+++ /dev/null
-/*
- * Copyright (c) 2003
- * Francois Dumont
- *
- * This material is provided "as is", with absolutely no warranty expressed
- * or implied. Any use is at your own risk.
- *
- * Permission to use or copy this software for any purpose is hereby granted
- * without fee, provided the above notices are retained on all copies.
- * Permission to modify the code and to distribute modified code is granted,
- * provided the above notices are retained, and a notice that the code was
- * modified is included with the above copyright notice.
- *
- */
-
-/* NOTE: This is an internal header file, included by other STL headers.
- * You should not attempt to use it directly.
- */
-
-#ifndef _STLP_POINTERS_SPEC_TOOLS_H
-#define _STLP_POINTERS_SPEC_TOOLS_H
-
-#ifndef _STLP_TYPE_TRAITS_H
-# include <stl/type_traits.h>
-#endif
-
-_STLP_BEGIN_NAMESPACE
-
-//Some usefull declarations:
-template <class _Tp> struct less;
-
-_STLP_MOVE_TO_PRIV_NAMESPACE
-
-template <class _StorageT, class _ValueT, class _BinaryPredicate>
-struct _BinaryPredWrapper;
-
-/*
- * Since the compiler only allows at most one non-trivial
- * implicit conversion we can make use of a shim class to
- * be sure that functions below doesn't accept classes with
- * implicit pointer conversion operators
- */
-struct _VoidPointerShim
-{ _VoidPointerShim(void*); };
-struct _ConstVoidPointerShim
-{ _ConstVoidPointerShim(const void*); };
-struct _VolatileVoidPointerShim
-{ _VolatileVoidPointerShim(volatile void*); };
-struct _ConstVolatileVoidPointerShim
-{ _ConstVolatileVoidPointerShim(const volatile void*); };
-
-//The dispatch functions:
-template <class _Tp>
-char _UseVoidPtrStorageType(const __false_type& /*POD*/, const _Tp&);
-char _UseVoidPtrStorageType(const __true_type& /*POD*/, ...);
-char* _UseVoidPtrStorageType(const __true_type& /*POD*/, _VoidPointerShim);
-
-template <class _Tp>
-char _UseConstVoidPtrStorageType(const __false_type& /*POD*/, const _Tp&);
-char _UseConstVoidPtrStorageType(const __true_type& /*POD*/, ...);
-char* _UseConstVoidPtrStorageType(const __true_type& /*POD*/, _ConstVoidPointerShim);
-
-template <class _Tp>
-char _UseVolatileVoidPtrStorageType(const __false_type& /*POD*/, const _Tp&);
-char _UseVolatileVoidPtrStorageType(const __true_type& /*POD*/, ...);
-char* _UseVolatileVoidPtrStorageType(const __true_type& /*POD*/, _VolatileVoidPointerShim);
-
-template <class _Tp>
-char _UseConstVolatileVoidPtrStorageType(const __false_type& /*POD*/, const _Tp&);
-char _UseConstVolatileVoidPtrStorageType(const __true_type& /*POD*/, ...);
-char* _UseConstVolatileVoidPtrStorageType(const __true_type& /*POD*/, _ConstVolatileVoidPointerShim);
-
-#if defined (_STLP_CLASS_PARTIAL_SPECIALIZATION)
-/* Thanks to class partial specialization the pointer specialization feature can even be used in
- * presence of incomplete type:
- * struct MyStruct {
- * typedef vector<MyStruct> MyStructContainer;
- * typedef MyStructContainer::iterator MyStructIterator;
- * };
- */
-
-template <class _Tp>
-struct _StorageType {
- typedef _Tp _QualifiedType;
- typedef _Tp _Type;
- enum { use_const_volatile_void_ptr = 0 };
-};
-
-template <class _Tp>
-struct _StorageType<_Tp*> {
- // Even if we detect a pointer type we use dispatch function to consider if it can be stored as a void*.
- // For instance function pointer might not necessarily be convertible to void*.
