picrin/extlib/benz/symbol.c

208 lines
4.1 KiB
C

/**
* See Copyright Notice in picrin.h
*/
#include "picrin.h"
KHASH_DEFINE(s, const char *, pic_sym *, kh_str_hash_func, kh_str_hash_equal)
pic_sym *
pic_intern_str(pic_state *pic, pic_str *str)
{
return pic_intern(pic, pic_str_cstr(pic, str));
}
pic_sym *
pic_intern(pic_state *pic, const char *cstr)
{
khash_t(s) *h = &pic->syms;
pic_sym *sym;
khiter_t it;
int ret;
char *copy;
it = kh_put(s, h, cstr, &ret);
if (ret == 0) { /* if exists */
sym = kh_val(h, it);
pic_gc_protect(pic, pic_obj_value(sym));
return sym;
}
copy = pic_malloc(pic, strlen(cstr) + 1);
strcpy(copy, cstr);
kh_key(h, it) = copy;
kh_val(h, it) = pic->sQUOTE; /* insert dummy */
sym = (pic_sym *)pic_obj_alloc(pic, sizeof(pic_sym), PIC_TT_SYMBOL);
sym->cstr = copy;
kh_val(h, it) = sym;
return sym;
}
pic_id *
pic_make_identifier(pic_state *pic, pic_id *id, struct pic_env *env)
{
pic_id *nid;
nid = (pic_id *)pic_obj_alloc(pic, sizeof(pic_id), PIC_TT_ID);
nid->u.id.id = id;
nid->u.id.env = env;
return nid;
}
const char *
pic_symbol_name(pic_state PIC_UNUSED(*pic), pic_sym *sym)
{
return sym->cstr;
}
const char *
pic_identifier_name(pic_state *pic, pic_id *id)
{
while (! pic_sym_p(pic_obj_value(id))) {
id = id->u.id.id;
}
return pic_symbol_name(pic, (pic_sym *)id);
}
static pic_value
pic_symbol_symbol_p(pic_state *pic)
{
pic_value v;
pic_get_args(pic, "o", &v);
return pic_bool_value(pic_sym_p(v));
}
static pic_value
pic_symbol_symbol_eq_p(pic_state *pic)
{
int argc, i;
pic_value *argv;
pic_get_args(pic, "*", &argc, &argv);
for (i = 0; i < argc; ++i) {
if (! pic_sym_p(argv[i])) {
return pic_false_value();
}
if (! pic_eq_p(argv[i], argv[0])) {
return pic_false_value();
}
}
return pic_true_value();
}
static pic_value
pic_symbol_symbol_to_string(pic_state *pic)
{
pic_sym *sym;
pic_get_args(pic, "m", &sym);
return pic_obj_value(pic_make_str_cstr(pic, sym->cstr));
}
static pic_value
pic_symbol_string_to_symbol(pic_state *pic)
{
pic_str *str;
pic_get_args(pic, "s", &str);
return pic_obj_value(pic_intern_str(pic, str));
}
static pic_value
pic_symbol_identifier_p(pic_state *pic)
{
pic_value obj;
pic_get_args(pic, "o", &obj);
return pic_bool_value(pic_id_p(obj));
}
static pic_value
pic_symbol_make_identifier(pic_state *pic)
{
pic_value id, env;
pic_get_args(pic, "oo", &id, &env);
pic_assert_type(pic, id, id);
pic_assert_type(pic, env, env);
return pic_obj_value(pic_make_identifier(pic, pic_id_ptr(id), pic_env_ptr(env)));
}
static pic_value
pic_symbol_identifier_variable(pic_state *pic)
{
pic_value id;
pic_get_args(pic, "o", &id);
pic_assert_type(pic, id, id);
if (pic_sym_p(id)) {
pic_errorf(pic, "expected non-symbol identifier, but got symbol ~s", id);
}
return pic_obj_value(pic_id_ptr(id)->u.id.id);
}
static pic_value
pic_symbol_identifier_environment(pic_state *pic)
{
pic_value id;
pic_get_args(pic, "o", &id);
pic_assert_type(pic, id, id);
if (pic_sym_p(id)) {
pic_errorf(pic, "expected non-symbol identifier, but got symbol ~s", id);
}
return pic_obj_value(pic_id_ptr(id)->u.id.env);
}
static pic_value
pic_symbol_identifier_eq_p(pic_state *pic)
{
int argc, i;
pic_value *argv;
pic_get_args(pic, "*", &argc, &argv);
for (i = 0; i < argc; ++i) {
if (! pic_id_p(argv[i])) {
return pic_false_value();
}
if (! pic_equal_p(pic, argv[i], argv[0])) {
return pic_false_value();
}
}
return pic_true_value();
}
void
pic_init_symbol(pic_state *pic)
{
pic_defun(pic, "symbol?", pic_symbol_symbol_p);
pic_defun(pic, "symbol=?", pic_symbol_symbol_eq_p);
pic_defun(pic, "symbol->string", pic_symbol_symbol_to_string);
pic_defun(pic, "string->symbol", pic_symbol_string_to_symbol);
pic_defun(pic, "make-identifier", pic_symbol_make_identifier);
pic_defun(pic, "identifier?", pic_symbol_identifier_p);
pic_defun(pic, "identifier=?", pic_symbol_identifier_eq_p);
pic_defun(pic, "identifier-variable", pic_symbol_identifier_variable);
pic_defun(pic, "identifier-environment", pic_symbol_identifier_environment);
}