torc::generic::Scanner Class Reference

#include <Scanner.hpp>

Inheritance diagram for torc::generic::Scanner:

Collaboration diagram for torc::generic::Scanner:

Public Member Functions
	Scanner (std::istream *arg_yyin=0, std::ostream *arg_yyout=0)
virtual	~Scanner ()
virtual Parser::token_type	lex (Parser::semantic_type *yylval, Parser::location_type *yylloc)
void	set_debug (bool b)
bool	getIsIdContext () const
void	setIsIdContext (bool inIsIdContext)
void	skipThisRule (char *yytext)
bool	getAppendToBuffer ()
void	setAppendToBuffer (bool inAppendToBuffer)
void	resetBuffer ()
void	addToBuffer (const char *str)
std::string	getBuffer ()
bool	getAppendToUserDataBuffer ()
void	setAppendToUserDataBuffer (bool inAppendToBuffer)
void	addToUserDataBuffer (const char *str)
void	resetUserDataBuffer ()
std::string	getUserDataBuffer ()

Private Attributes
bool	mIsIdContext
bool	mAppendToBuffer
bool	mAppendToUserDataBuffer
std::string	mBuffer
std::string	mUserDataBuffer
bool	mIsIdAlreadyAdded

Detailed Description

Scanner is a derived class to add some extra function to the scanner class. Flex itself creates a class named FlexLexer, which is renamed using macros to EdifFlexLexer. However we change the context of the generated yylex() function to be contained within the Scanner class. This is required because the yylex() defined in EdifFlexLexer has no parameters.

Definition at line 55 of file Scanner.hpp.

Constructor & Destructor Documentation

torc::generic::Scanner::Scanner	(	std::istream *	arg_yyin = 0,
		std::ostream *	arg_yyout = 0
	)

Create a new scanner object. The streams arg_yyin and arg_yyout default to cin and cout, but that assignment is only made when initializing in yylex().

Definition at line 7042 of file Scanner.cc.

: EdifFlexLexer(in, out),
  mIsIdContext(false),
  mAppendToBuffer(false),
  mAppendToUserDataBuffer(false),
  mBuffer(),
  mUserDataBuffer(),
  mIsIdAlreadyAdded(false)  
{}

torc::generic::Scanner::~Scanner ( )

virtual

Required for virtual functions

Definition at line 7053 of file Scanner.cc.

{}

Member Function Documentation

void torc::generic::Scanner::addToBuffer

(

const char *

str

)

Definition at line 7108 of file Scanner.cc.

                                    {
    if(getAppendToBuffer())
    {
        mBuffer += str;
    }
}

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void torc::generic::Scanner::addToUserDataBuffer

(

const char *

str

)

Definition at line 7116 of file Scanner.cc.

                                            {
    if(getAppendToUserDataBuffer() && (mIsIdAlreadyAdded == false))
    {
        mUserDataBuffer += str;
    }
    mIsIdAlreadyAdded = false;
}

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bool torc::generic::Scanner::getAppendToBuffer ( )

inline

Definition at line 116 of file Scanner.hpp.

                                       {
    return mAppendToBuffer;
}

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bool torc::generic::Scanner::getAppendToUserDataBuffer ( )

inline

Definition at line 124 of file Scanner.hpp.

                                               {
    return mAppendToUserDataBuffer;
}

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std::string torc::generic::Scanner::getBuffer ( )

inline

Definition at line 120 of file Scanner.hpp.

                                    {
    return mBuffer;
}

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bool torc::generic::Scanner::getIsIdContext ( ) const

inline

Definition at line 108 of file Scanner.hpp.

                                          {
    return mIsIdContext;
}

std::string torc::generic::Scanner::getUserDataBuffer ( )

inline

Definition at line 128 of file Scanner.hpp.

                                            {
    return mUserDataBuffer;
}

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virtual Parser::token_type torc::generic::Scanner::lex ( Parser::semantic_type *  yylval, Parser::location_type *  yylloc  )

virtual

This is the main lexing function. It is generated by flex according to the macro declaration YY_DECL above. The generated bison parser then calls this virtual function to fetch new tokens.

void torc::generic::Scanner::resetBuffer

(

)

Definition at line 7093 of file Scanner.cc.

                     {
    mBuffer = "";
}

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void torc::generic::Scanner::resetUserDataBuffer

(

)

Definition at line 7103 of file Scanner.cc.

                             {
    mUserDataBuffer = "";
}

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void torc::generic::Scanner::set_debug

(

bool

b

)

Enable debug output (via arg_yyout) if compiled into the scanner.

Definition at line 7125 of file Scanner.cc.

{
    yy_flex_debug = b;
}

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void torc::generic::Scanner::setAppendToBuffer

(

bool

inAppendToBuffer

)

Definition at line 7088 of file Scanner.cc.

                                                {
    mAppendToBuffer = inAppendToBuffer;
}

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void torc::generic::Scanner::setAppendToUserDataBuffer

(

bool

inAppendToBuffer

)

Definition at line 7098 of file Scanner.cc.

                                                        {
    mAppendToUserDataBuffer = inAppendToBuffer;
}

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void torc::generic::Scanner::setIsIdContext ( bool  inIsIdContext )

inline

Definition at line 112 of file Scanner.hpp.

                                                      {
    mIsIdContext = inIsIdContext;
}

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void torc::generic::Scanner::skipThisRule

(

char *

yytext

)

Definition at line 7057 of file Scanner.cc.

                                  {
    unsigned char c;
    int scope = 0;
    while(true)
    {
        c=yyinput();
        switch(c)
        {
            case '(':
                {
                    scope++;
                    break;
                }
            case ')':
                {
                    if(-1 == scope)
                    {
                        yyunput(c, yytext);
                        return;
                    }
                    scope--;
                    break;
                }
            default:
                {
                }
        }
    }
}

Field Documentation

bool torc::generic::Scanner::mAppendToBuffer

private

Definition at line 101 of file Scanner.hpp.

bool torc::generic::Scanner::mAppendToUserDataBuffer

private

Definition at line 102 of file Scanner.hpp.

std::string torc::generic::Scanner::mBuffer

private

Definition at line 103 of file Scanner.hpp.

bool torc::generic::Scanner::mIsIdAlreadyAdded

private

Definition at line 105 of file Scanner.hpp.

bool torc::generic::Scanner::mIsIdContext

private

Definition at line 100 of file Scanner.hpp.

std::string torc::generic::Scanner::mUserDataBuffer

private

Definition at line 104 of file Scanner.hpp.

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The documentation for this class was generated from the following files:

• Scanner.hpp
• Scanner.cc