qhash.h
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上传日期:2022-06-22
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- /****************************************************************************
- **
- ** Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
- ** Contact: Qt Software Information (qt-info@nokia.com)
- **
- ** This file is part of the QtCore module of the Qt Toolkit.
- **
- ** Commercial Usage
- ** Licensees holding valid Qt Commercial licenses may use this file in
- ** accordance with the Qt Commercial License Agreement provided with the
- ** Software or, alternatively, in accordance with the terms contained in
- ** a written agreement between you and Nokia.
- **
- **
- ** GNU General Public License Usage
- ** Alternatively, this file may be used under the terms of the GNU
- ** General Public License versions 2.0 or 3.0 as published by the Free
- ** Software Foundation and appearing in the file LICENSE.GPL included in
- ** the packaging of this file. Please review the following information
- ** to ensure GNU General Public Licensing requirements will be met:
- ** http://www.fsf.org/licensing/licenses/info/GPLv2.html and
- ** http://www.gnu.org/copyleft/gpl.html. In addition, as a special
- ** exception, Nokia gives you certain additional rights. These rights
- ** are described in the Nokia Qt GPL Exception version 1.3, included in
- ** the file GPL_EXCEPTION.txt in this package.
- **
- ** Qt for Windows(R) Licensees
- ** As a special exception, Nokia, as the sole copyright holder for Qt
- ** Designer, grants users of the Qt/Eclipse Integration plug-in the
- ** right for the Qt/Eclipse Integration to link to functionality
- ** provided by Qt Designer and its related libraries.
- **
- ** If you are unsure which license is appropriate for your use, please
- ** contact the sales department at qt-sales@nokia.com.
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- ****************************************************************************/
- #ifndef QHASH_H
- #define QHASH_H
- #include <QtCore/qatomic.h>
- #include <QtCore/qchar.h>
- #include <QtCore/qiterator.h>
- #include <QtCore/qlist.h>
- #include <QtCore/qpair.h>
- QT_BEGIN_HEADER
- QT_BEGIN_NAMESPACE
- #undef QT_QHASH_DEBUG
- QT_MODULE(Core)
- class QBitArray;
- class QByteArray;
- class QString;
- class QStringRef;
- inline uint qHash(char key) { return uint(key); }
- inline uint qHash(uchar key) { return uint(key); }
- inline uint qHash(signed char key) { return uint(key); }
- inline uint qHash(ushort key) { return uint(key); }
- inline uint qHash(short key) { return uint(key); }
- inline uint qHash(uint key) { return key; }
- inline uint qHash(int key) { return uint(key); }
- inline uint qHash(ulong key)
- {
- if (sizeof(ulong) > sizeof(uint)) {
- return uint((key >> (8 * sizeof(uint) - 1)) ^ key);
- } else {
- return uint(key);
- }
- }
- inline uint qHash(long key) { return qHash(ulong(key)); }
- inline uint qHash(quint64 key)
- {
- if (sizeof(quint64) > sizeof(uint)) {
- return uint((key >> (8 * sizeof(uint) - 1)) ^ key);
- } else {
- return uint(key);
- }
- }
- inline uint qHash(qint64 key) { return qHash(quint64(key)); }
- inline uint qHash(QChar key) { return qHash(key.unicode()); }
- Q_CORE_EXPORT uint qHash(const QByteArray &key);
- Q_CORE_EXPORT uint qHash(const QString &key);
- Q_CORE_EXPORT uint qHash(const QStringRef &key);
- Q_CORE_EXPORT uint qHash(const QBitArray &key);
