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<div class="title">edelib/Functional.h</div> </div>
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<div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment"> * $Id: List.h 2839 2009-09-28 11:36:20Z karijes $</span>
<a name="l00003"></a>00003 <span class="comment"> *</span>
<a name="l00004"></a>00004 <span class="comment"> * Functional approach for lists</span>
<a name="l00005"></a>00005 <span class="comment"> * Copyright (c) 2005-2011 edelib authors</span>
<a name="l00006"></a>00006 <span class="comment"> *</span>
<a name="l00007"></a>00007 <span class="comment"> * This library is free software; you can redistribute it and/or</span>
<a name="l00008"></a>00008 <span class="comment"> * modify it under the terms of the GNU Lesser General Public</span>
<a name="l00009"></a>00009 <span class="comment"> * License as published by the Free Software Foundation; either</span>
<a name="l00010"></a>00010 <span class="comment"> * version 2 of the License, or (at your option) any later version.</span>
<a name="l00011"></a>00011 <span class="comment"> *</span>
<a name="l00012"></a>00012 <span class="comment"> * This library is distributed in the hope that it will be useful,</span>
<a name="l00013"></a>00013 <span class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00014"></a>00014 <span class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span>
<a name="l00015"></a>00015 <span class="comment"> * Lesser General Public License for more details.</span>
<a name="l00016"></a>00016 <span class="comment"> *</span>
<a name="l00017"></a>00017 <span class="comment"> * You should have received a copy of the GNU Lesser General Public License</span>
<a name="l00018"></a>00018 <span class="comment"> * along with this library. If not, see <http://www.gnu.org/licenses/>.</span>
<a name="l00019"></a>00019 <span class="comment"> */</span>
<a name="l00020"></a>00020
<a name="l00021"></a>00021 <span class="preprocessor">#ifndef __EDELIB_FUNCTIONAL_H__</span>
<a name="l00022"></a>00022 <span class="preprocessor"></span><span class="preprocessor">#define __EDELIB_FUNCTIONAL_H__</span>
<a name="l00023"></a>00023 <span class="preprocessor"></span>
<a name="l00024"></a>00024 <span class="preprocessor">#include "Debug.h"</span>
<a name="l00025"></a>00025
<a name="l00026"></a>00026 EDELIB_NS_BEGIN
<a name="l00027"></a>00027
<a name="l00037"></a>00037 <span class="keyword">template</span> <<span class="keyword">typename</span> T, <span class="keyword">typename</span> F>
<a name="l00038"></a><a class="code" href="group__functional.html#ga006151087fcd26f851ae85705a235602">00038</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> <a class="code" href="group__functional.html#ga006151087fcd26f851ae85705a235602">filter</a>(<span class="keyword">const</span> F& func, <span class="keyword">const</span> T& container, T& ret) {
<a name="l00039"></a>00039 <span class="keyword">typename</span> T::const_iterator it = container.begin();
<a name="l00040"></a>00040 <span class="keyword">typename</span> T::const_iterator ite = container.end();
<a name="l00041"></a>00041
<a name="l00042"></a>00042 <span class="keywordflow">for</span>(; it != ite; ++it) {
<a name="l00043"></a>00043 <span class="keywordflow">if</span>(func(*it))
<a name="l00044"></a>00044 ret.push_back(*it);
<a name="l00045"></a>00045 }
<a name="l00046"></a>00046
<a name="l00047"></a>00047 <span class="keywordflow">return</span> ret.size();
<a name="l00048"></a>00048 }
<a name="l00049"></a>00049
<a name="l00054"></a>00054 <span class="keyword">template</span> <<span class="keyword">typename</span> T, <span class="keyword">typename</span> F>
<a name="l00055"></a><a class="code" href="group__functional.html#ga232b6e2a00cdaa04e963c23142148f6d">00055</a> <span class="keywordtype">void</span> <a class="code" href="group__functional.html#ga232b6e2a00cdaa04e963c23142148f6d">map</a>(F& func, <span class="keyword">const</span> T& container, T& ret) {
