1 |
#include "stack.h" |
2 |
|
3 |
/* Print newline. */ |
4 |
extern void nl(environment *env) |
5 |
{ |
6 |
printf("\n"); |
7 |
} |
8 |
|
9 |
/* Print a newline to a port */ |
10 |
extern void nlport(environment *env) |
11 |
{ |
12 |
if(env->head->type==empty) { |
13 |
printerr("Too Few Arguments"); |
14 |
env->err= 1; |
15 |
return; |
16 |
} |
17 |
|
18 |
if(CAR(env->head)->type!=port) { |
19 |
printerr("Bad Argument Type"); |
20 |
env->err= 2; |
21 |
return; |
22 |
} |
23 |
|
24 |
if(fprintf(CAR(env->head)->content.p, "\n") < 0){ |
25 |
perror("nl"); |
26 |
env->err= 5; |
27 |
return; |
28 |
} |
29 |
toss(env); |
30 |
} |
31 |
|
32 |
/* Gets the type of a value */ |
33 |
extern void type(environment *env) |
34 |
{ |
35 |
if(env->head->type==empty) { |
36 |
printerr("Too Few Arguments"); |
37 |
env->err= 1; |
38 |
return; |
39 |
} |
40 |
|
41 |
switch(CAR(env->head)->type){ |
42 |
case empty: |
43 |
push_sym(env, "empty"); |
44 |
break; |
45 |
case integer: |
46 |
push_sym(env, "integer"); |
47 |
break; |
48 |
case tfloat: |
49 |
push_sym(env, "float"); |
50 |
break; |
51 |
case string: |
52 |
push_sym(env, "string"); |
53 |
break; |
54 |
case symb: |
55 |
push_sym(env, "symbol"); |
56 |
break; |
57 |
case func: |
58 |
push_sym(env, "function"); |
59 |
break; |
60 |
case tcons: |
61 |
push_sym(env, "pair"); |
62 |
break; |
63 |
case port: |
64 |
push_sym(env, "port"); |
65 |
break; |
66 |
} |
67 |
swap(env); |
68 |
if (env->err) return; |
69 |
toss(env); |
70 |
} |
71 |
|
72 |
/* Print the top element of the stack but don't discard it */ |
73 |
extern void print_(environment *env) |
74 |
{ |
75 |
if(env->head->type==empty) { |
76 |
printerr("Too Few Arguments"); |
77 |
env->err= 1; |
78 |
return; |
79 |
} |
80 |
print_val(env, CAR(env->head), 0, NULL, stdout); |
81 |
if(env->err) return; |
82 |
nl(env); |
83 |
} |
84 |
|
85 |
/* Prints the top element of the stack */ |
86 |
extern void print(environment *env) |
87 |
{ |
88 |
print_(env); |
89 |
if(env->err) return; |
90 |
toss(env); |
91 |
} |
92 |
|
93 |
/* Print the top element of the stack without quotes, but don't |
94 |
discard it. */ |
95 |
extern void princ_(environment *env) |
96 |
{ |
97 |
if(env->head->type==empty) { |
98 |
printerr("Too Few Arguments"); |
99 |
env->err= 1; |
100 |
return; |
101 |
} |
102 |
print_val(env, CAR(env->head), 1, NULL, stdout); |
103 |
} |
104 |
|
105 |
/* Prints the top element of the stack without quotes. */ |
106 |
extern void princ(environment *env) |
107 |
{ |
108 |
princ_(env); |
109 |
if(env->err) return; |
110 |
toss(env); |
111 |
} |
112 |
|
113 |
/* Print a value to a port, but don't discard it */ |
114 |
extern void printport_(environment *env) |
115 |
{ |
116 |
if(env->head->type==empty || CDR(env->head)->type == empty) { |
117 |
printerr("Too Few Arguments"); |
118 |
env->err= 1; |
119 |
return; |
120 |
} |
121 |
|
122 |
if(CAR(env->head)->type!=port) { |
123 |
printerr("Bad Argument Type"); |
124 |
env->err= 2; |
125 |
return; |
126 |
} |
127 |
|
128 |
print_val(env, CAR(CDR(env->head)), 0, NULL, CAR(env->head)->content.p); |
129 |
if(env->err) return; |
130 |
nlport(env); |
131 |
} |
132 |
|
133 |
/* Print a value to a port */ |
134 |
extern void printport(environment *env) |
135 |
{ |
136 |
printport_(env); |
137 |
if(env->err) return; |
138 |
toss(env); |
139 |
} |
140 |
|
141 |
/* Print, without quotes, to a port, a value, but don't discard it. */ |
142 |
extern void princport_(environment *env) |
143 |
{ |
144 |
if(env->head->type==empty || CDR(env->head)->type == empty) { |
145 |
printerr("Too Few Arguments"); |
146 |
env->err= 1; |
147 |
return; |
148 |
} |
149 |
|
150 |
if(CAR(env->head)->type!=port) { |
151 |
printerr("Bad Argument Type"); |
152 |
env->err= 2; |
153 |
return; |
154 |
} |
155 |
|
156 |
print_val(env, CAR(CDR(env->head)), 1, NULL, CAR(env->head)->content.p); |
157 |
toss(env); if(env->err) return; |
158 |
} |
159 |
|
160 |
/* Print, without quotes, to a port, the top element. */ |
161 |
extern void princport(environment *env) |
162 |
{ |
163 |
princport_(env); |
164 |
if(env->err) return; |
165 |
toss(env); |
166 |
} |
167 |
|
168 |
/* Rotate the first three elements on the stack. */ |
169 |
extern void rot(environment *env) |
170 |
{ |
171 |
value *temp= env->head; |
172 |
|
173 |
if(env->head->type == empty || CDR(env->head)->type == empty |
174 |
|| CDR(CDR(env->head))->type == empty) { |
175 |
printerr("Too Few Arguments"); |
176 |
env->err= 1; |
177 |
return; |
178 |
} |
179 |
|
180 |
env->head= CDR(CDR(env->head)); |
181 |
CDR(CDR(temp))= CDR(env->head); |
182 |
CDR(env->head)= temp; |
183 |
} |
184 |
|
185 |
/* Relocate elements of the list on the stack. */ |
186 |
