2 * Copyright (c) 1990, 1993
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * @(#)grammar.y 8.1 (Berkeley) 5/31/93
33 * $DragonFly: src/games/atc/grammar.y,v 1.3 2006/08/08 15:03:02 pavalos Exp $
37 * Copyright (c) 1987 by Ed James, UC Berkeley. All rights reserved.
39 * Copy permission is hereby granted provided that this notice is
40 * retained on all partial or complete copies.
42 * For more info on this and all of my stuff, mail edjames@berkeley.edu.
45 %token <ival> HeightOp
47 %token <ival> UpdateOp
48 %token <ival> NewplaneOp
52 %token <ival> AirportOp
53 %token <ival> BeaconOp
63 extern int yylex(void);
65 static void check_edge(int, int);
66 static void check_point(int, int);
67 static void check_linepoint(int, int);
68 static void check_line(int, int, int, int);
69 static int yyerror(const char *);
70 static void check_edir(int, int, int);
71 static int checkdefs(void);
79 bunch_of_defs { if (checkdefs() < 0) return (errors); } bunch_of_lines
81 if (sp->num_exits + sp->num_airports < 2)
82 yyerror("Need at least 2 airports and/or exits.");
100 UpdateOp '=' ConstOp ';'
102 if (sp->update_secs != 0)
103 return (yyerror("Redefinition of 'update'."));
105 return (yyerror("'update' is too small."));
107 sp->update_secs = $3;
112 NewplaneOp '=' ConstOp ';'
114 if (sp->newplane_time != 0)
115 return (yyerror("Redefinition of 'newplane'."));
117 return (yyerror("'newplane' is too small."));
119 sp->newplane_time = $3;
124 HeightOp '=' ConstOp ';'
127 return (yyerror("Redefinition of 'height'."));
129 return (yyerror("'height' is too small."));
136 WidthOp '=' ConstOp ';'
139 return (yyerror("Redefinition of 'width'."));
141 return (yyerror("'width' is too small."));
155 BeaconOp ':' Bpoint_list ';'
157 | ExitOp ':' Epoint_list ';'
159 | LineOp ':' Lline_list ';'
161 | AirportOp ':' Apoint_list ';'
173 '(' ConstOp ConstOp ')'
175 if (sp->num_beacons % REALLOC == 0) {
176 if (sp->beacon == NULL)
177 sp->beacon = malloc((sp->num_beacons + REALLOC)
180 sp->beacon = realloc(sp->beacon,
181 (sp->num_beacons + REALLOC) *
183 if (sp->beacon == NULL)
184 return (yyerror("No memory available."));
186 sp->beacon[sp->num_beacons].x = $2;
187 sp->beacon[sp->num_beacons].y = $3;
201 '(' ConstOp ConstOp DirOp ')'
205 if (sp->num_exits % REALLOC == 0) {
206 if (sp->exit == NULL)
207 sp->exit = malloc((sp->num_exits + REALLOC) *
210 sp->exit = realloc(sp->exit, (sp->num_exits +
211 REALLOC) * sizeof(EXIT));
212 if (sp->exit == NULL)
213 return (yyerror("No memory available."));
216 sp->exit[sp->num_exits].x = $2;
217 sp->exit[sp->num_exits].y = $3;
218 sp->exit[sp->num_exits].dir = dir;
220 check_edir($2, $3, dir);
233 '(' ConstOp ConstOp DirOp ')'
237 if (sp->num_airports % REALLOC == 0) {
238 if (sp->airport == NULL)
239 sp->airport = malloc((sp->num_airports +
240 REALLOC) * sizeof(AIRPORT));
242 sp->airport = realloc(sp->airport,
243 (sp->num_airports + REALLOC) *
245 if (sp->airport == NULL)
246 return (yyerror("No memory available."));
249 sp->airport[sp->num_airports].x = $2;
250 sp->airport[sp->num_airports].y = $3;
251 sp->airport[sp->num_airports].dir = dir;
265 '[' '(' ConstOp ConstOp ')' '(' ConstOp ConstOp ')' ']'
267 if (sp->num_lines % REALLOC == 0) {
268 if (sp->line == NULL)
269 sp->line = malloc((sp->num_lines + REALLOC) *
272 sp->line = realloc(sp->line, (sp->num_lines +
273 REALLOC) * sizeof(LINE));
274 if (sp->line == NULL)
275 return (yyerror("No memory available."));
277 sp->line[sp->num_lines].p1.x = $3;
278 sp->line[sp->num_lines].p1.y = $4;
279 sp->line[sp->num_lines].p2.x = $7;
280 sp->line[sp->num_lines].p2.y = $8;
281 check_line($3, $4, $7, $8);
288 check_edge(int x, int y)
290 if (!(x == 0) && !(x == sp->width - 1) &&
291 !(y == 0) && !(y == sp->height - 1))
292 yyerror("edge value not on edge.");
296 check_point(int x, int y)
298 if (x < 1 || x >= sp->width - 1)
299 yyerror("X value out of range.");
300 if (y < 1 || y >= sp->height - 1)
301 yyerror("Y value out of range.");
305 check_linepoint(int x, int y)
307 if (x < 0 || x >= sp->width)
308 yyerror("X value out of range.");
309 if (y < 0 || y >= sp->height)
310 yyerror("Y value out of range.");
314 check_line(int x_1, int y_1, int x_2, int y_2)
318 check_linepoint(x_1, y_1);
319 check_linepoint(x_2, y_2);
324 if (!(d1 == d2) && !(d1 == 0) && !(d2 == 0))
325 yyerror("Bad line endpoints.");
329 yyerror(const char *s)
331 fprintf(stderr, "\"%s\": line %d: %s\n", filename, line, s);
338 check_edir(int x, int y, int dir)
342 if (x == sp->width - 1)
346 if (y == sp->height - 1)
351 switch (x * 10 + y) {
352 case 00: if (dir != 3) bad++; break;
353 case 01: if (dir < 1 || dir > 3) bad++; break;
354 case 02: if (dir != 1) bad++; break;
355 case 10: if (dir < 3 || dir > 5) bad++; break;
357 case 12: if (dir > 1 && dir < 7) bad++; break;
358 case 20: if (dir != 5) bad++; break;
359 case 21: if (dir < 5) bad++; break;
360 case 22: if (dir != 7) bad++; break;
362 yyerror("Unknown value in checkdir! Get help!");
366 yyerror("Bad direction for entrance at exit.");
374 if (sp->width == 0) {
375 yyerror("'width' undefined.");
378 if (sp->height == 0) {
379 yyerror("'height' undefined.");
382 if (sp->update_secs == 0) {
383 yyerror("'update' undefined.");
386 if (sp->newplane_time == 0) {
387 yyerror("'newplane' undefined.");