llvm-project/lldb/tools/lldb-mi/MICmdArgContext.cpp

//===-- MICmnArgContext.cpp -------------------------------------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

//++
// File:		MICmnArgContext.cpp
//
// Overview:	CMICmdArgContext implementation.
//
// Environment:	Compilers:	Visual C++ 12.
//							gcc (Ubuntu/Linaro 4.8.1-10ubuntu9) 4.8.1
//				Libraries:	See MIReadmetxt. 
//
// Copyright:	None.
//--

// In-house headers:
#include "MICmdArgContext.h"

//++ ------------------------------------------------------------------------------------
// Details:	CMICmdArgContext constructor.
// Type:	Method.
// Args:	None.
// Return:	None.
// Throws:	None.
//--
CMICmdArgContext::CMICmdArgContext( void )
:	m_constCharSpace( ' ' )
,	m_constStrSpace( " " )
{
}

//++ ------------------------------------------------------------------------------------
// Details:	CMICmdArgContext constructor.
// Type:	Method.
// Args:	vrCmdLineArgsRaw	- (R) The text description of the arguments options.
// Return:	None.
// Throws:	None.
//--
CMICmdArgContext::CMICmdArgContext( const CMIUtilString & vrCmdLineArgsRaw )
:	m_strCmdArgsAndOptions( vrCmdLineArgsRaw )
,	m_constCharSpace( ' ' )
,	m_constStrSpace( " " )
{
}

//++ ------------------------------------------------------------------------------------
// Details:	CMICmdArgContext destructor.
// Type:	Method.
// Args:	None.
// Return:	None.
// Throws:	None.
//--
CMICmdArgContext::~CMICmdArgContext( void )
{
}

//++ ------------------------------------------------------------------------------------
// Details:	Retrieve the remainder of the command's argument options left to parse.
// Type:	Method.
// Args:	None.
// Return:	CMIUtilString &	- Argument options text.
// Throws:	None.
//--
const CMIUtilString & CMICmdArgContext::GetArgsLeftToParse( void ) const
{
	return m_strCmdArgsAndOptions;
}

//++ ------------------------------------------------------------------------------------
// Details:	Ask if this arguments string has any arguments.
// Type:	Method.
// Args:	None.
// Return:	bool	- True = Has one or more arguments present, false = no arguments.
// Throws:	None.
//--
bool CMICmdArgContext::IsEmpty( void ) const
{
	return m_strCmdArgsAndOptions.empty();
}
	
//++ ------------------------------------------------------------------------------------
// Details:	Remove the argument from the options text and any space after the argument
//			if applicable.
// Type:	Method.
// Args:	vArg	- (R) The name of the argument.
// Return:	MIstatus::success - Functional succeeded.
//			MIstatus::failure - Functional failed.
// Throws:	None.
//--
bool CMICmdArgContext::RemoveArg( const CMIUtilString & vArg )
{
	if( vArg.empty() )
		return MIstatus::success;

	const MIuint nLen = vArg.length();
	const MIuint nLenCntxt = m_strCmdArgsAndOptions.length();
	if( nLen > nLenCntxt )
		return MIstatus::failure;

	MIuint nExtraSpace = 0;
	MIint nPos = m_strCmdArgsAndOptions.find( vArg );
	while( 1 )
	{
		if( nPos == (MIint) std::string::npos )
			return MIstatus::success;

		bool bPass1 = false;
		if( nPos != 0 )
		{
			if( m_strCmdArgsAndOptions[ nPos - 1 ] == m_constCharSpace )
				bPass1 = true;
		}
		else
			bPass1 = true;

		const MIuint nEnd = nPos + nLen;
		
		if( bPass1 )
		{
			bool bPass2 = false;
			if( nEnd < nLenCntxt )
			{
				if( m_strCmdArgsAndOptions[ nEnd ] == m_constCharSpace )
				{
					bPass2 = true;
					nExtraSpace = 1;
				}
			}
			else
				bPass2 = true;

