usr/src/old/htable/scan.l

%{

/*
 * Copyright (c) 1983 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#ifndef lint
static char sccsid[] = "@(#)scan.l      5.6 (Berkeley) %G%";
#endif /* not lint */

#include "y.tab.h"
#include "htable.h"
%}

BLANK   [ \t]
DIGIT   [0-9]
ALPHA   [A-Za-z]
ANUM    [0-9A-Za-z]
NAMECHR [0-9A-Za-z./-]

%%
"NET"           {
                        yylval.number = KW_NET;
                        return (KEYWORD);
                }

"GATEWAY"       {
                        yylval.number = KW_GATEWAY;
                        return (KEYWORD);
                }

"HOST"          {
                        yylval.number = KW_HOST;
                        return (KEYWORD);
                }

{ALPHA}{NAMECHR}*{ANUM} {
                        yylval.namelist = newname(yytext);
                        return (NAME);
                }

{ALPHA}         {
                        yylval.namelist = newname(yytext);
                        return (NAME);
                }

{DIGIT}+{ALPHA}{NAMECHR}* {
                        fprintf(stderr, "Warning: nonstandard name \"%s\"\n",
                                yytext);
                        yylval.namelist = newname(yytext);
                        return (NAME);
                }

{DIGIT}+        {
                        yylval.number = atoi(yytext);
                        return (NUMBER);
                }

"."             return ('.');
":"             return (':');
","             return (',');
"/"             return ('/');
";".*           ;
"\n"{BLANK}+    ;
{BLANK}+        ;
"\n"            return (END);
.               fprintf(stderr, "Illegal char: '%s'\n", yytext);

%%

yywrap()
{
        return (1);
}