9 |
/* strcmp, strcpy, strlen, strcat, strdup */ |
/* strcmp, strcpy, strlen, strcat, strdup */ |
10 |
#include <string.h> |
#include <string.h> |
11 |
|
|
12 |
#define HASHTBLSIZE 65536 |
#define HASHTBLSIZE 2048 |
13 |
|
|
14 |
/* First, define some types. */ |
/* First, define some types. */ |
15 |
|
|
58 |
stackitem *head; /* Head of the stack */ |
stackitem *head; /* Head of the stack */ |
59 |
hashtbl symbols; /* Hash table of all variable bindings */ |
hashtbl symbols; /* Hash table of all variable bindings */ |
60 |
int err; /* Error flag */ |
int err; /* Error flag */ |
61 |
int non_eval_flag; |
char *in_string; /* Input pending to be read */ |
62 |
|
char *free_string; /* Free this string when all input is |
63 |
|
read from in_string */ |
64 |
} environment; |
} environment; |
65 |
|
|
66 |
/* A type for pointers to external functions */ |
/* A type for pointers to external functions */ |
72 |
{ |
{ |
73 |
int i; |
int i; |
74 |
|
|
75 |
|
env->in_string= NULL; |
76 |
env->err= 0; |
env->err= 0; |
|
env->non_eval_flag= 0; |
|
77 |
for(i= 0; i<HASHTBLSIZE; i++) |
for(i= 0; i<HASHTBLSIZE; i++) |
78 |
env->symbols[i]= NULL; |
env->symbols[i]= NULL; |
79 |
} |
} |
100 |
free(item); /* free the stackitem */ |
free(item); /* free the stackitem */ |
101 |
item=temp; /* go to next stackitem */ |
item=temp; /* go to next stackitem */ |
102 |
} |
} |
|
free(val); /* Free the actual list value */ |
|
103 |
break; |
break; |
104 |
case integer: |
case integer: |
105 |
case func: |
case func: |
106 |
case symb: |
case symb: |
107 |
break; |
break; |
108 |
} |
} |
109 |
|
if(val->id!=NULL) |
110 |
|
free(val->id); |
111 |
|
free(val); /* Free the actual list value */ |
112 |
} |
} |
113 |
} |
} |
114 |
|
|
157 |
} |
} |
158 |
} |
} |
159 |
|
|
|
/* Generic push function. */ |
|
|
void push(stackitem** stack_head, stackitem* in_item) |
|
|
{ |
|
|
in_item->next= *stack_head; |
|
|
*stack_head= in_item; |
|
|
} |
|
|
|
|
160 |
/* Push a value onto the stack */ |
/* Push a value onto the stack */ |
161 |
void push_val(stackitem **stack_head, value *val) |
void push_val(environment *env, value *val) |
162 |
{ |
{ |
163 |
stackitem *new_item= malloc(sizeof(stackitem)); |
stackitem *new_item= malloc(sizeof(stackitem)); |
164 |
new_item->item= val; |
new_item->item= val; |
165 |
val->refcount++; |
val->refcount++; |
166 |
push(stack_head, new_item); |
new_item->next= env->head; |
167 |
|
env->head= new_item; |
168 |
} |
} |
169 |
|
|
170 |
/* Push an integer onto the stack. */ |
/* Push an integer onto the stack. */ |
171 |
void push_int(stackitem **stack_head, int in_val) |
void push_int(environment *env, int in_val) |
172 |
{ |
{ |
173 |
value *new_value= malloc(sizeof(value)); |
value *new_value= malloc(sizeof(value)); |
|
stackitem *new_item= malloc(sizeof(stackitem)); |
|
|
new_item->item= new_value; |
|
174 |
|
|
175 |
new_value->content.val= in_val; |
new_value->content.val= in_val; |
176 |
new_value->type= integer; |
new_value->type= integer; |
177 |
new_value->refcount=1; |
new_value->refcount= 1; |
178 |
|
new_value->id= NULL; |
179 |
|
|
180 |
push(stack_head, new_item); |
push_val(env, new_value); |
181 |
} |
} |
182 |
|
|
183 |
/* Copy a string onto the stack. */ |
/* Copy a string onto the stack. */ |
184 |
void push_cstring(stackitem **stack_head, const char *in_string) |
void push_cstring(environment *env, const char *in_string) |
185 |
{ |
{ |
186 |
value *new_value= malloc(sizeof(value)); |
value *new_value= malloc(sizeof(value)); |
|
stackitem *new_item= malloc(sizeof(stackitem)); |
|
|
new_item->item=new_value; |
|
187 |
|
|
188 |