- #if defined(Q_CC_MSVC)
- #pragma warning( push )
- #pragma warning( disable : 4311 ) // disable pointer truncation warning
- #endif
- template <class T> inline uint qHash(const T *key)
- {
- if (sizeof(const T *) > sizeof(uint))
- return qHash(reinterpret_cast<quint64>(key));
- else
- return uint(reinterpret_cast<ulong>(key));
- }
- #if defined(Q_CC_MSVC)
- #pragma warning( pop )
- #endif
- template <typename T1, typename T2> inline uint qHash(const QPair<T1, T2> &key)
- {
- uint h1 = qHash(key.first);
- uint h2 = qHash(key.second);
- return ((h1 << 16) | (h1 >> 16)) ^ h2;
- }
- struct Q_CORE_EXPORT QHashData
- {
- struct Node {
- Node *next;
- uint h;
- };
- Node *fakeNext;
- Node **buckets;
- QBasicAtomicInt ref;
- int size;
- int nodeSize;
- short userNumBits;
- short numBits;
- int numBuckets;
- uint sharable : 1;
- void *allocateNode();
- void freeNode(void *node);
- QHashData *detach_helper(void (*node_duplicate)(Node *, void *), int nodeSize);
- void mightGrow();
- bool willGrow();
- void hasShrunk();
- void rehash(int hint);
- void destroyAndFree();
- Node *firstNode();
- #ifdef QT_QHASH_DEBUG
- void dump();
- void checkSanity();
- #endif
- static Node *nextNode(Node *node);
- static Node *previousNode(Node *node);
- static QHashData shared_null;
- };
- inline void QHashData::mightGrow() // ### Qt 5: eliminate
- {
- if (size >= numBuckets)
- rehash(numBits + 1);
- }
- inline bool QHashData::willGrow()
- {
- if (size >= numBuckets) {
- rehash(numBits + 1);
- return true;
- } else {
- return false;
- }
- }
- inline void QHashData::hasShrunk()
- {
- if (size <= (numBuckets >> 3) && numBits > userNumBits)
- rehash(qMax(int(numBits) - 2, int(userNumBits)));
- }
- inline QHashData::Node *QHashData::firstNode()
- {
- Node *e = reinterpret_cast<Node *>(this);
- Node **bucket = buckets;
- int n = numBuckets;
- while (n--) {
- if (*bucket != e)
- return *bucket;
- ++bucket;
- }
- return e;
- }
- struct QHashDummyValue
- {
- };
- inline bool operator==(const QHashDummyValue & /* v1 */, const QHashDummyValue & /* v2 */)
- {
- return true;
- }
- Q_DECLARE_TYPEINFO(QHashDummyValue, Q_MOVABLE_TYPE | Q_DUMMY_TYPE);
- template <class Key, class T>
- struct QHashDummyNode
- {
- QHashDummyNode *next;
- uint h;
- Key key;
- inline QHashDummyNode(const Key &key0) : key(key0) {}
- };
- template <class Key, class T>
- struct QHashNode
- {
- QHashNode *next;
- uint h;
- Key key;
- T value;
- inline QHashNode(const Key &key0) : key(key0) {} // ### remove in 5.0
- inline QHashNode(const Key &key0, const T &value0) : key(key0), value(value0) {}
- inline bool same_key(uint h0, const Key &key0) { return h0 == h && key0 == key; }
- };
- #ifndef QT_NO_PARTIAL_TEMPLATE_SPECIALIZATION
- #define Q_HASH_DECLARE_INT_NODES(key_type)
- template <class T>
- struct QHashDummyNode<key_type, T> {
- QHashDummyNode *next;
- union { uint h; key_type key; };
- inline QHashDummyNode(key_type /* key0 */) {}
- };
- template <class T>
- struct QHashNode<key_type, T> {
- QHashNode *next;
- union { uint h; key_type key; };
- T value;
- inline QHashNode(key_type /* key0 */) {}
- inline QHashNode(key_type /* key0 */, const T &value0) : value(value0) {}
- inline bool same_key(uint h0, key_type) { return h0 == h; }
- }
- #if defined(Q_BYTE_ORDER) && Q_BYTE_ORDER == Q_LITTLE_ENDIAN
- Q_HASH_DECLARE_INT_NODES(short);
- Q_HASH_DECLARE_INT_NODES(ushort);
- #endif
