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 |
|
|
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"); |
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); |
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); |
|
|
goto eval_start; |
|
|
|
|
|
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 */ |
609 |
temp= malloc(sizeof(stackitem)); |
temp= malloc(sizeof(stackitem)); |
610 |
temp->item= pack; |
temp->item= pack; |
611 |
|
|
612 |
push(&(env->head), temp); |
push(env, temp); |
613 |
rev(env); |
rev(env); |
614 |
} |
} |
615 |
|
|
|
/* 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); |
|
|
} |
|
|
|
|
616 |
/* Relocate elements of the list on the stack. */ |
/* Relocate elements of the list on the stack. */ |
617 |
extern void expand(environment *env) |
extern void expand(environment *env) |
618 |
{ |
{ |
669 |
result= (left==right); |
result= (left==right); |
670 |
|
|
671 |
toss(env); toss(env); |
toss(env); toss(env); |
672 |
push_int(&(env->head), result); |
push_int(env, result); |
673 |
} |
} |
674 |
|
|
675 |
/* Negates the top element on the stack. */ |
/* Negates the top element on the stack. */ |
691 |
|
|
692 |
val= env->head->item->content.val; |
val= env->head->item->content.val; |
693 |
toss(env); |
toss(env); |
694 |
push_int(&(env->head), !val); |
push_int(env, !val); |
695 |
} |
} |
696 |
|
|
697 |
/* 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 |
797 |
|
|
798 |
/* Returns the current error number to the stack */ |
/* Returns the current error number to the stack */ |
799 |
extern void errn(environment *env){ |
extern void errn(environment *env){ |
800 |
push_int(&(env->head), env->err); |
push_int(env, env->err); |
801 |
} |
} |
802 |
|
|
803 |
extern void read(environment*); |
extern void read(environment*); |
810 |
|
|
811 |
while(1) { |
while(1) { |
812 |
if(myenv.in_string==NULL) |
if(myenv.in_string==NULL) |
813 |
printf("okidok\n "); |
printstack(&myenv); |
814 |
read(&myenv); |
read(&myenv); |
815 |
if(myenv.err) { |
if(myenv.err) { |
816 |
printf("(error %d) ", myenv.err); |
printf("(error %d) ", myenv.err); |
817 |
myenv.err=0; |
myenv.err=0; |
818 |
} else if(myenv.head->item->type==symb |
} else if(myenv.head!=NULL |
819 |
|
&& myenv.head->item->type==symb |
820 |
&& ((symbol*)(myenv.head->item->content.ptr))->id[0]==';') { |
&& ((symbol*)(myenv.head->item->content.ptr))->id[0]==';') { |
821 |
toss(&myenv); /* No error check in main */ |
toss(&myenv); /* No error check in main */ |
822 |
eval(&myenv); |
eval(&myenv); |
852 |
strcpy(new_string, b_val->content.ptr); |
strcpy(new_string, b_val->content.ptr); |
853 |
strcat(new_string, a_val->content.ptr); |
strcat(new_string, a_val->content.ptr); |
854 |
free_val(a_val); free_val(b_val); |
free_val(a_val); free_val(b_val); |
855 |
push_cstring(&(env->head), new_string); |
push_cstring(env, new_string); |
856 |
free(new_string); |
free(new_string); |
857 |
return; |
return; |
858 |
} |
} |
872 |
b=env->head->item->content.val; |
b=env->head->item->content.val; |
873 |
toss(env); |
toss(env); |
874 |
if(env->err) return; |
if(env->err) return; |
875 |
push_int(&(env->head), a+b); |
push_int(env, a+b); |
876 |
} |
} |
877 |
} |
} |
878 |
|
|
901 |
b=env->head->item->content.val; |
b=env->head->item->content.val; |
902 |
toss(env); |
toss(env); |
903 |
if(env->err) return; |
if(env->err) return; |
904 |
push_int(&(env->head), b-a); |
push_int(env, b-a); |
905 |
} |
} |
906 |
} |
} |
907 |
|
|
930 |
b=env->head->item->content.val; |
b=env->head->item->content.val; |
931 |
toss(env); |
toss(env); |
932 |
if(env->err) return; |
if(env->err) return; |
933 |
push_int(&(env->head), b>a); |
push_int(env, b>a); |
934 |
} |
} |
935 |
} |
} |
936 |
|
|
986 |
env->err=1; |
env->err=1; |
987 |
return; |
return; |
988 |
} |
} |
989 |
push_val(&(env->head), copy_val(env->head->item)); |
push_val(env, copy_val(env->head->item)); |
990 |
} |
} |
991 |
|
|
992 |
/* "if", If-Then */ |
/* "if", If-Then */ |
1077 |
toss(env); if(env->err) return; |
toss(env); if(env->err) return; |
1078 |
|
|
1079 |
do { |
do { |
1080 |
