1 |
|
/* -*- coding: utf-8; -*- */ |
2 |
/* |
/* |
3 |
stack - an interactive interpreter for a stack-based language |
stack - an interactive interpreter for a stack-based language |
4 |
Copyright (C) 2002 Mats Alritzson and Teddy Hogeborn |
Copyright (C) 2002 Mats Alritzson and Teddy Hogeborn |
21 |
Teddy Hogeborn <teddy@fukt.bth.se> |
Teddy Hogeborn <teddy@fukt.bth.se> |
22 |
*/ |
*/ |
23 |
|
|
24 |
#define CAR(X) X->content.c->car |
#define CAR(X) ((X)->content.c->car) |
25 |
#define CDR(X) X->content.c->cdr |
#define CDR(X) ((X)->content.c->cdr) |
26 |
|
|
27 |
/* printf, sscanf, fgets, fprintf, fopen, perror */ |
/* printf, sscanf, fgets, fprintf, fopen, perror */ |
28 |
#include <stdio.h> |
#include <stdio.h> |
38 |
#include <unistd.h> |
#include <unistd.h> |
39 |
/* EX_NOINPUT, EX_USAGE */ |
/* EX_NOINPUT, EX_USAGE */ |
40 |
#include <sysexits.h> |
#include <sysexits.h> |
41 |
|
/* assert */ |
42 |
|
#include <assert.h> |
43 |
|
|
44 |
|
#ifdef __linux__ |
45 |
/* mtrace, muntrace */ |
/* mtrace, muntrace */ |
46 |
#include <mcheck.h> |
#include <mcheck.h> |
47 |
/* ioctl */ |
/* ioctl */ |
48 |
#include <sys/ioctl.h> |
#include <sys/ioctl.h> |
49 |
/* KDMKTONE */ |
/* KDMKTONE */ |
50 |
#include <linux/kd.h> |
#include <linux/kd.h> |
51 |
|
#endif /* __linux__ */ |
52 |
|
|
53 |
#include "stack.h" |
#include "stack.h" |
54 |
|
|
61 |
env->gc_count= 0; |
env->gc_count= 0; |
62 |
env->gc_ref= NULL; |
env->gc_ref= NULL; |
63 |
|
|
64 |
env->head= NULL; |
env->head= new_val(env); |
65 |
for(i= 0; i<HASHTBLSIZE; i++) |
for(i= 0; i<HASHTBLSIZE; i++) |
66 |
env->symbols[i]= NULL; |
env->symbols[i]= NULL; |
67 |
env->err= 0; |
env->err= 0; |
79 |
/* Discard the top element of the stack. */ |
/* Discard the top element of the stack. */ |
80 |
extern void toss(environment *env) |
extern void toss(environment *env) |
81 |
{ |
{ |
82 |
if(env->head==NULL) { |
if(env->head->type==empty) { |
83 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
84 |
env->err= 1; |
env->err= 1; |
85 |
return; |
return; |
123 |
value *nval= malloc(sizeof(value)); |
value *nval= malloc(sizeof(value)); |
124 |
stackitem *nitem= malloc(sizeof(stackitem)); |
stackitem *nitem= malloc(sizeof(stackitem)); |
125 |
|
|
126 |
|
assert(nval != NULL); |
127 |
|
assert(nitem != NULL); |
128 |
|
|
129 |
nval->content.ptr= NULL; |
nval->content.ptr= NULL; |
130 |
|
nval->type= empty; |
131 |
|
|
132 |
nitem->item= nval; |
nitem->item= nval; |
133 |
nitem->next= env->gc_ref; |
nitem->next= env->gc_ref; |
168 |
extern void gc_init(environment *env) |
extern void gc_init(environment *env) |
169 |
{ |
{ |
170 |
stackitem *new_head= NULL, *titem; |
stackitem *new_head= NULL, *titem; |
|
cons *iterator; |
|
171 |
symbol *tsymb; |
symbol *tsymb; |
172 |
int i; |
int i; |
173 |
|
|
191 |
if(env->interactive) |
if(env->interactive) |
192 |
printf("."); |
printf("."); |
193 |
|
|
|
|
|
194 |
env->gc_count= 0; |
env->gc_count= 0; |
195 |
|
|
196 |
while(env->gc_ref!=NULL) { /* Sweep unused values */ |
while(env->gc_ref!=NULL) { /* Sweep unused values */ |
197 |
|
|
198 |
if(!(env->gc_ref->item->gc.no_gc)){ /* neither mark nor protect */ |
if(!(env->gc_ref->item->gc.no_gc)){ /* neither mark nor protect */ |
199 |
|
|
200 |
if(env->gc_ref->item->type==string) /* Remove content */ |
/* Remove content */ |
201 |
|
switch(env->gc_ref->item->type){ |
202 |
|
case string: |
203 |
free(env->gc_ref->item->content.ptr); |
free(env->gc_ref->item->content.ptr); |
204 |
|
break; |
205 |
|
case tcons: |
206 |
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free(env->gc_ref->item->content.c); |
207 |
|
break; |
208 |
|
case empty: |
209 |
|
case integer: |
210 |
|
case tfloat: |
211 |
|
case func: |
212 |
|
case symb: |
213 |
|
/* Symbol strings are freed when walking the hash table */ |
214 |
|
} |
215 |
|
|
216 |
free(env->gc_ref->item); /* Remove from gc_ref */ |
free(env->gc_ref->item); /* Remove from gc_ref */ |
217 |
titem= env->gc_ref->next; |
titem= env->gc_ref->next; |
218 |
free(env->gc_ref); /* Remove value */ |
free(env->gc_ref); /* Remove value */ |
219 |
env->gc_ref= titem; |
env->gc_ref= titem; |
220 |
continue; |
continue; |
221 |
} |
} |
222 |
|
#ifdef DEBUG |
223 |
|
printf("Kept value (%p)", env->gc_ref->item); |
224 |
|
if(env->gc_ref->item->gc.flag.mark) |
225 |
|
printf(" (marked)"); |
226 |
|
if(env->gc_ref->item->gc.flag.protect) |
227 |
|
printf(" (protected)"); |
228 |
|
switch(env->gc_ref->item->type){ |
229 |
|
case integer: |
230 |
|
printf(" integer: %d", env->gc_ref->item->content.i); |
231 |
|
break; |
232 |
|
case func: |
233 |
|
printf(" func: %p", env->gc_ref->item->content.ptr); |
234 |
|
break; |
235 |
|
case symb: |
236 |
|
printf(" symb: %s", env->gc_ref->item->content.sym->id); |
237 |
|
break; |
238 |
|
case tcons: |
239 |
|
printf(" tcons: %p\t%p", env->gc_ref->item->content.c->car, |
240 |
|
env->gc_ref->item->content.c->cdr); |
241 |
|
break; |
242 |
|
default: |
243 |
