More moves for Tool Packages
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lhauch
302
Tools/CCode/Source/Pccts/h/DLexerBase.cpp
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Tools/CCode/Source/Pccts/h/DLexerBase.cpp
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/* DLGLexerBase.c
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*
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* SOFTWARE RIGHTS
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*
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* We reserve no LEGAL rights to the Purdue Compiler Construction Tool
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* Set (PCCTS) -- PCCTS is in the public domain. An individual or
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* company may do whatever they wish with source code distributed with
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* PCCTS or the code generated by PCCTS, including the incorporation of
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* PCCTS, or its output, into commerical software.
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*
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* We encourage users to develop software with PCCTS. However, we do ask
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* that credit is given to us for developing PCCTS. By "credit",
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* we mean that if you incorporate our source code into one of your
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* programs (commercial product, research project, or otherwise) that you
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* acknowledge this fact somewhere in the documentation, research report,
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* etc... If you like PCCTS and have developed a nice tool with the
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* output, please mention that you developed it using PCCTS. In
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* addition, we ask that this header remain intact in our source code.
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* As long as these guidelines are kept, we expect to continue enhancing
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* this system and expect to make other tools available as they are
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* completed.
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*
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* ANTLR 1.33
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* Terence Parr
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* Parr Research Corporation
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* with Purdue University and AHPCRC, University of Minnesota
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* 1989-2000
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*/
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#include "pcctscfg.h"
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#include "pccts_stdio.h"
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#include "pccts_stdlib.h"
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PCCTS_NAMESPACE_STD
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/* I have to put this here due to C++ limitation
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* that you can't have a 'forward' decl for enums.
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* I hate C++!!!!!!!!!!!!!!!
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*/
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// MR1
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// MR1 10-Apr-97 133MR1 Prevent use of varying sizes for the
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// MR1 ANTLRTokenType enum
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// MR1
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enum ANTLRTokenType { TER_HATES_CPP=0, ITS_UTTER_GARBAGE, // MR1
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WITH_SOME_GOOD_IDEAS=9999}; // MR1
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#define ANTLR_SUPPORT_CODE
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#include "pcctscfg.h"
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#include DLEXERBASE_H
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#include APARSER_H // MR23
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DLGLexerBase::
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DLGLexerBase(DLGInputStream *in,
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unsigned bufsize,
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int _interactive,
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int _track_columns)
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{
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this->_bufsize = bufsize;
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this->_lextext = new DLGChar[_bufsize];
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if ( this->_lextext==NULL ) {
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panic("text buffer is NULL");
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}
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this->_begexpr = this->_endexpr = NULL;
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this->ch = this->bufovf = 0;
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this->nextpos = NULL;
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this->cl = 0;
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this->add_erase = 0;
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this->input = in;
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this->_begcol = 0;
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this->_endcol = 0;
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this->_line = 1;
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this->charfull = 0;
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this->automaton = 0;
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this->token_to_fill = NULL;
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this->interactive = _interactive;
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this->track_columns = _track_columns;
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this->debugLexerFlag = 0; // MR1
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this->parser = NULL; // MR1
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this->lexErrCount=0; // MR11
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}
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// MR19 THM
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void DLGLexerBase::reset()
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{
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this->charfull = 0;
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this->_begcol = 0;
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this->_endcol = 0;
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this->automaton = 0;
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this->_line=1;
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this->lexErrCount=0;
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}
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void DLGLexerBase::
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setInputStream( DLGInputStream *in )
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{
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this->input = in;
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_line = 1;
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charfull = 0;
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}
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/* saves dlg state, but not what feeds dlg (such as file position) */
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void DLGLexerBase::
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saveState(DLGState *state)
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{
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state->input = input;
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state->interactive = interactive;
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state->track_columns = track_columns;
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state->auto_num = automaton;
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state->add_erase = add_erase;
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state->lookc = ch;
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state->char_full = charfull;
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state->begcol = _begcol;
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state->endcol = _endcol;
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state->line = _line;
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state->lextext = _lextext;
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state->begexpr = _begexpr;
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state->endexpr = _endexpr;
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state->bufsize = _bufsize;
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state->bufovf = bufovf;
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state->nextpos = nextpos;
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state->class_num = cl;
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state->debugLexerFlag = debugLexerFlag; // MR1
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state->parser = parser; // MR1
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}
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void DLGLexerBase::
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restoreState(DLGState *state)
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{
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input = state->input;
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interactive = state->interactive;
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track_columns = state->track_columns;
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automaton = state->auto_num;
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add_erase = state->add_erase;
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ch = state->lookc;
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charfull = state->char_full;
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_begcol = state->begcol;
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_endcol = state->endcol;
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_line = state->line;
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_lextext = state->lextext;