push_val(&(env->head), test); |
push_val(env, test); |
1081 |
eval(env); |
eval(env); |
1082 |
|
|
1083 |
if(env->head->item->type != integer) { |
if(env->head->item->type != integer) { |
1090 |
toss(env); if(env->err) return; |
toss(env); if(env->err) return; |
1091 |
|
|
1092 |
if(truth) { |
if(truth) { |
1093 |
push_val(&(env->head), loop); |
push_val(env, loop); |
1094 |
eval(env); |
eval(env); |
1095 |
} else { |
} else { |
1096 |
toss(env); |
toss(env); |
1131 |
iterator= foo->content.ptr; |
iterator= foo->content.ptr; |
1132 |
|
|
1133 |
while(iterator!=NULL) { |
while(iterator!=NULL) { |
1134 |
push_val(&(env->head), iterator->item); |
push_val(env, iterator->item); |
1135 |
push_val(&(env->head), loop); |
push_val(env, loop); |
1136 |
eval(env); if(env->err) return; |
eval(env); if(env->err) return; |
1137 |
iterator= iterator->next; |
iterator= iterator->next; |
1138 |
} |
} |
1167 |
|
|
1168 |
if(ending>=start) { |
if(ending>=start) { |
1169 |
for(i= start; i<=ending; i++) |
for(i= start; i<=ending; i++) |
1170 |
push_int(&(env->head), i); |
push_int(env, i); |
1171 |
} else { |
} else { |
1172 |
for(i= start; i>=ending; i--) |
for(i= start; i>=ending; i--) |
1173 |
push_int(&(env->head), i); |
push_int(env, i); |
1174 |
} |
} |
1175 |
|
|
|
push_sym(env, "["); |
|
1176 |
pack(env); if(env->err) return; |
pack(env); if(env->err) return; |
1177 |
} |
} |
1178 |
|
|
1181 |
char in_string[101]; |
char in_string[101]; |
1182 |
|
|
1183 |
fgets(in_string, 100, stdin); |
fgets(in_string, 100, stdin); |
1184 |
push_cstring(&(env->head), in_string); |
push_cstring(env, in_string); |
1185 |
} |
} |
1186 |
|
|
1187 |
/* Read a value and place on stack */ |
/* Read a value and place on stack */ |
1188 |
extern void read(environment *env) { |
extern void read(environment *env) { |
1189 |
const char symbform[]= "%[a-zA-Z0-9!$%*+./:<=>?@^_~-]%100c"; |
const char symbform[]= "%[a-zA-Z0-9!$%*+./:<=>?@^_~-]%[\001-\377]"; |
1190 |
const char strform[]= "\"%[^\"]\"%100c"; |
const char strform[]= "\"%[^\"]\"%[\001-\377]"; |
1191 |
const char intform[]= "%i%100c"; |
const char intform[]= "%i%[\001-\377]"; |
1192 |
const char blankform[]= "%*[ \t]%100c"; |
const char blankform[]= "%*[ \t]%[\001-\377]"; |
1193 |
const char ebrackform[]= "%*1[]]%100c"; |
const char ebrackform[]= "%*1[]]%[\001-\377]"; |
1194 |
const char semicform[]= "%*1[;]%100c"; |
const char semicform[]= "%*1[;]%[\001-\377]"; |
1195 |
const char bbrackform[]= "%*1[[]%100c"; |
const char bbrackform[]= "%*1[[]%[\001-\377]"; |
1196 |
|
|
1197 |
int itemp, rerun= 0; |
int itemp; |
1198 |
static int depth= 0; |
static int depth= 0; |
1199 |
char *rest, *match; |
char *rest, *match; |
1200 |
size_t inlength; |
size_t inlength; |
1212 |
rest= malloc(inlength); |
rest= malloc(inlength); |
1213 |
|
|
1214 |
if(sscanf(env->in_string, blankform, rest)) { |
if(sscanf(env->in_string, blankform, rest)) { |
1215 |
rerun= 1; |
; |
1216 |
} else if(sscanf(env->in_string, intform, &itemp, rest) > 0) { |
} else if(sscanf(env->in_string, intform, &itemp, rest) > 0) { |
1217 |
push_int(&(env->head), itemp); |
push_int(env, itemp); |
1218 |
} else if(sscanf(env->in_string, strform, match, rest) > 0) { |
} else if(sscanf(env->in_string, strform, match, rest) > 0) { |
1219 |
push_cstring(&(env->head), match); |
push_cstring(env, match); |
1220 |
} else if(sscanf(env->in_string, symbform, match, rest) > 0) { |
} else if(sscanf(env->in_string, symbform, match, rest) > 0) { |
1221 |
push_sym(env, match); |
push_sym(env, match); |
1222 |
} else if(sscanf(env->in_string, ebrackform, rest) > 0) { |
} else if(sscanf(env->in_string, ebrackform, rest) > 0) { |
|
push_sym(env, "["); |
|
1223 |
pack(env); if(env->err) return; |
pack(env); if(env->err) return; |
1224 |
if(depth!=0) depth--; |
if(depth!=0) depth--; |
1225 |
} else if(sscanf(env->in_string, semicform, rest) > 0) { |
} else if(sscanf(env->in_string, semicform, rest) > 0) { |
1237 |
|
|
1238 |
env->in_string= rest; |
env->in_string= rest; |
1239 |
|
|
1240 |
if(rerun || depth) |
if(depth) |
1241 |
return read(env); |
return read(env); |
1242 |
} |
} |