- Q_HASH_DECLARE_INT_NODES(int);
- Q_HASH_DECLARE_INT_NODES(uint);
- #undef Q_HASH_DECLARE_INT_NODES
- #endif // QT_NO_PARTIAL_TEMPLATE_SPECIALIZATION
- template <class Key, class T>
- class QHash
- {
- typedef QHashDummyNode<Key, T> DummyNode;
- typedef QHashNode<Key, T> Node;
- union {
- QHashData *d;
- QHashNode<Key, T> *e;
- };
- static inline Node *concrete(QHashData::Node *node) {
- return reinterpret_cast<Node *>(node);
- }
- public:
- inline QHash() : d(&QHashData::shared_null) { d->ref.ref(); }
- inline QHash(const QHash<Key, T> &other) : d(other.d) { d->ref.ref(); if (!d->sharable) detach(); }
- inline ~QHash() { if (!d->ref.deref()) freeData(d); }
- QHash<Key, T> &operator=(const QHash<Key, T> &other);
- bool operator==(const QHash<Key, T> &other) const;
- inline bool operator!=(const QHash<Key, T> &other) const { return !(*this == other); }
- inline int size() const { return d->size; }
- inline bool isEmpty() const { return d->size == 0; }
- inline int capacity() const { return d->numBuckets; }
- void reserve(int size);
- inline void squeeze() { reserve(1); }
- inline void detach() { if (d->ref != 1) detach_helper(); }
- inline bool isDetached() const { return d->ref == 1; }
- inline void setSharable(bool sharable) { if (!sharable) detach(); d->sharable = sharable; }
- void clear();
- int remove(const Key &key);
- T take(const Key &key);
- bool contains(const Key &key) const;
- const Key key(const T &value) const;
- const Key key(const T &value, const Key &defaultKey) const;
- const T value(const Key &key) const;
- const T value(const Key &key, const T &defaultValue) const;
- T &operator[](const Key &key);
- const T operator[](const Key &key) const;
- QList<Key> uniqueKeys() const;
- QList<Key> keys() const;
- QList<Key> keys(const T &value) const;
- QList<T> values() const;
- QList<T> values(const Key &key) const;
- int count(const Key &key) const;
- class const_iterator;
- class iterator
- {
- friend class const_iterator;
- QHashData::Node *i;
- public:
- typedef std::bidirectional_iterator_tag iterator_category;
- typedef ptrdiff_t difference_type;
- typedef T value_type;
- typedef T *pointer;
- typedef T &reference;
- // ### Qt 5: get rid of 'operator Node *'
- inline operator Node *() const { return concrete(i); }
- inline iterator() : i(0) { }
- explicit inline iterator(void *node) : i(reinterpret_cast<QHashData::Node *>(node)) { }
- inline const Key &key() const { return concrete(i)->key; }
- inline T &value() const { return concrete(i)->value; }
- inline T &operator*() const { return concrete(i)->value; }
- inline T *operator->() const { return &concrete(i)->value; }
- inline bool operator==(const iterator &o) const { return i == o.i; }
- inline bool operator!=(const iterator &o) const { return i != o.i; }
- inline iterator &operator++() {
- i = QHashData::nextNode(i);
- return *this;
- }
- inline iterator operator++(int) {
- iterator r = *this;
- i = QHashData::nextNode(i);
- return r;
- }
- inline iterator &operator--() {
- i = QHashData::previousNode(i);
- return *this;
- }
- inline iterator operator--(int) {
- iterator r = *this;
- i = QHashData::previousNode(i);
- return r;
- }
- inline iterator operator+(int j) const
- { iterator r = *this; if (j > 0) while (j--) ++r; else while (j++) --r; return r; }
- inline iterator operator-(int j) const { return operator+(-j); }
- inline iterator &operator+=(int j) { return *this = *this + j; }
