301 |
printf("\"%s\"", (char*)stack_head->item->content.ptr); |
printf("\"%s\"", (char*)stack_head->item->content.ptr); |
302 |
break; |
break; |
303 |
case symb: |
case symb: |
304 |
printf("'%s'", ((symbol *)(stack_head->item->content.ptr))->id); |
printf("%s", ((symbol *)(stack_head->item->content.ptr))->id); |
305 |
break; |
break; |
306 |
case func: |
case func: |
307 |
printf("#<function %p>", (funcp)(stack_head->item->content.ptr)); |
printf("#<function %p>", (funcp)(stack_head->item->content.ptr)); |
308 |
break; |
break; |
309 |
case list: |
case list: |
310 |
printf("#<list %p>", (funcp)(stack_head->item->content.ptr)); |
/* A list is just a stack, so make stack_head point to it */ |
311 |
|
stack_head=(stackitem *)(stack_head->item->content.ptr); |
312 |
|
printf("[ "); |
313 |
|
while(stack_head != NULL) { |
314 |
|
print_h(stack_head); |
315 |
|
printf(" "); |
316 |
|
stack_head=stack_head->next; |
317 |
|
} |
318 |
|
printf("]"); |
319 |
break; |
break; |
320 |
default: |
default: |
321 |
printf("#<unknown %p>", (funcp)(stack_head->item->content.ptr)); |
printf("#<unknown %p>", (stack_head->item->content.ptr)); |
322 |
break; |
break; |
323 |
} |
} |
324 |
} |
} |
428 |
extern void eval(environment *env) |
extern void eval(environment *env) |
429 |
{ |
{ |
430 |
funcp in_func; |
funcp in_func; |
431 |
|
value* temp_val; |
432 |
|
stackitem* iterator; |
433 |
|
|
434 |
if(env->head==NULL) { |
if(env->head==NULL) { |
435 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
436 |
env->err=1; |
env->err=1; |
454 |
toss(env); |
toss(env); |
455 |
if(env->err) return; |
if(env->err) return; |
456 |
(*in_func)(env); |
(*in_func)(env); |
457 |
|
return; |
458 |
|
} |
459 |
|
|
460 |
|
/* If it's a list */ |
461 |
|
if(env->head->item->type==list) { |
462 |
|
temp_val= env->head->item; |
463 |
|
env->head->item->refcount++; |
464 |
|
toss(env); |
465 |
|
if(env->err) return; |
466 |
|
iterator= (stackitem*)temp_val->content.ptr; |
467 |
|
while(iterator!=NULL && iterator->item!=NULL) { |
468 |
|
push_val(&(env->head), iterator->item); |
469 |
|
if(env->head->item->type==symb |
470 |
|
&& strcmp(";", ((symbol*)(env->head->item->content.ptr))->id)==0) { |
471 |
|
toss(env); |
472 |
|
if(env->err) return; |
473 |
|
eval(env); |
474 |
|
} |
475 |
|
iterator= iterator->next; |
476 |
|
} |
477 |
|
free_val(temp_val); |
478 |
|
} |
479 |
|
} |
480 |
|
|
481 |
|
/* Reverse (flip) a list */ |
482 |
|
extern void rev(environment *env){ |
483 |
|
stackitem *old_head, *new_head, *item; |
484 |
|
|
485 |
|
if((env->head)==NULL) { |
486 |
|
printerr("Too Few Arguments"); |
487 |
|
env->err=1; |
488 |
|
return; |
489 |
|
} |
490 |
|
|
491 |
|
if(env->head->item->type!=list) { |
492 |
|
printerr("Bad Argument Type"); |
493 |
|
env->err=2; |
494 |
|
return; |
495 |
|
} |
496 |
|
|
497 |
|
old_head=(stackitem *)(env->head->item->content.ptr); |
498 |
|
new_head=NULL; |
499 |
|
while(old_head != NULL){ |
500 |
|
item=old_head; |
501 |
|
old_head=old_head->next; |
502 |
|
item->next=new_head; |
503 |
|
new_head=item; |
504 |
} |
} |
505 |
|
env->head->item->content.ptr=new_head; |
506 |
} |
} |
507 |
|
|
508 |
/* Make a list. */ |
/* Make a list. */ |
545 |
temp->item= pack; |
temp->item= pack; |
546 |
|
|
547 |
push(&(env->head), temp); |
push(&(env->head), temp); |
548 |
|
rev(env); |
549 |
} |
} |
550 |
|
|
551 |
/* Parse input. */ |
/* Parse input. */ |
561 |
rest= malloc(inlength); |
rest= malloc(inlength); |
562 |
|
|
563 |
do { |
do { |
564 |
|
/* If comment */ |
565 |
|
if((convert= sscanf(in_line, "#%[^\n\r]", rest))) { |
566 |
|
free(temp); free(rest); |
567 |
|
return; |
568 |
|
} |
569 |
|
|
570 |
/* If string */ |
/* If string */ |
571 |
if((convert= sscanf(in_line, "\"%[^\"\n\r]\" %[^\n\r]", temp, rest))) { |
if((convert= sscanf(in_line, "\"%[^\"\n\r]\" %[^\n\r]", temp, rest))) { |
572 |
push_cstring(&(env->head), temp); |
push_cstring(&(env->head), temp); |
645 |
return; |
return; |
646 |
} |
} |
647 |
|
|
648 |
|
rev(env); |
649 |
|
|
650 |
|
if(env->err) |
651 |
|
return; |
652 |
|
|
653 |
/* The first list element is the new stack head */ |
/* The first list element is the new stack head */ |
654 |
new_head= temp= env->head->item->content.ptr; |
new_head= temp= env->head->item->content.ptr; |
655 |
|
|
832 |
} |
} |
833 |
printf("okidok\n "); |
printf("okidok\n "); |
834 |
} |
} |
835 |
|
quit(&myenv); |
836 |
exit(EXIT_SUCCESS); |
return EXIT_FAILURE; |
837 |
} |
} |