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#include "atom.h"
#include "list.h"
#include <stdlib.h>
#include <string.h>
struct atom true_atom = { ATOM_TRUE };
struct atom false_atom = { ATOM_FALSE };
struct atom nil_atom = { ATOM_NIL } ;
struct atom *atom_new(char type)
{
struct atom *atom = calloc(1, sizeof(*atom));
atom->type = type;
return atom;
}
struct atom *atom_new_int(long l)
{
struct atom *atom = atom_new(ATOM_INT);
atom->l = l;
return atom;
}
struct atom *atom_new_str(const char *str, int len)
{
struct atom *atom = atom_new(ATOM_STR);
atom->str.str = strndup(str, len);
atom->str.len = len;
return atom;
}
struct atom *atom_new_sym(const char *sym, int len)
{
struct atom *atom = atom_new_str(sym, len);
atom->type = ATOM_SYMBOL;
return atom;
}
struct atom *atom_new_list(struct list *list)
{
struct atom *atom = atom_new(ATOM_LIST);
atom->list = list;
return atom;
}
struct atom *atom_clone(struct atom *atom)
{
switch (atom->type)
{
case ATOM_NIL:
case ATOM_TRUE:
case ATOM_FALSE:
return atom;
case ATOM_INT:
return atom_new_int(atom->l);
case ATOM_STR:
return atom_new_str(atom->str.str, atom->str.len);
case ATOM_SYMBOL:
return atom_new_sym(atom->str.str, atom->str.len);
case ATOM_LIST:
{
struct list *list = atom->list;
struct list *clone = NULL, *last = NULL;
while (list)
{
struct atom *a = LIST_GET_ATOM(list);
struct atom *b = atom_clone(a);
last = list_append(last, b);
list = list->next;
if (!clone)
clone = last;
}
return atom_new_list(clone);
}
}
return NULL;
}
#ifdef BUILD_TEST
#include "test_util.h"
TEST(atom_new)
{
struct atom *atom = atom_new(ATOM_STR);
ASSERT_TRUE(atom != NULL);
ASSERT_EQ(ATOM_STR, atom->type);
}
TEST(atom_new_int)
{
struct atom *atom = atom_new_int(42);
ASSERT_TRUE(atom != NULL);
ASSERT_EQ(42, atom->l);
}
TEST(atom_new_str)
{
struct atom *atom = atom_new_str("foobar", 6);
ASSERT_TRUE(atom != NULL);
ASSERT_STREQ("foobar", atom->str.str);
atom = atom_new_str("foobar", 3);
ASSERT_TRUE(atom != NULL);
ASSERT_STREQ("foo", atom->str.str);
ASSERT_EQ(ATOM_STR, atom->type);
}
TEST(atom_new_sym)
{
struct atom *atom = atom_new_sym("foobar", 6);
ASSERT_TRUE(atom != NULL);
ASSERT_STREQ("foobar", atom->str.str);
atom = atom_new_sym("foobar", 3);
ASSERT_TRUE(atom != NULL);
ASSERT_STREQ("foo", atom->str.str);
ASSERT_EQ(ATOM_SYMBOL, atom->type);
}
TEST(atom_new_list)
{
struct list list;
struct atom *atom = atom_new_list(&list);
ASSERT_TRUE(atom != NULL);
ASSERT_EQ(&list, atom->list);
ASSERT_EQ(ATOM_LIST, atom->type);
}
#endif
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