| 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 |
|
|
| 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; |
int non_eval_flag; |
| 62 |
|
char *in_string; /* Input pending to be read */ |
| 63 |
} environment; |
} environment; |
| 64 |
|
|
| 65 |
/* A type for pointers to external functions */ |
/* A type for pointers to external functions */ |
| 71 |
{ |
{ |
| 72 |
int i; |
int i; |
| 73 |
|
|
| 74 |
|
env->in_string= NULL; |
| 75 |
env->err= 0; |
env->err= 0; |
| 76 |
env->non_eval_flag= 0; |
env->non_eval_flag= 0; |
| 77 |
for(i= 0; i<HASHTBLSIZE; i++) |
for(i= 0; i<HASHTBLSIZE; i++) |
| 156 |
} |
} |
| 157 |
|
|
| 158 |
/* Generic push function. */ |
/* Generic push function. */ |
| 159 |
void push(stackitem** stack_head, stackitem* in_item) |
void push(environment *env, stackitem* in_item) |
| 160 |
{ |
{ |
| 161 |
in_item->next= *stack_head; |
in_item->next= env->head; |
| 162 |
*stack_head= in_item; |
env->head= in_item; |
| 163 |
} |
} |
| 164 |
|
|
| 165 |
/* Push a value onto the stack */ |
/* Push a value onto the stack */ |
| 166 |
void push_val(stackitem **stack_head, value *val) |
void push_val(environment *env, value *val) |
| 167 |
{ |
{ |
| 168 |
stackitem *new_item= malloc(sizeof(stackitem)); |
stackitem *new_item= malloc(sizeof(stackitem)); |
| 169 |
new_item->item= val; |
new_item->item= val; |
| 170 |
val->refcount++; |
val->refcount++; |
| 171 |
push(stack_head, new_item); |
push(env, new_item); |
| 172 |
} |
} |
| 173 |
|
|
| 174 |
/* Push an integer onto the stack. */ |
/* Push an integer onto the stack. */ |
| 175 |
void push_int(stackitem **stack_head, int in_val) |
void push_int(environment *env, int in_val) |
| 176 |
{ |
{ |
| 177 |
value *new_value= malloc(sizeof(value)); |
value *new_value= malloc(sizeof(value)); |
| 178 |
stackitem *new_item= malloc(sizeof(stackitem)); |
stackitem *new_item= malloc(sizeof(stackitem)); |
| 182 |
new_value->type= integer; |
new_value->type= integer; |
| 183 |
new_value->refcount=1; |
new_value->refcount=1; |
| 184 |
|
|
| 185 |
push(stack_head, new_item); |
push(env, new_item); |
| 186 |
} |
} |
| 187 |
|
|
| 188 |
/* Copy a string onto the stack. */ |
/* Copy a string onto the stack. */ |
| 189 |
void push_cstring(stackitem **stack_head, const char *in_string) |
void push_cstring(environment *env, const char *in_string) |
| 190 |
{ |
{ |
| 191 |
value *new_value= malloc(sizeof(value)); |
value *new_value= malloc(sizeof(value)); |
| 192 |
stackitem *new_item= malloc(sizeof(stackitem)); |
stackitem *new_item= malloc(sizeof(stackitem)); |
| 197 |
new_value->type= string; |
new_value->type= string; |
| 198 |
new_value->refcount=1; |
new_value->refcount=1; |
| 199 |
|
|
| 200 |
push(stack_head, new_item); |
push(env, new_item); |
| 201 |
} |
} |
| 202 |
|
|
| 203 |
/* Mangle a symbol name to a valid C identifier name */ |
/* Mangle a symbol name to a valid C identifier name */ |
| 246 |
new_value->type= string; |
new_value->type= string; |
| 247 |
new_value->refcount=1; |
new_value->refcount=1; |
| 248 |
|
|
| 249 |
push_val(&(env->head), new_value); |
push_val(env, new_value); |
| 250 |
} |
} |
| 251 |
|
|
| 252 |
/* Push a symbol onto the stack. */ |
/* Push a symbol onto the stack. */ |
| 313 |
new_fvalue->refcount= 1; |
