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. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * @(#)grammar.y 8.1 (Berkeley) 5/31/93
37 * $DragonFly: src/games/atc/grammar.y,v 1.3 2006/08/08 15:03:02 pavalos Exp $
41 * Copyright (c) 1987 by Ed James, UC Berkeley. All rights reserved.
43 * Copy permission is hereby granted provided that this notice is
44 * retained on all partial or complete copies.
46 * For more info on this and all of my stuff, mail edjames@berkeley.edu.
49 %token <ival> HeightOp
51 %token <ival> UpdateOp
52 %token <ival> NewplaneOp
56 %token <ival> AirportOp
57 %token <ival> BeaconOp
67 extern int yylex(void);
69 static void check_edge(int, int);
70 static void check_point(int, int);
71 static void check_linepoint(int, int);
72 static void check_line(int, int, int, int);
73 static int yyerror(const char *);
74 static void check_edir(int, int, int);
75 static int checkdefs(void);
83 bunch_of_defs { if (checkdefs() < 0) return (errors); } bunch_of_lines
85 if (sp->num_exits + sp->num_airports < 2)
86 yyerror("Need at least 2 airports and/or exits.");
104 UpdateOp '=' ConstOp ';'
106 if (sp->update_secs != 0)
107 return (yyerror("Redefinition of 'update'."));
109 return (yyerror("'update' is too small."));
111 sp->update_secs = $3;
116 NewplaneOp '=' ConstOp ';'
118 if (sp->newplane_time != 0)
119 return (yyerror("Redefinition of 'newplane'."));
121 return (yyerror("'newplane' is too small."));
123 sp->newplane_time = $3;
128 HeightOp '=' ConstOp ';'
131 return (yyerror("Redefinition of 'height'."));
133 return (yyerror("'height' is too small."));
140 WidthOp '=' ConstOp ';'
143 return (yyerror("Redefinition of 'width'."));
145 return (yyerror("'width' is too small."));
159 BeaconOp ':' Bpoint_list ';'
161 | ExitOp ':' Epoint_list ';'
163 | LineOp ':' Lline_list ';'
165 | AirportOp ':' Apoint_list ';'
177 '(' ConstOp ConstOp ')'
179 if (sp->num_beacons % REALLOC == 0) {
180 if (sp->beacon == NULL)
181 sp->beacon = (BEACON *) malloc((sp->num_beacons
182 + REALLOC) * sizeof (BEACON));
184 sp->beacon = (BEACON *) realloc(sp->beacon,
185 (sp->num_beacons + REALLOC) *
187 if (sp->beacon == NULL)
188 return (yyerror("No memory available."));
190 sp->beacon[sp->num_beacons].x = $2;
191 sp->beacon[sp->num_beacons].y = $3;
205 '(' ConstOp ConstOp DirOp ')'
209 if (sp->num_exits % REALLOC == 0) {
210 if (sp->exit == NULL)
211 sp->exit = (EXIT *) malloc((sp->num_exits +
212 REALLOC) * sizeof (EXIT));
214 sp->exit = (EXIT *) realloc(sp->exit,
215 (sp->num_exits + REALLOC) *
217 if (sp->exit == NULL)
218 return (yyerror("No memory available."));
221 sp->exit[sp->num_exits].x = $2;
222 sp->exit[sp->num_exits].y = $3;
223 sp->exit[sp->num_exits].dir = dir;
225 check_edir($2, $3, dir);
238 '(' ConstOp ConstOp DirOp ')'
242 if (sp->num_airports % REALLOC == 0) {
243 if (sp->airport == NULL)
244 sp->airport=(AIRPORT *)malloc((sp->num_airports
245 + REALLOC) * sizeof(AIRPORT));
247 sp->airport = (AIRPORT *) realloc(sp->airport,
248 (sp->num_airports + REALLOC) *
250 if (sp->airport == NULL)
251 return (yyerror("No memory available."));
254 sp->airport[sp->num_airports].x = $2;
255 sp->airport[sp->num_airports].y = $3;
256 sp->airport[sp->num_airports].dir = dir;
270 '[' '(' ConstOp ConstOp ')' '(' ConstOp ConstOp ')' ']'
272 if (sp->num_lines % REALLOC == 0) {
273 if (sp->line == NULL)
274 sp->line = (LINE *) malloc((sp->num_lines +
275 REALLOC) * sizeof (LINE));
277 sp->line = (LINE *) realloc(sp->line,
278 (sp->num_lines + REALLOC) *
280 if (sp->line == NULL)
281 return (yyerror("No memory available."));
283 sp->line[sp->num_lines].p1.x = $3;
284 sp->line[sp->num_lines].p1.y = $4;
285 sp->line[sp->num_lines].p2.x = $7;
286 sp->line[sp->num_lines].p2.y = $8;
287 check_line($3, $4, $7, $8);
294 check_edge(int x, int y)
296 if (!(x == 0) && !(x == sp->width - 1) &&
297 !(y == 0) && !(y == sp->height - 1))
298 yyerror("edge value not on edge.");
302 check_point(int x, int y)
304 if (x < 1 || x >= sp->width - 1)
305 yyerror("X value out of range.");
306 if (y < 1 || y >= sp->height - 1)
307 yyerror("Y value out of range.");
311 check_linepoint(int x, int y)
313 if (x < 0 || x >= sp->width)
314 yyerror("X value out of range.");
315 if (y < 0 || y >= sp->height)
316 yyerror("Y value out of range.");
320 check_line(int x_1, int y_1, int x_2, int y_2)
324 check_linepoint(x_1, y_1);
325 check_linepoint(x_2, y_2);
330 if (!(d1 == d2) && !(d1 == 0) && !(d2 == 0))
331 yyerror("Bad line endpoints.");
335 yyerror(const char *s)
337 fprintf(stderr, "\"%s\": line %d: %s\n", filename, line, s);
344 check_edir(int x, int y, int dir)
348 if (x == sp->width - 1)
352 if (y == sp->height - 1)
357 switch (x * 10 + y) {
358 case 00: if (dir != 3) bad++; break;
359 case 01: if (dir < 1 || dir > 3) bad++; break;
360 case 02: if (dir != 1) bad++; break;
361 case 10: if (dir < 3 || dir > 5) bad++; break;
363 case 12: if (dir > 1 && dir < 7) bad++; break;
364 case 20: if (dir != 5) bad++; break;
365 case 21: if (dir < 5) bad++; break;
366 case 22: if (dir != 7) bad++; break;
368 yyerror("Unknown value in checkdir! Get help!");
372 yyerror("Bad direction for entrance at exit.");
380 if (sp->width == 0) {
381 yyerror("'width' undefined.");
384 if (sp->height == 0) {
385 yyerror("'height' undefined.");
388 if (sp->update_secs == 0) {
389 yyerror("'update' undefined.");
392 if (sp->newplane_time == 0) {
393 yyerror("'newplane' undefined.");