#ifndef SCM_VALUES_H
#define SCM_VALUES_H

/* Copyright 2000-2001,2006,2008,2012,2018,2025
     Free Software Foundation, Inc.

   This file is part of Guile.

   Guile is free software: you can redistribute it and/or modify it
   under the terms of the GNU Lesser General Public License as published
   by the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.

   Guile is distributed in the hope that it will be useful, but WITHOUT
   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
   License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with Guile.  If not, see
   <https://www.gnu.org/licenses/>.  */



#include "libguile/gc.h"

static inline int
scm_is_values (SCM x)
{
  return SCM_HAS_TYP7 (x, scm_tc7_values);
}

#ifdef BUILDING_LIBGUILE
struct scm_values
{
  scm_t_bits tag_and_count;
  SCM values[];
};

static inline struct scm_values*
scm_to_values (SCM x)
{
  if (!scm_is_values (x))
    abort ();
  return (struct scm_values*) SCM_UNPACK_POINTER (x);
}

static inline SCM
scm_from_values (struct scm_values *values)
{
  return SCM_PACK_POINTER (values);
}

static inline size_t
scm_values_count (struct scm_values *x)
{
  return x->tag_and_count >> 8;
}

static inline SCM
scm_values_ref (struct scm_values *values, size_t n)
{
  return values->values[n];
}
#endif

#define SCM_VALUESP(x) (scm_is_values (x))

SCM_INTERNAL void scm_values_extract_2 (SCM obj, SCM *p1, SCM *p2);

SCM_API SCM scm_values (SCM args);
SCM_API SCM scm_c_values (SCM *base, size_t n);
SCM_API SCM scm_values_2 (SCM a, SCM b);
SCM_API SCM scm_values_3 (SCM a, SCM b, SCM c);
SCM_API size_t scm_c_nvalues (SCM obj);
SCM_API SCM scm_c_value_ref (SCM obj, size_t idx);
SCM_INTERNAL void scm_init_values (void);

#endif  /* SCM_VALUES_H */