QString: add internal qt_compare_strings(QL1S, QSV)

... and adapt qCompareString(QLatin1String, QStringView) to call it
instead of performing the negation itself.

This function will be needed for QLatin1String::startsWith(QStringView).

Change-Id: I8f19dfe0c5274a80c88b43d05f9efda8a91eac46
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
Reviewed-by: Anton Kudryavtsev <antkudr@mail.ru>
Reviewed-by: Lars Knoll <lars.knoll@qt.io>

1 files changed, 6 insertions, 1 deletions

diff --git a/src/corelib/tools/qstring.cpp b/src/corelib/tools/qstring.cpp
index 5d250df99c..caf4ba6573 100644
--- a/src/corelib/tools/qstring.cpp
+++ b/src/corelib/tools/qstring.cpp
@@ -693,6 +693,11 @@ static int qt_compare_strings(QStringView lhs, QLatin1String rhs, Qt::CaseSensit
         return ucstricmp(lhs.begin(), lhs.end(), rhs.begin(), rhs.end());
 }
 
+static int qt_compare_strings(QLatin1String lhs, QStringView rhs, Qt::CaseSensitivity cs) Q_DECL_NOTHROW
+{
+    return -qt_compare_strings(rhs, lhs, cs);
+}
+
 static int qt_compare_strings(QLatin1String lhs, QLatin1String rhs, Qt::CaseSensitivity cs) Q_DECL_NOTHROW
 {
     if (lhs.isEmpty())
@@ -761,7 +766,7 @@ int qCompareStrings(QStringView lhs, QLatin1String rhs, Qt::CaseSensitivity cs)
 */
 int qCompareStrings(QLatin1String lhs, QStringView rhs, Qt::CaseSensitivity cs) Q_DECL_NOTHROW
 {
-    return -qt_compare_strings(rhs, lhs, cs);
+    return qt_compare_strings(lhs, rhs, cs);
 }
 
 /*!