1 |
/* printf */ |
/* printf, sscanf, fgets, fprintf */ |
2 |
#include <stdio.h> |
#include <stdio.h> |
3 |
/* EXIT_SUCCESS */ |
/* exit, EXIT_SUCCESS, malloc, free */ |
4 |
#include <stdlib.h> |
#include <stdlib.h> |
5 |
/* NULL */ |
/* NULL */ |
6 |
#include <stddef.h> |
#include <stddef.h> |
7 |
/* dlopen, dlsym, dlerror */ |
/* dlopen, dlsym, dlerror */ |
8 |
#include <dlfcn.h> |
#include <dlfcn.h> |
9 |
/* assert */ |
/* strcmp, strcpy, strlen, strcat, strdup */ |
|
#include <assert.h> |
|
|
/* strcat */ |
|
10 |
#include <string.h> |
#include <string.h> |
11 |
|
|
12 |
#define HASHTBLSIZE 65536 |
#define HASHTBLSIZE 65536 |
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 |
|
|
100 |
} |
} |
101 |
free(val); /* Free the actual list value */ |
free(val); /* Free the actual list value */ |
102 |
break; |
break; |
103 |
default: |
case integer: |
104 |
|
case func: |
105 |
|
case symb: |
106 |
break; |
break; |
107 |
} |
} |
108 |
} |
} |
199 |
} |
} |
200 |
|
|
201 |
/* Mangle a symbol name to a valid C identifier name */ |
/* Mangle a symbol name to a valid C identifier name */ |
202 |
char *mangle_(const char *old_string){ |
char *mangle_str(const char *old_string){ |
203 |
char validchars[] |
char validchars[] |
204 |
="0123456789abcdef"; |
="0123456789abcdef"; |
205 |
char *new_string, *current; |
char *new_string, *current; |
206 |
|
|
207 |
new_string=malloc(strlen(old_string)+4); |
new_string=malloc((strlen(old_string)*2)+4); |
208 |
strcpy(new_string, "sx_"); /* Stack eXternal */ |
strcpy(new_string, "sx_"); /* Stack eXternal */ |
209 |
current=new_string+3; |
current=new_string+3; |
210 |
while(old_string[0] != '\0'){ |
while(old_string[0] != '\0'){ |
211 |
current[0]=validchars[old_string[0]/16]; |
current[0]=validchars[(unsigned char)(old_string[0])/16]; |
212 |
current[1]=validchars[old_string[0]%16]; |
current[1]=validchars[(unsigned char)(old_string[0])%16]; |
213 |
current+=2; |
current+=2; |
214 |
old_string++; |
old_string++; |
215 |
} |
} |
234 |
return; |
return; |
235 |
} |
} |
236 |
|
|
237 |
new_string= mangle_((const char *)(env->head->item->content.ptr)); |
new_string= mangle_str((const char *)(env->head->item->content.ptr)); |
238 |
|
|
239 |
toss(env); |
toss(env); |
240 |
if(env->err) return; |
if(env->err) return; |
297 |
funcptr= dlsym(handle, in_string); /* Get function pointer */ |
funcptr= dlsym(handle, in_string); /* Get function pointer */ |
298 |
dlerr=dlerror(); |
dlerr=dlerror(); |
299 |
if(dlerr != NULL) { /* If no function was found */ |
if(dlerr != NULL) { /* If no function was found */ |
300 |
mangled=mangle_(in_string); |
mangled=mangle_str(in_string); |
301 |
funcptr= dlsym(handle, mangled); /* try mangling it */ |
funcptr= dlsym(handle, mangled); /* try mangling it */ |
302 |
free(mangled); |
free(mangled); |
303 |
dlerr=dlerror(); |
dlerr=dlerror(); |
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: |
545 |
toss(env); |
toss(env); |
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 |
strcat(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 |
default: |
case integer: |
557 |
|
return; |
558 |
} |
} |
559 |
} |
} |
560 |
|
|
918 |
/* + */ |
/* + */ |
919 |
extern void sx_2b(environment *env) { |
extern void sx_2b(environment *env) { |
920 |
int a, b; |
int a, b; |
921 |
|
size_t len; |
922 |
|
char* new_string; |
923 |
|
value *a_val, *b_val; |
924 |
|
|
925 |
if((env->head)==NULL || env->head->next==NULL) { |