- enum { use_void_ptr = (sizeof(_UseVoidPtrStorageType(__true_type(),
- __STATIC_CAST(_Tp*, 0))) == sizeof(char*)) };
- enum { use_const_volatile_void_ptr = use_void_ptr };
- typedef typename __select<use_void_ptr,
- void*,
- _Tp*>::_Ret _QualifiedType;
- typedef _QualifiedType _Type;
-};
-
-template <class _Tp>
-struct _StorageType<_Tp const*> {
- enum { use_void_ptr = (sizeof(_UseConstVoidPtrStorageType(__true_type(),
- __STATIC_CAST(const _Tp*, 0))) == sizeof(char*)) };
- enum { use_const_volatile_void_ptr = use_void_ptr };
- typedef typename __select<use_void_ptr,
- const void*,
- const _Tp*>::_Ret _QualifiedType;
- typedef typename __select<use_void_ptr,
- void*,
- const _Tp*>::_Ret _Type;
-};
-
-template <class _Tp>
-struct _StorageType<_Tp volatile*> {
- enum { use_void_ptr = (sizeof(_UseVolatileVoidPtrStorageType(__true_type(),
- __STATIC_CAST(_Tp volatile*, 0))) == sizeof(char*)) };
- enum { use_const_volatile_void_ptr = use_void_ptr };
- typedef typename __select<use_void_ptr,
- volatile void*,
- volatile _Tp*>::_Ret _QualifiedType;
- typedef typename __select<use_void_ptr,
- void*,
- volatile _Tp*>::_Ret _Type;
-};
-
-template <class _Tp>
-struct _StorageType<_Tp const volatile*> {
- enum { use_void_ptr = (sizeof(_UseConstVolatileVoidPtrStorageType(__true_type(),
- __STATIC_CAST(_Tp const volatile*, 0))) == sizeof(char*)) };
- enum { use_const_volatile_void_ptr = use_void_ptr };
- typedef typename __select<use_void_ptr,
- const volatile void*,
- const volatile _Tp*>::_Ret _QualifiedType;
- typedef typename __select<use_void_ptr,
- void*,
- const volatile _Tp*>::_Ret _Type;
-};
-#else
-template <class _Tp>
-struct _StorageType {
- typedef typename __type_traits<_Tp>::is_POD_type _PODType;
-
-#if !defined (__BORLANDC__) || (__BORLANDC__ != 0x560)
- static _Tp __null_rep();
-#else
- static _Tp __null_rep;
-#endif
- enum { use_void_ptr = (sizeof(_UseVoidPtrStorageType(_PODType(), __null_rep())) == sizeof(char*)) };
- enum { use_const_void_ptr = (sizeof(_UseConstVoidPtrStorageType(_PODType(), __null_rep())) == sizeof(char*)) };
- enum { use_volatile_void_ptr = (sizeof(_UseVolatileVoidPtrStorageType(_PODType(), __null_rep())) == sizeof(char*)) };
- enum { use_const_volatile_void_ptr = (sizeof(_UseConstVolatileVoidPtrStorageType(_PODType(), __null_rep())) == sizeof(char*)) };
-
- typedef typename __select<!use_const_volatile_void_ptr,
- _Tp,
- typename __select<use_void_ptr,
- void*,
- typename __select<use_const_void_ptr,
- const void*,
- typename __select<use_volatile_void_ptr,
- volatile void*,
- const volatile void*>::_Ret >::_Ret >::_Ret >::_Ret _QualifiedType;
-
-#if !defined (_STLP_CLASS_PARTIAL_SPECIALIZATION)
- /* If the compiler do not support the iterator_traits structure we cannot wrap
- * iterators pass to container template methods. The iterator dereferenced value
- * has to be storable without any cast in the chosen storage type. To guaranty
- * that the void pointer has to be correctly qualified.
- */
- typedef _QualifiedType _Type;
-#else
- /* With iterator_traits we can wrap passed iterators and make the necessary casts.
