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livetrax/libs/glibmm2/glibmm/arrayhandle.h

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// -*- c++ -*-
#ifndef _GLIBMM_ARRAYHANDLE_H
#define _GLIBMM_ARRAYHANDLE_H
/* $Id$ */
/* Copyright (C) 2002 The gtkmm Development Team
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <glibmm/containerhandle_shared.h>
namespace Glib
{
namespace Container_Helpers
{
#ifndef DOXYGEN_SHOULD_SKIP_THIS
/* Count the number of elements in a 0-terminated sequence.
*/
template <class T> inline
size_t compute_array_size(const T* array)
{
const T* pend = array;
while(*pend)
++pend;
return (pend - array);
}
/* Allocate and fill a 0-terminated array. The size argument
* specifies the number of elements in the input sequence.
*/
template <class For, class Tr>
typename Tr::CType* create_array(For pbegin, size_t size, Tr)
{
typedef typename Tr::CType CType;
CType *const array = static_cast<CType*>(g_malloc((size + 1) * sizeof(CType)));
CType *const array_end = array + size;
for(CType* pdest = array; pdest != array_end; ++pdest)
{
// Use & to force a warning if the iterator returns a temporary object.
*pdest = Tr::to_c_type(*&*pbegin);
++pbegin;
}
*array_end = CType();
return array;
}
/* Convert from any container that supports forward
* iterators and has a size() method.
*/
template <class Tr, class Cont>
struct ArraySourceTraits
{
typedef typename Tr::CType CType;
static size_t get_size(const Cont& cont)
{ return cont.size(); }
static const CType* get_data(const Cont& cont, size_t size)
{ return Glib::Container_Helpers::create_array(cont.begin(), size, Tr()); }
static const Glib::OwnershipType initial_ownership = Glib::OWNERSHIP_SHALLOW;
};
/* Convert from a 0-terminated array. The Cont argument must be a pointer
* to the first element. Note that only arrays of the C type are supported.
*/
template <class Tr, class Cont>
struct ArraySourceTraits<Tr,Cont*>
{
typedef typename Tr::CType CType;
static size_t get_size(const CType* array)
{ return (array) ? Glib::Container_Helpers::compute_array_size(array) : 0; }
static const CType* get_data(const CType* array, size_t)
{ return array; }
static const Glib::OwnershipType initial_ownership = Glib::OWNERSHIP_NONE;
};
template <class Tr, class Cont>
struct ArraySourceTraits<Tr,const Cont*> : ArraySourceTraits<Tr,Cont*>
{};
/* Convert from a 0-terminated array. The Cont argument must be a pointer
* to the first element. Note that only arrays of the C type are supported.
* For consistency, the array must be 0-terminated, even though the array
* size is known at compile time.
*/
template <class Tr, class Cont, size_t N>
struct ArraySourceTraits<Tr,Cont[N]>
{
typedef typename Tr::CType CType;
static size_t get_size(const CType*)
{ return (N - 1); }
static const CType* get_data(const CType* array, size_t)
{ return array; }
static const Glib::OwnershipType initial_ownership = Glib::OWNERSHIP_NONE;
};
template <class Tr, class Cont, size_t N>
struct ArraySourceTraits<Tr,const Cont[N]> : ArraySourceTraits<Tr,Cont[N]>
{};
#endif /* DOXYGEN_SHOULD_SKIP_THIS */
/**
* @ingroup ContHelpers
*/
template <class Tr>
class ArrayHandleIterator
{
public:
typedef typename Tr::CppType CppType;
typedef typename Tr::CType CType;
typedef std::random_access_iterator_tag iterator_category;
typedef CppType value_type;
typedef ptrdiff_t difference_type;
typedef value_type reference;
typedef void pointer;
explicit inline ArrayHandleIterator(const CType* pos);
inline value_type operator*() const;
inline value_type operator[](difference_type offset) const;
inline ArrayHandleIterator<Tr> & operator++();
inline const ArrayHandleIterator<Tr> operator++(int);
// All this random access stuff is only there because STL algorithms
// usually have optimized specializations for random access iterators,
// and we don't want to give away efficiency for nothing.
