1662 lines
50 KiB
C++
Executable File
1662 lines
50 KiB
C++
Executable File
ANTLR_BEGIN_NAMESPACE()
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template<class ImplTraits, class SuperType>
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ANTLR_INLINE IntStream<ImplTraits, SuperType>::IntStream()
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{
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m_lastMarker = 0;
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m_upper_case = false;
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}
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template<class ImplTraits, class SuperType>
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ANTLR_INLINE typename IntStream<ImplTraits, SuperType>::StringType IntStream<ImplTraits, SuperType>::getSourceName()
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{
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return m_streamName;
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}
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template<class ImplTraits, class SuperType>
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ANTLR_INLINE typename IntStream<ImplTraits, SuperType>::StringType& IntStream<ImplTraits, SuperType>::get_streamName()
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{
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return m_streamName;
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}
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template<class ImplTraits, class SuperType>
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ANTLR_INLINE const typename IntStream<ImplTraits, SuperType>::StringType& IntStream<ImplTraits, SuperType>::get_streamName() const
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{
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return m_streamName;
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}
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template<class ImplTraits, class SuperType>
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ANTLR_INLINE ANTLR_MARKER IntStream<ImplTraits, SuperType>::get_lastMarker() const
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{
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return m_lastMarker;
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}
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template<class ImplTraits, class SuperType>
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ANTLR_INLINE void IntStream<ImplTraits, SuperType>::setUcaseLA(bool flag)
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{
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m_upper_case = flag;
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}
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template<class ImplTraits, class SuperType>
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ANTLR_INLINE SuperType* IntStream<ImplTraits, SuperType>::get_super()
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{
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return static_cast<SuperType*>(this);
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}
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template<class ImplTraits, class SuperType>
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void IntStream<ImplTraits, SuperType>::consume()
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{
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SuperType* input = this->get_super();
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const ANTLR_UINT8* nextChar = input->get_nextChar();
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const ANTLR_UINT8* data = input->get_data();
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ANTLR_UINT32 sizeBuf = input->get_sizeBuf();
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if ( nextChar < ( data + sizeBuf ) )
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{
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/* Indicate one more character in this line
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*/
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input->inc_charPositionInLine();
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if ((ANTLR_UCHAR)(*(nextChar)) == input->get_newlineChar() )
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{
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/* Reset for start of a new line of input
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*/
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input->inc_line();
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input->set_charPositionInLine(0);
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input->set_currentLine(nextChar + 1);
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}
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/* Increment to next character position
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*/
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input->set_nextChar( nextChar + 1 );
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}
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}
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template<class ImplTraits, class SuperType>
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ANTLR_UINT32 IntStream<ImplTraits, SuperType>::_LA( ANTLR_INT32 la )
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{
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SuperType* input = this->get_super();
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const ANTLR_UINT8* nextChar = input->get_nextChar();
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const ANTLR_UINT8* data = input->get_data();
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ANTLR_UINT32 sizeBuf = input->get_sizeBuf();
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if (( nextChar + la - 1) >= (data + sizeBuf))
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{
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return ANTLR_CHARSTREAM_EOF;
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}
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else
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{
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if( !m_upper_case )
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return (ANTLR_UCHAR)(*(nextChar + la - 1));
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else
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return (ANTLR_UCHAR)toupper(*(nextChar + la - 1));
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}
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}
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template<class ImplTraits, class SuperType>
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ANTLR_MARKER IntStream<ImplTraits, SuperType>::mark()
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{
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LexState<ImplTraits>* state;
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SuperType* input = this->get_super();
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/* New mark point
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*/
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input->inc_markDepth();
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/* See if we are revisiting a mark as we can just reuse the vector
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* entry if we are, otherwise, we need a new one
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*/
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if (input->get_markDepth() > input->get_markers().size() )
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{
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input->get_markers().push_back( LexState<ImplTraits>() );
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LexState<ImplTraits>& state_r = input->get_markers().back();
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state = &state_r;
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}
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else
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{
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LexState<ImplTraits>& state_r = input->get_markers().at( input->get_markDepth() - 1 );
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state = &state_r;
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/* Assume no errors for speed, it will just blow up if the table failed
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* for some reasons, hence lots of unit tests on the tables ;-)
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*/
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}
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/* We have created or retrieved the state, so update it with the current
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* elements of the lexer state.
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*/
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state->set_charPositionInLine( input->get_charPositionInLine() );
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state->set_currentLine( input->get_currentLine() );
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state->set_line( input->get_line() );
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state->set_nextChar( input->get_nextChar() );
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m_lastMarker = input->get_markDepth();
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/* And that's it
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*/
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return input->get_markDepth();
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}
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template<class ImplTraits, class SuperType>
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ANTLR_MARKER IntStream<ImplTraits, SuperType>::index()
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{
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SuperType* input = this->get_super();
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return input->index_impl();
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}
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template<class ImplTraits, class SuperType>
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void IntStream<ImplTraits, SuperType>::rewind(ANTLR_MARKER mark)
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{
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SuperType* input = this->get_super();
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/* Perform any clean up of the marks
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*/
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this->release(mark);
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/* Find the supplied mark state
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*/
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ANTLR_UINT32 idx = static_cast<ANTLR_UINT32>( mark-1 );
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typename ImplTraits::LexStateType& state = input->get_markers().at( idx );
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/* Seek input pointer to the requested point (note we supply the void *pointer
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* to whatever is implementing the int stream to seek).
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*/
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this->seek( (ANTLR_MARKER)state.get_nextChar() );
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/* Reset to the reset of the information in the mark
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*/
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input->set_charPositionInLine( state.get_charPositionInLine() );
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input->set_currentLine( state.get_currentLine() );
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input->set_line( state.get_line() );
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input->set_nextChar( state.get_nextChar() );
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/* And we are done
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*/
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}
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template<class ImplTraits, class SuperType>
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void IntStream<ImplTraits, SuperType>::rewindLast()
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{
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this->rewind(m_lastMarker);
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}
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template<class ImplTraits, class SuperType>
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void IntStream<ImplTraits, SuperType>::release(ANTLR_MARKER mark)
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{
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SuperType* input = this->get_super();
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/* We don't do much here in fact as we never free any higher marks in
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* the hashtable as we just resuse any memory allocated for them.
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*/
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input->set_markDepth( (ANTLR_UINT32)(mark - 1) );
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}
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template<class ImplTraits, class SuperType>
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void IntStream<ImplTraits, SuperType>::setupIntStream(bool, bool)
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{
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}
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template<class ImplTraits, class SuperType>
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void IntStream<ImplTraits, SuperType>::seek(ANTLR_MARKER seekPoint)
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{
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ANTLR_INT32 count;
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SuperType* input = this->get_super();
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ANTLR_MARKER nextChar = (ANTLR_MARKER) input->get_nextChar();
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/* If the requested seek point is less than the current
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* input point, then we assume that we are resetting from a mark
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* and do not need to scan, but can just set to there.
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*/
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if (seekPoint <= nextChar)
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{
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input->set_nextChar((ANTLR_UINT8*) seekPoint);
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}
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else
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{
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count = (ANTLR_UINT32)(seekPoint - nextChar);
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while (count--)
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{
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this->consume();
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}
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}
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}
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template<class ImplTraits, class SuperType>
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IntStream<ImplTraits, SuperType>::~IntStream()
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{
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}
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template<class ImplTraits, class SuperType>
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ANTLR_UINT32 EBCDIC_IntStream<ImplTraits, SuperType>::_LA( ANTLR_INT32 la)
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{
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// EBCDIC to ASCII conversion table
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//
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// This for EBCDIC EDF04 translated to ISO-8859.1 which is the usually accepted POSIX
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// translation and the character tables are published all over the interweb.
