/// \file
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/// Base functions to initialize and manipulate any input stream
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///
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// [The "BSD licence"]
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// Copyright (c) 2005-2009 Jim Idle, Temporal Wave LLC
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// http://www.temporal-wave.com
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// http://www.linkedin.com/in/jimidle
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//
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions
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// are met:
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// 1. Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// 2. Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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// 3. The name of the author may not be used to endorse or promote products
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// derived from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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// OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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// IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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// NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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// THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include <antlr3input.h>
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// -----------------------------------
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// Generic 8 bit input such as latin-1
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//
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// 8Bit INT Stream API
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//
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static void antlr38BitConsume (pANTLR3_INT_STREAM is);
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static ANTLR3_UCHAR antlr38BitLA (pANTLR3_INT_STREAM is, ANTLR3_INT32 la);
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static ANTLR3_UCHAR antlr38BitLA_ucase (pANTLR3_INT_STREAM is, ANTLR3_INT32 la);
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static ANTLR3_MARKER antlr38BitIndex (pANTLR3_INT_STREAM is);
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static ANTLR3_MARKER antlr38BitMark (pANTLR3_INT_STREAM is);
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static void antlr38BitRewind (pANTLR3_INT_STREAM is, ANTLR3_MARKER mark);
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static void antlr38BitRewindLast (pANTLR3_INT_STREAM is);
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static void antlr38BitRelease (pANTLR3_INT_STREAM is, ANTLR3_MARKER mark);
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static void antlr38BitSeek (pANTLR3_INT_STREAM is, ANTLR3_MARKER seekPoint);
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static pANTLR3_STRING antlr38BitGetSourceName (pANTLR3_INT_STREAM is);
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// 8Bit Charstream API functions
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//
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static void antlr3InputClose (pANTLR3_INPUT_STREAM input);
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static void antlr3InputReset (pANTLR3_INPUT_STREAM input);
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static void antlr38BitReuse (pANTLR3_INPUT_STREAM input, pANTLR3_UINT8 inString, ANTLR3_UINT32 size, pANTLR3_UINT8 name);
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static void * antlr38BitLT (pANTLR3_INPUT_STREAM input, ANTLR3_INT32 lt);
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static ANTLR3_UINT32 antlr38BitSize (pANTLR3_INPUT_STREAM input);
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static pANTLR3_STRING antlr38BitSubstr (pANTLR3_INPUT_STREAM input, ANTLR3_MARKER start, ANTLR3_MARKER stop);
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static ANTLR3_UINT32 antlr38BitGetLine (pANTLR3_INPUT_STREAM input);
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static void * antlr38BitGetLineBuf (pANTLR3_INPUT_STREAM input);
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static ANTLR3_UINT32 antlr38BitGetCharPosition (pANTLR3_INPUT_STREAM input);
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static void antlr38BitSetLine (pANTLR3_INPUT_STREAM input, ANTLR3_UINT32 line);
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static void antlr38BitSetCharPosition (pANTLR3_INPUT_STREAM input, ANTLR3_UINT32 position);
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static void antlr38BitSetNewLineChar (pANTLR3_INPUT_STREAM input, ANTLR3_UINT32 newlineChar);
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static void antlr38BitSetUcaseLA (pANTLR3_INPUT_STREAM input, ANTLR3_BOOLEAN flag);
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// -----------------------------------
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// UTF16 (also covers UCS2)
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//
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// INT Stream API
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//
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static void antlr3UTF16Consume (pANTLR3_INT_STREAM is);
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static ANTLR3_UCHAR antlr3UTF16LA (pANTLR3_INT_STREAM is, ANTLR3_INT32 la);
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static void antlr3UTF16ConsumeLE (pANTLR3_INT_STREAM is);
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static ANTLR3_UCHAR antlr3UTF16LALE (pANTLR3_INT_STREAM is, ANTLR3_INT32 la);
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static void antlr3UTF16ConsumeBE (pANTLR3_INT_STREAM is);
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static ANTLR3_UCHAR antlr3UTF16LABE (pANTLR3_INT_STREAM is, ANTLR3_INT32 la);
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static ANTLR3_MARKER antlr3UTF16Index (pANTLR3_INT_STREAM is);
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static void antlr3UTF16Seek (pANTLR3_INT_STREAM is, ANTLR3_MARKER seekPoint);
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// UTF16 Charstream API functions
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//
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static pANTLR3_STRING antlr3UTF16Substr (pANTLR3_INPUT_STREAM input, ANTLR3_MARKER start, ANTLR3_MARKER stop);
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// -----------------------------------
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// UTF32 (also covers UCS2)
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//
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// INT Stream API
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//
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static void antlr3UTF32Consume (pANTLR3_INT_STREAM is);
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static ANTLR3_UCHAR antlr3UTF32LA (pANTLR3_INT_STREAM is, ANTLR3_INT32 la);
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static ANTLR3_UCHAR antlr3UTF32LALE (pANTLR3_INT_STREAM is, ANTLR3_INT32 la);
