diff options
Diffstat (limited to 'src/TeletexString.c')
| -rw-r--r-- | src/TeletexString.c | 141 |
1 files changed, 139 insertions, 2 deletions
diff --git a/src/TeletexString.c b/src/TeletexString.c index b96cb3b..cc2acad 100644 --- a/src/TeletexString.c +++ b/src/TeletexString.c @@ -1,5 +1,5 @@ /*- - * Copyright (c) 2003 Lev Walkin <vlm@lionet.info>. All rights reserved. + * 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> @@ -22,7 +22,8 @@ asn_TYPE_descriptor_t asn_DEF_TeletexString = { OCTET_STRING_encode_der, OCTET_STRING_decode_xer_hex, OCTET_STRING_encode_xer, - 0, 0, + OCTET_STRING_decode_uper, + OCTET_STRING_encode_uper, 0, /* Use generic outmost tag fetcher */ asn_DEF_TeletexString_tags, sizeof(asn_DEF_TeletexString_tags) @@ -35,3 +36,139 @@ asn_TYPE_descriptor_t asn_DEF_TeletexString = { 0 /* No specifics */ }; +/* + * Here is a formal attempt at creating a mapping from TeletexString + * (T61String) of the latest ASN.1 standard (X.680:2002) into the Unicode + * character set. -- Lev Walkin <vlm@lionet.info> + * + * The first thing to keep in mind is that TeletexString (T61String) + * is defined in ASN.1, and is not really a T.61 string. + * The T.61 standard is withdrawn by ITU-T and is no longer an authoritative + * reference. See http://www.itu.int/rec/T-REC-T.61 + * + * The X.680 specifies TeletexString (T61String) as a combination of the + * character sets specified by the registration numbers listed in + * ISO International Register of Coded Character Sets to be used with + * Escape Sequences (ISO-2375): + * 6, 87, 102, 103, 106, 107, 126, 144, 150, 153, 156, 164, 165, 168, + * plus SPACE and DELETE characters. + * In addition to that, the X.680 Table 6 NOTE 2 allows using register entries + * 6 and 156 instead of 102 and 103. + * + * The ISO Register itself is available at http://www.itscj.ipsj.or.jp/ISO-IR/ + * + * #6 is ASCII. http://www.itscj.ipsj.or.jp/ISO-IR/006.pdf + * Escapes into: + * G0: ESC 2/8 4/2 ("(B") + * G1: ESC 2/9 4/2 (")B") + * The range is [0x21 .. 0x7e]. Conversion into Unicode + * is simple, because it has one-to-one correspondence. + * #87 is a "Japanese Graphic Character Set for Information Interchange". + * Is a multiple-byte set of 6877 characters. + * The character set is JIS X 0208-1983 (originally JIS C 6226-1983). + * Escapes into: + * G0: ESC 2/4 4/2 ("$B") + * G1: ESC 2/4 2/9 4/2 ("$)B") + * G2: ESC 2/4 2/10 4/2 ("$*B") + * G3: ESC 2/4 2/11 4/2 ("$+B") + * #102 is "Teletex Primary Set of Graphic Characters" and is almost ASCII. + * Escapes into: + * G0: ESC 2/8 7/5 ("(u") + * G1: ESC 2/9 7/5 (")u") + * G2: ESC 2/10 7/5 ("*u") + * G3: ESC 2/11 7/5 ("+u") + * It is almost identical to ASCII, except for ASCII position for '$' + * (DOLLAR SIGN) is filled with 'ยค' (CURRENCY SIGN), which is U+00A4. + * Also, ASCII positions for '`', '\', '^', '{', '}', '~' are marked + * as "should not be used". + * #103 is a supplementary set of characters used in combination with #102. + * Escapes into: + * G0: ESC 2/8 7/6 ("(v") + * G1: ESC 2/9 7/6 (")v") + * G2: ESC 2/10 7/6 ("*v") + * G3: ESC 2/11 7/6 ("+v") + * Some characters in that character set are combining characters, + * which can only be restrictively used with certain basic Latin letters. + * It can