extern void expand(environment *env) |
187 |
{ |
188 |
value *temp, *new_head; |
189 |
|
190 |
/* Is top element a list? */ |
191 |
if(env->head->type==empty) { |
192 |
printerr("Too Few Arguments"); |
193 |
env->err= 1; |
194 |
return; |
195 |
} |
196 |
|
197 |
if(CAR(env->head)->type!=tcons) { |
198 |
printerr("Bad Argument Type"); |
199 |
env->err= 2; |
200 |
return; |
201 |
} |
202 |
|
203 |
rev(env); |
204 |
|
205 |
if(env->err) |
206 |
return; |
207 |
|
208 |
/* The first list element is the new stack head */ |
209 |
new_head= temp= CAR(env->head); |
210 |
|
211 |
toss(env); |
212 |
|
213 |
/* Find the end of the list */ |
214 |
while(CDR(temp)->type != empty) { |
215 |
if (CDR(temp)->type == tcons) |
216 |
temp= CDR(temp); |
217 |
else { |
218 |
printerr("Bad Argument Type"); /* Improper list */ |
219 |
env->err= 2; |
220 |
return; |
221 |
} |
222 |
} |
223 |
|
224 |
/* Connect the tail of the list with the old stack head */ |
225 |
CDR(temp)= env->head; |
226 |
env->head= new_head; /* ...and voila! */ |
227 |
|
228 |
} |
229 |
|
230 |
/* Compares two elements by reference. */ |
231 |
extern void eq(environment *env) |
232 |
{ |
233 |
void *left, *right; |
234 |
|
235 |
if(env->head->type==empty || CDR(env->head)->type==empty) { |
236 |
printerr("Too Few Arguments"); |
237 |
env->err= 1; |
238 |
return; |
239 |
} |
240 |
|
241 |
left= CAR(env->head)->content.ptr; |
242 |
right= CAR(CDR(env->head))->content.ptr; |
243 |
toss(env); toss(env); |
244 |
|
245 |
push_int(env, left==right); |
246 |
} |
247 |
|
248 |
/* Negates the top element on the stack. */ |
249 |
extern void not(environment *env) |
250 |
{ |
251 |
int val; |
252 |
|
253 |
if(env->head->type==empty) { |
254 |
printerr("Too Few Arguments"); |
255 |
env->err= 1; |
256 |
return; |
257 |
} |
258 |
|
259 |
if(CAR(env->head)->type!=integer) { |
260 |
printerr("Bad Argument Type"); |
261 |
env->err= 2; |
262 |
return; |
263 |
} |
264 |
|
265 |
val= CAR(env->head)->content.i; |
266 |
toss(env); |
267 |
push_int(env, !val); |
268 |
} |
269 |
|
270 |
/* Compares the two top elements on the stack and return 0 if they're the |
271 |
same. */ |
272 |
extern void neq(environment *env) |
273 |
{ |
274 |
eq(env); |
275 |
not(env); |
276 |
} |
277 |
|
278 |
extern void def(environment *env) |
279 |
{ |
280 |
symbol *sym; |
281 |
|
282 |
/* Needs two values on the stack, the top one must be a symbol */ |
283 |
if(env->head->type==empty || CDR(env->head)->type==empty) { |
284 |
printerr("Too Few Arguments"); |
285 |
env->err= 1; |
286 |
return; |
287 |
} |
288 |
|
289 |
if(CAR(env->head)->type!=symb) { |
290 |
printerr("Bad Argument Type"); |
291 |
env->err= 2; |
292 |
return; |
293 |
} |
294 |
|
295 |
/* long names are a pain */ |
296 |
sym= CAR(env->head)->content.sym; |
297 |
|
298 |
/* Bind the symbol to the value */ |
299 |
sym->val= CAR(CDR(env->head)); |
300 |
|
301 |
toss(env); toss(env); |
302 |
} |
303 |
|
304 |
/* Clear stack */ |
305 |
extern void clear(environment *env) |
306 |
{ |
307 |
while(env->head->type != empty) |
308 |
toss(env); |
309 |
} |
310 |
|
311 |
/* Forgets a symbol (remove it from the hash table) */ |
312 |
extern void forget(environment *env) |
313 |
{ |
314 |
char* sym_id; |
315 |
|
316 |
if(env->head->type==empty) { |
317 |
printerr("Too Few Arguments"); |
318 |
env->err= 1; |
319 |
return; |
320 |
} |
321 |
|
322 |
if(CAR(env->head)->type!=symb) { |
323 |
printerr("Bad Argument Type"); |
324 |
env->err= 2; |
325 |
return; |
326 |
} |
327 |
|
328 |
sym_id= CAR(env->head)->content.sym->id; |
329 |
toss(env); |
330 |
|
331 |
return forget_sym(hash(env->symbols, sym_id)); |
332 |
} |
333 |
|
334 |
/* Returns the current error number to the stack */ |
335 |
extern void errn(environment *env) |
336 |
{ |
337 |
push_int(env, env->err); |
338 |
} |
339 |
|
340 |
/* "+" */ |
341 |
extern void sx_2b(environment *env) |
342 |
{ |
343 |
int a, b; |
344 |
float fa, fb; |
345 |
size_t len; |
346 |
char* new_string; |
347 |
value *a_val, *b_val; |
348 |
|
349 |
if(env->head->type==empty || CDR(env->head)->type==empty) { |
350 |
printerr("Too Few Arguments"); |
351 |
env->err= 1; |
352 |
return; |
353 |
} |
354 |
|
355 |
if(CAR(env->head)->type==string |
356 |
&& CAR(CDR(env->head))->type==string) { |
357 |
a_val= CAR(env->head); |
358 |
b_val= CAR(CDR(env->head)); |
359 |
protect(a_val); protect(b_val); |
360 |
toss(env); if(env->err) return; |
361 |
toss(env); if(env->err) return; |
362 |
len= strlen(a_val->content.string)+strlen(b_val->content.string)+1; |
363 |
new_string= malloc(len); |
364 |
assert(new_string != NULL); |
365 |
strcpy(new_string, b_val->content.string); |
366 |
strcat(new_string, a_val->content.string); |
367 |
push_cstring(env, new_string); |
