1 |
#include "stack.h" |
2 |
#include "messages.h" |
3 |
|
4 |
/* Print newline. */ |
5 |
extern void nl(environment *env) |
6 |
{ |
7 |
printf("\n"); |
8 |
} |
9 |
|
10 |
/* Print a newline to a port */ |
11 |
extern void nlport(environment *env) |
12 |
{ |
13 |
if(check_args(env, port, empty)) |
14 |
return printerr(env); |
15 |
|
16 |
if(fprintf(CAR(env->head)->content.p, "\n") < 0){ |
17 |
perror("nl"); |
18 |
env->err= 5; |
19 |
return; |
20 |
} |
21 |
toss(env); |
22 |
} |
23 |
|
24 |
/* Gets the type of a value */ |
25 |
extern void type(environment *env) |
26 |
{ |
27 |
|
28 |
if(check_args(env, unknown, empty)) |
29 |
return printerr(env); |
30 |
|
31 |
switch(CAR(env->head)->type){ |
32 |
case empty: |
33 |
push_sym(env, "empty"); |
34 |
break; |
35 |
case unknown: |
36 |
push_sym(env, "unknown"); |
37 |
break; |
38 |
case integer: |
39 |
push_sym(env, "integer"); |
40 |
break; |
41 |
case tfloat: |
42 |
push_sym(env, "float"); |
43 |
break; |
44 |
case string: |
45 |
push_sym(env, "string"); |
46 |
break; |
47 |
case symb: |
48 |
push_sym(env, "symbol"); |
49 |
break; |
50 |
case func: |
51 |
push_sym(env, "function"); |
52 |
break; |
53 |
case tcons: |
54 |
push_sym(env, "pair"); |
55 |
break; |
56 |
case port: |
57 |
push_sym(env, "port"); |
58 |
break; |
59 |
} |
60 |
swap(env); |
61 |
if (env->err) return; |
62 |
toss(env); |
63 |
} |
64 |
|
65 |
/* Print the top element of the stack but don't discard it */ |
66 |
extern void print_(environment *env) |
67 |
{ |
68 |
|
69 |
if(check_args(env, unknown, empty)) |
70 |
return printerr(env); |
71 |
|
72 |
print_val(env, CAR(env->head), 0, NULL, stdout); |
73 |
if(env->err) return; |
74 |
nl(env); |
75 |
} |
76 |
|
77 |
/* Prints the top element of the stack */ |
78 |
extern void print(environment *env) |
79 |
{ |
80 |
print_(env); |
81 |
if(env->err) return; |
82 |
toss(env); |
83 |
} |
84 |
|
85 |
/* Print the top element of the stack without quotes, but don't |
86 |
discard it. */ |
87 |
extern void princ_(environment *env) |
88 |
{ |
89 |
|
90 |
if(check_args(env, unknown, empty)) |
91 |
return printerr(env); |
92 |
|
93 |
print_val(env, CAR(env->head), 1, NULL, stdout); |
94 |
} |
95 |
|
96 |
/* Prints the top element of the stack without quotes. */ |
97 |
extern void princ(environment *env) |
98 |
{ |
99 |
princ_(env); |
100 |
if(env->err) return; |
101 |
toss(env); |
102 |
} |
103 |
|
104 |
/* Print a value to a port, but don't discard it */ |
105 |
extern void printport_(environment *env) |
106 |
{ |
107 |
|
108 |
if(check_args(env, port, unknown, empty)) |
109 |
return printerr(env); |
110 |
|
111 |
print_val(env, CAR(CDR(env->head)), 0, NULL, CAR(env->head)->content.p); |
112 |
if(env->err) return; |
113 |
nlport(env); |
114 |
} |
115 |
|
116 |
/* Print a value to a port */ |
117 |
extern void printport(environment *env) |
118 |
{ |
119 |
printport_(env); |
120 |
if(env->err) return; |
121 |
toss(env); |
122 |
} |
123 |
|
124 |
/* Print, without quotes, to a port, a value, but don't discard it. */ |
125 |
extern void princport_(environment *env) |
126 |
{ |
127 |
|
128 |
if(check_args(env, port, unknown, empty)) |
129 |
return printerr(env); |
130 |
|
131 |
print_val(env, CAR(CDR(env->head)), 1, NULL, CAR(env->head)->content.p); |
132 |
toss(env); if(env->err) return; |
133 |
} |
134 |
|
135 |
/* Print, without quotes, to a port, the top element. */ |
136 |
extern void princport(environment *env) |
137 |
{ |
138 |
princport_(env); |
139 |
if(env->err) return; |
140 |
toss(env); |
141 |
} |
142 |
|
143 |
/* Rotate the first three elements on the stack. */ |
144 |
extern void rot(environment *env) |
145 |
{ |
146 |
value *temp= env->head; |
147 |
|
148 |
if(check_args(env, unknown, unknown, unknown, empty)) |
149 |
return printerr(env); |
150 |
|
151 |
env->head= CDR(CDR(env->head)); |
152 |
CDR(CDR(temp))= CDR(env->head); |
153 |
CDR(env->head)= temp; |
154 |
} |
155 |
|
156 |
/* Relocate elements of the list on the stack. */ |
157 |
extern void expand(environment *env) |
158 |
{ |
159 |
value *temp, *new_head; |
160 |
|
161 |