new_value->content.ptr= malloc(strlen(in_string)+1); |
new_value->content.ptr= malloc(strlen(in_string)+1); |
189 |
strcpy(new_value->content.ptr, in_string); |
strcpy(new_value->content.ptr, in_string); |
190 |
new_value->type= string; |
new_value->type= string; |
191 |
new_value->refcount=1; |
new_value->refcount= 1; |
192 |
|
new_value->id= NULL; |
193 |
|
|
194 |
push(stack_head, new_item); |
push_val(env, new_value); |
195 |
} |
} |
196 |
|
|
197 |
/* Mangle a symbol name to a valid C identifier name */ |
/* Mangle a symbol name to a valid C identifier name */ |
215 |
} |
} |
216 |
|
|
217 |
extern void mangle(environment *env){ |
extern void mangle(environment *env){ |
|
value *new_value; |
|
218 |
char *new_string; |
char *new_string; |
219 |
|
|
220 |
if((env->head)==NULL) { |
if((env->head)==NULL) { |
234 |
toss(env); |
toss(env); |
235 |
if(env->err) return; |
if(env->err) return; |
236 |
|
|
237 |
new_value= malloc(sizeof(value)); |
push_cstring(env, new_string); |
|
new_value->content.ptr= new_string; |
|
|
new_value->type= string; |
|
|
new_value->refcount=1; |
|
|
|
|
|
push_val(&(env->head), new_value); |
|
238 |
} |
} |
239 |
|
|
240 |
/* Push a symbol onto the stack. */ |
/* Push a symbol onto the stack. */ |
241 |
void push_sym(environment *env, const char *in_string) |
void push_sym(environment *env, const char *in_string) |
242 |
{ |
{ |
|
stackitem *new_item; /* The new stack item */ |
|
|
/* ...which will contain... */ |
|
243 |
value *new_value; /* A new symbol value */ |
value *new_value; /* A new symbol value */ |
244 |
/* ...which might point to... */ |
/* ...which might point to... */ |
245 |
symbol **new_symbol; /* (if needed) A new actual symbol */ |
symbol **new_symbol; /* (if needed) A new actual symbol */ |
252 |
const char *dlerr; /* Dynamic linker error */ |
const char *dlerr; /* Dynamic linker error */ |
253 |
char *mangled; /* Mangled function name */ |
char *mangled; /* Mangled function name */ |
254 |
|
|
|
/* Create a new stack item containing a new value */ |
|
|
new_item= malloc(sizeof(stackitem)); |
|
255 |
new_value= malloc(sizeof(value)); |
new_value= malloc(sizeof(value)); |
|
new_item->item=new_value; |
|
256 |
|
|
257 |
/* The new value is a symbol */ |
/* The new value is a symbol */ |
258 |
new_value->type= symb; |
new_value->type= symb; |
296 |
new_fvalue->refcount= 1; |
new_fvalue->refcount= 1; |
297 |
} |
} |
298 |
} |
} |
299 |
push(&(env->head), new_item); |
push_val(env, new_value); |
300 |
} |
} |
301 |
|
|
302 |
/* Print newline. */ |
/* Print newline. */ |
336 |
} |
} |
337 |
|
|
338 |
/* Prints the top element of the stack. */ |
/* Prints the top element of the stack. */ |
339 |
void print_h(stackitem *stack_head) |
void print_h(stackitem *stack_head, int noquote) |
340 |
{ |
{ |
341 |
switch(stack_head->item->type) { |
switch(stack_head->item->type) { |
342 |
case integer: |
case integer: |
343 |
printf("%d", stack_head->item->content.val); |
printf("%d", stack_head->item->content.val); |
344 |
break; |
break; |
345 |
case string: |
case string: |
346 |
printf("%s", (char*)stack_head->item->content.ptr); |
if(noquote) |
347 |
|
printf("%s", (char*)stack_head->item->content.ptr); |
348 |
|
else |
349 |
|
printf("\"%s\"", (char*)stack_head->item->content.ptr); |
350 |
break; |
break; |
351 |
case symb: |
case symb: |
352 |
printf("%s", ((symbol *)(stack_head->item->content.ptr))->id); |
printf("%s", ((symbol *)(stack_head->item->content.ptr))->id); |
359 |
stack_head=(stackitem *)(stack_head->item->content.ptr); |
stack_head=(stackitem *)(stack_head->item->content.ptr); |
360 |
printf("[ "); |
printf("[ "); |
361 |
