diff options
| -rw-r--r-- | src/corelib/text/qstring.cpp | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/src/corelib/text/qstring.cpp b/src/corelib/text/qstring.cpp index b6c36e1b2f..e0415d65e0 100644 --- a/src/corelib/text/qstring.cpp +++ b/src/corelib/text/qstring.cpp @@ -3031,6 +3031,22 @@ QString &QString::insert(qsizetype i, QUtf8StringView s) if (Q_UNLIKELY(i > d.size)) difference = i - d.size; + const qsizetype newSize = d.size + difference + insert_size; + + if (d.needsDetach() || needsReallocate(*this, newSize)) { + const auto cbegin = this->cbegin(); + const auto insert_start = difference == 0 ? std::next(cbegin, i) : cend(); + QString other; + other.reserve(newSize); + other.append(QStringView(cbegin, insert_start)); + if (difference > 0) + other.resize(i, u' '); + other.append(s); + other.append(QStringView(insert_start, cend())); + swap(other); + return *this; + } + if (i >= d.size) { d.detachAndGrow(QArrayData::GrowsAtEnd, difference + insert_size, nullptr, nullptr); Q_CHECK_PTR(d.data()); |