if(check_args(env, tcons, empty)) |
162 |
return printerr(env); |
163 |
|
164 |
rev(env); |
165 |
|
166 |
if(env->err) |
167 |
return; |
168 |
|
169 |
/* The first list element is the new stack head */ |
170 |
new_head= temp= CAR(env->head); |
171 |
|
172 |
toss(env); |
173 |
|
174 |
/// XXX |
175 |
/* Find the end of the list */ |
176 |
while(CDR(temp)->type != empty) { |
177 |
if (CDR(temp)->type == tcons) |
178 |
temp= CDR(temp); |
179 |
else { |
180 |
env->err= 2; /* Improper list */ |
181 |
return printerr(env); |
182 |
} |
183 |
} |
184 |
|
185 |
/* Connect the tail of the list with the old stack head */ |
186 |
CDR(temp)= env->head; |
187 |
env->head= new_head; /* ...and voila! */ |
188 |
|
189 |
} |
190 |
|
191 |
/* Compares two elements by reference. */ |
192 |
extern void eq(environment *env) |
193 |
{ |
194 |
void *left, *right; |
195 |
|
196 |
if(check_args(env, unknown, unknown, empty)) |
197 |
return printerr(env); |
198 |
|
199 |
left= CAR(env->head)->content.ptr; |
200 |
right= CAR(CDR(env->head))->content.ptr; |
201 |
toss(env); toss(env); |
202 |
|
203 |
push_int(env, left==right); |
204 |
} |
205 |
|
206 |
/* Negates the top element on the stack. */ |
207 |
extern void not(environment *env) |
208 |
{ |
209 |
int val; |
210 |
|
211 |
if(check_args(env, integer, empty)) |
212 |
return printerr(env); |
213 |
|
214 |
val= CAR(env->head)->content.i; |
215 |
toss(env); |
216 |
push_int(env, !val); |
217 |
} |
218 |
|
219 |
/* Compares the two top elements on the stack and return 0 if they're the |
220 |
same. */ |
221 |
extern void neq(environment *env) |
222 |
{ |
223 |
eq(env); |
224 |
not(env); |
225 |
} |
226 |
|
227 |
extern void def(environment *env) |
228 |
{ |
229 |
symbol *sym; |
230 |
|
231 |
/* Needs two values on the stack, the top one must be a symbol */ |
232 |
if(check_args(env, symb, unknown, empty)) |
233 |
return printerr(env); |
234 |
|
235 |
/* long names are a pain */ |
236 |
sym= CAR(env->head)->content.sym; |
237 |
|
238 |
/* Bind the symbol to the value */ |
239 |
sym->val= CAR(CDR(env->head)); |
240 |
|
241 |
toss(env); toss(env); |
242 |
} |
243 |
|
244 |
/* Clear stack */ |
245 |
extern void clear(environment *env) |
246 |
{ |
247 |
env->head= new_val(env); |
248 |
} |
249 |
|
250 |
/* Forgets a symbol (remove it from the hash table) */ |
251 |
extern void forget(environment *env) |
252 |
{ |
253 |
char* sym_id; |
254 |
|
255 |
if(check_args(env, symb, empty)) |
256 |
return printerr(env); |
257 |
|
258 |
sym_id= CAR(env->head)->content.sym->id; |
259 |
toss(env); |
260 |
|
261 |
return forget_sym(hash(env->symbols, sym_id)); |
262 |
} |
263 |
|
264 |
/* Returns the current error number to the stack */ |
265 |
extern void errn(environment *env) |
266 |
{ |
267 |
push_int(env, env->err); |
268 |
} |
269 |
|
270 |
/* "+" */ |
271 |
extern void sx_2b(environment *env) |
272 |
{ |
273 |
int a, b; |
274 |
float fa, fb; |
275 |
size_t len; |
276 |
char* new_string; |
277 |
value *a_val, *b_val; |
278 |
|
279 |
if(check_args(env, unknown, unknown, empty)) |
280 |
return printerr(env); |
281 |
|
282 |
if(check_args(env, string, string, empty)==0) { |
283 |
a_val= CAR(env->head); |
284 |
b_val= CAR(CDR(env->head)); |
285 |
protect(a_val); protect(b_val); |
286 |
toss(env); if(env->err) return; |
287 |
toss(env); if(env->err) return; |
288 |
len= strlen(a_val->content.string)+strlen(b_val->content.string)+1; |
289 |
new_string= malloc(len); |
290 |
assert(new_string != NULL); |
291 |
strcpy(new_string, b_val->content.string); |
292 |
strcat(new_string, a_val->content.string); |
293 |
push_cstring(env, new_string); |
294 |
unprotect(a_val); unprotect(b_val); |
295 |
free(new_string); |
296 |
|
297 |
return; |
298 |
} |
299 |
|
300 |
if(check_args(env, integer, integer, empty)==0) { |
301 |
a= CAR(env->head)->content.i; |
302 |
toss(env); if(env->err) return; |
303 |
b= CAR(env->head)->content.i; |
304 |
toss(env); if(env->err) return; |
305 |
push_int(env, b+a); |
306 |
|
307 |
return; |
308 |
} |
309 |
|
310 |
if(check_args(env, tfloat, tfloat, empty)==0) { |
311 |
fa= CAR(env->head)->content.f; |
