a0b295de08
+ doc/simplex.txt
+ Added 1st draft of SimpLex documentation.
* source/compiler/simplex.c
+ Added overidable macro STREAM_EXCEPTION()
* source/compiler/harbour.l
* Modified to return every \n to correct line numbers reporting.
/* Note: removed note about . after \n, I beleive it was needed to avoid conflict with $ which is no longer used,
and should be avoided, due to few other side effects. */
source/compiler/harbour.slx
* Standadized un-terminated strings messages.
1326 lines
37 KiB
C
1326 lines
37 KiB
C
/*
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* Copyright 2000 Ron Pinkas <ron@profit-master.com>
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* www - http://www.Profit-Master.com
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version, with one exception:
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*
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* The exception is that if you link this file with other files to produce
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* an executable, this does not by itself causes the resulting executable
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* to be covered by the GNU General Public License. Your use of that
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* executable is in no way restricted on account of linking this file.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA (or visit
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* their web site at http://www.gnu.org/).
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <limits.h>
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/* These are NOT overidable (yet). */
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#define MAX_MATCH 4
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#define TOKEN_SIZE 64
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/* Language Definitions Readability. */
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#define SELF_CONTAINED_WORDS_ARE LEX_WORD const aSelfs[] =
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#define LANGUAGE_KEY_WORDS_ARE LEX_WORD const aKeys[] =
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#define LANGUAGE_WORDS_ARE LEX_WORD const aWords[] =
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#define LANGUAGE_RULES_ARE int const aiRules[][ MAX_MATCH + 2 ] =
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#define ACCEPT_TOKEN_AND_DROP_DELIMITER_IF_ONE_OF_THESE(x) char const * szOmmit = x
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#define ACCEPT_TOKEN_AND_RETURN_DELIMITER_IF_ONE_OF_THESE(x) char const * szReturn = x
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#define DELIMITER_BELONGS_TO_TOKEN_IF_ONE_OF_THESE(x) char const * szAppend = x
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#define START_NEW_LINE_IF_ONE_OF_THESE(x) char const * szNewLine = x
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#define IF_SEQUENCE_IS(a, b, c, d) {a, b, c, d
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#define REDUCE_TO(x, y) ,x, y }
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#define PASS_THROUGH() ,0, 0 }
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#define LEX_WORD(x) {x
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#define AS_TOKEN(x) ,x }
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/* Streams ("Pairs"). */
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#define DEFINE_STREAM_AS_ONE_OF_THESE LEX_PAIR aPairs[] =
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#define START_WITH(x) { x,
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#define END_WITH(x) x,
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#define STOP_IF_ONE_OF_THESE(x) x,
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#define AND_IGNORE_DELIMITERS(x) x,
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#define AS_PAIR_TOKEN(x) x }
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#define STREAM_EXCEPTION( sPair, chrPair) \
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if( chrPair ) \
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printf( "Exception: %c for stream at: \"%s\"\n", chrPair, sPair ); \
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else \
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printf( "Exception: <EOF> for stream at: \"%s\"\n", chrPair, sPair ); \
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/* Pairs. */
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static char sPair[ 2048 ];
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static int iPairLen;
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static char cTerm;
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static BOOL bExclusive;
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static char * sExclude;
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static int iPairToken;
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/* Self Contained Words. */
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static char sSelf[ TOKEN_SIZE ];
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typedef struct _LEX_WORD
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{
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char sWord[ TOKEN_SIZE ];
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int iToken;
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} LEX_WORD; /* support structure for KEYS and WORDS */
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typedef struct _LEX_PAIR
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{
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char cStart;
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char cTerm;
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char sExclude[4];
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BOOL bExclusive;
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int iToken;
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} LEX_PAIR; /* support structure for KEYS and WORDS */
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#ifdef __cplusplus
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typedef struct yy_buffer_state *YY_BUFFER_STATE;
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#endif
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/* Above are NOT overidable !!! Need to precede the Language Definitions. */
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/* --------------------------------------------------------------------------------- */
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/* Overidables. */
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#define LEX_CUSTOM_ACTION -65
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#define ERR_TOO_COMPLEX_RULE -66
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#define YY_BUF_SIZE 16384
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#define INIT_ACTION()
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#define INTERCEPT_ACTION(x)
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#define CUSTOM_ACTION(x)
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#define NEW_LINE_ACTION()
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#define ELEMENT_TOKEN(x) -1
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#define DEBUG_INFO(x)
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#define LEX_CASE(x)
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/*
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* Can be used to indicate how many chars needed to qualify as an abbreviation for Key Words.