- inline iterator &operator-=(int j) { return *this = *this - j; }
- // ### Qt 5: not sure this is necessary anymore
- #ifdef QT_STRICT_ITERATORS
- private:
- #else
- public:
- #endif
- inline bool operator==(const const_iterator &o) const
- { return i == o.i; }
- inline bool operator!=(const const_iterator &o) const
- { return i != o.i; }
- private:
- // ### Qt 5: remove
- inline operator bool() const { return false; }
- };
- friend class iterator;
- class const_iterator
- {
- friend class iterator;
- QHashData::Node *i;
- public:
- typedef std::bidirectional_iterator_tag iterator_category;
- typedef ptrdiff_t difference_type;
- typedef T value_type;
- typedef const T *pointer;
- typedef const T &reference;
- // ### Qt 5: get rid of 'operator Node *'
- inline operator Node *() const { return concrete(i); }
- inline const_iterator() : i(0) { }
- explicit inline const_iterator(void *node)
- : i(reinterpret_cast<QHashData::Node *>(node)) { }
- #ifdef QT_STRICT_ITERATORS
- explicit inline const_iterator(const iterator &o)
- #else
- inline const_iterator(const iterator &o)
- #endif
- { i = o.i; }
- inline const Key &key() const { return concrete(i)->key; }
- inline const T &value() const { return concrete(i)->value; }
- inline const T &operator*() const { return concrete(i)->value; }
- inline const T *operator->() const { return &concrete(i)->value; }
- inline bool operator==(const const_iterator &o) const { return i == o.i; }
- inline bool operator!=(const const_iterator &o) const { return i != o.i; }
- inline const_iterator &operator++() {
- i = QHashData::nextNode(i);
- return *this;
- }
- inline const_iterator operator++(int) {
- const_iterator r = *this;
- i = QHashData::nextNode(i);
- return r;
- }
- inline const_iterator &operator--() {
- i = QHashData::previousNode(i);
- return *this;
- }
- inline const_iterator operator--(int) {
- const_iterator r = *this;
- i = QHashData::previousNode(i);
- return r;
- }
- inline const_iterator operator+(int j) const
- { const_iterator r = *this; if (j > 0) while (j--) ++r; else while (j++) --r; return r; }
- inline const_iterator operator-(int j) const { return operator+(-j); }
- inline const_iterator &operator+=(int j) { return *this = *this + j; }
- inline const_iterator &operator-=(int j) { return *this = *this - j; }
- // ### Qt 5: not sure this is necessary anymore
- #ifdef QT_STRICT_ITERATORS
- private:
- inline bool operator==(const iterator &o) const { return operator==(const_iterator(o)); }
- inline bool operator!=(const iterator &o) const { return operator!=(const_iterator(o)); }
- #endif
- private:
- // ### Qt 5: remove
- inline operator bool() const { return false; }
- };
- friend class const_iterator;
- // STL style
- inline iterator begin() { detach(); return iterator(d->firstNode()); }
- inline const_iterator begin() const { return const_iterator(d->firstNode()); }
- inline const_iterator constBegin() const { return const_iterator(d->firstNode()); }
- inline iterator end() { detach(); return iterator(e); }
- inline const_iterator end() const { return const_iterator(e); }
- inline const_iterator constEnd() const { return const_iterator(e); }
- iterator erase(iterator it);
- // more Qt
- typedef iterator Iterator;
- typedef const_iterator ConstIterator;
- inline int count() const { return d->size; }
- iterator find(const Key &key);
- const_iterator find(const Key &key) const;
