Source/WTF/wtf/LoggingHashSet.h

/*
 * Copyright (C) 2017 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 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 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. 
 */

#pragma once

#include <wtf/DataLog.h>
#include <wtf/HashSet.h>
#include <wtf/LoggingHashID.h>
#include <wtf/LoggingHashTraits.h>

namespace WTF {

template<
    const char* typeArguments,
    typename ValueArg, typename HashArg = typename DefaultHash<ValueArg>::Hash,
    typename TraitsArg = HashTraits<ValueArg>,
    typename LoggingTraits = LoggingHashKeyTraits<ValueArg>>
class LoggingHashSet final {
    WTF_MAKE_FAST_ALLOCATED;

    typedef TraitsArg ValueTraits;
    typedef typename ValueTraits::TakeType TakeType;
    
public:
    typedef WTF::HashSet<ValueArg, HashArg, TraitsArg> HashSet;
    
    typedef typename HashSet::ValueType ValueType;
    typedef typename HashSet::iterator iterator;
    typedef typename HashSet::const_iterator const_iterator;
    typedef typename HashSet::AddResult AddResult;
    
    LoggingHashSet()
    {
        dataLog("auto* ", m_id, " = new HashSet<", typeArguments, ">();\n");
    }
    
    ~LoggingHashSet()
    {
        dataLog("delete ", m_id, ";\n");
    }
    
    LoggingHashSet(const LoggingHashSet& other)
        : m_set(other.m_set)
    {
        dataLog("auto* ", m_id, " = new HashSet<", typeArguments, ">(*", other.m_id, ");\n");
    }
    
    LoggingHashSet(LoggingHashSet&& other)
        : m_set(other.m_set)
    {
        dataLog("auto* ", m_id, " = new HashSet<", typeArguments, ">(WTFMove(*", other.m_id, "));\n");
    }
    
    LoggingHashSet& operator=(const LoggingHashSet& other)
    {
        dataLog("*", m_id, " = *", other.m_id, ";\n");
        m_set = other.m_set;
        return *this;
    }
    
    LoggingHashSet& operator=(LoggingHashSet&& other)
    {
        dataLog("*", m_id, " = WTFMove(*", other.m_id, ");\n");
        m_set = WTFMove(other.m_set);
        return *this;
    }
    
    void swap(LoggingHashSet& other)
    {
        dataLog(m_id, "->swap(*", other.m_id, ");\n");
        m_set.swap(other.m_set);
    }
    
    unsigned size() const { return m_set.size(); }
    unsigned capacity() const { return m_set.capacity(); }
    bool isEmpty() const { return m_set.isEmpty(); }
    
    iterator begin() const { return m_set.begin(); }
    iterator end() const { return m_set.end(); }
    
    iterator find(const ValueType& value) const
    {
        StringPrintStream string;
        string.print("{\n");
        string.print("    auto iter = ", m_id, "->find(");
        LoggingTraits::print(string, value);
        string.print(");\n");
        iterator result = m_set.find(value);
        if (result == m_set.end())
            string.print("    RELEASE_ASSERT(iter == ", m_id, "->end());\n");
        else
            string.print("    RELEASE_ASSERT(iter != ", m_id, "->end());\n");
        string.print("}\n");
        dataLog(string.toCString());
        return result;
    }
    
    bool contains(const ValueType& value) const
    {
        return find(value) != end();
    }
    
    // FIXME: Implement the translator versions of find() and friends.
    
    AddResult add(const ValueType& value)
    {
        StringPrintStream string;
        string.print(m_id, "->add(");
        LoggingTraits::print(string, value);
        string.print(");\n");
        dataLog(string.toCString());
        return m_set.add(value);
    }

    AddResult add(ValueType&& value)
    {
        StringPrintStream string;
        string.print(m_id, "->add(");
        LoggingTraits::print(string, value);
        string.print(");\n");
        dataLog(string.toCString());
        return m_set.add(WTFMove(value));
    }
    
    void addVoid(const ValueType& value)
    {
        StringPrintStream string;
        string.print(m_id, "->addVoid(");
        LoggingTraits::print(string, value);
        string.print(");\n");
        dataLog(string.toCString());
        m_set.addVoid(value);
    }

    void addVoid(ValueType&& value)
    {
        StringPrintStream string;
        string.print(m_id, "->addVoid(");
        LoggingTraits::print(string, value);
        string.print(");\n");
        dataLog(string.toCString());
        m_set.addVoid(WTFMove(value));
    }
    
    template<typename IteratorType>
    bool add(IteratorType begin, IteratorType end)
    {
        bool changed = false;
        for (IteratorType iter = begin; iter != end; ++iter)
            changed |= add(*iter).isNewEntry;
        return changed;
    }
    
    bool remove(iterator iter)
    {
        // FIXME: We should do much better than this!
        if (iter == end())
            return false;
        return remove(*iter);
    }
    
    bool remove(const ValueType& value)
    {
        StringPrintStream string;
        string.print(m_id, "->remove(");
        LoggingTraits::print(string, value);
        string.print(");\n");
        dataLog(string.toCString());
        return m_set.remove(value);
    }
    
    // FIXME: Implement removeIf
    
    void clear()
    {
        dataLog(m_id, "->clear();\n");
        m_set.clear();
    }
    
    TakeType take(const ValueType& value)
    {
        StringPrintStream string;
        string.print(m_id, "->remove(");
        LoggingTraits::print(string, value);
        string.print(");\n");
        dataLog(string.toCString());
        return m_set.take(value);
    }
    
    TakeType take(iterator iter)
    {
        return take(*iter);
    }
    
    TakeType takeAny()
    {
        dataLog(m_id, "->takeAny();\n");
        return m_set.takeAny();
    }
    
    template<typename OtherCollection>
    bool operator==(const OtherCollection& otherCollection) const
    {
        if (size() != otherCollection.size())
            return false;
        for (const auto& other : otherCollection) {
            if (!contains(other))
                return false;
        }
        return true;
    }
    
    template<typename OtherCollection>
    bool operator!=(const OtherCollection& other) const
    {
        return !(*this == other);
    }
    
private:
    HashSet m_set;
    LoggingHashID m_id;
};

} // namespace WTF

using WTF::LoggingHashSet;