if((env->head)==NULL || env->head->next==NULL) { |
926 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
927 |
env->err=1; |
env->err=1; |
928 |
return; |
return; |
929 |
} |
} |
930 |
|
|
931 |
|
if(env->head->item->type==string |
932 |
|
&& env->head->next->item->type==string) { |
933 |
|
a_val= env->head->item; |
934 |
|
b_val= env->head->next->item; |
935 |
|
a_val->refcount++; |
936 |
|
b_val->refcount++; |
937 |
|
toss(env); if(env->err) return; |
938 |
|
toss(env); if(env->err) return; |
939 |
|
len= strlen(a_val->content.ptr)+strlen(b_val->content.ptr)+1; |
940 |
|
new_string= malloc(len); |
941 |
|
strcpy(new_string, b_val->content.ptr); |
942 |
|
strcat(new_string, a_val->content.ptr); |
943 |
|
free_val(a_val); free_val(b_val); |
944 |
|
push_cstring(&(env->head), new_string); |
945 |
|
free(new_string); |
946 |
|
return; |
947 |
|
} |
948 |
|
|
949 |
if(env->head->item->type!=integer |
if(env->head->item->type!=integer |
950 |
|| env->head->next->item->type!=integer) { |
|| env->head->next->item->type!=integer) { |
960 |
if(env->err) return; |
if(env->err) return; |
961 |
push_int(&(env->head), a+b); |
push_int(&(env->head), a+b); |
962 |
} |
} |
963 |
|
|
964 |
|
/* - */ |
965 |
|
extern void sx_2d(environment *env) { |
966 |
|
int a; |
967 |
|
|
968 |
|
if((env->head)==NULL || env->head->next==NULL) { |
969 |
|
printerr("Too Few Arguments"); |
970 |
|
env->err=1; |
971 |
|
return; |
972 |
|
} |
973 |
|
|
974 |
|
if(env->head->item->type!=integer |
975 |
|
|| env->head->next->item->type!=integer) { |
976 |
|
printerr("Bad Argument Type"); |
977 |
|
env->err=2; |
978 |
|
return; |
979 |
|
} |
980 |
|
a=env->head->item->content.val; |
981 |
|
toss(env); |
982 |
|
if(env->err) return; |
983 |
|
env->head->item->content.val -= a; |
984 |
|
} |
985 |
|
|
986 |
|
/* > */ |
987 |
|
extern void sx_3e(environment *env) { |
988 |
|
int a; |
989 |
|
|
990 |
|
if((env->head)==NULL || env->head->next==NULL) { |
991 |
|
printerr("Too Few Arguments"); |
992 |
|
env->err=1; |
993 |
|
return; |
994 |
|
} |
995 |
|
|
996 |
|
if(env->head->item->type!=integer |
997 |
|
|| env->head->next->item->type!=integer) { |
998 |
|
printerr("Bad Argument Type"); |
999 |
|
env->err=2; |
1000 |
|
return; |
1001 |
|
} |
1002 |
|
a=env->head->item->content.val; |
1003 |
|
toss(env); |
1004 |
|
if(env->err) return; |
1005 |
|
env->head->item->content.val = (env->head->item->content.val > a); |
1006 |
|
} |
1007 |
|
|
1008 |
|
/* Return copy of a value */ |
1009 |
|
value *copy_val(value *old_value){ |
1010 |
|
stackitem *old_item, *new_item, *prev_item; |
1011 |
|
|
1012 |
|
value *new_value=malloc(sizeof(value)); |
1013 |
|
|
1014 |
|
new_value->type=old_value->type; |
1015 |
|
new_value->refcount=0; /* This is increased if/when this |
1016 |
|
value is referenced somewhere, like |
1017 |
|
in a stack item or a variable */ |
1018 |
|
switch(old_value->type){ |
1019 |
|
case integer: |
1020 |
|
new_value->content.val=old_value->content.val; |
1021 |
|
break; |
1022 |
|
case string: |
1023 |
|
(char *)(new_value->content.ptr) |
1024 |
|
= strdup((char *)(old_value->content.ptr)); |
1025 |
|
break; |
1026 |
|
case func: |
1027 |
|
case symb: |
1028 |
|
new_value->content.ptr=old_value->content.ptr; |
1029 |
|
break; |
1030 |
|
case list: |
1031 |
|
new_value->content.ptr=NULL; |
1032 |
|
|
1033 |
|
prev_item=NULL; |
1034 |
|
old_item=(stackitem *)(old_value->content.ptr); |
1035 |
|
|
1036 |
|
while(old_item != NULL) { /* While list is not empty */ |