312 |
toss(env); if(env->err) return; |
313 |
fb= CAR(env->head)->content.f; |
314 |
toss(env); if(env->err) return; |
315 |
push_float(env, fb+fa); |
316 |
|
317 |
return; |
318 |
} |
319 |
|
320 |
if(check_args(env, tfloat, integer, empty)==0) { |
321 |
fa= CAR(env->head)->content.f; |
322 |
toss(env); if(env->err) return; |
323 |
b= CAR(env->head)->content.i; |
324 |
toss(env); if(env->err) return; |
325 |
push_float(env, b+fa); |
326 |
|
327 |
return; |
328 |
} |
329 |
|
330 |
if(check_args(env, integer, tfloat, empty)==0) { |
331 |
a= CAR(env->head)->content.i; |
332 |
toss(env); if(env->err) return; |
333 |
fb= CAR(env->head)->content.f; |
334 |
toss(env); if(env->err) return; |
335 |
push_float(env, fb+a); |
336 |
|
337 |
return; |
338 |
} |
339 |
|
340 |
return printerr(env); |
341 |
} |
342 |
|
343 |
/* "-" */ |
344 |
extern void sx_2d(environment *env) |
345 |
{ |
346 |
int a, b; |
347 |
float fa, fb; |
348 |
|
349 |
if(check_args(env, unknown, unknown, empty)) |
350 |
return printerr(env); |
351 |
|
352 |
if(check_args(env, integer, integer, empty)==0) { |
353 |
a= CAR(env->head)->content.i; |
354 |
toss(env); if(env->err) return; |
355 |
b= CAR(env->head)->content.i; |
356 |
toss(env); if(env->err) return; |
357 |
push_int(env, b-a); |
358 |
|
359 |
return; |
360 |
} |
361 |
|
362 |
if(check_args(env, tfloat, tfloat, empty)==0) { |
363 |
fa= CAR(env->head)->content.f; |
364 |
toss(env); if(env->err) return; |
365 |
fb= CAR(env->head)->content.f; |
366 |
toss(env); if(env->err) return; |
367 |
push_float(env, fb-fa); |
368 |
|
369 |
return; |
370 |
} |
371 |
|
372 |
if(check_args(env, tfloat, integer, empty)==0) { |
373 |
fa= CAR(env->head)->content.f; |
374 |
toss(env); if(env->err) return; |
375 |
b= CAR(env->head)->content.i; |
376 |
toss(env); if(env->err) return; |
377 |
push_float(env, b-fa); |
378 |
|
379 |
return; |
380 |
} |
381 |
|
382 |
if(check_args(env, integer, tfloat, empty)==0) { |
383 |
a= CAR(env->head)->content.i; |
384 |
toss(env); if(env->err) return; |
385 |
fb= CAR(env->head)->content.f; |
386 |
toss(env); if(env->err) return; |
387 |
push_float(env, fb-a); |
388 |
|
389 |
return; |
390 |
} |
391 |
|
392 |
return printerr(env); |
393 |
} |
394 |
|
395 |
/* ">" */ |
396 |
extern void sx_3e(environment *env) |
397 |
{ |
398 |
int a, b; |
399 |
float fa, fb; |
400 |
|
401 |
if(check_args(env, unknown, unknown, empty)) |
402 |
return printerr(env); |
403 |
|
404 |
if(check_args(env, integer, integer, empty)==0) { |
405 |
a= CAR(env->head)->content.i; |
406 |
toss(env); if(env->err) return; |
407 |
b= CAR(env->head)->content.i; |
408 |
toss(env); if(env->err) return; |
409 |
push_int(env, b>a); |
410 |
|
411 |
return; |
412 |
} |
413 |
|
414 |
if(check_args(env, tfloat, tfloat, empty)==0) { |
415 |
fa= CAR(env->head)->content.f; |
416 |
toss(env); if(env->err) return; |
417 |
fb= CAR(env->head)->content.f; |
418 |
toss(env); if(env->err) return; |
419 |
push_int(env, fb>fa); |
420 |
|
421 |
return; |
422 |
} |
423 |
|
424 |
if(check_args(env, tfloat, integer, empty)==0) { |
425 |
fa= CAR(env->head)->content.f; |
426 |
toss(env); if(env->err) return; |
427 |
b= CAR(env->head)->content.i; |
428 |
toss(env); if(env->err) return; |
429 |
push_int(env, b>fa); |
430 |
|
431 |
return; |
432 |
} |
433 |
|
434 |
if(check_args(env, integer, tfloat, empty)==0) { |
435 |
a= CAR(env->head)->content.i; |
436 |
toss(env); if(env->err) return; |
437 |
fb= CAR(env->head)->content.f; |
438 |
toss(env); if(env->err) return; |
439 |
push_int(env, fb>a); |
440 |
|
441 |
return; |
442 |
} |
443 |
|
444 |
return printerr(env); |
445 |
} |
446 |
|
447 |
/* "<" */ |
448 |
extern void sx_3c(environment *env) |
449 |
{ |
450 |
swap(env); if(env->err) return; |
451 |
sx_3e(env); |
452 |
} |
453 |
|
454 |
/* "<=" */ |
455 |
extern void sx_3c3d(environment *env) |
456 |
{ |
457 |
sx_3e(env); if(env->err) return; |
458 |
not(env); |
459 |
} |
460 |
|
461 |
/* ">=" */ |
462 |
extern void sx_3e3d(environment *env) |
463 |
{ |
464 |
sx_3c(env); if(env->err) return; |
465 |
not(env); |
466 |
} |
467 |