while(stack_head != NULL) { |
while(stack_head != NULL) { |
362 |
print_h(stack_head); |
print_h(stack_head, noquote); |
363 |
printf(" "); |
printf(" "); |
364 |
stack_head=stack_head->next; |
stack_head=stack_head->next; |
365 |
} |
} |
374 |
env->err=1; |
env->err=1; |
375 |
return; |
return; |
376 |
} |
} |
377 |
print_h(env->head); |
print_h(env->head, 0); |
378 |
|
nl(); |
379 |
} |
} |
380 |
|
|
381 |
/* Prints the top element of the stack and then discards it. */ |
/* Prints the top element of the stack and then discards it. */ |
386 |
toss(env); |
toss(env); |
387 |
} |
} |
388 |
|
|
389 |
|
extern void princ_(environment *env) { |
390 |
|
if(env->head==NULL) { |
391 |
|
printerr("Too Few Arguments"); |
392 |
|
env->err=1; |
393 |
|
return; |
394 |
|
} |
395 |
|
print_h(env->head, 1); |
396 |
|
} |
397 |
|
|
398 |
|
/* Prints the top element of the stack and then discards it. */ |
399 |
|
extern void princ(environment *env) |
400 |
|
{ |
401 |
|
princ_(env); |
402 |
|
if(env->err) return; |
403 |
|
toss(env); |
404 |
|
} |
405 |
|
|
406 |
/* Only to be called by function printstack. */ |
/* Only to be called by function printstack. */ |
407 |
void print_st(stackitem *stack_head, long counter) |
void print_st(stackitem *stack_head, long counter) |
408 |
{ |
{ |
409 |
if(stack_head->next != NULL) |
if(stack_head->next != NULL) |
410 |
print_st(stack_head->next, counter+1); |
print_st(stack_head->next, counter+1); |
411 |
printf("%ld: ", counter); |
printf("%ld: ", counter); |
412 |
print_h(stack_head); |
print_h(stack_head, 0); |
413 |
nl(); |
nl(); |
414 |
} |
} |
415 |
|
|
417 |
extern void printstack(environment *env) |
extern void printstack(environment *env) |
418 |
{ |
{ |
419 |
if(env->head == NULL) { |
if(env->head == NULL) { |
420 |
|
printf("Stack Empty\n"); |
421 |
return; |
return; |
422 |
} |
} |
423 |
print_st(env->head, 1); |
print_st(env->head, 1); |
|
nl(); |
|
424 |
} |
} |
425 |
|
|
426 |
/* Swap the two top elements on the stack. */ |
/* Swap the two top elements on the stack. */ |
481 |
} |
} |
482 |
toss(env); /* toss the symbol */ |
toss(env); /* toss the symbol */ |
483 |
if(env->err) return; |
if(env->err) return; |
484 |
push_val(&(env->head), val); /* Return its bound value */ |
push_val(env, val); /* Return its bound value */ |
485 |
} |
} |
486 |
|
|
|
void stack_read(environment*, char*); |
|
|
|
|
487 |
/* 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 |
488 |
function value, and if it is, toss the symbol and execute the |
function value, and if it is, toss the symbol and execute the |
489 |
function. */ |
function. */ |
492 |
funcp in_func; |
funcp in_func; |
493 |
value* temp_val; |
value* temp_val; |
494 |
stackitem* iterator; |
stackitem* iterator; |
495 |
char* temp_string; |
|
496 |
|
eval_start: |
497 |
|
|
498 |
if(env->head==NULL) { |
if(env->head==NULL) { |
499 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
507 |
rcl(env); /* get its contents */ |
rcl(env); /* get its contents */ |
508 |
if(env->err) return; |
if(env->err) return; |
509 |
if(env->head->item->type!=symb){ /* don't recurse symbols */ |
if(env->head->item->type!=symb){ /* don't recurse symbols */ |
510 |
return eval(env); /* evaluate the value */ |
goto eval_start; |
511 |
} |
} |
512 |
return; |
return; |
513 |
|
|
526 |
if(env->err) return; |
if(env->err) return; |
527 |
iterator= (stackitem*)temp_val->content.ptr; |
iterator= (stackitem*)temp_val->content.ptr; |
528 |
while(iterator!=NULL) { |
while(iterator!=NULL) { |
529 |
push_val(&(env->head), iterator->item); |
push_val(env, iterator->item); |
530 |
if(env->head->item->type==symb |
