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/*
* $Id: $
* $Version: $
*
* Copyright (c) Tanel Tammet 2004,2005,2006,2007,2008,2009,2010
*
* Contact: tanel.tammet@gmail.com
*
* This file is part of WhiteDB
*
* WhiteDB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* WhiteDB is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with WhiteDB. If not, see <http://www.gnu.org/licenses/>.
*
*/
/** @file dbprolog.l
* Lexer rules for prolog parser
*
*/
%{
#include <math.h>
#include <stdio.h>
#include "dbprologparse.h"
#include "dbprolog.tab.h"
/* reentrant stuff starts */
#define PARM yyget_extra(yyscanner)
/*
#define YY_INPUT(buffer, res, max_size) \
do { \
if (PARM->pos >= PARM->length) \
res = YY_NULL; \
else \
{ \
res = PARM->length - PARM->pos; \
res > (int)max_size ? res = max_size : 0; \
memcpy(buffer, PARM->buf + PARM->pos, res); \
PARM->pos += res; \
} \
} while (0)
*/
char linebuf[1024];
char elmparsestrbuf[1024];
char *s;
%}
%option reentrant
%option bison-bridge
%option noyywrap
%option yylineno
%option nounput
%option noinput
%x SQLSTATE
%x STRSTATE
ATOM [a-z#][_a-zA-Z0-9]*
VAR [A-Z][_a-zA-Z0-9]*
%%
"%".*\n {
parseprintf("A lineful of comment.\n"); /* eat line comments */
}
:- {
parseprintf("A :- , \"IS\"\n");
return IS;
}
not {
parseprintf("A \"not\".\n");
return NOT;
}
{ATOM} {
parseprintf("An atom: %s\n", yytext);
*yylval=strdup(yytext);
return ATOM;
}
{VAR} {
parseprintf("A variable: %s\n", yytext);
*yylval=strdup(yytext);
return VAR;
}
[0-9]+ { parseprintf( "An integer: %s (%d)\n", yytext, atoi(yytext));
*yylval=strdup(yytext);
return INT;
}
[0-9]+"."[0-9]+ {
parseprintf( "A float: %s (%lf)\n", yytext, atof(yytext));
*yylval=strdup(yytext);
return FLOAT;
}
"'"[^']+"'" {
parseprintf("A \'-quoted string, basically an atom: %s\n", yytext);
*yylval = strdup(yytext) + 1; // erase the first character
((char*)*yylval)[strlen(*yylval) - 1] = '\0'; // erase the last character '
return ATOM;
}
"\""[^"]+"\"" {
parseprintf("A quoted string, basically an atom: %s\n", yytext);
*yylval = strdup(yytext); // erase the first character
//((char*)*yylval)[strlen(*yylval) - 1] = '\0'; // erase the last character '
return ATOM;
}
[)] return ')';
[(] return '(';
[,] return ',';
[.] return '.';
[;] return ';';
[!] return '!';
[~] return '~';
<<EOF>> {
parseprintf("file end. Read %d lines.\n", yylineno);
yyterminate();
return 0;
}
[\r\n] { yylineno++; }
[ \t]+ ;/* eat up whitespace */
. { parseprintf( "Unrecognized character: %s\n", yytext ); }
%%
void wg_yyprologerror(parse_parm* parm, void* scanner, char* msg) {
//printf("\n yyerror called with xx msg %s\n",msg);
printf("parse error at prolog file %s line %d text fragment %s: %s \n",
parm->filename,yyget_lineno(scanner),yyget_text(scanner),msg);
}
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