|
468 |
/* "dup"; duplicates an item on the stack */ |
469 |
extern void sx_647570(environment *env) |
470 |
{ |
471 |
if(check_args(env, unknown, empty)) |
472 |
return printerr(env); |
473 |
|
474 |
push_val(env, copy_val(env, CAR(env->head))); |
475 |
} |
476 |
|
477 |
/* "if", If-Then */ |
478 |
extern void sx_6966(environment *env) |
479 |
{ |
480 |
int truth; |
481 |
|
482 |
if(check_args(env, unknown, integer, empty)) |
483 |
return printerr(env); |
484 |
|
485 |
swap(env); |
486 |
if(env->err) return; |
487 |
|
488 |
truth= CAR(env->head)->content.i; |
489 |
|
490 |
toss(env); |
491 |
if(env->err) return; |
492 |
|
493 |
if(truth) |
494 |
eval(env); |
495 |
else |
496 |
toss(env); |
497 |
} |
498 |
|
499 |
/* If-Then-Else */ |
500 |
extern void ifelse(environment *env) |
501 |
{ |
502 |
int truth; |
503 |
|
504 |
if(check_args(env, unknown, unknown, integer, empty)) |
505 |
return printerr(env); |
506 |
|
507 |
rot(env); |
508 |
if(env->err) return; |
509 |
|
510 |
truth= CAR(env->head)->content.i; |
511 |
|
512 |
toss(env); |
513 |
if(env->err) return; |
514 |
|
515 |
if(!truth) |
516 |
swap(env); |
517 |
if(env->err) return; |
518 |
|
519 |
toss(env); |
520 |
if(env->err) return; |
521 |
|
522 |
eval(env); |
523 |
} |
524 |
|
525 |
/* "else" */ |
526 |
extern void sx_656c7365(environment *env) |
527 |
{ |
528 |
|
529 |
if(check_args(env, unknown, symb, unknown, symb, integer, empty)) |
530 |
return printerr(env); |
531 |
|
532 |
/// XXX |
533 |
|
534 |
if(CAR(CDR(env->head))->type!=symb |
535 |
|| strcmp(CAR(CDR(env->head))->content.sym->id, "then")!=0 |
536 |
|| CAR(CDR(CDR(CDR(env->head))))->type!=symb |
537 |
|| strcmp(CAR(CDR(CDR(CDR(env->head))))->content.sym->id, "if")!=0) { |
538 |
env->err= 2; |
539 |
return printerr(env); |
540 |
} |
541 |
|
542 |
swap(env); toss(env); rot(env); toss(env); |
543 |
ifelse(env); |
544 |
} |
545 |
|
546 |
extern void then(environment *env) |
547 |
{ |
548 |
|
549 |
if(check_args(env, unknown, symb, integer, empty)) |
550 |
return printerr(env); |
551 |
|
552 |
/// XXX |
553 |
|
554 |
if(CAR(CDR(env->head))->type!=symb |
555 |
|| strcmp(CAR(CDR(env->head))->content.sym->id, "if")!=0) { |
556 |
env->err= 2; |
557 |
return printerr(env); |
558 |
} |
559 |
|
560 |
swap(env); toss(env); |
561 |
sx_6966(env); |
562 |
} |
563 |
|
564 |
/* "while" */ |
565 |
extern void sx_7768696c65(environment *env) |
566 |
{ |
567 |
int truth; |
568 |
value *loop, *test; |
569 |
|
570 |
if(check_args(env, unknown, integer, empty)) |
571 |
return printerr(env); |
572 |
|
573 |
loop= CAR(env->head); |
574 |
protect(loop); |
575 |
toss(env); if(env->err) return; |
576 |
|
577 |
test= CAR(env->head); |
578 |
protect(test); |
579 |
toss(env); if(env->err) return; |
580 |
|
581 |
do { |
582 |
push_val(env, test); |
583 |
eval(env); |
584 |
|
585 |
/// XXX |
586 |
|
587 |
if(CAR(env->head)->type != integer) { |
588 |
env->err= 2; |
589 |
return printerr(env); |
590 |
} |
591 |
|
592 |
truth= CAR(env->head)->content.i; |
593 |
toss(env); if(env->err) return; |
594 |
|
595 |
if(truth) { |
596 |
push_val(env, loop); |
597 |
eval(env); |
598 |
} else { |
599 |
toss(env); |
600 |
} |
601 |
|
602 |
} while(truth); |
603 |
|
604 |
unprotect(loop); unprotect(test); |
605 |
} |
606 |
|
607 |
|
608 |
/* "for"; for-loop */ |
609 |
extern void sx_666f72(environment *env) |
610 |
{ |
611 |
value *loop; |
612 |
int foo1, foo2; |
613 |
|
614 |
if(check_args(env, unknown, integer, integer, empty)) |
615 |
return printerr(env); |
616 |
|
617 |
loop= CAR(env->head); |
618 |
protect(loop); |
619 |
toss(env); if(env->err) return; |
620 |
|
621 |
foo2= CAR(env->head)->content.i; |
622 |
toss(env); if(env->err) return; |
623 |
|
624 |
foo1= CAR(env->head)->content.i; |
625 |
toss(env); if(env->err) return; |
626 |
|
627 |
if(foo1<=foo2) { |
628 |
while(foo1<=foo2) { |
629 |
push_int(env, foo1); |
630 |
push_val(env, loop); |
631 |
eval(env); if(env->err) return; |
632 |
foo1++; |
633 |
} |
634 |
} else { |
635 |
while(foo1>=foo2) { |
636 |
push_int(env, foo1); |
637 |
push_val(env, loop); |
638 |