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*
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#define LEX_ABBREVIATE_KEYS
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#define LEX_ABBREVIATE_WORDS
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*/
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#include SLX_RULES
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/* Declarations. */
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FILE *yyin; /* currently yacc parsed file */
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extern void yyerror( char * ); /* parsing error management function */
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#ifdef __cplusplus
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extern "C" int yywrap( void );
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#else
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extern int yywrap( void ); /* manages the EOF of current processed file */
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#endif
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extern YYSTYPE yylval;
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/* Use prototypes in function declarations. */
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#define YY_USE_PROTOS
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#ifdef YY_USE_PROTOS
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#define YY_PROTO(proto) proto
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#else
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#define YY_PROTO(proto) ()
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#endif
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/* ---------------------------------------------------------------------------------------------- */
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#define LEX_RULE_SIZE ( sizeof( (int) iRet ) * ( MAX_MATCH + 2 ) )
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#define LEX_WORD_SIZE ( sizeof( LEX_WORD ) )
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#define LEX_PAIR_SIZE ( sizeof( LEX_PAIR ) )
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/* Using statics when we could use locals to eliminate Allocations and Deallocations each time the yylex is called and returns. */
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/* Look ahead Tokens. */
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static int iHold = 0;
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static int aiHold[4];
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static char asHold[4][ TOKEN_SIZE ];
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/* Pre-Checked Tokens. */
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static int iReturn = 0;
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static int aiReturn[4];
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/* Rules Support */
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static int aiMatched[ MAX_MATCH ];
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static int iMatched = 0;
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static int aiTentative[2] = { 0, 0 };
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static int iTentative = 0;
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static int aiProspects[ 256 ];
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static int iProspects = 0;
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static int iFound = 0;
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static int iReduce = 0;
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/* yylex */
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static char * tmpPtr;
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static char sToken[TOKEN_SIZE];
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static int iLen = 0;
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static char chr, cPrev = 0;
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static int iKey, iWord, iMatch, iRemove, iWordLen, iPush;
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static char szLexBuffer[ YY_BUF_SIZE ];
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static char * s_szBuffer;
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static int iSize = 0;
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static int iRet;
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static BOOL bTmp;
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/* Lex emulation */
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char * yytext;
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int yyleng;
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/* NewLine Support. */
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static BOOL bNewLine = TRUE, bStart = TRUE;
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static int iSelfs = (int) ( sizeof( aSelfs ) / LEX_WORD_SIZE );
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static int iKeys = (int) ( sizeof( aKeys ) / LEX_WORD_SIZE );
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static int iWords = (int) ( sizeof( aWords ) / LEX_WORD_SIZE );
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static int iRules = (int) ( sizeof( aiRules ) / LEX_RULE_SIZE );
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static int iPairs = (int) ( sizeof( aPairs ) / LEX_PAIR_SIZE );
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int Reduce( int iToken, BOOL bReal );
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/* --------------------------------------------------------------------------------- */
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/* MACROS. */
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/* Readability Macros. */
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#define LEX_RULE_SIZE ( sizeof( (int) iRet ) * ( MAX_MATCH + 2 ) )
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#define LEX_WORD_SIZE ( sizeof( LEX_WORD ) )
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#define LEX_PAIR_SIZE ( sizeof( LEX_PAIR ) )
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#define IF_TOKEN_READY() if( iReturn )
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#define IF_TOKEN_ON_HOLD() if( iHold )
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#define REDUCE( x ) Reduce( (x), TRUE )
