165 |
extern void gc_init(environment *env) |
extern void gc_init(environment *env) |
166 |
{ |
{ |
167 |
stackitem *new_head= NULL, *titem; |
stackitem *new_head= NULL, *titem; |
168 |
cons *iterator; |
pair *iterator; |
169 |
symbol *tsymb; |
symbol *tsymb; |
170 |
int i; |
int i; |
171 |
|
|
285 |
{ |
{ |
286 |
value *new_value= new_val(env); |
value *new_value= new_val(env); |
287 |
|
|
288 |
new_value->content.c= malloc(sizeof(cons)); |
new_value->content.c= malloc(sizeof(pair)); |
289 |
assert(new_value->content.c!=NULL); |
assert(new_value->content.c!=NULL); |
290 |
new_value->type= tcons; |
new_value->type= tcons; |
291 |
CAR(new_value)= val; |
CAR(new_value)= val; |
1332 |
break; |
break; |
1333 |
case tcons: |
case tcons: |
1334 |
|
|
1335 |
new_value->content.c= malloc(sizeof(cons)); |
new_value->content.c= malloc(sizeof(pair)); |
1336 |
assert(new_value->content.c!=NULL); |
assert(new_value->content.c!=NULL); |
1337 |
|
|
1338 |
CAR(new_value)= copy_val(env, CAR(old_value)); /* recurse */ |
CAR(new_value)= copy_val(env, CAR(old_value)); /* recurse */ |
2353 |
|
|
2354 |
CAR(env->head)=CDR(CAR(env->head)); |
CAR(env->head)=CDR(CAR(env->head)); |
2355 |
} |
} |
2356 |
|
|
2357 |
|
extern void cons(environment *env) |
2358 |
|
{ |
2359 |
|
value *val; |
2360 |
|
|
2361 |
|
if(env->head->type==empty || CDR(env->head)->type==empty) { |
2362 |
|
printerr("Too Few Arguments"); |
2363 |
|
env->err= 1; |
2364 |
|
return; |
2365 |
|
} |
2366 |
|
|
2367 |
|
val=new_val(env); |
2368 |
|
val->content.c= malloc(sizeof(pair)); |
2369 |
|
assert(val->content.c!=NULL); |
2370 |
|
val->type=tcons; |
2371 |
|
|
2372 |
|
CAR(val)= CAR(CDR(env->head)); |
2373 |
|
CDR(val)= CAR(env->head); |
2374 |
|
|
2375 |
|
push_val(env, val); |
2376 |
|
|
2377 |
|
swap(env); if(env->err) return; |
2378 |
|
toss(env); if(env->err) return; |
2379 |
|
swap(env); if(env->err) return; |
2380 |
|
toss(env); if(env->err) return; |
2381 |
|
} |