4.3BSD-Reno/src/usr.sbin/htable/parse.y

%{

/*
 * Copyright (c) 1983 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted provided
 * that: (1) source distributions retain this entire copyright notice and
 * comment, and (2) distributions including binaries display the following
 * acknowledgement:  ``This product includes software developed by the
 * University of California, Berkeley and its contributors'' in the
 * documentation or other materials provided with the distribution and in
 * all advertising materials mentioning features or use of this software.
 * 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#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);
}