| ANTLR_BEGIN_NAMESPACE() |
| |
| template<class ImplTraits, class SuperType> |
| ANTLR_INLINE IntStream<ImplTraits, SuperType>::IntStream() |
| { |
| m_lastMarker = 0; |
| m_upper_case = false; |
| } |
| |
| template<class ImplTraits, class SuperType> |
| ANTLR_INLINE typename IntStream<ImplTraits, SuperType>::StringType IntStream<ImplTraits, SuperType>::getSourceName() |
| { |
| return m_streamName; |
| } |
| |
| template<class ImplTraits, class SuperType> |
| ANTLR_INLINE typename IntStream<ImplTraits, SuperType>::StringType& IntStream<ImplTraits, SuperType>::get_streamName() |
| { |
| return m_streamName; |
| } |
| |
| template<class ImplTraits, class SuperType> |
| ANTLR_INLINE const typename IntStream<ImplTraits, SuperType>::StringType& IntStream<ImplTraits, SuperType>::get_streamName() const |
| { |
| return m_streamName; |
| } |
| |
| template<class ImplTraits, class SuperType> |
| ANTLR_INLINE ANTLR_MARKER IntStream<ImplTraits, SuperType>::get_lastMarker() const |
| { |
| return m_lastMarker; |
| } |
| |
| template<class ImplTraits, class SuperType> |
| ANTLR_INLINE void IntStream<ImplTraits, SuperType>::setUcaseLA(bool flag) |
| { |
| m_upper_case = flag; |
| } |
| |
| template<class ImplTraits, class SuperType> |
| ANTLR_INLINE SuperType* IntStream<ImplTraits, SuperType>::get_super() |
| { |
| return static_cast<SuperType*>(this); |
| } |
| |
| template<class ImplTraits, class SuperType> |
| void IntStream<ImplTraits, SuperType>::consume() |
| { |
| SuperType* input = this->get_super(); |
| |
| const ANTLR_UINT8* nextChar = input->get_nextChar(); |
| const ANTLR_UINT8* data = input->get_data(); |
| ANTLR_UINT32 sizeBuf = input->get_sizeBuf(); |
| |
| if ( nextChar < ( data + sizeBuf ) ) |
| { |
| /* Indicate one more character in this line |
| */ |
| input->inc_charPositionInLine(); |
| |
| if ((ANTLR_UCHAR)(*(nextChar)) == input->get_newlineChar() ) |
| { |
| /* Reset for start of a new line of input |
| */ |
| input->inc_line(); |
| input->set_charPositionInLine(0); |
| input->set_currentLine(nextChar + 1); |
| } |
| |
| /* Increment to next character position |
| */ |
| input->set_nextChar( nextChar + 1 ); |
| } |
| } |
| |
| template<class ImplTraits, class SuperType> |
| ANTLR_UINT32 IntStream<ImplTraits, SuperType>::_LA( ANTLR_INT32 la ) |
| { |
| SuperType* input = this->get_super(); |
| const ANTLR_UINT8* nextChar = input->get_nextChar(); |
| const ANTLR_UINT8* data = input->get_data(); |
| ANTLR_UINT32 sizeBuf = input->get_sizeBuf(); |
| |
| if (( nextChar + la - 1) >= (data + sizeBuf)) |
| { |
| return ANTLR_CHARSTREAM_EOF; |
| } |
| else |
| { |
| if( !m_upper_case ) |
| return (ANTLR_UCHAR)(*(nextChar + la - 1)); |
| else |
| return (ANTLR_UCHAR)toupper(*(nextChar + la - 1)); |
| } |
| } |
| |
| template<class ImplTraits, class SuperType> |
| ANTLR_MARKER IntStream<ImplTraits, SuperType>::mark() |
| { |
| LexState<ImplTraits>* state; |
| SuperType* input = this->get_super(); |
| |
| /* New mark point |
| */ |
| input->inc_markDepth(); |
| |
| /* See if we are revisiting a mark as we can just reuse the vector |
| * entry if we are, otherwise, we need a new one |
| */ |
| if (input->get_markDepth() > input->get_markers().size() ) |
| { |
| input->get_markers().push_back( LexState<ImplTraits>() ); |
| LexState<ImplTraits>& state_r = input->get_markers().back(); |
