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| 1 | /**************************************************************************** | - |
| 2 | ** | - |
| 3 | ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies). | - |
| 4 | ** Contact: http://www.qt-project.org/legal | - |
| 5 | ** | - |
| 6 | ** This file is part of the QtCore module of the Qt Toolkit. | - |
| 7 | ** | - |
| 8 | ** $QT_BEGIN_LICENSE:LGPL$ | - |
| 9 | ** Commercial License Usage | - |
| 10 | ** Licensees holding valid commercial Qt licenses may use this file in | - |
| 11 | ** accordance with the commercial license agreement provided with the | - |
| 12 | ** Software or, alternatively, in accordance with the terms contained in | - |
| 13 | ** a written agreement between you and Digia. For licensing terms and | - |
| 14 | ** conditions see http://qt.digia.com/licensing. For further information | - |
| 15 | ** use the contact form at http://qt.digia.com/contact-us. | - |
| 16 | ** | - |
| 17 | ** GNU Lesser General Public License Usage | - |
| 18 | ** Alternatively, this file may be used under the terms of the GNU Lesser | - |
| 19 | ** General Public License version 2.1 as published by the Free Software | - |
| 20 | ** Foundation and appearing in the file LICENSE.LGPL included in the | - |
| 21 | ** packaging of this file. Please review the following information to | - |
| 22 | ** ensure the GNU Lesser General Public License version 2.1 requirements | - |
| 23 | ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. | - |
| 24 | ** | - |
| 25 | ** In addition, as a special exception, Digia gives you certain additional | - |
| 26 | ** rights. These rights are described in the Digia Qt LGPL Exception | - |
| 27 | ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. | - |
| 28 | ** | - |
| 29 | ** GNU General Public License Usage | - |
| 30 | ** Alternatively, this file may be used under the terms of the GNU | - |
| 31 | ** General Public License version 3.0 as published by the Free Software | - |
| 32 | ** Foundation and appearing in the file LICENSE.GPL included in the | - |
| 33 | ** packaging of this file. Please review the following information to | - |
| 34 | ** ensure the GNU General Public License version 3.0 requirements will be | - |
| 35 | ** met: http://www.gnu.org/copyleft/gpl.html. | - |
| 36 | ** | - |
| 37 | ** | - |
| 38 | ** $QT_END_LICENSE$ | - |
| 39 | ** | - |
| 40 | ****************************************************************************/ | - |
| 41 | | - |
| 42 | #include "qstringbuilder.h" | - |
| 43 | #include <QtCore/qtextcodec.h> | - |
| 44 | | - |
| 45 | QT_BEGIN_NAMESPACE | - |
| 46 | | - |
| 47 | /*! | - |
| 48 | \class QStringBuilder | - |
| 49 | \inmodule QtCore | - |
| 50 | \internal | - |
| 51 | \reentrant | - |
| 52 | \since 4.6 | - |
| 53 | | - |
| 54 | \brief The QStringBuilder class is a template class that provides a facility to build up QStrings from smaller chunks. | - |
| 55 | | - |
| 56 | \ingroup tools | - |
| 57 | \ingroup shared | - |
| 58 | \ingroup string-processing | - |
| 59 | | - |
| 60 | | - |
| 61 | To build a QString by multiple concatenations, QString::operator+() | - |
| 62 | is typically used. This causes \e{n - 1} reallocations when building | - |
| 63 | a string from \e{n} chunks. | - |
| 64 | | - |
| 65 | QStringBuilder uses expression templates to collect the individual | - |
| 66 | chunks, compute the total size, allocate the required amount of | - |
| 67 | memory for the final QString object, and copy the chunks into the | - |
| 68 | allocated memory. | - |
| 69 | | - |
| 70 | The QStringBuilder class is not to be used explicitly in user | - |
| 71 | code. Instances of the class are created as return values of the | - |
| 72 | operator%() function, acting on objects of type QString, | - |
| 73 | QLatin1String, QStringRef, QChar, QCharRef, | - |
| 74 | QLatin1Char, and \c char. | - |
| 75 | | - |