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_begexpr = state->begexpr;
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_endexpr = state->endexpr;
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_bufsize = state->bufsize;
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bufovf = state->bufovf;
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nextpos = state->nextpos;
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cl = state->class_num;
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debugLexerFlag = state->debugLexerFlag; // MR1
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parser = state->parser; // MR1
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}
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/* erase what is currently in the buffer, and get a new reg. expr */
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void DLGLexerBase::
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skip()
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{
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add_erase = 1;
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}
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/* don't erase what is in the lextext buffer, add on to it */
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void DLGLexerBase::
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more()
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{
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add_erase = 2;
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}
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/* substitute c for the reg. expr last matched and is in the buffer */
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void DLGLexerBase::
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replchar(DLGChar c)
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{
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/* can't allow overwriting null at end of string */
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if (_begexpr < &_lextext[_bufsize-1]){
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*_begexpr = c;
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*(_begexpr+1) = '\0';
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}
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_endexpr = _begexpr;
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if (c != '\0') {
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nextpos = _begexpr + 1;
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}
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else {
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nextpos = _begexpr; /* MR30 Zero terminates string. */
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}
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}
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/* replace the string s for the reg. expr last matched and in the buffer */
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#ifdef _MSC_VER // MR23
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//Turn off "assignment within conditional expression" warning
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#pragma warning(disable : 4706)
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#endif
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void DLGLexerBase::
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replstr(const DLGChar *s) /* MR20 const */
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{
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register DLGChar *l= &_lextext[_bufsize -1];
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nextpos = _begexpr;
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if (s){
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while ((nextpos <= l) && (*(nextpos++) = *(s++))){
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/* empty */
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}
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/* correct for NULL at end of string */
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nextpos--;
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}
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if ((nextpos <= l) && (*(--s) == 0)){
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bufovf = 0;
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}else{
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bufovf = 1;
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}
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*(nextpos) = '\0';
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_endexpr = nextpos - 1;
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}
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#ifdef _MSC_VER // MR23
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#pragma warning(default: 4706)
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#endif
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void DLGLexerBase::
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errstd(const char *s) /* MR20 const */
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{
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lexErrCount++; /* MR11 */
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/* MR23 */ printMessage(stderr,
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"%s near line %d (text was '%s')\n",
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((s == NULL) ? "Lexical error" : s),
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_line,_lextext);
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}
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int DLGLexerBase::
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err_in()
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{
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/* MR23 */ printMessage(stderr,"No input stream, function, or string\n");
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/* return eof to get out gracefully */
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return EOF;
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}
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ANTLRTokenType DLGLexerBase::
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erraction()
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{
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errstd("invalid token");
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advance();
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skip();
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return (ANTLRTokenType) 0; // bogus, but satisfies compiler
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}
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_ANTLRTokenPtr DLGLexerBase::
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getToken()
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{
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if ( token_to_fill==NULL ) panic("NULL token_to_fill");
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ANTLRTokenType tt = nextTokenType();
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_ANTLRTokenPtr tk = token_to_fill->makeToken(tt, _lextext,_line);
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return tk;
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}
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void DLGLexerBase::
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panic(const char *msg) /* MR20 const */
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{
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if (parser) //MR23
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parser->panic(msg); //MR23
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else //MR23
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{
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/* MR23 */ printMessage(stderr, "DLG panic: %s\n", msg);
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//
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// 7-Apr-97 133MR1
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//
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exit(PCCTS_EXIT_FAILURE); // MR1
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}
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}
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ANTLRParser * DLGLexerBase:: // MR1
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setParser(ANTLRParser *p) { // MR1
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ANTLRParser *oldValue=parser; // MR1
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parser=p; // MR1
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return oldValue; // MR1
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} // MR1
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// MR1
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ANTLRParser * DLGLexerBase:: // MR1
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getParser() { // MR1
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return parser; // MR1
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} // MR1
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// MR1
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int DLGLexerBase:: // MR1
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debugLexer(int newValue) { // MR1
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int oldValue=debugLexerFlag; // MR1
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debugLexerFlag=newValue; // MR1
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return oldValue; // MR1
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} // MR1
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//MR23
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int DLGLexerBase::printMessage(FILE* pFile, const char* pFormat, ...)
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{
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va_list marker;
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va_start( marker, pFormat );
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int iRet = 0;
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if (parser)
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parser->printMessageV(pFile, pFormat, marker);
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else
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iRet = vfprintf(pFile, pFormat, marker);
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va_end( marker );
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return iRet;
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}
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