| state = &state_r; |
| } |
| else |
| { |
| LexState<ImplTraits>& state_r = input->get_markers().at( input->get_markDepth() - 1 ); |
| state = &state_r; |
| |
| /* Assume no errors for speed, it will just blow up if the table failed |
| * for some reasons, hence lots of unit tests on the tables ;-) |
| */ |
| } |
| |
| /* We have created or retrieved the state, so update it with the current |
| * elements of the lexer state. |
| */ |
| state->set_charPositionInLine( input->get_charPositionInLine() ); |
| state->set_currentLine( input->get_currentLine() ); |
| state->set_line( input->get_line() ); |
| state->set_nextChar( input->get_nextChar() ); |
| |
| m_lastMarker = input->get_markDepth(); |
| |
| /* And that's it |
| */ |
| return input->get_markDepth(); |
| } |
| |
| template<class ImplTraits, class SuperType> |
| ANTLR_MARKER IntStream<ImplTraits, SuperType>::index() |
| { |
| SuperType* input = this->get_super(); |
| return input->index_impl(); |
| } |
| |
| template<class ImplTraits, class SuperType> |
| void IntStream<ImplTraits, SuperType>::rewind(ANTLR_MARKER mark) |
| { |
| SuperType* input = this->get_super(); |
| |
| /* Perform any clean up of the marks |
| */ |
| this->release(mark); |
| |
| /* Find the supplied mark state |
| */ |
| ANTLR_UINT32 idx = static_cast<ANTLR_UINT32>( mark-1 ); |
| typename ImplTraits::LexStateType& state = input->get_markers().at( idx ); |
| |
| /* Seek input pointer to the requested point (note we supply the void *pointer |
| * to whatever is implementing the int stream to seek). |
| */ |
| this->seek( (ANTLR_MARKER)state.get_nextChar() ); |
| |
| /* Reset to the reset of the information in the mark |
| */ |
| input->set_charPositionInLine( state.get_charPositionInLine() ); |
| input->set_currentLine( state.get_currentLine() ); |
| input->set_line( state.get_line() ); |
| input->set_nextChar( state.get_nextChar() ); |
| |
| /* And we are done |
| */ |
| } |
| |
| template<class ImplTraits, class SuperType> |
| void IntStream<ImplTraits, SuperType>::rewindLast() |
| { |
| this->rewind(m_lastMarker); |
| } |
| |
| template<class ImplTraits, class SuperType> |
| void IntStream<ImplTraits, SuperType>::release(ANTLR_MARKER mark) |
| { |
| SuperType* input = this->get_super(); |
| |
| /* We don't do much here in fact as we never free any higher marks in |
| * the hashtable as we just resuse any memory allocated for them. |
| */ |
| input->set_markDepth( (ANTLR_UINT32)(mark - 1) ); |
| |
| } |
| |
| template<class ImplTraits, class SuperType> |
| void IntStream<ImplTraits, SuperType>::setupIntStream(bool, bool) |
| { |
| } |
| |
| template<class ImplTraits, class SuperType> |
| void IntStream<ImplTraits, SuperType>::seek(ANTLR_MARKER seekPoint) |
| { |
| ANTLR_INT32 count; |
| SuperType* input = this->get_super(); |
| |
| ANTLR_MARKER nextChar = (ANTLR_MARKER) input->get_nextChar(); |
| /* 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. |
| */ |
| if (seekPoint <= nextChar) |
| { |
| input->set_nextChar((ANTLR_UINT8*) seekPoint); |
| } |
| else |
| { |
| count = (ANTLR_UINT32)(seekPoint - nextChar); |
| |
| while (count--) |
| { |
| this->consume(); |
| } |
| } |
| } |
| |
| template<class ImplTraits, class SuperType> |
| IntStream<ImplTraits, SuperType>::~IntStream() |
| { |
| } |
| |
| template<class ImplTraits, class SuperType> |
