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/*-
 * Copyright (c) 2003, 2006 Lev Walkin <vlm@lionet.info>. All rights reserved.
 * Redistribution and modifications are permitted subject to BSD license.
 */
#include <asn_internal.h>
#include <NumericString.h>

/*
 * NumericString basic type description.
 */
static ber_tlv_tag_t asn_DEF_NumericString_tags[] = {
	(ASN_TAG_CLASS_UNIVERSAL | (18 << 2)),	/* [UNIVERSAL 18] IMPLICIT ...*/
	(ASN_TAG_CLASS_UNIVERSAL | (4 << 2))	/* ... OCTET STRING */
};
static int asn_DEF_NumericString_v2c(unsigned int value) {
	switch(value) {
	case 0x20: return 0;
	case 0x30: case 0x31: case 0x32: case 0x33: case 0x34:
	case 0x35: case 0x36: case 0x37: case 0x38: case 0x39:
		return value - (0x30 - 1);
	}
	return -1;
}
static int asn_DEF_NumericString_c2v(unsigned int code) {
	if(code > 0) {
		if(code <= 10)
			return code + (0x30 - 1);
		else
			return -1;
	} else {
		return 0x20;
	}
}
static asn_per_constraints_t asn_DEF_NumericString_constraints = {
	{ APC_CONSTRAINED, 4, 4, 0x20, 0x39 },	/* Value */
	{ APC_SEMI_CONSTRAINED, -1, -1, 0, 0 },	/* Size */
	asn_DEF_NumericString_v2c,
	asn_DEF_NumericString_c2v
};
asn_TYPE_descriptor_t asn_DEF_NumericString = {
	"NumericString",
	"NumericString",
	OCTET_STRING_free,
	OCTET_STRING_print_utf8,   /* ASCII subset */
	NumericString_constraint,
	OCTET_STRING_decode_ber,    /* Implemented in terms of OCTET STRING */
	OCTET_STRING_encode_der,
	OCTET_STRING_decode_xer_utf8,
	OCTET_STRING_encode_xer_utf8,
	OCTET_STRING_decode_uper,
	OCTET_STRING_encode_uper,
	0, /* Use generic outmost tag fetcher */
	asn_DEF_NumericString_tags,
	sizeof(asn_DEF_NumericString_tags)
	  / sizeof(asn_DEF_NumericString_tags[0]) - 1,
	asn_DEF_NumericString_tags,
	sizeof(asn_DEF_NumericString_tags)
	  / sizeof(asn_DEF_NumericString_tags[0]),
	&asn_DEF_NumericString_constraints,
	0, 0,	/* No members */
	0	/* No specifics */
};

int
NumericString_constraint(asn_TYPE_descriptor_t *td, const void *sptr,
		asn_app_constraint_failed_f *ctfailcb, void *app_key) {
	const NumericString_t *st = (const NumericString_t *)sptr;

	if(st && st->buf) {
		uint8_t *buf = st->buf;
		uint8_t *end = buf + st->size;

		/*
		 * Check the alphabet of the NumericString.
		 * ASN.1:1984 (X.409)
		 */
		for(; buf < end; buf++) {
			switch(*buf) {
			case 0x20:
			case 0x30: case 0x31: case 0x32: case 0x33: case 0x34:
			case 0x35: case 0x36: case 0x37: case 0x38: case 0x39:
				continue;
			}
			_ASN_CTFAIL(app_key, td, sptr,
				"%s: value byte %ld (%d) "
				"not in NumericString alphabet (%s:%d)",
				td->name,
				(long)((buf - st->buf) + 1),
				*buf,
				__FILE__, __LINE__);
			return -1;
		}
	} else {
		_ASN_CTFAIL(app_key, td, sptr,
			"%s: value not given (%s:%d)",
			td->name, __FILE__, __LINE__);
		return -1;
	}

	return 0;
}