QTextStream: optimize streaming of QLatin1String and const char*

Instead of converting the QLatin1String to a QString at the first
opportunity, keep it around until it is appended to one of the
internal QStrings in write().

Avoids a memory allocation per QLatin1String / const char* streamed.

Change-Id: Id973a9b743e5a6696defbc4ef4ed2db1ef54e9cc
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/src/corelib/io/qtextstream_p.h b/src/corelib/io/qtextstream_p.h
index c44ae5dada..115408a6dd 100644
--- a/src/corelib/io/qtextstream_p.h
+++ b/src/corelib/io/qtextstream_p.h
@@ -168,15 +168,17 @@ public:
     inline void write(const QString &data) { write(data.begin(), data.length()); }
     inline void write(QChar ch);
     void write(const QChar *data, int len);
+    void write(QLatin1String data);
     inline void putString(const QString &ch, bool number = false) { putString(ch.constData(), ch.length(), number); }
     void putString(const QChar *data, int len, bool number = false);
+    void putString(QLatin1String data, bool number = false);
     inline void putChar(QChar ch);
     void putNumber(qulonglong number, bool negative);
 
     struct PaddingResult {
         enum { PreallocatedPadding = 80 }; // typical line length
 
-        int right, left;
+        int left, right;
         QVarLengthArray<QChar, PreallocatedPadding> padding;
     };
     PaddingResult padding(int len) const;