| //===-- MICmnStreamStdinWindows.cpp -----------------------------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| //++ |
| // File: MIUtilStreamStdin.cpp |
| // |
| // Overview: CMICmnStreamStdinWindows implementation. |
| // |
| // Environment: Compilers: Visual C++ 12. |
| // gcc (Ubuntu/Linaro 4.8.1-10ubuntu9) 4.8.1 |
| // Libraries: See MIReadmetxt. |
| // |
| // Copyright: None. |
| //-- |
| |
| // Third Party Headers: |
| #if defined( _MSC_VER ) |
| #include <stdio.h> |
| #include <Windows.h> |
| #include <io.h> |
| #include <conio.h> |
| #endif // defined( _MSC_VER ) |
| #include <string.h> |
| |
| // In-house headers: |
| #include "MICmnStreamStdinWindows.h" |
| #include "MICmnLog.h" |
| #include "MICmnResources.h" |
| #include "MIUtilSystemWindows.h" |
| #include "MIUtilSingletonHelper.h" |
| |
| //++ ------------------------------------------------------------------------------------ |
| // Details: CMICmnStreamStdinWindows constructor. |
| // Type: Method. |
| // Args: None. |
| // Return: None. |
| // Throws: None. |
| //-- |
| CMICmnStreamStdinWindows::CMICmnStreamStdinWindows( void ) |
| : m_constBufferSize( 1024 ) |
| , m_pStdin( nullptr ) |
| , m_pCmdBuffer( nullptr ) |
| , m_pStdinBuffer( nullptr ) |
| , m_nBytesToBeRead( 0 ) |
| , m_bRunningInConsoleWin( false ) |
| { |
| } |
| |
| //++ ------------------------------------------------------------------------------------ |
| // Details: CMICmnStreamStdinWindows destructor. |
| // Type: Overridable. |
| // Args: None. |
| // Return: None. |
| // Throws: None. |
| //-- |
| CMICmnStreamStdinWindows::~CMICmnStreamStdinWindows( void ) |
| { |
| Shutdown(); |
| } |
| |
| //++ ------------------------------------------------------------------------------------ |
| // Details: Initialize resources for *this Stdin stream. |
| // Type: Method. |
| // Args: None. |
| // Return: MIstatus::success - Functional succeeded. |
| // MIstatus::failure - Functional failed. |
| // Throws: None. |
| //-- |
| bool CMICmnStreamStdinWindows::Initialize( void ) |
| { |
| if( m_bInitialized ) |
| return MIstatus::success; |
| |
| bool bOk = MIstatus::success; |
| CMIUtilString errMsg; |
| |
| // Note initialisation order is important here as some resources depend on previous |
| MI::ModuleInit< CMICmnLog > ( IDS_MI_INIT_ERR_LOG , bOk, errMsg ); |
| MI::ModuleInit< CMICmnResources >( IDS_MI_INIT_ERR_RESOURCES, bOk, errMsg ); |
| |
| // Other resources required |
| if( bOk ) |
| { |
| m_pCmdBuffer = new MIchar[ m_constBufferSize ]; |
| m_pStdin = stdin; |
| |
| #if MICONFIG_CREATE_OWN_STDIN_BUFFER |
| // Give stdinput a user defined buffer |
| m_pStdinBuffer = new char[ 1024 ]; |
| ::setbuf( stdin, m_pStdinBuffer ); |
| #endif // MICONFIG_CREATE_OWN_STDIN_BUFFER |
| |
| // Clear error indicators for std input |
| ::clearerr( stdin ); |
| } |
| |
| if( bOk ) |
| { |
| #if defined( _MSC_VER ) |
| m_bRunningInConsoleWin = ::_isatty( ::fileno( stdin ) ); |
| #endif // #if defined( _MSC_VER ) |
| } |
| |
| m_bInitialized = bOk; |
| |
| if( !bOk ) |
| { |
| CMIUtilString strInitError( CMIUtilString::Format( MIRSRC( IDS_MI_INIT_ERR_OS_STDIN_HANDLER ), errMsg.c_str() ) ); |
| SetErrorDescription( strInitError ); |
| return MIstatus::failure; |
| } |
| |
| return MIstatus::success; |
| } |
| |
| //++ ------------------------------------------------------------------------------------ |
| // Details: Release resources for *this Stdin stream. |
| // Type: Method. |
| // Args: None. |
| // Return: MIstatus::success - Functional succeeded. |
| // MIstatus::failure - Functional failed. |
| // Throws: None. |
| //-- |
| bool CMICmnStreamStdinWindows::Shutdown( void ) |
| { |
| if( !m_bInitialized ) |
| return MIstatus::success; |
| |
| m_bInitialized = false; |
| |
| ClrErrorDescription(); |
| |
| bool bOk = MIstatus::success; |
| CMIUtilString errMsg; |
| |
| // Tidy up |
| if( m_pCmdBuffer != nullptr ) |
| { |
| delete [] m_pCmdBuffer; |
| m_pCmdBuffer = nullptr; |
| } |
| m_pStdin = nullptr; |
| |
| #if MICONFIG_CREATE_OWN_STDIN_BUFFER |
| if ( m_pStdinBuffer ) |
| delete [] m_pStdinBuffer; |
| m_pStdinBuffer = nullptr; |
| #endif // MICONFIG_CREATE_OWN_STDIN_BUFFER |
| |
| // Note shutdown order is important here |
| MI::ModuleShutdown< CMICmnResources >( IDS_MI_INIT_ERR_RESOURCES, bOk, errMsg ); |
| MI::ModuleShutdown< CMICmnLog > ( IDS_MI_INIT_ERR_LOG , bOk, errMsg ); |
| |
| if( !bOk ) |
| { |
| SetErrorDescriptionn( MIRSRC( IDS_MI_SHTDWN_ERR_OS_STDIN_HANDLER ), errMsg.c_str() ); |