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//
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const ANTLR_UCHAR e2a[256] =
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{
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0x00, 0x01, 0x02, 0x03, 0x85, 0x09, 0x86, 0x7f,
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0x87, 0x8d, 0x8e, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
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0x10, 0x11, 0x12, 0x13, 0x8f, 0x0a, 0x08, 0x97,
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0x18, 0x19, 0x9c, 0x9d, 0x1c, 0x1d, 0x1e, 0x1f,
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0x80, 0x81, 0x82, 0x83, 0x84, 0x92, 0x17, 0x1b,
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0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x05, 0x06, 0x07,
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0x90, 0x91, 0x16, 0x93, 0x94, 0x95, 0x96, 0x04,
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0x98, 0x99, 0x9a, 0x9b, 0x14, 0x15, 0x9e, 0x1a,
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0x20, 0xa0, 0xe2, 0xe4, 0xe0, 0xe1, 0xe3, 0xe5,
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0xe7, 0xf1, 0x60, 0x2e, 0x3c, 0x28, 0x2b, 0x7c,
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0x26, 0xe9, 0xea, 0xeb, 0xe8, 0xed, 0xee, 0xef,
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0xec, 0xdf, 0x21, 0x24, 0x2a, 0x29, 0x3b, 0x9f,
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0x2d, 0x2f, 0xc2, 0xc4, 0xc0, 0xc1, 0xc3, 0xc5,
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0xc7, 0xd1, 0x5e, 0x2c, 0x25, 0x5f, 0x3e, 0x3f,
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0xf8, 0xc9, 0xca, 0xcb, 0xc8, 0xcd, 0xce, 0xcf,
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0xcc, 0xa8, 0x3a, 0x23, 0x40, 0x27, 0x3d, 0x22,
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0xd8, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
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0x68, 0x69, 0xab, 0xbb, 0xf0, 0xfd, 0xfe, 0xb1,
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0xb0, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0x70,
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0x71, 0x72, 0xaa, 0xba, 0xe6, 0xb8, 0xc6, 0xa4,
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0xb5, 0xaf, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
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0x79, 0x7a, 0xa1, 0xbf, 0xd0, 0xdd, 0xde, 0xae,
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0xa2, 0xa3, 0xa5, 0xb7, 0xa9, 0xa7, 0xb6, 0xbc,
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0xbd, 0xbe, 0xac, 0x5b, 0x5c, 0x5d, 0xb4, 0xd7,
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0xf9, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
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0x48, 0x49, 0xad, 0xf4, 0xf6, 0xf2, 0xf3, 0xf5,
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0xa6, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, 0x50,
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0x51, 0x52, 0xb9, 0xfb, 0xfc, 0xdb, 0xfa, 0xff,
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0xd9, 0xf7, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
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0x59, 0x5a, 0xb2, 0xd4, 0xd6, 0xd2, 0xd3, 0xd5,
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0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
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0x38, 0x39, 0xb3, 0x7b, 0xdc, 0x7d, 0xda, 0x7e
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};
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SuperType* input = this->get_super();
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if (( input->get_nextChar() + la - 1) >= ( input->get_data() + input->get_sizeBuf() ))
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{
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return ANTLR_CHARSTREAM_EOF;
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}
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else
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{
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// Translate the required character via the constant conversion table
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//
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return e2a[(*(input->get_nextChar() + la - 1))];
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}
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}
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template<class ImplTraits, class SuperType>
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void EBCDIC_IntStream<ImplTraits, SuperType>::setupIntStream()
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{
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SuperType* super = this->get_super();
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super->set_charByteSize(1);
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}
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template<class ImplTraits, class SuperType>
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ANTLR_UINT32 UTF16_IntStream<ImplTraits, SuperType>::_LA( ANTLR_INT32 i)
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{
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return this->_LA(i, ClassForwarder< typename ImplTraits::Endianness >() );
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}
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template<class ImplTraits, class SuperType>
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void UTF16_IntStream<ImplTraits, SuperType>::consume()
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{
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this->consume( ClassForwarder< typename ImplTraits::Endianness >() );
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}
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template<class ImplTraits, class SuperType>
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ANTLR_MARKER UTF16_IntStream<ImplTraits, SuperType>::index()
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{
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SuperType* input = this->get_super();
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return (ANTLR_MARKER)(input->get_nextChar());
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}
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template<class ImplTraits, class SuperType>
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void UTF16_IntStream<ImplTraits, SuperType>::seek(ANTLR_MARKER seekPoint)
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{
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SuperType* input = this->get_super();
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// If the requested seek point is less than the current
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// input point, then we assume that we are resetting from a mark
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// and do not need to scan, but can just set to there as rewind will
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// reset line numbers and so on.
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//
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if (seekPoint <= (ANTLR_MARKER)(input->get_nextChar()))
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{
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input->set_nextChar( seekPoint );
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}
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else
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{
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// Call consume until we reach the asked for seek point or EOF
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//
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while( (this->_LA(1) != ANTLR_CHARSTREAM_EOF) && (seekPoint < (ANTLR_MARKER)input->get_nextChar() ) )
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{
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this->consume();
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}
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}
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}
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template<class ImplTraits, class SuperType>
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void IntStream<ImplTraits, SuperType>::findout_endian_spec(bool machineBigEndian, bool inputBigEndian)
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{
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// We must install different UTF16 routines according to whether the input
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// is the same endianess as the machine we are executing upon or not. If it is not
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// then we must install methods that can convert the endianess on the fly as they go
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//
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if(machineBigEndian == true)
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{
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// Machine is Big Endian, if the input is also then install the
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// methods that do not access input by bytes and reverse them.
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// Otherwise install endian aware methods.
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//
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if (inputBigEndian == true)
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{
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// Input is machine compatible
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//
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m_endian_spec = 1;
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}
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else
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{
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// Need to use methods that know that the input is little endian
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//
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m_endian_spec = 2;
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}
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}
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else
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{
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// Machine is Little Endian, if the input is also then install the
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// methods that do not access input by bytes and reverse them.
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// Otherwise install endian aware methods.
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//
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if (inputBigEndian == false)
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{
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// Input is machine compatible
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//
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m_endian_spec = 1;
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}
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else
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{
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// Need to use methods that know that the input is Big Endian
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//
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m_endian_spec = 3;
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}
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}
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}
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template<class ImplTraits, class SuperType>
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void UTF16_IntStream<ImplTraits, SuperType>::setupIntStream(bool machineBigEndian, bool inputBigEndian)
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{
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SuperType* super = this->get_super();
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super->set_charByteSize(2);
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this->findout_endian_spec( machineBigEndian, inputBigEndian );
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}
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template<class ImplTraits, class SuperType>
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ANTLR_UINT32 IntStream<ImplTraits, SuperType>::_LA( ANTLR_INT32 i, ClassForwarder<RESOLVE_ENDIAN_AT_RUNTIME> )
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{
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assert( (m_endian_spec >= 1) && (m_endian_spec <= 3));
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switch(m_endian_spec)
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{
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case 1:
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return this->_LA(i, ClassForwarder<BYTE_AGNOSTIC>() );
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break;
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case 2:
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return this->_LA(i, ClassForwarder<ANTLR_LITTLE_ENDIAN>() );
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break;
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case 3:
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return this->_LA(i, ClassForwarder<ANTLR_BIG_ENDIAN>() );
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break;
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default:
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break;
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}
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return 0;
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}
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template<class ImplTraits, class SuperType>
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void IntStream<ImplTraits, SuperType>::consume( ClassForwarder<RESOLVE_ENDIAN_AT_RUNTIME> )
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{
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assert( (m_endian_spec >= 1) && (m_endian_spec <= 3));
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switch(m_endian_spec)
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{
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case 1:
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this->consume( ClassForwarder<BYTE_AGNOSTIC>() );
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break;
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case 2:
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this->consume( ClassForwarder<ANTLR_LITTLE_ENDIAN>() );
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break;
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case 3:
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this->consume( ClassForwarder<ANTLR_BIG_ENDIAN>() );
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break;
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default:
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break;
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}
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}
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template<class ImplTraits, class SuperType>
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ANTLR_UINT32 UTF16_IntStream<ImplTraits, SuperType>::_LA( ANTLR_INT32 la, ClassForwarder<BYTE_AGNOSTIC> )
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{
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SuperType* input;
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UTF32 ch;
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UTF32 ch2;
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UTF16* nextChar;
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// Find the input interface and where we are currently pointing to
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// in the input stream
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//
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input = this->get_super;
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nextChar = input->get_nextChar();
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|
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// If a positive offset then advance forward, else retreat
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//
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if (la >= 0)
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{
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while (--la > 0 && (ANTLR_UINT8*)nextChar < ((ANTLR_UINT8*)input->get_data()) + input->get_sizeBuf() )
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{
|
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// Advance our copy of the input pointer
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//
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// Next char in natural machine byte order
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//
|
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ch = *nextChar++;
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// If we have a surrogate pair then we need to consume
|
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// a following valid LO surrogate.
