Merge pull request #7152 from rouault/fix_memleaks_qgsstyle

Fix various memleaks in QgsStyle

Author: rouault

python/core/auto_generated/symbology/qgsstyle.sip.in

@@ -134,6 +134,7 @@ returns 0 if not found
 Returns default application-wide style
 %End
 
+
     bool tagSymbol( StyleEntity type, const QString &symbol, const QStringList &tags );
 %Docstring
 Tags the symbol with the tags in the list
@@ -453,56 +454,10 @@ Is emitted every time a new symbol has been added to the database
     void groupsModified();
 %Docstring
 Is emitted every time a tag or smartgroup has been added, removed, or renamed
-%End
-
-  protected:
-
-
-
-
-
-    bool openDatabase( const QString &filename );
-%Docstring
-Convenience function to open the DB and return a sqlite3 object
-%End
-
-    bool runEmptyQuery( char *query, bool freeQuery = true );
-%Docstring
-Convenience function that would run queries which don't generate return values
-
-:param query: query to run
-:param freeQuery: release query memory
-
-:return: success true on success
-%End
-
-    int getId( const QString &table, const QString &name );
-%Docstring
-Gets the id from the table for the given name from the database, 0 if not found
-%End
-
-    QString getName( const QString &table, int id ) const;
-%Docstring
-Gets the name from the table for the given id from the database, empty if not found
-%End
-
-    bool updateSymbol( StyleEntity type, const QString &name );
-%Docstring
-Updates the properties of an existing symbol/colorramp
-
-.. note::
-
-   This should not be called separately, only called through addSymbol or addColorRamp
-
-:param type: is either SymbolEntity or ColorrampEntity
-:param name: is the name of an existing symbol or a color ramp
-
-:return: Success state of the update operation
 %End
 
 };
 
-
 /************************************************************************
  * This file has been generated automatically from                      *
  *                                                                      *

src/core/qgsapplication.cpp

@@ -47,6 +47,7 @@
 #include "qgs3drendererregistry.h"
 #include "qgslayoutrendercontext.h"
 #include "qgssqliteutils.h"
+#include "qgsstyle.h"
 
 #include "gps/qgsgpsconnectionregistry.h"
 #include "processing/qgsprocessingregistry.h"
@@ -1089,6 +1090,8 @@ void QgsApplication::exitQgis()
   // is destroyed before the static variables of the cache, we might use freed memory.
   QgsCoordinateTransform::invalidateCache();
 
+  QgsStyle::cleanDefaultStyle();
+
   // tear-down GDAL/OGR
   OGRCleanupAll();
   GDALDestroyDriverManager();

src/core/qgssqliteutils.cpp

@@ -18,6 +18,7 @@
 #include "qgssqliteutils.h"
 
 #include <sqlite3.h>
+#include <stdarg.h>
 
 void QgsSqlite3Closer::operator()( sqlite3 *database )
 {
@@ -89,3 +90,14 @@ sqlite3_statement_unique_ptr sqlite3_database_unique_ptr::prepare( const QString
   s.reset( preparedStatement );
   return s;
 }
+
+QString QgsSqlite3Mprintf( const char *format, ... )
+{
+  va_list ap;
+  va_start( ap, format );
+  char *c_str = sqlite3_vmprintf( format, ap );
+  va_end( ap );
+  QString res( QString::fromUtf8( c_str ) );
+  sqlite3_free( c_str );
+  return res;
+}

src/core/qgssqliteutils.h

@@ -135,7 +135,15 @@ class CORE_EXPORT sqlite3_database_unique_ptr : public std::unique_ptr< sqlite3,
      * argument will be filled with the sqlite3 result code.
      */
     sqlite3_statement_unique_ptr prepare( const QString &sql, int &resultCode ) const;
-
 };
 
+
+/**
+ * Wraps sqlite3_mprintf() by automatically freeing the memory.
+ * \note not available in Python bindings.
+ * \since QGIS 3.2
+ */
+QString CORE_EXPORT QgsSqlite3Mprintf( const char *format, ... );
+
+
 #endif // QGSSQLITEUTILS_H