picrin/pair.c

764 lines
13 KiB
C

/**
* See Copyright Notice in picrin.h
*/
#include <stdarg.h>
#include "picrin.h"
#include "picrin/pair.h"
pic_value
pic_cons(pic_state *pic, pic_value car, pic_value cdr)
{
struct pic_pair *pair;
pair = (struct pic_pair *)pic_obj_alloc(pic, sizeof(struct pic_pair), PIC_TT_PAIR);
pair->car = car;
pair->cdr = cdr;
return pic_obj_value(pair);
}
pic_value
pic_car(pic_state *pic, pic_value obj)
{
struct pic_pair *pair;
if (! pic_pair_p(obj)) {
pic_errorf(pic, "pair required, but got ~s", obj);
}
pair = pic_pair_ptr(obj);
return pair->car;
}
pic_value
pic_cdr(pic_state *pic, pic_value obj)
{
struct pic_pair *pair;
if (! pic_pair_p(obj)) {
pic_errorf(pic, "pair required, but got ~s", obj);
}
pair = pic_pair_ptr(obj);
return pair->cdr;
}
void
pic_set_car(pic_state *pic, pic_value obj, pic_value val)
{
struct pic_pair *pair;
if (! pic_pair_p(obj)) {
pic_error(pic, "pair required");
}
pair = pic_pair_ptr(obj);
pair->car = val;
}
void
pic_set_cdr(pic_state *pic, pic_value obj, pic_value val)
{
struct pic_pair *pair;
if (! pic_pair_p(obj)) {
pic_error(pic, "pair required");
}
pair = pic_pair_ptr(obj);
pair->cdr = val;
}
bool
pic_list_p(pic_value obj)
{
pic_value local, rapid;
int i;
/* Floyd's cycle-finding algorithm. */
local = rapid = obj;
while (true) {
/* advance rapid fast-forward; runs 2x faster than local */
for (i = 0; i < 2; ++i) {
if (pic_pair_p(rapid)) {
rapid = pic_pair_ptr(rapid)->cdr;
}
else {
return pic_nil_p(rapid);
}
}
/* advance local */
local = pic_pair_ptr(local)->cdr;
if (pic_eq_p(local, rapid)) {
return false;
}
}
}
pic_value
pic_list1(pic_state *pic, pic_value obj1)
{
return pic_cons(pic, obj1, pic_nil_value());
}
pic_value
pic_list2(pic_state *pic, pic_value obj1, pic_value obj2)
{
size_t ai = pic_gc_arena_preserve(pic);
pic_value val;
val = pic_cons(pic, obj1, pic_list1(pic, obj2));
pic_gc_arena_restore(pic, ai);
pic_gc_protect(pic, val);
return val;
}
pic_value
pic_list3(pic_state *pic, pic_value obj1, pic_value obj2, pic_value obj3)
{
size_t ai = pic_gc_arena_preserve(pic);
pic_value val;
val = pic_cons(pic, obj1, pic_list2(pic, obj2, obj3));
pic_gc_arena_restore(pic, ai);
pic_gc_protect(pic, val);
return val;
}
pic_value
pic_list4(pic_state *pic, pic_value obj1, pic_value obj2, pic_value obj3, pic_value obj4)
{
size_t ai = pic_gc_arena_preserve(pic);
pic_value val;
val = pic_cons(pic, obj1, pic_list3(pic, obj2, obj3, obj4));
pic_gc_arena_restore(pic, ai);
pic_gc_protect(pic, val);
return val;
}
pic_value
pic_list5(pic_state *pic, pic_value obj1, pic_value obj2, pic_value obj3, pic_value obj4, pic_value obj5)
{
size_t ai = pic_gc_arena_preserve(pic);
pic_value val;
val = pic_cons(pic, obj1, pic_list4(pic, obj2, obj3, obj4, obj5));
pic_gc_arena_restore(pic, ai);
pic_gc_protect(pic, val);
return val;
}
pic_value
pic_list6(pic_state *pic, pic_value obj1, pic_value obj2, pic_value obj3, pic_value obj4, pic_value obj5, pic_value obj6)
{
size_t ai = pic_gc_arena_preserve(pic);
pic_value val;
val = pic_cons(pic, obj1, pic_list5(pic, obj2, obj3, obj4, obj5, obj6));
pic_gc_arena_restore(pic, ai);
pic_gc_protect(pic, val);
return val;
}
pic_value