1037 |
|
new_item= malloc(sizeof(stackitem)); |
1038 |
|
new_item->item=copy_val(old_item->item); /* recurse */ |
1039 |
|
new_item->next=NULL; |
1040 |
|
if(prev_item != NULL) /* If this wasn't the first item */ |
1041 |
|
prev_item->next=new_item; /* point the previous item to the |
1042 |
|
new item */ |
1043 |
|
else |
1044 |
|
new_value->content.ptr=new_item; |
1045 |
|
old_item=old_item->next; |
1046 |
|
prev_item=new_item; |
1047 |
|
} |
1048 |
|
break; |
1049 |
|
} |
1050 |
|
return new_value; |
1051 |
|
} |
1052 |
|
|
1053 |
|
/* duplicates an item on the stack */ |
1054 |
|
extern void dup(environment *env) { |
1055 |
|
if((env->head)==NULL) { |
1056 |
|
printerr("Too Few Arguments"); |
1057 |
|
env->err=1; |
1058 |
|
return; |
1059 |
|
} |
1060 |
|
push_val(&(env->head), copy_val(env->head->item)); |
1061 |
|
} |
1062 |
|
|
1063 |
|
/* "if", If-Then */ |
1064 |
|
extern void sx_6966(environment *env) { |
1065 |
|
|
1066 |
|
int truth; |
1067 |
|
|
1068 |
|
if((env->head)==NULL || env->head->next==NULL) { |
1069 |
|
printerr("Too Few Arguments"); |
1070 |
|
env->err=1; |
1071 |
|
return; |
1072 |
|
} |
1073 |
|
|
1074 |
|
if(env->head->next->item->type != integer) { |
1075 |
|
printerr("Bad Argument Type"); |
1076 |
|
env->err=2; |
1077 |
|
return; |
1078 |
|
} |
1079 |
|
|
1080 |
|
swap(env); |
1081 |
|
if(env->err) return; |
1082 |
|
|
1083 |
|
truth=env->head->item->content.val; |
1084 |
|
|
1085 |
|
toss(env); |
1086 |
|
if(env->err) return; |
1087 |
|
|
1088 |
|
if(truth) |
1089 |
|
eval(env); |
1090 |
|
else |
1091 |
|
toss(env); |
1092 |
|
} |
1093 |
|
|
1094 |
|
/* If-Then-Else */ |
1095 |
|
extern void ifelse(environment *env) { |
1096 |
|
|
1097 |
|
int truth; |
1098 |
|
|
1099 |
|
if((env->head)==NULL || env->head->next==NULL |
1100 |
|
|| env->head->next->next==NULL) { |
1101 |
|
printerr("Too Few Arguments"); |
1102 |
|
env->err=1; |
1103 |
|
return; |
1104 |
|
} |
1105 |
|
|
1106 |
|
if(env->head->next->next->item->type != integer) { |
1107 |
|
printerr("Bad Argument Type"); |
1108 |
|
env->err=2; |
1109 |
|
return; |
1110 |
|
} |
1111 |
|
|
1112 |
|
rot(env); |
1113 |
|
if(env->err) return; |
1114 |
|
|
1115 |
|
truth=env->head->item->content.val; |
1116 |
|
|
1117 |
|
toss(env); |
1118 |
|
if(env->err) return; |
1119 |
|
|
1120 |
|
if(!truth) |
1121 |
|
swap(env); |
1122 |
|
if(env->err) return; |
1123 |
|
|
1124 |
|
toss(env); |
1125 |
|
if(env->err) return; |
1126 |
|
|
1127 |
|
eval(env); |
1128 |
|
} |
1129 |
|
|
1130 |
|
/* while */ |
1131 |
|
extern void sx_7768696c65(environment *env) { |
1132 |
|
|
1133 |
|
int truth; |
1134 |
|
|
1135 |
|
if((env->head)==NULL || env->head->next==NULL) { |
1136 |
|
printerr("Too Few Arguments"); |
1137 |
|
env->err=1; |
1138 |
|
return; |
1139 |
|
} |
1140 |
|
|
1141 |
|
do { |
1142 |
|
swap(env); if(env->err) return; |
1143 |
|
dup(env); if(env->err) return; |
1144 |
|
eval(env); if(env->err) return; |
1145 |
|
|
1146 |
|
if(env->head->item->type != integer) { |
1147 |
|
printerr("Bad Argument Type"); |
1148 |
|
env->err=2; |
1149 |
|
return; |
1150 |
|
} |
1151 |
|
|
1152 |
|
truth= env->head->item->content.val; |
1153 |
|
|
1154 |
|
toss(env); if(env->err) return; |
1155 |
|
swap(env); if(env->err) return; |
1156 |
|
|
1157 |
|
if(truth) { |
1158 |
|
dup(env); |
1159 |
|
eval(env); |
1160 |
|
} else { |
1161 |
|
toss(env); |
1162 |
|
toss(env); |
1163 |
|
} |
1164 |
|
|
1165 |
|
} while(truth); |
1166 |
|
} |