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#include "garbage.h"
#include "scope.h"
#include "symbol.h"
Scope*
scope_new(Hash *p_hash_syms) {
Scope *p_scope = malloc(sizeof(Scope));
p_scope->p_hash_global = p_hash_syms;
p_scope->p_stack_scopes = stack_new();
return (p_scope);
}
void
scope_delete(Scope *p_scope) {
while (!stack_empty(p_scope->p_stack_scopes))
scope_down(p_scope);
stack_delete(p_scope->p_stack_scopes);
free(p_scope);
}
void
scope_up(Scope *p_scope) {
stack_push(p_scope->p_stack_scopes, hash_new(1024));
}
void
scope_down(Scope *p_scope) {
Hash *p_hash_syms = stack_pop(p_scope->p_stack_scopes);
hash_iterate(p_hash_syms, symbol_cleanup_hash_syms_cb);
hash_delete(p_hash_syms);
}
static Hash*
_scope_get_hash(Scope *p_scope, char *c_key) {
StackIterator *p_iter = stackiterator_new(p_scope->p_stack_scopes);
while (stackiterator_has_next(p_iter)) {
Hash *p_hash_syms = stackiterator_next(p_iter);
Symbol *p_symbol = hash_get(p_hash_syms, c_key);
if (p_symbol != NULL) {
stackiterator_delete(p_iter);
return (p_hash_syms);
}
}
stackiterator_delete(p_iter);
if (hash_get(p_scope->p_hash_global, c_key))
return (p_scope->p_hash_global);
return (NULL);
}
Symbol*
scope_get(Scope *p_scope, char *c_key) {
Hash *p_hash_syms = _scope_get_hash(p_scope, c_key);
if (p_hash_syms == NULL)
return (NULL);
return (hash_get(p_hash_syms, c_key));
}
Symbol*
scope_remove(Scope *p_scope, char *c_key) {
Hash *p_hash_syms = _scope_get_hash(p_scope, c_key);
if (p_hash_syms == NULL)
return (NULL);
Symbol *p_symbol = hash_remove(p_hash_syms, c_key);
return (p_symbol);
}
_Bool
scope_exists(Scope *p_scope, char *c_key) {
return (scope_get(p_scope, c_key) != NULL);
}
_Bool
scope_reset(Scope *p_scope, char *c_key, Symbol *p_symbol) {
Hash *p_hash_syms = _scope_get_hash(p_scope, c_key);
if (p_hash_syms == NULL)
return (false);
hash_remove(p_hash_syms, c_key);
hash_insert(p_hash_syms, c_key, p_symbol);
return (true);
}
_Bool
scope_newset(Scope *p_scope, char *c_key, Symbol *p_symbol) {
Hash *p_hash_syms = NULL;
if (stack_empty(p_scope->p_stack_scopes)) {
if (hash_get(p_scope->p_hash_global, c_key) != NULL)
return (false);
p_hash_syms = p_scope->p_hash_global;
} else {
p_hash_syms = stack_top(p_scope->p_stack_scopes);
}
hash_insert(p_hash_syms, c_key, p_symbol);
return (true);
}
void
_scope_print_cb(void *p_void, int i_level) {
Hash *p_hash_syms = p_void;
if (i_level > 0)
printf("%d level(s) up:\n", i_level);
hash_iterate_key(p_hash_syms, symbol_print_cb);
}
void
scope_print(Scope *p_scope) {
printf("Scopes:\n");
printf("Scope stack size: %d\n", stack_size(p_scope->p_stack_scopes));
printf("Global symbols:\n");
hash_iterate_key(p_scope->p_hash_global, symbol_print_cb);
printf("Local symbols:\n");
stack_iterate_level(p_scope->p_stack_scopes, _scope_print_cb);
}
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