eval(env); if(env->err) return; |
639 |
foo1--; |
640 |
} |
641 |
} |
642 |
unprotect(loop); |
643 |
} |
644 |
|
645 |
/* Variant of for-loop |
646 |
Requires a list as first argument */ |
647 |
extern void foreach(environment *env) |
648 |
{ |
649 |
value *loop, *foo; |
650 |
value *iterator; |
651 |
|
652 |
if(check_args(env, unknown, tcons, empty)) |
653 |
return printerr(env); |
654 |
|
655 |
loop= CAR(env->head); |
656 |
protect(loop); |
657 |
toss(env); if(env->err) return; |
658 |
|
659 |
foo= CAR(env->head); |
660 |
protect(foo); |
661 |
toss(env); if(env->err) return; |
662 |
|
663 |
iterator= foo; |
664 |
|
665 |
while(iterator->type!=empty) { |
666 |
push_val(env, CAR(iterator)); |
667 |
push_val(env, loop); |
668 |
eval(env); if(env->err) return; |
669 |
|
670 |
/// XXX |
671 |
if (iterator->type == tcons){ |
672 |
iterator= CDR(iterator); |
673 |
} else { |
674 |
env->err= 2; /* Improper list */ |
675 |
break; |
676 |
} |
677 |
} |
678 |
unprotect(loop); unprotect(foo); |
679 |
|
680 |
return printerr(env); |
681 |
} |
682 |
|
683 |
/* "to" */ |
684 |
extern void to(environment *env) |
685 |
{ |
686 |
int ending, start, i; |
687 |
value *iterator, *temp, *end; |
688 |
|
689 |
if(check_args(env, integer, integer, empty)) |
690 |
return printerr(env); |
691 |
|
692 |
end= new_val(env); |
693 |
|
694 |
ending= CAR(env->head)->content.i; |
695 |
toss(env); if(env->err) return; |
696 |
start= CAR(env->head)->content.i; |
697 |
toss(env); if(env->err) return; |
698 |
|
699 |
push_sym(env, "["); |
700 |
|
701 |
if(ending>=start) { |
702 |
for(i= ending; i>=start; i--) |
703 |
push_int(env, i); |
704 |
} else { |
705 |
for(i= ending; i<=start; i++) |
706 |
push_int(env, i); |
707 |
} |
708 |
|
709 |
iterator= env->head; |
710 |
|
711 |
if(iterator->type==empty |
712 |
|| (CAR(iterator)->type==symb |
713 |
&& CAR(iterator)->content.sym->id[0]=='[')) { |
714 |
temp= end; |
715 |
toss(env); |
716 |
} else { |
717 |
/* Search for first delimiter */ |
718 |
while(CDR(iterator)->type!=empty |
719 |
&& (CAR(CDR(iterator))->type!=symb |
720 |
|| CAR(CDR(iterator))->content.sym->id[0]!='[')) |
721 |
iterator= CDR(iterator); |
722 |
|
723 |
/* Extract list */ |
724 |
temp= env->head; |
725 |
env->head= CDR(iterator); |
726 |
CDR(iterator)= end; |
727 |
|
728 |
if(env->head->type!=empty) |
729 |
toss(env); |
730 |
} |
731 |
|
732 |
/* Push list */ |
733 |
push_val(env, temp); |
734 |
} |
735 |
|
736 |
/* Read a string */ |
737 |
extern void readline(environment *env) |
738 |
{ |
739 |
readlinestream(env, env->inputstream); |
740 |
} |
741 |
|
742 |
/* Read a string from a port */ |
743 |
extern void readlineport(environment *env) |
744 |
{ |
745 |
FILE *stream; |
746 |
|
747 |
if(check_args(env, port, empty)) |
748 |
return printerr(env); |
749 |
|
750 |
stream=CAR(env->head)->content.p; |
751 |
readlinestream(env, stream); if(env->err) return; |
752 |
|
753 |
swap(env); if(env->err) return; |
754 |
toss(env); |
755 |
} |
756 |
|
757 |
/* "read"; Read a value and place on stack */ |
758 |
extern void sx_72656164(environment *env) |
759 |
{ |
760 |
readstream(env, env->inputstream); |
761 |
} |
762 |
|
763 |
/* "readport"; Read a value from a port and place on stack */ |
764 |
extern void readport(environment *env) |
765 |
{ |
766 |
FILE *stream; |
767 |
|
768 |
if(check_args(env, port, empty)) |
769 |
return printerr(env); |
770 |
|
771 |
stream=CAR(env->head)->content.p; |
772 |
readstream(env, stream); if(env->err) return; |
773 |
|
774 |
swap(env); if(env->err) return; |
775 |
toss(env); |
776 |
} |
777 |
|
778 |
#ifdef __linux__ |
779 |
extern void beep(environment *env) |
780 |
{ |
781 |
int freq, dur, period, ticks; |
782 |
|
783 |
if(check_args(env, integer, integer, empty)) |
784 |
return printerr(env); |
785 |
|
786 |
dur= CAR(env->head)->content.i; |
787 |
toss(env); |
788 |
freq= CAR(env->head)->content.i; |
789 |
toss(env); |
790 |
|
791 |
period= 1193180/freq; /* convert freq from Hz to period |
792 |
length */ |
793 |
ticks= dur*.001193180; /* convert duration from µseconds to |
794 |
timer ticks */ |
795 |