if(env->head->item->type==symb |
531 |
&& strcmp(";", ((symbol*)(env->head->item->content.ptr))->id)==0) { |
&& strcmp(";", ((symbol*)(env->head->item->content.ptr))->id)==0) { |
532 |
toss(env); |
toss(env); |
533 |
if(env->err) return; |
if(env->err) return; |
534 |
if(iterator->next == NULL){ |
if(iterator->next == NULL){ |
535 |
free_val(temp_val); |
free_val(temp_val); |
536 |
return eval(env); |
goto eval_start; |
537 |
} |
} |
538 |
eval(env); |
eval(env); |
539 |
if(env->err) return; |
if(env->err) return; |
543 |
free_val(temp_val); |
free_val(temp_val); |
544 |
return; |
return; |
545 |
|
|
546 |
/* If it's a string */ |
default: |
|
case string: |
|
|
temp_val= env->head->item; |
|
|
env->head->item->refcount++; |
|
|
toss(env); |
|
|
if(env->err) return; |
|
|
temp_string= malloc(strlen((char*)temp_val->content.ptr)+5); |
|
|
strcpy(temp_string, "[ "); |
|
|
strcpy(temp_string+2, (char*)temp_val->content.ptr); |
|
|
free_val(temp_val); |
|
|
strcat(temp_string, " ]"); |
|
|
stack_read(env, temp_string); |
|
|
free(temp_string); |
|
|
return eval(env); |
|
|
|
|
|
case integer: |
|
547 |
return; |
return; |
548 |
} |
} |
549 |
} |
} |
578 |
/* Make a list. */ |
/* Make a list. */ |
579 |
extern void pack(environment *env) |
extern void pack(environment *env) |
580 |
{ |
{ |
|
void* delimiter; |
|
581 |
stackitem *iterator, *temp; |
stackitem *iterator, *temp; |
582 |
value *pack; |
value *pack; |
583 |
|
|
|
delimiter= env->head->item->content.ptr; /* Get delimiter */ |
|
|
toss(env); |
|
|
|
|
584 |
iterator= env->head; |
iterator= env->head; |
585 |
|
|
586 |
if(iterator==NULL || iterator->item->content.ptr==delimiter) { |
if(iterator==NULL |
587 |
|
|| (iterator->item->type==symb |
588 |
|
&& ((symbol*)(iterator->item->content.ptr))->id[0]=='[')) { |
589 |
temp= NULL; |
temp= NULL; |
590 |
toss(env); |
toss(env); |
591 |
} else { |
} else { |
592 |
/* Search for first delimiter */ |
/* Search for first delimiter */ |
593 |
while(iterator->next!=NULL |
while(iterator->next!=NULL |
594 |
&& iterator->next->item->content.ptr!=delimiter) |
&& (iterator->next->item->type!=symb |
595 |
|
|| ((symbol*)(iterator->next->item->content.ptr))->id[0]!='[')) |
596 |
iterator= iterator->next; |
iterator= iterator->next; |
597 |
|
|
598 |
/* Extract list */ |
/* Extract list */ |
610 |
pack->content.ptr= temp; |
pack->content.ptr= temp; |
611 |
pack->refcount= 1; |
pack->refcount= 1; |
612 |
|
|
613 |
temp= malloc(sizeof(stackitem)); |
push_val(env, pack); |
|
temp->item= pack; |
|
|
|
|
|
push(&(env->head), temp); |
|
614 |
rev(env); |
rev(env); |
615 |
} |
} |
616 |
|
|
|
/* Parse input. */ |
|
|
void stack_read(environment *env, char *in_line) |
|
|
{ |
|
|
char *temp, *rest; |
|
|
int itemp; |
|
|
size_t inlength= strlen(in_line)+1; |
|
|
int convert= 0; |
|
|
|
|
|
temp= malloc(inlength); |
|
|
rest= malloc(inlength); |
|
|
|
|
|
do { |
|
|
/* If comment */ |
|
|
if((convert= sscanf(in_line, "#%[^\n\r]", rest))) { |
|
|
free(temp); free(rest); |
|
|
return; |
|
|
} |
|
|
|
|
|
/* If string */ |
|
|
if((convert= sscanf(in_line, "\"%[^\"\n\r]\" %[^\n\r]", temp, rest))) { |
|
|
push_cstring(&(env->head), temp); |
|
|
break; |
|
|
} |
|
|
/* If integer */ |
|
|
if((convert= sscanf(in_line, "%d %[^\n\r]", &itemp, rest))) { |
|
|
push_int(&(env->head), itemp); |
|
|
break; |
|
|
} |
|
|
/* Escape ';' with '\' */ |
|
|
if((convert= sscanf(in_line, "\\%c%[^\n\r]", temp, rest))) { |
|
|
temp[1]= '\0'; |
|
|
push_sym(env, temp); |
|
|
break; |
|
|
} |
|
|
/* If symbol */ |
|
|
if((convert= sscanf(in_line, "%[^][ ;\n\r]%[^\n\r]", temp, rest))) { |
|
|
push_sym(env, temp); |