- const_iterator constFind(const Key &key) const;
- iterator insert(const Key &key, const T &value);
- iterator insertMulti(const Key &key, const T &value);
- QHash<Key, T> &unite(const QHash<Key, T> &other);
- // STL compatibility
- typedef T mapped_type;
- typedef Key key_type;
- typedef ptrdiff_t difference_type;
- typedef int size_type;
- inline bool empty() const { return isEmpty(); }
- #ifdef QT_QHASH_DEBUG
- inline void dump() const { d->dump(); }
- inline void checkSanity() const { d->checkSanity(); }
- #endif
- private:
- void detach_helper();
- void freeData(QHashData *d);
- Node **findNode(const Key &key, uint *hp = 0) const;
- Node *createNode(uint h, const Key &key, const T &value, Node **nextNode);
- void deleteNode(Node *node);
- static void duplicateNode(QHashData::Node *originalNode, void *newNode);
- };
- template <class Key, class T>
- Q_INLINE_TEMPLATE void QHash<Key, T>::deleteNode(Node *node)
- {
- #ifdef Q_CC_BOR
- node->~QHashNode<Key, T>();
- #elif defined(QT_NO_PARTIAL_TEMPLATE_SPECIALIZATION)
- node->~QHashNode();
- #else
- node->~Node();
- #endif
- d->freeNode(node);
- }
- template <class Key, class T>
- Q_INLINE_TEMPLATE void QHash<Key, T>::duplicateNode(QHashData::Node *node, void *newNode)
- {
- Node *concreteNode = concrete(node);
- if (QTypeInfo<T>::isDummy) {
- (void) new (newNode) DummyNode(concreteNode->key);
- } else {
- (void) new (newNode) Node(concreteNode->key, concreteNode->value);
- }
- }
- template <class Key, class T>
- Q_INLINE_TEMPLATE typename QHash<Key, T>::Node *
- QHash<Key, T>::createNode(uint ah, const Key &akey, const T &avalue, Node **anextNode)
- {
- Node *node;
- if (QTypeInfo<T>::isDummy) {
- node = reinterpret_cast<Node *>(new (d->allocateNode()) DummyNode(akey));
- } else {
- node = new (d->allocateNode()) Node(akey, avalue);
- }
- node->h = ah;
- node->next = *anextNode;
- *anextNode = node;
- ++d->size;
- return node;
- }
- template <class Key, class T>
- Q_INLINE_TEMPLATE QHash<Key, T> &QHash<Key, T>::unite(const QHash<Key, T> &other)
- {
- QHash<Key, T> copy(other);
- const_iterator it = copy.constEnd();
- while (it != copy.constBegin()) {
- --it;
- insertMulti(it.key(), it.value());
- }
- return *this;
- }
- template <class Key, class T>
- Q_OUTOFLINE_TEMPLATE void QHash<Key, T>::freeData(QHashData *x)
- {
- Node *e_for_x = reinterpret_cast<Node *>(x);
- Node **bucket = reinterpret_cast<Node **>(x->buckets);
- int n = x->numBuckets;
- while (n--) {
- Node *cur = *bucket++;
- while (cur != e_for_x) {
- Node *next = cur->next;
- deleteNode(cur);
- cur = next;
- }
- }
- x->destroyAndFree();
- }
- template <class Key, class T>
- Q_INLINE_TEMPLATE void QHash<Key, T>::clear()
- {
- *this = QHash<Key,T>();
- }
- template <class Key, class T>
- Q_OUTOFLINE_TEMPLATE void QHash<Key, T>::detach_helper()
- {
- QHashData *x = d->detach_helper(duplicateNode,
- QTypeInfo<T>::isDummy ? sizeof(DummyNode) : sizeof(Node));
- if (!d->ref.deref())
- freeData(d);
- d = x;
- }
- template <class Key, class T>
- Q_INLINE_TEMPLATE QHash<Key, T> &QHash<Key, T>::operator=(const QHash<Key, T> &other)
- {
- if (d != other.d) {
- other.d->ref.ref();
- if (!d->ref.deref())
- freeData(d);
- d = other.d;
- if (!d->sharable)
- detach_helper();
- }
- return *this;
- }
- template <class Key, class T>
- Q_INLINE_TEMPLATE const T QHash<Key, T>::value(const Key &akey) const
- {
- Node *node;
- if (d->size == 0 || (node = *findNode(akey)) == e) {
