diff options
Diffstat (limited to 'tools/lldb-mi/MICmnStreamStdinLinux.cpp')
-rw-r--r-- | tools/lldb-mi/MICmnStreamStdinLinux.cpp | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/tools/lldb-mi/MICmnStreamStdinLinux.cpp b/tools/lldb-mi/MICmnStreamStdinLinux.cpp new file mode 100644 index 000000000000..f73dc32d8258 --- /dev/null +++ b/tools/lldb-mi/MICmnStreamStdinLinux.cpp @@ -0,0 +1,212 @@ +//===-- MICmnStreamStdinLinux.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: CMICmnStreamStdinLinux 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 <sys/select.h> +#include <termios.h> +#endif // !defined( _MSC_VER ) +#include <string.h> // For std::strerror() + +// In-house headers: +#include "MICmnStreamStdinLinux.h" +#include "MICmnLog.h" +#include "MICmnResources.h" +#include "MIUtilSingletonHelper.h" + +//++ ------------------------------------------------------------------------------------ +// Details: CMICmnStreamStdinLinux constructor. +// Type: Method. +// Args: None. +// Return: None. +// Throws: None. +//-- +CMICmnStreamStdinLinux::CMICmnStreamStdinLinux( void ) +: m_constBufferSize( 1024 ) +, m_pStdin( nullptr ) +, m_pCmdBuffer( nullptr ) +{ +} + +//++ ------------------------------------------------------------------------------------ +// Details: CMICmnStreamStdinLinux destructor. +// Type: Overridable. +// Args: None. +// Return: None. +// Throws: None. +//-- +CMICmnStreamStdinLinux::~CMICmnStreamStdinLinux( 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 CMICmnStreamStdinLinux::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; + } + + // Clear error indicators for std input + ::clearerr( stdin ); + + 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 CMICmnStreamStdinLinux::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; + + // 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 CMICmnStreamStdinLinux::InputAvailable( bool & vwbAvail ) +{ +/* AD: Not used ATM but could come in handy just in case we need to do + this, poll for input + + static const int STDIN = 0; + static bool bInitialized = false; + + if( !bInitialized ) + { + // Use termios to turn off line buffering + ::termios term; + ::tcgetattr( STDIN, &term ); + ::term.c_lflag &= ~ICANON; + ::tcsetattr( STDIN, TCSANOW, &term ); + ::setbuf( stdin, NULL ); + bInitialized = true; + } + + int nBytesWaiting; + ::ioctl( STDIN, FIONREAD, &nBytesWaiting ); + vwbAvail = (nBytesWaiting > 0); + + return MIstatus::success; +*/ + + 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 * CMICmnStreamStdinLinux::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; + } + + // Strip off new line characters + for( MIchar * pI = m_pCmdBuffer; *pI != '\0'; pI++ ) + { + if( (*pI == '\n') || (*pI == '\r') ) + { + *pI = '\0'; + break; + } + } + + return pText; +} + |