|
796 |
/* ticks=dur/1000; */ |
797 |
|
798 |
/* if (ioctl(STDOUT_FILENO, KDMKTONE, (125<<16) + 0x637)==0) */ |
799 |
switch (ioctl(STDOUT_FILENO, KDMKTONE, (ticks<<16) | period)){ |
800 |
case 0: |
801 |
usleep(dur); |
802 |
return; |
803 |
case -1: |
804 |
perror("beep"); |
805 |
env->err= 5; |
806 |
return; |
807 |
default: |
808 |
abort(); |
809 |
} |
810 |
} |
811 |
#endif /* __linux__ */ |
812 |
|
813 |
/* "wait" */ |
814 |
extern void sx_77616974(environment *env) |
815 |
{ |
816 |
int dur; |
817 |
|
818 |
if(check_args(env, integer, empty)) |
819 |
return printerr(env); |
820 |
|
821 |
dur= CAR(env->head)->content.i; |
822 |
toss(env); |
823 |
|
824 |
usleep(dur); |
825 |
} |
826 |
|
827 |
|
828 |
/* "*" */ |
829 |
extern void sx_2a(environment *env) |
830 |
{ |
831 |
int a, b; |
832 |
float fa, fb; |
833 |
|
834 |
if(check_args(env, unknown, unknown, empty)) |
835 |
return printerr(env); |
836 |
|
837 |
if(check_args(env, integer, integer, empty)==0) { |
838 |
a= CAR(env->head)->content.i; |
839 |
toss(env); if(env->err) return; |
840 |
b= CAR(env->head)->content.i; |
841 |
toss(env); if(env->err) return; |
842 |
push_int(env, b*a); |
843 |
|
844 |
return; |
845 |
} |
846 |
|
847 |
if(check_args(env, tfloat, tfloat, empty)==0) { |
848 |
fa= CAR(env->head)->content.f; |
849 |
toss(env); if(env->err) return; |
850 |
fb= CAR(env->head)->content.f; |
851 |
toss(env); if(env->err) return; |
852 |
push_float(env, fb*fa); |
853 |
|
854 |
return; |
855 |
} |
856 |
|
857 |
if(check_args(env, tfloat, integer, empty)==0) { |
858 |
fa= CAR(env->head)->content.f; |
859 |
toss(env); if(env->err) return; |
860 |
b= CAR(env->head)->content.i; |
861 |
toss(env); if(env->err) return; |
862 |
push_float(env, b*fa); |
863 |
|
864 |
return; |
865 |
} |
866 |
|
867 |
if(check_args(env, integer, tfloat, empty)==0) { |
868 |
a= CAR(env->head)->content.i; |
869 |
toss(env); if(env->err) return; |
870 |
fb= CAR(env->head)->content.f; |
871 |
toss(env); if(env->err) return; |
872 |
push_float(env, fb*a); |
873 |
|
874 |
return; |
875 |
} |
876 |
|
877 |
return printerr(env); |
878 |
} |
879 |
|
880 |
/* "/" */ |
881 |
extern void sx_2f(environment *env) |
882 |
{ |
883 |
int a, b; |
884 |
float fa, fb; |
885 |
|
886 |
if(check_args(env, unknown, unknown, empty)) |
887 |
return printerr(env); |
888 |
|
889 |
if(check_args(env, integer, integer, empty)==0) { |
890 |
a= CAR(env->head)->content.i; |
891 |
toss(env); if(env->err) return; |
892 |
b= CAR(env->head)->content.i; |
893 |
toss(env); if(env->err) return; |
894 |
push_float(env, b/a); |
895 |
|
896 |
return; |
897 |
} |
898 |
|
899 |
if(check_args(env, tfloat, tfloat, empty)==0) { |
900 |
fa= CAR(env->head)->content.f; |
901 |
toss(env); if(env->err) return; |
902 |
fb= CAR(env->head)->content.f; |
903 |
toss(env); if(env->err) return; |
904 |
push_float(env, fb/fa); |
905 |
|
906 |
return; |
907 |
} |
908 |
|
909 |
if(check_args(env, tfloat, integer, empty)==0) { |
910 |
fa= CAR(env->head)->content.f; |
911 |
toss(env); if(env->err) return; |
912 |
b= CAR(env->head)->content.i; |
913 |
toss(env); if(env->err) return; |
914 |
push_float(env, b/fa); |
915 |
|
916 |
return; |
917 |
} |
918 |
|
919 |
if(check_args(env, integer, tfloat, empty)==0) { |
920 |
a= CAR(env->head)->content.i; |
921 |
toss(env); if(env->err) return; |
922 |
fb= CAR(env->head)->content.f; |
923 |
toss(env); if(env->err) return; |
924 |
push_float(env, fb/a); |
925 |
|
926 |
return; |
927 |
} |
928 |
|
929 |
return printerr(env); |
930 |
} |
931 |
|
932 |
/* "mod" */ |
933 |
extern void mod(environment *env) |
934 |
{ |
935 |
int a, b; |
936 |
|
937 |
if(check_args(env, unknown, unknown, empty)) |
938 |
return printerr(env); |
939 |
|
940 |
if(check_args(env, integer, integer, empty)==0) { |
941 |
a= CAR(env->head)->content.i; |
942 |
toss(env); if(env->err) return; |
943 |
b= CAR(env->head)->content.i; |
944 |
toss(env); if(env->err) return; |
945 |
push_int(env, b%a); |
946 |
|
947 |
return; |
948 |
} |
949 |
|
950 |
return printerr(env); |
951 |
} |
952 |
|
953 |
|
954 |
/* "div" */ |
955 |