| 76 | Concatenating strings with operator%() generally yields better | - |
| 77 | performance then using \c QString::operator+() on the same chunks | - |
| 78 | if there are three or more of them, and performs equally well in other | - |
| 79 | cases. | - |
| 80 | | - |
| 81 | \sa QLatin1String, QString | - |
| 82 | */ | - |
| 83 | | - |
| 84 | /*! \fn QStringBuilder::QStringBuilder(const A &a, const B &b) | - |
| 85 | Constructs a QStringBuilder from \a a and \a b. | - |
| 86 | */ | - |
| 87 | | - |
| 88 | /* \fn QStringBuilder::operator%(const A &a, const B &b) | - |
| 89 | | - |
| 90 | Returns a \c QStringBuilder object that is converted to a QString object | - |
| 91 | when assigned to a variable of QString type or passed to a function that | - |
| 92 | takes a QString parameter. | - |
| 93 | | - |
| 94 | This function is usable with arguments of type \c QString, | - |
| 95 | \c QLatin1String, \c QStringRef, | - |
| 96 | \c QChar, \c QCharRef, \c QLatin1Char, and \c char. | - |
| 97 | */ | - |
| 98 | | - |
| 99 | /* \fn QByteArray QStringBuilder::toLatin1() const | - |
| 100 | Returns a Latin-1 representation of the string as a QByteArray. The | - |
| 101 | returned byte array is undefined if the string contains non-Latin1 | - |
| 102 | characters. | - |
| 103 | */ | - |
| 104 | /* \fn QByteArray QStringBuilder::toUtf8() const | - |
| 105 | Returns a UTF-8 representation of the string as a QByteArray. | - |
| 106 | */ | - |
| 107 | | - |
| 108 | | - |
| 109 | /*! | - |
| 110 | \internal | - |
| 111 | */ | - |
| 112 | void QAbstractConcatenable::convertFromAscii(const char *a, int len, QChar *&out) | - |
| 113 | { | - |
| 114 | if (len == -1) { evaluated: len == -1| yes Evaluation Count:8 | yes Evaluation Count:274 |
| 8-274 |
| 115 | if (!a) evaluated: !a| yes Evaluation Count:4 | yes Evaluation Count:4 |
| 4 |
| 116 | return; executed: return;Execution Count:4 | 4 |
| 117 | while (*a && uchar(*a) < 0x80U) evaluated: *a| yes Evaluation Count:4 | yes Evaluation Count:3 |
evaluated: uchar(*a) < 0x80U| yes Evaluation Count:3 | yes Evaluation Count:1 |
| 1-4 |
| 118 | *out++ = QLatin1Char(*a++); executed: *out++ = QLatin1Char(*a++);Execution Count:3 | 3 |
| 119 | if (!*a) evaluated: !*a| yes Evaluation Count:3 | yes Evaluation Count:1 |
| 1-3 |
| 120 | return; executed: return;Execution Count:3 | 3 |
| 121 | } else { executed: }Execution Count:1 | 1 |
| 122 | int i; executed (the execution status of this line is deduced): int i; | - |
| 123 | for (i = 0; i < len && uchar(a[i]) < 0x80U; ++i) evaluated: i < len| yes Evaluation Count:1388 | yes Evaluation Count:258 |
evaluated: uchar(a[i]) < 0x80U| yes Evaluation Count:1372 | yes Evaluation Count:16 |
| 16-1388 |
| 124 | *out++ = QLatin1Char(a[i]); executed: *out++ = QLatin1Char(a[i]);Execution Count:1372 | 1372 |
| 125 | if (i == len) evaluated: i == len| yes Evaluation Count:258 | yes Evaluation Count:16 |
| 16-258 |
| 126 | return; executed: return;Execution Count:258 | 258 |
| 127 | a += i; executed (the execution status of this line is deduced): a += i; | - |
| 128 | len -= i; executed (the execution status of this line is deduced): len -= i; | - |
| 129 | } executed: }Execution Count:16 | 16 |
| 130 | | - |
| 131 | // we need to complement with UTF-8 appending | - |
| 132 | QString tmp = QString::fromUtf8(a, len); executed (the execution status of this line is deduced): QString tmp = QString::fromUtf8(a, len); | - |
| 133 | memcpy(out, reinterpret_cast<const char *>(tmp.constData()), sizeof(QChar) * tmp.size()); executed (the execution status of this line is deduced): memcpy(out, reinterpret_cast<const char *>(tmp.constData()), sizeof(QChar) * tmp.size()); | - |
| 134 | out += tmp.size(); executed (the execution status of this line is deduced): out += tmp.size(); | - |
| 135 | } executed: }Execution Count:17 | 17 |
| 136 | | - |
| 137 | QT_END_NAMESPACE | - |
| 138 | | - |
| | |