177 lines
6.8 KiB
C
177 lines
6.8 KiB
C
/*-
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* Copyright (c) 2003, 2006 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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*/
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#include <asn_internal.h>
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#include <TeletexString.h>
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/*
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* TeletexString basic type description.
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*/
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static const ber_tlv_tag_t asn_DEF_TeletexString_tags[] = {
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(ASN_TAG_CLASS_UNIVERSAL | (20 << 2)), /* [UNIVERSAL 20] IMPLICIT ...*/
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(ASN_TAG_CLASS_UNIVERSAL | (4 << 2)), /* ... OCTET STRING */
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};
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asn_TYPE_descriptor_t asn_DEF_TeletexString = {
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"TeletexString",
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"TeletexString",
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OCTET_STRING_free,
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OCTET_STRING_print, /* non-ascii string */
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asn_generic_unknown_constraint,
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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_hex,
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OCTET_STRING_encode_xer,
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OCTET_STRING_decode_uper,
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OCTET_STRING_encode_uper,
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OCTET_STRING_decode_aper,
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OCTET_STRING_encode_aper,
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0, /* Use generic outmost tag fetcher */
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asn_DEF_TeletexString_tags,
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sizeof(asn_DEF_TeletexString_tags)
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/ sizeof(asn_DEF_TeletexString_tags[0]) - 1,
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asn_DEF_TeletexString_tags,
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sizeof(asn_DEF_TeletexString_tags)
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/ sizeof(asn_DEF_TeletexString_tags[0]),
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0, /* No PER visible constraints */
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0, 0, /* No members */
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0 /* No specifics */
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};
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/*
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* Here is a formal attempt at creating a mapping from TeletexString
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* (T61String) of the latest ASN.1 standard (X.680:2002) into the Unicode
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* character set. -- Lev Walkin <vlm@lionet.info>
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*
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* The first thing to keep in mind is that TeletexString (T61String)
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* is defined in ASN.1, and is not really a T.61 string.
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* The T.61 standard is withdrawn by ITU-T and is no longer an authoritative
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* reference. See http://www.itu.int/rec/T-REC-T.61
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*
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* The X.680 specifies TeletexString (T61String) as a combination of the
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* character sets specified by the registration numbers listed in
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* ISO International Register of Coded Character Sets to be used with
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* Escape Sequences (ISO-2375):
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* 6, 87, 102, 103, 106, 107, 126, 144, 150, 153, 156, 164, 165, 168,
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* plus SPACE and DELETE characters.
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* In addition to that, the X.680 Table 6 NOTE 2 allows using register entries
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* 6 and 156 instead of 102 and 103.
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*
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* The ISO Register itself is available at http://www.itscj.ipsj.or.jp/ISO-IR/
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*
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* #6 is ASCII. http://www.itscj.ipsj.or.jp/ISO-IR/006.pdf
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* Escapes into:
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* G0: ESC 2/8 4/2 ("(B")
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* G1: ESC 2/9 4/2 (")B")
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* The range is [0x21 .. 0x7e]. Conversion into Unicode
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* is simple, because it has one-to-one correspondence.
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* #87 is a "Japanese Graphic Character Set for Information Interchange".
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* Is a multiple-byte set of 6877 characters.
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* The character set is JIS X 0208-1983 (originally JIS C 6226-1983).
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* Escapes into:
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* G0: ESC 2/4 4/2 ("$B")
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* G1: ESC 2/4 2/9 4/2 ("$)B")
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* G2: ESC 2/4 2/10 4/2 ("$*B")
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* G3: ESC 2/4 2/11 4/2 ("$+B")
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* #102 is "Teletex Primary Set of Graphic Characters" and is almost ASCII.
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* Escapes into:
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* G0: ESC 2/8 7/5 ("(u")
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* G1: ESC 2/9 7/5 (")u")
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* G2: ESC 2/10 7/5 ("*u")
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* G3: ESC 2/11 7/5 ("+u")
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* It is almost identical to ASCII, except for ASCII position for '$'
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* (DOLLAR SIGN) is filled with '¤' (CURRENCY SIGN), which is U+00A4.
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* Also, ASCII positions for '`', '\', '^', '{', '}', '~' are marked
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* as "should not be used".
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* #103 is a supplementary set of characters used in combination with #102.
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* Escapes into:
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* G0: ESC 2/8 7/6 ("(v")
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* G1: ESC 2/9 7/6 (")v")
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* G2: ESC 2/10 7/6 ("*v")
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* G3: ESC 2/11 7/6 ("+v")
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* Some characters in that character set are combining characters,
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* which can only be restrictively used with certain basic Latin letters.
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* It can be thought of as a subset of #156 with the exception of 4/12
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* which is UNDERLINE in #103 and absent in #156.
