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//===-- MICmnStreamStdin.cpp ------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// Third Party Headers
#ifdef _MSC_VER
#include <Windows.h>
#endif
#include <string.h> // For std::strerror()
// In-house headers:
#include "MICmnStreamStdin.h"
#include "MICmnStreamStdout.h"
#include "MICmnResources.h"
#include "MICmnLog.h"
#include "MIDriver.h"
#include "MIUtilSingletonHelper.h"
//++ ------------------------------------------------------------------------------------
// Details: CMICmnStreamStdin constructor.
// Type: Method.
// Args: None.
// Return: None.
// Throws: None.
//--
CMICmnStreamStdin::CMICmnStreamStdin()
: m_strPromptCurrent("(gdb)")
, m_bShowPrompt(true)
, m_pCmdBuffer(nullptr)
{
}
//++ ------------------------------------------------------------------------------------
// Details: CMICmnStreamStdin destructor.
// Type: Overridable.
// Args: None.
// Return: None.
// Throws: None.
//--
CMICmnStreamStdin::~CMICmnStreamStdin()
{
Shutdown();
}
//++ ------------------------------------------------------------------------------------
// Details: Initialize resources for *this Stdin stream.
// Type: Method.
// Args: None.
// Return: MIstatus::success - Functional succeeded.
// MIstatus::failure - Functional failed.
// Throws: None.
//--
bool
CMICmnStreamStdin::Initialize()
{
m_clientUsageRefCnt++;
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);
if (bOk)
{
m_pCmdBuffer = new char[m_constBufferSize];
}
else
{
CMIUtilString strInitError(CMIUtilString::Format(MIRSRC(IDS_MI_INIT_ERR_STREAMSTDIN), errMsg.c_str()));
SetErrorDescription(strInitError);
return MIstatus::failure;
}
m_bInitialized = bOk;
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
CMICmnStreamStdin::Shutdown()
{
if (--m_clientUsageRefCnt > 0)
return MIstatus::success;
if (!m_bInitialized)
return MIstatus::success;
m_bInitialized = false;
ClrErrorDescription();
if (m_pCmdBuffer != nullptr)
{
delete[] m_pCmdBuffer;
m_pCmdBuffer = nullptr;
}
bool bOk = MIstatus::success;
CMIUtilString errMsg;
MI::ModuleShutdown<CMICmnResources>(IDE_MI_SHTDWN_ERR_RESOURCES, bOk, errMsg);
MI::ModuleShutdown<CMICmnLog>(IDS_MI_SHTDWN_ERR_LOG, bOk, errMsg);
if (!bOk)
{
SetErrorDescriptionn(MIRSRC(IDE_MI_SHTDWN_ERR_STREAMSTDIN), errMsg.c_str());
}
return MIstatus::success;
}
//++ ------------------------------------------------------------------------------------
// Details: Validate and set the text that forms the prompt on the command line.
// Type: Method.
// Args: vNewPrompt - (R) Text description.
// Return: MIstatus::success - Functional succeeded.
// MIstatus::failure - Functional failed.
// Throws: None.
//--
bool
CMICmnStreamStdin::SetPrompt(const CMIUtilString &vNewPrompt)
{
if (vNewPrompt.empty())
{
const CMIUtilString msg(CMIUtilString::Format(MIRSRC(IDS_STDIN_ERR_INVALID_PROMPT), vNewPrompt.c_str()));
CMICmnStreamStdout::Instance().Write(msg);
return MIstatus::failure;
}
m_strPromptCurrent = vNewPrompt;
return MIstatus::success;
}
//++ ------------------------------------------------------------------------------------
// Details: Retrieve the command line prompt text currently being used.
// Type: Method.
// Args: None.
// Return: const CMIUtilString & - Functional failed.
// Throws: None.
//--
const CMIUtilString &
CMICmnStreamStdin::GetPrompt() const
{
return m_strPromptCurrent;
}
//++ ------------------------------------------------------------------------------------
// Details: Set whether to display optional command line prompt. The prompt is output to
// stdout. Disable it when this may interfere with the client reading stdout as
// input and it tries to interpret the prompt text to.
// Type: Method.
// Args: vbYes - (R) True = Yes prompt is shown/output to the user (stdout), false = no prompt.
// Return: MIstatus::success - Functional succeeded.
// MIstatus::failure - Functional failed.
// Throws: None.
//--
void
CMICmnStreamStdin::SetEnablePrompt(const bool vbYes)
{
m_bShowPrompt = vbYes;
}
//++ ------------------------------------------------------------------------------------
// Details: Get whether to display optional command line prompt. The prompt is output to
// stdout. Disable it when this may interfere with the client reading stdout as
// input and it tries to interpret the prompt text to.
// Type: Method.
// Args: None.
// Return: bool - True = Yes prompt is shown/output to the user (stdout), false = no prompt.
// Throws: None.
//--
bool
CMICmnStreamStdin::GetEnablePrompt() const
{
return m_bShowPrompt;
}
//++ ------------------------------------------------------------------------------------
// 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: char * - text buffer pointer or NULL on failure.
// Throws: None.
//--
const char *
CMICmnStreamStdin::ReadLine(CMIUtilString &vwErrMsg)
{
vwErrMsg.clear();
// Read user input
const char *pText = ::fgets(&m_pCmdBuffer[0], m_constBufferSize, stdin);
if (pText == nullptr)
{
#ifdef _MSC_VER
// Was Ctrl-C hit?
// On Windows, Ctrl-C gives an ERROR_OPERATION_ABORTED as error on the command-line.
// The end-of-file indicator is also set, so without this check we will exit next if statement.
if (::GetLastError() == ERROR_OPERATION_ABORTED)
return nullptr;
#endif
if (::feof(stdin))
{
const bool bForceExit = true;
CMIDriver::Instance().SetExitApplicationFlag(bForceExit);
}
else if (::ferror(stdin) != 0)
vwErrMsg = ::strerror(errno);
return nullptr;
}
// Strip off new line characters
for (char *pI = m_pCmdBuffer; *pI != '\0'; pI++)
{
if ((*pI == '\n') || (*pI == '\r'))
{
*pI = '\0';
break;
}
}
return pText;
}
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