- return T();
- } else {
- return node->value;
- }
- }
- template <class Key, class T>
- Q_INLINE_TEMPLATE const T QHash<Key, T>::value(const Key &akey, const T &adefaultValue) const
- {
- Node *node;
- if (d->size == 0 || (node = *findNode(akey)) == e) {
- return adefaultValue;
- } else {
- return node->value;
- }
- }
- template <class Key, class T>
- Q_OUTOFLINE_TEMPLATE QList<Key> QHash<Key, T>::uniqueKeys() const
- {
- QList<Key> res;
- const_iterator i = begin();
- if (i != end()) {
- for (;;) {
- const Key &aKey = i.key();
- res.append(aKey);
- do {
- if (++i == end())
- goto break_out_of_outer_loop;
- } while (aKey == i.key());
- }
- }
- break_out_of_outer_loop:
- return res;
- }
- template <class Key, class T>
- Q_OUTOFLINE_TEMPLATE QList<Key> QHash<Key, T>::keys() const
- {
- QList<Key> res;
- const_iterator i = begin();
- while (i != end()) {
- res.append(i.key());
- ++i;
- }
- return res;
- }
- template <class Key, class T>
- Q_OUTOFLINE_TEMPLATE QList<Key> QHash<Key, T>::keys(const T &avalue) const
- {
- QList<Key> res;
- const_iterator i = begin();
- while (i != end()) {
- if (i.value() == avalue)
- res.append(i.key());
- ++i;
- }
- return res;
- }
- template <class Key, class T>
- Q_OUTOFLINE_TEMPLATE const Key QHash<Key, T>::key(const T &avalue) const
- {
- return key(avalue, Key());
- }
- template <class Key, class T>
- Q_OUTOFLINE_TEMPLATE const Key QHash<Key, T>::key(const T &avalue, const Key &defaultValue) const
- {
- const_iterator i = begin();
- while (i != end()) {
- if (i.value() == avalue)
- return i.key();
- ++i;
- }
- return defaultValue;
- }
- template <class Key, class T>
- Q_OUTOFLINE_TEMPLATE QList<T> QHash<Key, T>::values() const
- {
- QList<T> res;
- const_iterator i = begin();
- while (i != end()) {
- res.append(i.value());
- ++i;
- }
- return res;
- }
- template <class Key, class T>
- Q_OUTOFLINE_TEMPLATE QList<T> QHash<Key, T>::values(const Key &akey) const
- {
- QList<T> res;
- Node *node = *findNode(akey);
- if (node != e) {
- do {
- res.append(node->value);
- } while ((node = node->next) != e && node->key == akey);
- }
- return res;
- }
- template <class Key, class T>
- Q_OUTOFLINE_TEMPLATE int QHash<Key, T>::count(const Key &akey) const
- {
- int cnt = 0;
- Node *node = *findNode(akey);
- if (node != e) {
- do {
- ++cnt;
- } while ((node = node->next) != e && node->key == akey);
- }
- return cnt;
- }
- template <class Key, class T>
- Q_INLINE_TEMPLATE const T QHash<Key, T>::operator[](const Key &akey) const
- {
- return value(akey);
- }
- template <class Key, class T>
- Q_INLINE_TEMPLATE T &QHash<Key, T>::operator[](const Key &akey)
- {
- detach();
- uint h;
- Node **node = findNode(akey, &h);
- if (*node == e) {
- if (d->willGrow())
- node = findNode(akey, &h);
- return createNode(h, akey, T(), node)->value;
- }
- return (*node)->value;
- }
- template <class Key, class T>
- Q_INLINE_TEMPLATE typename QHash<Key, T>::iterator QHash<Key, T>::insert(const Key &akey,
- const T &avalue)
- {
- detach();
- uint h;
- Node **node = findNode(akey, &h);
- if (*node == e) {
- if (d->willGrow())
- node = findNode(akey, &h);
- return iterator(createNode(h, akey, avalue, node));
- }
- if (!QTypeInfo<T>::isDummy)
- (*node)->value = avalue;
- return iterator(*node);
- }
- template <class Key, class T>
- Q_INLINE_TEMPLATE typename QHash<Key, T>::iterator QHash<Key, T>::insertMulti(const Key &akey,
- const T &avalue)
- {
- detach();
