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152 lines
3.5 KiB
152 lines
3.5 KiB
// -*- Mode: C++; tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
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// vim:tabstop=4:shiftwidth=4:expandtab:
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/*
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* Copyright (C) 2004-2008 Wu Yongwei <adah at users dot sourceforge dot net>
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*
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* This software is provided 'as-is', without any express or implied
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* warranty. In no event will the authors be held liable for any
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* damages arising from the use of this software.
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*
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* Permission is granted to anyone to use this software for any purpose,
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* including commercial applications, and to alter it and redistribute
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* it freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you must
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* not claim that you wrote the original software. If you use this
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* software in a product, an acknowledgement in the product
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* documentation would be appreciated but is not required.
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* 2. Altered source versions must be plainly marked as such, and must
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* not be misrepresented as being the original software.
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* 3. This notice may not be removed or altered from any source
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* distribution.
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*
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* This file is part of Stones of Nvwa:
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* http://sourceforge.net/projects/nvwa
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*
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*/
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/*!
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* \file cont_ptr_utils.h
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* \ingroup QxMemLeak
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*
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* Utility functors for containers of pointers (adapted from Scott
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* Meyers' <em>Effective STL</em>).
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*
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* \version 1.4, 2007/09/12
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* \author Wu Yongwei
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*
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*/
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#ifndef QT_NO_DEBUG
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#ifndef _QX_MODE_RELEASE
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#if _QX_USE_MEM_LEAK_DETECTION
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#ifndef _CONT_PTR_UTILS_H
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#define _CONT_PTR_UTILS_H
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#ifdef _MSC_VER
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#pragma once
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#endif
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namespace qx {
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namespace memory {
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/**
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* Functor to return objects pointed by a container of pointers.
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*
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* A typical usage might be like:
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* @code
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* vector<Object*> v;
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* ...
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* transform(v.begin(), v.end(),
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* ostream_iterator<Object>(cout, " "),
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* dereference());
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* @endcode
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*/
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struct QX_DLL_EXPORT dereference
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{
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template <typename _Tp>
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const _Tp& operator()(const _Tp* __ptr) const
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{
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return *__ptr;
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}
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};
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/**
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* Functor to compare objects pointed by a container of pointers.
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*
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* @code
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* vector<Object*> v;
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* ...
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* sort(v.begin(), v.end(), dereference_less());
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* @endcode
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* or
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* @code
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* set<Object*, dereference_less> s;
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* @endcode
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*/
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struct QX_DLL_EXPORT dereference_less
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{
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template <typename _Pointer>
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bool operator()(_Pointer __ptr1, _Pointer __ptr2) const
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{
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return *__ptr1 < *__ptr2;
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}
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};
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/**
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* Functor to delete objects pointed by a container of pointers.
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*
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* A typical usage might be like:
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* @code
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* list<Object*> l;
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* ...
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* for_each(l.begin(), l.end(), delete_object());
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* @endcode
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*/
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struct QX_DLL_EXPORT delete_object
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{
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template <typename _Pointer>
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void operator()(_Pointer __ptr) const
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{
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delete __ptr;
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}
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};
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/**
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* Functor to output objects pointed by a container of pointers.
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*
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* A typical usage might be like:
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* @code
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* list<Object*> l;
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* ...
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* for_each(l.begin(), l.end(), output_object<ostream>(cout, " "));
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* @endcode
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*/
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template <typename _OutputStrm, typename _StringType = const char*>
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struct output_object
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{
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output_object(_OutputStrm& __outs, const _StringType& __sep)
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: _M_outs(__outs), _M_sep(__sep)
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{}
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template <typename _Tp>
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void operator()(const _Tp* __ptr) const
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{
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_M_outs << *__ptr << _M_sep;
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}
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private:
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_OutputStrm& _M_outs;
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_StringType _M_sep;
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};
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} // namespace memory
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} // namespace qx
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#endif // _CONT_PTR_UTILS_H
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#endif // _QX_USE_MEM_LEAK_DETECTION
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#endif // _QX_MODE_RELEASE
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#endif // QT_NO_DEBUG
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