[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(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	/*
	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
	43	HashTableConstIteratorAdapter(const typename HashTableType::const_iterator& impl) : m_impl(impl) {}
	44
	45	const ValueType* get() const { return (const ValueType*)m_impl.get(); }
	46	const ValueType& operator() const { return get(); }
	47	const ValueType* operator->() const { return get(); }
	48
	49	HashTableConstIteratorAdapter& operator++() { ++m_impl; return *this; }
	50	// postfix ++ intentionally omitted
	51
	52	Keys keys() { return Keys(*this); }
	53	Values values() { return Values(*this); }
	54
	55	typename HashTableType::const_iterator m_impl;
	56	};
	57
	58	template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableIteratorAdapter<HashTableType, std::pair<KeyType, MappedType> > {
	59	private:
	60	typedef std::pair<KeyType, MappedType> ValueType;
	61	public:
	62	typedef HashTableKeysIterator<HashTableType, KeyType, MappedType> Keys;
	63	typedef HashTableValuesIterator<HashTableType, KeyType, MappedType> Values;
	64
65	HashTableIteratorAdapter(const typename HashTableType::iterator& impl) : m_impl(impl) {}
66
67	ValueType* get() const { return (ValueType*)m_impl.get(); }
68	ValueType& operator() const { return get(); }
69	ValueType* operator->() const { return get(); }
70
71	HashTableIteratorAdapter& operator++() { ++m_impl; return *this; }
72	// postfix ++ intentionally omitted
73
74	operator HashTableConstIteratorAdapter<HashTableType, ValueType>() {
75	typename HashTableType::const_iterator i = m_impl;
76	return i;
77	}
78
79	Keys keys() { return Keys(*this); }
80	Values values() { return Values(*this); }
81
82	typename HashTableType::iterator m_impl;
83	};
84
85	template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableConstKeysIterator {
86	private:
87	typedef HashTableConstIteratorAdapter<HashTableType, std::pair<KeyType, MappedType> > ConstIterator;
88
89	public:
90	HashTableConstKeysIterator(const ConstIterator& impl) : m_impl(impl) {}
91
92	const KeyType* get() const { return &(m_impl.get()->first); }
93	const KeyType& operator() const { return get(); }
94	const KeyType* operator->() const { return get(); }
95
96	HashTableConstKeysIterator& operator++() { ++m_impl; return *this; }
97	// postfix ++ intentionally omitted
98
99	ConstIterator m_impl;
100	};
101
102	template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableConstValuesIterator {
103	private:
104	typedef HashTableConstIteratorAdapter<HashTableType, std::pair<KeyType, MappedType> > ConstIterator;
105
106	public:
107	HashTableConstValuesIterator(const ConstIterator& impl) : m_impl(impl) {}
108
109	const MappedType* get() const { return &(m_impl.get()->second); }
110	const MappedType& operator() const { return get(); }
111	const MappedType* operator->() const { return get(); }
112
113	HashTableConstValuesIterator& operator++() { ++m_impl; return *this; }
114	// postfix ++ intentionally omitted
115
116	ConstIterator m_impl;
117	};
118
119	template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableKeysIterator {
120	private:
121	typedef HashTableIteratorAdapter<HashTableType, std::pair<KeyType, MappedType> > Iterator;
122	typedef HashTableConstIteratorAdapter<HashTableType, std::pair<KeyType, MappedType> > ConstIterator;
123
124	public:
125	HashTableKeysIterator(const Iterator& impl) : m_impl(impl) {}
126
127	KeyType* get() const { return &(m_impl.get()->first); }
128	KeyType& operator() const { return get(); }
129	KeyType* operator->() const { return get(); }
130
131	HashTableKeysIterator& operator++() { ++m_impl; return *this; }
132	// postfix ++ intentionally omitted
133
134	operator HashTableConstKeysIterator<HashTableType, KeyType, MappedType>() {
135	ConstIterator i = m_impl;
136	return i;
137	}
138
139	Iterator m_impl;
140	};
141
142	template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableValuesIterator {
143	private:
144	typedef HashTableIteratorAdapter<HashTableType, std::pair<KeyType, MappedType> > Iterator;
145	typedef HashTableConstIteratorAdapter<HashTableType, std::pair<KeyType, MappedType> > ConstIterator;
146
147	public:
148	HashTableValuesIterator(const Iterator& impl) : m_impl(impl) {}
149
150	MappedType* get() const { return &(m_impl.get()->second); }
151	MappedType& operator() const { return get(); }
152	MappedType* operator->() const { return get(); }
153
154	HashTableValuesIterator& operator++() { ++m_impl; return *this; }
155	// postfix ++ intentionally omitted
156
157	operator HashTableConstValuesIterator<HashTableType, KeyType, MappedType>() {
158	ConstIterator i = m_impl;
159	return i;
160	}
161
162	Iterator m_impl;
163	};
164
165	template<typename T, typename U, typename V>
166	inline bool operator==(const HashTableConstKeysIterator<T, U, V>& a, const HashTableConstKeysIterator<T, U, V>& b)
167	{
168	return a.m_impl == b.m_impl;
169	}
170
171	template<typename T, typename U, typename V>
172	inline bool operator!=(const HashTableConstKeysIterator<T, U, V>& a, const HashTableConstKeysIterator<T, U, V>& b)
173	{
174	return a.m_impl != b.m_impl;
175	}
176
177	template<typename T, typename U, typename V>
178	inline bool operator==(const HashTableConstValuesIterator<T, U, V>& a, const HashTableConstValuesIterator<T, U, V>& b)
179	{
180	return a.m_impl == b.m_impl;
181	}
182
183	template<typename T, typename U, typename V>
184	inline bool operator!=(const HashTableConstValuesIterator<T, U, V>& a, const HashTableConstValuesIterator<T, U, V>& b)
185	{
186	return a.m_impl != b.m_impl;
187	}
188
189	template<typename T, typename U, typename V>
190	inline bool operator==(const HashTableKeysIterator<T, U, V>& a, const HashTableKeysIterator<T, U, V>& b)
191	{
192	return a.m_impl == b.m_impl;
193	}
194
195	template<typename T, typename U, typename V>
196	inline bool operator!=(const HashTableKeysIterator<T, U, V>& a, const HashTableKeysIterator<T, U, V>& b)
197	{
198	return a.m_impl != b.m_impl;
199	}
200
201	template<typename T, typename U, typename V>
202	inline bool operator==(const HashTableValuesIterator<T, U, V>& a, const HashTableValuesIterator<T, U, V>& b)
203	{
204	return a.m_impl == b.m_impl;
205	}
206
207	template<typename T, typename U, typename V>
208	inline bool operator!=(const HashTableValuesIterator<T, U, V>& a, const HashTableValuesIterator<T, U, V>& b)
209	{
210	return a.m_impl != b.m_impl;
211	}
212
213
214	} // namespace WTF
215
216	#endif // WTF_HashIterators_h