- d->willGrow();
- uint h;
- Node **nextNode = findNode(akey, &h);
- return iterator(createNode(h, akey, avalue, nextNode));
- }
- template <class Key, class T>
- Q_OUTOFLINE_TEMPLATE int QHash<Key, T>::remove(const Key &akey)
- {
- detach();
- int oldSize = d->size;
- Node **node = findNode(akey);
- if (*node != e) {
- bool deleteNext = true;
- do {
- Node *next = (*node)->next;
- deleteNext = (next != e && next->key == (*node)->key);
- deleteNode(*node);
- *node = next;
- --d->size;
- } while (deleteNext);
- d->hasShrunk();
- }
- return oldSize - d->size;
- }
- template <class Key, class T>
- Q_OUTOFLINE_TEMPLATE T QHash<Key, T>::take(const Key &akey)
- {
- detach();
- Node **node = findNode(akey);
- if (*node != e) {
- T t = (*node)->value;
- Node *next = (*node)->next;
- deleteNode(*node);
- *node = next;
- --d->size;
- d->hasShrunk();
- return t;
- }
- return T();
- }
- template <class Key, class T>
- Q_OUTOFLINE_TEMPLATE typename QHash<Key, T>::iterator QHash<Key, T>::erase(iterator it)
- {
- if (it == iterator(e))
- return it;
- iterator ret = it;
- ++ret;
- Node *node = it;
- Node **node_ptr = reinterpret_cast<Node **>(&d->buckets[node->h % d->numBuckets]);
- while (*node_ptr != node)
- node_ptr = &(*node_ptr)->next;
- *node_ptr = node->next;
- deleteNode(node);
- --d->size;
- return ret;
- }
- template <class Key, class T>
- Q_INLINE_TEMPLATE void QHash<Key, T>::reserve(int asize)
- {
- detach();
- d->rehash(-qMax(asize, 1));
- }
- template <class Key, class T>
- Q_INLINE_TEMPLATE typename QHash<Key, T>::const_iterator QHash<Key, T>::find(const Key &akey) const
- {
- return const_iterator(*findNode(akey));
- }
- template <class Key, class T>
- Q_INLINE_TEMPLATE typename QHash<Key, T>::const_iterator QHash<Key, T>::constFind(const Key &akey) const
- {
- return const_iterator(*findNode(akey));
- }
- template <class Key, class T>
- Q_INLINE_TEMPLATE typename QHash<Key, T>::iterator QHash<Key, T>::find(const Key &akey)
- {
- detach();
- return iterator(*findNode(akey));
- }
- template <class Key, class T>
- Q_INLINE_TEMPLATE bool QHash<Key, T>::contains(const Key &akey) const
- {
- return *findNode(akey) != e;
- }
- template <class Key, class T>
- Q_OUTOFLINE_TEMPLATE typename QHash<Key, T>::Node **QHash<Key, T>::findNode(const Key &akey,
- uint *ahp) const
- {
- Node **node;
- uint h = qHash(akey);
- if (d->numBuckets) {
- node = reinterpret_cast<Node **>(&d->buckets[h % d->numBuckets]);
- Q_ASSERT(*node == e || (*node)->next);
- while (*node != e && !(*node)->same_key(h, akey))
- node = &(*node)->next;
- } else {
- node = const_cast<Node **>(reinterpret_cast<const Node * const *>(&e));
- }
- if (ahp)
- *ahp = h;
- return node;
- }
- template <class Key, class T>
- Q_OUTOFLINE_TEMPLATE bool QHash<Key, T>::operator==(const QHash<Key, T> &other) const
- {
- if (size() != other.size())
- return false;
- if (d == other.d)
- return true;
- const_iterator it = begin();
- while (it != end()) {
- const Key &akey = it.key();
- const_iterator it2 = other.find(akey);
- do {
- if (it2 == other.end() || !(it2.key() == akey))
- return false;
- if (!QTypeInfo<T>::isDummy && !(it.value() == it2.value()))
- return false;
- ++it;
- ++it2;
- } while (it != end() && it.key() == akey);
- }
- return true;
- }
- template <class Key, class T>
- class QMultiHash : public QHash<Key, T>
- {
- public:
- QMultiHash() {}
- QMultiHash(const QHash<Key, T> &other) : QHash<Key, T>(other) {}
