[apple/javascriptcore.git] / wtf / HashIterators.h

// -*- mode: c++; c-basic-offset: 4 -*-
/*
 * Copyright (C) 2007 Apple Inc.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
 */

#ifndef WTF_HashIterators_h
#define WTF_HashIterators_h

namespace WTF {

    template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableConstKeysIterator;
    template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableConstValuesIterator;
    template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableKeysIterator;
    template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableValuesIterator;

    template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableConstIteratorAdapter<HashTableType, std::pair<KeyType, MappedType> > {
    private:
        typedef std::pair<KeyType, MappedType> ValueType;
    public:
        typedef HashTableConstKeysIterator<HashTableType, KeyType, MappedType> Keys;
        typedef HashTableConstValuesIterator<HashTableType, KeyType, MappedType> Values;

        HashTableConstIteratorAdapter(const typename HashTableType::const_iterator& impl) : m_impl(impl) {}

        const ValueType* get() const { return (const ValueType*)m_impl.get(); }
        const ValueType& operator*() const { return *get(); }
        const ValueType* operator->() const { return get(); }

        HashTableConstIteratorAdapter& operator++() { ++m_impl; return *this; }
        // postfix ++ intentionally omitted

        Keys keys() { return Keys(*this); }
        Values values() { return Values(*this); }

        typename HashTableType::const_iterator m_impl;
    };

    template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableIteratorAdapter<HashTableType, std::pair<KeyType, MappedType> > {
    private:
        typedef std::pair<KeyType, MappedType> ValueType;
    public:
        typedef HashTableKeysIterator<HashTableType, KeyType, MappedType> Keys;
        typedef HashTableValuesIterator<HashTableType, KeyType, MappedType> Values;

        HashTableIteratorAdapter(const typename HashTableType::iterator& impl) : m_impl(impl) {}

        ValueType* get() const { return (ValueType*)m_impl.get(); }
        ValueType& operator*() const { return *get(); }
        ValueType* operator->() const { return get(); }

        HashTableIteratorAdapter& operator++() { ++m_impl; return *this; }
        // postfix ++ intentionally omitted

        operator HashTableConstIteratorAdapter<HashTableType, ValueType>() {
            typename HashTableType::const_iterator i = m_impl;
            return i;
        }

        Keys keys() { return Keys(*this); }
        Values values() { return Values(*this); }

        typename HashTableType::iterator m_impl;
    };

    template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableConstKeysIterator {
    private:
        typedef HashTableConstIteratorAdapter<HashTableType, std::pair<KeyType, MappedType> > ConstIterator;

    public:
        HashTableConstKeysIterator(const ConstIterator& impl) : m_impl(impl) {}
        
        const KeyType* get() const { return &(m_impl.get()->first); }
        const KeyType& operator*() const { return *get(); }
        const KeyType* operator->() const { return get(); }

        HashTableConstKeysIterator& operator++() { ++m_impl; return *this; }
        // postfix ++ intentionally omitted

        ConstIterator m_impl;
    };

    template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableConstValuesIterator {
    private:
        typedef HashTableConstIteratorAdapter<HashTableType, std::pair<KeyType, MappedType> > ConstIterator;

    public:
        HashTableConstValuesIterator(const ConstIterator& impl) : m_impl(impl) {}
        
        const MappedType* get() const { return &(m_impl.get()->second); }
        const MappedType& operator*() const { return *get(); }
        const MappedType* operator->() const { return get(); }

        HashTableConstValuesIterator& operator++() { ++m_impl; return *this; }
        // postfix ++ intentionally omitted

        ConstIterator m_impl;
    };

    template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableKeysIterator {
    private:
        typedef HashTableIteratorAdapter<HashTableType, std::pair<KeyType, MappedType> > Iterator;
        typedef HashTableConstIteratorAdapter<HashTableType, std::pair<KeyType, MappedType> > ConstIterator;

    public:
        HashTableKeysIterator(const Iterator& impl) : m_impl(impl) {}
        
        KeyType* get() const { return &(m_impl.get()->first); }
        KeyType& operator*() const { return *get(); }
        KeyType* operator->() const { return get(); }

        HashTableKeysIterator& operator++() { ++m_impl; return *this; }
        // postfix ++ intentionally omitted

        operator HashTableConstKeysIterator<HashTableType, KeyType, MappedType>() {
            ConstIterator i = m_impl;
            return i;
        }

        Iterator m_impl;
    };

    template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableValuesIterator {
    private:
        typedef HashTableIteratorAdapter<HashTableType, std::pair<KeyType, MappedType> > Iterator;
        typedef HashTableConstIteratorAdapter<HashTableType, std::pair<KeyType, MappedType> > ConstIterator;

    public:
        HashTableValuesIterator(const Iterator& impl) : m_impl(impl) {}
        
        MappedType* get() const { return &(m_impl.get()->second); }
        MappedType& operator*() const { return *get(); }
        MappedType* operator->() const { return get(); }