be thought of as a subset of #156 with the exception of 4/12 + * which is UNDERLINE in #103 and absent in #156. + * #106 is a primary set of control functions, used in combination with #107. + * Escapes into: + * C0: ESC 2/1 4/5 ("!E") + * This set is so short I can list it here: + * 0x08 BS BACKSPACE -- same as Unicode + * 0x0a LF LINE FEED -- same as Unicode + * 0x0c FF FORM FEED -- same as Unicode + * 0x0d CR CARRIAGE RETURN -- same as Unicode + * 0x0e LS1 LOCKING SHIFT ONE + * 0x0f LS0 LOCKING SHIFT ZERO + * 0x19 SS2 SINGLE SHIFT TWO + * 0x1a SUB SUBSTITUTE CHARACTER + * 0x1b ESC ESCAPE -- same as Unicode + * 0x1d SS3 SINGLE SHIFT THREE + * The LS1 and LS0 are two magical functions which, respectively, invoke + * the currently designated G1 or G0 set into positions 2/1 to 7/14 + * The SS2 and SS3, respectively, invoke one character of the + * currently designated set G2 and G3. + * The SUB is wholly equivalent to U+001a (SUBSTITUTE) + * #107 is a supplementary set of control functions, used with #106. + * Escapes into: + * C1: ESC 2/2 4/8 ('"H') + * This set contains three special control codes: + * 0x8b PLD PARTIAL LINE DOWN -- similar to <SUB> + * 0x8c PLU PARTIAL LINE UP -- sumilar to <SUP> + * 0x9b CSI CONTROL SEQUENCE INTRODUCER + * This set is so out of world we can probably safely ignore it. + * #126 is a "Right-hand Part of the Latin/Greek Alphabet". + * Comprises of 90 characters, including accented letters. + * Escapes into: + * G1: ESC 2/13 4/6 ("-F") + * G2: ESC 2/14 4/6 (".F") + * G3: ESC 2/15 4/6 ("/F") + * Note: This Registration is a subset of ISO-IR 227. + * #144 is a "Cyrillic part of the Latin/Cyrillic Alphabet". + * Comprises of 95 characters. + * Escapes into: + * G1: ESC 2/13 4/12 ("-L") + * G2: ESC 2/14 4/12 (".L") + * G3: ESC 2/15 4/12 ("/L") + * #150 is a "Greek Primary Set of Graphic Characters". + * Comprises of 94 characters. + * Escapes into: + * G0: ESC 2/8 2/1 4/0 ("(!@") + * G1: ESC 2/9 2/1 4/0 (")!@") + * G2: ESC 2/10 2/1 4/0 ("*!@") + * G3: ESC 2/11 2/1 4/0 ("+!@") + * #153 is a "Basic Cyrillic Character Set for 8-bit codes". + * Comprises of 68 characters. + * Escapes into: + * G1: ESC 2/13 4/15 ("-O") + * G2: ESC 2/14 4/15 (".O") + * G3: ESC 2/15 4/15 ("/O") + * #156 is a "Supplementary Set of ISO/IEC 6937:1992" for use with #6 + * Comprises of 87 characters. + * Escapes into: + * G1: ESC 2/13 5/2 ("-R") + * G2: ESC 2/14 5/2 (".R") + * G3: ESC 2/15 5/2 ("/R") + * #164 is a "Hebrew Supplementary Set of Graphic Characters" + * Comprises of 27 characters. + * Escapes into: + * G1: ESC 2/13 5/3 ("-S") + * G2: ESC 2/14 5/3 (".S") + * G3: ESC 2/15 5/3 ("/S") + * #165 is a set of "Codes of the Chinese graphic character set" + * Is a multiple-byte set of 8446 characters. + * Escapes into: + * G0: ESC 2/4 2/8 4/5 ("$(E") + * G1: ESC 2/4 2/9 4/5 ("$)E") + * G2: ESC 2/4 2/10 4/5 ("$*E") + * G3: ESC 2/4 2/11 4/5 ("$+E") + * #168 is a "Japanese Graphic Character Set for Information Interchange" + * A multiple-byte set of 6879 characters updated from #87. + * Escapes into: + * G0: ESC 2/6 4/0 ESC 2/4 4/2 ("&@" "$B") + * G1: ESC 2/6 4/0 ESC 2/4 2/9 4/2 ("&@" "$)B") + * G2: ESC 2/6 4/0 ESC 2/4 2/10 4/2 ("&@" "$*B") + * G3: ESC 2/6 4/0 ESC 2/4 2/11 4/2 ("&@" "$+B") + */ + |