|
printf(" <unknown %d>", (env->gc_ref->item->type)); |
244 |
|
} |
245 |
|
printf("\n"); |
246 |
|
#endif /* DEBUG */ |
247 |
|
|
248 |
/* Keep values */ |
/* Keep values */ |
249 |
env->gc_count += sizeof(value); |
env->gc_count += sizeof(value); |
250 |
if(env->gc_ref->item->type==string) |
if(env->gc_ref->item->type==string) |
251 |
env->gc_count += strlen(env->gc_ref->item->content.ptr); |
env->gc_count += strlen(env->gc_ref->item->content.ptr)+1; |
252 |
|
|
253 |
titem= env->gc_ref->next; |
titem= env->gc_ref->next; |
254 |
env->gc_ref->next= new_head; |
env->gc_ref->next= new_head; |
263 |
env->gc_ref= new_head; |
env->gc_ref= new_head; |
264 |
|
|
265 |
if(env->interactive) |
if(env->interactive) |
266 |
printf("done\n"); |
printf("done (%d bytes still allocated)\n", env->gc_count); |
267 |
|
|
268 |
} |
} |
269 |
|
|
300 |
{ |
{ |
301 |
value *new_value= new_val(env); |
value *new_value= new_val(env); |
302 |
|
|
303 |
new_value->content.c= malloc(sizeof(cons)); |
new_value->content.c= malloc(sizeof(pair)); |
304 |
|
assert(new_value->content.c!=NULL); |
305 |
|
env->gc_count += sizeof(pair); |
306 |
new_value->type= tcons; |
new_value->type= tcons; |
307 |
CAR(new_value)= val; |
CAR(new_value)= val; |
308 |
CDR(new_value)= env->head; |
CDR(new_value)= env->head; |
338 |
int length= strlen(in_string)+1; |
int length= strlen(in_string)+1; |
339 |
|
|
340 |
new_value->content.ptr= malloc(length); |
new_value->content.ptr= malloc(length); |
341 |
|
assert(new_value != NULL); |
342 |
env->gc_count += length; |
env->gc_count += length; |
343 |
strcpy(new_value->content.ptr, in_string); |
strcpy(new_value->content.ptr, in_string); |
344 |
new_value->type= string; |
new_value->type= string; |
353 |
char *new_string, *current; |
char *new_string, *current; |
354 |
|
|
355 |
new_string= malloc((strlen(old_string)*2)+4); |
new_string= malloc((strlen(old_string)*2)+4); |
356 |
|
assert(new_string != NULL); |
357 |
strcpy(new_string, "sx_"); /* Stack eXternal */ |
strcpy(new_string, "sx_"); /* Stack eXternal */ |
358 |
current= new_string+3; |
current= new_string+3; |
359 |
while(old_string[0] != '\0'){ |
while(old_string[0] != '\0'){ |
371 |
{ |
{ |
372 |
char *new_string; |
char *new_string; |
373 |
|
|
374 |
if(env->head==NULL) { |
if(env->head->type==empty) { |
375 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
376 |
env->err= 1; |
env->err= 1; |
377 |
return; |
return; |
423 |
|
|
424 |
/* Create a new symbol */ |
/* Create a new symbol */ |
425 |
(*new_symbol)= malloc(sizeof(symbol)); |
(*new_symbol)= malloc(sizeof(symbol)); |
426 |
|
assert((*new_symbol) != NULL); |
427 |
(*new_symbol)->val= NULL; /* undefined value */ |
(*new_symbol)->val= NULL; /* undefined value */ |
428 |
(*new_symbol)->next= NULL; |
(*new_symbol)->next= NULL; |
429 |
(*new_symbol)->id= malloc(strlen(in_string)+1); |
(*new_symbol)->id= malloc(strlen(in_string)+1); |
430 |
|
assert((*new_symbol)->id != NULL); |
431 |
strcpy((*new_symbol)->id, in_string); |
strcpy((*new_symbol)->id, in_string); |
432 |
|
|
433 |
/* Intern the new symbol in the hash table */ |
/* Intern the new symbol in the hash table */ |
470 |
/* Gets the type of a value */ |
/* Gets the type of a value */ |
471 |
extern void type(environment *env) |
extern void type(environment *env) |
472 |
{ |
{ |
473 |
int typenum; |
if(env->head->type==empty) { |
|
|
|
|
if(env->head==NULL) { |
|
474 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
475 |
env->err= 1; |
env->err= 1; |
476 |
return; |
return; |
477 |
} |
} |
478 |
|
|
479 |
typenum= CAR(env->head)->type; |
switch(CAR(env->head)->type){ |
480 |
toss(env); |
case empty: |
481 |
switch(typenum){ |
push_sym(env, "empty"); |
482 |
|
break; |
483 |
case integer: |
case integer: |
484 |
push_sym(env, "integer"); |
push_sym(env, "integer"); |
485 |
break; |
break; |
496 |
push_sym(env, "function"); |
push_sym(env, "function"); |
497 |
break; |
break; |
498 |
case tcons: |
case tcons: |
499 |
push_sym(env, "list"); |
push_sym(env, "pair"); |
500 |
break; |
break; |
501 |
} |
} |
502 |
|
swap(env); |
503 |
|
if (env->err) return; |
504 |
|
toss(env); |
505 |
} |
} |
506 |
|
|
507 |
/* Prints the top element of the stack. */ |
/* Print a value */ |
508 |
void print_h(value *stack_head, int noquote) |
void print_val(value *val, int noquote, stackitem *stack) |
509 |
{ |
{ |
510 |
switch(CAR(stack_head)->type) { |
stackitem *titem, *tstack; |
511 |
|
int depth; |
512 |
|
|
513 |
|
switch(val->type) { |
514 |
|
case empty: |
515 |
|
printf("[]"); |
516 |
|
break; |
517 |
case integer: |
case integer: |
518 |
printf("%d", CAR(stack_head)->content.i); |
printf("%d", val->content.i); |
519 |
break; |
break; |
520 |
case tfloat: |
case tfloat: |
521 |
printf("%f", CAR(stack_head)->content.f); |
printf("%f", val->content.f); |
522 |
break; |
break; |
523 |
case string: |
case string: |
524 |
if(noquote) |
if(noquote) |
525 |
printf("%s", (char*)CAR(stack_head)->content.ptr); |
