9 |
/* strcmp, strcpy, strlen, strcat, strdup */ |
/* strcmp, strcpy, strlen, strcat, strdup */ |
10 |
#include <string.h> |
#include <string.h> |
11 |
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12 |
#define HASHTBLSIZE 65536 |
#define HASHTBLSIZE 2048 |
13 |
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14 |
/* First, define some types. */ |
/* First, define some types. */ |
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155 |
} |
} |
156 |
} |
} |
157 |
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/* Generic push function. */ |
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void push(stackitem** stack_head, stackitem* in_item) |
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{ |
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in_item->next= *stack_head; |
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*stack_head= in_item; |
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} |
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158 |
/* Push a value onto the stack */ |
/* Push a value onto the stack */ |
159 |
void push_val(stackitem **stack_head, value *val) |
void push_val(environment *env, value *val) |
160 |
{ |
{ |
161 |
stackitem *new_item= malloc(sizeof(stackitem)); |
stackitem *new_item= malloc(sizeof(stackitem)); |
162 |
new_item->item= val; |
new_item->item= val; |
163 |
val->refcount++; |
val->refcount++; |
164 |
push(stack_head, new_item); |
new_item->next= env->head; |
165 |
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env->head= new_item; |
166 |
} |
} |
167 |
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168 |
/* Push an integer onto the stack. */ |
/* Push an integer onto the stack. */ |
169 |
void push_int(stackitem **stack_head, int in_val) |
void push_int(environment *env, int in_val) |
170 |
{ |
{ |
171 |
value *new_value= malloc(sizeof(value)); |
value *new_value= malloc(sizeof(value)); |
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stackitem *new_item= malloc(sizeof(stackitem)); |
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new_item->item= new_value; |
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172 |
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173 |
new_value->content.val= in_val; |
new_value->content.val= in_val; |
174 |
new_value->type= integer; |
new_value->type= integer; |
175 |
new_value->refcount=1; |
new_value->refcount=1; |
176 |
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177 |
push(stack_head, new_item); |
push_val(env, new_value); |
178 |
} |
} |
179 |
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180 |
/* Copy a string onto the stack. */ |
/* Copy a string onto the stack. */ |
181 |
void push_cstring(stackitem **stack_head, const char *in_string) |
void push_cstring(environment *env, const char *in_string) |
182 |
{ |
{ |
183 |
value *new_value= malloc(sizeof(value)); |
value *new_value= malloc(sizeof(value)); |
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stackitem *new_item= malloc(sizeof(stackitem)); |
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new_item->item=new_value; |
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184 |
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new_value->content.ptr= malloc(strlen(in_string)+1); |
new_value->content.ptr= malloc(strlen(in_string)+1); |
186 |
strcpy(new_value->content.ptr, in_string); |
strcpy(new_value->content.ptr, in_string); |
187 |
new_value->type= string; |
new_value->type= string; |
188 |
new_value->refcount=1; |
new_value->refcount=1; |
189 |
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190 |
push(stack_head, new_item); |
push_val(env, new_value); |
191 |
} |
} |
192 |
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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; |
237 |
new_value->refcount=1; |
new_value->refcount=1; |
238 |
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239 |
push_val(&(env->head), new_value); |
push_val(env, new_value); |
240 |
} |
} |
241 |
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/* Push a symbol onto the stack. */ |
/* Push a symbol onto the stack. */ |
243 |
void push_sym(environment *env, const char *in_string) |
void push_sym(environment *env, const char *in_string) |
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{ |
{ |
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stackitem *new_item; /* The new stack item */ |
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/* ...which will contain... */ |
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value *new_value; /* A new symbol value */ |
value *new_value; /* A new symbol value */ |
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/* ...which might point to... */ |
/* ...which might point to... */ |
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symbol **new_symbol; /* (if needed) A new actual symbol */ |
symbol **new_symbol; /* (if needed) A new actual symbol */ |
254 |
const char *dlerr; /* Dynamic linker error */ |
const char *dlerr; /* Dynamic linker error */ |
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char *mangled; /* Mangled function name */ |