			if( bPass2 )
				break;
		}

		nPos = m_strCmdArgsAndOptions.find( vArg, nEnd );
	}
	
	const MIuint nPosEnd = nLen + nExtraSpace;
	m_strCmdArgsAndOptions = m_strCmdArgsAndOptions.replace( nPos, nPosEnd, "" ).c_str();
	m_strCmdArgsAndOptions = m_strCmdArgsAndOptions.Trim();

	return MIstatus::success;
}

//++ ------------------------------------------------------------------------------------
// Details:	Remove the argument at the Nth word position along in the context string. 
//			Any space after the argument is removed if applicable. A search is not 
//			performed as there may be more than one vArg with the same 'name' in the
//			context string.
// Type:	Method.
// Args:	vArg		- (R) The name of the argument.
//			nArgIndex	- (R) The word count position to which to remove the vArg word.
// Return:	MIstatus::success - Functional succeeded.
//			MIstatus::failure - Functional failed.
// Throws:	None.
//--
bool CMICmdArgContext::RemoveArgAtPos( const CMIUtilString & vArg, const MIuint nArgIndex )
{
	MIuint nWordIndex = 0;
	CMIUtilString strBuildContextUp;
	const CMIUtilString::VecString_t vecWords( GetArgs() );
	const bool bSpaceRequired( GetNumberArgsPresent() > 2 );

	CMIUtilString::VecString_t::const_iterator it = vecWords.begin();
	const CMIUtilString::VecString_t::const_iterator itEnd = vecWords.end();
	while( it != itEnd )
	{
		const CMIUtilString & rWord( *it );
		if( nWordIndex++ != nArgIndex )
		{
			// Single words
			strBuildContextUp += rWord;
			if( bSpaceRequired )
				strBuildContextUp += m_constStrSpace;
		}
		else
		{
			// If quoted loose quoted text
			if( ++it != itEnd ) 
			{
				CMIUtilString words = rWord;
				while( vArg != words )
				{
					if( bSpaceRequired )
						words += m_constStrSpace;
					words += *it;
					if( ++it == itEnd )
						break;
				}
				if( it != itEnd )
					--it;
			}
		}
		
		// Next
		if( it != itEnd )
			++it;
	}
	
	m_strCmdArgsAndOptions = strBuildContextUp;
	m_strCmdArgsAndOptions = m_strCmdArgsAndOptions.Trim();

	return MIstatus::success;
}

//++ ------------------------------------------------------------------------------------
// Details:	Retrieve number of arguments or options present in the command's option text.
// Type:	Method.
// Args:	None.
// Return:	MIuint	- 0 to n arguments present.
// Throws:	None.
//--
MIuint CMICmdArgContext::GetNumberArgsPresent( void ) const
{
	CMIUtilString::VecString_t vecOptions;
	return m_strCmdArgsAndOptions.SplitConsiderQuotes( m_constStrSpace, vecOptions );
}

//++ ------------------------------------------------------------------------------------
// Details:	Retrieve all the arguments or options remaining in *this context.
// Type:	Method.
// Args:	None.
// Return:	MIUtilString::VecString_t	- List of args remaining.
// Throws:	None.
//--
CMIUtilString::VecString_t CMICmdArgContext::GetArgs( void ) const
{
	CMIUtilString::VecString_t vecOptions;
	m_strCmdArgsAndOptions.SplitConsiderQuotes( m_constStrSpace, vecOptions );
	return vecOptions;
}
	
//++ ------------------------------------------------------------------------------------
// Details:	Copy assignment operator.
// Type:	Method.
// Args:	vOther	- (R) The variable to copy from.
// Return:	CMIUtilString & - this object.
// Throws:	None.
//--
CMICmdArgContext & CMICmdArgContext::operator= ( const CMICmdArgContext & vOther )
{
	if( this != &vOther )
	{
		m_strCmdArgsAndOptions = vOther.m_strCmdArgsAndOptions;
	}	
	
	return *this;
}