|
|
break; |
|
|
} |
|
|
/* If single char */ |
|
|
if((convert= sscanf(in_line, "%c%[^\n\r]", temp, rest))) { |
|
|
if(*temp==';') { |
|
|
if(!env->non_eval_flag) { |
|
|
eval(env); /* Evaluate top element */ |
|
|
break; |
|
|
} |
|
|
|
|
|
push_sym(env, ";"); |
|
|
break; |
|
|
} |
|
|
|
|
|
if(*temp==']') { |
|
|
push_sym(env, "["); |
|
|
pack(env); |
|
|
if(env->non_eval_flag) |
|
|
env->non_eval_flag--; |
|
|
break; |
|
|
} |
|
|
|
|
|
if(*temp=='[') { |
|
|
push_sym(env, "["); |
|
|
env->non_eval_flag++; |
|
|
break; |
|
|
} |
|
|
} |
|
|
} while(0); |
|
|
|
|
|
free(temp); |
|
|
|
|
|
if(convert<2) { |
|
|
free(rest); |
|
|
return; |
|
|
} |
|
|
|
|
|
stack_read(env, rest); |
|
|
|
|
|
free(rest); |
|
|
} |
|
|
|
|
617 |
/* Relocate elements of the list on the stack. */ |
/* Relocate elements of the list on the stack. */ |
618 |
extern void expand(environment *env) |
extern void expand(environment *env) |
619 |
{ |
{ |
670 |
result= (left==right); |
result= (left==right); |
671 |
|
|
672 |
toss(env); toss(env); |
toss(env); toss(env); |
673 |
push_int(&(env->head), result); |
push_int(env, result); |
674 |
} |
} |
675 |
|
|
676 |
/* Negates the top element on the stack. */ |
/* Negates the top element on the stack. */ |
692 |
|
|
693 |
val= env->head->item->content.val; |
val= env->head->item->content.val; |
694 |
toss(env); |
toss(env); |
695 |
push_int(&(env->head), !val); |
push_int(env, !val); |
696 |
} |
} |
697 |
|
|
698 |
/* Compares the two top elements on the stack and return 0 if they're the |
/* Compares the two top elements on the stack and return 0 if they're the |
735 |
toss(env); toss(env); |
toss(env); toss(env); |
736 |
} |
} |
737 |
|
|
738 |
|
extern void clear(environment *); |
739 |
|
void forget_sym(symbol **); |
740 |
|
|
741 |
/* Quit stack. */ |
/* Quit stack. */ |
742 |
extern void quit(environment *env) |
extern void quit(environment *env) |
743 |
{ |
{ |
744 |
|
long i; |
745 |
|
|
746 |
|
clear(env); |
747 |
|
if (env->err) return; |
748 |
|
for(i= 0; i<HASHTBLSIZE; i++) { |
749 |
|
while(env->symbols[i]!= NULL) { |
750 |
|
forget_sym(&(env->symbols[i])); |
751 |
|
} |
752 |
|
env->symbols[i]= NULL; |
753 |
|
} |
754 |
exit(EXIT_SUCCESS); |
exit(EXIT_SUCCESS); |
755 |
} |
} |
756 |
|
|
776 |
} |
} |
777 |
} |
} |
778 |
|
|
779 |
|
/* Internal forget function */ |
780 |
|
void forget_sym(symbol **hash_entry) { |
781 |
|
symbol *temp; |
782 |
|
|
783 |
|
temp= *hash_entry; |
784 |
|
*hash_entry= (*hash_entry)->next; |
785 |
|
|
786 |
|
if(temp->val!=NULL) { |
787 |
|
free_val(temp->val); |
788 |
|
} |
789 |
|
free(temp->id); |
790 |
|
free(temp); |
791 |
|
} |
792 |
|
|
793 |
/* Forgets a symbol (remove it from the hash table) */ |
/* Forgets a symbol (remove it from the hash table) */ |
794 |
extern void forget(environment *env) |
extern void forget(environment *env) |
795 |
{ |
{ |
796 |
char* sym_id; |
char* sym_id; |
797 |
stackitem *stack_head= env->head; |
stackitem *stack_head= env->head; |
|
symbol **hash_entry, *temp; |
|
798 |
|
|
799 |
if(stack_head==NULL) { |
if(stack_head==NULL) { |
800 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
811 |
sym_id= ((symbol*)(stack_head->item->content.ptr))->id; |
sym_id= ((symbol*)(stack_head->item->content.ptr))->id; |
812 |
toss(env); |
toss(env); |
813 |
|
|
814 |
hash_entry= hash(env->symbols, sym_id); |
return forget_sym(hash(env->symbols, sym_id)); |
|
temp= *hash_entry; |
|
|
*hash_entry= (*hash_entry)->next; |
|
|
|
|
|
if(temp->val!=NULL) { |
|
|
free_val(temp->val); |
|
|
} |
|
|
free(temp->id); |
|
|
free(temp); |
|
815 |
} |
} |
816 |
|
|
817 |