pic_list7(pic_state *pic, pic_value obj1, pic_value obj2, pic_value obj3, pic_value obj4, pic_value obj5, pic_value obj6, pic_value obj7)
{
size_t ai = pic_gc_arena_preserve(pic);
pic_value val;
val = pic_cons(pic, obj1, pic_list6(pic, obj2, obj3, obj4, obj5, obj6, obj7));
pic_gc_arena_restore(pic, ai);
pic_gc_protect(pic, val);
return val;
}
pic_value
pic_list_by_array(pic_state *pic, size_t c, pic_value *vs)
{
pic_value v;
v = pic_nil_value();
while (c--) {
v = pic_cons(pic, vs[c], v);
}
return v;
}
pic_value
pic_make_list(pic_state *pic, int k, pic_value fill)
{
pic_value list;
int i;
list = pic_nil_value();
for (i = 0; i < k; ++i) {
list = pic_cons(pic, fill, list);
}
return list;
}
int
pic_length(pic_state *pic, pic_value obj)
{
int c = 0;
if (! pic_list_p(obj)) {
pic_errorf(pic, "length: expected list, but got ~s", obj);
}
while (! pic_nil_p(obj)) {
obj = pic_cdr(pic, obj);
++c;
}
return c;
}
pic_value
pic_reverse(pic_state *pic, pic_value list)
{
size_t ai = pic_gc_arena_preserve(pic);
pic_value v, acc;
acc = pic_nil_value();
pic_for_each(v, list) {
acc = pic_cons(pic, v, acc);
pic_gc_arena_restore(pic, ai);
pic_gc_protect(pic, acc);
}
return acc;
}
pic_value
pic_append(pic_state *pic, pic_value xs, pic_value ys)
{
size_t ai = pic_gc_arena_preserve(pic);
pic_value x;
xs = pic_reverse(pic, xs);
pic_for_each (x, xs) {
ys = pic_cons(pic, x, ys);
pic_gc_arena_restore(pic, ai);
pic_gc_protect(pic, xs);
pic_gc_protect(pic, ys);
}
return ys;
}
pic_value
pic_memq(pic_state *pic, pic_value key, pic_value list)
{
enter:
if (pic_nil_p(list))
return pic_false_value();
if (pic_eq_p(key, pic_car(pic, list)))
return list;
list = pic_cdr(pic, list);
goto enter;
}
pic_value
pic_memv(pic_state *pic, pic_value key, pic_value list)
{
enter:
if (pic_nil_p(list))
return pic_false_value();
if (pic_eqv_p(key, pic_car(pic, list)))
return list;
list = pic_cdr(pic, list);
goto enter;
}
pic_value
pic_member(pic_state *pic, pic_value key, pic_value list, struct pic_proc *compar)
{
enter:
if (pic_nil_p(list))
return pic_false_value();
if (compar == NULL) {
if (pic_equal_p(pic, key, pic_car(pic, list)))
return list;
} else {
if (pic_test(pic_apply2(pic, compar, key, pic_car(pic, list))))
return list;
}
list = pic_cdr(pic, list);
goto enter;
}
pic_value
pic_assq(pic_state *pic, pic_value key, pic_value assoc)
{
pic_value cell;
enter:
if (pic_nil_p(assoc))
return pic_false_value();
cell = pic_car(pic, assoc);
if (pic_eq_p(key, pic_car(pic, cell)))
return cell;
assoc = pic_cdr(pic, assoc);
goto enter;
}
pic_value
pic_assv(pic_state *pic, pic_value key, pic_value assoc)
{
pic_value cell;
enter:
if (pic_nil_p(assoc))
return pic_false_value();
cell = pic_car(pic, assoc);
if (pic_eqv_p(key, pic_car(pic, cell)))
return cell;
assoc = pic_cdr(pic, assoc);
goto enter;
}
pic_value
pic_assoc(pic_state *pic, pic_value key, pic_value assoc, struct pic_proc *compar)
{
pic_value cell;
enter:
if (pic_nil_p(assoc))
return pic_false_value();
cell = pic_car(pic, assoc);
if (compar == NULL) {
if (pic_equal_p(pic, key, pic_car(pic, cell)))
return cell;
} else {
if (pic_test(pic_apply2(pic, compar, key, pic_car(pic, cell))))
return cell;
}
assoc = pic_cdr(pic, assoc);
