/**
 * Forth stack operations
 *
 * Created on 2021/11/13.
 */

#ifndef FORTH_FH_STACK_H
#define FORTH_FH_STACK_H

enum fh_error ds_roll(struct fh_thread_s *fh, int n);

/** Peek n-th element of data stack */
enum fh_error ds_peek_n(struct fh_thread_s *fh, uint32_t *out, int n);
/** Peek n-th element of return stack */
enum fh_error rs_peek_n(struct fh_thread_s *fh, uint32_t *out, int n);
/** Peek n-th element of control stack */
enum fh_error cs_peek_n(struct fh_thread_s *fh, uint32_t *out, int n);

/** Peek top of data stack */
static inline enum fh_error ds_peek(struct fh_thread_s *fh, uint32_t *out)
{
  return ds_peek_n(fh, out, 0);
}

/** Peek top of return stack */
static inline enum fh_error rs_peek(struct fh_thread_s *fh, uint32_t *out)
{
  return rs_peek_n(fh, out, 0);
}

/** Peek top of control stack */
static inline enum fh_error cs_peek(struct fh_thread_s *fh, uint32_t *out)
{
  return cs_peek_n(fh, out, 0);
}

enum fh_error ds_pop(struct fh_thread_s *fh, uint32_t *out);
enum fh_error rs_pop(struct fh_thread_s *fh, uint32_t *out);
enum fh_error cs_pop(struct fh_thread_s *fh, uint32_t *out);

enum fh_error ds_push(struct fh_thread_s *fh, uint32_t in);
enum fh_error rs_push(struct fh_thread_s *fh, uint32_t in);
enum fh_error cs_push(struct fh_thread_s *fh, uint32_t in);

#endif //FORTH_FH_STACK_H