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<h1>apply_operation_base.hpp</h1><a href="g_i_l_0008.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment">    Copyright 2005-2007 Adobe Systems Incorporated</span>
<a name="l00003"></a>00003 <span class="comment">   </span>
<a name="l00004"></a>00004 <span class="comment">    Use, modification and distribution are subject to the Boost Software License,</span>
<a name="l00005"></a>00005 <span class="comment">    Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at</span>
<a name="l00006"></a>00006 <span class="comment">    http://www.boost.org/LICENSE_1_0.txt).</span>
<a name="l00007"></a>00007 <span class="comment"></span>
<a name="l00008"></a>00008 <span class="comment">    See http://opensource.adobe.com/gil for most recent version including documentation.</span>
<a name="l00009"></a>00009 <span class="comment">*/</span>
<a name="l00010"></a>00010 
<a name="l00011"></a>00011 <span class="comment">/*************************************************************************************************/</span>
<a name="l00012"></a>00012 
<a name="l00013"></a>00013 <span class="preprocessor">#ifndef GIL_APPLY_OPERATION_BASE_HPP</span>
<a name="l00014"></a>00014 <span class="preprocessor"></span><span class="preprocessor">#define GIL_APPLY_OPERATION_BASE_HPP</span>
<a name="l00015"></a>00015 <span class="preprocessor"></span>
<a name="l00016"></a>00016 <span class="preprocessor">#include "../../gil_config.hpp"</span>
<a name="l00017"></a>00017 <span class="preprocessor">#include "../../utilities.hpp"</span>
<a name="l00018"></a>00018 <span class="preprocessor">#include &lt;boost/mpl/begin.hpp&gt;</span>
<a name="l00019"></a>00019 <span class="preprocessor">#include &lt;boost/mpl/next.hpp&gt;</span>
<a name="l00020"></a>00020 <span class="preprocessor">#include &lt;boost/mpl/deref.hpp&gt;</span>
<a name="l00021"></a>00021 <span class="preprocessor">#include &lt;boost/mpl/size.hpp&gt;</span>
<a name="l00022"></a>00022 <span class="preprocessor">#include &lt;boost/preprocessor/repeat.hpp&gt;</span> 
<a name="l00023"></a>00023 
<a name="l00033"></a>00033 
<a name="l00034"></a>00034 <span class="keyword">namespace </span>boost { <span class="keyword">namespace </span>gil {
<a name="l00035"></a>00035 
<a name="l00036"></a>00036 <span class="comment">/*</span>
<a name="l00037"></a>00037 <span class="comment">GENERATE_APPLY_FWD_OPS generates for every N functions that look like this (for N==2):</span>
<a name="l00038"></a>00038 <span class="comment"></span>
<a name="l00039"></a>00039 <span class="comment">    template &lt;&gt; struct apply_operation_fwd_fn&lt;3&gt; {</span>
<a name="l00040"></a>00040 <span class="comment">        template &lt;typename Types, typename Bits, typename UnaryOp&gt;</span>
<a name="l00041"></a>00041 <span class="comment">        typename UnaryOp::result_type apply(Bits&amp; bits, std::size_t index, UnaryOp op) const {</span>
<a name="l00042"></a>00042 <span class="comment">            typedef typename mpl::begin&lt;Types&gt;::type T0;</span>
<a name="l00043"></a>00043 <span class="comment">            typedef typename mpl::next&lt;T0&gt;::type T1;</span>
<a name="l00044"></a>00044 <span class="comment">            typedef typename mpl::next&lt;T1&gt;::type T2;</span>
<a name="l00045"></a>00045 <span class="comment">            switch (index) {</span>
<a name="l00046"></a>00046 <span class="comment">                case 0: return op(reinterpret_cast&lt;typename mpl::deref&lt;T0&gt;::type&amp;&gt;(bits));</span>
<a name="l00047"></a>00047 <span class="comment">                case 1: return op(reinterpret_cast&lt;typename mpl::deref&lt;T1&gt;::type&amp;&gt;(bits));</span>
<a name="l00048"></a>00048 <span class="comment">                case 2: return op(reinterpret_cast&lt;typename mpl::deref&lt;T2&gt;::type&amp;&gt;(bits));</span>
<a name="l00049"></a>00049 <span class="comment">            }</span>
<a name="l00050"></a>00050 <span class="comment">            throw;</span>
<a name="l00051"></a>00051 <span class="comment">        }</span>
<a name="l00052"></a>00052 <span class="comment"></span>
<a name="l00053"></a>00053 <span class="comment">        template &lt;typename Types, typename Bits, typename UnaryOp&gt;</span>