new_fvalue->refcount= 1; |
| 314 |
} |
} |
| 315 |
} |
} |
| 316 |
push(&(env->head), new_item); |
push(env, new_item); |
| 317 |
} |
} |
| 318 |
|
|
| 319 |
/* Print newline. */ |
/* Print newline. */ |
| 477 |
} |
} |
| 478 |
toss(env); /* toss the symbol */ |
toss(env); /* toss the symbol */ |
| 479 |
if(env->err) return; |
if(env->err) return; |
| 480 |
push_val(&(env->head), val); /* Return its bound value */ |
push_val(env, val); /* Return its bound value */ |
| 481 |
} |
} |
| 482 |
|
|
|
void stack_read(environment*, char*); |
|
|
|
|
| 483 |
/* 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 |
| 484 |
function value, and if it is, toss the symbol and execute the |
function value, and if it is, toss the symbol and execute the |
| 485 |
function. */ |
function. */ |
| 488 |
funcp in_func; |
funcp in_func; |
| 489 |
value* temp_val; |
value* temp_val; |
| 490 |
stackitem* iterator; |
stackitem* iterator; |
|
char* temp_string; |
|
| 491 |
|
|
| 492 |
if(env->head==NULL) { |
if(env->head==NULL) { |
| 493 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
| 495 |
return; |
return; |
| 496 |
} |
} |
| 497 |
|
|
| 498 |
|
eval_start: |
| 499 |
|
|
| 500 |
switch(env->head->item->type) { |
switch(env->head->item->type) { |
| 501 |
/* if it's a symbol */ |
/* if it's a symbol */ |
| 502 |
case symb: |
case symb: |
| 503 |
rcl(env); /* get its contents */ |
rcl(env); /* get its contents */ |
| 504 |
if(env->err) return; |
if(env->err) return; |
| 505 |
if(env->head->item->type!=symb){ /* don't recurse symbols */ |
if(env->head->item->type!=symb){ /* don't recurse symbols */ |
| 506 |
return eval(env); /* evaluate the value */ |
goto eval_start; |
| 507 |
} |
} |
| 508 |
return; |
return; |
| 509 |
|
|
| 522 |
if(env->err) return; |
if(env->err) return; |
| 523 |
iterator= (stackitem*)temp_val->content.ptr; |
iterator= (stackitem*)temp_val->content.ptr; |
| 524 |
while(iterator!=NULL) { |
while(iterator!=NULL) { |
| 525 |
push_val(&(env->head), iterator->item); |
push_val(env, iterator->item); |
| 526 |
if(env->head->item->type==symb |
if(env->head->item->type==symb |
| 527 |
&& strcmp(";", ((symbol*)(env->head->item->content.ptr))->id)==0) { |
&& strcmp(";", ((symbol*)(env->head->item->content.ptr))->id)==0) { |
| 528 |
toss(env); |
toss(env); |
| 529 |
if(env->err) return; |
if(env->err) return; |
| 530 |
if(iterator->next == NULL){ |
if(iterator->next == NULL){ |
| 531 |
free_val(temp_val); |
free_val(temp_val); |
| 532 |
return eval(env); |
goto eval_start; |
| 533 |
} |
} |
| 534 |
eval(env); |
eval(env); |
| 535 |
if(env->err) return; |
if(env->err) return; |
| 539 |
free_val(temp_val); |
free_val(temp_val); |
| 540 |
return; |
return; |
| 541 |
|
|
| 542 |
/* 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: |
|
| 543 |
return; |
return; |
| 544 |
} |
} |
| 545 |
} |
} |
| 574 |
/* Make a list. */ |
/* Make a list. */ |
| 575 |
extern void pack(environment *env) |
extern void pack(environment *env) |
| 576 |
{ |
{ |
|
void* delimiter; |
|
| 577 |
stackitem *iterator, *temp; |
stackitem *iterator, *temp; |
| 578 |
value *pack; |
value *pack; |
| 579 |
|
|
|
delimiter= env->head->item->content.ptr; /* Get delimiter */ |
|
|
toss(env); |
|
|
|
|
| 580 |
iterator= env->head; |
