/*! \brief Get a page from a smob.
* \ingroup guile_c_iface
* \par Function Description
* Return the #PAGE represented by \a smob.
*
* \param [in] smob Guile value to retrieve #PAGE from.
* \return the #PAGE represented by \a smob.
*/
PAGE *
edascm_to_page (SCM smob)
{
#ifndef NDEBUG
SCM_ASSERT (EDASCM_PAGEP (smob), smob,
SCM_ARG1, "edascm_to_page");
#endif
EDASCM_ASSERT_SMOB_VALID (smob);
return (PAGE *) SCM_SMOB_DATA (smob);
}
/*! \brief Get a smob for a page.
* \ingroup guile_c_iface
* \par Function Description
* Create a new smob representing \a page.
*
* \param page #PAGE to create a smob for.
* \return a smob representing \a page.
*/
SCM
edascm_from_page (PAGE *page)
{
SCM smob = smob_cache_lookup (page);
if (EDASCM_PAGEP (smob)) {
return smob;
}
SCM_NEWSMOB (smob, geda_smob_tag, page);
SCM_SET_SMOB_FLAGS (smob, GEDA_SMOB_PAGE);
/* Set weak reference */
s_page_weak_ref (page, smob_weakref_notify,
unpack_as_pointer (smob));
smob_cache_add (page, smob);
return smob;
}
/*! \brief Test whether a smob is a #PAGE instance
* \ingroup guile_c_iface
* \par Function Description
* If \a smob is a #PAGE instance, returns non-zero. Otherwise,
* returns zero.
*
* \param [in] smob Guile value to test.
*
* \return non-zero iff \a smob is a #PAGE instance.
*/
int
edascm_is_page (SCM smob)
{
return EDASCM_PAGEP (smob);
}