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qDecodeDataUrl: use QBAV more

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to reduce allocations

Change-Id: Ia2d68186ee56556152254c6579a52131b246b07f
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
This commit is contained in:
Anton Kudryavtsev 2023-08-28 18:42:07 +03:00
parent 28aee90093
commit 9f7c794626
1 changed files with 7 additions and 5 deletions
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12
src/corelib/io/qdataurl.cpp
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@ -26,12 +26,14 @@ Q_CORE_EXPORT bool qDecodeDataUrl(const QUrl &uri, QString &mimeType, QByteArray
// reality often differs from the specification. People have
// data: URIs with ? and #
//QByteArray data = QByteArray::fromPercentEncoding(uri.path(QUrl::FullyEncoded).toLatin1());
QByteArray data = QByteArray::fromPercentEncoding(uri.url(QUrl::FullyEncoded | QUrl::RemoveScheme).toLatin1());
const QByteArray dataArray =
QByteArray::fromPercentEncoding(uri.url(QUrl::FullyEncoded | QUrl::RemoveScheme).toLatin1());
QByteArrayView data = dataArray;
// parse it:
const qsizetype pos = data.indexOf(',');
if (pos != -1) {
payload = data.mid(pos + 1);
payload = data.mid(pos + 1).toByteArray();
data.truncate(pos);
data = data.trimmed();
@ -41,17 +43,17 @@ Q_CORE_EXPORT bool qDecodeDataUrl(const QUrl &uri, QString &mimeType, QByteArray
data.chop(7);
}
QByteArrayView textPlain;
if (QLatin1StringView{data}.startsWith("charset"_L1, Qt::CaseInsensitive)) {
qsizetype i = 7; // strlen("charset")
while (data.at(i) == ' ')
++i;
if (data.at(i) == '=')
data.prepend("text/plain;");
textPlain = "text/plain;";
}
if (!data.isEmpty())
mimeType = QString::fromLatin1(data.trimmed());
mimeType = QString::fromLatin1(textPlain + data.trimmed());
}
return true;