fix clang format and clear flag for read process out\err

libs/main/system/piprocess.h

@@ -99,18 +99,11 @@ public:
 
 	//! \~english Returns all attached execution output stream
 	//! \~russian
-	PIByteArray readOutput() {
-		f_out.open(PIIODevice::ReadOnly);
-		return f_out.readAll();
-	}
+	PIByteArray readOutput(bool clear = false);
 
 	//! \~english Returns all attached execution error stream
 	//! \~russian
-	PIByteArray readError() {
-		f_err.open(PIIODevice::ReadOnly);
-		return f_err.readAll();
-	}
-
+	PIByteArray readError(bool clear = false);
 
 	//! \~english Returns current attached execution environment
 	//! \~russian
@@ -227,6 +220,7 @@ private:
 	void run() override;
 	void exec_();
 	void startProc(bool detached);
+	PIByteArray readFile(PIFile & f, bool clear);
 
 	PRIVATE_DECLARATION(PIP_EXPORT)
 	PIStringList args, env;