Refactor QTestCharBuffer a bit

Use a static buffer for small strings, and making it oom safe.
We can now see messages up to 512 bytes even if we run out of memory
(important for OOM tests). Also, testlogging (< 512 bytes per line)
should again work without a single allocation.

Reviewed-By: Rohan McGovern <rohan.mcgovern@nokia.com>

1 files changed, 30 insertions, 31 deletions

diff --git a/src/testlib/qtestxmlstreamer.cpp b/src/testlib/qtestxmlstreamer.cpp
index 1b6e674e8f..c72d6480f5 100644
--- a/src/testlib/qtestxmlstreamer.cpp
+++ b/src/testlib/qtestxmlstreamer.cpp
@@ -60,7 +60,7 @@ QTestXmlStreamer::QTestXmlStreamer()
 QTestXmlStreamer::~QTestXmlStreamer()
 {}
 
-void QTestXmlStreamer::formatStart(const QTestElement *element, char **formatted) const
+void QTestXmlStreamer::formatStart(const QTestElement *element, QTestCharBuffer *formatted) const
 {
     if(!element || !formatted)
         return;
@@ -68,20 +68,20 @@ void QTestXmlStreamer::formatStart(const QTestElement *element, char **formatted
     switch(element->elementType()){
     case QTest::LET_TestCase: {
         QTestCharBuffer quotedTf;
-        QXmlTestLogger::xmlQuote(quotedTf, element->attributeValue(QTest::AI_Name));
+        QXmlTestLogger::xmlQuote(&quotedTf, element->attributeValue(QTest::AI_Name));
 
         QTest::qt_asprintf(formatted, "<TestFunction name=\"%s\">\n", quotedTf.constData());
         break;
     }
     case QTest::LET_Failure: {
         QTestCharBuffer cdataDesc;
-        QXmlTestLogger::xmlCdata(cdataDesc, element->attributeValue(QTest::AI_Description));
+        QXmlTestLogger::xmlCdata(&cdataDesc, element->attributeValue(QTest::AI_Description));
 
         QTestCharBuffer location;
         QTestCharBuffer quotedFile;
-        QXmlTestLogger::xmlQuote(quotedFile, element->attributeValue(QTest::AI_File));
+        QXmlTestLogger::xmlQuote(&quotedFile, element->attributeValue(QTest::AI_File));
 
-        QTest::qt_asprintf(location, "%s=\"%s\" %s=\"%s\"",
+        QTest::qt_asprintf(&location, "%s=\"%s\" %s=\"%s\"",
                            element->attributeName(QTest::AI_File),
                            quotedFile.constData(),
                            element->attributeName(QTest::AI_Line),
@@ -89,7 +89,7 @@ void QTestXmlStreamer::formatStart(const QTestElement *element, char **formatted
 
         if (element->attribute(QTest::AI_Tag)) {
             QTestCharBuffer cdataTag;
-            QXmlTestLogger::xmlCdata(cdataTag, element->attributeValue(QTest::AI_Tag));
+            QXmlTestLogger::xmlCdata(&cdataTag, element->attributeValue(QTest::AI_Tag));
             QTest::qt_asprintf(formatted, "<Incident type=\"%s\" %s>\n"
                 "    <DataTag><![CDATA[%s]]></DataTag>\n"
                 "    <Description><![CDATA[%s]]></Description>\n"
@@ -108,8 +108,8 @@ void QTestXmlStreamer::formatStart(const QTestElement *element, char **formatted
         // assuming type and attribute names don't need quoting
         QTestCharBuffer quotedFile;
         QTestCharBuffer cdataDesc;
-        QXmlTestLogger::xmlQuote(quotedFile, element->attributeValue(QTest::AI_File));
-        QXmlTestLogger::xmlCdata(cdataDesc, element->attributeValue(QTest::AI_Description));
+        QXmlTestLogger::xmlQuote(&quotedFile, element->attributeValue(QTest::AI_File));
+        QXmlTestLogger::xmlCdata(&cdataDesc, element->attributeValue(QTest::AI_Description));
 
         QTest::qt_asprintf(formatted, "<Message type=\"%s\" %s=\"%s\" %s=\"%s\">\n    <Description><![CDATA[%s]]></Description>\n</Message>\n",
                            element->attributeValue(QTest::AI_Type),
@@ -124,8 +124,8 @@ void QTestXmlStreamer::formatStart(const QTestElement *element, char **formatted
         // assuming value and iterations don't need quoting
         QTestCharBuffer quotedMetric;
         QTestCharBuffer quotedTag;
-        QXmlTestLogger::xmlQuote(quotedMetric, element->attributeValue(QTest::AI_Metric));
-        QXmlTestLogger::xmlQuote(quotedTag, element->attributeValue(QTest::AI_Tag));
+        QXmlTestLogger::xmlQuote(&quotedMetric, element->attributeValue(QTest::AI_Metric));
+        QXmlTestLogger::xmlQuote(&quotedTag, element->attributeValue(QTest::AI_Tag));
 
