/*

 * Copyright (C) 2003 Apple Computer, 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. 

 */

#include "config.h"

#include "DeprecatedValueListImpl.h"

#include "Shared.h"

#include <stdlib.h>

namespace WebCore {

class DeprecatedValueListImpl::Private : public Shared<DeprecatedValueListImpl::Private>

{

public:

    Private(void (*deleteFunc)(DeprecatedValueListImplNode *), DeprecatedValueListImplNode *(*copyFunc)(DeprecatedValueListImplNode *));

    Private(const Private &other);

    ~Private();

    void copyList(DeprecatedValueListImplNode *l, DeprecatedValueListImplNode *&head, DeprecatedValueListImplNode *&tail) const;

    void deleteList(DeprecatedValueListImplNode *l);

    DeprecatedValueListImplNode *head;

    DeprecatedValueListImplNode *tail;

    void (*deleteNode)(DeprecatedValueListImplNode *);

    DeprecatedValueListImplNode *(*copyNode)(DeprecatedValueListImplNode *);

    unsigned count;

};

inline DeprecatedValueListImpl::Private::Private(void (*deleteFunc)(DeprecatedValueListImplNode*),

        DeprecatedValueListImplNode* (*copyFunc)(DeprecatedValueListImplNode*)) : 

    head(NULL),

    tail(NULL),

    deleteNode(deleteFunc),

    copyNode(copyFunc),

    count(0)

{

}

inline DeprecatedValueListImpl::Private::Private(const Private &other) :

    Shared<DeprecatedValueListImpl::Private>(),

    deleteNode(other.deleteNode),

    copyNode(other.copyNode),

    count(other.count)

{

    other.copyList(other.head, head, tail);

}

inline DeprecatedValueListImpl::Private::~Private()

{

    deleteList(head);

}

void DeprecatedValueListImpl::Private::copyList(DeprecatedValueListImplNode *l, DeprecatedValueListImplNode *&head, DeprecatedValueListImplNode *&tail) const

{

    DeprecatedValueListImplNode *prev = NULL;

    DeprecatedValueListImplNode *node = l;

    head = NULL;

    while (node != NULL) {

        DeprecatedValueListImplNode *copy = copyNode(node);

        if (prev == NULL) {

            head = copy;

        } else {

            prev->next = copy;

        }

        copy->prev = prev;

        copy->next = NULL;

        prev = copy;

        node = node->next;

    }

    tail = prev;

}

void DeprecatedValueListImpl::Private::deleteList(DeprecatedValueListImplNode *l)

{

    DeprecatedValueListImplNode *p = l;

    while (p != NULL) {

        DeprecatedValueListImplNode *next = p->next;

        deleteNode(p);

        p = next;

    }

}

DeprecatedValueListImpl::DeprecatedValueListImpl(void (*deleteFunc)(DeprecatedValueListImplNode *), DeprecatedValueListImplNode *(*copyFunc)(DeprecatedValueListImplNode *)) :

    d(new Private(deleteFunc, copyFunc))

{

}

DeprecatedValueListImpl::DeprecatedValueListImpl(const DeprecatedValueListImpl &other) :

    d(other.d)

{

}

DeprecatedValueListImpl::~DeprecatedValueListImpl()

{

}

void DeprecatedValueListImpl::clear()

{

    if (d->head) {

        copyOnWrite();

        d->deleteList(d->head);

        d->head = NULL;

        d->tail = NULL;

        d->count = 0;

    }

}

unsigned DeprecatedValueListImpl::count() const

{

    return d->count;

}

bool DeprecatedValueListImpl::isEmpty() const

{

    return d->count == 0;

}

DeprecatedValueListImplIterator DeprecatedValueListImpl::appendNode(DeprecatedValueListImplNode *node)

{

    copyOnWrite();

    node->next = NULL;

    node->prev = d->tail;

    d->tail = node;

    if (d->head == NULL) {

        d->head = node;

    } else {

        node->prev->next = node;

    }

    d->count++;

    return node;

}

DeprecatedValueListImplIterator DeprecatedValueListImpl::prependNode(DeprecatedValueListImplNode *node)

{

    copyOnWrite();

    node->next = d->head;

    node->prev = NULL;

    d->head = node;

    if (d->tail == NULL) {

        d->tail = node;

    } else {

        node->next->prev = node;

    }

    d->count++;

    return node;

}

void DeprecatedValueListImpl::removeEqualNodes(DeprecatedValueListImplNode *node, bool (*equalFunc)(const DeprecatedValueListImplNode *, const DeprecatedValueListImplNode *))

{

    copyOnWrite();

    DeprecatedValueListImplNode *next;

    for (DeprecatedValueListImplNode *p = d->head; p != NULL; p = next) {

        next = p->next;

        if (equalFunc(node, p)) {

            if (p->next != NULL) {

                p->next->prev = p->prev;

            } else {

                d->tail = p->prev;

            }

            if (p->prev != NULL) {

                p->prev->next = p->next;

            } else {

                d->head = p->next;

            }

            d->deleteNode(p);

            d->count--;

        }

    }

}

unsigned DeprecatedValueListImpl::containsEqualNodes(DeprecatedValueListImplNode *node, bool (*equalFunc)(const DeprecatedValueListImplNode *, const DeprecatedValueListImplNode *)) const

