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freebsd/games/atc/grammar.y
Jordan K. Hubbard 554eb505f8 Bring in the 4.4 Lite games directory, modulo man page changes and segregation
of the x11 based games.  I'm not going to tag the originals with bsd_44_lite
and do this in two stages since it's just not worth it for this collection,
and I've got directory renames to deal with that way.  Bleah.
Submitted by:	jkh
1994-09-04 04:03:31 +00:00

390 lines
8.2 KiB
Plaintext

/*-
* Copyright (c) 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Ed James.
*
* 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.
*/
/*
* Copyright (c) 1987 by Ed James, UC Berkeley. All rights reserved.
*
* Copy permission is hereby granted provided that this notice is
* retained on all partial or complete copies.
*
* For more info on this and all of my stuff, mail edjames@berkeley.edu.
*/
%token <ival> HeightOp
%token <ival> WidthOp
%token <ival> UpdateOp
%token <ival> NewplaneOp
%token <cval> DirOp
%token <ival> ConstOp
%token <ival> LineOp
%token <ival> AirportOp
%token <ival> BeaconOp
%token <ival> ExitOp
%union {
int ival;
char cval;
}
%{
#include "include.h"
#ifndef lint
static char sccsid[] = "@(#)grammar.y 8.1 (Berkeley) 5/31/93";
#endif /* not lint */
int errors = 0;
int line = 1;
%}
%%
file:
bunch_of_defs { if (checkdefs() < 0) return (errors); } bunch_of_lines
{
if (sp->num_exits + sp->num_airports < 2)
yyerror("Need at least 2 airports and/or exits.");
return (errors);
}
;
bunch_of_defs:
def bunch_of_defs
| def
;
def:
udef
| ndef
| wdef
| hdef
;
udef:
UpdateOp '=' ConstOp ';'
{
if (sp->update_secs != 0)
return (yyerror("Redefinition of 'update'."));
else if ($3 < 1)
return (yyerror("'update' is too small."));
else
sp->update_secs = $3;
}
;
ndef:
NewplaneOp '=' ConstOp ';'
{
if (sp->newplane_time != 0)
return (yyerror("Redefinition of 'newplane'."));
else if ($3 < 1)
return (yyerror("'newplane' is too small."));
else
sp->newplane_time = $3;
}
;
hdef:
HeightOp '=' ConstOp ';'
{
if (sp->height != 0)
return (yyerror("Redefinition of 'height'."));
else if ($3 < 3)
return (yyerror("'height' is too small."));
else
sp->height = $3;
}
;
wdef:
WidthOp '=' ConstOp ';'
{
if (sp->height != 0)
return (yyerror("Redefinition of 'width'."));
else if ($3 < 3)
return (yyerror("'width' is too small."));
else
sp->width = $3;
}
;
bunch_of_lines:
line bunch_of_lines
{}
| line
{}
;
line:
BeaconOp ':' Bpoint_list ';'
{}
| ExitOp ':' Epoint_list ';'
{}
| LineOp ':' Lline_list ';'
{}
| AirportOp ':' Apoint_list ';'
{}
;
Bpoint_list:
Bpoint Bpoint_list
{}
| Bpoint
{}
;
Bpoint:
'(' ConstOp ConstOp ')'
{
if (sp->num_beacons % REALLOC == 0) {
if (sp->beacon == NULL)
sp->beacon = (BEACON *) malloc((sp->num_beacons
+ REALLOC) * sizeof (BEACON));
else
sp->beacon = (BEACON *) realloc(sp->beacon,
(sp->num_beacons + REALLOC) *
sizeof (BEACON));
if (sp->beacon == NULL)
return (yyerror("No memory available."));
}
sp->beacon[sp->num_beacons].x = $2;
sp->beacon[sp->num_beacons].y = $3;
check_point($2, $3);
sp->num_beacons++;
}
;
Epoint_list:
Epoint Epoint_list
{}
| Epoint
{}
;
Epoint:
'(' ConstOp ConstOp DirOp ')'
{
int dir;
if (sp->num_exits % REALLOC == 0) {
if (sp->exit == NULL)
sp->exit = (EXIT *) malloc((sp->num_exits +
REALLOC) * sizeof (EXIT));
else