| } |
| |
| return MIstatus::success; |
| } |
| |
| //++ ------------------------------------------------------------------------------------ |
| // Details: Determine if stdin has any characters present in its buffer. |
| // Type: Method. |
| // Args: vwbAvail - (W) True = There is chars available, false = nothing there. |
| // Return: MIstatus::success - Functional succeeded. |
| // MIstatus::failure - Functional failed. |
| // Throws: None. |
| //-- |
| bool CMICmnStreamStdinWindows::InputAvailable( bool & vwbAvail ) |
| { |
| #ifdef _MSC_VER |
| return m_bRunningInConsoleWin ? InputAvailableConsoleWin( vwbAvail ) : InputAvailableApplication( vwbAvail ); |
| #else |
| // Do nothing |
| return MIstatus::success; |
| #endif // ifdef _MSC_VER |
| } |
| |
| //++ ------------------------------------------------------------------------------------ |
| // Details: Determine if stdin has any characters present in its buffer. If running in a |
| // terminal use _kbhit(). |
| // Type: Method. |
| // Args: vwbAvail - (W) True = There is chars available, false = nothing there. |
| // Return: MIstatus::success - Functional succeeded. |
| // MIstatus::failure - Functional failed. |
| // Throws: None. |
| //-- |
| bool CMICmnStreamStdinWindows::InputAvailableConsoleWin( bool & vwbAvail ) |
| { |
| #ifdef _MSC_VER |
| if( m_nBytesToBeRead == 0 ) |
| { |
| // Get a windows handle to std input stream |
| HANDLE handle = ::GetStdHandle( STD_INPUT_HANDLE ); |
| DWORD nBytesWaiting = ::_kbhit(); |
| |
| // Save the number of bytes to be read so that we can check if input is available to be read |
| m_nBytesToBeRead = nBytesWaiting; |
| |
| // Return state of whether bytes are waiting or not |
| vwbAvail = (nBytesWaiting > 0); |
| } |
| #endif // ifdef _MSC_VER |
| |
| return MIstatus::success; |
| } |
| |
| //++ ------------------------------------------------------------------------------------ |
| // Details: Determine if stdin has any characters present in its buffer. |
| // Type: Method. |
| // Args: vwbAvail - (W) True = There is chars available, false = nothing there. |
| // Return: MIstatus::success - Functional succeeded. |
| // MIstatus::failure - Functional failed. |
| // Throws: None. |
| //-- |
| bool CMICmnStreamStdinWindows::InputAvailableApplication( bool & vwbAvail ) |
| { |
| #ifdef _MSC_VER |
| if( m_nBytesToBeRead == 0 ) |
| { |
| // Get a windows handle to std input stream |
| HANDLE handle = ::GetStdHandle( STD_INPUT_HANDLE ); |
| DWORD nBytesWaiting = 0; |
| |
| // Ask how many bytes are available |
| if( ::PeekNamedPipe( handle, nullptr, 0, nullptr, &nBytesWaiting, nullptr ) == FALSE ) |
| { |
| // This can occur when the client i.e. Eclipse closes the stdin stream 'cause it deems its work is finished |
| // for that debug session. May be we should be handling SIGKILL somehow? |
| const CMIUtilString osErrMsg( CMIUtilSystemWindows().GetOSLastError().StripCRAll() ); |
| SetErrorDescription( CMIUtilString::Format( MIRSRC( IDS_STDIN_ERR_CHKING_BYTE_AVAILABLE ), osErrMsg.c_str() ) ); |
| return MIstatus::failure; |
| } |
| |
| // Save the number of bytes to be read so that we can check if input is available to be read |
| m_nBytesToBeRead = nBytesWaiting; |
| |
| // Return state of whether bytes are waiting or not |
| vwbAvail = (nBytesWaiting > 0); |
| } |
| #endif // ifdef _MSC_VER |
| |
| return MIstatus::success; |
| } |
| |
| //++ ------------------------------------------------------------------------------------ |
| // Details: Wait on new line of data from stdin stream (completed by '\n' or '\r'). |
| // Type: Method. |
| // Args: vwErrMsg - (W) Empty string ok or error description. |
| // Return: MIchar * - text buffer pointer or NULL on failure. |
| // Throws: None. |
| //-- |
| const MIchar * CMICmnStreamStdinWindows::ReadLine( CMIUtilString & vwErrMsg ) |
| { |
| vwErrMsg.clear(); |
| |
| // Read user input |
| const MIchar * pText = ::fgets( &m_pCmdBuffer[ 0 ], m_constBufferSize, stdin ); |
| if( pText == nullptr ) |
| { |
| if( ::ferror( m_pStdin ) != 0 ) |
| vwErrMsg = ::strerror( errno ); |
| return nullptr; |
| } |
| |
| // Subtract the number of bytes read so that we can check if input is available to be read |
| m_nBytesToBeRead = m_nBytesToBeRead - ::strlen( pText ); |
| |
| // Strip off new line characters |
| for( MIchar * pI = m_pCmdBuffer; *pI != '\0'; pI++ ) |
| { |
| if( (*pI == '\n') || (*pI == '\r') ) |
| { |
| *pI = '\0'; |
| break; |
| } |
| } |
| |
| return pText; |
| } |