X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=bundles%2Forg.simantics.databoard%2Fcpp%2FDataBoardTest%2Flibantlr3c-3.2%2Fsrc%2Fantlr3inputstream.c;fp=bundles%2Forg.simantics.databoard%2Fcpp%2FDataBoardTest%2Flibantlr3c-3.2%2Fsrc%2Fantlr3inputstream.c;h=a4307ac42c23ff49e4bd54a65c528760e72c515f;hb=969bd23cab98a79ca9101af33334000879fb60c5;hp=0000000000000000000000000000000000000000;hpb=866dba5cd5a3929bbeae85991796acb212338a08;p=simantics%2Fplatform.git diff --git a/bundles/org.simantics.databoard/cpp/DataBoardTest/libantlr3c-3.2/src/antlr3inputstream.c b/bundles/org.simantics.databoard/cpp/DataBoardTest/libantlr3c-3.2/src/antlr3inputstream.c new file mode 100644 index 000000000..a4307ac42 --- /dev/null +++ b/bundles/org.simantics.databoard/cpp/DataBoardTest/libantlr3c-3.2/src/antlr3inputstream.c @@ -0,0 +1,619 @@ +/// \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 + + +// INT Stream API +// +static void antlr3AsciiConsume (pANTLR3_INT_STREAM is); +static ANTLR3_UCHAR antlr3AsciiLA (pANTLR3_INT_STREAM is, ANTLR3_INT32 la); +static ANTLR3_UCHAR antlr3AsciiLA_ucase (pANTLR3_INT_STREAM is, ANTLR3_INT32 la); +static ANTLR3_MARKER antlr3AsciiIndex (pANTLR3_INT_STREAM is); +static ANTLR3_MARKER antlr3AsciiMark (pANTLR3_INT_STREAM is); +static void antlr3AsciiRewind (pANTLR3_INT_STREAM is, ANTLR3_MARKER mark); +static void antlr3AsciiRewindLast (pANTLR3_INT_STREAM is); +static void antlr3AsciiRelease (pANTLR3_INT_STREAM is, ANTLR3_MARKER mark); +static void antlr3AsciiSeek (pANTLR3_INT_STREAM is, ANTLR3_MARKER seekPoint); +static pANTLR3_STRING antlr3AsciiGetSourceName (pANTLR3_INT_STREAM is); + +// ASCII Charstream API functions +// +static void antlr3InputClose (pANTLR3_INPUT_STREAM input); +static void antlr3InputReset (pANTLR3_INPUT_STREAM input); +static void * antlr3AsciiLT (pANTLR3_INPUT_STREAM input, ANTLR3_INT32 lt); +static ANTLR3_UINT32 antlr3AsciiSize (pANTLR3_INPUT_STREAM input); +static pANTLR3_STRING antlr3AsciiSubstr (pANTLR3_INPUT_STREAM input, ANTLR3_MARKER start, ANTLR3_MARKER stop); +static ANTLR3_UINT32 antlr3AsciiGetLine (pANTLR3_INPUT_STREAM input); +static void * antlr3AsciiGetLineBuf (pANTLR3_INPUT_STREAM input); +static ANTLR3_UINT32 antlr3AsciiGetCharPosition (pANTLR3_INPUT_STREAM input); +static void antlr3AsciiSetLine (pANTLR3_INPUT_STREAM input, ANTLR3_UINT32 line); +static void antlr3AsciiSetCharPosition (pANTLR3_INPUT_STREAM input, ANTLR3_UINT32 position); +static void antlr3AsciiSetNewLineChar (pANTLR3_INPUT_STREAM input, ANTLR3_UINT32 newlineChar); +static void antlr3AsciiSetUcaseLA (pANTLR3_INPUT_STREAM input, ANTLR3_BOOLEAN flag); + +/// \brief Common function to setup function interface for an 8 bit ASCII input stream. +/// +/// \param input Input stream context pointer +/// +/// \remark +/// - Many of the 8 bit ASCII 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 ASCII handler then override just those functions +/// that would not work for the particular input encoding, such as consume for instance. +/// +void +antlr3AsciiSetupStream (pANTLR3_INPUT_STREAM input, ANTLR3_UINT32 type) +{ + // Build a string factory for this stream + // + input->strFactory = antlr3StringFactoryNew(); + + // Default stream set up is for ASCII, therefore there is nothing else + // to do but set it up as such + // + antlr3GenericSetupStream(input, type); +} + + +void +antlr3GenericSetupStream (pANTLR3_INPUT_STREAM input, ANTLR3_UINT32 type) +{ + + /* Install function pointers for an 8 bit ASCII input + */ + + /* Allocate stream interface + */ + input->istream = antlr3IntStreamNew(); + input->istream->type = ANTLR3_CHARSTREAM; + input->istream->super = input; + + input->istream->type = type; + + /* Intstream API + */ + input->istream->consume = antlr3AsciiConsume; /* Consume the next 8 bit character in the buffer */ + input->istream->_LA = antlr3AsciiLA; /* Return the UTF32 character at offset n (1 based) */ + input->istream->index = antlr3AsciiIndex; /* Current index (offset from first character */ + input->istream->mark = antlr3AsciiMark; /* Record the current lex state for later restore */ + input->istream->rewind = antlr3AsciiRewind; /* How to rewind the input */ + input->istream->rewindLast = antlr3AsciiRewindLast; /* How to rewind the input */ + input->istream->seek = antlr3AsciiSeek; /* How to seek to a specific point in the stream */ + input->istream->release = antlr3AsciiRelease; /* Reset marks after mark n */ + input->istream->getSourceName = antlr3AsciiGetSourceName; // 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->_LT = antlr3AsciiLT; /* Same as _LA for 8 bit Ascii file */ + input->size = antlr3AsciiSize; /* Return the size of the input buffer */ + input->substr = antlr3AsciiSubstr; /* Return a string from the input stream */ + input->getLine = antlr3AsciiGetLine; /* Return the current line number in the input stream */ + input->getLineBuf = antlr3AsciiGetLineBuf; /* Return a pointer to the start of the current line being consumed */ + input->getCharPositionInLine = antlr3AsciiGetCharPosition; /* Return the offset into the current line of input */ + input->setLine = antlr3AsciiSetLine; /* Set the input stream line number (does not set buffer pointers) */ + input->setCharPositionInLine = antlr3AsciiSetCharPosition; /* Set the offset in to the current line (does not set any pointers ) */ + input->SetNewLineChar = antlr3AsciiSetNewLineChar; /* Set the value of the newline trigger character */ + input->setUcaseLA = antlr3AsciiSetUcaseLA; + + 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 +antlr3AsciiGetSourceName(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 +antlr3AsciiSetUcaseLA (pANTLR3_INPUT_STREAM input, ANTLR3_BOOLEAN flag) +{ + if (flag) + { + // Return the upper case version of the characters + // + input->istream->_LA = antlr3AsciiLA_ucase; + } + else + { + // Return the raw characters as they are in the buffer + // + input->istream->_LA = antlr3AsciiLA; + } +} + + +/** \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 */ + + /* Free up the markers table if it is there + */ + if (input->markers != NULL) + { + input->markers->free(input->markers); + } + + /* Install a new markers table + */ + input->markers = antlr3VectorNew(0); +} + +/** \brief Consume the next character in an 8 bit ASCII input stream + * + * \param input Input stream context pointer + */ +static void +antlr3AsciiConsume(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 +antlr3AsciiLA(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 ASCII 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 +antlr3AsciiLA_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 * +antlr3AsciiLT(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 +antlr3AsciiIndex(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 Ascii 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 +antlr3AsciiSize(pANTLR3_INPUT_STREAM input) +{ + return input->sizeBuf; +} + +/** \brief Mark the current input point in an Ascii 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 +antlr3AsciiMark (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 ASCII (or at least, 8 Bit) input stream. + */ +static void +antlr3AsciiRewindLast (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 ASCII (or at least, 8 Bit) input stream. + */ +static void +antlr3AsciiRewind (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). + */ + antlr3AsciiSeek(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 ASCII (or at least, 8 Bit) input stream. + */ +static void +antlr3AsciiRelease (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 ASCII (or at least, 8 Bit) input stream. + */ +static void +antlr3AsciiSeek (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 ASCII (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 +antlr3AsciiSubstr (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/ASCII input stream. + * + * \param input Input stream context pointer + * \return Line number in input stream that we believe we are working on. + */ +static ANTLR3_UINT32 +antlr3AsciiGetLine (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 * +antlr3AsciiGetLineBuf (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 +antlr3AsciiGetCharPosition (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 +antlr3AsciiSetLine (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 antlr3AsciiSetLine(); + */ +static void +antlr3AsciiSetCharPosition (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 +antlr3AsciiSetNewLineChar (pANTLR3_INPUT_STREAM input, ANTLR3_UINT32 newlineChar) +{ + input->newlineChar = newlineChar; +} + + +