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#define RESET_LEX() { iLen = 0; iMatched = 0; iHold = 0; iReturn = 0; bNewLine = TRUE; bStart = TRUE; }
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#define FORCE_REDUCE() Reduce( 0, TRUE )
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#define HOLD_TOKEN(x, y) \
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/* Last In, First Out */ \
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{ iRet = x ; aiHold[ iHold++ ] = iRet; \
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\
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if( y ) \
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{ \
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strcpy( asHold[ iHold - 1 ], y ); \
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} \
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else \
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{ \
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asHold[ iHold - 1 ][0] = '\0'; \
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} \
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\
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DEBUG_INFO( printf( "Placed on hold: %i Position %i Text: >%s<\n", iRet, iHold, asHold[ iHold - 1 ] ) ); \
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DEBUG_INFO( printf("Now Holding %i Tokens: %i %i %i %i\n", iHold, aiHold[0], aiHold[1], aiHold[2], aiHold[3] ) ); \
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}
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#define RETURN_TOKEN(x, y) \
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\
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iRet = (x); \
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if( (iRet) ) \
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{ \
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LEX_RETURN(iRet, y); \
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} \
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else \
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{ \
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goto Start; \
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}
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#define IF_NEWLINE(chr) \
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\
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tmpPtr = (char*) szNewLine; \
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while ( *tmpPtr && chr != *tmpPtr ) \
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{ \
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tmpPtr++; \
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} \
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/* NewLine Found?. */\
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if( *tmpPtr )
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#define IF_BEGIN_PAIR(chr) \
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{ register int iPair = 0;\
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\
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while( iPair < iPairs ) \
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{ \
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if( chr == aPairs[iPair].cStart ) \
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{ \
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/* Terminator to look for. */ \
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cTerm = aPairs[iPair].cTerm; \
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bExclusive = aPairs[iPair].bExclusive; \
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sExclude = (char *) aPairs[iPair].sExclude; \
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iPairToken = aPairs[iPair].iToken; \
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break; \
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} \
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iPair++; \
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} \
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bTmp = ( iPair < iPairs ); \
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\
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} \
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/* Begin New Pair. */ \
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if( bTmp )
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#define CHECK_SELF_CONTAINED(chr) \
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\
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DEBUG_INFO( printf( "Checking %i Selfs for %c At: >%s<\n", iSelfs, chr, szBuffer - 1 ) ); \
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\
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{\
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register int iSelf = 0, iSelfLen; \
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register char chrSelf; \
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\
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while( iSelf < iSelfs ) \
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{ \
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chrSelf = LEX_CASE(chr);\
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\
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if( chrSelf == aSelfs[iSelf].sWord[0] ) \
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{ \
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sSelf[0] = chrSelf; \
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iSelfLen = 1; \
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chrSelf = LEX_CASE( *szBuffer ); \
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\
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while( aSelfs[iSelf].sWord[iSelfLen] ) \
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{ \
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if( chrSelf == aSelfs[iSelf].sWord[iSelfLen] ) \
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{ \
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sSelf[ iSelfLen ] = chrSelf; \
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} \
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else \
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{ \
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break; \