/* Returns the current error number to the stack */ |
/* Returns the current error number to the stack */ |
818 |
extern void errn(environment *env){ |
extern void errn(environment *env){ |
819 |
push_int(&(env->head), env->err); |
push_int(env, env->err); |
820 |
} |
} |
821 |
|
|
822 |
|
extern void read(environment*); |
823 |
|
|
824 |
int main() |
int main() |
825 |
{ |
{ |
826 |
environment myenv; |
environment myenv; |
|
char in_string[100]; |
|
827 |
|
|
828 |
init_env(&myenv); |
init_env(&myenv); |
829 |
|
|
830 |
printf("okidok\n "); |
while(1) { |
831 |
|
if(myenv.in_string==NULL) { |
832 |
while(fgets(in_string, 100, stdin) != NULL) { |
nl(); |
833 |
stack_read(&myenv, in_string); |
printstack(&myenv); |
834 |
|
printf("> "); |
835 |
|
} |
836 |
|
read(&myenv); |
837 |
if(myenv.err) { |
if(myenv.err) { |
838 |
printf("(error %d) ", myenv.err); |
printf("(error %d) ", myenv.err); |
839 |
myenv.err=0; |
myenv.err=0; |
840 |
|
} else if(myenv.head!=NULL |
841 |
|
&& myenv.head->item->type==symb |
842 |
|
&& ((symbol*)(myenv.head->item->content.ptr))->id[0]==';') { |
843 |
|
toss(&myenv); /* No error check in main */ |
844 |
|
eval(&myenv); |
845 |
} |
} |
|
printf("okidok\n "); |
|
846 |
} |
} |
847 |
quit(&myenv); |
quit(&myenv); |
848 |
return EXIT_FAILURE; |
return EXIT_FAILURE; |
874 |
strcpy(new_string, b_val->content.ptr); |
strcpy(new_string, b_val->content.ptr); |
875 |
strcat(new_string, a_val->content.ptr); |
strcat(new_string, a_val->content.ptr); |
876 |
free_val(a_val); free_val(b_val); |
free_val(a_val); free_val(b_val); |
877 |
push_cstring(&(env->head), new_string); |
push_cstring(env, new_string); |
878 |
free(new_string); |
free(new_string); |
879 |
return; |
return; |
880 |
} |
} |
888 |
a=env->head->item->content.val; |
a=env->head->item->content.val; |
889 |
toss(env); |
toss(env); |
890 |
if(env->err) return; |
if(env->err) return; |
891 |
b=env->head->item->content.val; |
if(env->head->item->refcount == 1) |
892 |
toss(env); |
env->head->item->content.val += a; |
893 |
if(env->err) return; |
else { |
894 |
push_int(&(env->head), a+b); |
b=env->head->item->content.val; |
895 |
|
toss(env); |
896 |
|
if(env->err) return; |
897 |
|
push_int(env, a+b); |
898 |
|
} |
899 |
} |
} |
900 |
|
|
901 |
/* - */ |
/* - */ |
902 |
extern void sx_2d(environment *env) { |
extern void sx_2d(environment *env) { |
903 |
int a; |
int a, b; |
904 |
|
|
905 |
if((env->head)==NULL || env->head->next==NULL) { |
if((env->head)==NULL || env->head->next==NULL) { |
906 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
917 |
a=env->head->item->content.val; |
a=env->head->item->content.val; |
918 |
toss(env); |
toss(env); |
919 |
if(env->err) return; |
if(env->err) return; |
920 |
env->head->item->content.val -= a; |
if(env->head->item->refcount == 1) |
921 |
|
env->head->item->content.val -= a; |
922 |
|
else { |
923 |
|
b=env->head->item->content.val; |
924 |
|
toss(env); |
925 |
|
if(env->err) return; |
926 |
|
push_int(env, b-a); |
927 |
|
} |
928 |
|
} |
929 |
|
|
930 |
|
/* > */ |
931 |
|
extern void sx_3e(environment *env) { |
932 |
|
int a, b; |
933 |
|
|
934 |
|
if((env->head)==NULL || env->head->next==NULL) { |
935 |
|
printerr("Too Few Arguments"); |
936 |
|
env->err=1; |
937 |
|
return; |
938 |
|
} |
939 |
|
|
940 |
|
if(env->head->item->type!=integer |
941 |
|
|| env->head->next->item->type!=integer) { |
942 |
|
printerr("Bad Argument Type"); |
943 |
|
env->err=2; |
944 |
|
return; |
945 |
|
} |
946 |
|
a=env->head->item->content.val; |
947 |
|
toss(env); |
948 |
|
if(env->err) return; |
949 |
|
if(env->head->item->refcount == 1) |
950 |
|
