%option nounput
%{
//
//  tikzparser.l
//  TikZiT
//  
//  Copyright 2010 Chris Heunen. All rights reserved.
//  
//  
//  This file is part of TikZiT.
//  
//  TikZiT 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.
//  
//  TikZiT 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 TikZiT.  If not, see <http://www.gnu.org/licenses/>.
//  

#import <Foundation/Foundation.h>
#ifdef __APPLE__
#include "y.tab.h"
#else
#include "tikzparser.h"
#endif


%}
%%
\n                             /* ignore end of line */;
[ \t]+                         /* ignore whitespace */;
\\begin                        return LATEXBEGIN;
\\end                          return LATEXEND;
\{tikzpicture\}                return TIKZPICTURE;
\{pgfonlayer\}                 return PGFONLAYER;
\.center                       return ANCHORCENTER;
\(                             return LEFTPARENTHESIS;
\)                             return RIGHTPARENTHESIS;		       
\[                             return LEFTBRACKET;
\]                             return RIGHTBRACKET;
;                              return SEMICOLON;
,                              return COMMA;
=                              return EQUALS;
\\draw                         return DRAW;
to                             return TO;
\\node                         return NODE;
\\path                         return PATH;
node                           return ALTNODE;
rectangle                      return RECTANGLE;
at                             return AT;

[0-9]+ {
	yylval.nsstr=[NSString stringWithUTF8String:yytext];
	return NATURALNUMBER;
}

(\-?[0-9]*\.[0-9]+)|(\-?[0-9]+) {
	yylval.nsstr=[NSString stringWithUTF8String:yytext];
	return REALNUMBER;
}

\\?[a-zA-Z<>\-\']+ { //'
	yylval.nsstr=[NSString stringWithUTF8String:yytext];
	return LWORD;
}


\"[^\"]*\" /* " */ {
	yylval.nsstr=[NSString stringWithUTF8String:yytext];
	return QUOTEDSTRING;
}

\{ {
	NSMutableString *buf = [NSMutableString string];
	unsigned int brace_depth = 1;
	while (1) {
		char c = input();
		// eof reached before closing brace
		if (c == '\0' || c == EOF) yyterminate();

		if (c == '{') brace_depth++;
		else if (c == '}') {
			brace_depth--;
			if (brace_depth == 0) break;
		}
		[buf appendFormat:@"%c", c];
	}
	
	NSString *s = [buf copy];
	[s autorelease];
	yylval.nsstr = s;
	return DELIMITEDSTRING;
}

 /* vi:ft=lex:noet:ts=4:sts=4:sw=4:
 */