printf("%s", (char*)(val->content.ptr)); |
526 |
else |
else |
527 |
printf("\"%s\"", (char*)CAR(stack_head)->content.ptr); |
printf("\"%s\"", (char*)(val->content.ptr)); |
528 |
break; |
break; |
529 |
case symb: |
case symb: |
530 |
printf("%s", CAR(stack_head)->content.sym->id); |
printf("%s", val->content.sym->id); |
531 |
break; |
break; |
532 |
case func: |
case func: |
533 |
printf("#<function %p>", (funcp)(CAR(stack_head)->content.ptr)); |
printf("#<function %p>", (funcp)(val->content.ptr)); |
534 |
break; |
break; |
535 |
case tcons: |
case tcons: |
|
/* A list is just a stack, so make stack_head point to it */ |
|
|
stack_head= CAR(stack_head); |
|
536 |
printf("[ "); |
printf("[ "); |
537 |
while(stack_head != NULL) { |
tstack= stack; |
538 |
print_h(stack_head, noquote); |
do { |
539 |
printf(" "); |
titem=malloc(sizeof(stackitem)); |
540 |
stack_head= CDR(stack_head); |
assert(titem != NULL); |
541 |
|
titem->item=val; |
542 |
|
titem->next=tstack; |
543 |
|
tstack=titem; /* Put it on the stack */ |
544 |
|
/* Search a stack of values being printed to see if we are already |
545 |
|
printing this value */ |
546 |
|
titem=tstack; |
547 |
|
depth=0; |
548 |
|
while(titem != NULL && titem->item != CAR(val)){ |
549 |
|
titem=titem->next; |
550 |
|
depth++; |
551 |
|
} |
552 |
|
if(titem != NULL){ /* If we found it on the stack, */ |
553 |
|
printf("#%d#", depth); /* print a depth reference */ |
554 |
|
} else { |
555 |
|
print_val(CAR(val), noquote, tstack); |
556 |
|
} |
557 |
|
val= CDR(val); |
558 |
|
switch(val->type){ |
559 |
|
case empty: |
560 |
|
break; |
561 |
|
case tcons: |
562 |
|
/* Search a stack of values being printed to see if we are already |
563 |
|
printing this value */ |
564 |
|
titem=tstack; |
565 |
|
depth=0; |
566 |
|
while(titem != NULL && titem->item != val){ |
567 |
|
titem=titem->next; |
568 |
|
depth++; |
569 |
|
} |
570 |
|
if(titem != NULL){ /* If we found it on the stack, */ |
571 |
|
printf(" . #%d#", depth); /* print a depth reference */ |
572 |
|
} else { |
573 |
|
printf(" "); |
574 |
|
} |
575 |
|
break; |
576 |
|
default: |
577 |
|
printf(" . "); /* Improper list */ |
578 |
|
print_val(val, noquote, tstack); |
579 |
|
} |
580 |
|
} while(val->type == tcons && titem == NULL); |
581 |
|
titem=tstack; |
582 |
|
while(titem != stack){ |
583 |
|
tstack=titem->next; |
584 |
|
free(titem); |
585 |
|
titem=tstack; |
586 |
} |
} |
587 |
printf("]"); |
printf(" ]"); |
588 |
break; |
break; |
589 |
} |
} |
590 |
} |
} |
591 |
|
|
592 |
extern void print_(environment *env) |
extern void print_(environment *env) |
593 |
{ |
{ |
594 |
if(env->head==NULL) { |
if(env->head->type==empty) { |
595 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
596 |
env->err= 1; |
env->err= 1; |
597 |
return; |
return; |
598 |
} |
} |
599 |
print_h(env->head, 0); |
print_val(CAR(env->head), 0, NULL); |
600 |
nl(); |
nl(); |
601 |
} |
} |
602 |
|
|
610 |
|
|
611 |
extern void princ_(environment *env) |
extern void princ_(environment *env) |
612 |
{ |
{ |
613 |
if(env->head==NULL) { |
if(env->head->type==empty) { |
614 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
615 |
env->err= 1; |
env->err= 1; |
616 |
return; |
return; |
617 |
} |
} |
618 |
print_h(env->head, 1); |
print_val(CAR(env->head), 1, NULL); |
619 |
} |
} |
620 |
|
|
621 |
/* Prints the top element of the stack and then discards it. */ |
/* Prints the top element of the stack and then discards it. */ |
629 |
/* Only to be called by function printstack. */ |
/* Only to be called by function printstack. */ |
630 |
void print_st(value *stack_head, long counter) |
void print_st(value *stack_head, long counter) |
631 |
{ |
{ |
632 |
if(CDR(stack_head) != NULL) |
if(CDR(stack_head)->type != empty) |
633 |
print_st(CDR(stack_head), counter+1); |
print_st(CDR(stack_head), counter+1); |
634 |
printf("%ld: ", counter); |
printf("%ld: ", counter); |
635 |
print_h(stack_head, 0); |
print_val(CAR(stack_head), 0, NULL); |
636 |
nl(); |
nl(); |
637 |
} |
} |
638 |
|
|
639 |
/* Prints the stack. */ |
/* Prints the stack. */ |
640 |
extern void printstack(environment *env) |
extern void printstack(environment *env) |
641 |
{ |
{ |
642 |
if(env->head == NULL) { |
if(env->head->type == empty) { |
643 |
printf("Stack Empty\n"); |
printf("Stack Empty\n"); |
644 |
return; |
return; |
645 |
} |
} |
652 |
{ |
{ |
653 |
value *temp= env->head; |
value *temp= env->head; |
654 |
|
|
655 |
if(env->head==NULL || CDR(env->head)==NULL) { |
if(env->head->type == empty || CDR(env->head)->type == empty) { |
656 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
657 |
env->err=1; |
env->err=1; |
658 |
return; |
return; |
668 |
{ |
{ |
669 |
value *temp= env->head; |
value *temp= env->head; |
670 |
|
|
671 |
if(env->head==NULL || CDR(env->head)==NULL |
if(env->head->type == empty || CDR(env->head)->type == empty |
672 |
|| CDR(CDR(env->head))==NULL) { |
|| CDR(CDR(env->head))->type == empty) { |