env->head->item->content.val = (env->head->item->content.val > a); |
951 |
|
else { |
952 |
|
b=env->head->item->content.val; |
953 |
|
toss(env); |
954 |
|
if(env->err) return; |
955 |
|
push_int(env, b>a); |
956 |
|
} |
957 |
} |
} |
958 |
|
|
959 |
/* Return copy of a value */ |
/* Return copy of a value */ |
1008 |
env->err=1; |
env->err=1; |
1009 |
return; |
return; |
1010 |
} |
} |
1011 |
push_val(&(env->head), copy_val(env->head->item)); |
push_val(env, copy_val(env->head->item)); |
1012 |
} |
} |
1013 |
|
|
1014 |
/* "if", If-Then */ |
/* "if", If-Then */ |
1082 |
extern void sx_7768696c65(environment *env) { |
extern void sx_7768696c65(environment *env) { |
1083 |
|
|
1084 |
int truth; |
int truth; |
1085 |
|
value *loop, *test; |
1086 |
|
|
1087 |
if((env->head)==NULL || env->head->next==NULL) { |
if((env->head)==NULL || env->head->next==NULL) { |
1088 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
1090 |
return; |
return; |
1091 |
} |
} |
1092 |
|
|
1093 |
|
loop= env->head->item; |
1094 |
|
loop->refcount++; |
1095 |
|
toss(env); if(env->err) return; |
1096 |
|
|
1097 |
|
test= env->head->item; |
1098 |
|
test->refcount++; |
1099 |
|
toss(env); if(env->err) return; |
1100 |
|
|
1101 |
do { |
do { |
1102 |
swap(env); if(env->err) return; |
push_val(env, test); |
1103 |
dup(env); if(env->err) return; |
eval(env); |
|
eval(env); if(env->err) return; |
|
1104 |
|
|
1105 |
if(env->head->item->type != integer) { |
if(env->head->item->type != integer) { |
1106 |
printerr("Bad Argument Type"); |
printerr("Bad Argument Type"); |
1109 |
} |
} |
1110 |
|
|
1111 |
truth= env->head->item->content.val; |
truth= env->head->item->content.val; |
|
|
|
1112 |
toss(env); if(env->err) return; |
toss(env); if(env->err) return; |
|
swap(env); if(env->err) return; |
|
1113 |
|
|
1114 |
if(truth) { |
if(truth) { |
1115 |
dup(env); |
push_val(env, loop); |
1116 |
eval(env); |
eval(env); |
1117 |
} else { |
} else { |
1118 |
toss(env); |
toss(env); |
|
toss(env); |
|
1119 |
} |
} |
1120 |
|
|
1121 |
} while(truth); |
} while(truth); |
1122 |
|
|
1123 |
|
free_val(test); |
1124 |
|
free_val(loop); |
1125 |
|
} |
1126 |
|
|
1127 |
|
/* For-loop */ |
1128 |
|
extern void sx_666f72(environment *env) { |
1129 |
|
|
1130 |
|
value *loop, *foo; |
1131 |
|
stackitem *iterator; |
1132 |
|
|
1133 |
|
if((env->head)==NULL || env->head->next==NULL) { |
1134 |
|
printerr("Too Few Arguments"); |
1135 |
|
env->err=1; |
1136 |
|
return; |
1137 |
|
} |
1138 |
|
|
1139 |
|
if(env->head->next->item->type != list) { |
1140 |
|
printerr("Bad Argument Type"); |
1141 |
|
env->err=2; |
1142 |
|
return; |
1143 |
|
} |
1144 |
|
|
1145 |
|
loop= env->head->item; |
1146 |
|
loop->refcount++; |
1147 |
|
toss(env); if(env->err) return; |
1148 |
|
|
1149 |
|
foo= env->head->item; |
1150 |
|
foo->refcount++; |
1151 |
|
toss(env); if(env->err) return; |
1152 |
|
|
1153 |
|
iterator= foo->content.ptr; |
1154 |
|
|
1155 |
|
while(iterator!=NULL) { |
1156 |
|
push_val(env, iterator->item); |
1157 |
|
push_val(env, loop); |
1158 |
|
eval(env); if(env->err) return; |
1159 |
|
iterator= iterator->next; |
1160 |
|
} |
1161 |
|
|
1162 |
|
free_val(loop); |
1163 |
|
free_val(foo); |
1164 |
|
} |
1165 |
|
|
1166 |
|
/* 'to' */ |
1167 |
|
extern void to(environment *env) { |
1168 |
|
int i, start, ending; |
1169 |
|
stackitem *temp_head; |
1170 |
|
value *temp_val; |
1171 |
|
|
1172 |
|
if((env->head)==NULL || env->head->next==NULL) { |
1173 |
|
printerr("Too Few Arguments"); |
1174 |
|
env->err=1; |
1175 |
|
return; |
1176 |
|
} |
1177 |
|
|
1178 |
|
if(env->head->item->type!=integer |
1179 |
|
|| env->head->next->item->type!=integer) { |