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static ANTLR3_UCHAR antlr3UTF32LABE (pANTLR3_INT_STREAM is, ANTLR3_INT32 la);
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static ANTLR3_MARKER antlr3UTF32Index (pANTLR3_INT_STREAM is);
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static void antlr3UTF32Seek (pANTLR3_INT_STREAM is, ANTLR3_MARKER seekPoint);
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// UTF16 Charstream API functions
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//
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static pANTLR3_STRING antlr3UTF32Substr (pANTLR3_INPUT_STREAM input, ANTLR3_MARKER start, ANTLR3_MARKER stop);
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// ------------------------------------
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// UTF-8
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//
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static void antlr3UTF8Consume (pANTLR3_INT_STREAM is);
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static ANTLR3_UCHAR antlr3UTF8LA (pANTLR3_INT_STREAM is, ANTLR3_INT32 la);
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// ------------------------------------
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// EBCDIC
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//
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static ANTLR3_UCHAR antlr3EBCDICLA (pANTLR3_INT_STREAM is, ANTLR3_INT32 la);
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/// \brief Common function to setup function interface for an 8 bit input stream.
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///
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/// \param input Input stream context pointer
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///
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/// \remark
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/// - Many of the 8 bit oriented file stream handling functions will be usable
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/// by any or at least some, other input streams. Therefore it is perfectly acceptable
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/// to call this function to install the 8Bit handler then override just those functions
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/// that would not work for the particular input encoding, such as consume for instance.
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///
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void
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antlr38BitSetupStream (pANTLR3_INPUT_STREAM input)
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{
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// Build a string factory for this stream
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//
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input->strFactory = antlr3StringFactoryNew(input->encoding);
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// Default stream API set up is for 8Bit, so we are done
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//
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}
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void
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antlr3GenericSetupStream (pANTLR3_INPUT_STREAM input)
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{
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/* Install function pointers for an 8 bit input
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*/
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/* Allocate stream interface
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*/
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input->istream = antlr3IntStreamNew();
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input->istream->type = ANTLR3_CHARSTREAM;
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input->istream->super = input;
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/* Intstream API
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*/
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input->istream->consume = antlr38BitConsume; // Consume the next 8 bit character in the buffer
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input->istream->_LA = antlr38BitLA; // Return the UTF32 character at offset n (1 based)
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input->istream->index = antlr38BitIndex; // Current index (offset from first character
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input->istream->mark = antlr38BitMark; // Record the current lex state for later restore
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input->istream->rewind = antlr38BitRewind; // How to rewind the input
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input->istream->rewindLast = antlr38BitRewindLast; // How to rewind the input
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input->istream->seek = antlr38BitSeek; // How to seek to a specific point in the stream
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input->istream->release = antlr38BitRelease; // Reset marks after mark n
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input->istream->getSourceName = antlr38BitGetSourceName; // Return a string that names the input source
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/* Charstream API
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*/
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input->close = antlr3InputClose; // Close down the stream completely
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input->free = antlr3InputClose; // Synonym for free
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input->reset = antlr3InputReset; // Reset input to start
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input->reuse = antlr38BitReuse; // Install a new input string and reset
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input->_LT = antlr38BitLT; // Same as _LA for 8 bit file
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input->size = antlr38BitSize; // Return the size of the input buffer
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input->substr = antlr38BitSubstr; // Return a string from the input stream
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input->getLine = antlr38BitGetLine; // Return the current line number in the input stream
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input->getLineBuf = antlr38BitGetLineBuf; // Return a pointer to the start of the current line being consumed
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input->getCharPositionInLine = antlr38BitGetCharPosition; // Return the offset into the current line of input
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input->setLine = antlr38BitSetLine; // Set the input stream line number (does not set buffer pointers)
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input->setCharPositionInLine = antlr38BitSetCharPosition; // Set the offset in to the current line (does not set any pointers)
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input->SetNewLineChar = antlr38BitSetNewLineChar; // Set the value of the newline trigger character
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input->setUcaseLA = antlr38BitSetUcaseLA; // Changes the LA function to return upper case always
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input->charByteSize = 1; // Size in bytes of characters in this stream.