673 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
674 |
env->err= 1; |
env->err= 1; |
675 |
return; |
return; |
685 |
{ |
{ |
686 |
value *val; |
value *val; |
687 |
|
|
688 |
if(env->head==NULL) { |
if(env->head->type==empty) { |
689 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
690 |
env->err= 1; |
env->err= 1; |
691 |
return; |
return; |
703 |
env->err= 3; |
env->err= 3; |
704 |
return; |
return; |
705 |
} |
} |
706 |
protect(val); |
push_val(env, val); /* Return the symbol's bound value */ |
707 |
toss(env); /* toss the symbol */ |
swap(env); |
708 |
|
if(env->err) return; |
709 |
|
toss(env); /* toss the symbol */ |
710 |
if(env->err) return; |
if(env->err) return; |
|
push_val(env, val); /* Return its bound value */ |
|
|
unprotect(val); |
|
711 |
} |
} |
712 |
|
|
713 |
/* If the top element is a symbol, determine if it's bound to a |
/* If the top element is a symbol, determine if it's bound to a |
723 |
|
|
724 |
gc_maybe(env); |
gc_maybe(env); |
725 |
|
|
726 |
if(env->head==NULL) { |
if(env->head->type==empty) { |
727 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
728 |
env->err= 1; |
env->err= 1; |
729 |
return; |
return; |
754 |
toss(env); if(env->err) return; |
toss(env); if(env->err) return; |
755 |
iterator= temp_val; |
iterator= temp_val; |
756 |
|
|
757 |
while(iterator!=NULL) { |
while(iterator->type != empty) { |
758 |
push_val(env, CAR(iterator)); |
push_val(env, CAR(iterator)); |
759 |
|
|
760 |
if(CAR(env->head)->type==symb |
if(CAR(env->head)->type==symb |
762 |
toss(env); |
toss(env); |
763 |
if(env->err) return; |
if(env->err) return; |
764 |
|
|
765 |
if(CDR(iterator)==NULL){ |
if(CDR(iterator)->type == empty){ |
766 |
goto eval_start; |
goto eval_start; |
767 |
} |
} |
768 |
eval(env); |
eval(env); |
769 |
if(env->err) return; |
if(env->err) return; |
770 |
} |
} |
771 |
if (CDR(iterator)->type == tcons) |
if (CDR(iterator)->type == empty || CDR(iterator)->type == tcons) |
772 |
iterator= CDR(iterator); |
iterator= CDR(iterator); |
773 |
else { |
else { |
774 |
printerr("Bad Argument Type"); /* Improper list */ |
printerr("Bad Argument Type"); /* Improper list */ |
779 |
unprotect(temp_val); |
unprotect(temp_val); |
780 |
return; |
return; |
781 |
|
|
782 |
default: |
case empty: |
783 |
|
case integer: |
784 |
|
case tfloat: |
785 |
|
case string: |
786 |
return; |
return; |
787 |
} |
} |
788 |
} |
} |
792 |
{ |
{ |
793 |
value *old_head, *new_head, *item; |
value *old_head, *new_head, *item; |
794 |
|
|
795 |
if(env->head==NULL) { |
if(env->head->type==empty) { |
796 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
797 |
env->err= 1; |
env->err= 1; |
798 |
return; |
return; |
799 |
} |
} |
800 |
|
|
801 |
|
if(CAR(env->head)->type==empty) |
802 |
|
return; /* Don't reverse an empty list */ |
803 |
|
|
804 |
if(CAR(env->head)->type!=tcons) { |
if(CAR(env->head)->type!=tcons) { |
805 |
printerr("Bad Argument Type"); |
printerr("Bad Argument Type"); |
806 |
env->err= 2; |
env->err= 2; |
808 |
} |
} |
809 |
|
|
810 |
old_head= CAR(env->head); |
old_head= CAR(env->head); |
811 |
new_head= NULL; |
new_head= new_val(env); |
812 |
while(old_head!=NULL) { |
while(old_head->type != empty) { |
813 |
item= old_head; |
item= old_head; |
814 |
old_head= CDR(old_head); |
old_head= CDR(old_head); |
815 |
CDR(item)= new_head; |
CDR(item)= new_head; |
821 |
/* Make a list. */ |
/* Make a list. */ |
822 |
extern void pack(environment *env) |
extern void pack(environment *env) |
823 |
{ |
{ |
824 |
value *iterator, *temp; |
value *iterator, *temp, *ending; |
825 |
|
|
826 |
|
ending=new_val(env); |
827 |
|
|
828 |
iterator= env->head; |
iterator= env->head; |
829 |
if(iterator==NULL |
if(iterator->type == empty |
830 |
|| (CAR(iterator)->type==symb |
|| (CAR(iterator)->type==symb |
831 |
&& CAR(iterator)->content.sym->id[0]=='[')) { |
&& CAR(iterator)->content.sym->id[0]=='[')) { |
832 |
temp= NULL; |
temp= ending; |
833 |
toss(env); |
toss(env); |
834 |
} else { |
} else { |
835 |
/* Search for first delimiter */ |
/* Search for first delimiter */ |
836 |
while(CDR(iterator)!=NULL |
while(CDR(iterator)->type != empty |
837 |
&& (CAR(CDR(iterator))->type!=symb |
&& (CAR(CDR(iterator))->type!=symb |
838 |
|| CAR(CDR(iterator))->content.sym->id[0]!='[')) |
|| CAR(CDR(iterator))->content.sym->id[0]!='[')) |
839 |
iterator= CDR(iterator); |
iterator= CDR(iterator); |
841 |
/* Extract list */ |
/* Extract list */ |
842 |
temp= env->head; |
temp= env->head; |
843 |
env->head= CDR(iterator); |
env->head= CDR(iterator); |
844 |
CDR(iterator)= NULL; |
CDR(iterator)= ending; |
845 |
|
|
846 |
if(env->head!=NULL) |
if(env->head->type != empty) |
847 |
toss(env); |
toss(env); |
848 |
} |
} |
849 |
|
|
859 |
value *temp, *new_head; |
value *temp, *new_head; |
860 |
|
|
861 |
/* Is top element a list? */ |
/* Is top element a list? */ |
862 |
if(env->head==NULL) { |
if(env->head->type==empty) { |