368 |
unprotect(a_val); unprotect(b_val); |
369 |
free(new_string); |
370 |
|
371 |
return; |
372 |
} |
373 |
|
374 |
if(CAR(env->head)->type==integer |
375 |
&& CAR(CDR(env->head))->type==integer) { |
376 |
a= CAR(env->head)->content.i; |
377 |
toss(env); if(env->err) return; |
378 |
b= CAR(env->head)->content.i; |
379 |
toss(env); if(env->err) return; |
380 |
push_int(env, b+a); |
381 |
|
382 |
return; |
383 |
} |
384 |
|
385 |
if(CAR(env->head)->type==tfloat |
386 |
&& CAR(CDR(env->head))->type==tfloat) { |
387 |
fa= CAR(env->head)->content.f; |
388 |
toss(env); if(env->err) return; |
389 |
fb= CAR(env->head)->content.f; |
390 |
toss(env); if(env->err) return; |
391 |
push_float(env, fb+fa); |
392 |
|
393 |
return; |
394 |
} |
395 |
|
396 |
if(CAR(env->head)->type==tfloat |
397 |
&& CAR(CDR(env->head))->type==integer) { |
398 |
fa= CAR(env->head)->content.f; |
399 |
toss(env); if(env->err) return; |
400 |
b= CAR(env->head)->content.i; |
401 |
toss(env); if(env->err) return; |
402 |
push_float(env, b+fa); |
403 |
|
404 |
return; |
405 |
} |
406 |
|
407 |
if(CAR(env->head)->type==integer |
408 |
&& CAR(CDR(env->head))->type==tfloat) { |
409 |
a= CAR(env->head)->content.i; |
410 |
toss(env); if(env->err) return; |
411 |
fb= CAR(env->head)->content.f; |
412 |
toss(env); if(env->err) return; |
413 |
push_float(env, fb+a); |
414 |
|
415 |
return; |
416 |
} |
417 |
|
418 |
printerr("Bad Argument Type"); |
419 |
env->err=2; |
420 |
} |
421 |
|
422 |
/* "-" */ |
423 |
extern void sx_2d(environment *env) |
424 |
{ |
425 |
int a, b; |
426 |
float fa, fb; |
427 |
|
428 |
if(env->head->type==empty || CDR(env->head)->type==empty) { |
429 |
printerr("Too Few Arguments"); |
430 |
env->err=1; |
431 |
return; |
432 |
} |
433 |
|
434 |
if(CAR(env->head)->type==integer |
435 |
&& CAR(CDR(env->head))->type==integer) { |
436 |
a= CAR(env->head)->content.i; |
437 |
toss(env); if(env->err) return; |
438 |
b= CAR(env->head)->content.i; |
439 |
toss(env); if(env->err) return; |
440 |
push_int(env, b-a); |
441 |
|
442 |
return; |
443 |
} |
444 |
|
445 |
if(CAR(env->head)->type==tfloat |
446 |
&& CAR(CDR(env->head))->type==tfloat) { |
447 |
fa= CAR(env->head)->content.f; |
448 |
toss(env); if(env->err) return; |
449 |
fb= CAR(env->head)->content.f; |
450 |
toss(env); if(env->err) return; |
451 |
push_float(env, fb-fa); |
452 |
|
453 |
return; |
454 |
} |
455 |
|
456 |
if(CAR(env->head)->type==tfloat |
457 |
&& CAR(CDR(env->head))->type==integer) { |
458 |
fa= CAR(env->head)->content.f; |
459 |
toss(env); if(env->err) return; |
460 |
b= CAR(env->head)->content.i; |
461 |
toss(env); if(env->err) return; |
462 |
push_float(env, b-fa); |
463 |
|
464 |
return; |
465 |
} |
466 |
|
467 |
if(CAR(env->head)->type==integer |
468 |
&& CAR(CDR(env->head))->type==tfloat) { |
469 |
a= CAR(env->head)->content.i; |
470 |
toss(env); if(env->err) return; |
471 |
fb= CAR(env->head)->content.f; |
472 |
toss(env); if(env->err) return; |
473 |
push_float(env, fb-a); |
474 |
|
475 |
return; |
476 |
} |
477 |
|
478 |
printerr("Bad Argument Type"); |
479 |
env->err=2; |
480 |
} |
481 |
|
482 |
/* ">" */ |
483 |
extern void sx_3e(environment *env) |
484 |
{ |
485 |
int a, b; |
486 |
float fa, fb; |
487 |
|
488 |
if(env->head->type==empty || CDR(env->head)->type==empty) { |
489 |
printerr("Too Few Arguments"); |
490 |
env->err= 1; |
491 |
return; |
492 |
} |
493 |
|
494 |
if(CAR(env->head)->type==integer |
495 |
&& CAR(CDR(env->head))->type==integer) { |
496 |
a= CAR(env->head)->content.i; |
497 |
toss(env); if(env->err) return; |
498 |
b= CAR(env->head)->content.i; |
499 |
toss(env); if(env->err) return; |
500 |
push_int(env, b>a); |
501 |
|
502 |
return; |
503 |
} |
504 |
|
505 |
if(CAR(env->head)->type==tfloat |
506 |
&& CAR(CDR(env->head))->type==tfloat) { |
507 |
fa= CAR(env->head)->content.f; |
508 |
toss(env); if(env->err) return; |
509 |
fb= CAR(env->head)->content.f; |
510 |
toss(env); if(env->err) return; |
511 |
push_int(env, fb>fa); |
512 |
|
513 |
return; |
514 |
} |
515 |
|
516 |
if(CAR(env->head)->type==tfloat |
517 |
&& CAR(CDR(env->head))->type==integer) { |
518 |
fa= CAR(env->head)->content.f; |
519 |
toss(env); if(env->err) return; |
520 |
b= CAR(env->head)->content.i; |
521 |
toss(env); if(env->err) return; |
522 |
push_int(env, b>fa); |
523 |
|
524 |
return; |
525 |
} |
526 |
|
527 |
if(CAR(env->head)->type==integer |
528 |
&& CAR(CDR(env->head))->type==tfloat) { |
529 |
a= CAR(env->head)->content.i; |
530 |
toss(env); if(env->err) return; |
531 |
fb= CAR(env->head)->content.f; |
532 |
toss(env); if(env->err) return; |
533 |
push_int(env, fb>a); |
534 |
|
535 |
return; |
536 |
} |
537 |
|
538 |
printerr("Bad Argument Type"); |
539 |
env->err= 2; |
