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/* strcmp, strcpy, strlen, strcat, strdup */ |
/* strcmp, strcpy, strlen, strcat, strdup */ |
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#include <string.h> |
#include <string.h> |
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#define HASHTBLSIZE 65536 |
#define HASHTBLSIZE 2048 |
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/* First, define some types. */ |
/* First, define some types. */ |
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} |
} |
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/* Generic push function. */ |
/* Generic push function. */ |
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void push(stackitem** stack_head, stackitem* in_item) |
void push(environment *env, stackitem* in_item) |
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{ |
{ |
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in_item->next= *stack_head; |
in_item->next= env->head; |
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*stack_head= in_item; |
env->head= in_item; |
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} |
} |
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/* Push a value onto the stack */ |
/* Push a value onto the stack */ |
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void push_val(stackitem **stack_head, value *val) |
void push_val(environment *env, value *val) |
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{ |
{ |
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stackitem *new_item= malloc(sizeof(stackitem)); |
stackitem *new_item= malloc(sizeof(stackitem)); |
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new_item->item= val; |
new_item->item= val; |
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val->refcount++; |
val->refcount++; |
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push(stack_head, new_item); |
push(env, new_item); |
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} |
} |
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/* Push an integer onto the stack. */ |
/* Push an integer onto the stack. */ |
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void push_int(stackitem **stack_head, int in_val) |
void push_int(environment *env, int in_val) |
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{ |
{ |
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value *new_value= malloc(sizeof(value)); |
value *new_value= malloc(sizeof(value)); |
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stackitem *new_item= malloc(sizeof(stackitem)); |
stackitem *new_item= malloc(sizeof(stackitem)); |
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new_value->type= integer; |
new_value->type= integer; |
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new_value->refcount=1; |
new_value->refcount=1; |
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push(stack_head, new_item); |
push(env, new_item); |
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} |
} |
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/* Copy a string onto the stack. */ |
/* Copy a string onto the stack. */ |
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void push_cstring(stackitem **stack_head, const char *in_string) |
void push_cstring(environment *env, const char *in_string) |
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{ |
{ |
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value *new_value= malloc(sizeof(value)); |
value *new_value= malloc(sizeof(value)); |
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stackitem *new_item= malloc(sizeof(stackitem)); |
stackitem *new_item= malloc(sizeof(stackitem)); |
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new_value->type= string; |
new_value->type= string; |
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new_value->refcount=1; |
new_value->refcount=1; |
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push(stack_head, new_item); |
push(env, new_item); |
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} |
} |
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/* Mangle a symbol name to a valid C identifier name */ |
/* Mangle a symbol name to a valid C identifier name */ |
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new_value->type= string; |
new_value->type= string; |
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new_value->refcount=1; |
new_value->refcount=1; |
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push_val(&(env->head), new_value); |
push_val(env, new_value); |
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} |
} |
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/* Push a symbol onto the stack. */ |
/* Push a symbol onto the stack. */ |
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new_fvalue->refcount= 1; |
new_fvalue->refcount= 1; |
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} |
} |
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} |
} |
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push(&(env->head), new_item); |
push(env, new_item); |
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} |
} |
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/* Print newline. */ |
/* Print newline. */ |
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} |
} |
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toss(env); /* toss the symbol */ |
toss(env); /* toss the symbol */ |
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if(env->err) return; |
if(env->err) return; |
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push_val(&(env->head), val); /* Return its bound value */ |
push_val(env, val); /* Return its bound value */ |
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} |
} |
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/* 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 |
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if(env->err) return; |
if(env->err) return; |
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iterator= (stackitem*)temp_val->content.ptr; |
iterator= (stackitem*)temp_val->content.ptr; |
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while(iterator!=NULL) { |
while(iterator!=NULL) { |
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push_val(&(env->head), iterator->item); |
push_val(env, iterator->item); |
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if(env->head->item->type==symb |
if(env->head->item->type==symb |
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&& strcmp(";", ((symbol*)(env->head->item->content.ptr))->id)==0) { |
&& strcmp(";", ((symbol*)(env->head->item->content.ptr))->id)==0) { |
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toss(env); |
toss(env); |
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temp= malloc(sizeof(stackitem)); |
temp= malloc(sizeof(stackitem)); |
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temp->item= pack; |
temp->item= pack; |
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push(&(env->head), temp); |
push(env, temp); |
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rev(env); |