//
inline ArrayHandleIterator<Tr> & operator+=(difference_type rhs);
inline ArrayHandleIterator<Tr> & operator-=(difference_type rhs);
inline const ArrayHandleIterator<Tr> operator+ (difference_type rhs) const;
inline const ArrayHandleIterator<Tr> operator- (difference_type rhs) const;
inline difference_type operator-(const ArrayHandleIterator<Tr>& rhs) const;
inline bool operator==(const ArrayHandleIterator<Tr>& rhs) const;
inline bool operator!=(const ArrayHandleIterator<Tr>& rhs) const;
inline bool operator< (const ArrayHandleIterator<Tr>& rhs) const;
inline bool operator> (const ArrayHandleIterator<Tr>& rhs) const;
inline bool operator<=(const ArrayHandleIterator<Tr>& rhs) const;
inline bool operator>=(const ArrayHandleIterator<Tr>& rhs) const;
private:
const CType* pos_;
};
} // namespace Container_Helpers
/** If a method takes this as an argument, or has this as a return type, then you can use a standard
* container such as std::list or std::vector.
* @ingroup ContHandles
*/
template < class T, class Tr = Glib::Container_Helpers::TypeTraits<T> >
class ArrayHandle
{
public:
typedef typename Tr::CppType CppType;
typedef typename Tr::CType CType;
typedef CppType value_type;
typedef size_t size_type;
typedef ptrdiff_t difference_type;
typedef Glib::Container_Helpers::ArrayHandleIterator<Tr> const_iterator;
typedef Glib::Container_Helpers::ArrayHandleIterator<Tr> iterator;
template <class Cont> inline
ArrayHandle(const Cont& container);
// Take over ownership of an array created by GTK+ functions.
inline ArrayHandle(const CType* array, size_t array_size, Glib::OwnershipType ownership);
inline ArrayHandle(const CType* array, Glib::OwnershipType ownership);
// Copying clears the ownership flag of the source handle.
inline ArrayHandle(const ArrayHandle<T,Tr>& other);
~ArrayHandle();
inline const_iterator begin() const;
inline const_iterator end() const;
template <class U> inline operator std::vector<U>() const;
template <class U> inline operator std::deque<U>() const;
template <class U> inline operator std::list<U>() const;
template <class Cont> inline
void assign_to(Cont& container) const;
template <class Out> inline
void copy(Out pdest) const;
inline const CType* data() const;
inline size_t size() const;
inline bool empty() const;
private:
size_t size_;
const CType* parray_;
mutable Glib::OwnershipType ownership_;
// No copy assignment.
ArrayHandle<T, Tr>& operator=(const ArrayHandle<T,Tr>&);
};
/** If a method takes this as an argument, or has this as a return type, then you can use a standard
* container such as std::list<Glib::ustring> or std::vector<Glib::ustring>.