540 |
} |
541 |
|
542 |
/* "<" */ |
543 |
extern void sx_3c(environment *env) |
544 |
{ |
545 |
swap(env); if(env->err) return; |
546 |
sx_3e(env); |
547 |
} |
548 |
|
549 |
/* "<=" */ |
550 |
extern void sx_3c3d(environment *env) |
551 |
{ |
552 |
sx_3e(env); if(env->err) return; |
553 |
not(env); |
554 |
} |
555 |
|
556 |
/* ">=" */ |
557 |
extern void sx_3e3d(environment *env) |
558 |
{ |
559 |
sx_3c(env); if(env->err) return; |
560 |
not(env); |
561 |
} |
562 |
|
563 |
/* "dup"; duplicates an item on the stack */ |
564 |
extern void sx_647570(environment *env) |
565 |
{ |
566 |
if(env->head->type==empty) { |
567 |
printerr("Too Few Arguments"); |
568 |
env->err= 1; |
569 |
return; |
570 |
} |
571 |
push_val(env, copy_val(env, CAR(env->head))); |
572 |
} |
573 |
|
574 |
/* "if", If-Then */ |
575 |
extern void sx_6966(environment *env) |
576 |
{ |
577 |
int truth; |
578 |
|
579 |
if(env->head->type==empty || CDR(env->head)->type==empty) { |
580 |
printerr("Too Few Arguments"); |
581 |
env->err= 1; |
582 |
return; |
583 |
} |
584 |
|
585 |
if(CAR(CDR(env->head))->type != integer) { |
586 |
printerr("Bad Argument Type"); |
587 |
env->err= 2; |
588 |
return; |
589 |
} |
590 |
|
591 |
swap(env); |
592 |
if(env->err) return; |
593 |
|
594 |
truth= CAR(env->head)->content.i; |
595 |
|
596 |
toss(env); |
597 |
if(env->err) return; |
598 |
|
599 |
if(truth) |
600 |
eval(env); |
601 |
else |
602 |
toss(env); |
603 |
} |
604 |
|
605 |
/* If-Then-Else */ |
606 |
extern void ifelse(environment *env) |
607 |
{ |
608 |
int truth; |
609 |
|
610 |
if(env->head->type==empty || CDR(env->head)->type==empty |
611 |
|| CDR(CDR(env->head))->type==empty) { |
612 |
printerr("Too Few Arguments"); |
613 |
env->err= 1; |
614 |
return; |
615 |
} |
616 |
|
617 |
if(CAR(CDR(CDR(env->head)))->type!=integer) { |
618 |
printerr("Bad Argument Type"); |
619 |
env->err= 2; |
620 |
return; |
621 |
} |
622 |
|
623 |
rot(env); |
624 |
if(env->err) return; |
625 |
|
626 |
truth= CAR(env->head)->content.i; |
627 |
|
628 |
toss(env); |
629 |
if(env->err) return; |
630 |
|
631 |
if(!truth) |
632 |
swap(env); |
633 |
if(env->err) return; |
634 |
|
635 |
toss(env); |
636 |
if(env->err) return; |
637 |
|
638 |
eval(env); |
639 |
} |
640 |
|
641 |
/* "else" */ |
642 |
extern void sx_656c7365(environment *env) |
643 |
{ |
644 |
if(env->head->type==empty || CDR(env->head)->type==empty |
645 |
|| CDR(CDR(env->head))->type==empty || CDR(CDR(CDR(env->head)))->type==empty |
646 |
|| CDR(CDR(CDR(CDR(env->head))))->type==empty) { |
647 |
printerr("Too Few Arguments"); |
648 |
env->err= 1; |
649 |
return; |
650 |
} |
651 |
|
652 |
if(CAR(CDR(env->head))->type!=symb |
653 |
|| strcmp(CAR(CDR(env->head))->content.sym->id, "then")!=0 |
654 |
|| CAR(CDR(CDR(CDR(env->head))))->type!=symb |
655 |
|| strcmp(CAR(CDR(CDR(CDR(env->head))))->content.sym->id, "if")!=0) { |
656 |
printerr("Bad Argument Type"); |
657 |
env->err= 2; |
658 |
return; |
659 |
} |
660 |
|
661 |
swap(env); toss(env); rot(env); toss(env); |
662 |
ifelse(env); |
663 |
} |
664 |
|
665 |
extern void then(environment *env) |
666 |
{ |
667 |
if(env->head->type==empty || CDR(env->head)->type==empty |
668 |
|| CDR(CDR(env->head))->type==empty) { |
669 |
printerr("Too Few Arguments"); |
670 |
env->err= 1; |
671 |
return; |
672 |
} |
673 |
|
674 |
if(CAR(CDR(env->head))->type!=symb |
675 |
|| strcmp(CAR(CDR(env->head))->content.sym->id, "if")!=0) { |
676 |
printerr("Bad Argument Type"); |
677 |
env->err= 2; |
678 |
return; |
679 |
} |
680 |
|
681 |
swap(env); toss(env); |
682 |
sx_6966(env); |
683 |
} |
684 |
|
685 |
/* "while" */ |
686 |
extern void sx_7768696c65(environment *env) |
687 |
{ |
688 |
int truth; |
689 |
value *loop, *test; |
690 |
|
691 |
if(env->head->type==empty || CDR(env->head)->type==empty) { |
692 |
printerr("Too Few Arguments"); |
693 |
env->err= 1; |
694 |
return; |
695 |
} |
696 |
|
697 |
loop= CAR(env->head); |
698 |
protect(loop); |
699 |
toss(env); if(env->err) return; |
700 |
|
701 |
test= CAR(env->head); |
702 |
protect(test); |
703 |
toss(env); if(env->err) return; |
704 |
|
705 |
do { |
706 |
push_val(env, test); |
707 |
eval(env); |
708 |
|
709 |
if(CAR(env->head)->type != integer) { |
710 |
printerr("Bad Argument Type"); |
711 |
env->err= 2; |
712 |
return; |
713 |
} |
714 |
|
715 |
truth= CAR(env->head)->content.i; |
716 |
toss(env); if(env->err) return; |
717 |
|
718 |
if(truth) { |
719 |
push_val(env, loop); |
720 |
eval(env); |
721 |
} else { |
722 |
toss(env); |
723 |
} |
724 |
|
725 |
} while(truth); |
726 |
|
727 |
unprotect(loop); unprotect(test); |
728 |
} |
729 |
|
730 |
|
731 |
/* "for"; for-loop */ |
732 |
extern void sx_666f72(environment *env) |
733 |
{ |
734 |
value *loop; |
