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435 lines
12 KiB
435 lines
12 KiB
/****************************************************************************
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**
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** Implementation of TQUuid class
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**
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** Copyright (C) 2000-2008 Trolltech ASA. All rights reserved.
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**
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** This file is part of the tools module of the TQt GUI Toolkit.
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**
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** This file may be used under the terms of the GNU General
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** Public License versions 2.0 or 3.0 as published by the Free
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** Software Foundation and appearing in the files LICENSE.GPL2
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** and LICENSE.GPL3 included in the packaging of this file.
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** Alternatively you may (at your option) use any later version
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** of the GNU General Public License if such license has been
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** publicly approved by Trolltech ASA (or its successors, if any)
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** and the KDE Free TQt Foundation.
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**
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** Please review the following information to ensure GNU General
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** Public Licensing requirements will be met:
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** http://trolltech.com/products/qt/licenses/licensing/opensource/.
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** If you are unsure which license is appropriate for your use, please
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** review the following information:
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** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
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** or contact the sales department at sales@trolltech.com.
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**
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** This file may be used under the terms of the Q Public License as
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** defined by Trolltech ASA and appearing in the file LICENSE.TQPL
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** included in the packaging of this file. Licensees holding valid TQt
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** Commercial licenses may use this file in accordance with the TQt
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** Commercial License Agreement provided with the Software.
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**
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** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
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** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
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** herein.
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**
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**********************************************************************/
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#include "ntquuid.h"
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#include "ntqdatastream.h"
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/*!
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\class TQUuid ntquuid.h
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\brief The TQUuid class defines a Universally Unique Identifier (UUID).
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\reentrant
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For objects or declarations that must be uniquely identified,
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UUIDs (also known as GUIDs) are widely used in order to assign a
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fixed and easy to compare value to the object or declaration. The
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128-bit value of a UUID is generated by an algorithm that
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guarantees that the value is unique.
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In TQt, UUIDs are wrapped by the TQUuid struct which provides
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convenience functions for handling UUIDs. Most platforms provide a
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tool to generate new UUIDs, for example, uuidgen and guidgen.
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UUIDs generated by TQUuid, are based on the \c Random version of the
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\c DCE (Distributed Computing Environment) standard.
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UUIDs can be constructed from numeric values or from strings, or
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using the static createUuid() function. They can be converted to a
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string with toString(). UUIDs have a variant() and a version(),
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and null UUIDs return TRUE from isNull().
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*/
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/*!
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\fn TQUuid::TQUuid()
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Creates the null UUID {00000000-0000-0000-0000-000000000000}.
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*/
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/*!
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\fn TQUuid::TQUuid( uint l, ushort w1, ushort w2, uchar b1, uchar b2, uchar b3, uchar b4, uchar b5, uchar b6, uchar b7, uchar b8 )
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Creates a UUID with the value specified by the parameters, \a l,
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\a w1, \a w2, \a b1, \a b2, \a b3, \a b4, \a b5, \a b6, \a b7, \a
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b8.
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Example:
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\code
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// {67C8770B-44F1-410A-AB9A-F9B5446F13EE}
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TQUuid IID_MyInterface( 0x67c8770b, 0x44f1, 0x410a, 0xab, 0x9a, 0xf9, 0xb5, 0x44, 0x6f, 0x13, 0xee )
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\endcode
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*/
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/*!
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\fn TQUuid::TQUuid( const TQUuid &orig )
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Creates a copy of the TQUuid \a orig.
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*/
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#ifndef TQT_NO_QUUID_STRING
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/*!
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Creates a TQUuid object from the string \a text. The function can
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only convert a string in the format
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{HHHHHHHH-HHHH-HHHH-HHHH-HHHHHHHHHHHH} (where 'H' stands for a hex
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digit). If the conversion fails a null UUID is created.
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*/
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TQUuid::TQUuid( const TQString &text )
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{
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bool ok;
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if ( text.isEmpty() ) {
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*this = TQUuid();
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return;
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}
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TQString temp = text.upper();
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if ( temp[0] != '{' )
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temp = "{" + text;
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if ( text[(int)text.length()-1] != '}' )
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temp += "}";
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data1 = temp.mid( 1, 8 ).toULong( &ok, 16 );
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if ( !ok ) {
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*this = TQUuid();
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return;
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}
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data2 = temp.mid( 10, 4 ).toUInt( &ok, 16 );
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if ( !ok ) {
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*this = TQUuid();
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return;
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}
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data3 = temp.mid( 15, 4 ).toUInt( &ok, 16 );
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if ( !ok ) {
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*this = TQUuid();
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return;
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}
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data4[0] = temp.mid( 20, 2 ).toUInt( &ok, 16 );
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if ( !ok ) {
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*this = TQUuid();
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return;
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}
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data4[1] = temp.mid( 22, 2 ).toUInt( &ok, 16 );
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if ( !ok ) {
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*this = TQUuid();
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return;
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}
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for ( int i = 2; i<8; i++ ) {
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data4[i] = temp.mid( 25 + (i-2)*2, 2 ).toUShort( &ok, 16 );
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if ( !ok ) {
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*this = TQUuid();
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return;
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}
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}
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}
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/*!
