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Diffstat (limited to 'impl/antlr/libantlr3c-3.4/src/antlr3inputstream.c')
| -rw-r--r-- | impl/antlr/libantlr3c-3.4/src/antlr3inputstream.c | 2050 |
1 files changed, 0 insertions, 2050 deletions
diff --git a/impl/antlr/libantlr3c-3.4/src/antlr3inputstream.c b/impl/antlr/libantlr3c-3.4/src/antlr3inputstream.c deleted file mode 100644 index e3f1c26..0000000 --- a/impl/antlr/libantlr3c-3.4/src/antlr3inputstream.c +++ /dev/null @@ -1,2050 +0,0 @@ -/// \file -/// Base functions to initialize and manipulate any input stream -/// - -// [The "BSD licence"] -// Copyright (c) 2005-2009 Jim Idle, Temporal Wave LLC -// http://www.temporal-wave.com -// http://www.linkedin.com/in/jimidle -// -// All rights reserved. -// -// Redistribution and use in source and binary forms, with or without -// modification, are permitted provided that the following conditions -// are met: -// 1. Redistributions of source code must retain the above copyright -// notice, this list of conditions and the following disclaimer. -// 2. Redistributions in binary form must reproduce the above copyright -// notice, this list of conditions and the following disclaimer in the -// documentation and/or other materials provided with the distribution. -// 3. The name of the author may not be used to endorse or promote products -// derived from this software without specific prior written permission. -// -// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR -// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES -// OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. -// IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, -// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT -// NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, -// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY -// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT -// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF -// THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - -#include <antlr3input.h> - -// ----------------------------------- -// Generic 8 bit input such as latin-1 -// - -// 8Bit INT Stream API -// -static void antlr38BitConsume (pANTLR3_INT_STREAM is); -static ANTLR3_UCHAR antlr38BitLA (pANTLR3_INT_STREAM is, ANTLR3_INT32 la); -static ANTLR3_UCHAR antlr38BitLA_ucase (pANTLR3_INT_STREAM is, ANTLR3_INT32 la); -static ANTLR3_MARKER antlr38BitIndex (pANTLR3_INT_STREAM is); -static ANTLR3_MARKER antlr38BitMark (pANTLR3_INT_STREAM is); -static void antlr38BitRewind (pANTLR3_INT_STREAM is, ANTLR3_MARKER mark); -static void antlr38BitRewindLast (pANTLR3_INT_STREAM is); -static void antlr38BitRelease (pANTLR3_INT_STREAM is, ANTLR3_MARKER mark); -static void antlr38BitSeek (pANTLR3_INT_STREAM is, ANTLR3_MARKER seekPoint); -static pANTLR3_STRING antlr38BitGetSourceName (pANTLR3_INT_STREAM is); - -// 8Bit Charstream API functions -// -static void antlr3InputClose (pANTLR3_INPUT_STREAM input); -static void antlr3InputReset (pANTLR3_INPUT_STREAM input); -static void antlr38BitReuse (pANTLR3_INPUT_STREAM input, pANTLR3_UINT8 inString, ANTLR3_UINT32 size, pANTLR3_UINT8 name); -static void * antlr38BitLT (pANTLR3_INPUT_STREAM input, ANTLR3_INT32 lt); -static ANTLR3_UINT32 antlr38BitSize (pANTLR3_INPUT_STREAM input); -static pANTLR3_STRING antlr38BitSubstr (pANTLR3_INPUT_STREAM input, ANTLR3_MARKER start, ANTLR3_MARKER stop); -static ANTLR3_UINT32 antlr38BitGetLine (pANTLR3_INPUT_STREAM input); -static void * antlr38BitGetLineBuf (pANTLR3_INPUT_STREAM input); -static ANTLR3_UINT32 antlr38BitGetCharPosition (pANTLR3_INPUT_STREAM input); -static void antlr38BitSetLine (pANTLR3_INPUT_STREAM input, ANTLR3_UINT32 line); -static void antlr38BitSetCharPosition (pANTLR3_INPUT_STREAM input, ANTLR3_UINT32 position); -static void antlr38BitSetNewLineChar (pANTLR3_INPUT_STREAM input, ANTLR3_UINT32 newlineChar); -static void antlr38BitSetUcaseLA (pANTLR3_INPUT_STREAM input, ANTLR3_BOOLEAN flag); - -// ----------------------------------- -// UTF16 (also covers UCS2) -// -// INT Stream API -// -static void antlr3UTF16Consume (pANTLR3_INT_STREAM is); -static ANTLR3_UCHAR antlr3UTF16LA (pANTLR3_INT_STREAM is, ANTLR3_INT32 la); -static void antlr3UTF16ConsumeLE (pANTLR3_INT_STREAM is); -static ANTLR3_UCHAR antlr3UTF16LALE (pANTLR3_INT_STREAM is, ANTLR3_INT32 la); -static void antlr3UTF16ConsumeBE (pANTLR3_INT_STREAM is); -static ANTLR3_UCHAR antlr3UTF16LABE (pANTLR3_INT_STREAM is, ANTLR3_INT32 la); -static ANTLR3_MARKER antlr3UTF16Index (pANTLR3_INT_STREAM is); -static void antlr3UTF16Seek (pANTLR3_INT_STREAM is, ANTLR3_MARKER seekPoint); - -// UTF16 Charstream API functions -// -static pANTLR3_STRING antlr3UTF16Substr (pANTLR3_INPUT_STREAM input, ANTLR3_MARKER start, ANTLR3_MARKER stop); - -// ----------------------------------- -// UTF32 (also covers UCS2) -// -// INT Stream API -// -static void antlr3UTF32Consume (pANTLR3_INT_STREAM is); -static ANTLR3_UCHAR antlr3UTF32LA (pANTLR3_INT_STREAM is, ANTLR3_INT32 la); -static ANTLR3_UCHAR antlr3UTF32LALE (pANTLR3_INT_STREAM is, ANTLR3_INT32 la); -static ANTLR3_UCHAR antlr3UTF32LABE (pANTLR3_INT_STREAM is, ANTLR3_INT32 la); -static ANTLR3_MARKER antlr3UTF32Index (pANTLR3_INT_STREAM is); -static void antlr3UTF32Seek (pANTLR3_INT_STREAM is, ANTLR3_MARKER seekPoint); - -// UTF16 Charstream API functions -// -static pANTLR3_STRING antlr3UTF32Substr (pANTLR3_INPUT_STREAM input, ANTLR3_MARKER start, ANTLR3_MARKER stop); - -// ------------------------------------ -// UTF-8 -// -static void antlr3UTF8Consume (pANTLR3_INT_STREAM is); -static ANTLR3_UCHAR antlr3UTF8LA (pANTLR3_INT_STREAM is, ANTLR3_INT32 la); - -// ------------------------------------ -// EBCDIC -// -static ANTLR3_UCHAR antlr3EBCDICLA (pANTLR3_INT_STREAM