735 |
int foo1, foo2; |
736 |
|
737 |
if(env->head->type==empty || CDR(env->head)->type==empty |
738 |
|| CDR(CDR(env->head))->type==empty) { |
739 |
printerr("Too Few Arguments"); |
740 |
env->err= 1; |
741 |
return; |
742 |
} |
743 |
|
744 |
if(CAR(CDR(env->head))->type!=integer |
745 |
|| CAR(CDR(CDR(env->head)))->type!=integer) { |
746 |
printerr("Bad Argument Type"); |
747 |
env->err= 2; |
748 |
return; |
749 |
} |
750 |
|
751 |
loop= CAR(env->head); |
752 |
protect(loop); |
753 |
toss(env); if(env->err) return; |
754 |
|
755 |
foo2= CAR(env->head)->content.i; |
756 |
toss(env); if(env->err) return; |
757 |
|
758 |
foo1= CAR(env->head)->content.i; |
759 |
toss(env); if(env->err) return; |
760 |
|
761 |
if(foo1<=foo2) { |
762 |
while(foo1<=foo2) { |
763 |
push_int(env, foo1); |
764 |
push_val(env, loop); |
765 |
eval(env); if(env->err) return; |
766 |
foo1++; |
767 |
} |
768 |
} else { |
769 |
while(foo1>=foo2) { |
770 |
push_int(env, foo1); |
771 |
push_val(env, loop); |
772 |
eval(env); if(env->err) return; |
773 |
foo1--; |
774 |
} |
775 |
} |
776 |
unprotect(loop); |
777 |
} |
778 |
|
779 |
/* Variant of for-loop |
780 |
Requires a list as first argument */ |
781 |
extern void foreach(environment *env) |
782 |
{ |
783 |
value *loop, *foo; |
784 |
value *iterator; |
785 |
|
786 |
if(env->head->type==empty || CDR(env->head)->type==empty) { |
787 |
printerr("Too Few Arguments"); |
788 |
env->err= 1; |
789 |
return; |
790 |
} |
791 |
|
792 |
if(CAR(CDR(env->head))->type!=tcons) { |
793 |
printerr("Bad Argument Type"); |
794 |
env->err= 2; |
795 |
return; |
796 |
} |
797 |
|
798 |
loop= CAR(env->head); |
799 |
protect(loop); |
800 |
toss(env); if(env->err) return; |
801 |
|
802 |
foo= CAR(env->head); |
803 |
protect(foo); |
804 |
toss(env); if(env->err) return; |
805 |
|
806 |
iterator= foo; |
807 |
|
808 |
while(iterator->type!=empty) { |
809 |
push_val(env, CAR(iterator)); |
810 |
push_val(env, loop); |
811 |
eval(env); if(env->err) return; |
812 |
if (iterator->type == tcons){ |
813 |
iterator= CDR(iterator); |
814 |
} else { |
815 |
printerr("Bad Argument Type"); /* Improper list */ |
816 |
env->err= 2; |
817 |
break; |
818 |
} |
819 |
} |
820 |
unprotect(loop); unprotect(foo); |
821 |
} |
822 |
|
823 |
/* "to" */ |
824 |
extern void to(environment *env) |
825 |
{ |
826 |
int ending, start, i; |
827 |
value *iterator, *temp, *end; |
828 |
|
829 |
end= new_val(env); |
830 |
|
831 |
if(env->head->type==empty || CDR(env->head)->type==empty) { |
832 |
printerr("Too Few Arguments"); |
833 |
env->err= 1; |
834 |
return; |
835 |
} |
836 |
|
837 |
if(CAR(env->head)->type!=integer |
838 |
|| CAR(CDR(env->head))->type!=integer) { |
839 |
printerr("Bad Argument Type"); |
840 |
env->err= 2; |
841 |
return; |
842 |
} |
843 |
|
844 |
ending= CAR(env->head)->content.i; |
845 |
toss(env); if(env->err) return; |
846 |
start= CAR(env->head)->content.i; |
847 |
toss(env); if(env->err) return; |
848 |
|
849 |
push_sym(env, "["); |
850 |
|
851 |
if(ending>=start) { |
852 |
for(i= ending; i>=start; i--) |
853 |
push_int(env, i); |
854 |
} else { |
855 |
for(i= ending; i<=start; i++) |
856 |
push_int(env, i); |
857 |
} |
858 |
|
859 |
iterator= env->head; |
860 |
|
861 |
if(iterator->type==empty |
862 |
|| (CAR(iterator)->type==symb |
863 |
&& CAR(iterator)->content.sym->id[0]=='[')) { |
864 |
temp= end; |
865 |
toss(env); |
866 |
} else { |
867 |
/* Search for first delimiter */ |
868 |
while(CDR(iterator)->type!=empty |
869 |
&& (CAR(CDR(iterator))->type!=symb |
870 |
|| CAR(CDR(iterator))->content.sym->id[0]!='[')) |
871 |
iterator= CDR(iterator); |
872 |
|
873 |
/* Extract list */ |
874 |
temp= env->head; |
875 |
env->head= CDR(iterator); |
876 |
CDR(iterator)= end; |
877 |
|
878 |
if(env->head->type!=empty) |
879 |
toss(env); |
880 |
} |
881 |
|
882 |
/* Push list */ |
883 |
push_val(env, temp); |
884 |
} |
885 |
|
886 |
/* Read a string */ |
887 |
extern void readline(environment *env) |
888 |
{ |
889 |
readlinestream(env, env->inputstream); |
890 |
} |
891 |
|
892 |
/* Read a string from a port */ |
893 |
extern void readlineport(environment *env) |
894 |
{ |
895 |
FILE *stream; |
896 |
|
897 |
if(env->head->type==empty) { |
898 |
printerr("Too Few Arguments"); |
899 |
env->err= 1; |
900 |
return; |
901 |
} |
902 |
|
903 |
if(CAR(env->head)->type!=port) { |
904 |
printerr("Bad Argument Type"); |
905 |
env->err= 2; |
906 |
return; |
907 |
} |
908 |
|
909 |
stream=CAR(env->head)->content.p; |
910 |
readlinestream(env, stream); if(env->err) return; |
911 |
|
912 |
swap(env); if(env->err) return; |
913 |
toss(env); |
914 |
} |
915 |
|
916 |
/* "read"; Read a value and place on stack */ |
917 |
extern void sx_72656164(environment *env) |
