48 |
typedef struct stackitem_struct |
typedef struct stackitem_struct |
49 |
{ |
{ |
50 |
value *item; /* The value on the stack */ |
value *item; /* The value on the stack */ |
51 |
|
/* (This is never NULL) */ |
52 |
struct stackitem_struct *next; /* Next item */ |
struct stackitem_struct *next; /* Next item */ |
53 |
} stackitem; |
} stackitem; |
54 |
|
|
347 |
case list: |
case list: |
348 |
push_sym(env, "list"); |
push_sym(env, "list"); |
349 |
break; |
break; |
|
default: |
|
|
push_sym(env, "unknown"); |
|
|
break; |
|
350 |
} |
} |
351 |
} |
} |
352 |
|
|
358 |
printf("%d", stack_head->item->content.val); |
printf("%d", stack_head->item->content.val); |
359 |
break; |
break; |
360 |
case string: |
case string: |
361 |
printf("\"%s\"", (char*)stack_head->item->content.ptr); |
printf("%s", (char*)stack_head->item->content.ptr); |
362 |
break; |
break; |
363 |
case symb: |
case symb: |
364 |
printf("%s", ((symbol *)(stack_head->item->content.ptr))->id); |
printf("%s", ((symbol *)(stack_head->item->content.ptr))->id); |
377 |
} |
} |
378 |
printf("]"); |
printf("]"); |
379 |
break; |
break; |
|
default: |
|
|
printf("#<unknown %p>", (stack_head->item->content.ptr)); |
|
|
break; |
|
380 |
} |
} |
381 |
} |
} |
382 |
|
|
433 |
env->head->next= temp; |
env->head->next= temp; |
434 |
} |
} |
435 |
|
|
436 |
|
/* Rotate the first three elements on the stack. */ |
437 |
|
extern void rot(environment *env) |
438 |
|
{ |
439 |
|
stackitem *temp= env->head; |
440 |
|
|
441 |
|
if(env->head==NULL || env->head->next==NULL |
442 |
|
|| env->head->next->next==NULL) { |
443 |
|
printerr("Too Few Arguments"); |
444 |
|
env->err=1; |
445 |
|
return; |
446 |
|
} |
447 |
|
|
448 |
|
env->head= env->head->next->next; |
449 |
|
temp->next->next= env->head->next; |
450 |
|
env->head->next= temp; |
451 |
|
} |
452 |
|
|
453 |
/* Recall a value from a symbol, if bound */ |
/* Recall a value from a symbol, if bound */ |
454 |
extern void rcl(environment *env) |
extern void rcl(environment *env) |
455 |
{ |
{ |
502 |
rcl(env); /* get its contents */ |
rcl(env); /* get its contents */ |
503 |
if(env->err) return; |
if(env->err) return; |
504 |
if(env->head->item->type!=symb){ /* don't recurse symbols */ |
if(env->head->item->type!=symb){ /* don't recurse symbols */ |
505 |
eval(env); /* evaluate the value */ |
return eval(env); /* evaluate the value */ |
|
return; |
|
506 |
} |
} |
507 |
break; |
return; |
508 |
|
|
509 |
/* If it's a lone function value, run it */ |
/* If it's a lone function value, run it */ |
510 |
case func: |
case func: |
511 |
in_func= (funcp)(env->head->item->content.ptr); |
in_func= (funcp)(env->head->item->content.ptr); |
512 |
toss(env); |
toss(env); |
513 |
if(env->err) return; |
if(env->err) return; |
514 |
(*in_func)(env); |
return (*in_func)(env); |
|
break; |
|
515 |
|
|
516 |
/* If it's a list */ |
/* If it's a list */ |
517 |
case list: |
case list: |
520 |
toss(env); |
toss(env); |
521 |
if(env->err) return; |
if(env->err) return; |
522 |
iterator= (stackitem*)temp_val->content.ptr; |
iterator= (stackitem*)temp_val->content.ptr; |
523 |
while(iterator!=NULL && iterator->item!=NULL) { |
while(iterator!=NULL) { |
524 |
push_val(&(env->head), iterator->item); |
push_val(&(env->head), iterator->item); |
525 |