<a name="l00054"></a>00054 <span class="comment">        typename UnaryOp::result_type applyc(const Bits&amp; bits, std::size_t index, UnaryOp op) const {</span>
<a name="l00055"></a>00055 <span class="comment">            typedef typename mpl::begin&lt;Types&gt;::type T0;</span>
<a name="l00056"></a>00056 <span class="comment">            typedef typename mpl::next&lt;T0&gt;::type T1;</span>
<a name="l00057"></a>00057 <span class="comment">            typedef typename mpl::next&lt;T1&gt;::type T2;</span>
<a name="l00058"></a>00058 <span class="comment">            switch (index) {</span>
<a name="l00059"></a>00059 <span class="comment">                case 0: return op(reinterpret_cast&lt;const typename mpl::deref&lt;T0&gt;::type&amp;&gt;(bits));</span>
<a name="l00060"></a>00060 <span class="comment">                case 1: return op(reinterpret_cast&lt;const typename mpl::deref&lt;T1&gt;::type&amp;&gt;(bits));</span>
<a name="l00061"></a>00061 <span class="comment">                case 2: return op(reinterpret_cast&lt;const typename mpl::deref&lt;T2&gt;::type&amp;&gt;(bits));</span>
<a name="l00062"></a>00062 <span class="comment">            }</span>
<a name="l00063"></a>00063 <span class="comment">            throw;</span>
<a name="l00064"></a>00064 <span class="comment">        }</span>
<a name="l00065"></a>00065 <span class="comment">    };</span>
<a name="l00066"></a>00066 <span class="comment">*/</span>
<a name="l00067"></a>00067 
<a name="l00068"></a>00068 <span class="preprocessor">#define GIL_FWD_TYPEDEFS(z, N, text)   T##N; typedef typename mpl::next&lt;T##N&gt;::type </span>
<a name="l00069"></a>00069 <span class="preprocessor"></span><span class="preprocessor">#define GIL_FWD_CASE(z, N, SUM)       case N: return op(*gil_reinterpret_cast&lt;typename mpl::deref&lt;T##N&gt;::type*&gt;(&amp;bits));</span>
<a name="l00070"></a>00070 <span class="preprocessor"></span><span class="preprocessor">#define GIL_FWD_CONST_CASE(z, N, SUM) case N: return op(*gil_reinterpret_cast_c&lt;const typename mpl::deref&lt;T##N&gt;::type*&gt;(&amp;bits));</span>
<a name="l00071"></a>00071 <span class="preprocessor"></span>
<a name="l00072"></a>00072 <span class="preprocessor">#define GIL_APPLY_FWD_OP(z, N, text)                                                                        \</span>
<a name="l00073"></a>00073 <span class="preprocessor">    template &lt;&gt; struct apply_operation_fwd_fn&lt;BOOST_PP_ADD(N,1)&gt; {                                      \</span>
<a name="l00074"></a>00074 <span class="preprocessor">        template &lt;typename Types, typename Bits, typename UnaryOp&gt;                                     \</span>
<a name="l00075"></a>00075 <span class="preprocessor">        typename UnaryOp::result_type apply(Bits&amp; bits, std::size_t index, UnaryOp op) const {        \</span>
<a name="l00076"></a>00076 <span class="preprocessor">            typedef typename mpl::begin&lt;Types&gt;::type                                             \</span>
<a name="l00077"></a>00077 <span class="preprocessor">            BOOST_PP_REPEAT(N, GIL_FWD_TYPEDEFS, BOOST_PP_EMPTY)                                            \</span>
<a name="l00078"></a>00078 <span class="preprocessor">            T##N;                                                                                       \</span>
<a name="l00079"></a>00079 <span class="preprocessor">            switch (index) {                                                                            \</span>
<a name="l00080"></a>00080 <span class="preprocessor">                BOOST_PP_REPEAT(BOOST_PP_ADD(N,1), GIL_FWD_CASE, BOOST_PP_EMPTY)                            \</span>
<a name="l00081"></a>00081 <span class="preprocessor">            }                                                                                           \</span>
<a name="l00082"></a>00082 <span class="preprocessor">            throw;                                                                                      \</span>
<a name="l00083"></a>00083 <span class="preprocessor">        }                                                                                               \</span>
