qbitarray.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.
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- ** 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
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- #ifndef QBITARRAY_H
- #define QBITARRAY_H
- #include <QtCore/qbytearray.h>
- QT_BEGIN_HEADER
- QT_BEGIN_NAMESPACE
- QT_MODULE(Core)
- class QBitRef;
- class Q_CORE_EXPORT QBitArray
- {
- friend Q_CORE_EXPORT QDataStream &operator<<(QDataStream &, const QBitArray &);
- friend Q_CORE_EXPORT QDataStream &operator>>(QDataStream &, QBitArray &);
- friend Q_CORE_EXPORT uint qHash(const QBitArray &key);
- QByteArray d;
- public:
- inline QBitArray() {}
- explicit QBitArray(int size, bool val = false);
- QBitArray(const QBitArray &other) : d(other.d) {}
- inline QBitArray &operator=(const QBitArray &other) { d = other.d; return *this; }
- inline int size() const { return (d.size() << 3) - *d.constData(); }
- inline int count() const { return (d.size() << 3) - *d.constData(); }
- int count(bool on) const;
- // ### Qt 5: Store the number of set bits separately
- inline bool isEmpty() const { return d.isEmpty(); }
- inline bool isNull() const { return d.isNull(); }
- void resize(int size);
- inline void detach() { d.detach(); }
- inline bool isDetached() const { return d.isDetached(); }
- inline void clear() { d.clear(); }
- bool testBit(int i) const;
- void setBit(int i);
- void setBit(int i, bool val);
- void clearBit(int i);
- bool toggleBit(int i);
- bool at(int i) const;
- QBitRef operator[](int i);
- bool operator[](int i) const;
- QBitRef operator[](uint i);
- bool operator[](uint i) const;
- QBitArray& operator&=(const QBitArray &);
- QBitArray& operator|=(const QBitArray &);
- QBitArray& operator^=(const QBitArray &);
- QBitArray operator~() const;
- inline bool operator==(const QBitArray& a) const { return d == a.d; }
- inline bool operator!=(const QBitArray& a) const { return d != a.d; }
- inline bool fill(bool val, int size = -1);
- void fill(bool val, int first, int last);
- inline void truncate(int pos) { if (pos < size()) resize(pos); }
- public:
- typedef QByteArray::DataPtr DataPtr;
- inline DataPtr &data_ptr() { return d.data_ptr(); }
- };
- inline bool QBitArray::fill(bool aval, int asize)
- { *this = QBitArray((asize < 0 ? this->size() : asize), aval); return true; }
- Q_CORE_EXPORT QBitArray operator&(const QBitArray &, const QBitArray &);
- Q_CORE_EXPORT QBitArray operator|(const QBitArray &, const QBitArray &);
- Q_CORE_EXPORT QBitArray operator^(const QBitArray &, const QBitArray &);
- inline bool QBitArray::testBit(int i) const
- { Q_ASSERT(i >= 0 && i < size());
- return (*(reinterpret_cast<const uchar*>(d.constData())+1+(i>>3)) & (1 << (i & 7))) != 0; }
- inline void QBitArray::setBit(int i)
- { Q_ASSERT(i >= 0 && i < size());
- *(reinterpret_cast<uchar*>(d.data())+1+(i>>3)) |= (1 << (i & 7)); }
- inline void QBitArray::clearBit(int i)
- { Q_ASSERT(i >= 0 && i < size());
- *(reinterpret_cast<uchar*>(d.data())+1+(i>>3)) &= ~(1 << (i & 7)); }
- inline void QBitArray::setBit(int i, bool val)
- { if (val) setBit(i); else clearBit(i); }
- inline bool QBitArray::toggleBit(int i)
- { Q_ASSERT(i >= 0 && i < size());
- uchar b = 1<< (i&7); uchar* p = reinterpret_cast<uchar*>(d.data())+1+(i>>3);
- uchar c = *p&b; *p^=b; return c!=0; }
- inline bool QBitArray::operator[](int i) const { return testBit(i); }
- inline bool QBitArray::operator[](uint i) const { return testBit(i); }
- inline bool QBitArray::at(int i) const { return testBit(i); }
- class Q_CORE_EXPORT QBitRef
- {
- private:
- QBitArray& a;
- int i;
- inline QBitRef(QBitArray& array, int idx) : a(array), i(idx) {}
- friend class QBitArray;
- public:
- inline operator bool() const { return a.testBit(i); }
- inline bool operator!() const { return !a.testBit(i); }
- QBitRef& operator=(const QBitRef& val) { a.setBit(i, val); return *this; }
- QBitRef& operator=(bool val) { a.setBit(i, val); return *this; }
- };
- inline QBitRef QBitArray::operator[](int i)
- { Q_ASSERT(i >= 0); return QBitRef(*this, i); }
- inline QBitRef QBitArray::operator[](uint i)
- { return QBitRef(*this, i); }
- #ifndef QT_NO_DATASTREAM
- Q_CORE_EXPORT QDataStream &operator<<(QDataStream &, const QBitArray &);
- Q_CORE_EXPORT QDataStream &operator>>(QDataStream &, QBitArray &);
- #endif
- Q_DECLARE_TYPEINFO(QBitArray, Q_MOVABLE_TYPE);
- Q_DECLARE_SHARED(QBitArray)
- QT_END_NAMESPACE
- QT_END_HEADER
- #endif // QBITARRAY_H