| /*- |
| * 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 <UTF8String.h> |
| |
| /* |
| * UTF8String basic type description. |
| */ |
| static ber_tlv_tag_t asn_DEF_UTF8String_tags[] = { |
| (ASN_TAG_CLASS_UNIVERSAL | (12 << 2)), /* [UNIVERSAL 12] IMPLICIT ...*/ |
| (ASN_TAG_CLASS_UNIVERSAL | (4 << 2)), /* ... OCTET STRING */ |
| }; |
| asn_TYPE_descriptor_t asn_DEF_UTF8String = { |
| "UTF8String", |
| "UTF8String", |
| OCTET_STRING_free, |
| UTF8String_print, |
| UTF8String_constraint, /* Check for invalid codes, etc. */ |
| OCTET_STRING_decode_ber, /* Implemented in terms of OCTET STRING */ |
| OCTET_STRING_encode_der, |
| OCTET_STRING_decode_xer_utf8, |
| OCTET_STRING_encode_xer_utf8, |
| 0, /* Use generic outmost tag fetcher */ |
| asn_DEF_UTF8String_tags, |
| sizeof(asn_DEF_UTF8String_tags) |
| / sizeof(asn_DEF_UTF8String_tags[0]) - 1, |
| asn_DEF_UTF8String_tags, |
| sizeof(asn_DEF_UTF8String_tags) |
| / sizeof(asn_DEF_UTF8String_tags[0]), |
| 0, 0, /* No members */ |
| 0 /* No specifics */ |
| }; |
| |
| /* |
| * This is the table of length expectations. |
| * The second half of this table is only applicable to the long sequentes. |
| */ |
| static int UTF8String_ht[2][16] = { |
| { /* 0x0 ... 0x7 */ |
| /* 0000..0111 */ |
| 1, 1, 1, 1, 1, 1, 1, 1, |
| /* 1000..1011(0), 1100..1101(2), 1110(3), 1111(-1) */ |
| 0, 0, 0, 0, 2, 2, 3, -1 }, |
| { /* 0xF0 .. 0xF7 */ |
| /* 11110000..11110111 */ |
| 4, 4, 4, 4, 4, 4, 4, 4, |
| 5, 5, 5, 5, 6, 6, -1, -1 } |
| }; |
| static int32_t UTF8String_mv[7] = { 0, 0, |
| 0x00000080, |
| 0x00000800, |
| 0x00010000, |
| 0x00200000, |
| 0x04000000 |
| }; |
| |
| /* Internal aliases for return codes */ |
| #define U8E_TRUNC -1 /* UTF-8 sequence truncated */ |
| #define U8E_ILLSTART -2 /* Illegal UTF-8 sequence start */ |
| #define U8E_NOTCONT -3 /* Continuation expectation failed */ |
| #define U8E_NOTMIN -4 /* Not minimal length encoding */ |
| #define U8E_EINVAL -5 /* Invalid arguments */ |
| |
| int |
| UTF8String_constraint(asn_TYPE_descriptor_t *td, const void *sptr, |
| asn_app_consume_bytes_f *app_errlog, void *app_key) { |
| ssize_t len = UTF8String_length((const UTF8String_t *)sptr); |
| switch(len) { |
| case U8E_EINVAL: |
| _ASN_ERRLOG(app_errlog, app_key, |
| "%s: value not given", td->name); |
| break; |
| case U8E_TRUNC: |
| _ASN_ERRLOG(app_errlog, app_key, |
| "%s: truncated UTF-8 sequence (%s:%d)", |
| td->name, __FILE__, __LINE__); |
| break; |
| case U8E_ILLSTART: |
| _ASN_ERRLOG(app_errlog, app_key, |
| "%s: UTF-8 illegal start of encoding (%s:%d)", |
| td->name, __FILE__, __LINE__); |
| break; |
| case U8E_NOTCONT: |
| _ASN_ERRLOG(app_errlog, app_key, |
| "%s: UTF-8 not continuation (%s:%d)", |
| td->name, __FILE__, __LINE__); |
| break; |
| case U8E_NOTMIN: |
| _ASN_ERRLOG(app_errlog, app_key, |
| "%s: UTF-8 not minimal sequence (%s:%d)", |
| td->name, __FILE__, __LINE__); |
| break; |
| } |
| return (len < 0) ? -1 : 0; |
| } |
| |
| static ssize_t |
| UTF8String__process(const UTF8String_t *st, uint32_t *dst, size_t dstlen) { |
| size_t length; |
| uint8_t *buf = st->buf; |
| uint8_t *end = buf + st->size; |
| |
| for(length = 0; buf < end; length++) { |
| int ch = *buf; |
| uint8_t *cend; |
| int32_t value; |
| int want; |
| |
| /* Compute the sequence length */ |
| want = UTF8String_ht[0][ch >> 4]; |
| switch(want) { |
| case -1: |
| /* Second half of the table, long sequence */ |
| want = UTF8String_ht[1][ch & 0x0F]; |
| if(want != -1) break; |
| /* Fall through */ |
| case 0: |
| return U8E_ILLSTART; |
| } |
| |
| /* assert(want >= 1 && want <= 6) */ |
| |
| /* Check character sequence length */ |
| if(buf + want > end) return U8E_TRUNC; |
| |
| value = ch & (0xff >> (want + 1)); |
| cend = buf + want; |
| for(buf++; buf < cend; buf++) { |
| ch = *buf; |
| if(ch < 0x80 || ch > 0xbf) return U8E_NOTCONT; |
| value = (value << 6) | (ch & 0x3F); |
| } |
| if(value < UTF8String_mv[want]) |
| return U8E_NOTMIN; |
| if(dstlen) *dst++ = value; /* Record value */ |
| } |
| |
| if(dstlen) *dst = 0; /* zero-terminate */ |
| |
| return length; |
| } |
| |
| |
| ssize_t |
| UTF8String_length(const UTF8String_t *st) { |
| if(st && st->buf) { |
| return UTF8String__process(st, 0, 0); |
| } else { |
| return U8E_EINVAL; |
| } |
| } |
| |
| size_t |
| UTF8String_to_wcs(const UTF8String_t *st, uint32_t *dst, size_t dstlen) { |
| if(st && st->buf) { |
| ssize_t ret = UTF8String__process(st, dst, dstlen); |
| return (ret < 0) ? 0 : ret; |
| } else { |
| return 0; |
| } |
| } |
| |
| int |
| UTF8String_print(asn_TYPE_descriptor_t *td, const void *sptr, int ilevel, |
| asn_app_consume_bytes_f *cb, void *app_key) { |
| const UTF8String_t *st = (const UTF8String_t *)sptr; |
| |
| (void)td; /* Unused argument */ |
| (void)ilevel; /* Unused argument */ |
| |
| if(st && st->buf) { |
| return (cb(st->buf, st->size, app_key) < 0) ? -1 : 0; |
| } else { |
| return (cb("<absent>", 8, app_key) < 0) ? -1 : 0; |
| } |
| } |