- * We can always use a simple void* storage type:
- */
- typedef typename __select<use_const_volatile_void_ptr,
- void*,
- _Tp>::_Ret _Type;
-#endif
-};
-#endif
-
-template <class _Tp, class _Compare>
-struct _AssocStorageTypes {
- typedef _StorageType<_Tp> _StorageTypeInfo;
- typedef typename _StorageTypeInfo::_Type _SType;
-
- //We need to also check that the comparison functor used to instanciate the assoc container
- //is the default Standard less implementation:
- enum { ptr_type = _StorageTypeInfo::use_const_volatile_void_ptr };
- typedef typename _IsSTLportClass<_Compare>::_Ret _STLportLess;
- enum { is_default_less = __type2bool<_STLportLess>::_Ret };
- typedef typename __select<is_default_less, _SType, _Tp>::_Ret _KeyStorageType;
- typedef typename __select<is_default_less && ptr_type,
- _BinaryPredWrapper<_KeyStorageType, _Tp, _Compare>,
- _Compare>::_Ret _CompareStorageType;
-};
-
-
-#if defined (_STLP_CLASS_PARTIAL_SPECIALIZATION)
-/*
- * Base struct to deal with qualifiers
- */
-template <class _StorageT, class _QualifiedStorageT>
-struct _VoidCastTraitsAux {
- typedef _QualifiedStorageT void_cv_type;
- typedef _StorageT void_type;
-
- static void_type * uncv_ptr(void_cv_type *__ptr)
- { return __ptr; }
- static void_type const* uncv_cptr(void_cv_type const*__ptr)
- { return __ptr; }
- static void_type ** uncv_pptr(void_cv_type **__ptr)
- { return __ptr; }
- static void_type & uncv_ref(void_cv_type & __ref)
- { return __ref; }
- static void_type const& uncv_cref(void_cv_type const& __ref)
- { return __ref; }
- static void_cv_type* cv_ptr(void_type *__ptr)
- { return __ptr; }
- static void_cv_type const* cv_cptr(void_type const*__ptr)
- { return __ptr; }
- static void_cv_type ** cv_pptr(void_type **__ptr)
- { return __ptr; }
- static void_cv_type & cv_ref(void_type & __ref)
- { return __ref; }
- static void_cv_type const& cv_cref(void_type const& __ref)
- { return __ref; }
-};
-
-template <class _VoidCVType>
-struct _VoidCastTraitsAuxBase {
- typedef _VoidCVType* void_cv_type;
- typedef void* void_type;
-
- static void_type* uncv_ptr(void_cv_type *__ptr)
- { return __CONST_CAST(void_type*, __ptr); }
- static void_type const* uncv_cptr(void_cv_type const*__ptr)
- { return __CONST_CAST(void_type const*, __ptr); }
- static void_type** uncv_pptr(void_cv_type **__ptr)
- { return __CONST_CAST(void_type**, __ptr); }
- static void_type& uncv_ref(void_cv_type &__ref)
- { return __CONST_CAST(void_type&, __ref); }
- static void_type const& uncv_cref(void_cv_type const& __ptr)
- { return __CONST_CAST(void_type const&, __ptr); }
- // The reverse versions
- static void_cv_type * cv_ptr(void_type *__ptr)
- { return __CONST_CAST(void_cv_type *, __ptr); }
- static void_cv_type const* cv_cptr(void_type const*__ptr)
- { return __CONST_CAST(void_cv_type const*, __ptr); }
- static void_cv_type ** cv_pptr(void_type **__ptr)
- { return __CONST_CAST(void_cv_type**, __ptr); }
- static void_cv_type & cv_ref(void_type &__ref)
- { return __CONST_CAST(void_cv_type &, __ref); }
- static void_cv_type const& cv_cref(void_type const& __ref)
- { return __CONST_CAST(void_cv_type const&, __ref); }
-};
-
-_STLP_TEMPLATE_NULL
-struct _VoidCastTraitsAux<void*, const void*> : _VoidCastTraitsAuxBase<void const>
-{};
-_STLP_TEMPLATE_NULL
-struct _VoidCastTraitsAux<void*, volatile void*> : _VoidCastTraitsAuxBase<void volatile>
-{};
-_STLP_TEMPLATE_NULL
-struct _VoidCastTraitsAux<void*, const volatile void*> : _VoidCastTraitsAuxBase<void const volatile>
-{};
-
-template <class _StorageT, class _ValueT>
-struct _CastTraits {
- typedef _ValueT value_type;
- typedef typename _StorageType<_ValueT>::_QualifiedType _QualifiedStorageT;
- typedef _VoidCastTraitsAux<_StorageT, _QualifiedStorageT> cv_traits;
- typedef typename cv_traits::void_type void_type;
- typedef typename cv_traits::void_cv_type void_cv_type;
-
- static value_type * to_value_type_ptr(void_type *__ptr)
- { return __REINTERPRET_CAST(value_type *, cv_traits::cv_ptr(__ptr)); }
- static value_type const* to_value_type_cptr(void_type const*__ptr)
- { return __REINTERPRET_CAST(value_type const*, cv_traits::cv_cptr(__ptr)); }
