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Diffstat (limited to 'src/tools/quuid.cpp')
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diff --git a/src/tools/quuid.cpp b/src/tools/quuid.cpp new file mode 100644 index 0000000..ee663d7 --- /dev/null +++ b/src/tools/quuid.cpp @@ -0,0 +1,421 @@ +/**************************************************************************** +** +** Implementation of QUuid class +** +** Copyright (C) 2000-2008 Trolltech ASA. All rights reserved. +** +** This file is part of the tools module of the Qt GUI Toolkit. +** +** 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 files LICENSE.GPL2 +** and LICENSE.GPL3 included in the packaging of this file. +** Alternatively you may (at your option) use any later version +** of the GNU General Public License if such license has been +** publicly approved by Trolltech ASA (or its successors, if any) +** and the KDE Free Qt Foundation. +** +** Please review the following information to ensure GNU General +** Public Licensing requirements will be met: +** http://trolltech.com/products/qt/licenses/licensing/opensource/. +** If you are unsure which license is appropriate for your use, please +** review the following information: +** http://trolltech.com/products/qt/licenses/licensing/licensingoverview +** or contact the sales department at sales@trolltech.com. +** +** This file may be used under the terms of the Q Public License as +** defined by Trolltech ASA and appearing in the file LICENSE.QPL +** included in the packaging of this file. Licensees holding valid Qt +** Commercial licenses may use this file in accordance with the Qt +** Commercial License Agreement provided with the Software. +** +** This file is provided "AS IS" with NO WARRANTY OF ANY KIND, +** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted +** herein. +** +**********************************************************************/ + +#include "quuid.h" + +#include "qdatastream.h" + +/*! + \class QUuid quuid.h + \brief The QUuid class defines a Universally Unique Identifier (UUID). + + \reentrant + + For objects or declarations that must be uniquely identified, + UUIDs (also known as GUIDs) are widely used in order to assign a + fixed and easy to compare value to the object or declaration. The + 128-bit value of a UUID is generated by an algorithm that + guarantees that the value is unique. + + In Qt, UUIDs are wrapped by the QUuid struct which provides + convenience functions for handling UUIDs. Most platforms provide a + tool to generate new UUIDs, for example, uuidgen and guidgen. + + UUIDs generated by QUuid, are based on the \c Random version of the + \c DCE (Distributed Computing Environment) standard. + + UUIDs can be constructed from numeric values or from strings, or + using the static createUuid() function. They can be converted to a + string with toString(). UUIDs have a variant() and a version(), + and null UUIDs return TRUE from isNull(). +*/ + +/*! + \fn QUuid::QUuid() + + Creates the null UUID {00000000-0000-0000-0000-000000000000}. +*/ + +/*! + \fn QUuid::QUuid( uint l, ushort w1, ushort w2, uchar b1, uchar b2, uchar b3, uchar b4, uchar b5, uchar b6, uchar b7, uchar b8 ) + + Creates a UUID with the value specified by the parameters, \a l, + \a w1, \a w2, \a b1, \a b2, \a b3, \a b4, \a b5, \a b6, \a b7, \a + b8. + + Example: + \code + // {67C8770B-44F1-410A-AB9A-F9B5446F13EE} + QUuid IID_MyInterface( 0x67c8770b, 0x44f1, 0x410a, 0xab, 0x9a, 0xf9, 0xb5, 0x44, 0x6f, 0x13, 0xee ) + \endcode +*/ + +/*! + \fn QUuid::QUuid( const QUuid &orig ) + + Creates a copy of the QUuid \a orig. +*/ +#ifndef QT_NO_QUUID_STRING +/*! + Creates a QUuid object from the string \a text. The function can + only convert a string in the format + {HHHHHHHH-HHHH-HHHH-HHHH-HHHHHHHHHHHH} (where 'H' stands for a hex + digit). If the conversion fails a null