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\internal
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*/
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TQUuid::TQUuid( const char *text )
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{
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*this = TQUuid( TQString(text) );
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}
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#endif
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/*!
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\fn TQUuid TQUuid::operator=(const TQUuid &uuid )
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Assigns the value of \a uuid to this TQUuid object.
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*/
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/*!
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\fn bool TQUuid::operator==(const TQUuid &other) const
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Returns TRUE if this TQUuid and the \a other TQUuid are identical;
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otherwise returns FALSE.
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*/
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/*!
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\fn bool TQUuid::operator!=(const TQUuid &other) const
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Returns TRUE if this TQUuid and the \a other TQUuid are different;
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otherwise returns FALSE.
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*/
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#ifndef TQT_NO_QUUID_STRING
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/*!
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\fn TQUuid::operator TQString() const
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Returns the string representation of the uuid.
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\sa toString()
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*/
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/*!
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TQString TQUuid::toString() const
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Returns the string representation of the uuid.
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*/
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TQString TQUuid::toString() const
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{
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TQString result;
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result = "{" + TQString::number( data1, 16 ).rightJustify( 8, '0' ) + "-";
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result += TQString::number( (int)data2, 16 ).rightJustify( 4, '0' ) + "-";
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result += TQString::number( (int)data3, 16 ).rightJustify( 4, '0' ) + "-";
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result += TQString::number( (int)data4[0], 16 ).rightJustify( 2, '0' );
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result += TQString::number( (int)data4[1], 16 ).rightJustify( 2, '0' ) + "-";
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for ( int i = 2; i < 8; i++ )
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result += TQString::number( (int)data4[i], 16 ).rightJustify( 2, '0' );
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return result + "}";
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}
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#endif
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#ifndef TQT_NO_DATASTREAM
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/*!
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\relates TQUuid
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Writes the uuid \a id to the datastream \a s.
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*/
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TQDataStream &operator<<( TQDataStream &s, const TQUuid &id )
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{
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s << (TQ_UINT32)id.data1;
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s << (TQ_UINT16)id.data2;
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s << (TQ_UINT16)id.data3;
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for (int i = 0; i < 8; i++ )
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s << (TQ_UINT8)id.data4[i];
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return s;
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}
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/*!
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\relates TQUuid
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Reads uuid from from the stream \a s into \a id.
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*/
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TQDataStream &operator>>( TQDataStream &s, TQUuid &id )
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{
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TQ_UINT32 u32;
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TQ_UINT16 u16;
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TQ_UINT8 u8;
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s >> u32;
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id.data1 = u32;
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s >> u16;
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id.data2 = u16;
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s >> u16;
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id.data3 = u16;
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for (int i = 0; i < 8; i++ ) {
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s >> u8;
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id.data4[i] = u8;
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}
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return s;
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}
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#endif
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/*!
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Returns TRUE if this is the null UUID
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{00000000-0000-0000-0000-000000000000}; otherwise returns FALSE.
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*/
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bool TQUuid::isNull() const
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{
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return data4[0] == 0 && data4[1] == 0 && data4[2] == 0 && data4[3] == 0 &&
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data4[4] == 0 && data4[5] == 0 && data4[6] == 0 && data4[7] == 0 &&
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data1 == 0 && data2 == 0 && data3 == 0;
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}
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/*!
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\enum TQUuid::Variant
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This enum defines the variant of the UUID, which is the scheme
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which defines the layout of the 128-bits value.
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\value VarUnknown Variant is unknown
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\value NCS Reserved for NCS (Network Computing System) backward compatibility
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\value DCE Distributed Computing Environment, the scheme used by TQUuid
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\value Microsoft Reserved for Microsoft backward compatibility (GUID)
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\value Reserved Reserved for future definition
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*/
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/*!
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\enum TQUuid::Version
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This enum defines the version of the UUID.
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\value VerUnknown Version is unknown
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\value Time Time-based, by using timestamp, clock sequence, and
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MAC network card address (if available) for the node sections
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\value EmbeddedPOSIX DCE Security version, with embedded POSIX UUIDs
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\value Name Name-based, by using values from a name for all sections
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\value Random Random-based, by using random numbers for all sections
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*/
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/*!
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\fn TQUuid::Variant TQUuid::variant() const
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Returns the variant of the UUID.