* @ingroup ContHandles
*/
typedef ArrayHandle<Glib::ustring> StringArrayHandle;
/***************************************************************************/
/* Inline implementation */
/***************************************************************************/
#ifndef DOXYGEN_SHOULD_SKIP_THIS
namespace Container_Helpers
{
/**** Glib::Container_Helpers::ArrayHandleIterator<> ***********************/
template <class Tr> inline
ArrayHandleIterator<Tr>::ArrayHandleIterator(const CType* pos)
:
pos_ (pos)
{}
template <class Tr> inline
typename ArrayHandleIterator<Tr>::value_type ArrayHandleIterator<Tr>::operator*() const
{
return Tr::to_cpp_type(*pos_);
}
template <class Tr> inline
typename ArrayHandleIterator<Tr>::value_type
ArrayHandleIterator<Tr>::operator[](difference_type offset) const
{
return Tr::to_cpp_type(pos_[offset]);
}
template <class Tr> inline
ArrayHandleIterator<Tr>& ArrayHandleIterator<Tr>::operator++()
{
++pos_;
return *this;
}
template <class Tr> inline
const ArrayHandleIterator<Tr> ArrayHandleIterator<Tr>::operator++(int)
{
return ArrayHandleIterator<Tr>(pos_++);
}
template <class Tr> inline
ArrayHandleIterator<Tr>&
ArrayHandleIterator<Tr>::operator+=(typename ArrayHandleIterator<Tr>::difference_type rhs)
{
pos_ += rhs;
return *this;
}
template <class Tr> inline
ArrayHandleIterator<Tr>&
ArrayHandleIterator<Tr>::operator-=(typename ArrayHandleIterator<Tr>::difference_type rhs)
{
pos_ -= rhs;
return *this;
}
template <class Tr> inline
const ArrayHandleIterator<Tr>
ArrayHandleIterator<Tr>::operator+(typename ArrayHandleIterator<Tr>::difference_type rhs) const
{
return ArrayHandleIterator<Tr>(pos_ + rhs);
}
template <class Tr> inline
const ArrayHandleIterator<Tr>
ArrayHandleIterator<Tr>::operator-(typename ArrayHandleIterator<Tr>::difference_type rhs) const
{
return ArrayHandleIterator<Tr>(pos_ - rhs);
}
template <class Tr> inline
typename ArrayHandleIterator<Tr>::difference_type
ArrayHandleIterator<Tr>::operator-(const ArrayHandleIterator<Tr>& rhs) const
{
return (pos_ - rhs.pos_);
}
template <class Tr> inline
bool ArrayHandleIterator<Tr>::operator==(const ArrayHandleIterator<Tr>& rhs) const
{
return (pos_ == rhs.pos_);
}
template <class Tr> inline
bool ArrayHandleIterator<Tr>::operator!=(const ArrayHandleIterator<Tr>& rhs) const
{
return (pos_ != rhs.pos_);
}
template <class Tr> inline
bool ArrayHandleIterator<Tr>::operator<(const ArrayHandleIterator<Tr>& rhs) const
{
return (pos_ < rhs.pos_);
}
template <class Tr> inline
bool ArrayHandleIterator<Tr>::operator>(const ArrayHandleIterator<Tr>& rhs) const
{
return (pos_ > rhs.pos_);
}
template <class Tr> inline
bool ArrayHandleIterator<Tr>::operator<=(const ArrayHandleIterator<Tr>& rhs) const
{
return (pos_ <= rhs.pos_);
}
template <class Tr> inline
bool ArrayHandleIterator<Tr>::operator>=(const ArrayHandleIterator<Tr>& rhs) const
{
return (pos_ >= rhs.pos_);
}
} // namespace Container_Helpers
/**** Glib::ArrayHandle<> **************************************************/
template <class T, class Tr>
template <class Cont>
inline
ArrayHandle<T,Tr>::ArrayHandle(const Cont& container)
:
size_ (Glib::Container_Helpers::ArraySourceTraits<Tr,Cont>::get_size(container)),
parray_ (Glib::Container_Helpers::ArraySourceTraits<Tr,Cont>::get_data(container, size_)),
ownership_ (Glib::Container_Helpers::ArraySourceTraits<Tr,Cont>::initial_ownership)
{}
template <class T, class Tr> inline
ArrayHandle<T,Tr>::ArrayHandle(const typename ArrayHandle<T,Tr>::CType* array, size_t array_size,
Glib::OwnershipType ownership)
:
size_ (array_size),
parray_ (array),
ownership_ (ownership)
{}
template <class T, class Tr> inline
ArrayHandle<T,Tr>::ArrayHandle(const typename ArrayHandle<T,Tr>::CType* array,
Glib::OwnershipType ownership)
:
size_ ((array) ? Glib::Container_Helpers::compute_array_size(array) : 0),
parray_ (array),
ownership_ (ownership)
{}
template <class T, class Tr> inline
ArrayHandle<T,Tr>::ArrayHandle(const ArrayHandle<T,Tr>& other)
:
size_ (other.size_),
parray_ (other.parray_),
ownership_ (other.ownership_)
{
other.ownership_ = Glib::OWNERSHIP_NONE;
}
template <class T, class Tr>
ArrayHandle<T,Tr>::~ArrayHandle()
{
if(ownership_ != Glib::OWNERSHIP_NONE)
{
if(ownership_ != Glib::OWNERSHIP_SHALLOW)
{
// Deep ownership: release each container element.