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* #106 is a primary set of control functions, used in combination with #107.
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* Escapes into:
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* C0: ESC 2/1 4/5 ("!E")
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* This set is so short I can list it here:
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* 0x08 BS BACKSPACE -- same as Unicode
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* 0x0a LF LINE FEED -- same as Unicode
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* 0x0c FF FORM FEED -- same as Unicode
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* 0x0d CR CARRIAGE RETURN -- same as Unicode
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* 0x0e LS1 LOCKING SHIFT ONE
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* 0x0f LS0 LOCKING SHIFT ZERO
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* 0x19 SS2 SINGLE SHIFT TWO
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* 0x1a SUB SUBSTITUTE CHARACTER
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* 0x1b ESC ESCAPE -- same as Unicode
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* 0x1d SS3 SINGLE SHIFT THREE
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* The LS1 and LS0 are two magical functions which, respectively, invoke
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* the currently designated G1 or G0 set into positions 2/1 to 7/14
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* The SS2 and SS3, respectively, invoke one character of the
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* currently designated set G2 and G3.
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* The SUB is wholly equivalent to U+001a (SUBSTITUTE)
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* #107 is a supplementary set of control functions, used with #106.
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* Escapes into:
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* C1: ESC 2/2 4/8 ('"H')
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* This set contains three special control codes:
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* 0x8b PLD PARTIAL LINE DOWN -- similar to <SUB>
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* 0x8c PLU PARTIAL LINE UP -- sumilar to <SUP>
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* 0x9b CSI CONTROL SEQUENCE INTRODUCER
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* This set is so out of world we can probably safely ignore it.
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* #126 is a "Right-hand Part of the Latin/Greek Alphabet".
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* Comprises of 90 characters, including accented letters.
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* Escapes into:
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* G1: ESC 2/13 4/6 ("-F")
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* G2: ESC 2/14 4/6 (".F")
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* G3: ESC 2/15 4/6 ("/F")
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* Note: This Registration is a subset of ISO-IR 227.
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* #144 is a "Cyrillic part of the Latin/Cyrillic Alphabet".
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* Comprises of 95 characters.
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* Escapes into:
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* G1: ESC 2/13 4/12 ("-L")
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* G2: ESC 2/14 4/12 (".L")
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* G3: ESC 2/15 4/12 ("/L")
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* #150 is a "Greek Primary Set of Graphic Characters".
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* Comprises of 94 characters.
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* Escapes into:
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* G0: ESC 2/8 2/1 4/0 ("(!@")
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* G1: ESC 2/9 2/1 4/0 (")!@")
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* G2: ESC 2/10 2/1 4/0 ("*!@")
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* G3: ESC 2/11 2/1 4/0 ("+!@")
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* #153 is a "Basic Cyrillic Character Set for 8-bit codes".
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* Comprises of 68 characters.
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* Escapes into:
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* G1: ESC 2/13 4/15 ("-O")
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* G2: ESC 2/14 4/15 (".O")
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* G3: ESC 2/15 4/15 ("/O")
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* #156 is a "Supplementary Set of ISO/IEC 6937:1992" for use with #6
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* Comprises of 87 characters.
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* Escapes into:
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* G1: ESC 2/13 5/2 ("-R")
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* G2: ESC 2/14 5/2 (".R")
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* G3: ESC 2/15 5/2 ("/R")
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* #164 is a "Hebrew Supplementary Set of Graphic Characters"
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* Comprises of 27 characters.
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* Escapes into:
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* G1: ESC 2/13 5/3 ("-S")
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* G2: ESC 2/14 5/3 (".S")
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* G3: ESC 2/15 5/3 ("/S")
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* #165 is a set of "Codes of the Chinese graphic character set"
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* Is a multiple-byte set of 8446 characters.
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* Escapes into:
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* G0: ESC 2/4 2/8 4/5 ("$(E")
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* G1: ESC 2/4 2/9 4/5 ("$)E")
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* G2: ESC 2/4 2/10 4/5 ("$*E")
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* G3: ESC 2/4 2/11 4/5 ("$+E")
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* #168 is a "Japanese Graphic Character Set for Information Interchange"
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* A multiple-byte set of 6879 characters updated from #87.
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* Escapes into:
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* G0: ESC 2/6 4/0 ESC 2/4 4/2 ("&@" "$B")
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* G1: ESC 2/6 4/0 ESC 2/4 2/9 4/2 ("&@" "$)B")
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* G2: ESC 2/6 4/0 ESC 2/4 2/10 4/2 ("&@" "$*B")
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* G3: ESC 2/6 4/0 ESC 2/4 2/11 4/2 ("&@" "$+B")
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*/
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