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

/*
 * VisibleString basic type description.
 */
static ber_tlv_tag_t asn1_DEF_VisibleString_tags[] = {
	(ASN_TAG_CLASS_UNIVERSAL | (26 << 2))
};
asn1_TYPE_descriptor_t asn1_DEF_VisibleString = {
	"VisibleString",
	VisibleString_constraint,
	OCTET_STRING_decode_ber,    /* Implemented in terms of OCTET STRING */
	OCTET_STRING_encode_der,    /* Implemented in terms of OCTET STRING */
	OCTET_STRING_print_ascii,   /* ASCII subset */
	OCTET_STRING_free,
	0, /* Use generic outmost tag fetcher */
	asn1_DEF_VisibleString_tags,
	sizeof(asn1_DEF_VisibleString_tags)
	  / sizeof(asn1_DEF_VisibleString_tags[0]),
	1,	/* Single UNIVERSAL tag may be implicitly overriden */
	-1,	/* Both ways are fine */
	0	/* No specifics */
};


/*
 * ISO646, ISOReg#6
 */
static int _VisibleString_alphabet[256] = {
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 	/*   ! " # $ % & ' */
0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 	/* ( ) * + , - . / */
0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 	/* 0 1 2 3 4 5 6 7 */
0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20, 	/* 8 9 : ; < = > ? */
0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 	/* @ A B C D E F G */
0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, 0x30, 	/* H I J K L M N O */
0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 	/* P Q R S T U V W */
0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, 0x40, 	/* X Y Z [ \ ] ^ _ */
0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 	/* ` a b c d e f g */
0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, 0x50, 	/* h i j k l m n o */
0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 	/* p q r s t u v w */
0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, 0x00, 	/* x y z { | } ~   */
};

int
VisibleString_constraint(asn1_TYPE_descriptor_t *td, const void *sptr,
		asn_app_consume_bytes_f *app_errlog, void *app_key) {
	const VisibleString_t *st = sptr;

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

		/*
		 * Check the alphabet of the VisibleString.
		 * ISO646, ISOReg#6
		 */
		for(; buf < end; buf++) {
			if(!_VisibleString_alphabet[*buf]) {
				_ASN_ERRLOG("%s: value byte %d "
					"not in VisibleString alphabet (%d)",
					td->name,
					(buf - st->buf) + 1,
					*buf
				);
				return -1;
			}
		}
	} else {
		_ASN_ERRLOG("%s: value not given", td->name);
		return -1;
	}

	return 0;
}