| //===-- MIUtilStreamStdin.h -------------------------------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| //++ |
| // File: MIUtilStreamStdin.h |
| // |
| // Overview: CMICmnStreamStdin interface. |
| // |
| // Environment: Compilers: Visual C++ 12. |
| // gcc (Ubuntu/Linaro 4.8.1-10ubuntu9) 4.8.1 |
| // Libraries: See MIReadmetxt. |
| // |
| // Copyright: None. |
| //-- |
| |
| #pragma once |
| |
| // In-house headers: |
| #include "MIUtilString.h" |
| #include "MIUtilThreadBaseStd.h" |
| #include "MICmnBase.h" |
| #include "MIUtilSingletonBase.h" |
| |
| //++ ============================================================================ |
| // Details: MI common code class. Used to handle stream data from Stdin. |
| // Singleton class using the Visitor pattern. A driver using the interface |
| // provide can receive callbacks when a new line of data is received. |
| // Each line is determined by a carriage return. |
| // A singleton class. |
| // Gotchas: None. |
| // Authors: Illya Rudkin 10/02/2014. |
| // Changes: Factored out OS specific handling of reading stdin - IOR 16/06/2014. |
| //-- |
| class CMICmnStreamStdin |
| : public CMICmnBase |
| , public CMIUtilThreadActiveObjBase |
| , public MI::ISingleton< CMICmnStreamStdin > |
| { |
| // Give singleton access to private constructors |
| friend MI::ISingleton< CMICmnStreamStdin >; |
| |
| // Class: |
| public: |
| //++ |
| // Description: Visitor pattern. Driver(s) use this interface to get a callback |
| // on each new line of data received from stdin. |
| //-- |
| class IStreamStdin |
| { |
| public: |
| virtual bool ReadLine( const CMIUtilString & vStdInBuffer, bool & vrwbYesExit ) = 0; |
| |
| /* dtor */ virtual ~IStreamStdin( void ) {}; |
| }; |
| |
| //++ |
| // Description: Specific OS stdin handling implementations are created and used by *this |
| // class. Seperates out functionality and enables handler to be set |
| // dynamically depended on the OS detected. |
| //-- |
| class IOSStdinHandler |
| { |
| public: |
| virtual bool InputAvailable( bool & vwbAvail ) = 0; |
| virtual const MIchar * ReadLine( CMIUtilString & vwErrMsg ) = 0; |
| |
| /* dtor */ virtual ~IOSStdinHandler( void ) {}; |
| }; |
| |
| // Methods: |
| public: |
| bool Initialize( void ); |
| bool Shutdown( void ); |
| // |
| const CMIUtilString & GetPrompt( void ) const; |
| bool SetPrompt( const CMIUtilString & vNewPrompt ); |
| void SetEnablePrompt( const bool vbYes ); |
| bool GetEnablePrompt( void ) const; |
| void SetCtrlCHit( void ); |
| bool SetVisitor( IStreamStdin & vrVisitor ); |
| bool SetOSStdinHandler( IOSStdinHandler & vrHandler ); |
| |
| // Overridden: |
| public: |
| // From CMIUtilThreadActiveObjBase |
| virtual const CMIUtilString & ThreadGetName( void ) const; |
| |
| // Overridden: |
| protected: |
| // From CMIUtilThreadActiveObjBase |
| virtual bool ThreadRun( bool & vrIsAlive ); |
| virtual bool ThreadFinish( void ); // Let this thread clean up after itself |
| |
| // Methods: |
| private: |
| /* ctor */ CMICmnStreamStdin( void ); |
| /* ctor */ CMICmnStreamStdin( const CMICmnStreamStdin & ); |
| void operator=( const CMICmnStreamStdin & ); |
| |
| bool MonitorStdin( bool & vrwbYesExit ); |
| const MIchar * ReadLine( CMIUtilString & vwErrMsg ); |
| bool InputAvailable( bool & vbAvail ); // Bytes are available on stdin |
| |
| // Overridden: |
| private: |
| // From CMICmnBase |
| /* dtor */ virtual ~CMICmnStreamStdin( void ); |
| |
| // Attributes: |
| private: |
| const CMIUtilString m_constStrThisThreadname; |
| IStreamStdin * m_pVisitor; |
| CMIUtilString m_strPromptCurrent; // Command line prompt as shown to the user |
| volatile bool m_bKeyCtrlCHit; // True = User hit Ctrl-C, false = has not yet |
| bool m_bShowPrompt; // True = Yes prompt is shown/output to the user (stdout), false = no prompt |
| bool m_bRedrawPrompt; // True = Prompt needs to be redrawn |
| IOSStdinHandler * m_pStdinReadHandler; |
| }; |
| |