const CType *const pend = parray_ + size_;
for(const CType* p = parray_; p != pend; ++p)
Tr::release_c_type(*p);
}
g_free(const_cast<CType*>(parray_));
}
}
template <class T, class Tr> inline
typename ArrayHandle<T,Tr>::const_iterator ArrayHandle<T,Tr>::begin() const
{
return Glib::Container_Helpers::ArrayHandleIterator<Tr>(parray_);
}
template <class T, class Tr> inline
typename ArrayHandle<T,Tr>::const_iterator ArrayHandle<T,Tr>::end() const
{
return Glib::Container_Helpers::ArrayHandleIterator<Tr>(parray_ + size_);
}
template <class T, class Tr>
template <class U>
inline
ArrayHandle<T,Tr>::operator std::vector<U>() const
{
#ifdef GLIBMM_HAVE_TEMPLATE_SEQUENCE_CTORS
return std::vector<U>(this->begin(), this->end());
#else
std::vector<U> temp;
temp.reserve(this->size());
Glib::Container_Helpers::fill_container(temp, this->begin(), this->end());
return temp;
#endif
}
template <class T, class Tr>
template <class U>
inline
ArrayHandle<T,Tr>::operator std::deque<U>() const
{
#ifdef GLIBMM_HAVE_TEMPLATE_SEQUENCE_CTORS
return std::deque<U>(this->begin(), this->end());
#else
std::deque<U> temp;
Glib::Container_Helpers::fill_container(temp, this->begin(), this->end());
return temp;
#endif
}
template <class T, class Tr>
template <class U>
inline
ArrayHandle<T,Tr>::operator std::list<U>() const
{
#ifdef GLIBMM_HAVE_TEMPLATE_SEQUENCE_CTORS
return std::list<U>(this->begin(), this->end());
#else
std::list<U> temp;
Glib::Container_Helpers::fill_container(temp, this->begin(), this->end());
return temp;
#endif
}
template <class T, class Tr>
template <class Cont>
inline
void ArrayHandle<T,Tr>::assign_to(Cont& container) const
{
#ifdef GLIBMM_HAVE_TEMPLATE_SEQUENCE_CTORS
container.assign(this->begin(), this->end());
#else
Cont temp;
Glib::Container_Helpers::fill_container(temp, this->begin(), this->end());
container.swap(temp);
#endif
}
template <class T, class Tr>
template <class Out>
inline
void ArrayHandle<T,Tr>::copy(Out pdest) const
{
std::copy(this->begin(), this->end(), pdest);
}
template <class T, class Tr> inline
const typename ArrayHandle<T,Tr>::CType* ArrayHandle<T,Tr>::data() const
{
return parray_;
}
template <class T, class Tr> inline
size_t ArrayHandle<T,Tr>::size() const
{
return size_;
}
template <class T, class Tr> inline
bool ArrayHandle<T,Tr>::empty() const
{
return (size_ == 0);
}
#endif /* DOXYGEN_SHOULD_SKIP_THIS */
} // namespace Glib
#endif /* _GLIBMM_ARRAYHANDLE_H */