--- /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 _ConstVolatileVoidPointerShim
+{ _ConstVolatileVoidPointerShim(const volatile void*); };
+
+//The dispatch functions:
+struct _VoidPointerShim
+{ _VoidPointerShim(void*); };
+struct _ConstVoidPointerShim
+{ _ConstVoidPointerShim(const void*); };
+struct _VolatileVoidPointerShim
+{ _VolatileVoidPointerShim(volatile void*); };
+
+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);
+
+template <class _Tp>
+struct _StorageType {
+ typedef typename __type_traits<_Tp>::is_POD_type _PODType;
+ static _Tp __null_rep();
+
+ 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
+};
+
+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:
+ typedef typename _IsSTLportClass<_Compare>::_Ret _STLportLess;
+ enum { is_default_less = __type2bool<_STLportLess>::_Ret };
+
+ typedef typename __select<is_default_less, _SType, _Tp>::_Ret _KeyStorageType;
+ enum { ptr_type = _StorageTypeInfo::use_const_volatile_void_ptr };
+ 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 */
projects / polintos / scott / priv.git / blobdiff