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/* Initialize entries for tables etc
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*/
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input->markers = NULL;
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/* Set up the input stream brand new
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*/
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input->reset(input);
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/* Install default line separator character (it can be replaced
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* by the grammar programmer later)
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*/
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input->SetNewLineChar(input, (ANTLR3_UCHAR)'\n');
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}
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static pANTLR3_STRING
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antlr38BitGetSourceName(pANTLR3_INT_STREAM is)
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{
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return is->streamName;
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}
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/** \brief Close down an input stream and free any memory allocated by it.
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*
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* \param input Input stream context pointer
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*/
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static void
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antlr3InputClose(pANTLR3_INPUT_STREAM input)
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{
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// Close any markers in the input stream
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//
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if (input->markers != NULL)
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{
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input->markers->free(input->markers);
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input->markers = NULL;
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}
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// Close the string factory
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//
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if (input->strFactory != NULL)
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{
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input->strFactory->close(input->strFactory);
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}
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// Free the input stream buffer if we allocated it
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//
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if (input->isAllocated && input->data != NULL)
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{
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ANTLR3_FREE(input->data);
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input->data = NULL;
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}
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input->istream->free(input->istream);
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// Finally, free the space for the structure itself
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//
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ANTLR3_FREE(input);
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// Done
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//
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}
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static void
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antlr38BitSetUcaseLA (pANTLR3_INPUT_STREAM input, ANTLR3_BOOLEAN flag)
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{
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if (flag)
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{
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// Return the upper case version of the characters
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//
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input->istream->_LA = antlr38BitLA_ucase;
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}
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else
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{
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// Return the raw characters as they are in the buffer
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//
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input->istream->_LA = antlr38BitLA;
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}
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}
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/** \brief Reset a re-startable input stream to the start
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*
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* \param input Input stream context pointer
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*/
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static void
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antlr3InputReset(pANTLR3_INPUT_STREAM input)
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{
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input->nextChar = input->data; /* Input at first character */
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input->line = 1; /* starts at line 1 */
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input->charPositionInLine = 0;
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input->currentLine = input->data;
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input->markDepth = 0; /* Reset markers */
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/* Clear out up the markers table if it is there
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*/
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if (input->markers != NULL)
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{
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input->markers->clear(input->markers);
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}
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else
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{
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/* Install a new markers table
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*/
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input->markers = antlr3VectorNew(0);
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}
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}
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/** Install a new source code in to a working input stream so that the
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* input stream can be reused.
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*/
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static void
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antlr38BitReuse(pANTLR3_INPUT_STREAM input, pANTLR3_UINT8 inString, ANTLR3_UINT32 size, pANTLR3_UINT8 name)
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{
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input->isAllocated = ANTLR3_FALSE;
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input->data = inString;
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input->sizeBuf = size;
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// Now we can set up the file name. As we are reusing the stream, there may already
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// be a string that we can reuse for holding the filename.