        HashTableValuesIterator& operator++() { ++m_impl; return *this; }
        // postfix ++ intentionally omitted

        operator HashTableConstValuesIterator<HashTableType, KeyType, MappedType>() {
            ConstIterator i = m_impl;
            return i;
        }

        Iterator m_impl;
    };

    template<typename T, typename U, typename V>
        inline bool operator==(const HashTableConstKeysIterator<T, U, V>& a, const HashTableConstKeysIterator<T, U, V>& b)
    {
        return a.m_impl == b.m_impl;
    }

    template<typename T, typename U, typename V>
        inline bool operator!=(const HashTableConstKeysIterator<T, U, V>& a, const HashTableConstKeysIterator<T, U, V>& b)
    {
        return a.m_impl != b.m_impl;
    }

    template<typename T, typename U, typename V>
        inline bool operator==(const HashTableConstValuesIterator<T, U, V>& a, const HashTableConstValuesIterator<T, U, V>& b)
    {
        return a.m_impl == b.m_impl;
    }

    template<typename T, typename U, typename V>
        inline bool operator!=(const HashTableConstValuesIterator<T, U, V>& a, const HashTableConstValuesIterator<T, U, V>& b)
    {
        return a.m_impl != b.m_impl;
    }

    template<typename T, typename U, typename V>
        inline bool operator==(const HashTableKeysIterator<T, U, V>& a, const HashTableKeysIterator<T, U, V>& b)
    {
        return a.m_impl == b.m_impl;
    }

    template<typename T, typename U, typename V>
        inline bool operator!=(const HashTableKeysIterator<T, U, V>& a, const HashTableKeysIterator<T, U, V>& b)
    {
        return a.m_impl != b.m_impl;
    }

    template<typename T, typename U, typename V>
        inline bool operator==(const HashTableValuesIterator<T, U, V>& a, const HashTableValuesIterator<T, U, V>& b)
    {
        return a.m_impl == b.m_impl;
    }

    template<typename T, typename U, typename V>
        inline bool operator!=(const HashTableValuesIterator<T, U, V>& a, const HashTableValuesIterator<T, U, V>& b)
    {
        return a.m_impl != b.m_impl;
    }