goto enter;
}
pic_value
pic_acons(pic_state *pic, pic_value key, pic_value val, pic_value assoc)
{
return pic_cons(pic, pic_cons(pic, key, val), assoc);
}
pic_value
pic_caar(pic_state *pic, pic_value v)
{
return pic_car(pic, pic_car(pic, v));
}
pic_value
pic_cadr(pic_state *pic, pic_value v)
{
return pic_car(pic, pic_cdr(pic, v));
}
pic_value
pic_cdar(pic_state *pic, pic_value v)
{
return pic_cdr(pic, pic_car(pic, v));
}
pic_value
pic_cddr(pic_state *pic, pic_value v)
{
return pic_cdr(pic, pic_cdr(pic, v));
}
pic_value
pic_list_tail(pic_state *pic, pic_value list, int i)
{
while (i-- > 0) {
list = pic_cdr(pic, list);
}
return list;
}
pic_value
pic_list_ref(pic_state *pic, pic_value list, int i)
{
return pic_car(pic, pic_list_tail(pic, list, i));
}
void
pic_list_set(pic_state *pic, pic_value list, int i, pic_value obj)
{
pic_pair_ptr(pic_list_tail(pic, list, i))->car = obj;
}
pic_value
pic_list_copy(pic_state *pic, pic_value obj)
{
if (pic_pair_p(obj)) {
return pic_cons(pic, pic_car(pic, obj), pic_list_copy(pic, pic_cdr(pic, obj)));
}
else {
return obj;
}
}
static pic_value
pic_pair_pair_p(pic_state *pic)
{
pic_value v;
pic_get_args(pic, "o", &v);
return pic_bool_value(pic_pair_p(v));
}
static pic_value
pic_pair_cons(pic_state *pic)
{
pic_value v,w;
pic_get_args(pic, "oo", &v, &w);
return pic_cons(pic, v, w);
}
static pic_value
pic_pair_car(pic_state *pic)
{
pic_value v;
pic_get_args(pic, "o", &v);
return pic_car(pic, v);
}
static pic_value
pic_pair_cdr(pic_state *pic)
{
pic_value v;
pic_get_args(pic, "o", &v);
return pic_cdr(pic, v);
}
static pic_value
pic_pair_caar(pic_state *pic)
{
pic_value v;
pic_get_args(pic, "o", &v);
return pic_caar(pic, v);
}
static pic_value
pic_pair_cadr(pic_state *pic)
{
pic_value v;
pic_get_args(pic, "o", &v);
return pic_cadr(pic, v);
}
static pic_value
pic_pair_cdar(pic_state *pic)
{
pic_value v;
pic_get_args(pic, "o", &v);
return pic_cdar(pic, v);
}
static pic_value
pic_pair_cddr(pic_state *pic)
{
pic_value v;
pic_get_args(pic, "o", &v);
return pic_cddr(pic, v);
}
static pic_value
pic_pair_set_car(pic_state *pic)
{
pic_value v,w;
pic_get_args(pic, "oo", &v, &w);
if (! pic_pair_p(v))
pic_error(pic, "pair expected");
pic_pair_ptr(v)->car = w;
return pic_none_value();
}
static pic_value
pic_pair_set_cdr(pic_state *pic)
{
pic_value v,w;
pic_get_args(pic, "oo", &v, &w);
if (! pic_pair_p(v))
pic_error(pic, "pair expected");
pic_pair_ptr(v)->cdr = w;
return pic_none_value();
}
static pic_value
pic_pair_null_p(pic_state *pic)
{
pic_value v;
pic_get_args(pic, "o", &v);
return pic_bool_value(pic_nil_p(v));
}
static pic_value
pic_pair_list_p(pic_state *pic)
{
pic_value v;
pic_get_args(pic, "o", &v);
return pic_bool_value(pic_list_p(v));
}
static pic_value
pic_pair_make_list(pic_state *pic)
{
int i;
pic_value fill = pic_none_value();
pic_get_args(pic, "i|o", &i, &fill);
return pic_make_list(pic, i, fill);
}
static pic_value
pic_pair_list(pic_state *pic)
{
size_t argc;
pic_value *argv;
pic_get_args(pic, "*", &argc, &argv);
return pic_list_by_array(pic, argc, argv);
}
static pic_value
pic_pair_length(pic_state *pic)
{
pic_value list;
pic_get_args(pic, "o", &list);
return pic_int_value(pic_length(pic, list));