is, ANTLR3_INT32 la); - -/// \brief Common function to setup function interface for an 8 bit input stream. -/// -/// \param input Input stream context pointer -/// -/// \remark -/// - Many of the 8 bit oriented file stream handling functions will be usable -/// by any or at least some, other input streams. Therefore it is perfectly acceptable -/// to call this function to install the 8Bit handler then override just those functions -/// that would not work for the particular input encoding, such as consume for instance. -/// -void -antlr38BitSetupStream (pANTLR3_INPUT_STREAM input) -{ - // Build a string factory for this stream - // - input->strFactory = antlr3StringFactoryNew(input->encoding); - - // Default stream API set up is for 8Bit, so we are done - // -} - -void -antlr3GenericSetupStream (pANTLR3_INPUT_STREAM input) -{ - /* Install function pointers for an 8 bit input - */ - - /* Allocate stream interface - */ - input->istream = antlr3IntStreamNew(); - input->istream->type = ANTLR3_CHARSTREAM; - input->istream->super = input; - - /* Intstream API - */ - input->istream->consume = antlr38BitConsume; // Consume the next 8 bit character in the buffer - input->istream->_LA = antlr38BitLA; // Return the UTF32 character at offset n (1 based) - input->istream->index = antlr38BitIndex; // Current index (offset from first character - input->istream->mark = antlr38BitMark; // Record the current lex state for later restore - input->istream->rewind = antlr38BitRewind; // How to rewind the input - input->istream->rewindLast = antlr38BitRewindLast; // How to rewind the input - input->istream->seek = antlr38BitSeek; // How to seek to a specific point in the stream - input->istream->release = antlr38BitRelease; // Reset marks after mark n - input->istream->getSourceName = antlr38BitGetSourceName; // Return a string that names the input source - - /* Charstream API - */ - input->close = antlr3InputClose; // Close down the stream completely - input->free = antlr3InputClose; // Synonym for free - input->reset = antlr3InputReset; // Reset input to start - input->reuse = antlr38BitReuse; // Install a new input string and reset - input->_LT = antlr38BitLT; // Same as _LA for 8 bit file - input->size = antlr38BitSize; // Return the size of the input buffer - input->substr = antlr38BitSubstr; // Return a string from the input stream - input->getLine = antlr38BitGetLine; // Return the current line number in the input stream - input->getLineBuf = antlr38BitGetLineBuf; // Return a pointer to the start of the current line being consumed - input->getCharPositionInLine = antlr38BitGetCharPosition; // Return the offset into the current line of input - input->setLine = antlr38BitSetLine; // Set the input stream line number (does not set buffer pointers) - input->setCharPositionInLine = antlr38BitSetCharPosition; // Set the offset in to the current line (does not set any pointers) - input->SetNewLineChar = antlr38BitSetNewLineChar; // Set the value of the newline trigger character - input->setUcaseLA = antlr38BitSetUcaseLA; // Changes the LA function to return upper case always - - input->charByteSize = 1; // Size in bytes of characters in this stream. - - /* Initialize entries for tables etc - */ - input->markers = NULL; - - /* Set up the input stream brand new - */ - input->reset(input); - - /* Install default line separator character (it can be replaced - * by the grammar programmer later) - */ - input->SetNewLineChar(input, (ANTLR3_UCHAR)'\n'); -} - -static pANTLR3_STRING -antlr38BitGetSourceName(pANTLR3_INT_STREAM is) -{ - return is->streamName; -} - -/** \brief Close down an input stream and free any memory allocated by it. - * - * \param input Input stream context pointer - */ -static void -antlr3InputClose(pANTLR3_INPUT_STREAM input) -{ - // Close any markers in the input stream - // - if (input->markers != NULL) - { - input->markers->free(input->markers); - input->markers = NULL; - } - - // Close the string factory - // - if (input->strFactory != NULL) - { - input->strFactory->close(input->strFactory); - } - - // Free the input stream buffer if we allocated it - // - if (input->isAllocated && input->data != NULL) - { - ANTLR3_FREE(input->data); - input->data = NULL; - } - - input->istream->free(input->istream); - - // Finally, free the space for the structure itself - // - ANTLR3_FREE(input); - - // Done - // -} - -static void -antlr38BitSetUcaseLA (pANTLR3_INPUT_STREAM input, ANTLR3_BOOLEAN flag) -{ - if (flag) - { - // Return the upper case version of the characters - // - input->istream->_LA = antlr38BitLA_ucase; - } - else - { - // Return the raw characters as they are in the buffer - // - input->istream->_LA = antlr38BitLA; - } -} - - -/** \brief Reset a re-startable input stream to the start - * - * \param input Input stream context pointer - */ -static void -antlr3InputReset(pANTLR3_INPUT_STREAM input) -{ - - input->nextChar = input->data; /* Input at first character */ - input->line = 1; /* starts at line 1 */ - input->charPositionInLine = -1; - input->currentLine = input->data; - input->markDepth = 0; /* Reset markers */ - - /* Clear out up the markers table if it is there - */ - if (input->markers != NULL) - { - input->markers->clear(input->markers); - } - else - { - /* Install a new markers table - */ - input->markers = antlr3VectorNew(0); - } -} - -/** Install a new source code in to a working input stream so that the - * input stream can be reused. - */ -static void -antlr38BitReuse(pANTLR3_INPUT_STREAM input, pANTLR3_UINT8 inString, ANTLR3_UINT32 size, pANTLR3_UINT8 name) -{ - input->isAllocated = ANTLR3_FALSE; - input->data = inString; - input->sizeBuf = size; - - // Now we can set up the file name. As we are reusing the stream, there may already - // be a string that we can reuse for holding the filename. - // - if (input->istream->streamName == NULL) - { - input->istream->streamName = input->strFactory->newStr(input->strFactory, name == NULL ? (pANTLR3_UINT8)"-memory-" : name); - input->fileName = input->istream->streamName; - } - else - { - input->istream->streamName->set(input->istream->streamName, (name == NULL ? (const char *)"-memory-" : (const char *)name)); - } - - input->reset(input); -} - -/** \brief Consume the next character in an 8 bit input stream - * - * \param input Input stream context pointer - */ -static void -antlr38BitConsume(pANTLR3_INT_STREAM is) -{ - pANTLR3_INPUT_STREAM input; - - input = ((pANTLR3_INPUT_STREAM) (is->super)); - - if ((pANTLR3_UINT8)(input->nextChar) < (((pANTLR3_UINT8)input->data) + input->sizeBuf)) - { - /* Indicate one more character in this line - */ - input->charPositionInLine++; - - if ((ANTLR3_UCHAR)(*((pANTLR3_UINT8)input->nextChar)) == input->newlineChar) - { - /* Reset for start of a new line of input - */ - input->line++; - input->charPositionInLine = 0; - input->currentLine = (void *)(((pANTLR3_UINT8)input->nextChar) + 1); - } - - /* Increment to next character position - */ - input->nextChar = (void *)(((pANTLR3_UINT8)input->nextChar) + 1); - } -} - -/** \brief Return the input element assuming an 8 bit ascii 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) - */ -static ANTLR3_UCHAR -antlr38BitLA(pANTLR3_INT_STREAM is, ANTLR3_INT32 la) -{ - pANTLR3_INPUT_STREAM input; - - input = ((pANTLR3_INPUT_STREAM) (is->super)); - - if (( ((pANTLR3_UINT8)input->nextChar) + la - 1) >= (((pANTLR3_UINT8)input->data) + input->sizeBuf)) - { - return ANTLR3_CHARSTREAM_EOF; - } - else - { - return (ANTLR3_UCHAR)(*((pANTLR3_UINT8)input->nextChar + la - 1)); - } -} - -/** \brief Return the input element assuming an 8 bit input and - * always return the UPPER CASE character. - * Note that this is 8 bit and so we assume that the toupper - * function will use the correct locale for 8 bits. - * - * \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) - */ -static ANTLR3_UCHAR -antlr38BitLA_ucase (pANTLR3_INT_STREAM is, ANTLR3_INT32 la) -{ - pANTLR3_INPUT_STREAM input; - - input = ((pANTLR3_INPUT_STREAM) (is->super)); - - if (( ((pANTLR3_UINT8)input->nextChar) + la - 1) >= (((pANTLR3_UINT8)input->data) + input->sizeBuf)) - { - return ANTLR3_CHARSTREAM_EOF; - } - else - { - return (ANTLR3_UCHAR)toupper((*((pANTLR3_UINT8)input->nextChar + la - 1))); - } -} - - -/** \brief Return the input element assuming an 8 bit ascii input - * - * \param[in] input Input stream context pointer - * \param[in] lt 1 based offset of next input stream element - * - * \return Next input character in internal ANTLR3 encoding (UTF32) - */ -static void * -antlr38BitLT(pANTLR3_INPUT_STREAM input, ANTLR3_INT32 lt) -{ - /* Casting is horrible but it means no warnings and LT should never be called - * on a character stream anyway I think. If it is then, the void * will need to be - * cast back in a similar manner. Yuck! But this means that LT for Token streams and - * tree streams is correct. - */ - return (ANTLR3_FUNC_PTR(input->istream->_LA(input->istream, lt))); -} - -/** \brief Calculate the current index in the output stream. - * \param[in] input Input stream context pointer - */ -static ANTLR3_MARKER -antlr38BitIndex(pANTLR3_INT_STREAM is) -{ - pANTLR3_INPUT_STREAM input; - - input = ((pANTLR3_INPUT_STREAM) (is->super)); - - return (ANTLR3_MARKER)(((pANTLR3_UINT8)input->nextChar)); -} - -/** \brief Return the size of the current input stream, as an 8Bit file - * which in this case is the total input. Other implementations may provide - * more sophisticated implementations to deal with non-recoverable streams - * and so on. - * - * \param[in] input Input stream context pointer - */ -static ANTLR3_UINT32 -antlr38BitSize(pANTLR3_INPUT_STREAM input) -{ - return input->sizeBuf; -} - -/** \brief Mark the current input point in an 8Bit 8 bit stream - * such as a file stream, where all the input is available in the - * buffer. - * - * \param[in] is Input stream context pointer - */ -static ANTLR3_MARKER -antlr38BitMark (pANTLR3_INT_STREAM is) -{ - pANTLR3_LEX_STATE state; - pANTLR3_INPUT_STREAM input; - - input = ((pANTLR3_INPUT_STREAM) (is->super)); - - /* New mark point - */ - input->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->markDepth > input->markers->count) - { - state = ANTLR3_MALLOC(sizeof(ANTLR3_LEX_STATE)); - - /* Add it to the table - */ - input->markers->add(input->markers, state, ANTLR3_FREE_FUNC); /* No special structure, just free() on delete */ - } - else - { - state = (pANTLR3_LEX_STATE)input->markers->get(input->markers, input->markDepth - 1); - - /* 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->charPositionInLine = input->charPositionInLine; - state->currentLine = input->currentLine; - state->line = input->line; - state->nextChar = input->nextChar; - - is->lastMarker = input->markDepth; - - /* And that's it - */ - return input->markDepth; -} -/** \brief Rewind the lexer input to the state specified by the last produced mark. - * - * \param[in] input Input stream context pointer - * - * \remark - * Assumes 8 Bit input stream. - */ -static void -antlr38BitRewindLast (pANTLR3_INT_STREAM is) -{ - is->rewind(is, is->lastMarker); -} - -/** \brief Rewind the lexer input to the state specified by the supplied mark. - * - * \param[in] input Input stream context pointer - * - * \remark - * Assumes 8 Bit input stream. - */ -static void -antlr38BitRewind (pANTLR3_INT_STREAM is, ANTLR3_MARKER mark) -{ - pANTLR3_LEX_STATE state; - pANTLR3_INPUT_STREAM input; - - input = ((pANTLR3_INPUT_STREAM) is->super); - - /* Perform any clean up of the marks - */ - input->istream->release(input->istream, mark); - - /* Find the supplied mark state - */ - state = (pANTLR3_LEX_STATE)input->markers->get(input->markers, (ANTLR3_UINT32)(mark - 1)); - - /* Seek input pointer to the requested point (note we supply the void *pointer - * to whatever is implementing the int stream to seek). - */ - antlr38BitSeek(is, (ANTLR3_MARKER)(state->nextChar)); - - /* Reset to the reset of the information in the mark - */ - input->charPositionInLine = state->charPositionInLine; - input->currentLine = state->currentLine; - input->line = state->line; - input->nextChar = state->nextChar; - - /* And we are done - */ -} - -/** \brief Rewind the lexer input to the state specified by the supplied mark. - * - * \param[in] input Input stream context pointer - * - * \remark - * Assumes 8 Bit input stream. - */ -static void -antlr38BitRelease (pANTLR3_INT_STREAM is, ANTLR3_MARKER mark) -{ - pANTLR3_INPUT_STREAM input; - - input = ((pANTLR3_INPUT_STREAM) (is->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->markDepth = (ANTLR3_UINT32)(mark - 1); -} - -/** \brief Rewind the lexer input to the state specified by the supplied mark. - * - * \param[in] input Input stream context pointer - * - * \remark - * Assumes 8 Bit input stream. - */ -static void -antlr38BitSeek (pANTLR3_INT_STREAM is, ANTLR3_MARKER seekPoint) -{ - ANTLR3_INT32 count; - pANTLR3_INPUT_STREAM input; - - input = ANTLR3_FUNC_PTR(((pANTLR3_INPUT_STREAM) is->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. - */ - if (seekPoint <= (ANTLR3_MARKER)(input->nextChar)) - { - input->nextChar = ((pANTLR3_UINT8) seekPoint); - } - else - { - count = (ANTLR3_UINT32)(seekPoint - (ANTLR3_MARKER)(input->nextChar)); - - while (count--) - { - is->consume(is); - } - } -} -/** Return a substring of the 8 bit input stream in - * newly allocated memory. - * - * \param input Input stream context pointer - * \param start Offset in input stream where the string starts - * \param stop Offset in the input stream where the string ends. - */ -static pANTLR3_STRING -antlr38BitSubstr (pANTLR3_INPUT_STREAM input, ANTLR3_MARKER start, ANTLR3_MARKER stop) -{ - return input->strFactory->newPtr(input->strFactory, (pANTLR3_UINT8)start, (ANTLR3_UINT32)(stop - start + 1)); -} - -/** \brief Return the line number as understood by the 8 bit input stream. - * - * \param input Input stream context pointer - * \return Line number in input stream that we believe we are working on. - */ -static ANTLR3_UINT32 -antlr38BitGetLine (pANTLR3_INPUT_STREAM input) -{ - return input->line; -} - -/** Return a pointer into the input stream that points at the start - * of the current input line as triggered by the end of line character installed - * for the stream ('\n' unless told differently). - * - * \param[in] input - */ -static void * -antlr38BitGetLineBuf (pANTLR3_INPUT_STREAM input) -{ - return input->currentLine; -} - -/** Return the current offset in to the current line in the input stream. - * - * \param input Input stream context pointer - * \return Current line offset - */ -static ANTLR3_UINT32 -antlr38BitGetCharPosition (pANTLR3_INPUT_STREAM input) -{ - return input->charPositionInLine; -} - -/** Set the current line number as understood by the input stream. - * - * \param input Input stream context pointer - * \param line Line number to tell the input stream we are on - * - * \remark - * This function does not change any pointers, it just allows the programmer to set the - * line number according to some external criterion, such as finding a lexed directive - * like: #nnn "file.c" for instance, such that error reporting and so on in is in sync - * with some original source format. - */ -static void -antlr38BitSetLine (pANTLR3_INPUT_STREAM input, ANTLR3_UINT32 line) -{ - input->line = line; -} - -/** Set the current offset in the current line to be a particular setting. - * - * \param[in] input Input stream context pointer - * \param[in] position New setting for current offset. - * - * \remark - * This does not set the actual pointers in the input stream, it is purely for reporting - * purposes and so on as per antlr38BitSetLine(); - */ -static void -antlr38BitSetCharPosition (pANTLR3_INPUT_STREAM input, ANTLR3_UINT32 position) -{ - input->charPositionInLine = position; -} - -/** Set the newline trigger character in the input stream to the supplied parameter. - * - * \param[in] input Input stream context pointer - * \param[in] newlineChar Character to set to be the newline trigger. - * - * \remark - * - The supplied newLineChar is in UTF32 encoding (which means ASCII and latin1 etc - * are the same encodings), but the input stream catered to by this function is 8 bit - * only, so it is up to the programmer to ensure that the character supplied is valid. - */ -static void -antlr38BitSetNewLineChar (pANTLR3_INPUT_STREAM input, ANTLR3_UINT32 newlineChar) -{ - input->newlineChar = newlineChar; -} - - -/// \brief Common function to setup function interface for a UTF16 or UCS2 input stream. -/// -/// \param input Input stream context pointer -/// -/// \remark -/// - Strictly speaking, there is no such thing as a UCS2 input stream as the term -/// tends to confuse the notions of character encoding, unicode and so on. UCS2 is -/// essentially UTF16 without any surrogates and so the standard UTF16 -/// input stream is able to handle it without any special code. -/// -void -antlr3UTF16SetupStream (pANTLR3_INPUT_STREAM input, ANTLR3_BOOLEAN machineBigEndian, ANTLR3_BOOLEAN inputBigEndian) -{ - // Build a string factory for this stream. This is a UTF16 string factory which is a standard - // part of the ANTLR3 string. The string factory is then passed through the whole chain - // of lexer->parser->tree->treeparser and so