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The null UUID is considered to be of an unknown variant.
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\sa version()
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*/
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TQUuid::Variant TQUuid::variant() const
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{
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if ( isNull() )
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return VarUnknown;
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// Check the 3 MSB of data4[0]
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if ( (data4[0] & 0x80) == 0x00 ) return NCS;
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else if ( (data4[0] & 0xC0) == 0x80 ) return DCE;
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else if ( (data4[0] & 0xE0) == 0xC0 ) return Microsoft;
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else if ( (data4[0] & 0xE0) == 0xE0 ) return Reserved;
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return VarUnknown;
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}
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/*!
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\fn TQUuid::Version TQUuid::version() const
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Returns the version of the UUID, if the UUID is of the DCE
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variant; otherwise returns VerUnknown.
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\sa variant()
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*/
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TQUuid::Version TQUuid::version() const
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{
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// Check the 4 MSB of data3
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Version ver = (Version)(data3>>12);
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if ( isNull()
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|| (variant() != DCE)
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|| ver < Time
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|| ver > Random )
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return VerUnknown;
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return ver;
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}
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/*!
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\fn bool TQUuid::operator<(const TQUuid &other) const
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Returns TRUE if this TQUuid is of the same variant,
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and lexicographically before the \a other TQUuid;
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otherwise returns FALSE.
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\sa variant()
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*/
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#define ISLESS(f1, f2) if (f1!=f2) return (f1<f2);
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bool TQUuid::operator<(const TQUuid &other ) const
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{
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if ( variant() != other.variant() )
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return FALSE;
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ISLESS( data1, other.data1 );
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ISLESS( data2, other.data2 );
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ISLESS( data3, other.data3 );
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for ( int n = 0; n < 8; n++ ) {
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ISLESS( data4[n], other.data4[n] );
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}
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return FALSE;
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}
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/*!
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\fn bool TQUuid::operator>(const TQUuid &other) const
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Returns TRUE if this TQUuid is of the same variant,
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and lexicographically after the \a other TQUuid;
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otherwise returns FALSE.
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\sa variant()
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*/
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#define ISMORE(f1, f2) if (f1!=f2) return (f1>f2);
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bool TQUuid::operator>(const TQUuid &other ) const
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{
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if ( variant() != other.variant() )
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return FALSE;
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ISMORE( data1, other.data1 );
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ISMORE( data2, other.data2 );
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ISMORE( data3, other.data3 );
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for ( int n = 0; n < 8; n++ ) {
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ISMORE( data4[n], other.data4[n] );
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}
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return FALSE;
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}
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/*!
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\fn TQUuid TQUuid::createUuid()
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Returns a new UUID of \c DCE variant, and \c Random type. The
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UUIDs generated are based on the platform specific pseudo-random
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generator, which is usually not a cryptographic-quality random
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number generator. Therefore, a UUID is not guaranteed to be unique
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cross application instances.
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On Windows, the new UUID is extremely likely to be unique on the
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same or any other system, networked or not.
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\sa variant(), version()
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*/
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#if defined(Q_OS_WIN32)
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#include <objbase.h> // For CoCreateGuid
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TQUuid TQUuid::createUuid()
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{
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GUID guid;
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CoCreateGuid( &guid );
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TQUuid result = guid;
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return result;
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}
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#else // !Q_OS_WIN32
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#if defined(Q_OS_LINUX)
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#include <uuid/uuid.h>
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TQUuid TQUuid::createUuid()
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{
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uuid_t raw_uuid;
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char uuid_string[37];
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uuid_generate(raw_uuid);
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uuid_unparse(raw_uuid, uuid_string);
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return TQUuid(uuid_string);
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}
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#else // !Q_OS_LINUX
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#include "ntqdatetime.h"
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#include "stdlib.h" // For srand/rand
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TQUuid TQUuid::createUuid()
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{
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static const int intbits = sizeof(int)*8;
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static int randbits = 0;
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if ( !randbits ) {
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int max = RAND_MAX;
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do { ++randbits; } while ( (max=max>>1) );
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srand( (uint)TQDateTime::currentDateTime().toTime_t() );
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rand(); // Skip first
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}
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TQUuid result;
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uint *data = &(result.data1);
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int chunks = 16 / sizeof(uint);
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while ( chunks-- ) {
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uint randNumber = 0;
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for ( int filled = 0; filled < intbits; filled += randbits )
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randNumber |= rand()<<filled;
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*(data+chunks) = randNumber;
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}
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result.data4[0] = (result.data4[0] & 0x3F) | 0x80; // UV_DCE
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result.data3 = (result.data3 & 0x0FFF) | 0x4000; // UV_Random
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return result;
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}
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#endif // !Q_OS_LINUX
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#endif // !Q_OS_WIN32
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