extern void sx_646976(environment *env) |
956 |
{ |
957 |
int a, b; |
958 |
|
959 |
if(check_args(env, integer, integer, empty)) |
960 |
return printerr(env); |
961 |
|
962 |
a= CAR(env->head)->content.i; |
963 |
toss(env); if(env->err) return; |
964 |
b= CAR(env->head)->content.i; |
965 |
toss(env); if(env->err) return; |
966 |
push_int(env, (int)b/a); |
967 |
} |
968 |
|
969 |
|
970 |
extern void setcar(environment *env) |
971 |
{ |
972 |
|
973 |
if(check_args(env, tcons, unknown, empty)) |
974 |
return printerr(env); |
975 |
|
976 |
CAR(CAR(CDR(env->head)))=CAR(env->head); |
977 |
toss(env); |
978 |
} |
979 |
|
980 |
extern void setcdr(environment *env) |
981 |
{ |
982 |
|
983 |
if(check_args(env, tcons, unknown, empty)) |
984 |
return printerr(env); |
985 |
|
986 |
CDR(CAR(CDR(env->head)))=CAR(env->head); |
987 |
toss(env); |
988 |
} |
989 |
|
990 |
extern void car(environment *env) |
991 |
{ |
992 |
|
993 |
if(check_args(env, tcons, empty)) |
994 |
return printerr(env); |
995 |
|
996 |
CAR(env->head)=CAR(CAR(env->head)); |
997 |
} |
998 |
|
999 |
extern void cdr(environment *env) |
1000 |
{ |
1001 |
|
1002 |
if(check_args(env, tcons, empty)) |
1003 |
return printerr(env); |
1004 |
|
1005 |
CAR(env->head)=CDR(CAR(env->head)); |
1006 |
} |
1007 |
|
1008 |
extern void cons(environment *env) |
1009 |
{ |
1010 |
value *val; |
1011 |
|
1012 |
if(check_args(env, unknown, unknown, empty)) |
1013 |
return printerr(env); |
1014 |
|
1015 |
val=new_val(env); |
1016 |
val->content.c= malloc(sizeof(pair)); |
1017 |
assert(val->content.c!=NULL); |
1018 |
|
1019 |
env->gc_count += sizeof(pair); |
1020 |
val->type=tcons; |
1021 |
|
1022 |
CAR(val)= CAR(CDR(env->head)); |
1023 |
CDR(val)= CAR(env->head); |
1024 |
|
1025 |
push_val(env, val); |
1026 |
|
1027 |
swap(env); if(env->err) return; |
1028 |
toss(env); if(env->err) return; |
1029 |
swap(env); if(env->err) return; |
1030 |
toss(env); |
1031 |
} |
1032 |
|
1033 |
|
1034 |
/* General assoc function */ |
1035 |
void assocgen(environment *env, funcp eqfunc) |
1036 |
{ |
1037 |
value *key, *item; |
1038 |
|
1039 |
/* Needs two values on the stack, the top one must be an association |
1040 |
list */ |
1041 |
if(check_args(env, tcons, unknown, empty)) |
1042 |
return printerr(env); |
1043 |
|
1044 |
key=CAR(CDR(env->head)); |
1045 |
item=CAR(env->head); |
1046 |
|
1047 |
while(item->type == tcons){ |
1048 |
if(CAR(item)->type != tcons){ |
1049 |
env->err= 2; |
1050 |
return printerr(env); |
1051 |
} |
1052 |
|
1053 |
push_val(env, key); |
1054 |
push_val(env, CAR(CAR(item))); |
1055 |
eqfunc((void*)env); if(env->err) return; |
1056 |
|
1057 |
/* Check the result of 'eqfunc' */ |
1058 |
if(check_args(env, integer, empty)) |
1059 |
return printerr(env); |
1060 |
|
1061 |
if(CAR(env->head)->content.i){ |
1062 |
toss(env); if(env->err) return; |
1063 |
break; |
1064 |
} |
1065 |
toss(env); if(env->err) return; |
1066 |
|
1067 |
if(item->type!=tcons) { |
1068 |
env->err= 2; |
1069 |
return printerr(env); |
1070 |
} |
1071 |
|
1072 |
item=CDR(item); |
1073 |
} |
1074 |
|
1075 |
if(item->type == tcons){ /* A match was found */ |
1076 |
push_val(env, CAR(item)); |
1077 |
} else { |
1078 |
push_int(env, 0); |
1079 |
} |
1080 |
swap(env); if(env->err) return; |
1081 |
toss(env); if(env->err) return; |
1082 |
swap(env); if(env->err) return; |
1083 |
toss(env); |
1084 |
} |
1085 |
|
1086 |
|
1087 |
/* 2: 3 => */ |
1088 |
/* 1: [ [ 1 . 2 ] [ 3 . 4 ] ] => 1: [ 3 . 4 ] */ |
1089 |
extern void assq(environment *env) |
1090 |
{ |
1091 |
assocgen(env, (void*)eq); |
1092 |
} |
1093 |
|
1094 |
|
1095 |
/* "do" */ |
1096 |
extern void sx_646f(environment *env) |
1097 |
{ |
1098 |
swap(env); if(env->err) return; |
1099 |
eval(env); |
1100 |
} |
1101 |
|
1102 |
/* "open" */ |
1103 |
/* 2: "file" */ |
1104 |
/* 1: "r" => 1: #<port 0x47114711> */ |
1105 |
extern void sx_6f70656e(environment *env) |
1106 |
{ |
1107 |
value *new_port; |
1108 |
FILE *stream; |
1109 |
|
1110 |
if(check_args(env, string, string, empty)) |
1111 |
return printerr(env); |
1112 |
|
1113 |
stream=fopen(CAR(CDR(env->head))->content.ptr, |