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//
|
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if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_HIGH_END)
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{
|
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// If the 16 bits following the high surrogate are in the source buffer...
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//
|
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if ((ANTLR_UINT8*)(nextChar) < (((ANTLR_UINT8*)input->get_data()) + input->get_sizeBuf() ))
|
|
{
|
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// Next character is in natural machine byte order
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//
|
|
ch2 = *nextChar;
|
|
|
|
// If it's a valid low surrogate, consume it
|
|
//
|
|
if (ch2 >= UNI_SUR_LOW_START && ch2 <= UNI_SUR_LOW_END)
|
|
{
|
|
// We consumed one 16 bit character
|
|
//
|
|
nextChar++;
|
|
}
|
|
// Note that we ignore a valid hi surrogate that has no lo surrogate to go with
|
|
// it.
|
|
//
|
|
}
|
|
// Note that we ignore a valid hi surrogate that has no lo surrogate to go with
|
|
// it because the buffer ended
|
|
//
|
|
}
|
|
// Note that we did not check for an invalid low surrogate here, or that fact that the
|
|
// lo surrogate was missing. We just picked out one 16 bit character unless the character
|
|
// was a valid hi surrogate, in whcih case we consumed two 16 bit characters.
|
|
//
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// We need to go backwards from our input point
|
|
//
|
|
while (la++ < 0 && (ANTLR_UINT8*)nextChar > (ANTLR_UINT8*)input->get_data() )
|
|
{
|
|
// Get the previous 16 bit character
|
|
//
|
|
ch = *--nextChar;
|
|
|
|
// If we found a low surrogate then go back one more character if
|
|
// the hi surrogate is there
|
|
//
|
|
if (ch >= UNI_SUR_LOW_START && ch <= UNI_SUR_LOW_END)
|
|
{
|
|
ch2 = *(nextChar-1);
|
|
if (ch2 >= UNI_SUR_HIGH_START && ch2 <= UNI_SUR_HIGH_END)
|
|
{
|
|
// Yes, there is a high surrogate to match it so decrement one more and point to that
|
|
//
|
|
nextChar--;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Our local copy of nextChar is now pointing to either the correct character or end of file
|
|
//
|
|
// Input buffer size is always in bytes
|
|
//
|
|
if ( (ANTLR_UINT8*)nextChar >= (((ANTLR_UINT8*)input->get_data()) + input->get_sizeBuf() ))
|
|
{
|
|
return ANTLR_CHARSTREAM_EOF;
|
|
}
|
|
else
|
|
{
|
|
// Pick up the next 16 character (native machine byte order)
|
|
//
|
|
ch = *nextChar++;
|
|
|
|
// If we have a surrogate pair then we need to consume
|
|
// a following valid LO surrogate.
|
|
//
|
|
if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_HIGH_END)
|
|
{
|
|
// If the 16 bits following the high surrogate are in the source buffer...
|
|
//
|
|
if ((ANTLR_UINT8*)(nextChar) < (((ANTLR_UINT8*)input->get_data()) + input->get_sizeBuf()))
|
|
{
|
|
// Next character is in natural machine byte order
|
|
//
|
|
ch2 = *nextChar;
|
|
|
|
// If it's a valid low surrogate, consume it
|
|
//
|
|
if (ch2 >= UNI_SUR_LOW_START && ch2 <= UNI_SUR_LOW_END)
|
|
{
|
|
// Construct the UTF32 code point
|
|
//
|
|
ch = ((ch - UNI_SUR_HIGH_START) << halfShift)
|
|
+ (ch2 - UNI_SUR_LOW_START) + halfBase;
|
|
}
|
|
// Note that we ignore a valid hi surrogate that has no lo surrogate to go with
|
|
// it.
|
|
//
|
|
}
|
|
// Note that we ignore a valid hi surrogate that has no lo surrogate to go with
|
|
// it because the buffer ended
|
|
//
|
|
}
|
|
}
|
|
return ch;
|
|
}
|
|
|
|
template<class ImplTraits, class SuperType>
|
|
ANTLR_UINT32 UTF16_IntStream<ImplTraits, SuperType>::_LA( ANTLR_INT32 la, ClassForwarder<ANTLR_LITTLE_ENDIAN> )
|
|
{
|
|
SuperType* input;
|
|
UTF32 ch;
|
|
UTF32 ch2;
|
|
ANTLR_UCHAR* nextChar;
|
|
|
|
// Find the input interface and where we are currently pointing to
|
|
// in the input stream
|
|
//
|
|
input = this->get_super();
|
|
nextChar = input->get_nextChar();
|
|
|
|
// If a positive offset then advance forward, else retreat
|
|
//
|
|
if (la >= 0)
|
|
{
|
|
while (--la > 0 && (ANTLR_UINT8*)nextChar < ((ANTLR_UINT8*)input->get_data()) + input->get_sizeBuf() )
|
|
{
|
|
// Advance our copy of the input pointer
|
|
//
|
|
// Next char in Little Endian byte order
|
|
//
|
|
ch = (*nextChar) + (*(nextChar+1) << 8);
|
|
nextChar += 2;
|
|
|
|
// If we have a surrogate pair then we need to consume
|
|
// a following valid LO surrogate.
|
|
//
|
|
if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_HIGH_END)
|
|
{
|
|
// If the 16 bits following the high surrogate are in the source buffer...
|
|
//
|
|
if ((ANTLR_UINT8*)(nextChar) < (((ANTLR_UINT8*)input->get_data()) + input->get_sizeBuf() ))
|
|
{
|
|
// Next character is in little endian byte order
|
|
//
|
|
ch2 = (*nextChar) + (*(nextChar+1) << 8);
|
|
|
|
// If it's a valid low surrogate, consume it
|
|
//
|
|
if (ch2 >= UNI_SUR_LOW_START && ch2 <= UNI_SUR_LOW_END)
|
|
{
|
|
// We consumed one 16 bit character
|
|
//
|
|
nextChar += 2;
|
|
}
|
|
// Note that we ignore a valid hi surrogate that has no lo surrogate to go with
|
|
// it.
|
|
//
|
|
}
|
|
// Note that we ignore a valid hi surrogate that has no lo surrogate to go with
|
|
// it because the buffer ended
|
|
//
|
|
}
|
|
// Note that we did not check for an invalid low surrogate here, or that fact that the
|
|
// lo surrogate was missing. We just picked out one 16 bit character unless the character
|
|
// was a valid hi surrogate, in whcih case we consumed two 16 bit characters.