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//
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if (input->istream->streamName == NULL)
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{
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input->istream->streamName = input->strFactory->newStr(input->strFactory, name == NULL ? (pANTLR3_UINT8)"-memory-" : name);
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input->fileName = input->istream->streamName;
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}
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else
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{
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input->istream->streamName->set(input->istream->streamName, (name == NULL ? (const char *)"-memory-" : (const char *)name));
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}
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input->reset(input);
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}
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/** \brief Consume the next character in an 8 bit input stream
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*
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* \param input Input stream context pointer
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*/
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static void
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antlr38BitConsume(pANTLR3_INT_STREAM is)
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{
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pANTLR3_INPUT_STREAM input;
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input = ((pANTLR3_INPUT_STREAM) (is->super));
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if ((pANTLR3_UINT8)(input->nextChar) < (((pANTLR3_UINT8)input->data) + input->sizeBuf))
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{
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/* Indicate one more character in this line
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*/
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input->charPositionInLine++;
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if ((ANTLR3_UCHAR)(*((pANTLR3_UINT8)input->nextChar)) == input->newlineChar)
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{
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/* Reset for start of a new line of input
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*/
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input->line++;
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input->charPositionInLine = 0;
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input->currentLine = (void *)(((pANTLR3_UINT8)input->nextChar) + 1);
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}
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/* Increment to next character position
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*/
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input->nextChar = (void *)(((pANTLR3_UINT8)input->nextChar) + 1);
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}
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}
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/** \brief Return the input element assuming an 8 bit ascii input
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*
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* \param[in] input Input stream context pointer
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* \param[in] la 1 based offset of next input stream element
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*
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* \return Next input character in internal ANTLR3 encoding (UTF32)
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*/
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static ANTLR3_UCHAR
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antlr38BitLA(pANTLR3_INT_STREAM is, ANTLR3_INT32 la)
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{
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pANTLR3_INPUT_STREAM input;
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input = ((pANTLR3_INPUT_STREAM) (is->super));
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if (( ((pANTLR3_UINT8)input->nextChar) + la - 1) >= (((pANTLR3_UINT8)input->data) + input->sizeBuf))
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{
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return ANTLR3_CHARSTREAM_EOF;
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}
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else
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{
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return (ANTLR3_UCHAR)(*((pANTLR3_UINT8)input->nextChar + la - 1));
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}
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}
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/** \brief Return the input element assuming an 8 bit input and
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* always return the UPPER CASE character.
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* Note that this is 8 bit and so we assume that the toupper
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* function will use the correct locale for 8 bits.
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*
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* \param[in] input Input stream context pointer
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* \param[in] la 1 based offset of next input stream element
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*
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* \return Next input character in internal ANTLR3 encoding (UTF32)
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*/
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static ANTLR3_UCHAR
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antlr38BitLA_ucase (pANTLR3_INT_STREAM is, ANTLR3_INT32 la)
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{
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pANTLR3_INPUT_STREAM input;
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input = ((pANTLR3_INPUT_STREAM) (is->super));
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if (( ((pANTLR3_UINT8)input->nextChar) + la - 1) >= (((pANTLR3_UINT8)input->data) + input->sizeBuf))
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{
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return ANTLR3_CHARSTREAM_EOF;
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}
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else
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{
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return (ANTLR3_UCHAR)toupper((*((pANTLR3_UINT8)input->nextChar + la - 1)));
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}
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}
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/** \brief Return the input element assuming an 8 bit ascii input
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*
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* \param[in] input Input stream context pointer
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* \param[in] lt 1 based offset of next input stream element
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*
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* \return Next input character in internal ANTLR3 encoding (UTF32)
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*/
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static void *
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antlr38BitLT(pANTLR3_INPUT_STREAM input, ANTLR3_INT32 lt)
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{
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/* Casting is horrible but it means no warnings and LT should never be called
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* on a character stream anyway I think. If it is then, the void * will need to be
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* cast back in a similar manner. Yuck! But this means that LT for Token streams and
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* tree streams is correct.
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*/
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return (ANTLR3_FUNC_PTR(input->istream->_LA(input->istream, lt)));
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}
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/** \brief Calculate the current index in the output stream.
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* \param[in] input Input stream context pointer
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*/
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static ANTLR3_MARKER
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antlr38BitIndex(pANTLR3_INT_STREAM is)
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{
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pANTLR3_INPUT_STREAM input;
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input = ((pANTLR3_INPUT_STREAM) (is->super));
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return (ANTLR3_MARKER)(((pANTLR3_UINT8)input->nextChar));
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}
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/** \brief Return the size of the current input stream, as an 8Bit file
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* which in this case is the total input. Other implementations may provide
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* more sophisticated implementations to deal with non-recoverable streams
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* and so on.
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*
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* \param[in] input Input stream context pointer
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*/
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static ANTLR3_UINT32
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antlr38BitSize(pANTLR3_INPUT_STREAM input)
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{
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return input->sizeBuf;
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}
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/** \brief Mark the current input point in an 8Bit 8 bit stream
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* such as a file stream, where all the input is available in the
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* buffer.
