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STLHelper.hpp

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00001 /*
00002  * The Apache Software License, Version 1.1
00003  *
00004  *
00005  * Copyright (c) 1999 The Apache Software Foundation.  All rights 
00006  * reserved.
00007  *
00008  * Redistribution and use in source and binary forms, with or without
00009  * modification, are permitted provided that the following conditions
00010  * are met:
00011  *
00012  * 1. Redistributions of source code must retain the above copyright
00013  *    notice, this list of conditions and the following disclaimer. 
00014  *
00015  * 2. Redistributions in binary form must reproduce the above copyright
00016  *    notice, this list of conditions and the following disclaimer in
00017  *    the documentation and/or other materials provided with the
00018  *    distribution.
00019  *
00020  * 3. The end-user documentation included with the redistribution,
00021  *    if any, must include the following acknowledgment:  
00022  *       "This product includes software developed by the
00023  *        Apache Software Foundation (http://www.apache.org/)."
00024  *    Alternately, this acknowledgment may appear in the software itself,
00025  *    if and wherever such third-party acknowledgments normally appear.
00026  *
00027  * 4. The names "Xalan" and "Apache Software Foundation" must
00028  *    not be used to endorse or promote products derived from this
00029  *    software without prior written permission. For written 
00030  *    permission, please contact apache@apache.org.
00031  *
00032  * 5. Products derived from this software may not be called "Apache",
00033  *    nor may "Apache" appear in their name, without prior written
00034  *    permission of the Apache Software Foundation.
00035  *
00036  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
00037  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
00038  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
00039  * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
00040  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
00041  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
00042  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
00043  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
00044  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
00045  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
00046  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
00047  * SUCH DAMAGE.
00048  * ====================================================================
00049  *
00050  * This software consists of voluntary contributions made by many
00051  * individuals on behalf of the Apache Software Foundation and was
00052  * originally based on software copyright (c) 1999, International
00053  * Business Machines, Inc., http://www.ibm.com.  For more
00054  * information on the Apache Software Foundation, please see
00055  * <http://www.apache.org/>.
00056  */
00057 #if !defined(STLHELPERS_HEADER_GUARD_1357924680)
00058 #define STLHELPERS_HEADER_GUARD_1357924680
00059 
00060 
00061 
00062 // Base include file.  Must be first.
00063 #include "PlatformSupportDefinitions.hpp"
00064 
00065 
00066 
00067 #include <algorithm>
00068 #include <functional>
00069 
00070 
00071 
00075 template <class T>
00076 #if defined(XALAN_NO_NAMESPACES)
00077 struct DeleteFunctor : public unary_function<const T*, void>
00078 #else
00079 struct DeleteFunctor : public std::unary_function<const T*, void>
00080 #endif
00081 {
00087     result_type
00088     operator()(argument_type    thePointer) const
00089     {
00090 #if defined(XALAN_CANNOT_DELETE_CONST)
00091         delete (T*)thePointer;
00092 #else
00093         delete thePointer;
00094 #endif
00095     }
00096 };
00097 
00098 
00099 
00100 #if !defined(XALAN_SGI_BASED_STL)
00101 
00106 template <class PairType>
00107 #if defined(XALAN_NO_NAMESPACES)
00108 struct select1st : public unary_function<PairType, PairType::first_type>
00109 #else
00110 struct select1st : public std::unary_function<PairType, PairType::first_type>
00111 #endif
00112 {
00113     typedef typename PairType   value_type;
00114 