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} \
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\
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iSelfLen++; \
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\
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/* TODO: worry about End of Buffer. */ \
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\
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/* Peek at Next Character. */ \
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chrSelf = LEX_CASE( *( szBuffer + iSelfLen - 1 ) ); \
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} \
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\
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/* Match */ \
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if( aSelfs[iSelf].sWord[iSelfLen] == '\0' ) \
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{ \
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/* Moving to next postion after the Self Contained Word. */ \
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szBuffer += ( iSelfLen - 1 ); \
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\
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sSelf[ iSelfLen ] = '\0'; \
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\
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if( iLen ) \
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{ \
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DEBUG_INFO( printf( "Holding Self >%s<\n", sSelf ) ); \
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\
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HOLD_TOKEN( aSelfs[iSelf].iToken, sSelf ); \
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\
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/* Terminate current token and check it. */ \
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sToken[ iLen ] = '\0'; \
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\
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/* Last charcter read. */\
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chr = chrSelf;\
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\
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goto CheckToken; \
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} \
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else \
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{ \
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DEBUG_INFO( printf( "Reducing Self >%s<\n", sSelf ) ); \
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\
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if( bNewLine )\
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{\
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bNewLine = FALSE;\
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NEW_LINE_ACTION();\
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}\
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\
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RETURN_TOKEN( REDUCE( aSelfs[iSelf].iToken ), sSelf ); \
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} \
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} \
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} \
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\
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iSelf++; \
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} \
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}
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#define IF_ABORT_PAIR(chrPair) \
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tmpPtr = sExclude; \
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while ( *tmpPtr && chrPair != *tmpPtr ) \
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{ \
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tmpPtr++; \
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} \
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\
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/* Exception. */ \
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if( *tmpPtr )
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#define IF_OMMIT(chr) \
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/* Delimiter to Ommit? */ \
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tmpPtr = (char*) szOmmit; \
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while ( *tmpPtr && chr != *tmpPtr ) \
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{ \
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tmpPtr++; \
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} \
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\
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/* Delimiter to Ommit found. */ \
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if ( *tmpPtr )
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#define IF_APPEND_DELIMITER(chr) \
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/* Delimiter to Append? */ \
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tmpPtr = (char*) szAppend; \
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while ( *tmpPtr && chr != *tmpPtr ) \
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{ \
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tmpPtr++; \
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} \
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\
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/* Delimiter to Append found. */ \
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if( *tmpPtr )
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#define IF_RETURN_DELIMITER(chr) \
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/* Returnable Delimiter? */ \
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tmpPtr = (char*) szReturn; \
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while ( *tmpPtr && chr != *tmpPtr ) \
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{ \
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tmpPtr++; \
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} \
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\
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/* Returnable Delimiter found. */ \
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if( *tmpPtr )
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#define IF_BELONG_LEFT(chr) \