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*
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* \param[in] is Input stream context pointer
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*/
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static ANTLR3_MARKER
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antlr38BitMark (pANTLR3_INT_STREAM is)
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{
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pANTLR3_LEX_STATE state;
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pANTLR3_INPUT_STREAM input;
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input = ((pANTLR3_INPUT_STREAM) (is->super));
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/* New mark point
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*/
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++input->markDepth;
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/* See if we are revisiting a mark as we can just reuse the vector
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* entry if we are, otherwise, we need a new one
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*/
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if (input->markDepth > input->markers->count)
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{
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state = (pANTLR3_LEX_STATE)ANTLR3_MALLOC(sizeof(ANTLR3_LEX_STATE));
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if (state == NULL)
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{
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// malloc failed
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--input->markDepth;
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return 0;
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}
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/* Add it to the table
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*/
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input->markers->add(input->markers, state, ANTLR3_FREE_FUNC); /* No special structure, just free() on delete */
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}
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else
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{
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state = (pANTLR3_LEX_STATE)input->markers->get(input->markers, input->markDepth - 1);
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/* Assume no errors for speed, it will just blow up if the table failed
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* for some reasons, hence lots of unit tests on the tables ;-)
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*/
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}
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/* We have created or retrieved the state, so update it with the current
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* elements of the lexer state.
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*/
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state->charPositionInLine = input->charPositionInLine;
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state->currentLine = input->currentLine;
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state->line = input->line;
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state->nextChar = input->nextChar;
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is->lastMarker = input->markDepth;
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/* And that's it
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*/
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return input->markDepth;
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}
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/** \brief Rewind the lexer input to the state specified by the last produced mark.
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*
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* \param[in] input Input stream context pointer
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*
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* \remark
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* Assumes 8 Bit input stream.
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*/
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static void
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antlr38BitRewindLast (pANTLR3_INT_STREAM is)
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{
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is->rewind(is, is->lastMarker);
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}
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/** \brief Rewind the lexer input to the state specified by the supplied mark.
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*
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* \param[in] input Input stream context pointer
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*
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* \remark
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* Assumes 8 Bit input stream.
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*/
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static void
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antlr38BitRewind (pANTLR3_INT_STREAM is, ANTLR3_MARKER mark)
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{
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pANTLR3_LEX_STATE state;
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pANTLR3_INPUT_STREAM input;
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input = ((pANTLR3_INPUT_STREAM) is->super);
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/* Perform any clean up of the marks
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*/
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input->istream->release(input->istream, mark);
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/* Find the supplied mark state
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*/
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state = (pANTLR3_LEX_STATE)input->markers->get(input->markers, (ANTLR3_UINT32)(mark - 1));
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if (state == NULL) { return; }
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/* Seek input pointer to the requested point (note we supply the void *pointer
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* to whatever is implementing the int stream to seek).
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*/
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antlr38BitSeek(is, (ANTLR3_MARKER)(state->nextChar));
|
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/* Reset to the reset of the information in the mark
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*/
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input->charPositionInLine = state->charPositionInLine;
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input->currentLine = state->currentLine;
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input->line = state->line;
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input->nextChar = state->nextChar;
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/* And we are done
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*/
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}
|
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/** \brief Rewind the lexer input to the state specified by the supplied mark.
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*
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* \param[in] input Input stream context pointer
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*
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* \remark
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* Assumes 8 Bit input stream.
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*/
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static void
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antlr38BitRelease (pANTLR3_INT_STREAM is, ANTLR3_MARKER mark)
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{
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pANTLR3_INPUT_STREAM input;
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input = ((pANTLR3_INPUT_STREAM) (is->super));
|
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/* We don't do much here in fact as we never free any higher marks in
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* the hashtable as we just resuse any memory allocated for them.
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*/
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input->markDepth = (ANTLR3_UINT32)(mark - 1);
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}
|
|
/** \brief Rewind the lexer input to the state specified by the supplied mark.
|
*
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* \param[in] input Input stream context pointer
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*
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* \remark
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* Assumes 8 Bit input stream.
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*/
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static void
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antlr38BitSeek (pANTLR3_INT_STREAM is, ANTLR3_MARKER seekPoint)
|
{
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ANTLR3_INT32 count;
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pANTLR3_INPUT_STREAM input;
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input = (pANTLR3_INPUT_STREAM)ANTLR3_FUNC_PTR(((pANTLR3_INPUT_STREAM) is->super));
|
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/* If the requested seek point is less than the current
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* input point, then we assume that we are resetting from a mark
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* and do not need to scan, but can just set to there.
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*/
|
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 = (UTF16*)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 = (pANTLR3_UCHAR)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 = (pANTLR3_UCHAR)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 = (pANTLR3_UINT8)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 = (pANTLR3_UINT8)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))];
|
}
|
}
|
