cm_to_uint (arg))

#define SCM_NUM2ULONG(pos, arg) (scm_to_ulong (arg))

#define SCM_NUM2ULONG_DEF(pos, arg, def) \
  (SCM_UNBNDP (arg) ? def : scm_to_ulong (arg))

#define SCM_NUM2LONG(pos, arg) (scm_to_long (arg))

#define SCM_NUM2LONG_DEF(pos, arg, def) \
  (SCM_UNBNDP (arg) ? def : scm_to_long (arg))

#define SCM_NUM2LONG_LONG(pos, arg) (scm_to_long_long (arg))

#define SCM_NUM2LONG_LONG_DEF(pos, arg, def) \
  (SCM_UNBNDP (arg) ? def : scm_to_long_long (arg))

#define SCM_NUM2ULONG_LONG(pos, arg) (scm_to_ulong_long (arg))

#define SCM_NUM2ULONG_LONG_DEF(pos, arg, def) \
  (SCM_UNBNDP (arg) ? def : scm_to_ulong_long (arg))

#define SCM_NUM2SIZE(pos, arg) (scm_to_size_t (arg))

#define SCM_NUM2FLOAT(pos, arg) ((float) scm_to_double (arg))

#define SCM_NUM2DOUBLE(pos, arg) (scm_to_double (arg))

#define SCM_OUT_OF_RANGE(pos, arg) \
  do { scm_out_of_range_pos (FUNC_NAME, arg, scm_from_int (pos)); } while (0)

#define SCM_ASSERT_RANGE(pos, arg, f)					\
  do { if (SCM_UNLIKELY (!(f)))					\
         scm_out_of_range_pos (FUNC_NAME, arg, scm_from_int (pos)); }	\
  while (0)

#define SCM_VALIDATE_REAL(pos, z) SCM_MAKE_VALIDATE_MSG (pos, z, REALP, "real")

#define SCM_VALIDATE_NUMBER(pos, z) SCM_MAKE_VALIDATE_MSG (pos, z, NUMBERP, "number")

#define SCM_VALIDATE_USHORT_COPY(pos, k, cvar) \
  do { \
    cvar = SCM_NUM2USHORT (pos, k); \
  } while (0)

#define SCM_VALIDATE_SHORT_COPY(pos, k, cvar) \
  do { \
    cvar = SCM_NUM2SHORT (pos, k); \
  } while (0)

#define SCM_VALIDATE_UINT_COPY(pos, k, cvar) \
  do { \
    cvar = SCM_NUM2UINT (pos, k); \
  } while (0)

#define SCM_VALIDATE_INT_COPY(pos, k, cvar) \
  do { \
    cvar = SCM_NUM2INT (pos, k); \
  } while (0)

#define SCM_VALIDATE_ULONG_COPY(pos, k, cvar) \
  do { \
    cvar = SCM_NUM2ULONG (pos, k); \
  } while (0)

#define SCM_VALIDATE_LONG_COPY(pos, k, cvar) \
  do { \
    cvar = SCM_NUM2LONG (pos, k); \
  } while (0)

#define SCM_VALIDATE_SIZE_COPY(pos, k, cvar) \
  do { \
    cvar = SCM_NUM2SIZE (pos, k);              \
  } while (0)

#define SCM_VALIDATE_FLOAT_COPY(pos, k, cvar) \
  do { \
    cvar = SCM_NUM2FLOAT (pos, k); \
  } while (0)

#define SCM_VALIDATE_DOUBLE_COPY(pos, k, cvar) \
  do { \
    cvar = SCM_NUM2DOUBLE (pos, k); \
  } while (0)

#define SCM_VALIDATE_DOUBLE_DEF_COPY(pos, k, default, cvar) \
  do { \
    if (SCM_UNBNDP (k)) \
      { \
        k = scm_make_real (default); \
        cvar = default; \
      } \
    else \
      { \
        cvar = SCM_NUM2DOUBLE (pos, k); \
      } \
  } while (0)