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
36 * Copyright (c) 1987 by Ed James, UC Berkeley. All rights reserved.
38 * Copy permission is hereby granted provided that this notice is
39 * retained on all partial or complete copies.
41 * For more info on this and all of my stuff, mail edjames@berkeley.edu.
44 %token <ival> HeightOp
46 %token <ival> UpdateOp
47 %token <ival> NewplaneOp
51 %token <ival> AirportOp
52 %token <ival> BeaconOp
62 #if YYPATCH < 20180510
63 extern int yylex(void);
66 static void check_edge(int, int);
67 static void check_point(int, int);
68 static void check_linepoint(int, int);
69 static void check_line(int, int, int, int);
70 static int yyerror(const char *);
71 static void check_edir(int, int, int);
72 static int checkdefs(void);
80 bunch_of_defs { if (checkdefs() < 0) return (errors); } bunch_of_lines
82 if (sp->num_exits + sp->num_airports < 2)
83 yyerror("Need at least 2 airports and/or exits.");
101 UpdateOp '=' ConstOp ';'
103 if (sp->update_secs != 0)
104 return (yyerror("Redefinition of 'update'."));
106 return (yyerror("'update' is too small."));
108 sp->update_secs = $3;
113 NewplaneOp '=' ConstOp ';'
115 if (sp->newplane_time != 0)
116 return (yyerror("Redefinition of 'newplane'."));
118 return (yyerror("'newplane' is too small."));
120 sp->newplane_time = $3;
125 HeightOp '=' ConstOp ';'
128 return (yyerror("Redefinition of 'height'."));
130 return (yyerror("'height' is too small."));
137 WidthOp '=' ConstOp ';'
140 return (yyerror("Redefinition of 'width'."));
142 return (yyerror("'width' is too small."));
156 BeaconOp ':' Bpoint_list ';'
158 | ExitOp ':' Epoint_list ';'
160 | LineOp ':' Lline_list ';'
162 | AirportOp ':' Apoint_list ';'
174 '(' ConstOp ConstOp ')'
176 if (sp->num_beacons % REALLOC == 0) {
177 if (sp->beacon == NULL)
178 sp->beacon = malloc((sp->num_beacons + REALLOC)
181 sp->beacon = realloc(sp->beacon,
182 (sp->num_beacons + REALLOC) *
184 if (sp->beacon == NULL)
185 return (yyerror("No memory available."));
187 sp->beacon[sp->num_beacons].x = $2;
188 sp->beacon[sp->num_beacons].y = $3;
202 '(' ConstOp ConstOp DirOp ')'
206 if (sp->num_exits % REALLOC == 0) {
207 if (sp->exit == NULL)
208 sp->exit = malloc((sp->num_exits + REALLOC) *
211 sp->exit = realloc(sp->exit, (sp->num_exits +
212 REALLOC) * sizeof(EXIT));
213 if (sp->exit == NULL)
214 return (yyerror("No memory available."));
217 sp->exit[sp->num_exits].x = $2;
218 sp->exit[sp->num_exits].y = $3;
219 sp->exit[sp->num_exits].dir = dir;
221 check_edir($2, $3, dir);
234 '(' ConstOp ConstOp DirOp ')'
238 if (sp->num_airports % REALLOC == 0) {
239 if (sp->airport == NULL)
240 sp->airport = malloc((sp->num_airports +
241 REALLOC) * sizeof(AIRPORT));
243 sp->airport = realloc(sp->airport,
244 (sp->num_airports + REALLOC) *
246 if (sp->airport == NULL)
247 return (yyerror("No memory available."));
250 sp->airport[sp->num_airports].x = $2;
251 sp->airport[sp->num_airports].y = $3;
252 sp->airport[sp->num_airports].dir = dir;
266 '[' '(' ConstOp ConstOp ')' '(' ConstOp ConstOp ')' ']'
268 if (sp->num_lines % REALLOC == 0) {
269 if (sp->line == NULL)
270 sp->line = malloc((sp->num_lines + REALLOC) *
273 sp->line = realloc(sp->line, (sp->num_lines +
274 REALLOC) * sizeof(LINE));
275 if (sp->line == NULL)
276 return (yyerror("No memory available."));
278 sp->line[sp->num_lines].p1.x = $3;
279 sp->line[sp->num_lines].p1.y = $4;
280 sp->line[sp->num_lines].p2.x = $7;
281 sp->line[sp->num_lines].p2.y = $8;
282 check_line($3, $4, $7, $8);
289 check_edge(int x, int y)
291 if (!(x == 0) && !(x == sp->width - 1) &&
292 !(y == 0) && !(y == sp->height - 1))
293 yyerror("edge value not on edge.");
297 check_point(int x, int y)
299 if (x < 1 || x >= sp->width - 1)
300 yyerror("X value out of range.");
301 if (y < 1 || y >= sp->height - 1)
302 yyerror("Y value out of range.");
306 check_linepoint(int x, int y)
308 if (x < 0 || x >= sp->width)
309 yyerror("X value out of range.");
310 if (y < 0 || y >= sp->height)
311 yyerror("Y value out of range.");
315 check_line(int x_1, int y_1, int x_2, int y_2)
319 check_linepoint(x_1, y_1);
320 check_linepoint(x_2, y_2);
325 if (!(d1 == d2) && !(d1 == 0) && !(d2 == 0))
326 yyerror("Bad line endpoints.");
330 yyerror(const char *s)
332 fprintf(stderr, "\"%s\": line %d: %s\n", filename, line, s);
339 check_edir(int x, int y, int dir)
343 if (x == sp->width - 1)
347 if (y == sp->height - 1)
352 switch (x * 10 + y) {
353 case 00: if (dir != 3) bad++; break;
354 case 01: if (dir < 1 || dir > 3) bad++; break;
355 case 02: if (dir != 1) bad++; break;
356 case 10: if (dir < 3 || dir > 5) bad++; break;
358 case 12: if (dir > 1 && dir < 7) bad++; break;
359 case 20: if (dir != 5) bad++; break;
360 case 21: if (dir < 5) bad++; break;
361 case 22: if (dir != 7) bad++; break;
363 yyerror("Unknown value in checkdir! Get help!");
367 yyerror("Bad direction for entrance at exit.");
375 if (sp->width == 0) {
376 yyerror("'width' undefined.");
379 if (sp->height == 0) {
380 yyerror("'height' undefined.");
383 if (sp->update_secs == 0) {
384 yyerror("'update' undefined.");
387 if (sp->newplane_time == 0) {
388 yyerror("'newplane' undefined.");