<a name="l00084"></a>00084 <span class="preprocessor">        template &lt;typename Types, typename Bits, typename UnaryOp&gt;                                     \</span>
<a name="l00085"></a>00085 <span class="preprocessor">        typename UnaryOp::result_type applyc(const Bits&amp; bits, std::size_t index, UnaryOp op) const { \</span>
<a name="l00086"></a>00086 <span class="preprocessor">            typedef typename mpl::begin&lt;Types&gt;::type                                             \</span>
<a name="l00087"></a>00087 <span class="preprocessor">            BOOST_PP_REPEAT(N, GIL_FWD_TYPEDEFS, BOOST_PP_EMPTY)                                            \</span>
<a name="l00088"></a>00088 <span class="preprocessor">            T##N;                                                                                       \</span>
<a name="l00089"></a>00089 <span class="preprocessor">            switch (index) {                                                                            \</span>
<a name="l00090"></a>00090 <span class="preprocessor">                BOOST_PP_REPEAT(BOOST_PP_ADD(N,1), GIL_FWD_CONST_CASE,BOOST_PP_EMPTY)                       \</span>
<a name="l00091"></a>00091 <span class="preprocessor">            }                                                                                           \</span>
<a name="l00092"></a>00092 <span class="preprocessor">            throw;                                                                                      \</span>
<a name="l00093"></a>00093 <span class="preprocessor">        }                                                                                               \</span>
<a name="l00094"></a>00094 <span class="preprocessor">    };</span>
<a name="l00095"></a>00095 <span class="preprocessor"></span>
<a name="l00096"></a>00096 <span class="preprocessor">#define GIL_GENERATE_APPLY_FWD_OPS(N) BOOST_PP_REPEAT(N, GIL_APPLY_FWD_OP, BOOST_PP_EMPTY)</span>
<a name="l00097"></a>00097 <span class="preprocessor"></span>
<a name="l00098"></a>00098 <span class="keyword">namespace </span>detail {
<a name="l00099"></a>00099 <span class="keyword">template</span> &lt;std::<span class="keywordtype">size_t</span> N&gt; <span class="keyword">struct </span>apply_operation_fwd_fn {};
<a name="l00100"></a>00100 
<a name="l00101"></a>00101 <span class="comment">// Create specializations of apply_operation_fn for each N 0..100</span>
<a name="l00102"></a>00102 GIL_GENERATE_APPLY_FWD_OPS(99)
<a name="l00103"></a>00103 } <span class="comment">// namespace detail</span>
<a name="l00104"></a>00104 
<a name="l00105"></a>00105 <span class="comment">// unary application</span>
<a name="l00106"></a>00106 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> Types, <span class="keyword">typename</span> Bits, <span class="keyword">typename</span> Op&gt; 
<a name="l00107"></a>00107 <span class="keyword">typename</span> Op::result_type GIL_FORCEINLINE apply_operation_basec(<span class="keyword">const</span> Bits&amp; bits, std::size_t index, Op op) {
<a name="l00108"></a>00108     <span class="keywordflow">return</span> detail::apply_operation_fwd_fn&lt;mpl::size&lt;Types&gt;::value&gt;().<span class="keyword">template</span> applyc&lt;Types&gt;(bits,index,op);
<a name="l00109"></a>00109 }
<a name="l00110"></a>00110 
<a name="l00111"></a>00111 <span class="comment">// unary application</span>
<a name="l00112"></a>00112 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> Types, <span class="keyword">typename</span> Bits, <span class="keyword">typename</span> Op&gt; 
<a name="l00113"></a>00113 <span class="keyword">typename</span> Op::result_type GIL_FORCEINLINE apply_operation_base(      Bits&amp; bits, std::size_t index, Op op) {
<a name="l00114"></a>00114     <span class="keywordflow">return</span> detail::apply_operation_fwd_fn&lt;mpl::size&lt;Types&gt;::value&gt;().<span class="keyword">template</span> apply&lt;Types&gt;(bits,index,op);
<a name="l00115"></a>00115 }
<a name="l00116"></a>00116 
<a name="l00117"></a>00117 <span class="keyword">namespace </span>detail {
<a name="l00118"></a>00118     <span class="keyword">template</span> &lt;<span class="keyword">typename</span> T2, <span class="keyword">typename</span> Op&gt;
<a name="l00119"></a>00119     <span class="keyword">struct </span>reduce_bind1 {