on. - // - input->strFactory = antlr3StringFactoryNew(input->encoding); - - // Generic API that does not care about endianess. - // - input->istream->index = antlr3UTF16Index; // Calculate current index in input stream, UTF16 based - input->substr = antlr3UTF16Substr; // Return a string from the input stream - input->istream->seek = antlr3UTF16Seek; // How to seek to a specific point in the stream - - // 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 - // - - switch (machineBigEndian) - { - case ANTLR3_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 == ANTLR3_TRUE) - { - // Input is machine compatible - // - input->istream->consume = antlr3UTF16Consume; // Consume the next UTF16 character in the buffer - input->istream->_LA = antlr3UTF16LA; // Return the UTF32 character at offset n (1 based) - } - else - { - // Need to use methods that know that the input is little endian - // - input->istream->consume = antlr3UTF16ConsumeLE; // Consume the next UTF16 character in the buffer - input->istream->_LA = antlr3UTF16LALE; // Return the UTF32 character at offset n (1 based) - } - break; - - case ANTLR3_FALSE: - - // 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 == ANTLR3_FALSE) - { - // Input is machine compatible - // - input->istream->consume = antlr3UTF16Consume; // Consume the next UTF16 character in the buffer - input->istream->_LA = antlr3UTF16LA; // Return the UTF32 character at offset n (1 based) - } - else - { - // Need to use methods that know that the input is Big Endian - // - input->istream->consume = antlr3UTF16ConsumeBE; // Consume the next UTF16 character in the buffer - input->istream->_LA = antlr3UTF16LABE; // Return the UTF32 character at offset n (1 based) - } - break; - } - - - input->charByteSize = 2; // Size in bytes of characters in this stream. - -} - -/// \brief Consume the next character in a UTF16 input stream -/// -/// \param input Input stream context pointer -/// -static void -antlr3UTF16Consume(pANTLR3_INT_STREAM is) -{ - pANTLR3_INPUT_STREAM input; - UTF32 ch; - UTF32 ch2; - - input = ((pANTLR3_INPUT_STREAM) (is->super)); - - // Buffer size is always in bytes - // - if ((pANTLR3_UINT8)(input->nextChar) < (((pANTLR3_UINT8)input->data) + input->sizeBuf)) - { - // Indicate one more character in this line - // - input->charPositionInLine++; - - if ((ANTLR3_UCHAR)(*((pANTLR3_UINT16)input->nextChar)) == input->newlineChar) - { - // Reset for start of a new line of input - // - input->line++; - input->charPositionInLine = 0; - input->currentLine = (void *)(((pANTLR3_UINT16)input->nextChar) + 1); - } - - // Increment to next character position, accounting for any surrogates - // - // Next char in natural machine byte order - // - ch = *((UTF16*)input->nextChar); - - // We consumed one 16 bit character - // - input->nextChar = (void *)(((pANTLR3_UINT16)input->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 ((pANTLR3_UINT8)(input->nextChar) < (((pANTLR3_UINT8)input->data) + input->sizeBuf)) - { - // Next character is in natural machine byte order - // - ch2 = *((UTF16*)input->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->nextChar = (void *)(((pANTLR3_UINT16)input->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. - // - } -} - -/// \brief Return the input element assuming an 8 bit ascii 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) -/// -static ANTLR3_UCHAR -antlr3UTF16LA(pANTLR3_INT_STREAM is, ANTLR3_INT32 la) -{ - pANTLR3_INPUT_STREAM input; - UTF32 ch; - UTF32 ch2; - UTF16 * nextChar; - - // Find the input interface and where we are currently pointing to - // in the input stream - // - input = ((pANTLR3_INPUT_STREAM) (is->super)); - nextChar = input->nextChar; - - // If a positive offset then advance forward, else retreat - // - if (la >= 0) - { - while (--la > 0 && (pANTLR3_UINT8)nextChar < ((pANTLR3_UINT8)input->data) + input->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 ((pANTLR3_UINT8)(nextChar) < (((pANTLR3_UINT8)input->data) + input->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 && (pANTLR3_UINT8)nextChar > (pANTLR3_UINT8)input->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 ( (pANTLR3_UINT8)nextChar >= (((pANTLR3_UINT8)input->data) + input->sizeBuf)) - { - return ANTLR3_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 ((pANTLR3_UINT8)(nextChar) < (((pANTLR3_UINT8)input->data) + input->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; -} - - -/// \brief Calculate the current index in the output stream. -/// \param[in] input Input stream context pointer -/// -static ANTLR3_MARKER -antlr3UTF16Index(pANTLR3_INT_STREAM is) -{ - pANTLR3_INPUT_STREAM input; - - input = ((pANTLR3_INPUT_STREAM) (is->super)); - - return (ANTLR3_MARKER)(input->nextChar); -} - -/// \brief Rewind the lexer input to the state specified by the supplied mark. -/// -/// \param[in] input Input stream context pointer -/// -/// \remark -/// Assumes UTF16 input stream. -/// -static void -antlr3UTF16Seek (pANTLR3_INT_STREAM is, ANTLR3_MARKER seekPoint) -{ - pANTLR3_INPUT_STREAM input; - - input = ((pANTLR3_INPUT_STREAM) is->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 <= (ANTLR3_MARKER)(input->nextChar)) - { - input->nextChar = (void *)seekPoint; - } - else - { - // Call consume until we reach the asked for seek point or EOF - // - while (is->_LA(is, 1) != ANTLR3_CHARSTREAM_EOF && seekPoint < (ANTLR3_MARKER)input->nextChar) - { - is->consume(is); - } - } -} -/// \brief Return a substring of the UTF16 input stream in -/// newly allocated memory. -/// -/// \param input Input stream context pointer -/// \param start Offset in input stream where the string starts -/// \param stop Offset in the input stream where the string ends. -/// -static pANTLR3_STRING -antlr3UTF16Substr (pANTLR3_INPUT_STREAM input, ANTLR3_MARKER start, ANTLR3_MARKER stop) -{ - return input->strFactory->newPtr(input->strFactory, (pANTLR3_UINT8)start, ((ANTLR3_UINT32_CAST(stop - start))/2) + 1); -} - -/// \brief Consume the next character in a UTF16 input stream when the input is Little Endian and the machine is not -/// Note that the UTF16 routines do not do any substantial verification of the input stream as for performance -/// sake, we assume it is validly encoded. So if a low surrogate is found at the curent input position then we -/// just consume it. Surrogate pairs should be seen as Hi, Lo. So if we have a Lo first, then the input stream -/// is fubar but we just ignore that. -/// -/// \param input Input stream context pointer -/// -static void -antlr3UTF16ConsumeLE(pANTLR3_INT_STREAM is) -{ - pANTLR3_INPUT_STREAM input; - UTF32 ch; - UTF32 ch2; - - input = ((pANTLR3_INPUT_STREAM) (is->super)); - - // Buffer size is always in bytes - // - if ((pANTLR3_UINT8)(input->nextChar) < (((pANTLR3_UINT8)input->data) + input->sizeBuf)) - { - // Indicate one more character in this line - // - input->charPositionInLine++; - - if ((ANTLR3_UCHAR)(*((pANTLR3_UINT16)input->nextChar)) == input->newlineChar) - { - // Reset for start of a new line of input - // - input->line++; - input->charPositionInLine = 0; - input->currentLine = (void *)(((pANTLR3_UINT16)input->nextChar) + 1); - } - - // Increment to next character position, accounting for any surrogates - // - // Next char in litle endian form - // - ch = *((pANTLR3_UINT8)input->nextChar) + (*((pANTLR3_UINT8)input->nextChar + 1) <<8); - - // We consumed one 16 bit character - // - input->nextChar = (void *)(((pANTLR3_UINT16)input->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 ((pANTLR3_UINT8)(input->nextChar) < (((pANTLR3_UINT8)input->data) + input->sizeBuf)) - { - ch2 = *((pANTLR3_UINT8)input->nextChar) + (*((pANTLR3_UINT8)input->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->nextChar = (void *)(((pANTLR3_UINT16)input->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. - // - } -} - -/// \brief Return the input element assuming a UTF16 input when the input is Little Endian and the machine is not -/// -/// \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) -/// -static ANTLR3_UCHAR -antlr3UTF16LALE(pANTLR3_INT_STREAM is, ANTLR3_INT32 la) -{ - pANTLR3_INPUT_STREAM input; - UTF32 ch; - UTF32 ch2; - pANTLR3_UCHAR nextChar; - - // Find the input interface and where we are currently pointing to - // in the input stream - // - input = ((pANTLR3_INPUT_STREAM) (is->super)); - nextChar = input->nextChar; - - // If a positive offset then advance forward, else retreat - // - if (la >= 0) - { - while (--la > 0 && (pANTLR3_UINT8)nextChar < ((pANTLR3_UINT8)input->data) + input->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 ((pANTLR3_UINT8)(nextChar) < (((pANTLR3_UINT8)input->data) + input->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 && (pANTLR3_UINT8)nextChar > (pANTLR3_UINT8)input->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 ( (pANTLR3_UINT8)nextChar >= (((pANTLR3_UINT8)input->data) + input->sizeBuf)) - { - return ANTLR3_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 ((pANTLR3_UINT8)(nextChar) < (((pANTLR3_UINT8)input->data) + input->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; -} - -/// \brief Consume the next character in a UTF16 input stream when the input is Big Endian and the machine is not -/// -/// \param input Input stream context pointer -/// -static void -antlr3UTF16ConsumeBE(pANTLR3_INT_STREAM is) -{ - pANTLR3_INPUT_STREAM input; - UTF32 ch; - UTF32 ch2; - - input = ((pANTLR3_INPUT_STREAM) (is->super)); - - // Buffer size is always in bytes - // - if ((pANTLR3_UINT8)(input->nextChar) < (((pANTLR3_UINT8)input->data) + input->sizeBuf)) - { - // Indicate one more character in this line - // - input->charPositionInLine++; - - if ((ANTLR3_UCHAR)(*((pANTLR3_UINT16)input->nextChar)) == input->newlineChar) - { - // Reset for start of a new line of input - // - input->line++; - input->charPositionInLine = 0; - input->currentLine = (void *)(((pANTLR3_UINT16)input->nextChar) + 1); - } - - // Increment to next character position, accounting for any surrogates - // - // Next char in big endian form - // - ch = *((pANTLR3_UINT8)input->nextChar + 1) + (*((pANTLR3_UINT8)input->nextChar ) <<8); - - // We consumed one 16 bit character - // - input->nextChar = (void *)(((pANTLR3_UINT16)input->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 ((pANTLR3_UINT8)(input->nextChar) < (((pANTLR3_UINT8)input->data) + input->sizeBuf)) - { - // Big endian - // - ch2 = *((pANTLR3_UINT8)input->nextChar + 1) + (*((pANTLR3_UINT8)input->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->nextChar = (void *)(((pANTLR3_UINT16)input->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. - // - } -} - -/// \brief Return the input element assuming a UTF16 input when the input is Little Endian and the machine is not -/// -/// \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) -/// -static ANTLR3_UCHAR -antlr3UTF16LABE(pANTLR3_INT_STREAM is, ANTLR3_INT32 la) -{ - pANTLR3_INPUT_STREAM input; - UTF32 ch; - UTF32 ch2; - pANTLR3_UCHAR nextChar; - - // Find the input interface and where we are currently pointing to - // in the input stream - // - input = ((pANTLR3_INPUT_STREAM) (is->super)); - nextChar = input->nextChar; - - // If a positive offset then advance forward, else retreat - // - if (la >= 0) - { - while (--la > 0 && (pANTLR3_UINT8)nextChar < ((pANTLR3_UINT8)input->data) + input->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 ((pANTLR3_UINT8)(nextChar) < (((pANTLR3_UINT8)input->data) + input->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 && (pANTLR3_UINT8)nextChar > (pANTLR3_UINT8)input->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 ( (pANTLR3_UINT8)nextChar >= (((pANTLR3_UINT8)input->data) + input->sizeBuf)) - { - return ANTLR3_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 ((pANTLR3_UINT8)(nextChar) < (((pANTLR3_UINT8)input->data) + input->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; -} - -/// \brief Common function to setup function interface for a UTF3 input stream. -/// -/// \param input Input stream context pointer -/// -void -antlr3UTF32SetupStream (pANTLR3_INPUT_STREAM input, ANTLR3_BOOLEAN machineBigEndian, ANTLR3_BOOLEAN inputBigEndian) -{ - // Build a string factory for this stream. This is a UTF32 string factory which is a standard - // part of the ANTLR3 string. The string factory is then passed through the whole chain of lexer->parser->tree->treeparser - // and so on. - // - input->strFactory = antlr3StringFactoryNew(input->encoding); - - // Generic API that does not care about endianess. - // - input->istream->index = antlr3UTF32Index; // Calculate current index in input stream, UTF16 based - input->substr = antlr3UTF32Substr; // Return a string from the input stream - input->istream->seek = antlr3UTF32Seek; // How to seek to a specific point in the stream - input->istream->consume = antlr3UTF32Consume; // Consume the next UTF32 character in the buffer - - // We must install different UTF32 LA 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 - // - switch (machineBigEndian) - { - case ANTLR3_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 == ANTLR3_TRUE) - { - // Input is machine compatible - // - input->istream->_LA = antlr3UTF32LA; // Return the UTF32 character at offset n (1 based) - } - else - { - // Need to use methods that know that the input is little endian - // - input->istream->_LA = antlr3UTF32LALE; // Return the UTF32 character at offset n (1 based) - } - break; - - case ANTLR3_FALSE: - - // 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 == ANTLR3_FALSE) - { - // Input is machine compatible - // - input->istream->_LA = antlr3UTF32LA; // Return the UTF32 character at offset n (1 based) - } - else - { - // Need to use methods that know that the input is Big Endian - // - input->istream->_LA = antlr3UTF32LABE; // Return the UTF32 character at offset n (1 based) - } - break; - } - - input->charByteSize = 4; // Size in bytes of characters in this stream. -} - -/** \brief Consume the next character in a UTF32 input stream - * - * \param input Input stream context pointer - */ -static void -antlr3UTF32Consume(pANTLR3_INT_STREAM is) -{ - pANTLR3_INPUT_STREAM input; - - input = ((pANTLR3_INPUT_STREAM) (is->super)); - - // SizeBuf is always in bytes - // - if ((pANTLR3_UINT8)(input->nextChar) < (((pANTLR3_UINT8)input->data) + input->sizeBuf)) - { - /* Indicate one more character in this line - */ - input->charPositionInLine++; - - if ((ANTLR3_UCHAR)(*((pANTLR3_UINT32)input->nextChar)) == input->newlineChar) - { - /* Reset for start of a new line of input - */ - input->line++; - input->charPositionInLine = 0; - input->currentLine = (void *)(((pANTLR3_UINT32)input->nextChar) + 1); - } - - /* Increment to next character position - */ - input->nextChar = (void *)(((pANTLR3_UINT32)input->nextChar) + 1); - } -} - -/// \brief Calculate the current index in the output stream. -/// \param[in] input Input stream context pointer -/// -static ANTLR3_MARKER -antlr3UTF32Index(pANTLR3_INT_STREAM is) -{ - pANTLR3_INPUT_STREAM input; - - input = ((pANTLR3_INPUT_STREAM) (is->super)); - - return (ANTLR3_MARKER)(input->nextChar); -} - -/// \brief Return a substring of the UTF16 input stream in -/// newly allocated memory. -/// -/// \param input Input stream context pointer -/// \param start Offset in input stream where the string starts -/// \param stop Offset in the input stream where the string ends. -/// -static pANTLR3_STRING -antlr3UTF32Substr (pANTLR3_INPUT_STREAM input, ANTLR3_MARKER start, ANTLR3_MARKER stop) -{ - return input->strFactory->newPtr(input->strFactory, (pANTLR3_UINT8)start, ((ANTLR3_UINT32_CAST(stop - start))/4) + 1); -} - -/// \brief Rewind the lexer input to the state specified by the supplied mark. -/// -/// \param[in] input Input stream context pointer -/// -/// \remark -/// Assumes UTF32 input stream. -/// -static void -antlr3UTF32Seek (pANTLR3_INT_STREAM is, ANTLR3_MARKER seekPoint) -{ - pANTLR3_INPUT_STREAM input; - - input = ((pANTLR3_INPUT_STREAM) is->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 <= (ANTLR3_MARKER)(input->nextChar)) - { - input->nextChar = (void *)seekPoint; - } - else - { - // Call consume until we reach the asked for seek point or EOF - // - while (is->_LA(is, 1) != ANTLR3_CHARSTREAM_EOF && seekPoint < (ANTLR3_MARKER)input->nextChar) - { - is->consume(is); - } - } -} - -/** \brief Return the input element assuming a UTF32 input in natural machine byte order - * - * \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) - */ -static ANTLR3_UCHAR -antlr3UTF32LA(pANTLR3_INT_STREAM is, ANTLR3_INT32 la) -{ - pANTLR3_INPUT_STREAM input; - - input = ((pANTLR3_INPUT_STREAM) (is->super)); - - if (( ((pANTLR3_UINT8)input->nextChar) + la - 1) >= (((pANTLR3_UINT8)input->data) + input->sizeBuf)) - { - return ANTLR3_CHARSTREAM_EOF; - } - else - { - return (ANTLR3_UCHAR)(*((pANTLR3_UINT32)input->nextChar + la - 1)); - } -} - -/** \brief Return the input element assuming a UTF32 input in little endian byte order - * - * \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) - */ -static ANTLR3_UCHAR -antlr3UTF32LALE(pANTLR3_INT_STREAM is, ANTLR3_INT32 la) -{ - pANTLR3_INPUT_STREAM input; - - input = ((pANTLR3_INPUT_STREAM) (is->super)); - - if (( ((pANTLR3_UINT8)input->nextChar) + la - 