863 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
864 |
env->err= 1; |
env->err= 1; |
865 |
return; |
return; |
882 |
toss(env); |
toss(env); |
883 |
|
|
884 |
/* Find the end of the list */ |
/* Find the end of the list */ |
885 |
while(CDR(temp)->content.ptr != NULL) { |
while(CDR(temp)->type != empty) { |
886 |
if (CDR(temp)->type == tcons) |
if (CDR(temp)->type == tcons) |
887 |
temp= CDR(temp); |
temp= CDR(temp); |
888 |
else { |
else { |
903 |
{ |
{ |
904 |
void *left, *right; |
void *left, *right; |
905 |
|
|
906 |
if(env->head==NULL || CDR(env->head)==NULL) { |
if(env->head->type==empty || CDR(env->head)->type==empty) { |
907 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
908 |
env->err= 1; |
env->err= 1; |
909 |
return; |
return; |
921 |
{ |
{ |
922 |
int val; |
int val; |
923 |
|
|
924 |
if(env->head==NULL) { |
if(env->head->type==empty) { |
925 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
926 |
env->err= 1; |
env->err= 1; |
927 |
return; |
return; |
952 |
symbol *sym; |
symbol *sym; |
953 |
|
|
954 |
/* Needs two values on the stack, the top one must be a symbol */ |
/* Needs two values on the stack, the top one must be a symbol */ |
955 |
if(env->head==NULL || CDR(env->head)==NULL) { |
if(env->head->type==empty || CDR(env->head)->type==empty) { |
956 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
957 |
env->err= 1; |
env->err= 1; |
958 |
return; |
return; |
991 |
env->gc_limit= 0; |
env->gc_limit= 0; |
992 |
gc_maybe(env); |
gc_maybe(env); |
993 |
|
|
994 |
|
words(env); |
995 |
|
|
996 |
if(env->free_string!=NULL) |
if(env->free_string!=NULL) |
997 |
free(env->free_string); |
free(env->free_string); |
998 |
|
|
999 |
|
#ifdef __linux__ |
1000 |
muntrace(); |
muntrace(); |
1001 |
|
#endif |
1002 |
|
|
1003 |
exit(EXIT_SUCCESS); |
exit(EXIT_SUCCESS); |
1004 |
} |
} |
1006 |
/* Clear stack */ |
/* Clear stack */ |
1007 |
extern void clear(environment *env) |
extern void clear(environment *env) |
1008 |
{ |
{ |
1009 |
while(env->head!=NULL) |
while(env->head->type != empty) |
1010 |
toss(env); |
toss(env); |
1011 |
} |
} |
1012 |
|
|
1019 |
for(i= 0; i<HASHTBLSIZE; i++) { |
for(i= 0; i<HASHTBLSIZE; i++) { |
1020 |
temp= env->symbols[i]; |
temp= env->symbols[i]; |
1021 |
while(temp!=NULL) { |
while(temp!=NULL) { |
1022 |
|
#ifdef DEBUG |
1023 |
|
if (temp->val != NULL && temp->val->gc.flag.protect) |
1024 |
|
printf("(protected) "); |
1025 |
|
#endif /* DEBUG */ |
1026 |
printf("%s\n", temp->id); |
printf("%s\n", temp->id); |
1027 |
temp= temp->next; |
temp= temp->next; |
1028 |
} |
} |
1045 |
extern void forget(environment *env) |
extern void forget(environment *env) |
1046 |
{ |
{ |
1047 |
char* sym_id; |
char* sym_id; |
|
value *stack_head= env->head; |
|
1048 |
|
|
1049 |
if(stack_head==NULL) { |
if(env->head->type==empty) { |
1050 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
1051 |
env->err= 1; |
env->err= 1; |
1052 |
return; |
return; |
1053 |
} |
} |
1054 |
|
|
1055 |
if(CAR(stack_head)->type!=symb) { |
if(CAR(env->head)->type!=symb) { |
1056 |
printerr("Bad Argument Type"); |
printerr("Bad Argument Type"); |
1057 |
env->err= 2; |
env->err= 2; |
1058 |
return; |
return; |
1059 |
} |
} |
1060 |
|
|
1061 |
sym_id= CAR(stack_head)->content.sym->id; |
sym_id= CAR(env->head)->content.sym->id; |
1062 |
toss(env); |
toss(env); |
1063 |
|
|
1064 |
return forget_sym(hash(env->symbols, sym_id)); |
return forget_sym(hash(env->symbols, sym_id)); |
1076 |
|
|
1077 |
int c; /* getopt option character */ |
int c; /* getopt option character */ |
1078 |
|
|
1079 |
|
#ifdef __linux__ |
1080 |
mtrace(); |
mtrace(); |
1081 |
|
#endif |
1082 |
|
|
1083 |
init_env(&myenv); |
init_env(&myenv); |
1084 |
|
|
1092 |
break; |
break; |
1093 |
case '?': |
case '?': |
1094 |
fprintf (stderr, |
fprintf (stderr, |
1095 |
"Unknown option character `\\x%x'.\n", |
"Unknown option character '\\x%x'.\n", |
1096 |
optopt); |
optopt); |
1097 |
return EX_USAGE; |
return EX_USAGE; |
1098 |
default: |
default: |
1111 |
if(myenv.interactive) { |
if(myenv.interactive) { |
1112 |
printf("Stack version $Revision$\n\ |
printf("Stack version $Revision$\n\ |
1113 |
Copyright (C) 2002 Mats Alritzson and Teddy Hogeborn\n\ |
Copyright (C) 2002 Mats Alritzson and Teddy Hogeborn\n\ |
1114 |
Stack comes with ABSOLUTELY NO WARRANTY; for details type `warranty;'.\n\ |
Stack comes with ABSOLUTELY NO WARRANTY; for details type 'warranty;'.\n\ |
1115 |
This is free software, and you are welcome to redistribute it\n\ |
This is free software, and you are welcome to redistribute it\n\ |
1116 |
under certain conditions; type `copying;' for details.\n"); |
under certain conditions; type 'copying;' for details.\n"); |
1117 |
} |
} |
1118 |
|
|
1119 |
while(1) { |
while(1) { |
1128 |
} |
} |
1129 |
myenv.err=0; |
myenv.err=0; |
1130 |
} |
} |
1131 |
sx_72656164(&myenv); |
sx_72656164(&myenv); /* "read" */ |
1132 |
if (myenv.err==4) { |
if (myenv.err==4) { /* EOF */ |
1133 |
return EXIT_SUCCESS; /* EOF */ |
