Resources: reject compressed content we can't decompress

This solution is composed of two features:

1) C++ code generated by RCC uses two symbols exported from QtCore that
are only present if the feature was compiled in. If the feature was not
compiled in, this will cause a linker error either at build time or at
load time (if they were functions, the error could be at runtime).

2) Binary files generated by RCC have a new header field containing
flags. We're currently using two flags, one for Zlib and one for
Zstandard.

This means we now have binary RCC format version 3.

Change-Id: I42a48bd64ccc41aebf84fffd156545fb6a4f72d9
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io>
Reviewed-by: Lars Knoll <lars.knoll@qt.io>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/tools/rcc/rcc.h b/src/tools/rcc/rcc.h
index 7603a41cde..ad1c5cd166 100644
--- a/src/tools/rcc/rcc.h
+++ b/src/tools/rcc/rcc.h
@@ -134,6 +134,7 @@ private:
     bool writeInitializer();
     void writeMangleNamespaceFunction(const QByteArray &name);
     void writeAddNamespaceFunction(const QByteArray &name);
+    void writeDecimal(int value);
     void writeHex(quint8 number);
     void writeNumber2(quint16 number);
     void writeNumber4(quint32 number);
@@ -160,6 +161,7 @@ private:
     int m_treeOffset;
     int m_namesOffset;
     int m_dataOffset;
+    quint32 m_overallFlags;
     bool m_useNameSpace;
     QStringList m_failedResources;
     QIODevice *m_errorDevice;