| ANTLR_UINT32 EBCDIC_IntStream<ImplTraits, SuperType>::_LA( ANTLR_INT32 la) |
| { |
| // EBCDIC to ASCII conversion table |
| // |
| // This for EBCDIC EDF04 translated to ISO-8859.1 which is the usually accepted POSIX |
| // translation and the character tables are published all over the interweb. |
| // |
| const ANTLR_UCHAR e2a[256] = |
| { |
| 0x00, 0x01, 0x02, 0x03, 0x85, 0x09, 0x86, 0x7f, |
| 0x87, 0x8d, 0x8e, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, |
| 0x10, 0x11, 0x12, 0x13, 0x8f, 0x0a, 0x08, 0x97, |
| 0x18, 0x19, 0x9c, 0x9d, 0x1c, 0x1d, 0x1e, 0x1f, |
| 0x80, 0x81, 0x82, 0x83, 0x84, 0x92, 0x17, 0x1b, |
| 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x05, 0x06, 0x07, |
| 0x90, 0x91, 0x16, 0x93, 0x94, 0x95, 0x96, 0x04, |
| 0x98, 0x99, 0x9a, 0x9b, 0x14, 0x15, 0x9e, 0x1a, |
| 0x20, 0xa0, 0xe2, 0xe4, 0xe0, 0xe1, 0xe3, 0xe5, |
| 0xe7, 0xf1, 0x60, 0x2e, 0x3c, 0x28, 0x2b, 0x7c, |
| 0x26, 0xe9, 0xea, 0xeb, 0xe8, 0xed, 0xee, 0xef, |
| 0xec, 0xdf, 0x21, 0x24, 0x2a, 0x29, 0x3b, 0x9f, |
| 0x2d, 0x2f, 0xc2, 0xc4, 0xc0, 0xc1, 0xc3, 0xc5, |
| 0xc7, 0xd1, 0x5e, 0x2c, 0x25, 0x5f, 0x3e, 0x3f, |
| 0xf8, 0xc9, 0xca, 0xcb, 0xc8, 0xcd, 0xce, 0xcf, |
| 0xcc, 0xa8, 0x3a, 0x23, 0x40, 0x27, 0x3d, 0x22, |
| 0xd8, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, |
| 0x68, 0x69, 0xab, 0xbb, 0xf0, 0xfd, 0xfe, 0xb1, |
| 0xb0, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0x70, |
| 0x71, 0x72, 0xaa, 0xba, 0xe6, 0xb8, 0xc6, 0xa4, |
| 0xb5, 0xaf, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, |
| 0x79, 0x7a, 0xa1, 0xbf, 0xd0, 0xdd, 0xde, 0xae, |
| 0xa2, 0xa3, 0xa5, 0xb7, 0xa9, 0xa7, 0xb6, 0xbc, |
| 0xbd, 0xbe, 0xac, 0x5b, 0x5c, 0x5d, 0xb4, 0xd7, |
| 0xf9, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, |
| 0x48, 0x49, 0xad, 0xf4, 0xf6, 0xf2, 0xf3, 0xf5, |
| 0xa6, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, 0x50, |
| 0x51, 0x52, 0xb9, 0xfb, 0xfc, 0xdb, 0xfa, 0xff, |
| 0xd9, 0xf7, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, |
| 0x59, 0x5a, 0xb2, 0xd4, 0xd6, 0xd2, 0xd3, 0xd5, |
| 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, |
| 0x38, 0x39, 0xb3, 0x7b, 0xdc, 0x7d, 0xda, 0x7e |
| }; |
| |
| SuperType* input = this->get_super(); |
| |
| if (( input->get_nextChar() + la - 1) >= ( input->get_data() + input->get_sizeBuf() )) |
| { |
| return ANTLR_CHARSTREAM_EOF; |
| } |
| else |
| { |
| // Translate the required character via the constant conversion table |
| // |
| return e2a[(*(input->get_nextChar() + la - 1))]; |
| } |
| } |
| |
| template<class ImplTraits, class SuperType> |
| void EBCDIC_IntStream<ImplTraits, SuperType>::setupIntStream() |
| { |
| SuperType* super = this->get_super(); |
| super->set_charByteSize(1); |
| } |
| |
| template<class ImplTraits, class SuperType> |
| ANTLR_UINT32 UTF16_IntStream<ImplTraits, SuperType>::_LA( ANTLR_INT32 i) |
| { |
| return this->_LA(i, ClassForwarder< typename ImplTraits::Endianness >() ); |
| } |
| |
| template<class ImplTraits, class SuperType> |
| void UTF16_IntStream<ImplTraits, SuperType>::consume() |
| { |
| this->consume( ClassForwarder< typename ImplTraits::Endianness >() ); |
| } |
| |
| template<class ImplTraits, class SuperType> |
| ANTLR_MARKER UTF16_IntStream<ImplTraits, SuperType>::index() |
| { |
| SuperType* input = this->get_super(); |
| return (ANTLR_MARKER)(input->get_nextChar()); |
| } |
| |