         QTest::qt_asprintf(formatted, "<BenchmarkResult %s=\"%s\" %s=\"%s\" %s=\"%s\" %s=\"%s\" />\n",
                            element->attributeName(QTest::AI_Metric),
@@ -139,23 +139,23 @@ void QTestXmlStreamer::formatStart(const QTestElement *element, char **formatted
         break;
     }
     default:
-        QTest::qt_asprintf(formatted, "");
+        formatted->data()[0] = '\0';
     }
 }
 
-void QTestXmlStreamer::formatEnd(const QTestElement *element, char **formatted) const
+void QTestXmlStreamer::formatEnd(const QTestElement *element, QTestCharBuffer *formatted) const
 {
     if(!element || !formatted)
         return;
 
     if (element->elementType() == QTest::LET_TestCase) {
         QTest::qt_asprintf(formatted, "</TestFunction>\n");
+    } else {
+        formatted->data()[0] = '\0';
     }
-    else
-        QTest::qt_asprintf(formatted, "");
 }
 
-void QTestXmlStreamer::formatBeforeAttributes(const QTestElement *element, char **formatted) const
+void QTestXmlStreamer::formatBeforeAttributes(const QTestElement *element, QTestCharBuffer *formatted) const
 {
     if(!element || !formatted)
         return;
@@ -163,9 +163,9 @@ void QTestXmlStreamer::formatBeforeAttributes(const QTestElement *element, char
     if (element->elementType() == QTest::LET_TestCase && element->attribute(QTest::AI_Result)){
         QTestCharBuffer buf;
         QTestCharBuffer quotedFile;
-        QXmlTestLogger::xmlQuote(quotedFile, element->attributeValue(QTest::AI_File));
+        QXmlTestLogger::xmlQuote(&quotedFile, element->attributeValue(QTest::AI_File));
 
-        QTest::qt_asprintf(buf, "%s=\"%s\" %s=\"%s\"",
+        QTest::qt_asprintf(&buf, "%s=\"%s\" %s=\"%s\"",
                            element->attributeName(QTest::AI_File),
                            quotedFile.constData(),
                            element->attributeName(QTest::AI_Line),
@@ -174,12 +174,11 @@ void QTestXmlStreamer::formatBeforeAttributes(const QTestElement *element, char
         if( !element->childElements() ) {
             QTest::qt_asprintf(formatted, "<Incident type=\"%s\" %s/>\n",
                                element->attributeValue(QTest::AI_Result), buf.constData());
+        } else {
+            formatted->data()[0] = '\0';
         }
-        else {
-            QTest::qt_asprintf(formatted, "");
-        }
-    }else{
-        QTest::qt_asprintf(formatted, "");
+    } else {
+        formatted->data()[0] = '\0';
     }
 }
 
@@ -187,23 +186,23 @@ void QTestXmlStreamer::output(QTestElement *element) const
 {
     QTestCharBuffer buf;
     QTestCharBuffer quotedTc;
-    QXmlTestLogger::xmlQuote(quotedTc, QTestResult::currentTestObjectName());
+    QXmlTestLogger::xmlQuote(&quotedTc, QTestResult::currentTestObjectName());
 
-    QTest::qt_asprintf(buf, "<?xml version=\"1.0\" encoding=\"ISO-8859-1\"?>\n<TestCase name=\"%s\">\n",
+    QTest::qt_asprintf(&buf, "<?xml version=\"1.0\" encoding=\"ISO-8859-1\"?>\n<TestCase name=\"%s\">\n",
                        quotedTc.constData());
-    outputString(buf);
+    outputString(buf.constData());
 
-    QTest::qt_asprintf(buf, "<Environment>\n    <QtVersion>%s</QtVersion>\n    <QTestVersion>%s</QTestVersion>\n",
+    QTest::qt_asprintf(&buf, "<Environment>\n    <QtVersion>%s</QtVersion>\n    <QTestVersion>%s</QTestVersion>\n",
                        qVersion(), QTEST_VERSION_STR );
-    outputString(buf);
+    outputString(buf.constData());
 
-    QTest::qt_asprintf(buf, "</Environment>\n");
-    outputString(buf);
+    QTest::qt_asprintf(&buf, "</Environment>\n");
+    outputString(buf.constData());
 
     QTestBasicStreamer::output(element);
 
-    QTest::qt_asprintf(buf, "</TestCase>\n");
-    outputString(buf);
+    QTest::qt_asprintf(&buf, "</TestCase>\n");
+    outputString(buf.constData());
 }
 
 QT_END_NAMESPACE