#pragma once

#include "../../runtime/gc.h"
#include "runtime_externs.h"
#include "types.h"
#include "utils.h"

#include "stdlib.h"

void **s_top(struct State *s);
bool s_is_empty(struct State *s);
void **s_nth(struct State *s, aint n);
void **s_peek(struct State *s);
aint *s_peek_i(struct State *s);

void s_push(struct State *s, void *val);
void s_push_i(struct State *s, aint val);
void s_push_nil(struct State *s);
void s_pushn_nil(struct State *s, size_t n);

void *s_pop(struct State *s);
aint s_pop_i(struct State *s);
void s_popn(struct State *s, size_t n);

// ------ functions ------

// |> param_0 ... param_n | frame[ ret rp prev_fp &params &locals &end
// ]
// |> local_0 ... local_m |> | ...
//
// where |> defines corresponding frame pointer, | is stack pointer
// location before / after new frame added
void s_enter_f(struct State *s, char *rp, bool is_closure_call, auint args_sz,
               auint locals_sz);

void s_exit_f(struct State *s);

// ---- category ---

void **var_by_category(struct State *s, enum VarCategory category, int id);