}
static pic_value
pic_pair_append(pic_state *pic)
{
size_t argc;
pic_value *args, list;
pic_get_args(pic, "*", &argc, &args);
if (argc == 0) {
return pic_nil_value();
}
list = args[--argc];
while (argc-- > 0) {
list = pic_append(pic, args[argc], list);
}
return list;
}
static pic_value
pic_pair_reverse(pic_state *pic)
{
pic_value list;
pic_get_args(pic, "o", &list);
return pic_reverse(pic, list);
}
static pic_value
pic_pair_list_tail(pic_state *pic)
{
pic_value list;
int i;
pic_get_args(pic, "oi", &list, &i);
return pic_list_tail(pic, list, i);
}
static pic_value
pic_pair_list_ref(pic_state *pic)
{
pic_value list;
int i;
pic_get_args(pic, "oi", &list, &i);
return pic_list_ref(pic, list, i);
}
static pic_value
pic_pair_list_set(pic_state *pic)
{
pic_value list, obj;
int i;
pic_get_args(pic, "oio", &list, &i, &obj);
pic_list_set(pic, list, i, obj);
return pic_none_value();
}
static pic_value
pic_pair_list_copy(pic_state *pic)
{
pic_value obj;
pic_get_args(pic, "o", &obj);
return pic_list_copy(pic, obj);
}
static pic_value
pic_pair_memq(pic_state *pic)
{
pic_value key, list;
pic_get_args(pic, "oo", &key, &list);
return pic_memq(pic, key, list);
}
static pic_value
pic_pair_memv(pic_state *pic)
{
pic_value key, list;
pic_get_args(pic, "oo", &key, &list);
return pic_memv(pic, key, list);
}
static pic_value
pic_pair_member(pic_state *pic)
{
struct pic_proc *proc = NULL;
pic_value key, list;
pic_get_args(pic, "oo|l", &key, &list, &proc);
return pic_member(pic, key, list, proc);
}
static pic_value
pic_pair_assq(pic_state *pic)
{
pic_value key, list;
pic_get_args(pic, "oo", &key, &list);
return pic_assq(pic, key, list);
}
static pic_value
pic_pair_assv(pic_state *pic)
{
pic_value key, list;
pic_get_args(pic, "oo", &key, &list);
return pic_assv(pic, key, list);
}
static pic_value
pic_pair_assoc(pic_state *pic)
{
struct pic_proc *proc = NULL;
pic_value key, list;
pic_get_args(pic, "oo|l", &key, &list, &proc);
return pic_assoc(pic, key, list, proc);
}
void
pic_init_pair(pic_state *pic)
{
pic_defun(pic, "pair?", pic_pair_pair_p);
pic_defun(pic, "cons", pic_pair_cons);
pic_defun(pic, "car", pic_pair_car);
pic_defun(pic, "cdr", pic_pair_cdr);
pic_defun(pic, "set-car!", pic_pair_set_car);
pic_defun(pic, "set-cdr!", pic_pair_set_cdr);
pic_defun(pic, "null?", pic_pair_null_p);
pic_defun(pic, "caar", pic_pair_caar);
pic_defun(pic, "cadr", pic_pair_cadr);
pic_defun(pic, "cdar", pic_pair_cdar);
pic_defun(pic, "cddr", pic_pair_cddr);
pic_defun(pic, "list?", pic_pair_list_p);
pic_defun(pic, "make-list", pic_pair_make_list);
pic_defun(pic, "list", pic_pair_list);
pic_defun(pic, "length", pic_pair_length);
pic_defun(pic, "append", pic_pair_append);
pic_defun(pic, "reverse", pic_pair_reverse);
pic_defun(pic, "list-tail", pic_pair_list_tail);
pic_defun(pic, "list-ref", pic_pair_list_ref);
pic_defun(pic, "list-set!", pic_pair_list_set);
pic_defun(pic, "list-copy", pic_pair_list_copy);
pic_defun(pic, "memq", pic_pair_memq);
pic_defun(pic, "memv", pic_pair_memv);
pic_defun(pic, "member", pic_pair_member);
pic_defun(pic, "assq", pic_pair_assq);
pic_defun(pic, "assv", pic_pair_assv);
pic_defun(pic, "assoc", pic_pair_assoc);
}