| template<class ImplTraits, class SuperType> |
| void UTF16_IntStream<ImplTraits, SuperType>::seek(ANTLR_MARKER seekPoint) |
| { |
| SuperType* 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( 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 IntStream<ImplTraits, SuperType>::findout_endian_spec(bool machineBigEndian, bool inputBigEndian) |
| { |
| // We must install different UTF16 routines according to whether the input |
| // is the same endianess as the machine we are executing upon or not. If it is not |
| // then we must install methods that can convert the endianess on the fly as they go |
| // |
| |
| if(machineBigEndian == true) |
| { |
| // Machine is Big Endian, if the input is also then install the |
| // methods that do not access input by bytes and reverse them. |
| // Otherwise install endian aware methods. |
| // |
| if (inputBigEndian == true) |
| { |
| // Input is machine compatible |
| // |
| m_endian_spec = 1; |
| } |
| else |
| { |
| // Need to use methods that know that the input is little endian |
| // |
| m_endian_spec = 2; |
| } |
| } |
| else |
| { |
| // Machine is Little Endian, if the input is also then install the |
| // methods that do not access input by bytes and reverse them. |
| // Otherwise install endian aware methods. |
| // |
| if (inputBigEndian == false) |
| { |
| // Input is machine compatible |
| // |
| m_endian_spec = 1; |
| } |
| else |
| { |
| // Need to use methods that know that the input is Big Endian |
| // |
| m_endian_spec = 3; |
| } |
| } |
| } |
| |
| template<class ImplTraits, class SuperType> |
| void UTF16_IntStream<ImplTraits, SuperType>::setupIntStream(bool machineBigEndian, bool inputBigEndian) |
| { |
| SuperType* super = this->get_super(); |
| super->set_charByteSize(2); |
| |
| this->findout_endian_spec( machineBigEndian, inputBigEndian ); |
| } |
| |
| template<class ImplTraits, class SuperType> |
| ANTLR_UINT32 IntStream<ImplTraits, SuperType>::_LA( ANTLR_INT32 i, ClassForwarder<RESOLVE_ENDIAN_AT_RUNTIME> ) |
| { |
| assert( (m_endian_spec >= 1) && (m_endian_spec <= 3)); |
| switch(m_endian_spec) |
| { |
| case 1: |
| return this->_LA(i, ClassForwarder<BYTE_AGNOSTIC>() ); |
| break; |
| case 2: |
| return this->_LA(i, ClassForwarder<ANTLR_LITTLE_ENDIAN>() ); |
| break; |
| case 3: |
| return this->_LA(i, ClassForwarder<ANTLR_BIG_ENDIAN>() ); |
| break; |
| default: |
| break; |
| } |
| return 0; |
| } |
| |
| template<class ImplTraits, class SuperType> |
| void IntStream<ImplTraits, SuperType>::consume( ClassForwarder<RESOLVE_ENDIAN_AT_RUNTIME> ) |
| { |
| assert( (m_endian_spec >= 1) && (m_endian_spec <= 3)); |
| switch(m_endian_spec) |
| { |
| case 1: |
| this->consume( ClassForwarder<BYTE_AGNOSTIC>() ); |
| break; |
| case 2: |
| this->consume( ClassForwarder<ANTLR_LITTLE_ENDIAN>() ); |
| break; |
| case 3: |
| this->consume( ClassForwarder<ANTLR_BIG_ENDIAN>() ); |
| break; |
| default: |
| break; |
| } |
| } |
| |
| template<class ImplTraits, class SuperType> |
| ANTLR_UINT32 UTF16_IntStream<ImplTraits, SuperType>::_LA( ANTLR_INT32 la, ClassForwarder<BYTE_AGNOSTIC> ) |
| { |
| SuperType* input; |
| UTF32 ch; |
| UTF32 ch2; |
| UTF16* 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 natural 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) |
| { |
| // 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() |