myenv.err=0; |
1134 |
} else if(myenv.head!=NULL |
quit(&myenv); |
1135 |
|
} else if(myenv.head->type!=empty |
1136 |
&& CAR(myenv.head)->type==symb |
&& CAR(myenv.head)->type==symb |
1137 |
&& CAR(myenv.head)->content.sym->id[0] |
&& CAR(myenv.head)->content.sym->id[0] |
1138 |
==';') { |
==';') { |
1154 |
char* new_string; |
char* new_string; |
1155 |
value *a_val, *b_val; |
value *a_val, *b_val; |
1156 |
|
|
1157 |
if(env->head==NULL || CDR(env->head)==NULL) { |
if(env->head->type==empty || CDR(env->head)->type==empty) { |
1158 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
1159 |
env->err= 1; |
env->err= 1; |
1160 |
return; |
return; |
1169 |
toss(env); if(env->err) return; |
toss(env); if(env->err) return; |
1170 |
len= strlen(a_val->content.ptr)+strlen(b_val->content.ptr)+1; |
len= strlen(a_val->content.ptr)+strlen(b_val->content.ptr)+1; |
1171 |
new_string= malloc(len); |
new_string= malloc(len); |
1172 |
|
assert(new_string != NULL); |
1173 |
strcpy(new_string, b_val->content.ptr); |
strcpy(new_string, b_val->content.ptr); |
1174 |
strcat(new_string, a_val->content.ptr); |
strcat(new_string, a_val->content.ptr); |
1175 |
push_cstring(env, new_string); |
push_cstring(env, new_string); |
1233 |
int a, b; |
int a, b; |
1234 |
float fa, fb; |
float fa, fb; |
1235 |
|
|
1236 |
if(env->head==NULL || CDR(env->head)==NULL) { |
if(env->head->type==empty || CDR(env->head)->type==empty) { |
1237 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
1238 |
env->err=1; |
env->err=1; |
1239 |
return; |
return; |
1293 |
int a, b; |
int a, b; |
1294 |
float fa, fb; |
float fa, fb; |
1295 |
|
|
1296 |
if(env->head==NULL || CDR(env->head)==NULL) { |
if(env->head->type==empty || CDR(env->head)->type==empty) { |
1297 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
1298 |
env->err= 1; |
env->err= 1; |
1299 |
return; |
return; |
1378 |
|
|
1379 |
protect(old_value); |
protect(old_value); |
1380 |
new_value= new_val(env); |
new_value= new_val(env); |
|
protect(new_value); |
|
1381 |
new_value->type= old_value->type; |
new_value->type= old_value->type; |
1382 |
|
|
1383 |
switch(old_value->type){ |
switch(old_value->type){ |
1385 |
case integer: |
case integer: |
1386 |
case func: |
case func: |
1387 |
case symb: |
case symb: |
1388 |
|
case empty: |
1389 |
new_value->content= old_value->content; |
new_value->content= old_value->content; |
1390 |
break; |
break; |
1391 |
case string: |
case string: |
1393 |
strdup((char *)(old_value->content.ptr)); |
strdup((char *)(old_value->content.ptr)); |
1394 |
break; |
break; |
1395 |
case tcons: |
case tcons: |
|
new_value= NULL; |
|
1396 |
|
|
1397 |
new_value->content.c= malloc(sizeof(cons)); |
new_value->content.c= malloc(sizeof(pair)); |
1398 |
|
assert(new_value->content.c!=NULL); |
1399 |
|
env->gc_count += sizeof(pair); |
1400 |
|
|
1401 |
CAR(new_value)= copy_val(env, CAR(old_value)); /* recurse */ |
CAR(new_value)= copy_val(env, CAR(old_value)); /* recurse */ |
1402 |
CDR(new_value)= copy_val(env, CDR(old_value)); /* recurse */ |
CDR(new_value)= copy_val(env, CDR(old_value)); /* recurse */ |
1403 |
break; |
break; |
1404 |
} |
} |
1405 |
|
|
1406 |
unprotect(old_value); unprotect(new_value); |
unprotect(old_value); |
1407 |
|
|
1408 |
return new_value; |
return new_value; |
1409 |
} |
} |
1411 |
/* "dup"; duplicates an item on the stack */ |
/* "dup"; duplicates an item on the stack */ |
1412 |
extern void sx_647570(environment *env) |
extern void sx_647570(environment *env) |
1413 |
{ |
{ |
1414 |
if(env->head==NULL) { |
if(env->head->type==empty) { |
1415 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
1416 |
env->err= 1; |
env->err= 1; |
1417 |
return; |
return; |
1424 |
{ |
{ |
1425 |
int truth; |
int truth; |
1426 |
|
|
1427 |
if(env->head==NULL || CDR(env->head)==NULL) { |
if(env->head->type==empty || CDR(env->head)->type==empty) { |
1428 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
1429 |
env->err= 1; |
env->err= 1; |
1430 |
return; |
return; |
1455 |
{ |
{ |
1456 |
int truth; |
int truth; |
1457 |
|
|
1458 |
if(env->head==NULL || CDR(env->head)==NULL |
if(env->head->type==empty || CDR(env->head)->type==empty |
1459 |
|| CDR(CDR(env->head))==NULL) { |
|| CDR(CDR(env->head))->type==empty) { |
1460 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
1461 |
env->err= 1; |
env->err= 1; |
1462 |
return; |
return; |
1488 |
|
|
1489 |
extern void sx_656c7365(environment *env) |
extern void sx_656c7365(environment *env) |
1490 |
{ |
{ |
1491 |
if(env->head==NULL || CDR(env->head)==NULL |
if(env->head->type==empty || CDR(env->head)->type==empty |
1492 |
|| CDR(CDR(env->head))==NULL || CDR(CDR(CDR(env->head)))==NULL) { |
|| CDR(CDR(env->head))->type==empty || CDR(CDR(CDR(env->head)))->type==empty |
1493 |
|
|| CDR(CDR(CDR(CDR(env->head))))->type==empty) { |
1494 |
|
printerr("Too Few Arguments"); |
1495 |
|
env->err= 1; |
1496 |
|
return; |
1497 |
|
} |
1498 |
|
|
1499 |
|
