| 160 |
else |
else |
| 161 |
def_sym(in_hash, in_string); /* Make symbol */ |
def_sym(in_hash, in_string); /* Make symbol */ |
| 162 |
|
|
| 163 |
new_item->content.ptr= *hash(in_hash, in_string); /* XXX */ |
new_item->content.ptr= *hash(in_hash, in_string); /* The new reference |
| 164 |
|
shouldn't point at |
| 165 |
|
NULL */ |
| 166 |
new_item->type= ref; |
new_item->type= ref; |
| 167 |
} |
} |
| 168 |
|
|
| 198 |
} |
} |
| 199 |
|
|
| 200 |
/* Prints the top element of the stack. */ |
/* Prints the top element of the stack. */ |
| 201 |
void print_(stackitem** stack_head) |
extern void print_(stackitem** stack_head) |
| 202 |
{ |
{ |
| 203 |
if((*stack_head)==NULL) { |
stackitem* temp= *stack_head; |
| 204 |
|
|
| 205 |
|
if(temp==NULL) { |
| 206 |
printerr("Stack empty"); |
printerr("Stack empty"); |
| 207 |
return; |
return; |
| 208 |
} |
} |
| 209 |
|
|
| 210 |
switch((*stack_head)->type) { |
while(temp->type==ref) |
| 211 |
|
temp= temp->content.ptr; |
| 212 |
|
|
| 213 |
|
switch(temp->type) { |
| 214 |
case value: |
case value: |
| 215 |
printf("%d", (*stack_head)->content.val); |
printf("%d", temp->content.val); |
| 216 |
break; |
break; |
| 217 |
case string: |
case string: |
| 218 |
printf("%s", (char*)(*stack_head)->content.ptr); |
printf("\"%s\"", (char*)temp->content.ptr); |
|
break; |
|
|
case ref: |
|
|
printf("%s", ((stackitem*)(*stack_head)->content.ptr)->id); |
|
| 219 |
break; |
break; |
| 220 |
case symbol: |
case symbol: |
| 221 |
|
printf("%s", temp->id); |
| 222 |
|
break; |
| 223 |
default: |
default: |
| 224 |
printf("%p", (*stack_head)->content.ptr); |
printf("%p", temp->content.ptr); |
| 225 |
break; |
break; |
| 226 |
} |
} |
| 227 |
} |
} |
| 249 |
{ |
{ |
| 250 |
if(*stack_head != NULL) { |
if(*stack_head != NULL) { |
| 251 |
print_st(*stack_head, 1); |
print_st(*stack_head, 1); |
| 252 |
printf("\n"); |
nl(); |
| 253 |
} else { |
} else { |
| 254 |
printerr("Stack empty"); |
printerr("Stack empty"); |
| 255 |
} |
} |
| 260 |
extern void eval(stackitem** stack_head) |
extern void eval(stackitem** stack_head) |
| 261 |
{ |
{ |
| 262 |
funcp in_func; |
funcp in_func; |
| 263 |
|
stackitem* temp= *stack_head; |
| 264 |
|
|
| 265 |
if((*stack_head)==NULL || (*stack_head)->type!=ref) { |
if(temp==NULL) { |
| 266 |
printerr("Stack empty or not a reference"); |
printerr("Stack empty"); |
| 267 |
return; |
return; |
| 268 |
} |
} |
| 269 |
|
|
| 270 |
if(((stackitem*)(*stack_head)->content.ptr)->type==func) { |
while(temp->type==ref) |
| 271 |
in_func= (funcp)((stackitem*)(*stack_head)->content.ptr)->content.ptr; |
temp= temp->content.ptr; |
| 272 |
|
|
| 273 |
|
if(temp->type==func) { |
| 274 |
|
in_func= (funcp)(temp->content.ptr); |
| 275 |
toss(stack_head); |
toss(stack_head); |
| 276 |
(*in_func)(stack_head); |
(*in_func)(stack_head); |
| 277 |
return; |
return; |
| 278 |
} else |
} |
| 279 |
printerr("Not a function"); |
|
| 280 |
|
printerr("Couldn't evaluate"); |
| 281 |
|
} |
| 282 |
|
|
| 283 |
|
/* Make a list. */ |
| 284 |
|
extern void pack(stackitem** stack_head) |
| 285 |
|
{ |
| 286 |
|
void* delimiter; |
| 287 |
|
stackitem *iterator, *temp, *pack; |
| 288 |
|
|
| 289 |
|
delimiter= (*stack_head)->content.ptr; /* Get delimiter */ |
| 290 |
|
toss(stack_head); |
| 291 |
|
|
| 292 |
|
iterator= *stack_head; |
| 293 |
|
|
| 294 |
|
if(iterator==NULL || iterator->content.ptr==delimiter) { |
| 295 |
|
temp= NULL; |
| 296 |
|
toss(stack_head); |
| 297 |
|
} else { |
| 298 |
|
/* Search for first delimiter */ |
| 299 |
|
while(iterator->next!=NULL && iterator->next->content.ptr!=delimiter) |
| 300 |
|
iterator= iterator->next; |
| 301 |
|
|
| 302 |
|
/* Extract list */ |
| 303 |
|
temp= *stack_head; |
| 304 |
|
*stack_head= iterator->next; |
| 305 |
|
iterator->next= NULL; |
| 306 |
|
|
| 307 |
|
if(*stack_head!=NULL && (*stack_head)->content.ptr==delimiter) |
| 308 |
|