00121     typename result_type
00122     operator()(const typename argument_type&    thePair) const
00123     {
00124         return thePair.first;
00125     }
00126 };
00127 
00128 
00129 
00134 template <class PairType>
00135 #if defined(XALAN_NO_NAMESPACES)
00136 struct select2nd : public unary_function<PairType, PairType::second_type>
00137 #else
00138 struct select2nd : public std::unary_function<PairType, PairType::second_type>
00139 #endif
00140 {
00141     typedef typename PairType   value_type;
00142 
00149     typename result_type
00150     operator()(const typename argument_type&    thePair) const
00151     {
00152         return thePair.second;
00153     }
00154 };
00155 
00156 #endif
00157 
00158 
00159 
00163 template <class T>
00164 #if defined(XALAN_NO_NAMESPACES)
00165 struct MapValueDeleteFunctor : public unary_function<const T::value_type&, void>
00166 #else
00167 struct MapValueDeleteFunctor : public std::unary_function<const typename T::value_type&, void>
00168 #endif
00169 {
00176     result_type
00177     operator()(argument_type    thePair) const
00178     {
00179         delete thePair.second;
00180     }
00181 };
00182 
00183 
00184 
00185 template<class T>
00186 MapValueDeleteFunctor<T>
00187 makeMapValueDeleteFunctor(const T&  /* theMap */)
00188 {
00189     return MapValueDeleteFunctor<T>();
00190 }
00191 
00192 
00193 
00194 template <class T>
00195 #if defined(XALAN_NO_NAMESPACES)
00196 struct MapKeyDeleteFunctor : public unary_function<const T::value_type&, void>
00197 #else
00198 struct MapKeyDeleteFunctor : public std::unary_function<const typename T::value_type&, void>
00199 #endif
00200 {
00207     result_type
00208     operator()(argument_type    thePair)
00209     {
00210         delete thePair.first;
00211     }
00212 };
00213 
00214 
00215 
00216 template<class T>
00217 MapKeyDeleteFunctor<T>
00218 makeMapKeyDeleteFunctor(const T&    /* theMap */)
00219 {
00220     return MapKeyDeleteFunctor<T>();
00221 }
00222 
00223 
00224 
00234 template<class T>
00235 #if defined(XALAN_NO_NAMESPACES)
00236 struct less_null_terminated_arrays : public binary_function<const T*, const T*, bool>
00237 #else
00238 struct less_null_terminated_arrays : public std::binary_function<const T*, const T*, bool>
00239 #endif
00240 {
00249     result_type
00250     operator()(
00251             first_argument_type     theLHS,
00252             second_argument_type    theRHS) const
00253     {
00254         while(*theLHS && *theRHS)
00255         {
00256             if (*theLHS != *theRHS)
00257             {
00258                 break;
00259             }
00260             else
00261             {
00262                 theLHS++;
00263                 theRHS++;
00264             }
00265         }
00266 
00267         return *theLHS < *theRHS ? true : false;
00268     }
00269 };
00270 
00271 
00272 
00273 template<class CollectionType, class DeleteFunctorType>
00274 class CollectionDeleteGuard
00275 {
00276 public:
00277 
00278     CollectionDeleteGuard(CollectionType&   theCollection) :
00279         m_collection(&theCollection)
00280     {
00281     }
00282 
00283     ~CollectionDeleteGuard()
00284     {
00285         if (m_collection != 0)
00286         {
00287 #if !defined(XALAN_NO_NAMESPACES)
00288             using std::for_each;
00289 #endif
00290 
00291             // Delete all of the objects in the temp vector.
00292             for_each(m_collection->begin(),
00293                      m_collection->end(),
00294                      DeleteFunctorType());
00295         }
00296     }
00297 
00298     void
00299     release()
00300     {
00301         m_collection = 0;
00302     }
00303 
00304 private:
00305 
00306     // Not implemented...
00307     CollectionDeleteGuard(const CollectionDeleteGuard<CollectionType, DeleteFunctorType>&);
00308 
00309     CollectionDeleteGuard<CollectionType, DeleteFunctorType>&
00310     operator=(const CollectionDeleteGuard<CollectionType, DeleteFunctorType>&);
00311 
00312     // Data members...
00313     CollectionType*     m_collection;
00314 };
00315 
00316 
00317 
00318 #endif  // STLHELPERS_HEADER_GUARD_1357924680

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