QTextDocument: avoid relocations

Hand-roll a string table here, since there's opportunity for
sharing string data between string entries.

Effects on Linux AMD64 GCC 4.9-trunk release stripped:
  text:   -88B
  data:   -64B
  relocs:  -5

Maintainability is hurt somewhat, but it is expected that the
contents of this string table do not change much, so the
overall effect is still very low.

Change-Id: I2a22da4c8548c53ef31c33319b4652f3cb6f62f5
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>

1 files changed, 11 insertions, 3 deletions

diff --git a/src/gui/text/qtextdocument.cpp b/src/gui/text/qtextdocument.cpp
index 82d63237e7..fa54776b6d 100644
--- a/src/gui/text/qtextdocument.cpp
+++ b/src/gui/text/qtextdocument.cpp
@@ -2160,13 +2160,21 @@ bool QTextHtmlExporter::emitCharFormatStyle(const QTextCharFormat &format)
         html += QLatin1String("pt;");
         attributesEmitted = true;
     } else if (format.hasProperty(QTextFormat::FontSizeAdjustment)) {
-        static const char * const sizeNames[] = {
-            "small", "medium", "large", "x-large", "xx-large"
+        static const char sizeNameData[] =
+            "small" "\0"
+            "medium" "\0"
+            "xx-large" ;
+        static const quint8 sizeNameOffsets[] = {
+            0,                                         // "small"
+            sizeof("small"),                           // "medium"
+            sizeof("small") + sizeof("medium") + 3,    // "large"    )
+            sizeof("small") + sizeof("medium") + 1,    // "x-large"  )> compressed into "xx-large"
+            sizeof("small") + sizeof("medium"),        // "xx-large" )
         };
         const char *name = 0;
         const int idx = format.intProperty(QTextFormat::FontSizeAdjustment) + 1;
         if (idx >= 0 && idx <= 4) {
-            name = sizeNames[idx];
+            name = sizeNameData + sizeNameOffsets[idx];
         }
         if (name) {
             html += QLatin1String(" font-size:");