UUID is created. +*/ +QUuid::QUuid( const QString &text ) +{ + bool ok; + if ( text.isEmpty() ) { + *this = QUuid(); + return; + } + QString temp = text.upper(); + if ( temp[0] != '{' ) + temp = "{" + text; + if ( text[(int)text.length()-1] != '}' ) + temp += "}"; + + data1 = temp.mid( 1, 8 ).toULong( &ok, 16 ); + if ( !ok ) { + *this = QUuid(); + return; + } + + data2 = temp.mid( 10, 4 ).toUInt( &ok, 16 ); + if ( !ok ) { + *this = QUuid(); + return; + } + data3 = temp.mid( 15, 4 ).toUInt( &ok, 16 ); + if ( !ok ) { + *this = QUuid(); + return; + } + data4[0] = temp.mid( 20, 2 ).toUInt( &ok, 16 ); + if ( !ok ) { + *this = QUuid(); + return; + } + data4[1] = temp.mid( 22, 2 ).toUInt( &ok, 16 ); + if ( !ok ) { + *this = QUuid(); + return; + } + for ( int i = 2; i<8; i++ ) { + data4[i] = temp.mid( 25 + (i-2)*2, 2 ).toUShort( &ok, 16 ); + if ( !ok ) { + *this = QUuid(); + return; + } + } +} + +/*! + \internal +*/ +QUuid::QUuid( const char *text ) +{ + *this = QUuid( QString(text) ); +} +#endif +/*! + \fn QUuid QUuid::operator=(const QUuid &uuid ) + + Assigns the value of \a uuid to this QUuid object. +*/ + +/*! + \fn bool QUuid::operator==(const QUuid &other) const + + Returns TRUE if this QUuid and the \a other QUuid are identical; + otherwise returns FALSE. +*/ + +/*! + \fn bool QUuid::operator!=(const QUuid &other) const + + Returns TRUE if this QUuid and the \a other QUuid are different; + otherwise returns FALSE. +*/ +#ifndef QT_NO_QUUID_STRING +/*! + \fn QUuid::operator QString() const + + Returns the string representation of the uuid. + + \sa toString() +*/ + +/*! + QString QUuid::toString() const + + Returns the string representation of the uuid. +*/ +QString QUuid::toString() const +{ + QString result; + + result = "{" + QString::number( data1, 16 ).rightJustify( 8, '0' ) + "-"; + result += QString::number( (int)data2, 16 ).rightJustify( 4, '0' ) + "-"; + result += QString::number( (int)data3, 16 ).rightJustify( 4, '0' ) + "-"; + result += QString::number( (int)data4[0], 16 ).rightJustify( 2, '0' ); + result += QString::number( (int)data4[1], 16 ).rightJustify( 2, '0' ) + "-"; + for ( int i = 2; i < 8; i++ ) + result += QString::number( (int)data4[i], 16 ).rightJustify( 2, '0' ); + + return result + "}"; +} +#endif + +#ifndef QT_NO_DATASTREAM +/*! + \relates QUuid + Writes the uuid \a id to the datastream \a s. +*/ +QDataStream &operator<<( QDataStream &s, const QUuid &id ) +{ + s << (Q_UINT32)id.data1; + s << (Q_UINT16)id.data2; + s << (Q_UINT16)id.data3; + for (int i = 0; i < 8; i++ ) + s << (Q_UINT8)id.data4[i]; + return s; +} + +/*! + \relates QUuid + Reads uuid from from the stream \a s into \a id. +*/ +QDataStream &operator>>( QDataStream &s, QUuid &id ) +{ + Q_UINT32 u32; + Q_UINT16 u16; + Q_UINT8 u8; + s >> u32; + id.data1 = u32; + s >> u16; + id.data2 = u16; + s >> u16; + id.data3 = u16; + for (int i = 0; i < 8; i++ ) { + s >> u8; + id.data4[i] = u8; + } + return s; +} +#endif + +/*! + Returns TRUE if this is the null UUID + {00000000-0000-0000-0000-000000000000}; otherwise returns FALSE. +*/ +bool QUuid::isNull() const +{ + return data4[0] == 0 && data4[1] == 0 && data4[2] == 0 && data4[3] == 0 && + data4[4] == 0 && data4[5] == 0 && data4[6] == 0 && data4[7] == 0 && + data1 == 0 && data2 == 0 && data3 == 0; +} + +/*! + \enum QUuid::Variant + + This enum defines the variant of the UUID, which is the scheme + which defines the layout of the 128-bits value. + + \value VarUnknown Variant is unknown + \value NCS Reserved for NCS (Network Computing System) backward compatibility + \value DCE Distributed Computing Environment, the scheme used by QUuid + \value Microsoft Reserved for Microsoft backward compatibility (GUID) + \value Reserved Reserved for future definition +*/ + +/*! + \enum QUuid::Version + + This enum defines the version of the UUID. + + \value VerUnknown Version is unknown + \value Time Time-based, by using timestamp, clock sequence, and + MAC network card address (if available) for the node sections + \value EmbeddedPOSIX DCE Security version, with embedded POSIX UUIDs + \value Name Name-based, by using values from a name for all sections + \value Random Random-based, by using random numbers for all sections +*/ + +/*! + \fn QUuid::Variant QUuid::variant() const + + Returns the variant of the UUID. + The null UUID is considered to be of an unknown variant. + + \sa version() +*/ +QUuid::Variant QUuid::variant() const +{ + if ( isNull() ) + return VarUnknown; + // Check the 3 MSB of data4[0] + if ( (data4[0] & 0x80) == 0x00 ) return NCS; + else if ( (data4[0] & 0xC0) == 0x80 ) return DCE; + else if ( (data4[0] & 0xE0) == 0xC0 ) return Microsoft; + else if ( (data4[0] & 0xE0) == 0xE0 ) return Reserved; + return VarUnknown; +} + +/*! + \fn QUuid::Version QUuid::version() const + + Returns the version of the UUID, if the UUID is of the DCE + variant; otherwise returns VerUnknown. + + \sa variant() +*/ +QUuid::Version QUuid::version() const +{ + // Check the 4 MSB of data3 + Version ver = (Version)(data3>>12); + if ( isNull() + || (variant() != DCE) + || ver < Time + || ver > Random ) + return VerUnknown; + return ver; +} + +/*! + \fn bool QUuid::operator<(const QUuid &other) const + + Returns TRUE if this QUuid is of the same variant, + and lexicographically before the \a other QUuid; + otherwise returns FALSE. + + \sa variant() +*/ +#define ISLESS(f1, f2) if (f1!=f2) return (f1<f2); +bool QUuid::operator<(const QUuid &other ) const +{ + if ( variant() != other.variant() ) + return FALSE; + + ISLESS( data1, other.data1 ); + ISLESS( data2, other.data2 ); + ISLESS( data3, other.data3 ); + for ( int n = 0; n < 8; n++ ) { + ISLESS( data4[n], other.data4[n] ); + } + return FALSE; +} + +/*! + \fn bool QUuid::operator>(const QUuid &other) const + + Returns TRUE if this QUuid is of the same variant, + and lexicographically after the \a other QUuid; + otherwise returns FALSE. + + \sa variant() +*/ +#define ISMORE(f1, f2) if (f1!=f2) return (f1>f2); +bool QUuid::operator>(const QUuid &other ) const +{ + if ( variant() != other.variant() ) + return FALSE; + + ISMORE( data1, other.data1 ); + ISMORE( data2, other.data2 ); + ISMORE( data3, other.data3 ); + for ( int n = 0; n < 8; n++ ) { + ISMORE( data4[n], other.data4[n] ); + } + return FALSE; +} + +/*! + \fn QUuid QUuid::createUuid() + + Returns a new UUID of \c DCE variant, and \c Random type. The + UUIDs generated are based on the platform specific pseudo-random + generator, which is usually not a cryptographic-quality random + number generator. Therefore, a UUID is not guaranteed to be unique + cross application instances. + + On Windows, the new UUID is extremely likely to be unique on the + same or any other system, networked or not. + + \sa variant(), version() +*/ +#if defined(Q_OS_WIN32) +#include <objbase.h> // For CoCreateGuid +QUuid QUuid::createUuid() +{ + GUID guid; + CoCreateGuid( &guid ); + QUuid result = guid; + return result; +} +#else // !Q_OS_WIN32 +#include "qdatetime.h" +#include "stdlib.h" // For srand/rand +QUuid QUuid::createUuid() +{ + static const int intbits = sizeof(int)*8; + static int randbits = 0; + if ( !randbits ) { + int max = RAND_MAX; + do { ++randbits; } while ( (max=max>>1) ); + srand( (uint)QDateTime::currentDateTime().toTime_t() ); + rand(); // Skip first + } + + QUuid result; + uint *data = &(result.data1); + int chunks = 16 / sizeof(uint); + while ( chunks-- ) { + uint randNumber = 0; + for ( int filled = 0; filled < intbits; filled += randbits ) + randNumber |= rand()<<filled; + *(data+chunks) = randNumber; + } + + result.data4[0] = (result.data4[0] & 0x3F) | 0x80; // UV_DCE + result.data3 = (result.data3 & 0x0FFF) | 0x4000; // UV_Random + + return result; +} +#endif // !Q_OS_WIN32 + |