if(env->head->item->type==symb |
if(env->head->item->type==symb |
526 |
&& strcmp(";", ((symbol*)(env->head->item->content.ptr))->id)==0) { |
&& strcmp(";", ((symbol*)(env->head->item->content.ptr))->id)==0) { |
527 |
toss(env); |
toss(env); |
528 |
if(env->err) return; |
if(env->err) return; |
529 |
|
if(iterator->next == NULL){ |
530 |
|
free_val(temp_val); |
531 |
|
return eval(env); |
532 |
|
} |
533 |
eval(env); |
eval(env); |
534 |
if(env->err) return; |
if(env->err) return; |
535 |
} |
} |
536 |
iterator= iterator->next; |
iterator= iterator->next; |
537 |
} |
} |
538 |
free_val(temp_val); |
free_val(temp_val); |
539 |
break; |
return; |
540 |
|
|
541 |
/* If it's a string */ |
/* If it's a string */ |
542 |
case string: |
case string: |
546 |
if(env->err) return; |
if(env->err) return; |
547 |
temp_string= malloc(strlen((char*)temp_val->content.ptr)+5); |
temp_string= malloc(strlen((char*)temp_val->content.ptr)+5); |
548 |
strcpy(temp_string, "[ "); |
strcpy(temp_string, "[ "); |
549 |
strcat(temp_string, (char*)temp_val->content.ptr); |
strcpy(temp_string+2, (char*)temp_val->content.ptr); |
550 |
|
free_val(temp_val); |
551 |
strcat(temp_string, " ]"); |
strcat(temp_string, " ]"); |
552 |
stack_read(env, temp_string); |
stack_read(env, temp_string); |
|
eval(env); |
|
|
if(env->err) return; |
|
|
free_val(temp_val); |
|
553 |
free(temp_string); |
free(temp_string); |
554 |
break; |
return eval(env); |
555 |
|
|
556 |
case integer: |
case integer: |
557 |
break; |
return; |
558 |
} |
} |
559 |
} |
} |
560 |
|
|
955 |
a=env->head->item->content.val; |
a=env->head->item->content.val; |
956 |
toss(env); |
toss(env); |
957 |
if(env->err) return; |
if(env->err) return; |
958 |
b=env->head->item->content.val; |
if(env->head->item->refcount == 1) |
959 |
|
env->head->item->content.val += a; |
960 |
|
else { |
961 |
|
b=env->head->item->content.val; |
962 |
|
toss(env); |
963 |
|
if(env->err) return; |
964 |
|
push_int(&(env->head), a+b); |
965 |
|
} |
966 |
|
} |
967 |
|
|
968 |
|
/* - */ |
969 |
|
extern void sx_2d(environment *env) { |
970 |
|
int a, b; |
971 |
|
|
972 |
|
if((env->head)==NULL || env->head->next==NULL) { |
973 |
|
printerr("Too Few Arguments"); |
974 |
|
env->err=1; |
975 |
|
return; |
976 |
|
} |
977 |
|
|
978 |
|
if(env->head->item->type!=integer |
979 |
|
|| env->head->next->item->type!=integer) { |
980 |
|
printerr("Bad Argument Type"); |
981 |
|
env->err=2; |
982 |
|
return; |
983 |
|
} |
984 |
|
a=env->head->item->content.val; |
985 |
|
toss(env); |
986 |
|
if(env->err) return; |
987 |
|
if(env->head->item->refcount == 1) |
988 |
|
env->head->item->content.val -= a; |
989 |
|
else { |
990 |
|
b=env->head->item->content.val; |
991 |
|
toss(env); |
992 |
|
if(env->err) return; |
993 |
|
push_int(&(env->head), b-a); |
994 |
|
} |
995 |
|
} |
996 |
|
|
997 |
|
/* > */ |
998 |
|
extern void sx_3e(environment *env) { |
999 |
|
int a, b; |
1000 |
|
|
1001 |
|
if((env->head)==NULL || env->head->next==NULL) { |
1002 |
|
printerr("Too Few Arguments"); |
1003 |
|
env->err=1; |
1004 |
|
return; |
1005 |
|
} |
1006 |
|
|
1007 |
|
if(env->head->item->type!=integer |
1008 |
|
|| env->head->next->item->type!=integer) { |
1009 |
|
printerr("Bad Argument Type"); |
1010 |
|
env->err=2; |
1011 |
|
return; |
1012 |
|
} |
1013 |
