diff options
author | Lars Knoll <lars.knoll@qt.io> | 2020-04-26 11:45:27 +0200 |
---|---|---|
committer | Lars Knoll <lars.knoll@qt.io> | 2020-05-14 07:48:28 +0200 |
commit | a383d797727b64770768babffc564d07e02a90b7 (patch) | |
tree | 62e3411aac05e964b5feec5a8602b164f549a4fb /src/corelib/io/qsettings.cpp | |
parent | 1cab047d088a397b00f5adc8febeac467fc4831d (diff) |
Get rid of QSettings::iniCodec()
Always encodee INI files as utf-8 in Qt6. This is mostly backwards
compatible, as old ini files would encode all non ascii characters.
[ChangeLog][Important behavioral changes] QSettings will now always
encode INI files as utf-8 (and the iniCodec/setIniCode methods are
removed). This is a change from Qt 5 and earlier, where QSettings would
by default escape all non ascii characters. The behavior is equivalent to
what you got in Qt5 by setting a utf-8 iniCodec on the settings object.
Settings files written in Qt 5 will still be readable in Qt 6 (unless
an iniCodec different from utf-8 was used), but to read Qt6 based ini
files in Qt 5 applications, setting the iniCodec to utf-8 is required.
Change-Id: Ic7dffcca17779bd5e3dae50d42ce633170289f6c
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Alex Blasche <alexander.blasche@qt.io>
Diffstat (limited to 'src/corelib/io/qsettings.cpp')
-rw-r--r-- | src/corelib/io/qsettings.cpp | 138 |
1 files changed, 34 insertions, 104 deletions
diff --git a/src/corelib/io/qsettings.cpp b/src/corelib/io/qsettings.cpp index 2eeed3f57c..eeed759bc0 100644 --- a/src/corelib/io/qsettings.cpp +++ b/src/corelib/io/qsettings.cpp @@ -52,10 +52,7 @@ #include "qtemporaryfile.h" #include "qstandardpaths.h" #include <qdatastream.h> - -#if QT_CONFIG(textcodec) -# include "qtextcodec.h" -#endif +#include <qstringconverter.h> #ifndef QT_NO_GEOM_VARIANT #include "qsize.h" @@ -230,7 +227,7 @@ void QConfFile::clearCache() // QSettingsPrivate QSettingsPrivate::QSettingsPrivate(QSettings::Format format) - : format(format), scope(QSettings::UserScope /* nothing better to put */), iniCodec(nullptr), fallbacks(true), + : format(format), scope(QSettings::UserScope /* nothing better to put */), fallbacks(true), pendingChanges(false), status(QSettings::NoError) { } @@ -238,7 +235,7 @@ QSettingsPrivate::QSettingsPrivate(QSettings::Format format) QSettingsPrivate::QSettingsPrivate(QSettings::Format format, QSettings::Scope scope, const QString &organization, const QString &application) : format(format), scope(scope), organizationName(organization), applicationName(application), - iniCodec(nullptr), fallbacks(true), pendingChanges(false), status(QSettings::NoError) + fallbacks(true), pendingChanges(false), status(QSettings::NoError) { } @@ -616,16 +613,18 @@ bool QSettingsPrivate::iniUnescapedKey(const QByteArray &key, int from, int to, return lowercaseOnly; } -void QSettingsPrivate::iniEscapedString(const QString &str, QByteArray &result, QTextCodec *codec) +void QSettingsPrivate::iniEscapedString(const QString &str, QByteArray &result) { bool needsQuotes = false; bool escapeNextIfDigit = false; - bool useCodec = codec && !str.startsWith(QLatin1String("@ByteArray(")) + bool useCodec = !str.startsWith(QLatin1String("@ByteArray(")) && !str.startsWith(QLatin1String("@Variant(")); int i; int startPos = result.size(); + QStringEncoder toUtf8(QStringEncoder::Utf8); + result.reserve(startPos + str.size() * 3 / 2); const QChar *unicode = str.unicode(); for (i = 0; i < str.size(); ++i) { @@ -678,11 +677,9 @@ void QSettingsPrivate::iniEscapedString(const QString &str, QByteArray &result, if (ch <= 0x1F || (ch >= 0x7F && !useCodec)) { result += "\\x" + QByteArray::number(ch, 16); escapeNextIfDigit = true; -#if QT_CONFIG(textcodec) } else