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/* Give precedence to associate rules */ \
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DEBUG_INFO( printf( "Checking Left for: '%c' cPrev: '%c'\n", chr, cPrev ) ); \
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\
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if( iMatched && Reduce( chr, FALSE ) )
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#define RETURN_READY_TOKEN() \
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\
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/* Ready from previous call. */ \
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iReturn--; \
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iRet = aiReturn[iReturn]; \
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\
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DEBUG_INFO( printf( "Returning Ready: %i\n", iRet ) ); \
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\
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LEX_RETURN(iRet, NULL);
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#define RELEASE_TOKEN() \
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\
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/* Ready from previous call. */ \
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/* Last in First Out. */ \
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iHold--; \
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iRet = aiHold[iHold]; \
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if( asHold[iHold] ) \
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{ \
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strcpy( (char*) sToken, asHold[iHold] );\
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} \
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\
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DEBUG_INFO( printf( "Released %i Now Holding %i Tokens: %i %i %i %i\n", iRet, iHold, aiHold[0], aiHold[1], aiHold[2], aiHold[3] ) ); \
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\
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if( iRet == -1 && iMatched ) \
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{ \
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DEBUG_INFO( printf( "Reducing Held: <EOF>\n" ) ); \
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\
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/* Returning Pending Rule Match Tokens without further tests. */ \
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iMatch = 0; \
|
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while( iMatch < iMatched ) \
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{ \
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DEBUG_INFO( printf( "Returning Pending Match Tokens at: <EOF>\n" ) ); \
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\
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aiReturn[ iReturn++ ] = aiMatched[ iMatch ]; \
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iMatch++; \
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} \
|
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iMatched = 0;\
|
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goto Start;\
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} \
|
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else if( iRet == -1 ) \
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{ \
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RESET_LEX();\
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return -1; \
|
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}\
|
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else if( iRet < 256 )\
|
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{\
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IF_NEWLINE( (char) iRet )\
|
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{\
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bNewLine = TRUE;\
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}\
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else\
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{\
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bNewLine = FALSE;\
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}\
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}\
|
|
\
|
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DEBUG_INFO( printf( "Reducing Held: %i Pos: %i\n", iRet, iHold ) ); \
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\
|
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RETURN_TOKEN( REDUCE( iRet ), sToken );
|
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|
|
#define LEX_RETURN(x, y) \
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\
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if( x <= LEX_CUSTOM_ACTION ) \
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{ \
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CUSTOM_ACTION(x); \
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\
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|
if( x ) \
|
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{ \
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INTERCEPT_ACTION(x)\
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|
\
|
|
s_szBuffer = szBuffer;\
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|
\
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|
return x; \
|
|
} \
|
|
else \
|
|
{ \
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goto Start; \
|
|
} \
|
|
} \
|
|
else \
|
|
{ \
|
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DEBUG_INFO( printf( "Returning: %i\n", x ) ); \
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\
|
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INTERCEPT_ACTION(x)\
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\
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|
s_szBuffer = szBuffer;\
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|
\
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return x; \
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}
|
|
|
|
#define ACCEPT_TOKEN()\
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{\
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DEBUG_INFO( printf( "Accepting Token %i After Tokens: %i %i %i\n", iToken, aiMatched[0], aiMatched[1], aiMatched[2] ) );\