- static value_type ** to_value_type_pptr(void_type **__ptr)
- { return __REINTERPRET_CAST(value_type **, cv_traits::cv_pptr(__ptr)); }
- static value_type & to_value_type_ref(void_type &__ref)
- { return __REINTERPRET_CAST(value_type &, cv_traits::cv_ref(__ref)); }
- static value_type const& to_value_type_cref(void_type const& __ptr)
- { return __REINTERPRET_CAST(value_type const&, cv_traits::cv_cref(__ptr)); }
- // Reverse versions
- static void_type * to_storage_type_ptr(value_type *__ptr)
- { return cv_traits::uncv_ptr(__REINTERPRET_CAST(void_cv_type *, __ptr)); }
- static void_type const* to_storage_type_cptr(value_type const*__ptr)
- { return cv_traits::uncv_cptr(__REINTERPRET_CAST(void_cv_type const*, __ptr)); }
- static void_type ** to_storage_type_pptr(value_type **__ptr)
- { return cv_traits::uncv_pptr(__REINTERPRET_CAST(void_cv_type **, __ptr)); }
- static void_type const& to_storage_type_cref(value_type const& __ref)
- { return cv_traits::uncv_cref(__REINTERPRET_CAST(void_cv_type const&, __ref)); }
-
- //Method used to treat set container template method extension
- static void_type const& to_storage_type_crefT(value_type const& __ref)
- { return to_storage_type_cref(__ref); }
-};
-
-template <class _Tp>
-struct _CastTraits<_Tp, _Tp> {
- typedef _Tp storage_type;
- typedef _Tp value_type;
-
- static value_type * to_value_type_ptr(storage_type *__ptr)
- { return __ptr; }
- static value_type const* to_value_type_cptr(storage_type const*__ptr)
- { return __ptr; }
- static value_type ** to_value_type_pptr(storage_type **__ptr)
- { return __ptr; }
- static value_type & to_value_type_ref(storage_type &__ref)
- { return __ref; }
- static value_type const& to_value_type_cref(storage_type const&__ref)
- { return __ref; }
- // Reverse versions
- static storage_type * to_storage_type_ptr(value_type *__ptr)
- { return __ptr; }
- static storage_type const* to_storage_type_cptr(value_type const*__ptr)
- { return __ptr; }
- static storage_type ** to_storage_type_pptr(value_type **__ptr)
- { return __ptr; }
- static storage_type const& to_storage_type_cref(value_type const& __ref)
- { return __ref; }
-
- //Method used to treat set container template method extension
- template <class _Tp1>
- static _Tp1 const& to_storage_type_crefT(_Tp1 const& __ref)
- { return __ref; }
-};
-
-#define _STLP_USE_ITERATOR_WRAPPER
-
-template <class _StorageT, class _ValueT, class _Iterator>
-struct _IteWrapper {
- typedef _CastTraits<_StorageT, _ValueT> cast_traits;
- typedef iterator_traits<_Iterator> _IteTraits;
-
- typedef typename _IteTraits::iterator_category iterator_category;
- typedef _StorageT value_type;
- typedef typename _IteTraits::difference_type difference_type;
- typedef value_type* pointer;
- typedef value_type const& const_reference;
- //This wrapper won't be used for input so to avoid surprise
- //the reference type will be a const reference:
- typedef const_reference reference;
-
- typedef _IteWrapper<_StorageT, _ValueT, _Iterator> _Self;
- typedef _Self _Ite;
-
- _IteWrapper(_Iterator &__ite) : _M_ite(__ite) {}
-
- const_reference operator*() const { return cast_traits::to_storage_type_cref(*_M_ite); }
-
- _Self& operator= (_Self const& __rhs) {
- _M_ite = __rhs._M_ite;
- return *this;
- }
-
- _Self& operator++() {
- ++_M_ite;
- return *this;
- }
-
- _Self& operator--() {
- --_M_ite;
- return *this;
- }
-
- _Self& operator += (difference_type __offset) {
- _M_ite += __offset;
- return *this;
- }
- difference_type operator -(_Self const& __other) const
- { return _M_ite - __other._M_ite; }
-
- bool operator == (_Self const& __other) const
- { return _M_ite == __other._M_ite; }
-
- bool operator != (_Self const& __other) const
- { return _M_ite != __other._M_ite; }
-
- bool operator < (_Self const& __rhs) const
- { return _M_ite < __rhs._M_ite; }
-
-private:
- _Iterator _M_ite;
-};
-
-template <class _Tp, class _Iterator>
-struct _IteWrapper<_Tp, _Tp, _Iterator>
-{ typedef _Iterator _Ite; };
-
-#else
-
-/*
- * In this config the storage type is qualified in respect of the
- * value_type qualification. Simple reinterpret_cast is enough.