|
a=env->head->item->content.val; |
1014 |
toss(env); |
toss(env); |
1015 |
if(env->err) return; |
if(env->err) return; |
1016 |
push_int(&(env->head), a+b); |
if(env->head->item->refcount == 1) |
1017 |
|
env->head->item->content.val = (env->head->item->content.val > a); |
1018 |
|
else { |
1019 |
|
b=env->head->item->content.val; |
1020 |
|
toss(env); |
1021 |
|
if(env->err) return; |
1022 |
|
push_int(&(env->head), b>a); |
1023 |
|
} |
1024 |
} |
} |
1025 |
|
|
1026 |
/* Return copy of a value */ |
/* Return copy of a value */ |
1077 |
} |
} |
1078 |
push_val(&(env->head), copy_val(env->head->item)); |
push_val(&(env->head), copy_val(env->head->item)); |
1079 |
} |
} |
1080 |
|
|
1081 |
|
/* "if", If-Then */ |
1082 |
|
extern void sx_6966(environment *env) { |
1083 |
|
|
1084 |
|
int truth; |
1085 |
|
|
1086 |
|
if((env->head)==NULL || env->head->next==NULL) { |
1087 |
|
printerr("Too Few Arguments"); |
1088 |
|
env->err=1; |
1089 |
|
return; |
1090 |
|
} |
1091 |
|
|
1092 |
|
if(env->head->next->item->type != integer) { |
1093 |
|
printerr("Bad Argument Type"); |
1094 |
|
env->err=2; |
1095 |
|
return; |
1096 |
|
} |
1097 |
|
|
1098 |
|
swap(env); |
1099 |
|
if(env->err) return; |
1100 |
|
|
1101 |
|
truth=env->head->item->content.val; |
1102 |
|
|
1103 |
|
toss(env); |
1104 |
|
if(env->err) return; |
1105 |
|
|
1106 |
|
if(truth) |
1107 |
|
eval(env); |
1108 |
|
else |
1109 |
|
toss(env); |
1110 |
|
} |
1111 |
|
|
1112 |
|
/* If-Then-Else */ |
1113 |
|
extern void ifelse(environment *env) { |
1114 |
|
|
1115 |
|
int truth; |
1116 |
|
|
1117 |
|
if((env->head)==NULL || env->head->next==NULL |
1118 |
|
|| env->head->next->next==NULL) { |
1119 |
|
printerr("Too Few Arguments"); |
1120 |
|
env->err=1; |
1121 |
|
return; |
1122 |
|
} |
1123 |
|
|
1124 |
|
if(env->head->next->next->item->type != integer) { |
1125 |
|
printerr("Bad Argument Type"); |
1126 |
|
env->err=2; |
1127 |
|
return; |
1128 |
|
} |
1129 |
|
|
1130 |
|
rot(env); |
1131 |
|
if(env->err) return; |
1132 |
|
|
1133 |
|
truth=env->head->item->content.val; |
1134 |
|
|
1135 |
|
toss(env); |
1136 |
|
if(env->err) return; |
1137 |
|
|
1138 |
|
if(!truth) |
1139 |
|
swap(env); |
1140 |
|
if(env->err) return; |
1141 |
|
|
1142 |
|
toss(env); |
1143 |
|
if(env->err) return; |
1144 |
|
|
1145 |
|
eval(env); |
1146 |
|
} |
1147 |
|
|
1148 |
|
/* while */ |
1149 |
|
extern void sx_7768696c65(environment *env) { |
1150 |
|
|
1151 |
|
int truth; |
1152 |
|
|
1153 |
|
if((env->head)==NULL || env->head->next==NULL) { |
1154 |
|
printerr("Too Few Arguments"); |
1155 |
|
env->err=1; |
1156 |
|
return; |
1157 |
|
} |
1158 |
|
|
1159 |
|
do { |
1160 |
|
swap(env); if(env->err) return; |
1161 |
|
dup(env); if(env->err) return; |
1162 |
|
eval(env); if(env->err) return; |
1163 |
|
|
1164 |
|
if(env->head->item->type != integer) { |
1165 |
|
printerr("Bad Argument Type"); |
1166 |
|
env->err=2; |
1167 |
|
return; |
1168 |
|
} |
1169 |
|
|
1170 |
|
truth= env->head->item->content.val; |
1171 |
|
|
1172 |
|
toss(env); if(env->err) return; |
1173 |
|
swap(env); if(env->err) return; |
1174 |
|
|
1175 |
|
if(truth) { |
1176 |
|
dup(env); |
1177 |
|
eval(env); |
1178 |
|
} else { |
1179 |
|
toss(env); |
1180 |
|
toss(env); |
1181 |
|
} |
1182 |
|
|
1183 |
|
} while(truth); |
1184 |
|
} |