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Lex Description | 1991-04-19 | 3.6 KB | 165 lines |
- %{
-
- /*
- * Copyright (c) 1983 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[] = "@(#)parse.y 5.5 (Berkeley) 6/1/90";
- #endif /* not lint */
-
- #include "htable.h"
- %}
-
- %union {
- int number;
- struct addr *addrlist;
- struct name *namelist;
- }
- %start Table
-
- %token END
- %token <number> NUMBER KEYWORD
- %token <namelist> NAME
-
- %type <namelist> Names Cputype Opsys Protos Proto
- %type <addrlist> Addresses Address
- %%
- Table : Entry
- | Table Entry
- ;
-
- Entry : KEYWORD ':' Addresses ':' Names ':' END
- = {
- do_entry($1, $3, $5, NONAME, NONAME, NONAME);
- }
- | KEYWORD ':' Addresses ':' Names ':' Cputype ':' END
- = {
- do_entry($1, $3, $5, $7, NONAME, NONAME);
- }
- | KEYWORD ':' Addresses ':' Names ':' Cputype ':' Opsys ':' END
- = {
- do_entry($1, $3, $5, $7, $9, NONAME);
- }
- | KEYWORD ':' Addresses ':' Names ':' Cputype ':' Opsys ':' ':' END
- = {
- do_entry($1, $3, $5, $7, $9, NONAME);
- }
- | KEYWORD ':' Addresses ':' Names ':' Cputype ':' Opsys ':' Protos ':' END
- = {
- do_entry($1, $3, $5, $7, $9, $11);
- }
- | error END
- | END /* blank line */
- ;
-
- Addresses: Address
- = {
- $$ = $1;
- }
- | Address ',' Addresses
- = {
- $1->addr_link = $3;
- $$ = $1;
- }
- ;
-
- Address : NUMBER '.' NUMBER '.' NUMBER '.' NUMBER
- = {
- char *a;
-
- $$ = (struct addr *)malloc(sizeof (struct addr));
- a = (char *)&($$->addr_val);
- a[0] = $1; a[1] = $3; a[2] = $5; a[3] = $7;
- $$->addr_link = NOADDR;
- }
- ;
-
- Names : NAME
- = {
- $$ = $1;
- }
- | NAME ',' Names
- = {
- $1->name_link = $3;
- $$ = $1;
- }
- ;
-
- Cputype : /* empty */
- = {
- $$ = NONAME;
- }
- | NAME
- = {
- $$ = $1;
- }
- ;
-
- Opsys : /* empty */
- = {
- $$ = NONAME;
- }
- | NAME
- = {
- $$ = $1;
- }
- ;
-
- Protos : Proto
- = {
- $$ = $1;
- }
- | Proto ',' Protos
- = {
- $1->name_link = $3;
- $$ = $1;
- }
- ;
-
- Proto : NAME
- = {
- $$ = $1;
- }
- ;
- %%
-
- #include <stdio.h>
-
- extern int yylineno;
-
- yyerror(msg)
- char *msg;
- {
- fprintf(stderr, "\"%s\", line %d: %s\n", infile, yylineno, msg);
- }
-