/*-
 * Copyright (c) 2003, 2004 Lev Walkin <vlm@lionet.info>. All rights reserved.
 * Redistribution and modifications are permitted subject to BSD license.
 */
#include <asn_internal.h>
#include <BIT_STRING.h>
#include <asn_internal.h>

/*
 * BIT STRING basic type description.
 */
static ber_tlv_tag_t asn_DEF_BIT_STRING_tags[] = {
	(ASN_TAG_CLASS_UNIVERSAL | (3 << 2))
};
static asn_OCTET_STRING_specifics_t asn_DEF_BIT_STRING_specs = {
	sizeof(BIT_STRING_t),
	offsetof(BIT_STRING_t, _asn_ctx),
	ASN_OSUBV_BIT
};
asn_TYPE_descriptor_t asn_DEF_BIT_STRING = {
	"BIT STRING",
	"BIT_STRING",
	OCTET_STRING_free,         /* Implemented in terms of OCTET STRING */
	0,
	BIT_STRING_constraint,
	OCTET_STRING_decode_ber,   /* Implemented in terms of OCTET STRING */
	OCTET_STRING_encode_der,   /* Implemented in terms of OCTET STRING */
	0,
	0,
	0,	/* Unaligned PER decoder */
	0,	/* Unaligned PER encoder */
	0, /* Use generic outmost tag fetcher */
	asn_DEF_BIT_STRING_tags,
	sizeof(asn_DEF_BIT_STRING_tags)
	  / sizeof(asn_DEF_BIT_STRING_tags[0]),
	asn_DEF_BIT_STRING_tags,	/* Same as above */
	sizeof(asn_DEF_BIT_STRING_tags)
	  / sizeof(asn_DEF_BIT_STRING_tags[0]),
	0,	/* No PER visible constraints */
	0, 0,	/* No members */
	&asn_DEF_BIT_STRING_specs
};

/*
 * BIT STRING generic constraint.
 */
int
BIT_STRING_constraint(asn_TYPE_descriptor_t *td, const void *sptr,
		asn_app_constraint_failed_f *ctfailcb, void *app_key) {
	const BIT_STRING_t *st = (const BIT_STRING_t *)sptr;

	if(st && st->buf) {
		if((st->size == 0 && st->bits_unused)
		|| st->bits_unused < 0 || st->bits_unused > 7) {
			_ASN_CTFAIL(app_key, td, sptr,
				"%s: invalid padding byte (%s:%d)",
				td->name, __FUNCTION__, __LINE__);
			return -1;
		}
	} else {
		_ASN_CTFAIL(app_key, td, sptr,
			"%s: value not given (%s:%d)",
			td->name, __FUNCTION__, __LINE__);
		return -1;
	}

	return 0;
}