toss(stack_head); |
| 309 |
|
} |
| 310 |
|
|
| 311 |
|
/* Push list */ |
| 312 |
|
pack= malloc(sizeof(stackitem)); |
| 313 |
|
pack->type= list; |
| 314 |
|
pack->content.ptr= temp; |
| 315 |
|
|
| 316 |
|
push(stack_head, pack); |
| 317 |
} |
} |
| 318 |
|
|
| 319 |
/* Parse input. */ |
/* Parse input. */ |
| 323 |
int itemp; |
int itemp; |
| 324 |
size_t inlength= strlen(in_line)+1; |
size_t inlength= strlen(in_line)+1; |
| 325 |
int convert= 0; |
int convert= 0; |
| 326 |
|
static int non_eval_flag= 0; |
| 327 |
|
|
| 328 |
temp= malloc(inlength); |
temp= malloc(inlength); |
| 329 |
rest= malloc(inlength); |
rest= malloc(inlength); |
| 346 |
break; |
break; |
| 347 |
} |
} |
| 348 |
/* If symbol */ |
/* If symbol */ |
| 349 |
if((convert= sscanf(in_line, "%[^ ;\n\r]%[^\n\r]", temp, rest))) { |
if((convert= sscanf(in_line, "%[^][ ;\n\r]%[^\n\r]", temp, rest))) { |
| 350 |
push_ref(stack_head, in_hash, temp); |
push_ref(stack_head, in_hash, temp); |
| 351 |
break; |
break; |
| 352 |
} |
} |
| 353 |
/* If ';' */ |
/* If single char */ |
| 354 |
if((convert= sscanf(in_line, "%c%[^\n\r]", temp, rest)) && *temp==';') { |
if((convert= sscanf(in_line, "%c%[^\n\r]", temp, rest))) { |
| 355 |
eval(stack_head); /* Evaluate top element */ |
if(*temp==';') { |
| 356 |
break; |
if(!non_eval_flag) { |
| 357 |
|
eval(stack_head); /* Evaluate top element */ |
| 358 |
|
break; |
| 359 |
|
} |
| 360 |
|
|
| 361 |
|
push_ref(stack_head, in_hash, ";"); |
| 362 |
|
break; |
| 363 |
|
} |
| 364 |
|
|
| 365 |
|
if(*temp==']') { |
| 366 |
|
push_ref(stack_head, in_hash, "["); |
| 367 |
|
pack(stack_head); |
| 368 |
|
if(non_eval_flag!=0) |
| 369 |
|
non_eval_flag--; |
| 370 |
|
break; |
| 371 |
|
} |
| 372 |
|
|
| 373 |
|
if(*temp=='[') { |
| 374 |
|
push_ref(stack_head, in_hash, "["); |
| 375 |
|
non_eval_flag++; |
| 376 |
|
break; |
| 377 |
|
} |
| 378 |
} |
} |
| 379 |
} while(0); |
} while(0); |
| 380 |
|
|
| 392 |
return 1; |
return 1; |
| 393 |
} |
} |
| 394 |
|
|
|
/* Make a list. */ |
|
|
extern void pack(stackitem** stack_head) |
|
|
{ |
|
|
void* delimiter; |
|
|
stackitem *iterator, *temp, *pack; |
|
|
|
|
|
if((*stack_head)==NULL) { |
|
|
printerr("Stack empty"); |
|
|
return; |
|
|
} |
|
|
|
|
|
delimiter= (*stack_head)->content.ptr; /* Get delimiter */ |
|
|
toss(stack_head); |
|
|
|
|
|
iterator= *stack_head; |
|
|
|
|
|
/* Search for first delimiter */ |
|
|
while(iterator->next!=NULL && iterator->next->content.ptr!=delimiter) |
|
|
iterator= iterator->next; |
|
|
|
|
|
/* Extract list */ |
|
|
temp= *stack_head; |
|
|
*stack_head= iterator->next; |
|
|
iterator->next= NULL; |
|
|
|
|
|
if(*stack_head!=NULL && (*stack_head)->content.ptr==delimiter) |
|
|
toss(stack_head); |
|
|
|
|
|
/* Push list */ |
|
|
pack= malloc(sizeof(stackitem)); |
|
|
pack->type= list; |
|
|
pack->content.ptr= temp; |
|
|
|
|
|
push(stack_head, pack); |
|
|
} |
|
|
|
|
| 395 |
/* Relocate elements of the list on the stack. */ |
/* Relocate elements of the list on the stack. */ |
| 396 |
extern void expand(stackitem** stack_head) |
extern void expand(stackitem** stack_head) |
| 397 |
{ |
{ |
| 407 |
new_head= temp= (*stack_head)->content.ptr; |
new_head= temp= (*stack_head)->content.ptr; |
| 408 |
toss(stack_head); |
toss(stack_head); |
| 409 |
|
|
| 410 |
|
if(temp==NULL) |
| 411 |
|
return; |
| 412 |
|
|
| 413 |
/* Search the end of the list */ |
/* Search the end of the list */ |
| 414 |
while(temp->next!=NULL) |
while(temp->next!=NULL) |
| 415 |
temp= temp->next; |
temp= temp->next; |
| 506 |
exit(EXIT_SUCCESS); |
exit(EXIT_SUCCESS); |
| 507 |
} |
} |
| 508 |
|
|
| 509 |
|
/* Clear stack */ |
| 510 |
|
extern void clear(stackitem** stack_head) |
| 511 |
|
{ |
| 512 |
|
while(*stack_head!=NULL) |
| 513 |
|
toss(stack_head); |
| 514 |
|
} |
| 515 |
|
|
| 516 |
int main() |
int main() |
| 517 |
{ |
{ |
| 518 |
stackitem* s= NULL; |
stackitem* s= NULL; |