rev(env); |
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} |
} |
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result= (left==right); |
result= (left==right); |
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toss(env); toss(env); |
toss(env); toss(env); |
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push_int(&(env->head), result); |
push_int(env, result); |
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} |
} |
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/* Negates the top element on the stack. */ |
/* Negates the top element on the stack. */ |
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val= env->head->item->content.val; |
val= env->head->item->content.val; |
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toss(env); |
toss(env); |
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push_int(&(env->head), !val); |
push_int(env, !val); |
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} |
} |
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/* 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 |
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/* Returns the current error number to the stack */ |
/* Returns the current error number to the stack */ |
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extern void errn(environment *env){ |
extern void errn(environment *env){ |
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push_int(&(env->head), env->err); |
push_int(env, env->err); |
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} |
} |
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extern void read(environment*); |
extern void read(environment*); |
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strcpy(new_string, b_val->content.ptr); |
strcpy(new_string, b_val->content.ptr); |
854 |
strcat(new_string, a_val->content.ptr); |
strcat(new_string, a_val->content.ptr); |
855 |
free_val(a_val); free_val(b_val); |
free_val(a_val); free_val(b_val); |
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push_cstring(&(env->head), new_string); |
push_cstring(env, new_string); |
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free(new_string); |
free(new_string); |
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return; |
return; |
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} |
} |
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b=env->head->item->content.val; |
b=env->head->item->content.val; |
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toss(env); |
toss(env); |
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if(env->err) return; |
if(env->err) return; |
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push_int(&(env->head), a+b); |
push_int(env, a+b); |
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} |
} |
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} |
} |
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b=env->head->item->content.val; |
b=env->head->item->content.val; |
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toss(env); |
toss(env); |
904 |
if(env->err) return; |
if(env->err) return; |
905 |
push_int(&(env->head), b-a); |
push_int(env, b-a); |
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} |
} |
907 |
} |
} |
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b=env->head->item->content.val; |
b=env->head->item->content.val; |
932 |
toss(env); |
toss(env); |
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if(env->err) return; |
if(env->err) return; |
934 |
push_int(&(env->head), b>a); |
push_int(env, b>a); |
935 |
} |
} |
936 |
} |
} |
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env->err=1; |
env->err=1; |
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return; |
return; |
989 |
} |
} |
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push_val(&(env->head), copy_val(env->head->item)); |
push_val(env, copy_val(env->head->item)); |
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} |
} |
992 |
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/* "if", If-Then */ |
/* "if", If-Then */ |
1078 |
toss(env); if(env->err) return; |
toss(env); if(env->err) return; |
1079 |
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1080 |
do { |
do { |
1081 |
push_val(&(env->head), test); |
push_val(env, test); |
1082 |
eval(env); |
eval(env); |
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1084 |
if(env->head->item->type != integer) { |
if(env->head->item->type != integer) { |
1091 |
toss(env); if(env->err) return; |
toss(env); if(env->err) return; |
1092 |
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1093 |
if(truth) { |
if(truth) { |
1094 |
push_val(&(env->head), loop); |
push_val(env, loop); |
1095 |
eval(env); |
eval(env); |
1096 |
} else { |
} else { |
1097 |
toss(env); |
toss(env); |
1132 |
iterator= foo->content.ptr; |
iterator= foo->content.ptr; |
1133 |
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1134 |
while(iterator!=NULL) { |
while(iterator!=NULL) { |
1135 |
push_val(&(env->head), iterator->item); |
push_val(env, iterator->item); |
1136 |
push_val(&(env->head), loop); |
push_val(env, loop); |
1137 |
eval(env); if(env->err) return; |
eval(env); if(env->err) return; |
1138 |
iterator= iterator->next; |
iterator= iterator->next; |
1139 |
} |
} |
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1169 |
if(ending>=start) { |
if(ending>=start) { |
1170 |
for(i= start; i<=ending; i++) |
for(i= start; i<=ending; i++) |
1171 |
push_int(&(env->head), i); |
push_int(env, i); |
1172 |
} else { |
} else { |
1173 |
for(i= start; i>=ending; i--) |
for(i= start; i>=ending; i--) |
1174 |
push_int(&(env->head), i); |
push_int(env, i); |
1175 |
} |
} |
1176 |
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push_sym(env, "["); |
push_sym(env, "["); |
1183 |
char in_string[101]; |
char in_string[101]; |
1184 |
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1185 |
fgets(in_string, 100, stdin); |
fgets(in_string, 100, stdin); |
1186 |
push_cstring(&(env->head), in_string); |
push_cstring(env, in_string); |
1187 |
} |
} |
1188 |
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1189 |
/* Read a value and place on stack */ |
/* Read a value and place on stack */ |
1216 |
if(sscanf(env->in_string, blankform, rest)) { |
if(sscanf(env->in_string, blankform, rest)) { |
1217 |
; |
; |
1218 |
} else if(sscanf(env->in_string, intform, &itemp, rest) > 0) { |
} else if(sscanf(env->in_string, intform, &itemp, rest) > 0) { |
1219 |
push_int(&(env->head), itemp); |
push_int(env, itemp); |
1220 |
} else if(sscanf(env->in_string, strform, match, rest) > 0) { |
} else if(sscanf(env->in_string, strform, match, rest) > 0) { |
1221 |
push_cstring(&(env->head), match); |
push_cstring(env, match); |
1222 |
} else if(sscanf(env->in_string, symbform, match, rest) > 0) { |
} else if(sscanf(env->in_string, symbform, match, rest) > 0) { |
1223 |
push_sym(env, match); |
push_sym(env, match); |
1224 |
} else if(sscanf(env->in_string, ebrackform, rest) > 0) { |
} else if(sscanf(env->in_string, ebrackform, rest) > 0) { |