|
|
\
|
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if( iMatched == MAX_MATCH )\
|
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{\
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printf( "Maximum depth reached! Multiple Rules for same Tokens: %i %i %i %i - Please correct the rules.\n", aiMatched[0], aiMatched[1], aiMatched[2], aiMatched[3] );\
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\
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GIVE_UP();\
|
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}\
|
|
else\
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{\
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aiMatched[ iMatched++ ] = iToken;\
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}\
|
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}
|
|
|
|
#define FIND_MATCH()\
|
|
{\
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|
if( iProspects )\
|
|
{\
|
|
SCAN_PROSPECTS();\
|
|
}\
|
|
else\
|
|
{\
|
|
SCAN_RULES();\
|
|
}\
|
|
}
|
|
|
|
#define SCAN_PROSPECTS()\
|
|
{\
|
|
register int iScan = 0;\
|
|
\
|
|
DEBUG_INFO( printf( "Scaning %i Prospects for %i at Pos: %i\n", iProspects, iToken, iMatched ) ); \
|
|
\
|
|
iFound = 0;\
|
|
while( iScan < iProspects )\
|
|
{\
|
|
if( aiRules[ aiProspects[iScan] ][ iMatched ] == iToken )\
|
|
{\
|
|
/* No more Tokens - Rule Match. */\
|
|
\
|
|
if( iMatched == MAX_MATCH - 1 || aiRules[ aiProspects[iScan] ][ iMatched + 1 ] == 0 )\
|
|
{\
|
|
iFound++;\
|
|
iReduce = aiProspects[iScan];\
|
|
}\
|
|
else\
|
|
{\
|
|
/* Already in prospect list - still a prospect, do nothing. */\
|
|
}\
|
|
}\
|
|
else\
|
|
{\
|
|
/* No longer a prospect. */\
|
|
REMOVE_PROSPECT(iScan);\
|
|
\
|
|
/* Has to continue without increasing the counter, because of side effect of REMOVE_PROSPECT(). */\
|
|
continue;\
|
|
}\
|
|
\
|
|
iScan++;\
|
|
}\
|
|
\
|
|
if( iProspects == 1 && iFound )\
|
|
{\
|
|
/* Already counted as a FOUND. */\
|
|
if( bReal )\
|
|
{\
|
|
iProspects = 0;\
|
|
}\
|
|
}\
|
|
}
|
|
|
|
#define SCAN_RULES()\
|
|
{\
|
|
register int iScan = 0;\
|
|
\
|
|
DEBUG_INFO( printf( "Scaning %i Rules for %i at Pos: %i\n", iRules, iToken, iMatched ) ); \
|
|
\
|
|
iFound = 0;\
|
|
iProspects = 0;\
|
|
while( iScan < iRules )\
|
|
{\
|
|
/* No prospects means we only search 1st Token of Rules. */\
|
|
if( aiRules[iScan][0] == iToken )\
|
|
{\
|
|
\
|
|
/* No more Tokens - Rule Match. */\
|
|
if( aiRules[iScan][1] == 0 )\
|
|
{\
|
|
iReduce = iScan;\
|
|
iFound++;\
|
|
}\
|
|
else\
|
|
{\
|
|
/* Adding this Rule to the Prospects List. */\
|
|
ADD_PROSPECT(iScan);\
|
|
}\
|
|
}\
|
|
\
|
|
iScan++;\
|
|
}\
|
|
}
|
|
|
|
#define ADD_PROSPECT(iScan)\
|
|
{\
|
|
aiProspects[ iProspects++ ] = iScan;\
|
|
}
|
|
|
|
#define REMOVE_PROSPECT(iScan)\
|
|
{\
|
|
DEBUG_INFO( printf( "Removing Prospect: %i Of: %i\n", iScan, iProspects ) );\
|
|
\
|
|
aiProspects[iProspects--] = 0;\
|
|
iRemove = iScan;\
|
|
while( iRemove < iProspects )\
|
|
{\
|
|
/* iProspectNo is already Zero Based. */\
|
|
aiProspects[ iRemove ] = aiProspects[ iRemove + 1 ];\
|
|
\
|
|
iRemove++;\
|
|
}\
|
|
}
|
|
|
|
#define REVERT_OR_GIVEUP()\
|
|
{\
|
|
DEBUG_INFO( printf( "Revert Or Giveup for %i After %i %i %i\n", iToken, aiMatched[0], aiMatched[1], aiMatched[2] ) );\
|
|
\
|
|
/* Have to push the unmatched Token first, so it will Pop LAST after the Left Shift of reverted Tokens. */\
|
|
\
|
|
/* Avoid infinite loop, don't push if this is the only Token, it will be returned instead. */\
|
|
\
|
|
/* iToken maybe ZERO indicating REDUCTION to be FORCED. */\
|
|
if( iMatched && iToken )\
|
|
{\
|
|
PUSH_TOKEN( iToken );\
|
|
}\
|
|
\
|
|
if( iTentative )\
|
|
{\
|
|
if( iMatched > iTentative )\
|
|
{\
|
|
/* Unused Tokens must be pushed before the reduction, so the Reductions will be Poped First. */\
|
|
\
|
|
DEBUG_INFO( printf( "Reverting from %i to %i Shifting to Reductions: %i %i\n", iMatched, iTentative, aiTentative[0], aiTentative[1] ) );\
|
|
\
|
|
/* iTentative is Zero Based, iMatched is 1 Based, but iMatched not increased yet for the unmatched Token. */\
|
|
\
|
|
/* Shift unused Token[s] Left. */\
|
|
PUSH_UN_MATCHED( iMatched - iTentative );\
|
|
}\
|
|
\
|
|
/* Will put the Reductions back into the Hold Stack to support Recursive Rules. */\
|
|
REDUCE_TENTATIVE();\
|
|
\
|
|
CLEAN_UP();\
|
|
}\
|
|
else\
|
|
{\
|
|
/* Will get rid of the 1st (Left) Token and will shift the unmatched Tokens 1 position to the left.\
|
|
So we will start again with the First unmatched Token. */\
|
|
\
|
|
GIVE_UP();\
|
|
}\
|
|
}
|
|
|
|
#define REDUCE_TENTATIVE()\
|
|
{\
|
|
/* If Associate Left than don't reduce. */\
|
|
if( aiTentative[0] )\
|
|
{\
|
|
DEBUG_INFO( printf( "Reducing Tentative for %i Matches to %i %i\n", iTentative, aiTentative[0], aiTentative[1] ) );\
|
|
\
|
|
/* Have to push from Right to Left so Last pushed will be First poped. */\
|
|
if( aiTentative[1] )\
|
|
{\
|
|
PUSH_TOKEN( aiTentative[1] );\
|
|
aiTentative[1] = 0;\
|
|
}\
|
|
\
|
|
PUSH_TOKEN( aiTentative[0] );\
|
|
aiTentative[0] = 0;\
|
|
}\
|
|
else\
|
|
{\
|
|
DEBUG_INFO( printf( "Returning Tentative for %i Matches, Associate Left of %i %i %i\n", iTentative, aiMatched[0], aiMatched[1], aiMatched[2] ) );\
|
|
\
|
|
/* Can't have the last Item becuase we just failed a rule. */ \
|
|
\
|
|
if( aiMatched[ 2 ] )\
|
|
{\
|
|
aiReturn[ iReturn++ ] = aiMatched[ 2 ];\
|
|
}\
|
|
if( aiMatched[ 1 ] )\
|
|
{\
|
|
aiReturn[ iReturn++ ] = aiMatched[ 1 ];\
|
|
}\
|
|
aiReturn[ iReturn++ ] = aiMatched[ 0 ];\
|
|
}\
|
|
}
|
|
|
|
#define PUSH_UN_MATCHED( iHowMany ) /* Shift Left. */\
|
|
{\
|
|
iPush = iHowMany;\
|
|
while( iPush )\
|
|
{\
|
|
iPush--;\
|
|
iMatched--;\
|
|
PUSH_TOKEN( aiMatched[ iMatched ] );\
|
|
}\
|
|
}
|
|
|
|
#define PUSH_TOKEN( iPushToken )\
|
|
{\
|
|
aiHold[ iHold++ ] = iPushToken;\
|
|
\
|
|
/* We don't know what was the text value of this Token any more. */\
|
|
asHold[ iHold - 1 ][0] = '\0'; \
|
|
}
|
|
|
|
#define SAVE_TENTATIVE()\
|
|
{\
|
|
iTentative = iMatched;\
|
|
aiTentative[1] = aiRules[ iReduce ][ MAX_MATCH + 1 ];\
|
|
aiTentative[0] = aiRules[ iReduce ][ MAX_MATCH ];\
|
|
}
|
|
|
|
#define GIVE_UP()\
|
|
{\
|
|
/* We may have Tokens to shift Left. */\
|
|
if( iMatched == 0)\
|
|
{\
|
|
CLEAN_UP();\
|
|
\
|
|
return iToken;\
|
|
}\
|
|
else if( iMatched == 1 )\
|
|
{\
|
|