iterator= env->head; |
| 581 |
|
|
| 582 |
if(iterator==NULL || iterator->item->content.ptr==delimiter) { |
if(iterator==NULL |
| 583 |
|
|| (iterator->item->type==symb |
| 584 |
|
&& ((symbol*)(iterator->item->content.ptr))->id[0]=='[')) { |
| 585 |
temp= NULL; |
temp= NULL; |
| 586 |
toss(env); |
toss(env); |
| 587 |
} else { |
} else { |
| 588 |
/* Search for first delimiter */ |
/* Search for first delimiter */ |
| 589 |
while(iterator->next!=NULL |
while(iterator->next!=NULL |
| 590 |
&& iterator->next->item->content.ptr!=delimiter) |
&& (iterator->next->item->type!=symb |
| 591 |
|
|| ((symbol*)(iterator->next->item->content.ptr))->id[0]!='[')) |
| 592 |
iterator= iterator->next; |
iterator= iterator->next; |
| 593 |
|
|
| 594 |
/* Extract list */ |
/* Extract list */ |
| 606 |
pack->content.ptr= temp; |
pack->content.ptr= temp; |
| 607 |
pack->refcount= 1; |
pack->refcount= 1; |
| 608 |
|
|
| 609 |
temp= malloc(sizeof(stackitem)); |
push_val(env, pack); |
|
temp->item= pack; |
|
|
|
|
|
push(&(env->head), temp); |
|
| 610 |
rev(env); |
rev(env); |
| 611 |
} |
} |
| 612 |
|
|
|
/* 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); |
|
|
} |
|
|
|
|
| 613 |
/* Relocate elements of the list on the stack. */ |
/* Relocate elements of the list on the stack. */ |
| 614 |
extern void expand(environment *env) |
extern void expand(environment *env) |
| 615 |
{ |
{ |
| 666 |
result= (left==right); |
result= (left==right); |
| 667 |
|
|
| 668 |
toss(env); toss(env); |
toss(env); toss(env); |
| 669 |
push_int(&(env->head), result); |
push_int(env, result); |
| 670 |
} |
} |
| 671 |
|
|
| 672 |
/* Negates the top element on the stack. */ |
/* Negates the top element on the stack. */ |
| 688 |
|
|
| 689 |
val= env->head->item->content.val; |
val= env->head->item->content.val; |
| 690 |
toss(env); |
toss(env); |
| 691 |
push_int(&(env->head), !val); |
push_int(env, !val); |
| 692 |
} |
} |
| 693 |
|
|
| 694 |
/* 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 |
| 794 |
|
|
| 795 |
/* Returns the current error number to the stack */ |
/* Returns the current error number to the stack */ |
| 796 |
extern void errn(environment *env){ |
extern void errn(environment *env){ |
| 797 |
push_int(&(env->head), env->err); |
push_int(env, env->err); |
| 798 |
} |
} |
| 799 |
|
|
| 800 |
|
extern void read(environment*); |
| 801 |
|
|
| 802 |
int main() |
int main() |
| 803 |
{ |
{ |
| 804 |
environment myenv; |
environment myenv; |
|
char in_string[100]; |
|
| 805 |
|
|
| 806 |
init_env(&myenv); |
init_env(&myenv); |
| 807 |
|
|
| 808 |
printf("okidok\n "); |
while(1) { |
| 809 |
|
if(myenv.in_string==NULL) |
| 810 |
while(fgets(in_string, 100, stdin) != NULL) { |
printstack(&myenv); |
| 811 |
stack_read(&myenv, in_string); |
read(&myenv); |
| 812 |
if(myenv.err) { |
if(myenv.err) { |
| 813 |
printf("(error %d) ", myenv.err); |
printf("(error %d) ", myenv.err); |
| 814 |
myenv.err=0; |
myenv.err=0; |
| 815 |
|
} else if(myenv.head!=NULL |
| 816 |
|
&& myenv.head->item->type==symb |
| 817 |
|
&& ((symbol*)(myenv.head->item->content.ptr))->id[0]==';') { |
| 818 |
|
toss(&myenv); /* No error check in main */ |
| 819 |
|
eval(&myenv); |
| 820 |
} |
} |
|
printf("okidok\n "); |
|
| 821 |
} |
