs</a> &amp;parameters);
<a name="l00153"></a><a class="code" href="class_filter_with_buffered_input.html#9885841f5ecee1403b57c5b1fc28a928">00153</a>         <span class="keywordtype">size_t</span> <a class="code" href="class_buffered_transformation.html#d396dcb42260f23125a35ec0e5d17d55" title="input multiple bytes for blocking or non-blocking processing">Put2</a>(<span class="keyword">const</span> byte *inString, <span class="keywordtype">size_t</span> length, <span class="keywordtype">int</span> messageEnd, <span class="keywordtype">bool</span> blocking)
<a name="l00154"></a>00154         {
<a name="l00155"></a>00155                 <span class="keywordflow">return</span> PutMaybeModifiable(const_cast&lt;byte *&gt;(inString), length, messageEnd, blocking, <span class="keyword">false</span>);
<a name="l00156"></a>00156         }
<a name="l00157"></a><a class="code" href="class_filter_with_buffered_input.html#bc7a44af560a17d30a48651683e18e6e">00157</a>         <span class="keywordtype">size_t</span> <a class="code" href="class_buffered_transformation.html#770bf11f26d4dec66423a7dc2d36843d" title="input multiple bytes that may be modified by callee for blocking or non-blocking...">PutModifiable2</a>(byte *inString, <span class="keywordtype">size_t</span> length, <span class="keywordtype">int</span> messageEnd, <span class="keywordtype">bool</span> blocking)