iRet = aiMatched[0];\
|
|
\
|
|
CLEAN_UP();\
|
|
\
|
|
return iRet;\
|
|
}\
|
|
else\
|
|
{\
|
|
DEBUG_INFO( printf( "Shifting Left %i Tokens\n", iMatched - 1 ) );\
|
|
\
|
|
if( iMatched > 1 )\
|
|
{\
|
|
PUSH_UN_MATCHED( iMatched - 1 );\
|
|
}\
|
|
\
|
|
iRet = aiMatched[0];\
|
|
\
|
|
CLEAN_UP();\
|
|
\
|
|
return iRet;\
|
|
}\
|
|
}
|
|
|
|
#define CLEAN_UP()\
|
|
{\
|
|
iMatched = 0;\
|
|
iTentative = 0;\
|
|
aiMatched[0] = 0;\
|
|
aiMatched[1] = 0;\
|
|
aiMatched[2] = 0;\
|
|
aiMatched[3] = 0;\
|
|
}
|
|
|
|
#define REDUCE_RULE()\
|
|
{\
|
|
/* If Associate Left than don't push reduce, pass through. */\
|
|
\
|
|
if( aiRules[ iReduce ][ MAX_MATCH ] )\
|
|
{\
|
|
DEBUG_INFO( printf( "Reducing: %i %i %i %i Shifting To: %i %i\n", aiMatched[0], aiMatched[1], aiMatched[2], aiMatched[3], aiRules[ iReduce ][ MAX_MATCH ], aiRules[ iReduce ][ MAX_MATCH + 1 ] ) );\
|
|
\
|
|
/* Have to push from Right to Left so Last pushed will be First poped. */\
|
|
if( aiRules[ iReduce ][ MAX_MATCH + 1 ] )\
|
|
{\
|
|
PUSH_TOKEN( aiRules[ iReduce ][ MAX_MATCH + 1 ] );\
|
|
}\
|
|
PUSH_TOKEN( aiRules[ iReduce ][ MAX_MATCH ] );\
|
|
\
|
|
/* Dispose of tokens and reset. */ \
|
|
CLEAN_UP();\
|
|
}\
|
|
else\
|
|
{\
|
|
DEBUG_INFO( printf( "Associating Left: %i %i %i %i Shifting To: New Token %i\n", aiMatched[0], aiMatched[1], aiMatched[2], aiMatched[3], iToken ) );\
|
|
\
|
|
/* Have to push from Right to Left so Last pushed will be First poped. */\
|
|
if( aiMatched[ 3 ] )\
|
|
{\
|
|
aiReturn[ iReturn++ ] = aiMatched[ 3 ];\
|
|
}\
|
|
if( aiMatched[ 2 ] )\
|
|
{\
|
|
aiReturn[ iReturn++ ] = aiMatched[ 2 ];\
|
|
}\
|
|
if( aiMatched[ 1 ] )\
|
|
{\
|
|
aiReturn[ iReturn++ ] = aiMatched[ 1 ];\
|
|
}\
|
|
aiReturn[ iReturn++ ] = aiMatched[ 0 ];\
|
|
\
|
|
/* Dispose of tokens and reset. */ \
|
|
CLEAN_UP();\
|
|
}\
|
|
}
|
|
|
|
int yylex( void )
|
|
{
|
|
register char * szBuffer = s_szBuffer;
|
|
|
|
Start:
|
|
IF_TOKEN_READY()
|
|
{
|
|
RETURN_READY_TOKEN();
|
|
}
|
|
|
|
IF_TOKEN_ON_HOLD()
|
|
{
|
|
RELEASE_TOKEN();
|
|
}
|
|
|
|
if( iSize == 0 )
|
|
{
|
|
/*
|
|
if( szLexBuffer == NULL )
|
|
{
|
|
szLexBuffer = malloc( YY_BUF_SIZE );
|
|
}
|
|
|
|
if( yytext == NULL )
|
|
{
|
|
yytext = malloc( YY_BUF_SIZE );
|
|
}
|
|
*/
|
|
|
|
if( bStart )
|
|
{
|
|
bStart = FALSE;
|
|
INIT_ACTION();
|
|
}
|
|
|
|
YY_INPUT( (char*) szLexBuffer, iSize, YY_BUF_SIZE );
|
|
|
|
if( iSize )
|
|
{
|
|
szBuffer = (char*) szLexBuffer;
|
|
|
|
DEBUG_INFO( printf( "New Buffer: >%s<\n", szBuffer ) );
|
|
}
|
|
else
|
|
{
|
|
if( iMatched )
|
|
{
|
|
/* Returning Pending Rule Match Tokens without further tests. */ \
|
|
iMatch = 0; \
|
|
while( iMatch < iMatched ) \
|
|
{ \
|
|
DEBUG_INFO( printf( "Returning Pending Match Tokens at: <EOF>\n" ) ); \
|
|
\
|
|
aiReturn[ iReturn++ ] = aiMatched[ iMatch ]; \
|
|
iMatch++; \
|
|
} \
|
|
iMatched = 0;\
|
|
goto Start;\
|
|
}
|
|
|
|
DEBUG_INFO( printf( "Returning: <EOF>\n" ) );
|
|
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
iLen = 0;
|
|
yyleng = 0;
|
|
|
|
while ( 1 )
|
|
{
|
|
if ( iSize && *szBuffer )
|
|
{
|
|
cPrev = chr;
|
|
|
|
/* Get next character. */
|
|
iSize--;
|
|
chr = LEX_CASE(*szBuffer++) ;
|
|
|
|
//DEBUG_INFO( printf( "Char: %c\n", chr ) );
|
|
|
|
IF_OMMIT(chr)
|
|
{
|
|
if ( iLen )
|
|
{
|
|
/* Terminate current token and check it. */
|
|
sToken[ iLen ] = '\0';
|
|
|
|
DEBUG_INFO( printf( "Token: \"%s\" Ommited: \'%c\'\n", sToken, chr ) );
|
|
|
|
goto CheckToken;
|
|
}
|
|
else
|
|
{
|
|
continue;
|
|
}
|
|
}
|
|
|
|
CHECK_SELF_CONTAINED(chr);
|
|
|
|
/* Soft Pair Terminator ? */
|
|
if ( cTerm && chr == cTerm )
|
|
{
|
|
/* Reset. */
|
|
cTerm = 0;
|
|
|
|
/* Terminate current token and check it. */
|
|
sToken[ iLen++ ] = chr;
|
|
sToken[ iLen ] = '\0';
|
|
|
|
DEBUG_INFO( printf( "Pair at %c = %s\n", chr, sToken ) );
|
|
|
|
goto CheckToken;
|
|
}
|
|
|
|
//DEBUG_INFO( printf( "Scaning Pairs >%s< for %c\n", szPairs1, chr ) );
|
|
|
|
/* New Pair ? */
|
|
IF_BEGIN_PAIR( chr )
|
|
{
|
|
if( iLen )
|
|
{
|
|
/* Resume here on next call. */
|
|
szBuffer--;
|
|
iSize++;
|
|
cTerm = 0;
|
|
/* So cPrev will remain intact. */
|
|
chr = cPrev;
|
|
|
|
DEBUG_INFO( printf( "Pushed back: '%c' Buffer = >%s<\n", chr, szBuffer ) );
|
|
|
|
/* Terminate and Check Token to the left. */
|
|
sToken[ iLen ] = '\0';
|
|
|
|
DEBUG_INFO( printf( "Token: \"%s\" before New Pair at: \'%c\'\n", sToken, chr ) );
|
|
|
|
goto CheckToken ;
|
|
}
|
|
|
|
IF_BELONG_LEFT( chr )
|
|
{
|
|
DEBUG_INFO( printf( "Reducing Left '%c'\n", chr ) );
|
|
cTerm = 0;
|
|
RETURN_TOKEN( REDUCE( (int) chr ), NULL );
|
|
}
|
|
|
|
/* Soft ? */
|
|
if ( bExclusive )
|
|
{
|
|
{
|
|
register int iPairLen = 0;
|
|
register char chrPair;
|
|
|
|
/* Look for the terminator. */
|
|
while ( *szBuffer )
|
|
{
|
|
/* Next Character. */
|
|
chrPair = *szBuffer++ ;
|
|
|
|
//DEBUG_INFO( printf( "Checking: '%c' in Exclusive Pair\n", chrPair ) );
|
|
|
|
/* Check if exception. */
|
|
IF_ABORT_PAIR( chrPair )
|
|
{
|
|
sPair[ iPairLen ] = '\0';
|
|
|
|
STREAM_EXCEPTION( sPair, chrPair);
|
|
|
|
/* Resetting. */
|
|
cTerm = 0;
|
|
|
|
/* Last charcter read. */
|
|
chr = chrPair;
|
|
|
|
goto on_error;
|
|
}
|
|
/* Terminator found. */
|
|
else if( chrPair == cTerm )
|
|
{
|
|
sPair[ iPairLen ] = '\0';
|
|
|
|
DEBUG_INFO( printf( "Returning Pair = >%s<\n", sPair ) );
|
|
|
|
/* Resetting. */
|
|
cTerm = 0;
|
|
|
|
/* Last charcter read. */
|
|
chr = chrPair;
|
|
|
|
if( bNewLine )
|
|
{
|
|
bNewLine = FALSE;
|
|
NEW_LINE_ACTION();
|
|
}
|
|
|
|
/* LITERAL */
|
|
RETURN_TOKEN( REDUCE( iPairToken ), NULL );
|
|
}
|
|
else
|
|
{
|
|
//DEBUG_INFO( printf( "Adding %c to Pair Pos: %i\n", chrPair, iPairLen ) );
|
|
|
|
/* Accumulating. */
|
|
sPair[ iPairLen++ ] = chrPair;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* EOF */
|
|
STREAM_EXCEPTION( sPair, NULL );
|
|
|
|
/* Resetting. */
|
|
cTerm = 0;
|
|
|
|
goto on_error;
|
|
}
|
|
else
|
|
{
|
|
DEBUG_INFO( printf( "Opened Pair, looking for: %c\n", cTerm ) );
|
|
|
|
sToken[iLen++] = chr;
|
|
|
|
/* Scan next charcter. */
|
|
continue;
|
|
}
|
|
}
|
|
/* End Pairs. */
|
|
|
|
/* NewLine ? */
|
|
IF_NEWLINE( chr )
|
|
{
|
|
if( iLen )
|
|
{
|
|
/* Will return NewLine on next call. */
|
|
HOLD_TOKEN(chr, NULL);
|
|
|
|
/* Terminate current token and check it. */
|
|
sToken[ iLen ] = '\0';
|
|
|
|