1180 |
|
printerr("Bad Argument Type"); |
1181 |
|
env->err=2; |
1182 |
|
return; |
1183 |
|
} |
1184 |
|
|
1185 |
|
ending= env->head->item->content.val; |
1186 |
|
toss(env); if(env->err) return; |
1187 |
|
start= env->head->item->content.val; |
1188 |
|
toss(env); if(env->err) return; |
1189 |
|
|
1190 |
|
temp_head= env->head; |
1191 |
|
env->head= NULL; |
1192 |
|
|
1193 |
|
if(ending>=start) { |
1194 |
|
for(i= ending; i>=start; i--) |
1195 |
|
push_int(env, i); |
1196 |
|
} else { |
1197 |
|
for(i= ending; i<=start; i++) |
1198 |
|
push_int(env, i); |
1199 |
|
} |
1200 |
|
|
1201 |
|
temp_val= malloc(sizeof(value)); |
1202 |
|
temp_val->content.ptr= env->head; |
1203 |
|
temp_val->refcount= 1; |
1204 |
|
temp_val->type= list; |
1205 |
|
env->head= temp_head; |
1206 |
|
push_val(env, temp_val); |
1207 |
|
} |
1208 |
|
|
1209 |
|
/* Read a string */ |
1210 |
|
extern void readline(environment *env) { |
1211 |
|
char in_string[101]; |
1212 |
|
|
1213 |
|
fgets(in_string, 100, stdin); |
1214 |
|
push_cstring(env, in_string); |
1215 |
|
} |
1216 |
|
|
1217 |
|
/* Read a value and place on stack */ |
1218 |
|
extern void read(environment *env) { |
1219 |
|
const char symbform[]= "%[a-zA-Z0-9!$%*+./:<=>?@^_~-]%n"; |
1220 |
|
const char strform[]= "\"%[^\"]\"%n"; |
1221 |
|
const char intform[]= "%i%n"; |
1222 |
|
const char blankform[]= "%*[ \t]%n"; |
1223 |
|
const char ebrackform[]= "%*1[]]%n"; |
1224 |
|
const char semicform[]= "%*1[;]%n"; |
1225 |
|
const char bbrackform[]= "%*1[[]%n"; |
1226 |
|
|
1227 |
|
int itemp, readlength= -1; |
1228 |
|
static int depth= 0; |
1229 |
|
char *rest, *match; |
1230 |
|
size_t inlength; |
1231 |
|
|
1232 |
|
if(env->in_string==NULL) { |
1233 |
|
if(depth > 0) { |
1234 |
|
printf("]> "); |
1235 |
|
} |
1236 |
|
readline(env); if(env->err) return; |
1237 |
|
|
1238 |
|
env->in_string= malloc(strlen(env->head->item->content.ptr)+1); |
1239 |
|
env->free_string= env->in_string; /* Save the original pointer */ |
1240 |
|
strcpy(env->in_string, env->head->item->content.ptr); |
1241 |
|
toss(env); if(env->err) return; |
1242 |
|
} |
1243 |
|
|
1244 |
|
inlength= strlen(env->in_string)+1; |
1245 |
|
match= malloc(inlength); |
1246 |
|
rest= malloc(inlength); |
1247 |
|
|
1248 |
|
if(sscanf(env->in_string, blankform, &readlength)!=EOF |
1249 |
|
&& readlength != -1) { |
1250 |
|
; |
1251 |
|
} else if(sscanf(env->in_string, intform, &itemp, &readlength) != EOF |
1252 |
|
&& readlength != -1) { |
1253 |
|
push_int(env, itemp); |
1254 |
|
} else if(sscanf(env->in_string, strform, match, &readlength) != EOF |
1255 |
|
&& readlength != -1) { |
1256 |
|
push_cstring(env, match); |
1257 |
|
} else if(sscanf(env->in_string, symbform, match, &readlength) != EOF |
1258 |
|
&& readlength != -1) { |
1259 |
|
push_sym(env, match); |
1260 |
|
} else if(sscanf(env->in_string, ebrackform, &readlength) != EOF |
1261 |
|
&& readlength != -1) { |
1262 |
|
pack(env); if(env->err) return; |
1263 |
|
if(depth != 0) depth--; |
1264 |
|
} else if(sscanf(env->in_string, semicform, &readlength) != EOF |
1265 |
|
&& readlength != -1) { |
1266 |
|
push_sym(env, ";"); |
1267 |
|
} else if(sscanf(env->in_string, bbrackform, &readlength) != EOF |
1268 |
|
&& readlength != -1) { |
1269 |
|
push_sym(env, "["); |
1270 |
|
depth++; |
1271 |
|
} else { |
1272 |
|
free(env->free_string); |
1273 |
|
env->in_string = env->free_string = NULL; |
1274 |
|
free(match); |
1275 |
|
} |
1276 |
|
if ( env->in_string != NULL) { |
1277 |
|
env->in_string += readlength; |
1278 |
|
} |
1279 |
|
|
1280 |
|
if(depth) |
1281 |
|
return read(env); |
1282 |
} |
} |