918 |
{ |
919 |
readstream(env, env->inputstream); |
920 |
} |
921 |
|
922 |
/* "readport"; Read a value from a port and place on stack */ |
923 |
extern void readport(environment *env) |
924 |
{ |
925 |
FILE *stream; |
926 |
|
927 |
if(env->head->type==empty) { |
928 |
printerr("Too Few Arguments"); |
929 |
env->err= 1; |
930 |
return; |
931 |
} |
932 |
|
933 |
if(CAR(env->head)->type!=port) { |
934 |
printerr("Bad Argument Type"); |
935 |
env->err= 2; |
936 |
return; |
937 |
} |
938 |
|
939 |
stream=CAR(env->head)->content.p; |
940 |
readstream(env, stream); if(env->err) return; |
941 |
|
942 |
swap(env); if(env->err) return; |
943 |
toss(env); |
944 |
} |
945 |
|
946 |
#ifdef __linux__ |
947 |
extern void beep(environment *env) |
948 |
{ |
949 |
int freq, dur, period, ticks; |
950 |
|
951 |
if(env->head->type==empty || CDR(env->head)->type==empty) { |
952 |
printerr("Too Few Arguments"); |
953 |
env->err= 1; |
954 |
return; |
955 |
} |
956 |
|
957 |
if(CAR(env->head)->type!=integer |
958 |
|| CAR(CDR(env->head))->type!=integer) { |
959 |
printerr("Bad Argument Type"); |
960 |
env->err= 2; |
961 |
return; |
962 |
} |
963 |
|
964 |
dur= CAR(env->head)->content.i; |
965 |
toss(env); |
966 |
freq= CAR(env->head)->content.i; |
967 |
toss(env); |
968 |
|
969 |
period= 1193180/freq; /* convert freq from Hz to period |
970 |
length */ |
971 |
ticks= dur*.001193180; /* convert duration from µseconds to |
972 |
timer ticks */ |
973 |
|
974 |
/* ticks=dur/1000; */ |
975 |
|
976 |
/* if (ioctl(STDOUT_FILENO, KDMKTONE, (125<<16) + 0x637)==0) */ |
977 |
switch (ioctl(STDOUT_FILENO, KDMKTONE, (ticks<<16) | period)){ |
978 |
case 0: |
979 |
usleep(dur); |
980 |
return; |
981 |
case -1: |
982 |
perror("beep"); |
983 |
env->err= 5; |
984 |
return; |
985 |
default: |
986 |
abort(); |
987 |
} |
988 |
} |
989 |
#endif /* __linux__ */ |
990 |
|
991 |
/* "wait" */ |
992 |
extern void sx_77616974(environment *env) |
993 |
{ |
994 |
int dur; |
995 |
|
996 |
if(env->head->type==empty) { |
997 |
printerr("Too Few Arguments"); |
998 |
env->err= 1; |
999 |
return; |
1000 |
} |
1001 |
|
1002 |
if(CAR(env->head)->type!=integer) { |
1003 |
printerr("Bad Argument Type"); |
1004 |
env->err= 2; |
1005 |
return; |
1006 |
} |
1007 |
|
1008 |
dur= CAR(env->head)->content.i; |
1009 |
toss(env); |
1010 |
|
1011 |
usleep(dur); |
1012 |
} |
1013 |
|
1014 |
/* "*" */ |
1015 |
extern void sx_2a(environment *env) |
1016 |
{ |
1017 |
int a, b; |
1018 |
float fa, fb; |
1019 |
|
1020 |
if(env->head->type==empty || CDR(env->head)->type==empty) { |
1021 |
printerr("Too Few Arguments"); |
1022 |
env->err= 1; |
1023 |
return; |
1024 |
} |
1025 |
|
1026 |
if(CAR(env->head)->type==integer |
1027 |
&& CAR(CDR(env->head))->type==integer) { |
1028 |
a= CAR(env->head)->content.i; |
1029 |
toss(env); if(env->err) return; |
1030 |
b= CAR(env->head)->content.i; |
1031 |
toss(env); if(env->err) return; |
1032 |
push_int(env, b*a); |
1033 |
|
1034 |
return; |
1035 |
} |
1036 |
|
1037 |
if(CAR(env->head)->type==tfloat |
1038 |
&& CAR(CDR(env->head))->type==tfloat) { |
1039 |
fa= CAR(env->head)->content.f; |
1040 |
toss(env); if(env->err) return; |
1041 |
fb= CAR(env->head)->content.f; |
1042 |
toss(env); if(env->err) return; |
1043 |
push_float(env, fb*fa); |
1044 |
|
1045 |
return; |
1046 |
} |
1047 |
|
1048 |
if(CAR(env->head)->type==tfloat |
1049 |
&& CAR(CDR(env->head))->type==integer) { |
1050 |
fa= CAR(env->head)->content.f; |
1051 |
toss(env); if(env->err) return; |
1052 |
b= CAR(env->head)->content.i; |
1053 |
toss(env); if(env->err) return; |
1054 |
push_float(env, b*fa); |
1055 |
|
1056 |
return; |
1057 |
} |
1058 |
|
1059 |
if(CAR(env->head)->type==integer |
1060 |
&& CAR(CDR(env->head))->type==tfloat) { |
1061 |
a= CAR(env->head)->content.i; |
1062 |
toss(env); if(env->err) return; |
1063 |
fb= CAR(env->head)->content.f; |
1064 |
toss(env); if(env->err) return; |
1065 |
push_float(env, fb*a); |
1066 |
|
1067 |
return; |
1068 |
} |
1069 |
|
1070 |
printerr("Bad Argument Type"); |
1071 |
env->err= 2; |
1072 |
} |
1073 |
|
1074 |
/* "/" */ |
1075 |
extern void sx_2f(environment *env) |
1076 |
{ |
1077 |
int a, b; |
1078 |
float fa, fb; |
1079 |
|
1080 |
if(env->head->type==empty || CDR(env->head)->type==empty) { |
1081 |
printerr("Too Few Arguments"); |
1082 |
env->err= 1; |
1083 |
return; |
1084 |
} |
1085 |
|
1086 |
if(CAR(env->head)->type==integer |
1087 |
&& CAR(CDR(env->head))->type==integer) { |
1088 |
a= CAR(env->head)->content.i; |
1089 |
toss(env); if(env->err) return; |
1090 |
b= CAR(env->head)->content.i; |
1091 |
toss(env); if(env->err) return; |
1092 |
push_float(env, b/a); |
1093 |
|
1094 |
return; |
1095 |
} |
1096 |
|
1097 |