DEBUG_INFO( printf( "Token: \"%s\" at <NewLine> Holding: \'%c\'\n", sToken, chr ) );
|
|
|
|
goto CheckToken;
|
|
}
|
|
else
|
|
{
|
|
DEBUG_INFO( printf( "Reducing NewLine '%c'\n", chr ) );
|
|
bNewLine = TRUE;
|
|
RETURN_TOKEN( REDUCE( (int) chr ), NULL );
|
|
}
|
|
}
|
|
|
|
IF_APPEND_DELIMITER( chr )
|
|
{
|
|
/* Append and Terminate current token and check it. */
|
|
sToken[ iLen++ ] = chr;
|
|
sToken[ iLen ] = '\0';
|
|
|
|
DEBUG_INFO( printf( "Token: \"%s\" Appended: \'%c\'\n", sToken, chr ) );
|
|
|
|
goto CheckToken;
|
|
}
|
|
|
|
IF_RETURN_DELIMITER( chr )
|
|
{
|
|
if( iLen )
|
|
{
|
|
/* Will be rturned on next cycle. */
|
|
HOLD_TOKEN(chr, NULL);
|
|
|
|
/* Terminate current token and check it. */
|
|
sToken[ iLen ] = '\0';
|
|
|
|
DEBUG_INFO( printf( "Token: \"%s\" Holding: \'%c\'\n", sToken, chr ) );
|
|
|
|
goto CheckToken;
|
|
}
|
|
else
|
|
{
|
|
DEBUG_INFO( printf( "Reducing Delimiter: '%c'\n", chr ) );
|
|
|
|
if( bNewLine )
|
|
{
|
|
bNewLine = FALSE;
|
|
NEW_LINE_ACTION();
|
|
}
|
|
|
|
RETURN_TOKEN( REDUCE( (int) chr ), NULL );
|
|
}
|
|
}
|
|
|
|
/* Acumulate and scan next Charcter. */
|
|
sToken[ iLen++ ] = chr;
|
|
|
|
//DEBUG_INFO( printf( "Added: %c\n", chr ) );
|
|
|
|
continue;
|
|
}
|
|
else
|
|
{
|
|
YY_INPUT( (char*) szLexBuffer, iSize, YY_BUF_SIZE );
|
|
|
|
if( iSize )
|
|
{
|
|
szBuffer = (char*) szLexBuffer;
|
|
continue;
|
|
}
|
|
else
|
|
{
|
|
/* <EOF> */
|
|
HOLD_TOKEN(-1, NULL);
|
|
|
|
/* Terminate current token and check it. */
|
|
sToken[ iLen ] = '\0';
|
|
|
|
DEBUG_INFO( printf( "Token: \"%s\" At: \'<EOF>\'\n", sToken ) );
|
|
|
|
goto Start;
|
|
}
|
|
}
|
|
|
|
on_error:
|
|
continue;
|
|
|
|
CheckToken:
|
|
{
|
|
#ifdef LEX_ABBREVIATE_KEYS
|
|
iWordLen = strlen( (char*) sToken );
|
|
|
|
if( iWordLen < LEX_ABBREVIATE_KEYS )
|
|
{
|
|
iWordLen = LEX_ABBREVIATE_KEYS;
|
|
}
|
|
#endif
|
|
|
|
iKey = 0;
|
|
while ( bNewLine && iKey < iKeys )
|
|
{
|
|
//DEBUG_INFO( printf( "Comparing: \"%s\" and \"%s\"\n", sToken, aTokens[iKey] ) );
|
|
|
|
#ifdef LEX_ABBREVIATE_KEYS
|
|
if( strncmp( (char*) sToken, (char*)( aKeys[ iKey++ ].sWord ), iWordLen ) == 0 )
|
|
#else
|
|
if( strcmp( (char*) sToken, (char*) ( aKeys[ iKey++ ].sWord ) ) == 0 )
|
|
#endif
|
|
{
|
|
DEBUG_INFO( printf( "Reducing Key Word: %s\n", (char*) sToken ) );
|
|
|
|
bNewLine = FALSE;
|
|
NEW_LINE_ACTION();
|
|
|
|
RETURN_TOKEN( REDUCE( aKeys[ iKey - 1 ].iToken ), (char*) sToken );
|
|
}
|
|
}
|
|
|
|
if( bNewLine )
|
|
{
|
|
bNewLine = FALSE;
|
|
NEW_LINE_ACTION();
|
|
}
|
|
|
|
#ifdef LEX_ABBREVIATE_WORDS
|
|
iWordLen = strlen( (char*) sToken );
|
|
|
|
if( iWordLen < LEX_ABBREVIATE_WORDS )
|
|
{
|
|
iWordLen = LEX_ABBREVIATE_WORDS;
|
|
}
|
|
#endif
|
|
|
|
iWord = 0;
|
|
while ( iWord < iWords )
|
|
{
|
|
#ifdef LEX_ABBREVIATE_WORDS
|
|
if( strncmp( (char*) sToken, (char*) ( aWords[ iWord++ ].sWord ), iWordLen ) == 0 )
|
|
#else
|
|
if( strcmp( (char*) sToken, (char*) ( aWords[ iWord++ ].sWord ) ) == 0 )
|
|
#endif
|
|
{
|
|
DEBUG_INFO( printf( "Reducing Word: %s\n", (char*) sToken ) );
|
|
|
|
RETURN_TOKEN( REDUCE( aWords[ iWord - 1 ].iToken ), (char*) sToken );
|
|
}
|
|
}
|
|
|
|
DEBUG_INFO( printf( "Reducing Element: \"%s\"\n", (char*) sToken ) );
|
|
|
|
/* "Returns" the Token as iRet. */
|
|
ELEMENT_TOKEN( sToken )
|
|
|
|
RETURN_TOKEN( REDUCE( iRet ), sToken );
|
|
}
|
|
}
|
|
}
|
|
|
|
int Reduce( int iToken, BOOL bReal )
|
|
{
|
|
/* The search rutine will "return" the number of Matches in iFound, number of Prospects in iProspects, and the last
|
|
(and hopefuly only) Matched Rule No in iReduce. */
|
|
|
|
if( iToken )
|
|
{
|
|
DEBUG_INFO( printf( "Checking Token: %i After %i %i %i at Pos: %i\n", iToken, aiMatched[0], aiMatched[1], aiMatched[2], iMatched ) );
|
|
|
|
FIND_MATCH();
|
|
}
|
|
else
|
|
{
|
|
DEBUG_INFO( printf( "Reduced Forced After %i %i %i at Pos: %i\n", aiMatched[0], aiMatched[1], aiMatched[2], iMatched ) );
|
|
|
|
/* Force Reduce was requested. */
|
|
iFound = 0;
|
|
iProspects = 0;
|
|
}
|
|
|
|
if( ! bReal )
|
|
{
|
|
return ( iFound || iProspects );
|
|
}
|
|
|
|
DEBUG_INFO( printf( "Found %i Rules and %i Prospects for Token %i After %i %i %i\n", iFound, iProspects, iToken, aiMatched[0], aiMatched[1], aiMatched[2] ) );
|
|
|
|
/* Pass through. */
|
|
if( iMatched == 0 && iFound == 0 && iProspects == 0 )
|
|
{
|
|
DEBUG_INFO( printf( "Passed Through Token %i After %i %i %i\n", iToken, aiMatched[0], aiMatched[1], aiMatched[2] ) );
|
|
return iToken;
|
|
}
|
|
|
|
if( iFound || iProspects )
|
|
{
|
|
/* Adding to Matched List. */
|
|
ACCEPT_TOKEN();
|
|
}
|
|
|
|
switch( iFound )
|
|
{
|
|
/* Match Failed. */
|
|
case 0 :
|
|
if( iProspects )
|
|
{
|
|
/* Can't reduce yet, can't "bookmark" possible reduction either, must continue checking. */
|
|
|
|
return 0;
|
|
}
|
|
else
|
|
{
|
|
REVERT_OR_GIVEUP();
|
|
return 0;
|
|
}
|
|
|
|
case 1 :
|
|
if( iProspects )
|
|
{
|
|
/* Can't reduce yet, "bookmark" possible reduction here, and continue checking. */
|
|
|
|
SAVE_TENTATIVE();
|
|
|
|
return 0;
|
|
}
|
|
else
|
|
{
|
|
/* One Match and no additional Prospects - we can reduce. */
|
|
|
|
REDUCE_RULE();
|
|
|
|
return 0;
|
|
}
|
|
|
|
default :
|
|
if( iProspects )
|
|
{
|
|
/* Can't reduce yet, and can't "bookmark" possible reduction either, must continue checking. */
|
|
|
|
return 0;
|
|
}
|
|
else
|
|
{
|
|
printf( "Multiple Rules for same Tokens: %i %i %i %i - Please correct the rules.\n", aiMatched[0], aiMatched[1], aiMatched[2], aiMatched[3] );
|
|
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
#ifdef __cplusplus
|
|
YY_BUFFER_STATE yy_create_buffer( FILE * pFile, int iBufSize )
|
|
#else
|
|
void * yy_create_buffer( FILE * pFile, int iBufSize )
|
|
#endif
|
|
{
|
|
HB_SYMBOL_UNUSED( pFile );
|
|
HB_SYMBOL_UNUSED( iBufSize );
|
|
iSize = 0;
|
|
|
|
#ifdef __cplusplus
|
|
return (YY_BUFFER_STATE) szLexBuffer;
|
|
#else
|
|
return (void*) szLexBuffer;
|
|
#endif
|
|
}
|
|
|
|
#ifdef __cplusplus
|
|
void yy_switch_to_buffer( YY_BUFFER_STATE pBuffer )
|
|
#else
|
|
void yy_switch_to_buffer( void * pBuffer )
|
|
#endif
|
|
{
|
|
HB_SYMBOL_UNUSED( pBuffer );
|
|
FORCE_REDUCE();
|
|
iSize = 0;
|
|
}
|
|
|
|
#ifdef __cplusplus
|
|
void yy_delete_buffer( YY_BUFFER_STATE pBuffer )
|
|
#else
|
|
void yy_delete_buffer( void * pBuffer )
|
|
#endif
|
|
{
|
|
HB_SYMBOL_UNUSED( pBuffer );
|
|
FORCE_REDUCE();
|
|
iSize = 0;
|
|
}
|