if(CAR(CDR(env->head))->type!=symb |
1500 |
|
|| strcmp(CAR(CDR(env->head))->content.sym->id, "then")!=0 |
1501 |
|
|| CAR(CDR(CDR(CDR(env->head))))->type!=symb |
1502 |
|
|| strcmp(CAR(CDR(CDR(CDR(env->head))))->content.sym->id, "if")!=0) { |
1503 |
|
printerr("Bad Argument Type"); |
1504 |
|
env->err= 2; |
1505 |
|
return; |
1506 |
|
} |
1507 |
|
|
1508 |
|
swap(env); toss(env); rot(env); toss(env); |
1509 |
|
ifelse(env); |
1510 |
|
} |
1511 |
|
|
1512 |
|
extern void then(environment *env) |
1513 |
|
{ |
1514 |
|
if(env->head->type==empty || CDR(env->head)->type==empty |
1515 |
|
|| CDR(CDR(env->head))->type==empty) { |
1516 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
1517 |
env->err= 1; |
env->err= 1; |
1518 |
return; |
return; |
1526 |
} |
} |
1527 |
|
|
1528 |
swap(env); toss(env); |
swap(env); toss(env); |
1529 |
ifelse(env); |
sx_6966(env); |
1530 |
} |
} |
1531 |
|
|
1532 |
/* "while" */ |
/* "while" */ |
1535 |
int truth; |
int truth; |
1536 |
value *loop, *test; |
value *loop, *test; |
1537 |
|
|
1538 |
if(env->head==NULL || CDR(env->head)==NULL) { |
if(env->head->type==empty || CDR(env->head)->type==empty) { |
1539 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
1540 |
env->err= 1; |
env->err= 1; |
1541 |
return; |
return; |
1581 |
value *loop; |
value *loop; |
1582 |
int foo1, foo2; |
int foo1, foo2; |
1583 |
|
|
1584 |
if(env->head==NULL || CDR(env->head)==NULL |
if(env->head->type==empty || CDR(env->head)->type==empty |
1585 |
|| CDR(CDR(env->head))==NULL) { |
|| CDR(CDR(env->head))->type==empty) { |
1586 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
1587 |
env->err= 1; |
env->err= 1; |
1588 |
return; |
return; |
1629 |
value *loop, *foo; |
value *loop, *foo; |
1630 |
value *iterator; |
value *iterator; |
1631 |
|
|
1632 |
if(env->head==NULL || CDR(env->head)==NULL) { |
if(env->head->type==empty || CDR(env->head)->type==empty) { |
1633 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
1634 |
env->err= 1; |
env->err= 1; |
1635 |
return; |
return; |
1672 |
int ending, start, i; |
int ending, start, i; |
1673 |
value *iterator, *temp; |
value *iterator, *temp; |
1674 |
|
|
1675 |
if(env->head==NULL || CDR(env->head)==NULL) { |
if(env->head->type==empty || CDR(env->head)->type==empty) { |
1676 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
1677 |
env->err= 1; |
env->err= 1; |
1678 |
return; |
return; |
1702 |
|
|
1703 |
iterator= env->head; |
iterator= env->head; |
1704 |
|
|
1705 |
if(iterator==NULL |
if(iterator->type==empty |
1706 |
|| (CAR(iterator)->type==symb |
|| (CAR(iterator)->type==symb |
1707 |
&& CAR(iterator)->content.sym->id[0]=='[')) { |
&& CAR(iterator)->content.sym->id[0]=='[')) { |
1708 |
temp= NULL; |
temp= NULL; |
1754 |
int count= -1; |
int count= -1; |
1755 |
float ftemp; |
float ftemp; |
1756 |
static int depth= 0; |
static int depth= 0; |
1757 |
char *match, *ctemp; |
char *match; |
1758 |
size_t inlength; |
size_t inlength; |
1759 |
|
|
1760 |
if(env->in_string==NULL) { |
if(env->in_string==NULL) { |
1769 |
} |
} |
1770 |
|
|
1771 |
env->in_string= malloc(strlen(CAR(env->head)->content.ptr)+1); |
env->in_string= malloc(strlen(CAR(env->head)->content.ptr)+1); |
1772 |
|
assert(env->in_string != NULL); |
1773 |
env->free_string= env->in_string; /* Save the original pointer */ |
env->free_string= env->in_string; /* Save the original pointer */ |
1774 |
strcpy(env->in_string, CAR(env->head)->content.ptr); |
strcpy(env->in_string, CAR(env->head)->content.ptr); |
1775 |
toss(env); if(env->err) return; |
toss(env); if(env->err) return; |
1777 |
|
|
1778 |
inlength= strlen(env->in_string)+1; |
inlength= strlen(env->in_string)+1; |
1779 |
match= malloc(inlength); |
match= malloc(inlength); |
1780 |
|
assert(match != NULL); |
1781 |
|
|
1782 |
if(sscanf(env->in_string, blankform, &readlength) != EOF |
if(sscanf(env->in_string, blankform, &readlength) != EOF |
1783 |
&& readlength != -1) { |
&& readlength != -1) { |
1790 |
} else { |
} else { |
1791 |
push_float(env, ftemp); |
push_float(env, ftemp); |
1792 |
} |
} |
1793 |
|
} else if(sscanf(env->in_string, "\"\"%n", &readlength) != EOF |
1794 |
|
&& readlength != -1) { |
1795 |
|
push_cstring(env, ""); |
1796 |
} else if(sscanf(env->in_string, strform, match, &readlength) != EOF |
} else if(sscanf(env->in_string, strform, match, &readlength) != EOF |
1797 |
&& readlength != -1) { |
&& readlength != -1) { |
1798 |
push_cstring(env, match); |
push_cstring(env, match); |
1824 |
return sx_72656164(env); |
return sx_72656164(env); |
1825 |
} |
} |
1826 |
|
|
1827 |
|
#ifdef __linux__ |
1828 |
extern void beep(environment *env) |
extern void beep(environment *env) |
1829 |
{ |
{ |
1830 |
int freq, dur, period, ticks; |
int freq, dur, period, ticks; |
1831 |
|
|
1832 |
if(env->head==NULL || CDR(env->head)==NULL) { |
if(env->head->type==empty || CDR(env->head)->type==empty) { |
1833 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
1834 |
env->err= 1; |