<a name="l00120"></a>00120         <span class="keyword">const</span> T2&amp; _t2;
<a name="l00121"></a>00121         <span class="keyword">mutable</span> Op&amp;  _op;
<a name="l00122"></a>00122 
<a name="l00123"></a>00123         <span class="keyword">typedef</span> <span class="keyword">typename</span> Op::result_type result_type;
<a name="l00124"></a>00124 
<a name="l00125"></a>00125         reduce_bind1(<span class="keyword">const</span> T2&amp; t2, Op&amp; op) : _t2(t2), _op(op) {}
<a name="l00126"></a>00126 
<a name="l00127"></a>00127         <span class="keyword">template</span> &lt;<span class="keyword">typename</span> T1&gt; GIL_FORCEINLINE result_type operator()(<span class="keyword">const</span> T1&amp; t1) { <span class="keywordflow">return</span> _op(t1, _t2); }
<a name="l00128"></a>00128     };
<a name="l00129"></a>00129 
<a name="l00130"></a>00130     <span class="keyword">template</span> &lt;<span class="keyword">typename</span> Types1, <span class="keyword">typename</span> Bits1, <span class="keyword">typename</span> Op&gt;
<a name="l00131"></a>00131     <span class="keyword">struct </span>reduce_bind2 {
<a name="l00132"></a>00132         <span class="keyword">const</span> Bits1&amp; _bits1;
<a name="l00133"></a>00133         std::size_t _index1;
<a name="l00134"></a>00134         <span class="keyword">mutable</span> Op&amp;  _op;
<a name="l00135"></a>00135 
<a name="l00136"></a>00136         <span class="keyword">typedef</span> <span class="keyword">typename</span> Op::result_type result_type;
<a name="l00137"></a>00137 
<a name="l00138"></a>00138         reduce_bind2(<span class="keyword">const</span> Bits1&amp; bits1, std::size_t index1, Op&amp; op) : _bits1(bits1), _index1(index1), _op(op) {}
<a name="l00139"></a>00139 
<a name="l00140"></a>00140         <span class="keyword">template</span> &lt;<span class="keyword">typename</span> T2&gt; GIL_FORCEINLINE result_type operator()(<span class="keyword">const</span> T2&amp; t2) { 
<a name="l00141"></a>00141             <span class="keywordflow">return</span> apply_operation_basec&lt;Types1&gt;(_bits1, _index1, reduce_bind1&lt;T2,Op&gt;(t2, _op));
<a name="l00142"></a>00142         }
<a name="l00143"></a>00143     };
<a name="l00144"></a>00144 } <span class="comment">// namespace detail</span>
<a name="l00145"></a>00145 
<a name="l00146"></a>00146 <span class="comment">// Binary application by applying on each dimension separately</span>
<a name="l00147"></a>00147 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> Types1, <span class="keyword">typename</span> Types2, <span class="keyword">typename</span> Bits1, <span class="keyword">typename</span> Bits2, <span class="keyword">typename</span> Op&gt;
<a name="l00148"></a>00148 <span class="keyword">static</span> <span class="keyword">typename</span> Op::result_type GIL_FORCEINLINE apply_operation_base(<span class="keyword">const</span> Bits1&amp; bits1, std::size_t index1, <span class="keyword">const</span> Bits2&amp; bits2, std::size_t index2, Op op) {
<a name="l00149"></a>00149     <span class="keywordflow">return</span> apply_operation_basec&lt;Types2&gt;(bits2,index2,detail::reduce_bind2&lt;Types1,Bits1,Op&gt;(bits1,index1,op));
<a name="l00150"></a>00150 }
<a name="l00151"></a>00151 
<a name="l00152"></a>00152 <span class="preprocessor">#undef GIL_FWD_TYPEDEFS</span>
<a name="l00153"></a>00153 <span class="preprocessor"></span><span class="preprocessor">#undef GIL_FWD_CASE</span>
<a name="l00154"></a>00154 <span class="preprocessor"></span><span class="preprocessor">#undef GIL_FWD_CONST_CASE</span>
<a name="l00155"></a>00155 <span class="preprocessor"></span><span class="preprocessor">#undef GIL_APPLY_FWD_OP</span>
<a name="l00156"></a>00156 <span class="preprocessor"></span><span class="preprocessor">#undef GIL_GENERATE_APPLY_FWD_OPS</span>
<a name="l00157"></a>00157 <span class="preprocessor"></span><span class="preprocessor">#undef BHS</span>
<a name="l00158"></a>00158 <span class="preprocessor"></span>
<a name="l00159"></a>00159 } }  <span class="comment">// namespace boost::gil</span>
<a name="l00160"></a>00160 
<a name="l00161"></a>00161 
<a name="l00162"></a>00162 <span class="preprocessor">#endif</span>
</pre></div></div>
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