if (useCodec) { // slow - result += codec->fromUnicode(&unicode[i], 1); -#endif + result += toUtf8(&unicode[i], 1); } else { result += (char)ch; } @@ -705,7 +702,7 @@ inline static void iniChopTrailingSpaces(QString &str, int limit) str.truncate(n--); } -void QSettingsPrivate::iniEscapedStringList(const QStringList &strs, QByteArray &result, QTextCodec *codec) +void QSettingsPrivate::iniEscapedStringList(const QStringList &strs, QByteArray &result) { if (strs.isEmpty()) { /* @@ -721,14 +718,13 @@ void QSettingsPrivate::iniEscapedStringList(const QStringList &strs, QByteArray for (int i = 0; i < strs.size(); ++i) { if (i != 0) result += ", "; - iniEscapedString(strs.at(i), result, codec); + iniEscapedString(strs.at(i), result); } } } bool QSettingsPrivate::iniUnescapedStringList(const QByteArray &str, int from, int to, - QString &stringResult, QStringList &stringListResult, - QTextCodec *codec) + QString &stringResult, QStringList &stringListResult) { static const char escapeCodes[][2] = { @@ -751,6 +747,7 @@ bool QSettingsPrivate::iniUnescapedStringList(const QByteArray &str, int from, i char16_t escapeVal = 0; int i = from; char ch; + QStringDecoder fromUtf8(QStringDecoder::Utf8); StSkipSpaces: while (i < to && ((ch = str.at(i)) == ' ' || ch == '\t')) @@ -830,20 +827,7 @@ StNormal: ++j; } -#if !QT_CONFIG(textcodec) - Q_UNUSED(codec) -#else - if (codec) { - stringResult += codec->toUnicode(str.constData() + i, j - i); - } else -#endif - { - int n = stringResult.size(); - stringResult.resize(n + (j - i)); - QChar *resultData = stringResult.data() + n; - for (int k = i; k < j; ++k) - *resultData++ = QLatin1Char(str.at(k)); - } + stringResult += fromUtf8(str.constData() + i, j - i); i = j; } } @@ -1675,16 +1659,10 @@ bool QConfFileSettingsPrivate::readIniFile(const QByteArray &data, int sectionPosition = 0; bool ok = true; - // detect utf8 BOM + // skip potential utf8 BOM const uchar *dd = (const uchar *)data.constData(); - if (data.size() >= 3 && dd[0] == 0xef && dd[1] == 0xbb && dd[2] == 0xbf) { -#if QT_CONFIG(textcodec) - iniCodec = QTextCodec::codecForName("UTF-8"); -#else - ok = false; -#endif + if (data.size() >= 3 && dd[0] == 0xef && dd[1] == 0xbb && dd[2] == 0xbf) dataPos = 3; - } while (readIniLine(data, dataPos, lineStart, lineLen, equalsPos)) { char ch = data.at(lineStart); @@ -1728,7 +1706,7 @@ bool QConfFileSettingsPrivate::readIniFile(const QByteArray &data, } bool QConfFileSettingsPrivate::readIniSection(const QSettingsKey §ion, const QByteArray &data, - ParsedSettingsMap *settingsMap, QTextCodec *codec) + ParsedSettingsMap *settingsMap) { QStringList strListValue; bool sectionIsLowercase = (section == section.originalCaseKey()); @@ -1761,7 +1739,7 @@ bool QConfFileSettingsPrivate::readIniSection(const QSettingsKey §ion, const QString strValue; strValue.reserve(lineLen - (valueStart - lineStart)); bool isStringList = iniUnescapedStringList(data, valueStart, lineStart + lineLen, - strValue, strListValue, codec); + strValue, strListValue); QVariant variant; if (isStringList) { variant = stringListToVariantList(strListValue); @@ -1894,9 +1872,9 @@ bool QConfFileSettingsPrivate::writeIniFile(QIODevice &device, const ParsedSetti */ if (value.userType() == QMetaType::QStringList || (value.userType() == QMetaType::QVariantList && value.toList().size() != 1)) { - iniEscapedStringList(variantListToStringList(value.toList()), block, iniCodec); + iniEscapedStringList(variantListToStringList(value.toList()), block); } else { - iniEscapedString(variantToString(value), block, iniCodec); + iniEscapedString(variantToString(value), block); } block += eol; if (device.write(block) == -1) { @@ -1914,7 +1892,7 @@ void