%option noyywrap
%{
+
+#include <stdlib.h>
+#include <string.h>
+#ifndef __POSIX_VISIBLE
+#define fileno(x) 0
+#endif
+
#include "../lib/sstring.h"
#define YYSTYPE sstring *
extern YYSTYPE yylval;
#include "y.tab.h"
-
-#include <stdlib.h>
#include "../lib/stringbuf.h"
#define MAX_STR_CONST 512
+int lexpos, lexerror;
+
+#define addpos(x) lexpos+=x;
+#define incpos() addpos(1);
+
+void lexreset(void) {
+ lexerror = 0;
+ lexpos = -1;
+}
+
%}
digit [0-9]
char bufdata[MAX_STR_CONST];
StringBuf buf;
-\" {
+\" { incpos();
sbinit(&buf, bufdata, sizeof(bufdata));
BEGIN(str);
}
<str>{
- \" {
+ \" { incpos();
BEGIN(INITIAL);
sbterminate(&buf);
yylval = getsstring(bufdata, 512);
return STRING;
}
- \\\\ { sbaddchar(&buf, '\\'); }
- \\\" { sbaddchar(&buf, '"'); }
- [^\\] { sbaddchar(&buf, *yytext); }
+ \\\\ { addpos(2);
+ sbaddchar(&buf, '\\');
+ }
+ \\\" { addpos(2);
+ sbaddchar(&buf, '"');
+ }
+ [^\\] { incpos();
+ sbaddchar(&buf, *yytext);
+ }
}
-\' {
+\' { incpos();
sbinit(&buf, bufdata, sizeof(bufdata));
BEGIN(pascalstr);
}
<pascalstr>{
- \'\' { sbaddchar(&buf, '\''); }
- \' {
+ \'\' { addpos(2);
+ sbaddchar(&buf, '\'');
+ }
+ \' { incpos();
BEGIN(INITIAL);
sbterminate(&buf);
yylval = getsstring(bufdata, 512);
return STRING;
}
- . { sbaddchar(&buf, *yytext); }
+ . { incpos();
+ sbaddchar(&buf, *yytext);
+ }
}
-"(" { return LPAREN; }
-")" { return RPAREN; }
-[ \t]+ { return WHITESPACE; }
-{letter}+ {
+"(" { incpos();
+ return LPAREN;
+ }
+")" { incpos();
+ return RPAREN;
+ }
+[ \t]+ { addpos(strlen(yytext));
+ return WHITESPACE;
+ }
+({letter}|{digit}|[#\-\+\.\*])+ { addpos(strlen(yytext));
yylval = getsstring(yytext, 512);
return IDENTIFIER;
}
-[\n\r] /* ignore */;
+[\n\r] { incpos();
+ /* ignore */;
+ }
+
+. {
+ incpos();
+ lexerror = 1;
+ yyterminate();
+ }
<<EOF>> {
BEGIN(INITIAL);
yyterminate();
}
%%
+
+void ydummyfn(void) {
+ yyunput(0, NULL);
+}