} |
| 822 |
quit(&myenv); |
quit(&myenv); |
| 823 |
return EXIT_FAILURE; |
return EXIT_FAILURE; |
| 849 |
strcpy(new_string, b_val->content.ptr); |
strcpy(new_string, b_val->content.ptr); |
| 850 |
strcat(new_string, a_val->content.ptr); |
strcat(new_string, a_val->content.ptr); |
| 851 |
free_val(a_val); free_val(b_val); |
free_val(a_val); free_val(b_val); |
| 852 |
push_cstring(&(env->head), new_string); |
push_cstring(env, new_string); |
| 853 |
free(new_string); |
free(new_string); |
| 854 |
return; |
return; |
| 855 |
} |
} |
| 863 |
a=env->head->item->content.val; |
a=env->head->item->content.val; |
| 864 |
toss(env); |
toss(env); |
| 865 |
if(env->err) return; |
if(env->err) return; |
| 866 |
b=env->head->item->content.val; |
if(env->head->item->refcount == 1) |
| 867 |
toss(env); |
env->head->item->content.val += a; |
| 868 |
if(env->err) return; |
else { |
| 869 |
push_int(&(env->head), a+b); |
b=env->head->item->content.val; |
| 870 |
|
toss(env); |
| 871 |
|
if(env->err) return; |
| 872 |
|
push_int(env, a+b); |
| 873 |
|
} |
| 874 |
} |
} |
| 875 |
|
|
| 876 |
/* - */ |
/* - */ |
| 877 |
extern void sx_2d(environment *env) { |
extern void sx_2d(environment *env) { |
| 878 |
int a; |
int a, b; |
| 879 |
|
|
| 880 |
if((env->head)==NULL || env->head->next==NULL) { |
if((env->head)==NULL || env->head->next==NULL) { |
| 881 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
| 892 |
a=env->head->item->content.val; |
a=env->head->item->content.val; |
| 893 |
toss(env); |
toss(env); |
| 894 |
if(env->err) return; |
if(env->err) return; |
| 895 |
env->head->item->content.val -= a; |
if(env->head->item->refcount == 1) |
| 896 |
|
env->head->item->content.val -= a; |
| 897 |
|
else { |
| 898 |
|
b=env->head->item->content.val; |
| 899 |
|
toss(env); |
| 900 |
|
if(env->err) return; |
| 901 |
|
push_int(env, b-a); |
| 902 |
|
} |
| 903 |
} |
} |
| 904 |
|
|
| 905 |
/* > */ |
/* > */ |
| 906 |
extern void sx_3e(environment *env) { |
extern void sx_3e(environment *env) { |
| 907 |
int a; |
int a, b; |
| 908 |
|
|
| 909 |
if((env->head)==NULL || env->head->next==NULL) { |
if((env->head)==NULL || env->head->next==NULL) { |
| 910 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
| 921 |
a=env->head->item->content.val; |
a=env->head->item->content.val; |
| 922 |
toss(env); |
toss(env); |
| 923 |
if(env->err) return; |
if(env->err) return; |
| 924 |
env->head->item->content.val = (env->head->item->content.val > a); |
if(env->head->item->refcount == 1) |
| 925 |
|
env->head->item->content.val = (env->head->item->content.val > a); |
| 926 |
|
else { |
| 927 |
|
b=env->head->item->content.val; |
| 928 |
|
toss(env); |
| 929 |
|
if(env->err) return; |
| 930 |
|
push_int(env, b>a); |
| 931 |
|
} |
| 932 |
} |
} |
| 933 |
|
|
| 934 |
/* Return copy of a value */ |
/* Return copy of a value */ |
| 983 |
env->err=1; |
env->err=1; |
| 984 |
return; |
return; |
| 985 |
} |
} |
| 986 |
push_val(&(env->head), copy_val(env->head->item)); |
push_val(env, copy_val(env->head->item)); |
| 987 |
} |
} |
| 988 |
|
|
| 989 |
/* "if", If-Then */ |
/* "if", If-Then */ |
| 1057 |
extern void sx_7768696c65(environment *env) { |
extern void sx_7768696c65(environment *env) { |
| 1058 |
|
|
| 1059 |
int truth; |