<a name="l00056"></a>00056 <span class="keyword">typename</span> T::const_iterator it = container.begin();
<a name="l00057"></a>00057 <span class="keyword">typename</span> T::const_iterator ite = container.end();
<a name="l00058"></a>00058
<a name="l00059"></a>00059 <span class="keywordflow">for</span>(; it != ite; ++it)
<a name="l00060"></a>00060 ret.push_back(func(*it));
<a name="l00061"></a>00061 }
<a name="l00062"></a>00062
<a name="l00078"></a>00078 <span class="keyword">template</span> <<span class="keyword">typename</span> T, <span class="keyword">typename</span> R, <span class="keyword">typename</span> F>
<a name="l00079"></a><a class="code" href="group__functional.html#ga6b67fe1362db79b11f8fb9b89ef5301f">00079</a> <span class="keywordtype">void</span> <a class="code" href="group__functional.html#ga6b67fe1362db79b11f8fb9b89ef5301f">reduce</a>(F& func, <span class="keyword">const</span> T& container, R& ret) {
<a name="l00080"></a>00080 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> sz = container.size();
<a name="l00081"></a>00081 <span class="keywordflow">if</span>(sz == 0) {
<a name="l00082"></a>00082 <span class="comment">// nothing</span>
<a name="l00083"></a>00083 } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(sz == 1)
<a name="l00084"></a>00084 ret = *container.begin();
<a name="l00085"></a>00085 <span class="keywordflow">else</span> {
<a name="l00086"></a>00086 <span class="keyword">typename</span> T::const_iterator it = container.begin();
<a name="l00087"></a>00087 <span class="keyword">typename</span> T::const_iterator it2 = it;
<a name="l00088"></a>00088 ++it2;
<a name="l00089"></a>00089 <span class="keyword">typename</span> T::const_iterator ite = container.end();
<a name="l00090"></a>00090
<a name="l00091"></a>00091 ret = func(*it, *it2);
<a name="l00092"></a>00092 <span class="keywordflow">for</span>(++it2; it2 != ite; ++it2)
<a name="l00093"></a>00093 ret = func(*it2, ret);
<a name="l00094"></a>00094 }
<a name="l00095"></a>00095 }
<a name="l00096"></a>00096
<a name="l00101"></a>00101 <span class="keyword">template</span> <<span class="keyword">typename</span> T, <span class="keyword">typename</span> F>
<a name="l00102"></a><a class="code" href="group__functional.html#ga61c6fbe775766e5c6c30f680b3e08a27">00102</a> <span class="keywordtype">void</span> <a class="code" href="group__functional.html#ga61c6fbe775766e5c6c30f680b3e08a27">for_each</a>(<span class="keyword">const</span> F& func, <span class="keyword">const</span> T& container) {
<a name="l00103"></a>00103 <span class="keyword">typename</span> T::const_iterator it = container.begin();
<a name="l00104"></a>00104 <span class="keyword">typename</span> T::const_iterator ite = container.end();
<a name="l00105"></a>00105
<a name="l00106"></a>00106 <span class="keywordflow">for</span>(; it != ite; ++it)
<a name="l00107"></a>00107 func(*it);
<a name="l00108"></a>00108 }
<a name="l00109"></a>00109
<a name="l00115"></a>00115 <span class="keyword">template</span> <<span class="keyword">typename</span> T, <span class="keyword">typename</span> F>
<a name="l00116"></a><a class="code" href="group__functional.html#ga132a909437faa169ec7587a324d4ba29">00116</a> <span class="keywordtype">void</span> <a class="code" href="group__functional.html#ga61c6fbe775766e5c6c30f680b3e08a27">for_each</a>(<span class="keyword">const</span> F& func, <span class="keyword">const</span> T& container, <span class="keywordtype">void</span>* p) {
<a name="l00117"></a>00117 <span class="keyword">typename</span> T::const_iterator it = container.begin();
<a name="l00118"></a>00118 <span class="keyword">typename</span> T::const_iterator ite = container.end();
<a name="l00119"></a>00119
<a name="l00120"></a>00120 <span class="keywordflow">for</span>(; it != ite; ++it)
<a name="l00121"></a>00121 func(*it, p);
<a name="l00122"></a>00122 }
<a name="l00123"></a>00123
<a name="l00124"></a>00124 EDELIB_NS_END
<a name="l00125"></a>00125 <span class="preprocessor">#endif</span>
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