1) >= (((pANTLR3_UINT8)input->data) + input->sizeBuf)) - { - return ANTLR3_CHARSTREAM_EOF; - } - else - { - ANTLR3_UCHAR c; - - c = (ANTLR3_UCHAR)(*((pANTLR3_UINT32)input->nextChar + la - 1)); - - // Swap Endianess to Big Endian - // - return (c>>24) | ((c<<8) & 0x00FF0000) | ((c>>8) & 0x0000FF00) | (c<<24); - } -} - -/** \brief Return the input element assuming a UTF32 input in big endian byte order - * - * \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) - * \remark This is the same code as LE version but seprated in case there are better optimisations fo rendinan swap - */ -static ANTLR3_UCHAR -antlr3UTF32LABE(pANTLR3_INT_STREAM is, ANTLR3_INT32 la) -{ - pANTLR3_INPUT_STREAM input; - - input = ((pANTLR3_INPUT_STREAM) (is->super)); - - if (( ((pANTLR3_UINT8)input->nextChar) + la - 1) >= (((pANTLR3_UINT8)input->data) + input->sizeBuf)) - { - return ANTLR3_CHARSTREAM_EOF; - } - else - { - ANTLR3_UCHAR c; - - c = (ANTLR3_UCHAR)(*((pANTLR3_UINT32)input->nextChar + la - 1)); - - // Swap Endianess to Little Endian - // - return (c>>24) | ((c<<8) & 0x00FF0000) | ((c>>8) & 0x0000FF00) | (c<<24); - } -} - - -/// \brief Common function to setup function interface for a UTF8 input stream. -/// -/// \param input Input stream context pointer -/// -void -antlr3UTF8SetupStream (pANTLR3_INPUT_STREAM input) -{ - // Build a string factory for this stream. This is a UTF16 string factory which is a standard - // part of the ANTLR3 string. The string factory is then passed through the whole chain of lexer->parser->tree->treeparser - // and so on. - // - input->strFactory = antlr3StringFactoryNew(input->encoding); - - // Generic API that does not care about endianess. - // - input->istream->consume = antlr3UTF8Consume; // Consume the next UTF32 character in the buffer - input->istream->_LA = antlr3UTF8LA; // Return the UTF32 character at offset n (1 based) - input->charByteSize = 0; // Size in bytes of characters in this stream. -} - -// ------------------------------------------------------ -// 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. -/// -static const ANTLR3_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 -}; - -/// 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. -/// -static const UTF32 offsetsFromUTF8[6] = - { 0x00000000UL, 0x00003080UL, 0x000E2080UL, - 0x03C82080UL, 0xFA082080UL, 0x82082080UL - }; - -// End of Unicode.org tables -// ------------------------- - - -/** \brief Consume the next character in a UTF8 input stream - * - * \param input Input stream context pointer - */ -static void -antlr3UTF8Consume(pANTLR3_INT_STREAM is) -{ - pANTLR3_INPUT_STREAM input; - ANTLR3_UINT32 extraBytesToRead; - ANTLR3_UCHAR ch; - pANTLR3_UINT8 nextChar; - - input = ((pANTLR3_INPUT_STREAM) (is->super)); - - nextChar = input->nextChar; - - if (nextChar < (((pANTLR3_UINT8)input->data) + input->sizeBuf)) - { - // Indicate one more character in this line - // - input->charPositionInLine++; - - // Are there more bytes needed to make up the whole thing? - // - extraBytesToRead = trailingBytesForUTF8[*nextChar]; - - if (nextChar + extraBytesToRead >= (((pANTLR3_UINT8)input->data) + input->sizeBuf)) - { - input->nextChar = (((pANTLR3_UINT8)input->data) + input->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->newlineChar) - { - /* Reset for start of a new line of input - */ - input->line++; - input->charPositionInLine = 0; - input->currentLine = (void *)nextChar; - } - - // Update input pointer - // - input->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) - */ -static ANTLR3_UCHAR -antlr3UTF8LA(pANTLR3_INT_STREAM is, ANTLR3_INT32 la) -{ - pANTLR3_INPUT_STREAM input; - ANTLR3_UINT32 extraBytesToRead; - ANTLR3_UCHAR ch; - pANTLR3_UINT8 nextChar; - - input = ((pANTLR3_INPUT_STREAM) (is->super)); - - nextChar = input->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 < (((pANTLR3_UINT8)input->data) + input->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 >= (((pANTLR3_UINT8)input->data) + input->sizeBuf)) - { - return ANTLR3_CHARSTREAM_EOF; - } - } - } - else - { - return ANTLR3_CHARSTREAM_EOF; - } - } - else - { - // LA is negative so we decrease the pointer by n character positions - // - while (nextChar > (pANTLR3_UINT8)input->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 >= (((pANTLR3_UINT8)input->data) + input->sizeBuf)) - { - return ANTLR3_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; -} - -// 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 ANTLR3_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 -}; - -/// \brief Common function to setup function interface for a EBCDIC input stream. -/// -/// \param input Input stream context pointer -/// -void -antlr3EBCDICSetupStream (pANTLR3_INPUT_STREAM input) -{ - // EBCDIC streams can use the standard 8 bit string factory - // - input->strFactory = antlr3StringFactoryNew(input->encoding); - - // Generic API that does not care about endianess. - // - input->istream->_LA = antlr3EBCDICLA; // Return the UTF32 character at offset n (1 based) - input->charByteSize = 1; // Size in bytes of characters in this stream. -} - -/// \brief Return the input element assuming an 8 bit EBCDIC 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) after translation -/// from EBCDIC to ASCII -/// -static ANTLR3_UCHAR -antlr3EBCDICLA(pANTLR3_INT_STREAM is, ANTLR3_INT32 la) -{ - pANTLR3_INPUT_STREAM input; - - input = ((pANTLR3_INPUT_STREAM) (is->super)); - - if (( ((pANTLR3_UINT8)input->nextChar) + la - 1) >= (((pANTLR3_UINT8)input->data) + input->sizeBuf)) - { - return ANTLR3_CHARSTREAM_EOF; - } - else - { - // Translate the required character via the constant conversion table - // - return e2a[(*((pANTLR3_UINT8)input->nextChar + la - 1))]; - } -}
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