char *mangled; /* Mangled function name */ |
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/* Create a new stack item containing a new value */ |
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new_item= malloc(sizeof(stackitem)); |
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new_value= malloc(sizeof(value)); |
new_value= malloc(sizeof(value)); |
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new_item->item=new_value; |
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/* The new value is a symbol */ |
/* The new value is a symbol */ |
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new_value->type= symb; |
new_value->type= symb; |
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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_val(env, new_value); |
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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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/* Make a list. */ |
/* Make a list. */ |
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extern void pack(environment *env) |
extern void pack(environment *env) |
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{ |
{ |
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void* delimiter; |
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stackitem *iterator, *temp; |
stackitem *iterator, *temp; |
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value *pack; |
value *pack; |
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delimiter= env->head->item->content.ptr; /* Get delimiter */ |
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toss(env); |
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iterator= env->head; |
iterator= env->head; |
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if(iterator==NULL || iterator->item->content.ptr==delimiter) { |
if(iterator==NULL |
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|| (iterator->item->type==symb |
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&& ((symbol*)(iterator->item->content.ptr))->id[0]=='[')) { |
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temp= NULL; |
temp= NULL; |
571 |
toss(env); |
toss(env); |
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} else { |
} else { |
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/* Search for first delimiter */ |
/* Search for first delimiter */ |
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while(iterator->next!=NULL |
while(iterator->next!=NULL |
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&& iterator->next->item->content.ptr!=delimiter) |
&& (iterator->next->item->type!=symb |
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|| ((symbol*)(iterator->next->item->content.ptr))->id[0]!='[')) |
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iterator= iterator->next; |
iterator= iterator->next; |
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/* Extract list */ |
/* Extract list */ |
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pack->content.ptr= temp; |
pack->content.ptr= temp; |
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pack->refcount= 1; |
pack->refcount= 1; |
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temp= malloc(sizeof(stackitem)); |
push_val(env, pack); |
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temp->item= pack; |
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push(&(env->head), 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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653 |
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 */ |
781 |
extern void errn(environment *env){ |
extern void errn(environment *env){ |
782 |
push_int(&(env->head), env->err); |
push_int(env, env->err); |
783 |
} |
} |
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extern void read(environment*); |
extern void read(environment*); |
834 |
strcpy(new_string, b_val->content.ptr); |
strcpy(new_string, b_val->content.ptr); |
835 |
strcat(new_string, a_val->content.ptr); |
strcat(new_string, a_val->content.ptr); |
836 |
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); |
838 |
free(new_string); |
free(new_string); |
839 |
return; |
return; |
840 |
} |
} |
854 |
b=env->head->item->content.val; |
b=env->head->item->content.val; |
855 |
toss(env); |
toss(env); |
856 |
if(env->err) return; |
if(env->err) return; |
857 |
push_int(&(env->head), a+b); |
push_int(env, a+b); |
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} |
} |
859 |
} |
} |
860 |
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b=env->head->item->content.val; |
b=env->head->item->content.val; |
884 |
toss(env); |
toss(env); |
885 |
if(env->err) return; |
if(env->err) return; |
886 |
push_int(&(env->head), b-a); |
push_int(env, b-a); |
887 |
} |
} |
888 |
} |
} |
889 |
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b=env->head->item->content.val; |
b=env->head->item->content.val; |
913 |
toss(env); |
toss(env); |
914 |
if(env->err) return; |
if(env->err) return; |
915 |
push_int(&(env->head), b>a); |
push_int(env, b>a); |
916 |
} |
} |
917 |
} |
} |
918 |
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968 |