sp->exit = (EXIT *) realloc(sp->exit,
(sp->num_exits + REALLOC) *
sizeof (EXIT));
if (sp->exit == NULL)
return (yyerror("No memory available."));
}
dir = dir_no($4);
sp->exit[sp->num_exits].x = $2;
sp->exit[sp->num_exits].y = $3;
sp->exit[sp->num_exits].dir = dir;
check_edge($2, $3);
check_edir($2, $3, dir);
sp->num_exits++;
}
;
Apoint_list:
Apoint Apoint_list
{}
| Apoint
{}
;
Apoint:
'(' ConstOp ConstOp DirOp ')'
{
int dir;
if (sp->num_airports % REALLOC == 0) {
if (sp->airport == NULL)
sp->airport=(AIRPORT *)malloc((sp->num_airports
+ REALLOC) * sizeof(AIRPORT));
else
sp->airport = (AIRPORT *) realloc(sp->airport,
(sp->num_airports + REALLOC) *
sizeof(AIRPORT));
if (sp->airport == NULL)
return (yyerror("No memory available."));
}
dir = dir_no($4);
sp->airport[sp->num_airports].x = $2;
sp->airport[sp->num_airports].y = $3;
sp->airport[sp->num_airports].dir = dir;
check_point($2, $3);
check_adir($2, $3, dir);
sp->num_airports++;
}
;
Lline_list:
Lline Lline_list
{}
| Lline
{}
;
Lline:
'[' '(' ConstOp ConstOp ')' '(' ConstOp ConstOp ')' ']'
{
if (sp->num_lines % REALLOC == 0) {
if (sp->line == NULL)
sp->line = (LINE *) malloc((sp->num_lines +
REALLOC) * sizeof (LINE));
else
sp->line = (LINE *) realloc(sp->line,
(sp->num_lines + REALLOC) *
sizeof (LINE));
if (sp->line == NULL)
return (yyerror("No memory available."));
}
sp->line[sp->num_lines].p1.x = $3;
sp->line[sp->num_lines].p1.y = $4;
sp->line[sp->num_lines].p2.x = $7;
sp->line[sp->num_lines].p2.y = $8;
check_line($3, $4, $7, $8);
sp->num_lines++;
}
;
%%
check_edge(x, y)
{
if (!(x == 0) && !(x == sp->width - 1) &&
!(y == 0) && !(y == sp->height - 1))
yyerror("edge value not on edge.");
}
check_point(x, y)
{
if (x < 1 || x >= sp->width - 1)
yyerror("X value out of range.");
if (y < 1 || y >= sp->height - 1)
yyerror("Y value out of range.");
}
check_linepoint(x, y)
{
if (x < 0 || x >= sp->width)
yyerror("X value out of range.");
if (y < 0 || y >= sp->height)
yyerror("Y value out of range.");
}
check_line(x1, y1, x2, y2)
{
int d1, d2;
check_linepoint(x1, y1);
check_linepoint(x2, y2);
d1 = ABS(x2 - x1);
d2 = ABS(y2 - y1);
if (!(d1 == d2) && !(d1 == 0) && !(d2 == 0))
yyerror("Bad line endpoints.");
}
yyerror(s)
{
fprintf(stderr, "\"%s\": line %d: %s\n", file, line, s);
errors++;
return (errors);
}
check_edir(x, y, dir)
{
int bad = 0;
if (x == sp->width - 1)
x = 2;
else if (x != 0)
x = 1;
if (y == sp->height - 1)
y = 2;
else if (y != 0)
y = 1;
switch (x * 10 + y) {
case 00: if (dir != 3) bad++; break;
case 01: if (dir < 1 || dir > 3) bad++; break;
case 02: if (dir != 1) bad++; break;
case 10: if (dir < 3 || dir > 5) bad++; break;
case 11: break;
case 12: if (dir > 1 && dir < 7) bad++; break;
case 20: if (dir != 5) bad++; break;
case 21: if (dir < 5) bad++; break;
case 22: if (dir != 7) bad++; break;
default:
yyerror("Unknown value in checkdir! Get help!");
break;
}
if (bad)
yyerror("Bad direction for entrance at exit.");
}
check_adir(x, y, dir)
{
}
checkdefs()
{
int err = 0;
if (sp->width == 0) {
yyerror("'width' undefined.");
err++;
}
if (sp->height == 0) {
yyerror("'height' undefined.");
err++;
}
if (sp->update_secs == 0) {
yyerror("'update' undefined.");
err++;
}
if (sp->newplane_time == 0) {
yyerror("'newplane' undefined.");
err++;
}
if (err)
return (-1);
else
return (0);
}