} // namespace WTF

#endif // WTF_HashIterators_h
Commit	Line	Data
b37bf2e1 A	1	// -- mode: c++; c-basic-offset: 4 --
	2	/*
	3	* Copyright (C) 2007 Apple Inc. All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
	13	*
	14	* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
	15	* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	16	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	17	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
	18	* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
	19	* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
	20	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
	21	* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
	22	* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	23	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	24	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	25	*/
	26
	27	#ifndef WTF_HashIterators_h
	28	#define WTF_HashIterators_h
	29
	30	namespace WTF {
	31
	32	template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableConstKeysIterator;
	33	template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableConstValuesIterator;
	34	template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableKeysIterator;
	35	template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableValuesIterator;
	36
	37	template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableConstIteratorAdapter<HashTableType, std::pair<KeyType, MappedType> > {
	38	private:
	39	typedef std::pair<KeyType, MappedType> ValueType;
	40	public:
	41	typedef HashTableConstKeysIterator<HashTableType, KeyType, MappedType> Keys;
	42	typedef HashTableConstValuesIterator<HashTableType, KeyType, MappedType> Values;
	43
	44	HashTableConstIteratorAdapter(const typename HashTableType::const_iterator& impl) : m_impl(impl) {}
	45
	46	const ValueType* get() const { return (const ValueType*)m_impl.get(); }
	47	const ValueType& operator() const { return get(); }
	48	const ValueType* operator->() const { return get(); }
	49
	50	HashTableConstIteratorAdapter& operator++() { ++m_impl; return *this; }
	51	// postfix ++ intentionally omitted
	52
	53	Keys keys() { return Keys(*this); }
	54	Values values() { return Values(*this); }
	55
	56	typename HashTableType::const_iterator m_impl;
	57	};
	58
	59	template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableIteratorAdapter<HashTableType, std::pair<KeyType, MappedType> > {
	60	private:
	61	typedef std::pair<KeyType, MappedType> ValueType;
	62	public:
	63	typedef HashTableKeysIterator<HashTableType, KeyType, MappedType> Keys;
	64	typedef HashTableValuesIterator<HashTableType, KeyType, MappedType> Values;
65
66	HashTableIteratorAdapter(const typename HashTableType::iterator& impl) : m_impl(impl) {}
67
68	ValueType* get() const { return (ValueType*)m_impl.get(); }
69	ValueType& operator() const { return get(); }
70	ValueType* operator->() const { return get(); }
71
72	HashTableIteratorAdapter& operator++() { ++m_impl; return *this; }
73	// postfix ++ intentionally omitted
74
75	operator HashTableConstIteratorAdapter<HashTableType, ValueType>() {
76	typename HashTableType::const_iterator i = m_impl;
77	return i;
78	}
79
80	Keys keys() { return Keys(*this); }
81	Values values() { return Values(*this); }
82
83	typename HashTableType::iterator m_impl;
84	};
85
86	template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableConstKeysIterator {
87	private:
88	typedef HashTableConstIteratorAdapter<HashTableType, std::pair<KeyType, MappedType> > ConstIterator;
89
90	public:
91	HashTableConstKeysIterator(const ConstIterator& impl) : m_impl(impl) {}
92
93	const KeyType* get() const { return &(m_impl.get()->first); }
94	const KeyType& operator() const { return get(); }
95	const KeyType* operator->() const { return get(); }
96
97	HashTableConstKeysIterator& operator++() { ++m_impl; return *this; }
98	// postfix ++ intentionally omitted
99
100	ConstIterator m_impl;
101	};
102
103	template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableConstValuesIterator {
104	private:
105	typedef HashTableConstIteratorAdapter<HashTableType, std::pair<KeyType, MappedType> > ConstIterator;
106
107	public:
108	HashTableConstValuesIterator(const ConstIterator& impl) : m_impl(impl) {}
109
110	const MappedType* get() const { return &(m_impl.get()->second); }
111	const MappedType& operator() const { return get(); }
112	const MappedType* operator->() const { return get(); }
113
114	HashTableConstValuesIterator& operator++() { ++m_impl; return *this; }
115	// postfix ++ intentionally omitted
116
117	ConstIterator m_impl;
118	};
119
120	template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableKeysIterator {
121	private:
122	typedef HashTableIteratorAdapter<HashTableType, std::pair<KeyType, MappedType> > Iterator;
123	typedef HashTableConstIteratorAdapter<HashTableType, std::pair<KeyType, MappedType> > ConstIterator;
124
125	public:
126	HashTableKeysIterator(const Iterator& impl) : m_impl(impl) {}
127
128	KeyType* get() const { return &(m_impl.get()->first); }
129	KeyType& operator() const { return get(); }
130	KeyType* operator->() const { return get(); }
131
132	HashTableKeysIterator& operator++() { ++m_impl; return *this; }
133	// postfix ++ intentionally omitted
134
135	operator HashTableConstKeysIterator<HashTableType, KeyType, MappedType>() {
136	ConstIterator i = m_impl;
137	return i;
138	}
139
140	Iterator m_impl;
141	};
142
143	template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableValuesIterator {
144	private:
145	typedef HashTableIteratorAdapter<HashTableType, std::pair<KeyType, MappedType> > Iterator;
146	typedef HashTableConstIteratorAdapter<HashTableType, std::pair<KeyType, MappedType> > ConstIterator;
147
148	public:
149	HashTableValuesIterator(const Iterator& impl) : m_impl(impl) {}
150
151	MappedType* get() const { return &(m_impl.get()->second); }
152	MappedType& operator() const { return get(); }
153	MappedType* operator->() const { return get(); }
154
155	HashTableValuesIterator& operator++() { ++m_impl; return *this; }
156	// postfix ++ intentionally omitted
157
158	operator HashTableConstValuesIterator<HashTableType, KeyType, MappedType>() {
159	ConstIterator i = m_impl;
160	return i;
161	}
162
163	Iterator m_impl;
164	};
165
166	template<typename T, typename U, typename V>
167	inline bool operator==(const HashTableConstKeysIterator<T, U, V>& a, const HashTableConstKeysIterator<T, U, V>& b)
168	{
169	return a.m_impl == b.m_impl;
170	}
171
172	template<typename T, typename U, typename V>
173	inline bool operator!=(const HashTableConstKeysIterator<T, U, V>& a, const HashTableConstKeysIterator<T, U, V>& b)
174	{
175	return a.m_impl != b.m_impl;
176	}
177
178	template<typename T, typename U, typename V>
179	inline bool operator==(const HashTableConstValuesIterator<T, U, V>& a, const HashTableConstValuesIterator<T, U, V>& b)
180	{
181	return a.m_impl == b.m_impl;
182	}
183
184	template<typename T, typename U, typename V>
185	inline bool operator!=(const HashTableConstValuesIterator<T, U, V>& a, const HashTableConstValuesIterator<T, U, V>& b)
186	{
187	return a.m_impl != b.m_impl;
188	}
189
190	template<typename T, typename U, typename V>
191	inline bool operator==(const HashTableKeysIterator<T, U, V>& a, const HashTableKeysIterator<T, U, V>& b)
192	{
193	return a.m_impl == b.m_impl;
194	}
195
196	template<typename T, typename U, typename V>
197	inline bool operator!=(const HashTableKeysIterator<T, U, V>& a, const HashTableKeysIterator<T, U, V>& b)
198	{
199	return a.m_impl != b.m_impl;
200	}
201
202	template<typename T, typename U, typename V>
203	inline bool operator==(const HashTableValuesIterator<T, U, V>& a, const HashTableValuesIterator<T, U, V>& b)
204	{
205	return a.m_impl == b.m_impl;
206	}
207
208	template<typename T, typename U, typename V>
209	inline bool operator!=(const HashTableValuesIterator<T, U, V>& a, const HashTableValuesIterator<T, U, V>& b)
210	{
211	return a.m_impl != b.m_impl;
212	}
213
214
215	} // namespace WTF
216
217	#endif // WTF_HashIterators_h