usr/src/old/htable/scan.l

%{
/*-
 * Copyright (c) 1983 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef lint
static char sccsid[] = "@(#)scan.l      5.8 (Berkeley) 4/19/91";
#endif /* not lint */

extern int yylineno;
int yylineno = 1;

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

%%