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* Copyright (c) 2003, 2004 Lev Walkin <vlm@lionet.info>. All rights reserved.
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* Redistribution and modifications are permitted subject to BSD license.
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#include <asn_internal.h>
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#include <UTF8String.h>
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* UTF8String basic type description.
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static ber_tlv_tag_t asn_DEF_UTF8String_tags[] = {
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(ASN_TAG_CLASS_UNIVERSAL | (12 << 2)), /* [UNIVERSAL 12] IMPLICIT ...*/
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(ASN_TAG_CLASS_UNIVERSAL | (4 << 2)), /* ... OCTET STRING */
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asn_TYPE_descriptor_t asn_DEF_UTF8String = {
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UTF8String_constraint, /* Check for invalid codes, etc. */
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OCTET_STRING_decode_ber, /* Implemented in terms of OCTET STRING */
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OCTET_STRING_encode_der,
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OCTET_STRING_decode_xer_utf8,
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OCTET_STRING_encode_xer_utf8,
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0, /* Use generic outmost tag fetcher */
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asn_DEF_UTF8String_tags,
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sizeof(asn_DEF_UTF8String_tags)
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/ sizeof(asn_DEF_UTF8String_tags[0]) - 1,
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asn_DEF_UTF8String_tags,
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sizeof(asn_DEF_UTF8String_tags)
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/ sizeof(asn_DEF_UTF8String_tags[0]),
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0, 0, /* No members */
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* This is the table of length expectations.
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* The second half of this table is only applicable to the long sequences.
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static int UTF8String_ht[2][16] = {
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1, 1, 1, 1, 1, 1, 1, 1,
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/* 1000..1011(0), 1100..1101(2), 1110(3), 1111(-1) */
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0, 0, 0, 0, 2, 2, 3, -1 },
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/* 11110000..11110111 */
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4, 4, 4, 4, 4, 4, 4, 4,
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5, 5, 5, 5, 6, 6, -1, -1 }
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static int32_t UTF8String_mv[7] = { 0, 0,
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/* Internal aliases for return codes */
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#define U8E_TRUNC -1 /* UTF-8 sequence truncated */
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#define U8E_ILLSTART -2 /* Illegal UTF-8 sequence start */
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#define U8E_NOTCONT -3 /* Continuation expectation failed */
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#define U8E_NOTMIN -4 /* Not minimal length encoding */
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#define U8E_EINVAL -5 /* Invalid arguments */
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UTF8String_constraint(asn_TYPE_descriptor_t *td, const void *sptr,
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asn_app_consume_bytes_f *app_errlog, void *app_key) {
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ssize_t len = UTF8String_length((const UTF8String_t *)sptr);
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_ASN_ERRLOG(app_errlog, app_key,
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"%s: value not given", td->name);
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_ASN_ERRLOG(app_errlog, app_key,
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"%s: truncated UTF-8 sequence (%s:%d)",
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td->name, __FILE__, __LINE__);
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_ASN_ERRLOG(app_errlog, app_key,
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"%s: UTF-8 illegal start of encoding (%s:%d)",
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td->name, __FILE__, __LINE__);
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_ASN_ERRLOG(app_errlog, app_key,
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"%s: UTF-8 not continuation (%s:%d)",
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td->name, __FILE__, __LINE__);
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_ASN_ERRLOG(app_errlog, app_key,
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"%s: UTF-8 not minimal sequence (%s:%d)",
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td->name, __FILE__, __LINE__);
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return (len < 0) ? -1 : 0;
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UTF8String__process(const UTF8String_t *st, uint32_t *dst, size_t dstlen) {
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uint8_t *buf = st->buf;
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uint8_t *end = buf + st->size;
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for(length = 0; buf < end; length++) {
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/* Compute the sequence length */
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want = UTF8String_ht[0][ch >> 4];
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/* Second half of the table, long sequence */
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want = UTF8String_ht[1][ch & 0x0F];
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if(want != -1) break;
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/* assert(want >= 1 && want <= 6) */
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/* Check character sequence length */
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if(buf + want > end) return U8E_TRUNC;
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value = ch & (0xff >> (want + 1));
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for(buf++; buf < cend; buf++) {
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if(ch < 0x80 || ch > 0xbf) return U8E_NOTCONT;
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value = (value << 6) | (ch & 0x3F);
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if(value < UTF8String_mv[want])
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if(dstlen) *dst++ = value; /* Record value */
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if(dstlen) *dst = 0; /* zero-terminate */
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UTF8String_length(const UTF8String_t *st) {
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return UTF8String__process(st, 0, 0);
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UTF8String_to_wcs(const UTF8String_t *st, uint32_t *dst, size_t dstlen) {
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ssize_t ret = UTF8String__process(st, dst, dstlen);
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return (ret < 0) ? 0 : ret;
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UTF8String_print(asn_TYPE_descriptor_t *td, const void *sptr, int ilevel,
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asn_app_consume_bytes_f *cb, void *app_key) {
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const UTF8String_t *st = (const UTF8String_t *)sptr;
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(void)td; /* Unused argument */
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(void)ilevel; /* Unused argument */
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return (cb(st->buf, st->size, app_key) < 0) ? -1 : 0;
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return (cb("<absent>", 8, app_key) < 0) ? -1 : 0;