|
|
//
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// We need to go backwards from our input point
|
|
//
|
|
while (la++ < 0 && (ANTLR_UINT8*)nextChar > (ANTLR_UINT8*)input->get_data() )
|
|
{
|
|
// Get the previous 16 bit character
|
|
//
|
|
ch = (*nextChar - 2) + ((*nextChar -1) << 8);
|
|
nextChar -= 2;
|
|
|
|
// If we found a low surrogate then go back one more character if
|
|
// the hi surrogate is there
|
|
//
|
|
if (ch >= UNI_SUR_LOW_START && ch <= UNI_SUR_LOW_END)
|
|
{
|
|
ch2 = (*nextChar - 2) + ((*nextChar -1) << 8);
|
|
if (ch2 >= UNI_SUR_HIGH_START && ch2 <= UNI_SUR_HIGH_END)
|
|
{
|
|
// Yes, there is a high surrogate to match it so decrement one more and point to that
|
|
//
|
|
nextChar -=2;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Our local copy of nextChar is now pointing to either the correct character or end of file
|
|
//
|
|
// Input buffer size is always in bytes
|
|
//
|
|
if ( (ANTLR_UINT8*)nextChar >= (((ANTLR_UINT8*)input->get_data()) + input->get_sizeBuf()))
|
|
{
|
|
return ANTLR_CHARSTREAM_EOF;
|
|
}
|
|
else
|
|
{
|
|
// Pick up the next 16 character (little endian byte order)
|
|
//
|
|
ch = (*nextChar) + (*(nextChar+1) << 8);
|
|
nextChar += 2;
|
|
|
|
// If we have a surrogate pair then we need to consume
|
|
// a following valid LO surrogate.
|
|
//
|
|
if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_HIGH_END)
|
|
{
|
|
// If the 16 bits following the high surrogate are in the source buffer...
|
|
//
|
|
if ((ANTLR_UINT8*)(nextChar) < (((ANTLR_UINT8*)input->get_data()) + input->get_sizeBuf()))
|
|
{
|
|
// Next character is in little endian byte order
|
|
//
|
|
ch2 = (*nextChar) + (*(nextChar+1) << 8);
|
|
|
|
// If it's a valid low surrogate, consume it
|
|
//
|
|
if (ch2 >= UNI_SUR_LOW_START && ch2 <= UNI_SUR_LOW_END)
|
|
{
|
|
// Construct the UTF32 code point
|
|
//
|
|
ch = ((ch - UNI_SUR_HIGH_START) << halfShift)
|
|
+ (ch2 - UNI_SUR_LOW_START) + halfBase;
|
|
}
|
|
// Note that we ignore a valid hi surrogate that has no lo surrogate to go with
|
|
// it.
|
|
//
|
|
}
|
|
// Note that we ignore a valid hi surrogate that has no lo surrogate to go with
|
|
// it because the buffer ended
|
|
//
|
|
}
|
|
}
|
|
return ch;
|
|
}
|
|
|
|
template<class ImplTraits, class SuperType>
|
|
ANTLR_UINT32 UTF16_IntStream<ImplTraits, SuperType>::_LA( ANTLR_INT32 la, ClassForwarder<ANTLR_BIG_ENDIAN> )
|
|
{
|
|
SuperType* input;
|
|
UTF32 ch;
|
|
UTF32 ch2;
|
|
ANTLR_UCHAR* nextChar;
|
|
|
|
// Find the input interface and where we are currently pointing to
|
|
// in the input stream
|
|
//
|
|
input = this->get_super();
|
|
nextChar = input->get_nextChar();
|
|
|
|
// If a positive offset then advance forward, else retreat
|
|
//
|
|
if (la >= 0)
|
|
{
|
|
while (--la > 0 && (ANTLR_UINT8*)nextChar < ((ANTLR_UINT8*)input->get_data()) + input->get_sizeBuf() )
|
|
{
|
|
// Advance our copy of the input pointer
|
|
//
|
|
// Next char in Big Endian byte order
|
|
//
|
|
ch = ((*nextChar) << 8) + *(nextChar+1);
|
|
nextChar += 2;
|
|
|
|
// If we have a surrogate pair then we need to consume
|
|
// a following valid LO surrogate.
|
|
//
|
|
if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_HIGH_END)
|
|
{
|
|
// If the 16 bits following the high surrogate are in the source buffer...
|
|
//
|
|
if ((ANTLR_UINT8*)(nextChar) < (((ANTLR_UINT8*)input->get_data()) + input->get_sizeBuf()))
|
|
{
|
|
// Next character is in big endian byte order
|
|
//
|
|
ch2 = ((*nextChar) << 8) + *(nextChar+1);
|
|
|
|
// If it's a valid low surrogate, consume it
|
|
//
|
|
if (ch2 >= UNI_SUR_LOW_START && ch2 <= UNI_SUR_LOW_END)
|
|
{
|
|
// We consumed one 16 bit character
|
|
//
|
|
nextChar += 2;
|
|
}
|
|
// Note that we ignore a valid hi surrogate that has no lo surrogate to go with
|
|
// it.
|
|
//
|
|
}
|
|
// Note that we ignore a valid hi surrogate that has no lo surrogate to go with
|
|
// it because the buffer ended
|
|
//
|
|
}
|
|
// Note that we did not check for an invalid low surrogate here, or that fact that the
|
|
// lo surrogate was missing. We just picked out one 16 bit character unless the character
|
|
// was a valid hi surrogate, in whcih case we consumed two 16 bit characters.
|
|
//
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// We need to go backwards from our input point
|
|
//
|
|
while (la++ < 0 && (ANTLR_UINT8*)nextChar > (ANTLR_UINT8*)input->get_data() )
|
|
{
|
|
// Get the previous 16 bit character
|
|
//
|
|
ch = ((*nextChar - 2) << 8) + (*nextChar -1);
|
|
nextChar -= 2;
|
|
|
|
// If we found a low surrogate then go back one more character if
|
|
// the hi surrogate is there
|
|
//
|
|
if (ch >= UNI_SUR_LOW_START && ch <= UNI_SUR_LOW_END)
|
|
{
|
|
ch2 = ((*nextChar - 2) << 8) + (*nextChar -1);
|
|
if (ch2 >= UNI_SUR_HIGH_START && ch2 <= UNI_SUR_HIGH_END)
|
|
{
|
|
// Yes, there is a high surrogate to match it so decrement one more and point to that
|
|
//
|
|
nextChar -=2;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Our local copy of nextChar is now pointing to either the correct character or end of file
|
|
//
|
|
// Input buffer size is always in bytes
|
|
//
|
|
if ( (ANTLR_UINT8*)nextChar >= (((ANTLR_UINT8*)input->get_data()) + input->get_sizeBuf()))
|
|
{
|
|
return ANTLR_CHARSTREAM_EOF;
|
|
}
|
|
else
|
|
{
|
|
// Pick up the next 16 character (big endian byte order)
|
|
//
|
|
ch = ((*nextChar) << 8) + *(nextChar+1);
|
|
nextChar += 2;
|
|
|
|
// If we have a surrogate pair then we need to consume
|
|
// a following valid LO surrogate.
|
|
//
|
|
if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_HIGH_END)
|
|
{
|
|
// If the 16 bits following the high surrogate are in the source buffer...
|
|
//
|
|
if ((ANTLR_UINT8*)(nextChar) < (((ANTLR_UINT8*)input->get_data()) + input->get_sizeBuf()))
|
|
{
|
|
// Next character is in big endian byte order
|
|
//
|
|
ch2 = ((*nextChar) << 8) + *(nextChar+1);
|
|
|
|
// If it's a valid low surrogate, consume it
|
|
//
|
|
if (ch2 >= UNI_SUR_LOW_START && ch2 <= UNI_SUR_LOW_END)
|
|
{
|
|
// Construct the UTF32 code point
|
|
//
|
|
ch = ((ch - UNI_SUR_HIGH_START) << halfShift)
|
|
+ (ch2 - UNI_SUR_LOW_START) + halfBase;
|
|
}
|
|
// Note that we ignore a valid hi surrogate that has no lo surrogate to go with
|
|
// it.
