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#ifndef INC_LexerSharedInputState_hpp__ |
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#define INC_LexerSharedInputState_hpp__ |
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|
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/* ANTLR Translator Generator |
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* Project led by Terence Parr at http://www.jGuru.com |
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* Software rights: http://www.antlr.org/license.html |
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* |
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* $Id: LexerSharedInputState.hpp,v 1.1 2005-12-02 15:38:02 tim Exp $ |
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*/ |
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|
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#include <antlr/config.hpp> |
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#include <antlr/InputBuffer.hpp> |
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#include <antlr/RefCount.hpp> |
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#include <antlr/CharBuffer.hpp> |
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#include <string> |
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|
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#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE |
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namespace antlr { |
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#endif |
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|
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/** This object contains the data associated with an |
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* input stream of characters. Multiple lexers |
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* share a single LexerSharedInputState to lex |
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* the same input stream. |
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*/ |
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class ANTLR_API LexerInputState { |
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public: |
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/** Construct a new LexerInputState |
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* @param inbuf the InputBuffer to read from. The object is deleted together |
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* with the LexerInputState object. |
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*/ |
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LexerInputState(InputBuffer* inbuf) |
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: column(1) |
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, line(1) |
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, tokenStartColumn(1) |
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, tokenStartLine(1) |
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, guessing(0) |
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, filename("") |
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, input(inbuf) |
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, inputResponsible(true) |
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{ |
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} |
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|
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/** Construct a new LexerInputState |
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* @param inbuf the InputBuffer to read from. |
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*/ |
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LexerInputState(InputBuffer& inbuf) |
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: column(1) |
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, line(1) |
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, tokenStartColumn(1) |
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, tokenStartLine(1) |
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, guessing(0) |
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, filename("") |
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, input(&inbuf) |
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, inputResponsible(false) |
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{ |
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} |
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|
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/** Construct a new LexerInputState |
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* @param in an istream to read from. |
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* @see antlr.CharBuffer |
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*/ |
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LexerInputState(ANTLR_USE_NAMESPACE(std)istream& in) |
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: column(1) |
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, line(1) |
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, tokenStartColumn(1) |
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, tokenStartLine(1) |
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, guessing(0) |
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, filename("") |
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, input(new CharBuffer(in)) |
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, inputResponsible(true) |
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{ |
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} |
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|
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/** Reset the LexerInputState with a specified stream and filename. |
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* This method is a hack, dunno what I was thinking when I added it. |
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* This should actually be done in a subclass. |
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* @deprecated |
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*/ |
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virtual void initialize( ANTLR_USE_NAMESPACE(std)istream& in, const char* file = "" ) |
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{ |
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column = 1; |
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line = 1; |
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tokenStartColumn = 1; |
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tokenStartLine = 1; |
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guessing = 0; |
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filename = file; |
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|
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if( input && inputResponsible ) |
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delete input; |
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|
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input = new CharBuffer(in); |
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inputResponsible = true; |
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} |
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|
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/** Reset the LexerInputState to initial state. |
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* The underlying InputBuffer is also reset. |
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*/ |
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virtual void reset( void ) |
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{ |
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column = 1; |
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line = 1; |
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tokenStartColumn = 1; |
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tokenStartLine = 1; |
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guessing = 0; |
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input->reset(); |
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} |
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|
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/** Set the file position of the SharedLexerInputState. |
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* @param line_ line number to be set |
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* @param column_ column number to be set |
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*/ |
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void setPosition( int line_, int column_ ) |
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{ |
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line = line_; |
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column = column_; |
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} |
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|
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virtual ~LexerInputState() |
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{ |
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if (inputResponsible) |
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delete input; |
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} |
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|
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int column; |
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int line; |
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int tokenStartColumn; |
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int tokenStartLine; |
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int guessing; |
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/** What file (if known) caused the problem? */ |
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ANTLR_USE_NAMESPACE(std)string filename; |
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InputBuffer& getInput(); |
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private: |
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/// Input buffer we use |
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InputBuffer* input; |
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/// Who is responsible for cleaning up the InputBuffer? |
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bool inputResponsible; |
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|
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// we don't want these: |
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LexerInputState(const LexerInputState&); |
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LexerInputState& operator=(const LexerInputState&); |
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}; |
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|
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inline InputBuffer& LexerInputState::getInput() |
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{ |
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return *input; |
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} |
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|
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/// A reference counted LexerInputState object |
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typedef RefCount<LexerInputState> LexerSharedInputState; |
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|
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#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE |
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} |
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#endif |
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|
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#endif //INC_LexerSharedInputState_hpp__ |