int truth; |
| 1060 |
|
value *loop, *test; |
| 1061 |
|
|
| 1062 |
if((env->head)==NULL || env->head->next==NULL) { |
if((env->head)==NULL || env->head->next==NULL) { |
| 1063 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
| 1065 |
return; |
return; |
| 1066 |
} |
} |
| 1067 |
|
|
| 1068 |
|
loop= env->head->item; |
| 1069 |
|
loop->refcount++; |
| 1070 |
|
toss(env); if(env->err) return; |
| 1071 |
|
|
| 1072 |
|
test= env->head->item; |
| 1073 |
|
test->refcount++; |
| 1074 |
|
toss(env); if(env->err) return; |
| 1075 |
|
|
| 1076 |
do { |
do { |
| 1077 |
swap(env); if(env->err) return; |
push_val(env, test); |
| 1078 |
dup(env); if(env->err) return; |
eval(env); |
|
eval(env); if(env->err) return; |
|
| 1079 |
|
|
| 1080 |
if(env->head->item->type != integer) { |
if(env->head->item->type != integer) { |
| 1081 |
printerr("Bad Argument Type"); |
printerr("Bad Argument Type"); |
| 1084 |
} |
} |
| 1085 |
|
|
| 1086 |
truth= env->head->item->content.val; |
truth= env->head->item->content.val; |
|
|
|
| 1087 |
toss(env); if(env->err) return; |
toss(env); if(env->err) return; |
|
swap(env); if(env->err) return; |
|
| 1088 |
|
|
| 1089 |
if(truth) { |
if(truth) { |
| 1090 |
dup(env); |
push_val(env, loop); |
| 1091 |
eval(env); |
eval(env); |
| 1092 |
} else { |
} else { |
| 1093 |
toss(env); |
toss(env); |
|
toss(env); |
|
| 1094 |
} |
} |
| 1095 |
|
|
| 1096 |
} while(truth); |
} while(truth); |
| 1097 |
|
|
| 1098 |
|
free_val(test); |
| 1099 |
|
free_val(loop); |
| 1100 |
|
} |
| 1101 |
|
|
| 1102 |
|
/* For-loop */ |
| 1103 |
|
extern void sx_666f72(environment *env) { |
| 1104 |
|
|
| 1105 |
|
value *loop, *foo; |
| 1106 |
|
stackitem *iterator; |
| 1107 |
|
|
| 1108 |
|
if((env->head)==NULL || env->head->next==NULL) { |
| 1109 |
|
printerr("Too Few Arguments"); |
| 1110 |
|
env->err=1; |
| 1111 |
|
return; |
| 1112 |
|
} |
| 1113 |
|
|
| 1114 |
|
if(env->head->next->item->type != list) { |
| 1115 |
|
printerr("Bad Argument Type"); |
| 1116 |
|
env->err=2; |
| 1117 |
|
return; |
| 1118 |
|
} |
| 1119 |
|
|
| 1120 |
|
loop= env->head->item; |
| 1121 |
|
loop->refcount++; |
| 1122 |
|
toss(env); if(env->err) return; |
| 1123 |
|
|
| 1124 |
|
foo= env->head->item; |
| 1125 |
|
foo->refcount++; |
| 1126 |
|
toss(env); if(env->err) return; |
| 1127 |
|
|
| 1128 |
|
iterator= foo->content.ptr; |
| 1129 |
|
|
| 1130 |
|
while(iterator!=NULL) { |
| 1131 |
|
push_val(env, iterator->item); |
| 1132 |
|
push_val(env, loop); |
| 1133 |
|
eval(env); if(env->err) return; |
| 1134 |
|
iterator= iterator->next; |
| 1135 |
|
} |
| 1136 |
|
|
| 1137 |
|
free_val(loop); |
| 1138 |
|
free_val(foo); |
| 1139 |
|
} |
| 1140 |
|
|
| 1141 |
|
/* 'to' */ |
| 1142 |
|
extern void to(environment *env) { |
| 1143 |
|
int i, start, ending; |
| 1144 |
|
stackitem *temp_head; |
| 1145 |
|
value *temp_val; |
| 1146 |
|
|
| 1147 |
|
if((env->head)==NULL || env->head->next==NULL) { |
| 1148 |
|
printerr("Too Few Arguments"); |
| 1149 |
|
env->err=1; |
| 1150 |
|
return; |
| 1151 |
|
} |
| 1152 |
|
|
| 1153 |
|
if(env->head->item->type!=integer |
| 1154 |
|
|| env->head->next->item->type!=integer) { |
| 1155 |
|
printerr("Bad Argument Type"); |
| 1156 |
|
env->err=2; |
| 1157 |
|
return; |
| 1158 |
|
} |
| 1159 |
|
