split out FilenameDB::DelFileSet

stepmania/src/RageUtil_FileDB.cpp

@@ -324,15 +324,15 @@ void FilenameDB::AddFile( const CString &sPath, int size, int hash, void *priv )
 	} while( begin != end );
 }
 
-void FilenameDB::DelFile( const CString &sPath )
+/* Remove the given FileSet, and all dirp pointers to it.  This means the cache has
+ * expired, not that the directory is necessarily gone; don't actually delete the file
+ * from the parent. */
+void FilenameDB::DelFileSet( map<CString, FileSet *>::iterator dir )
 {
-	CString lower = sPath;
-	lower.MakeLower();
+	if( dir == dirs.end() )
+		return;
 
-	map<CString, FileSet *>::iterator fsi = dirs.find( lower );
-	if( fsi != dirs.end() )
-	{
-		FileSet *fs = fsi->second;
+	FileSet *fs = dir->second;
 
 	/* Remove any stale dirp pointers. */
 	for( map<CString, FileSet *>::iterator it = dirs.begin(); it != dirs.end(); ++it )
@@ -347,9 +347,17 @@ void FilenameDB::DelFile( const CString &sPath )
 	}
 
 	delete fs;
-		dirs.erase( fsi );
+	dirs.erase( dir );
 }
 
+void FilenameDB::DelFile( const CString &sPath )
+{
+	CString lower = sPath;
+	lower.MakeLower();
+
+	map<CString, FileSet *>::iterator fsi = dirs.find( lower );
+	DelFileSet( fsi );
+
 	/* Delete sPath from its parent. */
 	CString Dir, Name;
 	SplitPath(sPath, Dir, Name);

stepmania/src/RageUtil_FileDB.h

@@ -81,6 +81,7 @@ protected:
 		const CString &beginning, const CString &containing, const CString &ending, 
 		vector<CString> &out, bool bOnlyDirs);
 	void AddFileSet( CString sPath, FileSet *fs );
+	void DelFileSet( map<CString, FileSet *>::iterator dir );
 
 	/* The given path wasn't cached.  Cache it. */
 	virtual void PopulateFileSet( FileSet &fs, const CString &sPath ) { }