- */
-template <class _StorageT, class _ValueT>
-struct _CastTraits {
- typedef _StorageT storage_type;
- typedef _ValueT value_type;
-
- static value_type * to_value_type_ptr(storage_type *__ptr)
- { return __REINTERPRET_CAST(value_type*, __ptr); }
- static value_type const* to_value_type_cptr(storage_type const*__ptr)
- { return __REINTERPRET_CAST(value_type const*, __ptr); }
- static value_type ** to_value_type_pptr(storage_type **__ptr)
- { return __REINTERPRET_CAST(value_type **, __ptr); }
- static value_type & to_value_type_ref(storage_type &__ref)
- { return __REINTERPRET_CAST(value_type&, __ref); }
- static value_type const& to_value_type_cref(storage_type const&__ref)
- { return __REINTERPRET_CAST(value_type const&, __ref); }
- // Reverse versions
- static storage_type * to_storage_type_ptr(value_type *__ptr)
- { return __REINTERPRET_CAST(storage_type*, __ptr); }
- static storage_type const* to_storage_type_cptr(value_type const*__ptr)
- { return __REINTERPRET_CAST(storage_type const*, __ptr); }
- static storage_type ** to_storage_type_pptr(value_type **__ptr)
- { return __REINTERPRET_CAST(storage_type **, __ptr); }
- static storage_type const& to_storage_type_cref(value_type const&__ref)
- { return __REINTERPRET_CAST(storage_type const&, __ref); }
- template <class _Tp1>
- static _Tp1 const& to_storage_type_crefT(_Tp1 const& __ref)
- { return __ref; }
-};
-
-#endif
-
-//Wrapper functors:
-template <class _StorageT, class _ValueT, class _UnaryPredicate>
-struct _UnaryPredWrapper {
- typedef _CastTraits<_StorageT, _ValueT> cast_traits;
-
- _UnaryPredWrapper (_UnaryPredicate const& __pred) : _M_pred(__pred) {}
-
- bool operator () (_StorageT const& __ref) const
- { return _M_pred(cast_traits::to_value_type_cref(__ref)); }
-
-private:
- _UnaryPredicate _M_pred;
-};
-
-template <class _StorageT, class _ValueT, class _BinaryPredicate>
-struct _BinaryPredWrapper {
- typedef _CastTraits<_StorageT, _ValueT> cast_traits;
-
- _BinaryPredWrapper () {}
- _BinaryPredWrapper (_BinaryPredicate const& __pred) : _M_pred(__pred) {}
-
- _BinaryPredicate get_pred() const { return _M_pred; }
-
- bool operator () (_StorageT const& __fst, _StorageT const& __snd) const
- { return _M_pred(cast_traits::to_value_type_cref(__fst), cast_traits::to_value_type_cref(__snd)); }
-
- //Cast operator used to transparently access underlying predicate
- //in set::key_comp() method
- operator _BinaryPredicate() const
- { return _M_pred; }
-
-private:
- _BinaryPredicate _M_pred;
-};
-
-_STLP_MOVE_TO_STD_NAMESPACE
-
-_STLP_END_NAMESPACE
-
-#endif /* _STLP_POINTERS_SPEC_TOOLS_H */
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