|
|
//
|
|
}
|
|
// Note that we ignore a valid hi surrogate that has no lo surrogate to go with
|
|
// it because the buffer ended
|
|
//
|
|
}
|
|
}
|
|
return ch;
|
|
}
|
|
|
|
template<class ImplTraits, class SuperType>
|
|
void UTF16_IntStream<ImplTraits, SuperType>::consume( ClassForwarder<BYTE_AGNOSTIC> )
|
|
{
|
|
SuperType* input;
|
|
UTF32 ch;
|
|
UTF32 ch2;
|
|
|
|
input = this->get_super();
|
|
|
|
// Buffer size is always in bytes
|
|
//
|
|
if(input->get_nextChar() < (input->get_data() + input->get_sizeBuf()/2) )
|
|
{
|
|
// Indicate one more character in this line
|
|
//
|
|
input->inc_charPositionInLine();
|
|
|
|
if ((ANTLR_UCHAR)(*(input->get_nextChar())) == input->get_newlineChar())
|
|
{
|
|
// Reset for start of a new line of input
|
|
//
|
|
input->inc_line();
|
|
input->set_charPositionInLine(0);
|
|
input->set_currentLine( input->get_nextChar() + 1 );
|
|
}
|
|
|
|
// Increment to next character position, accounting for any surrogates
|
|
//
|
|
// Next char in natural machine byte order
|
|
//
|
|
ch = *(input->get_nextChar());
|
|
|
|
// We consumed one 16 bit character
|
|
//
|
|
input->set_nextChar( input->get_nextChar() + 1 );
|
|
|
|
// If we have a surrogate pair then we need to consume
|
|
// a following valid LO surrogate.
|
|
//
|
|
if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_HIGH_END) {
|
|
|
|
// If the 16 bits following the high surrogate are in the source buffer...
|
|
//
|
|
if(input->get_nextChar() < (input->get_data() + input->get_sizeBuf()/2) )
|
|
{
|
|
// Next character is in natural machine byte order
|
|
//
|
|
ch2 = *(input->get_nextChar());
|
|
|
|
// If it's a valid low surrogate, consume it
|
|
//
|
|
if (ch2 >= UNI_SUR_LOW_START && ch2 <= UNI_SUR_LOW_END)
|
|
{
|
|
// We consumed one 16 bit character
|
|
//
|
|
input->set_nextChar( input->get_nextChar() + 1 );
|
|
}
|
|
// Note that we ignore a valid hi surrogate that has no lo surrogate to go with
|
|
// it.
|
|
//
|
|
}
|
|
// Note that we ignore a valid hi surrogate that has no lo surrogate to go with
|
|
// it because the buffer ended
|
|
//
|
|
}
|
|
// Note that we did not check for an invalid low surrogate here, or that fact that the
|
|
// lo surrogate was missing. We just picked out one 16 bit character unless the character
|
|
// was a valid hi surrogate, in whcih case we consumed two 16 bit characters.
|
|
//
|
|
}
|
|
|
|
}
|
|
|
|
template<class ImplTraits, class SuperType>
|
|
void UTF16_IntStream<ImplTraits, SuperType>::consume( ClassForwarder<ANTLR_LITTLE_ENDIAN> )
|
|
{
|
|
SuperType* input;
|
|
UTF32 ch;
|
|
UTF32 ch2;
|
|
|
|
input = this->get_super();
|
|
|
|
// Buffer size is always in bytes
|
|
//
|
|
if(input->get_nextChar() < (input->get_data() + input->get_sizeBuf()/2) )
|
|
{
|
|
// Indicate one more character in this line
|
|
//
|
|
input->inc_charPositionInLine();
|
|
|
|
if ((ANTLR_UCHAR)(*(input->get_nextChar())) == input->get_newlineChar())
|
|
{
|
|
// Reset for start of a new line of input
|
|
//
|
|
input->inc_line();
|
|
input->set_charPositionInLine(0);
|
|
input->set_currentLine(input->get_nextChar() + 1);
|
|
}
|
|
|
|
// Increment to next character position, accounting for any surrogates
|
|
//
|
|
// Next char in litle endian form
|
|
//
|
|
ch = *((ANTLR_UINT8*)input->get_nextChar()) + (*((ANTLR_UINT8*)input->get_nextChar() + 1) <<8);
|
|
|
|
// We consumed one 16 bit character
|
|
//
|
|
input->set_nextChar( input->get_nextChar() + 1);
|
|
|
|
// If we have a surrogate pair then we need to consume
|
|
// a following valid LO surrogate.
|
|
//
|
|
if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_HIGH_END)
|
|
{
|
|
// If the 16 bits following the high surrogate are in the source buffer...
|
|
//
|
|
if(input->get_nextChar() < (input->get_data() + input->get_sizeBuf()/2) )
|
|
{
|
|
ch2 = *((ANTLR_UINT8*)input->get_nextChar()) + (*((ANTLR_UINT8*)input->get_nextChar() + 1) <<8);
|
|
|
|
// If it's a valid low surrogate, consume it
|
|
//
|
|
if (ch2 >= UNI_SUR_LOW_START && ch2 <= UNI_SUR_LOW_END)
|
|
{
|
|
// We consumed one 16 bit character
|
|
//
|
|
input->set_nextChar( input->get_nextChar() + 1);
|
|
}
|
|
// Note that we ignore a valid hi surrogate that has no lo surrogate to go with
|
|
// it.
|
|
//
|
|
}
|
|
// Note that we ignore a valid hi surrogate that has no lo surrogate to go with
|
|
// it because the buffer ended
|
|
//
|
|
}
|
|
// Note that we did not check for an invalid low surrogate here, or that fact that the
|
|
// lo surrogate was missing. We just picked out one 16 bit character unless the character
|
|
// was a valid hi surrogate, in whcih case we consumed two 16 bit characters.
|
|
//
|
|
}
|
|
}
|
|
|
|
template<class ImplTraits, class SuperType>
|
|
void UTF16_IntStream<ImplTraits, SuperType>::consume( ClassForwarder<ANTLR_BIG_ENDIAN> )
|
|
{
|
|
SuperType* input;
|
|
UTF32 ch;
|
|
UTF32 ch2;
|
|
|
|
input = this->get_super();
|
|
|
|
// Buffer size is always in bytes
|
|
//
|
|
if(input->get_nextChar() < (input->get_data() + input->get_sizeBuf()/2) )
|
|
{
|
|
// Indicate one more character in this line
|
|
//
|
|
input->inc_charPositionInLine();
|
|
|
|
if ((ANTLR_UCHAR)(*(input->get_nextChar())) == input->get_newlineChar())
|
|
{
|
|
// Reset for start of a new line of input
|
|
//
|
|
input->inc_line();
|
|
input->set_charPositionInLine(0);
|
|
input->set_currentLine(input->get_nextChar() + 1);
|
|
}
|
|
|
|
// Increment to next character position, accounting for any surrogates
|
|
//
|
|
// Next char in big endian form
|
|
//
|
|
ch = *((ANTLR_UINT8*)input->get_nextChar() + 1) + (*((ANTLR_UINT8*)input->get_nextChar() ) <<8);
|
|
|
|
// We consumed one 16 bit character
|
|
//
|
|
input->set_nextChar( input->get_nextChar() + 1);
|
|
|
|
// If we have a surrogate pair then we need to consume
|
|
// a following valid LO surrogate.
|
|
//
|
|
if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_HIGH_END)
|
|
{
|
|
// If the 16 bits following the high surrogate are in the source buffer...
|
|
//
|
|
if(input->get_nextChar() < (input->get_data() + input->get_sizeBuf()/2) )
|
|
{
|
|
// Big endian
|
|
//
|
|
ch2 = *((ANTLR_UINT8*)input->get_nextChar() + 1) + (*((ANTLR_UINT8*)input->get_nextChar() ) <<8);
|
|
|
|
// If it's a valid low surrogate, consume it
|
|
//
|
|
if (ch2 >= UNI_SUR_LOW_START && ch2 <= UNI_SUR_LOW_END)
|
|
{
|
|
// We consumed one 16 bit character
|
|
//
|
|
input->set_nextChar( input->get_nextChar() + 1);
|
|
}
|
|
// Note that we ignore a valid hi surrogate that has no lo surrogate to go with
|
|
// it.
