/usr/include/utilspp/clone_ptr.hpp is in libcurlpp-dev 0.7.3-6.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright (c) <2002-2009> <Jean-Philippe Barrette-LaPierre>
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (curlpp), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef UTILSPP_CLONEPTR_HPP
#define UTILSPP_CLONEPTR_HPP
#include <cassert>
#include <stdexcept>
namespace utilspp
{
// This class is meant to manage a pointer. This class will
// ensure that when we go out of scope, it will delete the
// pointer.
//
// However, contrary to the std::auto_ptr, instead of
// transfering the ownership on copy construction, it clones
// the content. This means that we can have STL containers
// that uses that class for managing the pointers.
//
// So, it means that the class we stores, needs a "clone"
// member.
template <typename T>
class clone_ptr
{
public:
clone_ptr() : value_(NULL) {}
// This constructor takes ownership of the pointer.
//
// Note that it isn't explicit. This might be a
// problem.
clone_ptr(T * value) : value_(value) {}
~clone_ptr() {if (value_) delete value_;}
// This is the default constructor that takes his
// value from cloning the content of the other
// clone_ptr.
clone_ptr(const clone_ptr & other)
{value_ = other->clone();}
T * operator->()
{
if (value_)
return value_;
throw std::runtime_error("using a null clone_ptr");
}
const T * operator->() const
{
assert(value_);
return value_;
}
T * get() { return value_; }
const T * get() const { return value_; }
// This just releases the pointer. It means that the
// pointer is no longer owned by the smart pointer.
T * release()
{
T * r = value_;
value_ = NULL;
return r;
}
private:
T * value_;
};
}
#endif
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