QConfFileSettingsPrivate::ensureAllSectionsParsed(QConfFile *confFile) cons const UnparsedSettingsMap::const_iterator end = confFile->unparsedIniSections.constEnd(); for (; i != end; ++i) { - if (!QConfFileSettingsPrivate::readIniSection(i.key(), i.value(), &confFile->originalKeys, iniCodec)) + if (!QConfFileSettingsPrivate::readIniSection(i.key(), i.value(), &confFile->originalKeys)) setStatus(QSettings::FormatError); } confFile->unparsedIniSections.clear(); @@ -1942,7 +1920,7 @@ void QConfFileSettingsPrivate::ensureSectionParsed(QConfFile *confFile, return; } - if (!QConfFileSettingsPrivate::readIniSection(i.key(), i.value(), &confFile->originalKeys, iniCodec)) + if (!QConfFileSettingsPrivate::readIniSection(i.key(), i.value(), &confFile->originalKeys)) setStatus(QSettings::FormatError); confFile->unparsedIniSections.erase(i); } @@ -2508,14 +2486,21 @@ void QConfFileSettingsPrivate::ensureSectionParsed(QConfFile *confFile, such as "General/someKey", the key will be located in the "%General" section, \e not in the "General" section. - \li Following the philosophy that we should be liberal in what - we accept and conservative in what we generate, QSettings - will accept Latin-1 encoded INI files, but generate pure - ASCII files, where non-ASCII values are encoded using standard - INI escape sequences. To make the INI files more readable (but - potentially less compatible), call setIniCodec(). + \li In line with most implementations today, QSettings will + assume the INI file is utf-8 encoded. This means that keys and values + will be decoded as utf-8 encoded entries and written back as utf-8. + \endlist + \section2 Compatibility with older Qt versions + + Please note that this behavior is different to how QSettings behaved + in versions of Qt prior to Qt 6. INI files written with Qt 5 or earlier aree + however fully readable by a Qt 6 based application (unless a ini codec + different from utf8 had been set). But INI files written with Qt 6 + will only be readable by older Qt versions if you set the "iniCodec" to + a utf-8 textcodec. + \sa registerFormat(), setPath() */ @@ -2872,61 +2857,6 @@ QString QSettings::applicationName() const return d->applicationName; } -#if QT_CONFIG(textcodec) - -/*! - \since 4.5 - - Sets the codec for accessing INI files (including \c .conf files on Unix) - to \a codec. The codec is used for decoding any data that is read from - the INI file, and for encoding any data that is written to the file. By - default, no codec is used, and non-ASCII characters are encoded using - standard INI escape sequences. - - \warning The codec must be set immediately after creating the QSettings - object, before accessing any data. - - \sa iniCodec() -*/ -void QSettings::setIniCodec(QTextCodec *codec) -{ - Q_D(QSettings); - d->iniCodec = codec; -} - -/*! - \since 4.5 - \overload - - Sets the codec for accessing INI files (including \c .conf files on Unix) - to the QTextCodec for the encoding specified by \a codecName. Common - values for \c codecName include "ISO 8859-1", "UTF-8", and "UTF-16". - If the encoding isn't recognized, nothing happens. - - \sa QTextCodec::codecForName() -*/ -void QSettings::setIniCodec(const char *codecName) -{ - Q_D(QSettings); - if (QTextCodec *codec = QTextCodec::codecForName(codecName)) - d->iniCodec = codec; -} - -/*! - \since 4.5 - - Returns the codec that is used for accessing INI files. By default, - no codec is used, so \nullptr is returned. -*/ - -QTextCodec *QSettings::iniCodec() const -{ - Q_D(const QSettings); - return d->iniCodec; -} - -#endif // textcodec - /*! Returns a status code indicating the first error that was met by QSettings, or QSettings::NoError if no error occurred. |