|
|
//
|
|
}
|
|
// Note that we ignore a valid hi surrogate that has no lo surrogate to go with
|
|
// it because the buffer ended
|
|
//
|
|
}
|
|
// Note that we did not check for an invalid low surrogate here, or that fact that the
|
|
// lo surrogate was missing. We just picked out one 16 bit character unless the character
|
|
// was a valid hi surrogate, in whcih case we consumed two 16 bit characters.
|
|
//
|
|
}
|
|
}
|
|
|
|
template<class ImplTraits, class SuperType>
|
|
ANTLR_UINT32 UTF32_IntStream<ImplTraits, SuperType>::_LA( ANTLR_INT32 i)
|
|
{
|
|
return this->_LA( i, ClassForwarder<typename ImplTraits::Endianness>() );
|
|
}
|
|
|
|
template<class ImplTraits, class SuperType>
|
|
ANTLR_MARKER UTF32_IntStream<ImplTraits, SuperType>::index()
|
|
{
|
|
SuperType* input = this->get_super();
|
|
return (ANTLR_MARKER)(input->get_nextChar());
|
|
}
|
|
|
|
template<class ImplTraits, class SuperType>
|
|
void UTF32_IntStream<ImplTraits, SuperType>::seek(ANTLR_MARKER seekPoint)
|
|
{
|
|
SuperType* input;
|
|
|
|
input = this->get_super();
|
|
|
|
// If the requested seek point is less than the current
|
|
// input point, then we assume that we are resetting from a mark
|
|
// and do not need to scan, but can just set to there as rewind will
|
|
// reset line numbers and so on.
|
|
//
|
|
if (seekPoint <= (ANTLR_MARKER)(input->get_nextChar()))
|
|
{
|
|
input->set_nextChar( static_cast<typename ImplTraits::DataType*>(seekPoint) );
|
|
}
|
|
else
|
|
{
|
|
// Call consume until we reach the asked for seek point or EOF
|
|
//
|
|
while( (this->_LA(1) != ANTLR_CHARSTREAM_EOF) && (seekPoint < (ANTLR_MARKER)input->get_nextChar()) )
|
|
{
|
|
this->consume();
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
template<class ImplTraits, class SuperType>
|
|
void UTF32_IntStream<ImplTraits, SuperType>::setupIntStream(bool machineBigEndian, bool inputBigEndian)
|
|
{
|
|
SuperType* super = this->get_super();
|
|
super->set_charByteSize(4);
|
|
|
|
this->findout_endian_spec(machineBigEndian, inputBigEndian);
|
|
}
|
|
|
|
template<class ImplTraits, class SuperType>
|
|
ANTLR_UINT32 UTF32_IntStream<ImplTraits, SuperType>::_LA( ANTLR_INT32 la, ClassForwarder<BYTE_AGNOSTIC> )
|
|
{
|
|
SuperType* input = this->get_super();
|
|
|
|
if (( input->get_nextChar() + la - 1) >= (input->get_data() + input->get_sizeBuf()/4 ))
|
|
{
|
|
return ANTLR_CHARSTREAM_EOF;
|
|
}
|
|
else
|
|
{
|
|
return (ANTLR_UCHAR)(*(input->get_nextChar() + la - 1));
|
|
}
|
|
}
|
|
|
|
template<class ImplTraits, class SuperType>
|
|
ANTLR_UINT32 UTF32_IntStream<ImplTraits, SuperType>::_LA( ANTLR_INT32 la, ClassForwarder<ANTLR_LITTLE_ENDIAN> )
|
|
{
|
|
SuperType* input = this->get_super();
|
|
|
|
if (( input->get_nextChar() + la - 1) >= (input->get_data() + input->get_sizeBuf()/4 ))
|
|
{
|
|
return ANTLR_CHARSTREAM_EOF;
|
|
}
|
|
else
|
|
{
|
|
ANTLR_UCHAR c;
|
|
|
|
c = (ANTLR_UCHAR)(*(input->get_nextChar() + la - 1));
|
|
|
|
// Swap Endianess to Big Endian
|
|
//
|
|
return (c>>24) | ((c<<8) & 0x00FF0000) | ((c>>8) & 0x0000FF00) | (c<<24);
|
|
}
|
|
}
|
|
|
|
template<class ImplTraits, class SuperType>
|
|
ANTLR_UINT32 UTF32_IntStream<ImplTraits, SuperType>::_LA( ANTLR_INT32 la, ClassForwarder<ANTLR_BIG_ENDIAN> )
|
|
{
|
|
SuperType* input = this->get_super();
|
|
|
|
if (( input->get_nextChar() + la - 1) >= (input->get_data() + input->get_sizeBuf()/4 ))
|
|
{
|
|
return ANTLR_CHARSTREAM_EOF;
|
|
}
|
|
else
|
|
{
|
|
ANTLR_UCHAR c;
|
|
|
|
c = (ANTLR_UCHAR)(*(input->get_nextChar() + la - 1));
|
|
|
|
// Swap Endianess to Little Endian
|
|
//
|
|
return (c>>24) | ((c<<8) & 0x00FF0000) | ((c>>8) & 0x0000FF00) | (c<<24);
|
|
}
|
|
}
|
|
|
|
template<class ImplTraits, class SuperType>
|
|
void UTF32_IntStream<ImplTraits, SuperType>::consume()
|
|
{
|
|
SuperType* input = this->get_super();
|
|
|
|
// SizeBuf is always in bytes
|
|
//
|
|
if ( input->get_nextChar() < (input->get_data() + input->get_sizeBuf()/4 ))
|
|
{
|
|
/* Indicate one more character in this line
|
|
*/
|
|
input->inc_charPositionInLine();
|
|
|
|
if ((ANTLR_UCHAR)(*(input->get_nextChar())) == input->get_newlineChar())
|
|
{
|
|
/* Reset for start of a new line of input
|
|
*/
|
|
input->inc_line();
|
|
input->set_charPositionInLine(0);
|
|
input->set_currentLine( input->get_nextChar() + 1 );
|
|
}
|
|
|
|
/* Increment to next character position
|
|
*/
|
|
input->set_nextChar( input->get_nextChar() + 1 );
|
|
}
|
|
}
|
|
|
|
template<class ImplTraits, class SuperType>
|
|
void UTF8_IntStream<ImplTraits, SuperType>::setupIntStream(bool, bool)
|
|
{
|
|
SuperType* super = this->get_super();
|
|
super->set_charByteSize(0);
|
|
}
|
|
|
|
// ------------------------------------------------------
|
|
// Following is from Unicode.org (see antlr3convertutf.c)
|
|
//
|
|
|
|
/// Index into the table below with the first byte of a UTF-8 sequence to
|
|
/// get the number of trailing bytes that are supposed to follow it.
|
|
/// Note that *legal* UTF-8 values can't have 4 or 5-bytes. The table is
|
|
/// left as-is for anyone who may want to do such conversion, which was
|
|
/// allowed in earlier algorithms.
|
|
///
|
|
template<class ImplTraits, class SuperType>
|
|
const ANTLR_UINT32* UTF8_IntStream<ImplTraits, SuperType>::TrailingBytesForUTF8()
|
|
{
|
|
static const ANTLR_UINT32 trailingBytesForUTF8[256] = {
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
|
|
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
|
|
2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, 3,3,3,3,3,3,3,3,4,4,4,4,5,5,5,5
|
|
};
|
|
|
|
return trailingBytesForUTF8;
|
|
}
|
|
|
|
/// Magic values subtracted from a buffer value during UTF8 conversion.
|
|
/// This table contains as many values as there might be trailing bytes
|
|
/// in a UTF-8 sequence.