{

    unsigned contains = 0;

    for (DeprecatedValueListImplNode *p = d->head; p != NULL; p = p->next) {

        if (equalFunc(node, p)) {

            ++contains;

        }

    }

    return contains;

}

DeprecatedValueListImplIterator DeprecatedValueListImpl::findEqualNode(DeprecatedValueListImplNode *node, bool (*equalFunc)(const DeprecatedValueListImplNode *, const DeprecatedValueListImplNode *)) const

{

    DeprecatedValueListImplIterator it = begin();

    DeprecatedValueListImplIterator endIt = end();

    while (it != endIt) {

        if (equalFunc(node, it.node())) {

            break;

        }

        it++;

    }

    return it;

}

DeprecatedValueListImplIterator DeprecatedValueListImpl::insert(const DeprecatedValueListImplIterator &iterator, DeprecatedValueListImplNode *node)

{

    copyOnWrite();

    DeprecatedValueListImplNode *next = iterator.nodeImpl;

    if (next == NULL)

        return appendNode(node);

    if (next == d->head)

        return prependNode(node);

    DeprecatedValueListImplNode *prev = next->prev;

    node->next = next;

    node->prev = prev;

    next->prev = node;

    prev->next = node;

    d->count++;

    return node;

}

DeprecatedValueListImplIterator DeprecatedValueListImpl::removeIterator(DeprecatedValueListImplIterator &iterator)

{

    copyOnWrite();

    if (iterator.nodeImpl == NULL) {

        return iterator;

    }

    DeprecatedValueListImplNode *next = iterator.nodeImpl->next;

    // detach node

    if (iterator.nodeImpl->next != NULL) {

        iterator.nodeImpl->next->prev = iterator.nodeImpl->prev;

    } else {

        d->tail = iterator.nodeImpl->prev;

    }

    if (iterator.nodeImpl->prev != NULL) {

        iterator.nodeImpl->prev->next = iterator.nodeImpl->next;

    } else {

        d->head = iterator.nodeImpl->next;

    }

    d->deleteNode(iterator.nodeImpl);

    d->count--;

    return DeprecatedValueListImplIterator(next);

}

DeprecatedValueListImplIterator DeprecatedValueListImpl::fromLast()

{

    copyOnWrite();

    return DeprecatedValueListImplIterator(lastNode());

}

DeprecatedValueListImplNode *DeprecatedValueListImpl::firstNode()

{

    copyOnWrite();

    return ((const DeprecatedValueListImpl *)this)->firstNode();

}

DeprecatedValueListImplNode *DeprecatedValueListImpl::lastNode()

{

    copyOnWrite();

    return ((const DeprecatedValueListImpl *)this)->lastNode();

}

DeprecatedValueListImplNode *DeprecatedValueListImpl::firstNode() const

{

    return d->head;

}

DeprecatedValueListImplNode *DeprecatedValueListImpl::lastNode() const

{

    return d->tail;

}

DeprecatedValueListImplIterator DeprecatedValueListImpl::begin()

{

    copyOnWrite();

    return ((const DeprecatedValueListImpl *)this)->begin();

}

DeprecatedValueListImplIterator DeprecatedValueListImpl::end()

{

    copyOnWrite();

    return ((const DeprecatedValueListImpl *)this)->end();

}

DeprecatedValueListImplIterator DeprecatedValueListImpl::begin() const

{

    return DeprecatedValueListImplIterator(firstNode());

}

DeprecatedValueListImplIterator DeprecatedValueListImpl::end() const

{

    return DeprecatedValueListImplIterator(NULL);

}

DeprecatedValueListImplIterator DeprecatedValueListImpl::fromLast() const

{

    return DeprecatedValueListImplIterator(lastNode());

}

DeprecatedValueListImplNode *DeprecatedValueListImpl::nodeAt(unsigned index)

{

    copyOnWrite();

    if (d->count <= index) {

        return NULL;

    }

    DeprecatedValueListImplNode *p = d->head;

    for (unsigned i = 0; i < index; i++) {

        p = p->next;

    }

    return p;

}

DeprecatedValueListImplNode *DeprecatedValueListImpl::nodeAt(unsigned index) const

{

    if (d->count <= index) {

        return NULL;

    }

    DeprecatedValueListImplNode *p = d->head;

    for (unsigned i = 0; i < index; i++) {

        p = p->next;

    }

    return p;

}

DeprecatedValueListImpl& DeprecatedValueListImpl::operator=(const DeprecatedValueListImpl &other)

{

    DeprecatedValueListImpl tmp(other);

    RefPtr<Private> tmpD = tmp.d;

    tmp.d = d;

    d = tmpD;

    return *this;

}

void DeprecatedValueListImpl::copyOnWrite()

{

    if (!d->hasOneRef())

        d = new Private(*d);

}

bool DeprecatedValueListImpl::isEqual(const DeprecatedValueListImpl &other, bool (*equalFunc)(const DeprecatedValueListImplNode *, const DeprecatedValueListImplNode *)) const

{

    DeprecatedValueListImplNode *p, *q;

    for (p = d->head, q = other.d->head; p && q; p = p->next, q = q->next) {

        if (!equalFunc(p, q)) {

            return false;

        }

    }

    return !p && !q;

}

}