- inline typename QHash<Key, T>::iterator replace(const Key &key, const T &value)
- { return QHash<Key, T>::insert(key, value); }
- inline typename QHash<Key, T>::iterator insert(const Key &key, const T &value)
- { return QHash<Key, T>::insertMulti(key, value); }
- inline QMultiHash &operator+=(const QMultiHash &other)
- { unite(other); return *this; }
- inline QMultiHash operator+(const QMultiHash &other) const
- { QMultiHash result = *this; result += other; return result; }
- #ifndef Q_NO_USING_KEYWORD
- using QHash<Key, T>::contains;
- using QHash<Key, T>::remove;
- using QHash<Key, T>::count;
- using QHash<Key, T>::find;
- using QHash<Key, T>::constFind;
- #else
- inline bool contains(const Key &key) const
- { return QHash<Key, T>::contains(key); }
- inline int remove(const Key &key)
- { return QHash<Key, T>::remove(key); }
- inline int count(const Key &key) const
- { return QHash<Key, T>::count(key); }
- inline int count() const
- { return QHash<Key, T>::count(); }
- inline typename QHash<Key, T>::iterator find(const Key &key)
- { return QHash<Key, T>::find(key); }
- inline typename QHash<Key, T>::const_iterator find(const Key &key) const
- { return QHash<Key, T>::find(key); }
- inline typename QHash<Key, T>::const_iterator constFind(const Key &key) const
- { return QHash<Key, T>::constFind(key); }
- #endif
- bool contains(const Key &key, const T &value) const;
- int remove(const Key &key, const T &value);
- int count(const Key &key, const T &value) const;
- typename QHash<Key, T>::iterator find(const Key &key, const T &value) {
- typename QHash<Key, T>::iterator i(find(key));
- typename QHash<Key, T>::iterator end(this->end());
- while (i != end && i.key() == key) {
- if (i.value() == value)
- return i;
- ++i;
- }
- return end;
- }
- typename QHash<Key, T>::const_iterator find(const Key &key, const T &value) const {
- typename QHash<Key, T>::const_iterator i(constFind(key));
- typename QHash<Key, T>::const_iterator end(QHash<Key, T>::constEnd());
- while (i != end && i.key() == key) {
- if (i.value() == value)
- return i;
- ++i;
- }
- return end;
- }
- typename QHash<Key, T>::const_iterator constFind(const Key &key, const T &value) const
- { return find(key, value); }
- private:
- T &operator[](const Key &key);
- const T operator[](const Key &key) const;
- };
- template <class Key, class T>
- Q_INLINE_TEMPLATE bool QMultiHash<Key, T>::contains(const Key &key, const T &value) const
- {
- return constFind(key, value) != QHash<Key, T>::constEnd();
- }
- template <class Key, class T>
- Q_INLINE_TEMPLATE int QMultiHash<Key, T>::remove(const Key &key, const T &value)
- {
- int n = 0;
- typename QHash<Key, T>::iterator i(find(key));
- typename QHash<Key, T>::const_iterator end(QHash<Key, T>::constEnd());
- while (i != end && i.key() == key) {
- if (i.value() == value) {
- i = erase(i);
- ++n;
- } else {
- ++i;
- }
- }
- return n;
- }
- template <class Key, class T>
- Q_INLINE_TEMPLATE int QMultiHash<Key, T>::count(const Key &key, const T &value) const
- {
- int n = 0;
- typename QHash<Key, T>::const_iterator i(constFind(key));
- typename QHash<Key, T>::const_iterator end(QHash<Key, T>::constEnd());
- while (i != end && i.key() == key) {
- if (i.value() == value)
- ++n;
- ++i;
- }
- return n;
- }
- Q_DECLARE_ASSOCIATIVE_ITERATOR(Hash)
- Q_DECLARE_MUTABLE_ASSOCIATIVE_ITERATOR(Hash)
- QT_END_NAMESPACE
- QT_END_HEADER
- #endif // QHASH_H