diff options
Diffstat (limited to 'src/corelib/tools/qregularexpression.cpp')
| -rw-r--r-- | src/corelib/tools/qregularexpression.cpp | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/src/corelib/tools/qregularexpression.cpp b/src/corelib/tools/qregularexpression.cpp index 27264f7e72..393b2bbb7d 100644 --- a/src/corelib/tools/qregularexpression.cpp +++ b/src/corelib/tools/qregularexpression.cpp @@ -288,7 +288,7 @@ QT_BEGIN_NAMESPACE Partial matching is mainly useful in two scenarios: validating user input in real time and incremental/multi-segment matching. - \target + \target validating user input \section2 Validating user input Suppose that we would like the user to input a date in a specific @@ -796,6 +796,7 @@ struct QRegularExpressionPrivate : QSharedData int offset, QRegularExpression::MatchType matchType, QRegularExpression::MatchOptions matchOptions, + bool checkSubjectString = true, const QRegularExpressionMatchPrivate *previous = 0) const; int captureIndexForName(const QString &name) const; @@ -1165,7 +1166,8 @@ static int pcre16SafeExec(const pcre16 *code, const pcre16_extra *extra, Performs a match of type \a matchType on the given \a subject string with options \a matchOptions and returns the QRegularExpressionMatchPrivate of the result. It also advances a match if a previous result is given as \a - previous. + previous. The \a subject string goes a Unicode validity check if + \a checkSubjectString is true (PCRE doesn't like illegal UTF-16 sequences). Advancing a match is a tricky algorithm. If the previous match matched a non-empty string, we just do an ordinary match at the offset position. @@ -1182,6 +1184,7 @@ QRegularExpressionMatchPrivate *QRegularExpressionPrivate::doMatch(const QString int offset, QRegularExpression::MatchType matchType, QRegularExpression::MatchOptions matchOptions, + bool checkSubjectString, const QRegularExpressionMatchPrivate *previous) const { if (offset < 0) @@ -1211,6 +1214,9 @@ QRegularExpressionMatchPrivate *QRegularExpressionPrivate::doMatch(const QString else if (matchType == QRegularExpression::PartialPreferFirstMatch) pcreOptions |= PCRE_PARTIAL_HARD; + if (!checkSubjectString) + pcreOptions |= PCRE_NO_UTF16_CHECK; + bool previousMatchWasEmpty = false; if (previous && previous->hasMatch && (previous->capturedOffsets.at(0) == previous->capturedOffsets.at(1))) { @@ -1318,10 +1324,15 @@ QRegularExpressionMatch QRegularExpressionMatchPrivate::nextMatch() const Q_ASSERT(isValid); Q_ASSERT(hasMatch || hasPartialMatch); + // Note the "false" passed for the check of the subject string: + // if we're advancing a match on the same subject, + // then that subject was already checked at least once (when this object + // was created, or when the object that created this one was created, etc.) QRegularExpressionMatchPrivate *nextPrivate = regularExpression.d->doMatch(subject, capturedOffsets.at(1), matchType, matchOptions, + false, this); return QRegularExpressionMatch(*nextPrivate); } |