if(CAR(env->head)->type==tfloat |
1098 |
&& CAR(CDR(env->head))->type==tfloat) { |
1099 |
fa= CAR(env->head)->content.f; |
1100 |
toss(env); if(env->err) return; |
1101 |
fb= CAR(env->head)->content.f; |
1102 |
toss(env); if(env->err) return; |
1103 |
push_float(env, fb/fa); |
1104 |
|
1105 |
return; |
1106 |
} |
1107 |
|
1108 |
if(CAR(env->head)->type==tfloat |
1109 |
&& CAR(CDR(env->head))->type==integer) { |
1110 |
fa= CAR(env->head)->content.f; |
1111 |
toss(env); if(env->err) return; |
1112 |
b= CAR(env->head)->content.i; |
1113 |
toss(env); if(env->err) return; |
1114 |
push_float(env, b/fa); |
1115 |
|
1116 |
return; |
1117 |
} |
1118 |
|
1119 |
if(CAR(env->head)->type==integer |
1120 |
&& CAR(CDR(env->head))->type==tfloat) { |
1121 |
a= CAR(env->head)->content.i; |
1122 |
toss(env); if(env->err) return; |
1123 |
fb= CAR(env->head)->content.f; |
1124 |
toss(env); if(env->err) return; |
1125 |
push_float(env, fb/a); |
1126 |
|
1127 |
return; |
1128 |
} |
1129 |
|
1130 |
printerr("Bad Argument Type"); |
1131 |
env->err= 2; |
1132 |
} |
1133 |
|
1134 |
/* "mod" */ |
1135 |
extern void mod(environment *env) |
1136 |
{ |
1137 |
int a, b; |
1138 |
|
1139 |
if(env->head->type==empty || CDR(env->head)->type==empty) { |
1140 |
printerr("Too Few Arguments"); |
1141 |
env->err= 1; |
1142 |
return; |
1143 |
} |
1144 |
|
1145 |
if(CAR(env->head)->type==integer |
1146 |
&& CAR(CDR(env->head))->type==integer) { |
1147 |
a= CAR(env->head)->content.i; |
1148 |
toss(env); if(env->err) return; |
1149 |
b= CAR(env->head)->content.i; |
1150 |
toss(env); if(env->err) return; |
1151 |
push_int(env, b%a); |
1152 |
|
1153 |
return; |
1154 |
} |
1155 |
|
1156 |
printerr("Bad Argument Type"); |
1157 |
env->err= 2; |
1158 |
} |
1159 |
|
1160 |
/* "div" */ |
1161 |
extern void sx_646976(environment *env) |
1162 |
{ |
1163 |
int a, b; |
1164 |
|
1165 |
if(env->head->type==empty || CDR(env->head)->type==empty) { |
1166 |
printerr("Too Few Arguments"); |
1167 |
env->err= 1; |
1168 |
return; |
1169 |
} |
1170 |
|
1171 |
if(CAR(env->head)->type==integer |
1172 |
&& CAR(CDR(env->head))->type==integer) { |
1173 |
a= CAR(env->head)->content.i; |
1174 |
toss(env); if(env->err) return; |
1175 |
b= CAR(env->head)->content.i; |
1176 |
toss(env); if(env->err) return; |
1177 |
push_int(env, (int)b/a); |
1178 |
|
1179 |
return; |
1180 |
} |
1181 |
|
1182 |
printerr("Bad Argument Type"); |
1183 |
env->err= 2; |
1184 |
} |
1185 |
|
1186 |
extern void setcar(environment *env) |
1187 |
{ |
1188 |
if(env->head->type==empty || CDR(env->head)->type==empty) { |
1189 |
printerr("Too Few Arguments"); |
1190 |
env->err= 1; |
1191 |
return; |
1192 |
} |
1193 |
|
1194 |
if(CDR(env->head)->type!=tcons) { |
1195 |
printerr("Bad Argument Type"); |
1196 |
env->err= 2; |
1197 |
return; |
1198 |
} |
1199 |
|
1200 |
CAR(CAR(CDR(env->head)))=CAR(env->head); |
1201 |
toss(env); |
1202 |
} |
1203 |
|
1204 |
extern void setcdr(environment *env) |
1205 |
{ |
1206 |
if(env->head->type==empty || CDR(env->head)->type==empty) { |
1207 |
printerr("Too Few Arguments"); |
1208 |
env->err= 1; |
1209 |
return; |
1210 |
} |
1211 |
|
1212 |
if(CDR(env->head)->type!=tcons) { |
1213 |
printerr("Bad Argument Type"); |
1214 |
env->err= 2; |
1215 |
return; |
1216 |
} |
1217 |
|
1218 |
CDR(CAR(CDR(env->head)))=CAR(env->head); |
1219 |
toss(env); |
1220 |
} |
1221 |
|
1222 |
extern void car(environment *env) |
1223 |
{ |
1224 |
if(env->head->type==empty) { |
1225 |
printerr("Too Few Arguments"); |
1226 |
env->err= 1; |
1227 |
return; |
1228 |
} |
1229 |
|
1230 |
if(CAR(env->head)->type!=tcons) { |
1231 |
printerr("Bad Argument Type"); |
1232 |
env->err= 2; |
1233 |
return; |
1234 |
} |
1235 |
|
1236 |
CAR(env->head)=CAR(CAR(env->head)); |
1237 |
} |
1238 |
|
1239 |
extern void cdr(environment *env) |
1240 |
{ |
1241 |
if(env->head->type==empty) { |
1242 |
printerr("Too Few Arguments"); |
1243 |
env->err= 1; |
1244 |
return; |
1245 |
} |
1246 |
|
1247 |
if(CAR(env->head)->type!=tcons) { |
1248 |
printerr("Bad Argument Type"); |
1249 |
env->err= 2; |
1250 |
return; |
1251 |
} |
1252 |
|
1253 |
CAR(env->head)=CDR(CAR(env->head)); |
1254 |
} |
1255 |
|
1256 |
extern void cons(environment *env) |
1257 |
{ |
1258 |
value *val; |
1259 |
|
1260 |
if(env->head->type==empty || CDR(env->head)->type==empty) { |
1261 |
printerr("Too Few Arguments"); |
1262 |
env->err= 1; |
1263 |
return; |
1264 |
} |
1265 |
|
1266 |
val=new_val(env); |
1267 |
val->content.c= malloc(sizeof(pair)); |
1268 |
assert(val->content.c!=NULL); |
1269 |
|
1270 |
env->gc_count += sizeof(pair); |
1271 |
val->type=tcons; |
1272 |
|
1273 |
CAR(val)= CAR(CDR(env->head)); |
1274 |
CDR(val)= CAR(env->head); |
1275 |
|
1276 |
push_val(env, val); |
1277 |
|