|
|
///
|
|
template<class ImplTraits, class SuperType>
|
|
const UTF32* UTF8_IntStream<ImplTraits, SuperType>::OffsetsFromUTF8()
|
|
{
|
|
static const UTF32 offsetsFromUTF8[6] =
|
|
{ 0x00000000UL, 0x00003080UL, 0x000E2080UL,
|
|
0x03C82080UL, 0xFA082080UL, 0x82082080UL
|
|
};
|
|
return offsetsFromUTF8;
|
|
}
|
|
|
|
// End of Unicode.org tables
|
|
// -------------------------
|
|
|
|
|
|
/** \brief Consume the next character in a UTF8 input stream
|
|
*
|
|
* \param input Input stream context pointer
|
|
*/
|
|
template<class ImplTraits, class SuperType>
|
|
void UTF8_IntStream<ImplTraits, SuperType>::consume()
|
|
{
|
|
SuperType* input = this->get_super();
|
|
const ANTLR_UINT32* trailingBytesForUTF8 = UTF8_IntStream::TrailingBytesForUTF8();
|
|
const UTF32* offsetsFromUTF8 = UTF8_IntStream::OffsetsFromUTF8();
|
|
|
|
ANTLR_UINT32 extraBytesToRead;
|
|
ANTLR_UCHAR ch;
|
|
ANTLR_UINT8* nextChar;
|
|
|
|
nextChar = input->get_nextChar();
|
|
|
|
if (nextChar < (input->get_data() + input->get_sizeBuf()))
|
|
{
|
|
// Indicate one more character in this line
|
|
//
|
|
input->inc_charPositionInLine();
|
|
|
|
// Are there more bytes needed to make up the whole thing?
|
|
//
|
|
extraBytesToRead = trailingBytesForUTF8[*nextChar];
|
|
|
|
if ((nextChar + extraBytesToRead) >= (input->get_data() + input->get_sizeBuf()))
|
|
{
|
|
input->set_nextChar( input->get_data() + input->get_sizeBuf() );
|
|
return;
|
|
}
|
|
|
|
// Cases deliberately fall through (see note A in antlrconvertutf.c)
|
|
// Legal UTF8 is only 4 bytes but 6 bytes could be used in old UTF8 so
|
|
// we allow it.
|
|
//
|
|
ch = 0;
|
|
switch (extraBytesToRead)
|
|
{
|
|
case 5: ch += *nextChar++; ch <<= 6;
|
|
case 4: ch += *nextChar++; ch <<= 6;
|
|
case 3: ch += *nextChar++; ch <<= 6;
|
|
case 2: ch += *nextChar++; ch <<= 6;
|
|
case 1: ch += *nextChar++; ch <<= 6;
|
|
case 0: ch += *nextChar++;
|
|
}
|
|
|
|
// Magically correct the input value
|
|
//
|
|
ch -= offsetsFromUTF8[extraBytesToRead];
|
|
if (ch == input->get_newlineChar())
|
|
{
|
|
/* Reset for start of a new line of input
|
|
*/
|
|
input->inc_line();
|
|
input->set_charPositionInLine(0);
|
|
input->set_currentLine(nextChar);
|
|
}
|
|
|
|
// Update input pointer
|
|
//
|
|
input->set_nextChar(nextChar);
|
|
}
|
|
}
|
|
|
|
/** \brief Return the input element assuming a UTF8 input
|
|
*
|
|
* \param[in] input Input stream context pointer
|
|
* \param[in] la 1 based offset of next input stream element
|
|
*
|
|
* \return Next input character in internal ANTLR3 encoding (UTF32)
|
|
*/
|
|
template<class ImplTraits, class SuperType>
|
|
ANTLR_UCHAR UTF8_IntStream<ImplTraits, SuperType>::_LA(ANTLR_INT32 la)
|
|
{
|
|
SuperType* input = this->get_super();
|
|
const ANTLR_UINT32* trailingBytesForUTF8 = UTF8_IntStream::TrailingBytesForUTF8();
|
|
const UTF32* offsetsFromUTF8 = UTF8_IntStream::OffsetsFromUTF8();
|
|
ANTLR_UINT32 extraBytesToRead;
|
|
ANTLR_UCHAR ch;
|
|
ANTLR_UINT8* nextChar;
|
|
|
|
nextChar = input->get_nextChar();
|
|
|
|
// Do we need to traverse forwards or backwards?
|
|
// - LA(0) is treated as LA(1) and we assume that the nextChar is
|
|
// already positioned.
|
|
// - LA(n+) ; n>1 means we must traverse forward n-1 characters catering for UTF8 encoding
|
|
// - LA(-n) means we must traverse backwards n chracters
|
|
//
|
|
if (la > 1) {
|
|
|
|
// Make sure that we have at least one character left before trying to
|
|
// loop through the buffer.
|
|
//
|
|
if (nextChar < (input->get_data() + input->get_sizeBuf()))
|
|
{
|
|
// Now traverse n-1 characters forward
|
|
//
|
|
while (--la > 0)
|
|
{
|
|
// Does the next character require trailing bytes?
|
|
// If so advance the pointer by that many bytes as well as advancing
|
|
// one position for what will be at least a single byte character.
|
|
//
|
|
nextChar += trailingBytesForUTF8[*nextChar] + 1;
|
|
|
|
// Does that calculation take us past the byte length of the buffer?
|
|
//
|
|
if (nextChar >= (input->get_data() + input->get_sizeBuf()))
|
|
{
|
|
return ANTLR_CHARSTREAM_EOF;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
return ANTLR_CHARSTREAM_EOF;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// LA is negative so we decrease the pointer by n character positions
|
|
//
|
|
while (nextChar > input->get_data() && la++ < 0)
|
|
{
|
|
// Traversing backwards in UTF8 means decermenting by one
|
|
// then continuing to decrement while ever a character pattern
|
|
// is flagged as being a trailing byte of an encoded code point.
|
|
// Trailing UTF8 bytes always start with 10 in binary. We assumne that
|
|
// the UTF8 is well formed and do not check boundary conditions
|
|
//
|
|
nextChar--;
|
|
while ((*nextChar & 0xC0) == 0x80)
|
|
{
|
|
nextChar--;
|
|
}
|
|
}
|
|
}
|
|
|
|
// nextChar is now pointing at the UTF8 encoded character that we need to
|
|
// decode and return.
|
|
//
|
|
// Are there more bytes needed to make up the whole thing?
|
|
//
|
|
extraBytesToRead = trailingBytesForUTF8[*nextChar];
|
|
if (nextChar + extraBytesToRead >= (input->get_data() + input->get_sizeBuf()))
|
|
{
|
|
return ANTLR_CHARSTREAM_EOF;
|
|
}
|
|
|
|
// Cases deliberately fall through (see note A in antlrconvertutf.c)
|
|
//
|
|
ch = 0;
|
|
switch (extraBytesToRead)
|
|
{
|
|
case 5: ch += *nextChar++; ch <<= 6;
|
|
case 4: ch += *nextChar++; ch <<= 6;
|
|
case 3: ch += *nextChar++; ch <<= 6;
|
|
case 2: ch += *nextChar++; ch <<= 6;
|
|
case 1: ch += *nextChar++; ch <<= 6;
|
|
case 0: ch += *nextChar++;
|
|
}
|
|
|
|
// Magically correct the input value
|
|
//
|
|
ch -= offsetsFromUTF8[extraBytesToRead];
|
|
|
|
return ch;
|
|
}
|
|
|
|
template<class ImplTraits>
|
|
TokenIntStream<ImplTraits>::TokenIntStream()
|
|
{
|
|
m_cachedSize = 0;
|
|
}
|
|
|
|
template<class ImplTraits>
|
|
ANTLR_UINT32 TokenIntStream<ImplTraits>::get_cachedSize() const
|
|
{
|
|
return m_cachedSize;
|
|
}
|
|
|
|
template<class ImplTraits>
|
|
void TokenIntStream<ImplTraits>::set_cachedSize( ANTLR_UINT32 cachedSize )
|
|
{
|
|
m_cachedSize = cachedSize;
|
|
}
|
|
|
|
/** Move the input pointer to the next incoming token. The stream
|
|
* must become active with LT(1) available. consume() simply
|
|
* moves the input pointer so that LT(1) points at the next
|
|
* input symbol. Consume at least one token.