env->err= 1; |
1835 |
return; |
return; |
1867 |
abort(); |
abort(); |
1868 |
} |
} |
1869 |
} |
} |
1870 |
|
#endif /* __linux__ */ |
1871 |
|
|
1872 |
/* "wait" */ |
/* "wait" */ |
1873 |
extern void sx_77616974(environment *env) |
extern void sx_77616974(environment *env) |
1874 |
{ |
{ |
1875 |
int dur; |
int dur; |
1876 |
|
|
1877 |
if(env->head==NULL) { |
if(env->head->type==empty) { |
1878 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
1879 |
env->err= 1; |
env->err= 1; |
1880 |
return; |
return; |
1894 |
|
|
1895 |
extern void copying(environment *env) |
extern void copying(environment *env) |
1896 |
{ |
{ |
1897 |
printf("GNU GENERAL PUBLIC LICENSE\n\ |
printf(" GNU GENERAL PUBLIC LICENSE\n\ |
1898 |
Version 2, June 1991\n\ |
Version 2, June 1991\n\ |
1899 |
\n\ |
\n\ |
1900 |
Copyright (C) 1989, 1991 Free Software Foundation, Inc.\n\ |
Copyright (C) 1989, 1991 Free Software Foundation, Inc.\n\ |
2183 |
int a, b; |
int a, b; |
2184 |
float fa, fb; |
float fa, fb; |
2185 |
|
|
2186 |
if(env->head==NULL || CDR(env->head)==NULL) { |
if(env->head->type==empty || CDR(env->head)->type==empty) { |
2187 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
2188 |
env->err= 1; |
env->err= 1; |
2189 |
return; |
return; |
2243 |
int a, b; |
int a, b; |
2244 |
float fa, fb; |
float fa, fb; |
2245 |
|
|
2246 |
if(env->head==NULL || CDR(env->head)==NULL) { |
if(env->head->type==empty || CDR(env->head)->type==empty) { |
2247 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
2248 |
env->err= 1; |
env->err= 1; |
2249 |
return; |
return; |
2302 |
{ |
{ |
2303 |
int a, b; |
int a, b; |
2304 |
|
|
2305 |
if(env->head==NULL || CDR(env->head)==NULL) { |
if(env->head->type==empty || CDR(env->head)->type==empty) { |
2306 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
2307 |
env->err= 1; |
env->err= 1; |
2308 |
return; |
return; |
2328 |
{ |
{ |
2329 |
int a, b; |
int a, b; |
2330 |
|
|
2331 |
if(env->head==NULL || CDR(env->head)==NULL) { |
if(env->head->type==empty || CDR(env->head)->type==empty) { |
2332 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
2333 |
env->err= 1; |
env->err= 1; |
2334 |
return; |
return; |
2348 |
printerr("Bad Argument Type"); |
printerr("Bad Argument Type"); |
2349 |
env->err= 2; |
env->err= 2; |
2350 |
} |
} |
2351 |
|
|
2352 |
|
extern void setcar(environment *env) |
2353 |
|
{ |
2354 |
|
if(env->head->type==empty || CDR(env->head)->type==empty) { |
2355 |
|
printerr("Too Few Arguments"); |
2356 |
|
env->err= 1; |
2357 |
|
return; |
2358 |
|
} |
2359 |
|
|
2360 |
|
if(CDR(env->head)->type!=tcons) { |
2361 |
|
printerr("Bad Argument Type"); |
2362 |
|
env->err= 2; |
2363 |
|
return; |
2364 |
|
} |
2365 |
|
|
2366 |
|
CAR(CAR(CDR(env->head)))=CAR(env->head); |
2367 |
|
toss(env); |
2368 |
|
} |
2369 |
|
|
2370 |
|
extern void setcdr(environment *env) |
2371 |
|
{ |
2372 |
|
if(env->head->type==empty || CDR(env->head)->type==empty) { |
2373 |
|
printerr("Too Few Arguments"); |
2374 |
|
env->err= 1; |
2375 |
|
return; |
2376 |
|
} |
2377 |
|
|
2378 |
|
if(CDR(env->head)->type!=tcons) { |
2379 |
|
printerr("Bad Argument Type"); |
2380 |
|
env->err= 2; |
2381 |
|
return; |
2382 |
|
} |
2383 |
|
|
2384 |
|
CDR(CAR(CDR(env->head)))=CAR(env->head); |
2385 |
|
toss(env); |
2386 |
|
} |
2387 |
|
|
2388 |
|
extern void car(environment *env) |
2389 |
|
{ |
2390 |
|
if(env->head->type==empty) { |
2391 |
|
printerr("Too Few Arguments"); |
2392 |
|
env->err= 1; |
2393 |
|
return; |
2394 |
|
} |
2395 |
|
|
2396 |
|
if(CAR(env->head)->type!=tcons) { |
2397 |
|
printerr("Bad Argument Type"); |
2398 |
|
env->err= 2; |
2399 |
|
return; |
2400 |
|
} |
2401 |
|
|
2402 |
|
CAR(env->head)=CAR(CAR(env->head)); |
2403 |
|
} |
2404 |
|
|
2405 |
|
extern void cdr(environment *env) |
2406 |
|
{ |
2407 |
|
if(env->head->type==empty) { |
2408 |
|
printerr("Too Few Arguments"); |
2409 |
|
env->err= 1; |
2410 |
|
return; |
2411 |
|
} |
2412 |
|
|
2413 |
|
if(CAR(env->head)->type!=tcons) { |
2414 |
|
printerr("Bad Argument Type"); |
2415 |
|
env->err= 2; |
2416 |
|
return; |
2417 |
|
} |
2418 |
|
|
2419 |
|
CAR(env->head)=CDR(CAR(env->head)); |
2420 |
|
} |
2421 |
|
|
2422 |
|
extern void cons(environment *env) |
2423 |
|
{ |
2424 |
|
value *val; |
2425 |
|
|
2426 |
|
if(env->head->type==empty || CDR(env->head)->type==empty) { |
2427 |
|
printerr("Too Few Arguments"); |
2428 |
|
env->err= 1; |
2429 |
|
return; |
2430 |
|
} |
2431 |
|
|
2432 |
|
val=new_val(env); |
2433 |
|
val->content.c= malloc(sizeof(pair)); |
2434 |
|
assert(val->content.c!=NULL); |
2435 |
|
|
2436 |
|
env->gc_count += sizeof(pair); |
2437 |
|
val->type=tcons; |
2438 |
|
|
2439 |
|
CAR(val)= CAR(CDR(env->head)); |
2440 |
|
CDR(val)= CAR(env->head); |
2441 |
|
|
2442 |
|
push_val(env, val); |
2443 |
|
|
2444 |
|
swap(env); if(env->err) return; |
2445 |
|
toss(env); if(env->err) return; |
2446 |
|
swap(env); if(env->err) return; |
2447 |
|
toss(env); if(env->err) return; |
2448 |
|
} |