|
| 1160 |
|
ending= env->head->item->content.val; |
| 1161 |
|
toss(env); if(env->err) return; |
| 1162 |
|
start= env->head->item->content.val; |
| 1163 |
|
toss(env); if(env->err) return; |
| 1164 |
|
|
| 1165 |
|
temp_head= env->head; |
| 1166 |
|
env->head= NULL; |
| 1167 |
|
|
| 1168 |
|
if(ending>=start) { |
| 1169 |
|
for(i= ending; i>=start; i--) |
| 1170 |
|
push_int(env, i); |
| 1171 |
|
} else { |
| 1172 |
|
for(i= ending; i<=start; i++) |
| 1173 |
|
push_int(env, i); |
| 1174 |
|
} |
| 1175 |
|
|
| 1176 |
|
temp_val= malloc(sizeof(value)); |
| 1177 |
|
temp_val->content.ptr= env->head; |
| 1178 |
|
temp_val->refcount= 1; |
| 1179 |
|
temp_val->type= list; |
| 1180 |
|
env->head= temp_head; |
| 1181 |
|
push_val(env, temp_val); |
| 1182 |
|
} |
| 1183 |
|
|
| 1184 |
|
/* Read a string */ |
| 1185 |
|
extern void readline(environment *env) { |
| 1186 |
|
char in_string[101]; |
| 1187 |
|
|
| 1188 |
|
fgets(in_string, 100, stdin); |
| 1189 |
|
push_cstring(env, in_string); |
| 1190 |
|
} |
| 1191 |
|
|
| 1192 |
|
/* Read a value and place on stack */ |
| 1193 |
|
extern void read(environment *env) { |
| 1194 |
|
const char symbform[]= "%[a-zA-Z0-9!$%*+./:<=>?@^_~-]%[\001-\377]"; |
| 1195 |
|
const char strform[]= "\"%[^\"]\"%[\001-\377]"; |
| 1196 |
|
const char intform[]= "%i%[\001-\377]"; |
| 1197 |
|
const char blankform[]= "%*[ \t]%[\001-\377]"; |
| 1198 |
|
const char ebrackform[]= "%*1[]]%[\001-\377]"; |
| 1199 |
|
const char semicform[]= "%*1[;]%[\001-\377]"; |
| 1200 |
|
const char bbrackform[]= "%*1[[]%[\001-\377]"; |
| 1201 |
|
|
| 1202 |
|
int itemp; |
| 1203 |
|
static int depth= 0; |
| 1204 |
|
char *rest, *match; |
| 1205 |
|
size_t inlength; |
| 1206 |
|
|
| 1207 |
|
if(env->in_string==NULL) { |
| 1208 |
|
readline(env); if(env->err) return; |
| 1209 |
|
|
| 1210 |
|
env->in_string= malloc(strlen(env->head->item->content.ptr)+1); |
| 1211 |
|
strcpy(env->in_string, env->head->item->content.ptr); |
| 1212 |
|
toss(env); if(env->err) return; |
| 1213 |
|
} |
| 1214 |
|
|
| 1215 |
|
inlength= strlen(env->in_string)+1; |
| 1216 |
|
match= malloc(inlength); |
| 1217 |
|
rest= malloc(inlength); |
| 1218 |
|
|
| 1219 |
|
if(sscanf(env->in_string, blankform, rest)) { |
| 1220 |
|
; |
| 1221 |
|
} else if(sscanf(env->in_string, intform, &itemp, rest) > 0) { |
| 1222 |
|
push_int(env, itemp); |
| 1223 |
|
} else if(sscanf(env->in_string, strform, match, rest) > 0) { |
| 1224 |
|
push_cstring(env, match); |
| 1225 |
|
} else if(sscanf(env->in_string, symbform, match, rest) > 0) { |
| 1226 |
|
push_sym(env, match); |
| 1227 |
|
} else if(sscanf(env->in_string, ebrackform, rest) > 0) { |
| 1228 |
|
pack(env); if(env->err) return; |
| 1229 |
|
if(depth!=0) depth--; |
| 1230 |
|
} else if(sscanf(env->in_string, semicform, rest) > 0) { |
| 1231 |
|
push_sym(env, ";"); |
| 1232 |
|
} else if(sscanf(env->in_string, bbrackform, rest) > 0) { |
| 1233 |
|
push_sym(env, "["); |
| 1234 |
|
depth++; |
| 1235 |
|
} else { |
| 1236 |
|
free(rest); |
| 1237 |
|
rest= NULL; |
| 1238 |
|
} |
| 1239 |
|
|
| 1240 |
|
free(env->in_string); |
| 1241 |
|
free(match); |
| 1242 |
|
|
| 1243 |
|
env->in_string= rest; |
| 1244 |
|
|
| 1245 |
|
if(depth) |
| 1246 |
|
return read(env); |
| 1247 |
} |
} |