|
|
*
|
|
* Walk past any token not on the channel the parser is listening to.
|
|
*/
|
|
template<class ImplTraits>
|
|
void TokenIntStream<ImplTraits>::consume()
|
|
{
|
|
TokenStreamType* cts = static_cast<TokenStreamType*>(this);
|
|
|
|
if((ANTLR_UINT32)cts->get_p() < m_cachedSize )
|
|
{
|
|
cts->inc_p();
|
|
cts->set_p( cts->skipOffTokenChannels(cts->get_p()) );
|
|
}
|
|
}
|
|
template<class ImplTraits>
|
|
void TokenIntStream<ImplTraits>::consumeInitialHiddenTokens()
|
|
{
|
|
ANTLR_MARKER first;
|
|
ANTLR_INT32 i;
|
|
TokenStreamType* ts;
|
|
|
|
ts = this->get_super();
|
|
first = this->index();
|
|
|
|
for (i=0; i<first; i++)
|
|
{
|
|
ts->get_debugger()->consumeHiddenToken(ts->get(i));
|
|
}
|
|
|
|
ts->set_initialStreamState(false);
|
|
}
|
|
|
|
|
|
template<class ImplTraits>
|
|
ANTLR_UINT32 TokenIntStream<ImplTraits>::_LA( ANTLR_INT32 i )
|
|
{
|
|
const CommonTokenType* tok;
|
|
TokenStreamType* ts = static_cast<TokenStreamType*>(this);
|
|
|
|
tok = ts->_LT(i);
|
|
|
|
if (tok != NULL)
|
|
{
|
|
return tok->get_type();
|
|
}
|
|
else
|
|
{
|
|
return CommonTokenType::TOKEN_INVALID;
|
|
}
|
|
|
|
}
|
|
|
|
template<class ImplTraits>
|
|
ANTLR_MARKER TokenIntStream<ImplTraits>::mark()
|
|
{
|
|
BaseType::m_lastMarker = this->index();
|
|
return BaseType::m_lastMarker;
|
|
}
|
|
|
|
template<class ImplTraits>
|
|
ANTLR_UINT32 TokenIntStream<ImplTraits>::size()
|
|
{
|
|
if (this->get_cachedSize() > 0)
|
|
{
|
|
return this->get_cachedSize();
|
|
}
|
|
TokenStreamType* cts = this->get_super();
|
|
|
|
this->set_cachedSize( static_cast<ANTLR_UINT32>(cts->get_tokens().size()) );
|
|
return this->get_cachedSize();
|
|
}
|
|
|
|
template<class ImplTraits>
|
|
void TokenIntStream<ImplTraits>::release()
|
|
{
|
|
return;
|
|
}
|
|
|
|
template<class ImplTraits>
|
|
ANTLR_MARKER TokenIntStream<ImplTraits>::tindex()
|
|
{
|
|
return this->get_super()->get_p();
|
|
}
|
|
|
|
template<class ImplTraits>
|
|
void TokenIntStream<ImplTraits>::rewindLast()
|
|
{
|
|
this->rewind( this->get_lastMarker() );
|
|
}
|
|
|
|
template<class ImplTraits>
|
|
void TokenIntStream<ImplTraits>::rewind(ANTLR_MARKER marker)
|
|
{
|
|
return this->seek(marker);
|
|
}
|
|
|
|
template<class ImplTraits>
|
|
void TokenIntStream<ImplTraits>::seek(ANTLR_MARKER index)
|
|
{
|
|
TokenStreamType* cts = static_cast<TokenStreamType*>(this);
|
|
|
|
cts->set_p( static_cast<ANTLR_INT32>(index) );
|
|
}
|
|
|
|
|
|
/// Return a string that represents the name assoicated with the input source
|
|
///
|
|
/// /param[in] is The ANTLR3_INT_STREAM interface that is representing this token stream.
|
|
///
|
|
/// /returns
|
|
/// /implements ANTLR3_INT_STREAM_struct::getSourceName()
|
|
///
|
|
template<class ImplTraits>
|
|
typename TokenIntStream<ImplTraits>::StringType
|
|
TokenIntStream<ImplTraits>::getSourceName()
|
|
{
|
|
// Slightly convoluted as we must trace back to the lexer's input source
|
|
// via the token source. The streamName that is here is not initialized
|
|
// because this is a token stream, not a file or string stream, which are the
|
|
// only things that have a context for a source name.
|
|
//
|
|
return this->get_super()->get_tokenSource()->get_fileName();
|
|
}
|
|
|
|
template<class ImplTraits>
|
|
void TreeNodeIntStream<ImplTraits>::consume()
|
|
{
|
|
CommonTreeNodeStreamType* ctns = this->get_super();
|
|
if( ctns->get_p() == -1 )
|
|
ctns->fillBufferRoot();
|
|
ctns->inc_p();
|
|
}
|
|
template<class ImplTraits>
|
|
ANTLR_MARKER TreeNodeIntStream<ImplTraits>::tindex()
|
|
{
|
|
CommonTreeNodeStreamType* ctns = this->get_super();
|
|
return (ANTLR_MARKER)(ctns->get_p());
|
|
}
|
|
|
|
template<class ImplTraits>
|
|
ANTLR_UINT32 TreeNodeIntStream<ImplTraits>::_LA(ANTLR_INT32 i)
|
|
{
|
|
CommonTreeNodeStreamType* tns = this->get_super();
|
|
|
|
// Ask LT for the 'token' at that position
|
|
//
|
|
TreeType* t = tns->_LT(i);
|
|
|
|
if (t == NULL)
|
|
{
|
|
return CommonTokenType::TOKEN_INVALID;
|
|
}
|
|
|
|
// Token node was there so return the type of it
|
|
//
|
|
return t->get_type();
|
|
}
|
|
|
|
template<class ImplTraits>
|
|
ANTLR_MARKER TreeNodeIntStream<ImplTraits>::mark()
|
|
{
|
|
CommonTreeNodeStreamType* ctns = this->get_super();
|
|
|
|
if (ctns->get_p() == -1)
|
|
{
|
|
ctns->fillBufferRoot();
|
|
}
|
|
|
|
// Return the current mark point
|
|
//
|
|
this->set_lastMarker( this->index() );
|
|
|
|
return this->get_lastMarker();
|
|
|
|
}
|
|
|
|
template<class ImplTraits>
|
|
void TreeNodeIntStream<ImplTraits>::release(ANTLR_MARKER marker)
|
|
{
|
|
|
|
}
|
|
|
|
template<class ImplTraits>
|
|
void TreeNodeIntStream<ImplTraits>::rewindMark(ANTLR_MARKER marker)
|
|
{
|
|
this->seek(marker);
|
|
}
|
|
|
|
template<class ImplTraits>
|
|
void TreeNodeIntStream<ImplTraits>::rewindLast()
|
|
{
|
|
this->seek( this->get_lastMarker() );
|
|
}
|
|
|
|
template<class ImplTraits>
|
|
void TreeNodeIntStream<ImplTraits>::seek(ANTLR_MARKER index)
|
|
{
|
|
CommonTreeNodeStreamType* ctns = this->get_super();
|
|
ctns->set_p( ANTLR_UINT32_CAST(index) );
|
|
}
|
|
|
|
template<class ImplTraits>
|
|
ANTLR_UINT32 TreeNodeIntStream<ImplTraits>::size()
|
|
{
|
|
CommonTreeNodeStreamType* ctns = this->get_super();
|
|
|
|
if (ctns->get_p() == -1)
|
|
{
|
|
ctns->fillBufferRoot();
|
|
}
|
|
|
|
return ctns->get_nodes().size();
|
|
}
|
|
|
|
|
|
ANTLR_END_NAMESPACE()
|