2 files changed, 13 insertions, 2 deletions
diff --git a/src/corelib/tools/qlocale_tools.cpp b/src/corelib/tools/qlocale_tools.cpp
index a6a699fa16..5fd2aa0c59 100644
--- a/src/corelib/tools/qlocale_tools.cpp
+++ b/src/corelib/tools/qlocale_tools.cpp
@@ -535,10 +535,20 @@ QString &exponentForm(QChar zero, QChar decimal, QChar exponential,
 
 double qstrtod(const char *s00, const char **se, bool *ok)
 {
+    const int len = static_cast<int>(strlen(s00));
+    Q_ASSERT(len >= 0);
+    return qstrntod(s00, len, se, ok);
+}
+
+/*!
+  \internal
+
+  Converts the initial portion of the string pointed to by \a s00 to a double, using the 'C' locale.
+ */
+double qstrntod(const char *s00, int len, const char **se, bool *ok)
+{
     int processed = 0;
     bool nonNullOk = false;
-    int len = static_cast<int>(strlen(s00));
-    Q_ASSERT(len >= 0);
     double d = asciiToDouble(s00, len, nonNullOk, processed, TrailingJunkAllowed);
     if (se)
         *se = s00 + processed;
diff --git a/src/corelib/tools/qlocale_tools_p.h b/src/corelib/tools/qlocale_tools_p.h
index b09ab564bb..6133f67add 100644
--- a/src/corelib/tools/qlocale_tools_p.h
+++ b/src/corelib/tools/qlocale_tools_p.h
@@ -115,6 +115,7 @@ inline bool isZero(double d)
 }
 
 Q_CORE_EXPORT double qstrtod(const char *s00, char const **se, bool *ok);
+Q_CORE_EXPORT double qstrntod(const char *s00, int len, char const **se, bool *ok);
 qlonglong qstrtoll(const char *nptr, const char **endptr, int base, bool *ok);
 qulonglong qstrtoull(const char *nptr, const char **endptr, int base, bool *ok);