env->err=1; |
env->err=1; |
969 |
return; |
return; |
970 |
} |
} |
971 |
push_val(&(env->head), copy_val(env->head->item)); |
push_val(env, copy_val(env->head->item)); |
972 |
} |
} |
973 |
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974 |
/* "if", If-Then */ |
/* "if", If-Then */ |
1059 |
toss(env); if(env->err) return; |
toss(env); if(env->err) return; |
1060 |
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1061 |
do { |
do { |
1062 |
push_val(&(env->head), test); |
push_val(env, test); |
1063 |
eval(env); |
eval(env); |
1064 |
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1065 |
if(env->head->item->type != integer) { |
if(env->head->item->type != integer) { |
1072 |
toss(env); if(env->err) return; |
toss(env); if(env->err) return; |
1073 |
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1074 |
if(truth) { |
if(truth) { |
1075 |
push_val(&(env->head), loop); |
push_val(env, loop); |
1076 |
eval(env); |
eval(env); |
1077 |
} else { |
} else { |
1078 |
toss(env); |
toss(env); |
1113 |
iterator= foo->content.ptr; |
iterator= foo->content.ptr; |
1114 |
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1115 |
while(iterator!=NULL) { |
while(iterator!=NULL) { |
1116 |
push_val(&(env->head), iterator->item); |
push_val(env, iterator->item); |
1117 |
push_val(&(env->head), loop); |
push_val(env, loop); |
1118 |
eval(env); if(env->err) return; |
eval(env); if(env->err) return; |
1119 |
iterator= iterator->next; |
iterator= iterator->next; |
1120 |
} |
} |
1126 |
/* 'to' */ |
/* 'to' */ |
1127 |
extern void to(environment *env) { |
extern void to(environment *env) { |
1128 |
int i, start, ending; |
int i, start, ending; |
1129 |
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stackitem *temp_head; |
1130 |
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value *temp_val; |
1131 |
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1132 |
if((env->head)==NULL || env->head->next==NULL) { |
if((env->head)==NULL || env->head->next==NULL) { |
1133 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
1147 |
start= env->head->item->content.val; |
start= env->head->item->content.val; |
1148 |
toss(env); if(env->err) return; |
toss(env); if(env->err) return; |
1149 |
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1150 |
push_sym(env, "["); |
temp_head= env->head; |
1151 |
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env->head= NULL; |
1152 |
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1153 |
if(ending>=start) { |
if(ending>=start) { |
1154 |
for(i= start; i<=ending; i++) |
for(i= ending; i>=start; i--) |
1155 |
push_int(&(env->head), i); |
push_int(env, i); |
1156 |
} else { |
} else { |
1157 |
for(i= start; i>=ending; i--) |
for(i= ending; i<=start; i++) |
1158 |
push_int(&(env->head), i); |
push_int(env, i); |
1159 |
} |
} |
1160 |
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1161 |
push_sym(env, "["); |
temp_val= malloc(sizeof(value)); |
1162 |
pack(env); if(env->err) return; |
temp_val->content.ptr= env->head; |
1163 |
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temp_val->refcount= 1; |
1164 |
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temp_val->type= list; |
1165 |
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env->head= temp_head; |
1166 |
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push_val(env, temp_val); |
1167 |
} |
} |
1168 |
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1169 |
/* Read a string */ |
/* Read a string */ |
1171 |
char in_string[101]; |
char in_string[101]; |
1172 |
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1173 |
fgets(in_string, 100, stdin); |
fgets(in_string, 100, stdin); |
1174 |
push_cstring(&(env->head), in_string); |
push_cstring(env, in_string); |
1175 |
} |
} |
1176 |
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1177 |
/* Read a value and place on stack */ |
/* Read a value and place on stack */ |
1204 |
if(sscanf(env->in_string, blankform, rest)) { |
if(sscanf(env->in_string, blankform, rest)) { |
1205 |
; |
; |
1206 |
} else if(sscanf(env->in_string, intform, &itemp, rest) > 0) { |
} else if(sscanf(env->in_string, intform, &itemp, rest) > 0) { |
1207 |
push_int(&(env->head), itemp); |
push_int(env, itemp); |
1208 |
} else if(sscanf(env->in_string, strform, match, rest) > 0) { |
} else if(sscanf(env->in_string, strform, match, rest) > 0) { |
1209 |
push_cstring(&(env->head), match); |
push_cstring(env, match); |
1210 |
} else if(sscanf(env->in_string, symbform, match, rest) > 0) { |
} else if(sscanf(env->in_string, symbform, match, rest) > 0) { |
1211 |
push_sym(env, match); |
push_sym(env, match); |
1212 |
} else if(sscanf(env->in_string, ebrackform, rest) > 0) { |
} else if(sscanf(env->in_string, ebrackform, rest) > 0) { |
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push_sym(env, "["); |
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1213 |
pack(env); if(env->err) return; |
pack(env); if(env->err) return; |
1214 |
if(depth!=0) depth--; |
if(depth!=0) depth--; |
1215 |
} else if(sscanf(env->in_string, semicform, rest) > 0) { |
} else if(sscanf(env->in_string, semicform, rest) > 0) { |