1114 |
CAR(env->head)->content.ptr); |
1115 |
|
1116 |
if(stream == NULL) { |
1117 |
perror("open"); |
1118 |
env->err= 5; |
1119 |
return; |
1120 |
} |
1121 |
|
1122 |
new_port=new_val(env); |
1123 |
new_port->type=port; |
1124 |
new_port->content.p=stream; |
1125 |
|
1126 |
push_val(env, new_port); |
1127 |
|
1128 |
swap(env); if(env->err) return; |
1129 |
toss(env); if(env->err) return; |
1130 |
swap(env); if(env->err) return; |
1131 |
toss(env); |
1132 |
} |
1133 |
|
1134 |
|
1135 |
/* "close" */ |
1136 |
extern void sx_636c6f7365(environment *env) |
1137 |
{ |
1138 |
int ret; |
1139 |
|
1140 |
if(check_args(env, port, empty)) |
1141 |
return printerr(env); |
1142 |
|
1143 |
ret= fclose(CAR(env->head)->content.p); |
1144 |
|
1145 |
if(ret != 0){ |
1146 |
perror("close"); |
1147 |
env->err= 5; |
1148 |
return; |
1149 |
} |
1150 |
|
1151 |
toss(env); |
1152 |
} |
1153 |
|
1154 |
|
1155 |
extern void mangle(environment *env) |
1156 |
{ |
1157 |
char *new_string; |
1158 |
|
1159 |
if(check_args(env, string, empty)) |
1160 |
return printerr(env); |
1161 |
|
1162 |
new_string= mangle_str(CAR(env->head)->content.string); |
1163 |
|
1164 |
toss(env); |
1165 |
if(env->err) return; |
1166 |
|
1167 |
push_cstring(env, new_string); |
1168 |
} |
1169 |
|
1170 |
/* "fork" */ |
1171 |
extern void sx_666f726b(environment *env) |
1172 |
{ |
1173 |
push_int(env, fork()); |
1174 |
} |
1175 |
|
1176 |
/* "waitpid" */ |
1177 |
extern void sx_77616974706964(environment *env) |
1178 |
{ |
1179 |
|
1180 |
if(check_args(env, integer, empty)) |
1181 |
return printerr(env); |
1182 |
|
1183 |
push_int(env, waitpid(CAR(env->head)->content.i, NULL, 0)); |
1184 |
swap(env); toss(env); |
1185 |
} |
1186 |
|
1187 |
|
1188 |
/* Discard the top element of the stack. */ |
1189 |
extern void toss(environment *env) |
1190 |
{ |
1191 |
|
1192 |
if(check_args(env, unknown, empty)) |
1193 |
return printerr(env); |
1194 |
|
1195 |
env->head= CDR(env->head); /* Remove the top stack item */ |
1196 |
} |
1197 |
|
1198 |
|
1199 |
/* Quit stack. */ |
1200 |
extern void quit(environment *env) |
1201 |
{ |
1202 |
int i; |
1203 |
|
1204 |
env->head= new_val(env); |
1205 |
|
1206 |
if (env->err) return; |
1207 |
for(i= 0; i<HASHTBLSIZE; i++) { |
1208 |
while(env->symbols[i]!= NULL) { |
1209 |
forget_sym(&(env->symbols[i])); |
1210 |
} |
1211 |
env->symbols[i]= NULL; |
1212 |
} |
1213 |
|
1214 |
env->gc_limit= 0; |
1215 |
gc_maybe(env); |
1216 |
|
1217 |
words(env); |
1218 |
|
1219 |
if(env->free_string!=NULL) |
1220 |
free(env->free_string); |
1221 |
|
1222 |
#ifdef __linux__ |
1223 |
muntrace(); |
1224 |
#endif |
1225 |
|
1226 |
exit(EXIT_SUCCESS); |
1227 |
} |
1228 |
|
1229 |
|
1230 |
/* List all defined words */ |
1231 |
extern void words(environment *env) |
1232 |
{ |
1233 |
symbol *temp; |
1234 |
int i; |
1235 |
|
1236 |
for(i= 0; i<HASHTBLSIZE; i++) { |
1237 |
temp= env->symbols[i]; |
1238 |
while(temp!=NULL) { |
1239 |
#ifdef DEBUG |
1240 |
if (temp->val != NULL && temp->val->gc.flag.protect) |
1241 |
printf("(protected) "); |
1242 |
#endif /* DEBUG */ |
1243 |
printf("%s ", temp->id); |
1244 |
temp= temp->next; |
1245 |
} |
1246 |
} |
1247 |
} |
1248 |
|
1249 |
|
1250 |
/* Only to be called by itself function printstack. */ |
1251 |
void print_st(environment *env, value *stack_head, long counter) |
1252 |
{ |
1253 |
if(CDR(stack_head)->type != empty) |
1254 |
print_st(env, CDR(stack_head), counter+1); |
1255 |
printf("%ld: ", counter); |
1256 |
print_val(env, CAR(stack_head), 0, NULL, stdout); |
1257 |
printf("\n"); |
1258 |
} |
1259 |
|
1260 |
|
1261 |
/* Prints the stack. */ |
1262 |
extern void printstack(environment *env) |
1263 |
{ |
1264 |
if(env->head->type == empty) { |
1265 |
printf("Stack Empty\n"); |
1266 |
return; |
1267 |
} |
1268 |
|
1269 |
print_st(env, env->head, 1); |
1270 |
} |
1271 |
|
1272 |
|
1273 |
extern void copying(environment *env) |
1274 |
{ |
1275 |
puts(license_message); |
1276 |
} |
1277 |
|
1278 |
|
1279 |
extern void warranty(environment *env) |
1280 |
{ |
1281 |
puts(warranty_message); |
1282 |
} |