add copy ctor, GetString

stepmania/src/RageFileDriverMemory.cpp

@@ -83,14 +83,23 @@ int RageFileObjMem::GetFileSize() const
 	return m_pFile->m_sBuf.size();
 }
 
+RageFileObjMem::RageFileObjMem( const RageFileObjMem &cpy )
+{
+	m_pFile = cpy.m_pFile;
+	m_iFilePos = cpy.m_iFilePos;
+	RageFileObjMemFile::AddReference( m_pFile );
+}
+
 RageFileObj *RageFileObjMem::Copy() const
 {
-	RageFileObjMem *pRet = new RageFileObjMem( m_pFile );
+	RageFileObjMem *pRet = new RageFileObjMem( *this );
-	pRet->m_iFilePos = m_iFilePos;
-
 	return pRet;
 }
 
+const CString &RageFileObjMem::GetString() const
+{
+	return m_pFile->m_sBuf;
+}
 
 RageFileDriverMem::RageFileDriverMem():
 	RageFileDriver( new NullFilenameDB ),

stepmania/src/RageFileDriverMemory.h

@@ -11,6 +11,7 @@ class RageFileObjMem: public RageFileObj
 {
 public:
 	RageFileObjMem( RageFileObjMemFile *pFile = NULL );
+	RageFileObjMem( const RageFileObjMem &cpy );
 	~RageFileObjMem();
 
 	int ReadInternal( void *buffer, size_t bytes );
@@ -19,6 +20,9 @@ public:
 	int GetFileSize() const;
 	RageFileObj *Copy() const;
 
+	/* Retrieve the contents of this file. */
+	const CString &GetString() const;
+
 private:
 	RageFileObjMemFile *m_pFile;
 	int m_iFilePos;