1278 |
swap(env); if(env->err) return; |
1279 |
toss(env); if(env->err) return; |
1280 |
swap(env); if(env->err) return; |
1281 |
toss(env); if(env->err) return; |
1282 |
} |
1283 |
|
1284 |
|
1285 |
/* General assoc function */ |
1286 |
void assocgen(environment *env, funcp eqfunc) |
1287 |
{ |
1288 |
value *key, *item; |
1289 |
|
1290 |
/* Needs two values on the stack, the top one must be an association |
1291 |
list */ |
1292 |
if(env->head->type==empty || CDR(env->head)->type==empty) { |
1293 |
printerr("Too Few Arguments"); |
1294 |
env->err= 1; |
1295 |
return; |
1296 |
} |
1297 |
|
1298 |
if(CAR(env->head)->type!=tcons) { |
1299 |
printerr("Bad Argument Type"); |
1300 |
env->err= 2; |
1301 |
return; |
1302 |
} |
1303 |
|
1304 |
key=CAR(CDR(env->head)); |
1305 |
item=CAR(env->head); |
1306 |
|
1307 |
while(item->type == tcons){ |
1308 |
if(CAR(item)->type != tcons){ |
1309 |
printerr("Bad Argument Type"); |
1310 |
env->err= 2; |
1311 |
return; |
1312 |
} |
1313 |
push_val(env, key); |
1314 |
push_val(env, CAR(CAR(item))); |
1315 |
eqfunc(env); if(env->err) return; |
1316 |
|
1317 |
/* Check the result of 'eqfunc' */ |
1318 |
if(env->head->type==empty) { |
1319 |
printerr("Too Few Arguments"); |
1320 |
env->err= 1; |
1321 |
return; |
1322 |
} |
1323 |
if(CAR(env->head)->type!=integer) { |
1324 |
printerr("Bad Argument Type"); |
1325 |
env->err= 2; |
1326 |
return; |
1327 |
} |
1328 |
|
1329 |
if(CAR(env->head)->content.i){ |
1330 |
toss(env); if(env->err) return; |
1331 |
break; |
1332 |
} |
1333 |
toss(env); if(env->err) return; |
1334 |
|
1335 |
if(item->type!=tcons) { |
1336 |
printerr("Bad Argument Type"); |
1337 |
env->err= 2; |
1338 |
return; |
1339 |
} |
1340 |
|
1341 |
item=CDR(item); |
1342 |
} |
1343 |
|
1344 |
if(item->type == tcons){ /* A match was found */ |
1345 |
push_val(env, CAR(item)); |
1346 |
} else { |
1347 |
push_int(env, 0); |
1348 |
} |
1349 |
swap(env); if(env->err) return; |
1350 |
toss(env); if(env->err) return; |
1351 |
swap(env); if(env->err) return; |
1352 |
toss(env); |
1353 |
} |
1354 |
|
1355 |
|
1356 |
/* 2: 3 => */ |
1357 |
/* 1: [ [ 1 . 2 ] [ 3 . 4 ] ] => 1: [ 3 . 4 ] */ |
1358 |
extern void assq(environment *env) |
1359 |
{ |
1360 |
assocgen(env, eq); |
1361 |
} |
1362 |
|
1363 |
|
1364 |
/* "do" */ |
1365 |
extern void sx_646f(environment *env) |
1366 |
{ |
1367 |
swap(env); if(env->err) return; |
1368 |
eval(env); |
1369 |
} |
1370 |
|
1371 |
/* "open" */ |
1372 |
/* 2: "file" */ |
1373 |
/* 1: "r" => 1: #<port 0x47114711> */ |
1374 |
extern void sx_6f70656e(environment *env) |
1375 |
{ |
1376 |
value *new_port; |
1377 |
FILE *stream; |
1378 |
|
1379 |
if(env->head->type == empty || CDR(env->head)->type == empty) { |
1380 |
printerr("Too Few Arguments"); |
1381 |
env->err=1; |
1382 |
return; |
1383 |
} |
1384 |
|
1385 |
if(CAR(env->head)->type != string |
1386 |
|| CAR(CDR(env->head))->type != string) { |
1387 |
printerr("Bad Argument Type"); |
1388 |
env->err= 2; |
1389 |
return; |
1390 |
} |
1391 |
|
1392 |
stream=fopen(CAR(CDR(env->head))->content.ptr, |
1393 |
CAR(env->head)->content.ptr); |
1394 |
|
1395 |
if(stream == NULL) { |
1396 |
perror("open"); |
1397 |
env->err= 5; |
1398 |
return; |
1399 |
} |
1400 |
|
1401 |
new_port=new_val(env); |
1402 |
new_port->type=port; |
1403 |
new_port->content.p=stream; |
1404 |
|
1405 |
push_val(env, new_port); |
1406 |
|
1407 |
swap(env); if(env->err) return; |
1408 |
toss(env); if(env->err) return; |
1409 |
swap(env); if(env->err) return; |
1410 |
toss(env); |
1411 |
} |
1412 |
|
1413 |
|
1414 |
/* "close" */ |
1415 |
extern void sx_636c6f7365(environment *env) |
1416 |
{ |
1417 |
int ret; |
1418 |
|
1419 |
if(env->head->type == empty) { |
1420 |
printerr("Too Few Arguments"); |
1421 |
env->err=1; |
1422 |
return; |
1423 |
} |
1424 |
|
1425 |
if(CAR(env->head)->type != port) { |
1426 |
printerr("Bad Argument Type"); |
1427 |
env->err= 2; |
1428 |
return; |
1429 |
} |
1430 |
|
1431 |
ret= fclose(CAR(env->head)->content.p); |
1432 |
|
1433 |
if(ret != 0){ |
1434 |
perror("close"); |
1435 |
env->err= 5; |
1436 |
return; |
1437 |
} |
1438 |
|
1439 |
toss(env); |
1440 |
} |
1441 |
|
1442 |
extern void mangle(environment *env) |
1443 |
{ |
1444 |
char *new_string; |
1445 |
|
1446 |
if(env->head->type==empty) { |
1447 |
printerr("Too Few Arguments"); |
1448 |
env->err= 1; |
1449 |
return; |
1450 |
} |
1451 |
|
1452 |
if(CAR(env->head)->type!=string) { |
1453 |
printerr("Bad Argument Type"); |
1454 |
env->err= 2; |
1455 |
return; |
1456 |
} |
1457 |
|
1458 |
new_string= mangle_str(CAR(env->head)->content.string); |
1459 |
|
1460 |
toss(env); |
1461 |
if(env->err) return; |
1462 |
|
1463 |
push_cstring(env, new_string); |
1464 |
} |
1465 |
|