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

/*
 * 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() {}
        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() {}
        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	/*
	2	* Copyright (C) 2007 Apple Inc. All rights reserved.
	3	*
	4	* Redistribution and use in source and binary forms, with or without
	5	* modification, are permitted provided that the following conditions
	6	* are met:
	7	* 1. Redistributions of source code must retain the above copyright
	8	* notice, this list of conditions and the following disclaimer.
	9	* 2. Redistributions in binary form must reproduce the above copyright
	10	* notice, this list of conditions and the following disclaimer in the
	11	* documentation and/or other materials provided with the distribution.
	12	*
	13	* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
	14	* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	15	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	16	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
	17	* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
	18	* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
	19	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
	20	* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
	21	* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	22	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	23	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	24	*/
	25
	26	#ifndef WTF_HashIterators_h
	27	#define WTF_HashIterators_h
	28
	29	namespace WTF {
	30
	31	template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableConstKeysIterator;
	32	template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableConstValuesIterator;
	33	template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableKeysIterator;
	34	template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableValuesIterator;
	35
	36	template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableConstIteratorAdapter<HashTableType, std::pair<KeyType, MappedType> > {
	37	private:
	38	typedef std::pair<KeyType, MappedType> ValueType;
	39	public:
	40	typedef HashTableConstKeysIterator<HashTableType, KeyType, MappedType> Keys;
	41	typedef HashTableConstValuesIterator<HashTableType, KeyType, MappedType> Values;
	42
14957cd0	43	HashTableConstIteratorAdapter() {}
b37bf2e1 A	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
14957cd0	66	HashTableIteratorAdapter() {}
b37bf2e1 A	67	HashTableIteratorAdapter(const typename HashTableType::iterator& impl) : m_impl(impl) {}
	68
	69	ValueType* get() const { return (ValueType*)m_impl.get(); }
	70	ValueType& operator() const { return get(); }
	71	ValueType* operator->() const { return get(); }
	72
	73	HashTableIteratorAdapter& operator++() { ++m_impl; return *this; }
	74	// postfix ++ intentionally omitted
	75
	76	operator HashTableConstIteratorAdapter<HashTableType, ValueType>() {
	77	typename HashTableType::const_iterator i = m_impl;
	78	return i;
	79	}
	80
	81	Keys keys() { return Keys(*this); }
	82	Values values() { return Values(*this); }
	83
	84	typename HashTableType::iterator m_impl;
	85	};
	86
	87	template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableConstKeysIterator {
	88	private:
	89	typedef HashTableConstIteratorAdapter<HashTableType, std::pair<KeyType, MappedType> > ConstIterator;
	90
	91	public:
	92	HashTableConstKeysIterator(const ConstIterator& impl) : m_impl(impl) {}
	93
	94	const KeyType* get() const { return &(m_impl.get()->first); }
	95	const KeyType& operator() const { return get(); }
	96	const KeyType* operator->() const { return get(); }
	97
	98	HashTableConstKeysIterator& operator++() { ++m_impl; return *this; }
	99	// postfix ++ intentionally omitted
	100
	101	ConstIterator m_impl;
	102	};
	103
	104	template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableConstValuesIterator {
	105	private:
	106	typedef HashTableConstIteratorAdapter<HashTableType, std::pair<KeyType, MappedType> > ConstIterator;
	107
	108	public:
	109	HashTableConstValuesIterator(const ConstIterator& impl) : m_impl(impl) {}
	110
	111	const MappedType* get() const { return &(m_impl.get()->second); }
	112	const MappedType& operator() const { return get(); }
	113	const MappedType* operator->() const { return get(); }
	114
	115	HashTableConstValuesIterator& operator++() { ++m_impl; return *this; }
	116	// postfix ++ intentionally omitted
	117
	118	ConstIterator m_impl;
	119	};
	120
	121	template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableKeysIterator {
	122	private:
	123	typedef HashTableIteratorAdapter<HashTableType, std::pair<KeyType, MappedType> > Iterator;
	124	typedef HashTableConstIteratorAdapter<HashTableType, std::pair<KeyType, MappedType> > ConstIterator;
	125
	126	public:
	127	HashTableKeysIterator(const Iterator& impl) : m_impl(impl) {}
	128
	129	KeyType* get() const { return &(m_impl.get()->first); }
	130	KeyType& operator() const { return get(); }
131	KeyType* operator->() const { return get(); }
132
133	HashTableKeysIterator& operator++() { ++m_impl; return *this; }
134	// postfix ++ intentionally omitted
135
136	operator HashTableConstKeysIterator<HashTableType, KeyType, MappedType>() {
137	ConstIterator i = m_impl;
138	return i;
139	}
140
141	Iterator m_impl;
142	};
143
144	template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableValuesIterator {
145	private:
146	typedef HashTableIteratorAdapter<HashTableType, std::pair<KeyType, MappedType> > Iterator;
147	typedef HashTableConstIteratorAdapter<HashTableType, std::pair<KeyType, MappedType> > ConstIterator;
148
149	public:
150	HashTableValuesIterator(const Iterator& impl) : m_impl(impl) {}
151
152	MappedType* get() const { return &(m_impl.get()->second); }
153	MappedType& operator() const { return get(); }
154	MappedType* operator->() const { return get(); }
155
156	HashTableValuesIterator& operator++() { ++m_impl; return *this; }
157	// postfix ++ intentionally omitted
158
159	operator HashTableConstValuesIterator<HashTableType, KeyType, MappedType>() {
160	ConstIterator i = m_impl;
161	return i;
162	}
163
164	Iterator m_impl;
165	};
166
167	template<typename T, typename U, typename V>
168	inline bool operator==(const HashTableConstKeysIterator<T, U, V>& a, const HashTableConstKeysIterator<T, U, V>& b)
169	{
170	return a.m_impl == b.m_impl;
171	}
172
173	template<typename T, typename U, typename V>
174	inline bool operator!=(const HashTableConstKeysIterator<T, U, V>& a, const HashTableConstKeysIterator<T, U, V>& b)
175	{
176	return a.m_impl != b.m_impl;
177	}
178
179	template<typename T, typename U, typename V>
180	inline bool operator==(const HashTableConstValuesIterator<T, U, V>& a, const HashTableConstValuesIterator<T, U, V>& b)
181	{
182	return a.m_impl == b.m_impl;
183	}
184
185	template<typename T, typename U, typename V>
186	inline bool operator!=(const HashTableConstValuesIterator<T, U, V>& a, const HashTableConstValuesIterator<T, U, V>& b)
187	{
188	return a.m_impl != b.m_impl;
189	}
190
191	template<typename T, typename U, typename V>
192	inline bool operator==(const HashTableKeysIterator<T, U, V>& a, const HashTableKeysIterator<T, U, V>& b)
193	{
194	return a.m_impl == b.m_impl;
195	}
196
197	template<typename T, typename U, typename V>
198	inline bool operator!=(const HashTableKeysIterator<T, U, V>& a, const HashTableKeysIterator<T, U, V>& b)
199	{
200	return a.m_impl != b.m_impl;
201	}
202
203	template<typename T, typename U, typename V>
204	inline bool operator==(const HashTableValuesIterator<T, U, V>& a, const HashTableValuesIterator<T, U, V>& b)
205	{
206	return a.m_impl == b.m_impl;
207	}
208
209	template<typename T, typename U, typename V>
210	inline bool operator!=(const HashTableValuesIterator<T, U, V>& a, const HashTableValuesIterator<T, U, V>& b)
211	{
212	return a.m_impl != b.m_impl;
213	}
214
215
216	} // namespace WTF
217
218	#endif // WTF_HashIterators_h