| | 1 | .\" Copyright (c) 2002, 2003 Tim J. Robbins |
| | 2 | .\" All rights reserved. |
| | 3 | .\" |
| | 4 | .\" Redistribution and use in source and binary forms, with or without |
| | 5 | .\" modification, are permitted provided that the following conditions |
| | 6 | .\" are met: |
| | 7 | .\" 1. Redistributions of source code must retain the above copyright |
| | 8 | .\" notice, this list of conditions and the following disclaimer. |
| | 9 | .\" 2. Redistributions in binary form must reproduce the above copyright |
| | 10 | .\" notice, this list of conditions and the following disclaimer in the |
| | 11 | .\" documentation and/or other materials provided with the distribution. |
| | 12 | .\" |
| | 13 | .\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| | 14 | .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| | 15 | .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| | 16 | .\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| | 17 | .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| | 18 | .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| | 19 | .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| | 20 | .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| | 21 | .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| | 22 | .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| | 23 | .\" SUCH DAMAGE. |
| | 24 | .\" |
| | 25 | .\" $FreeBSD: src/lib/libc/locale/gb18030.5,v 1.6 2004/07/05 06:36:36 ru Exp $ |
| | 26 | .\" |
| | 27 | .Dd August 10, 2003 |
| | 28 | .Dt GB18030 5 |
| | 29 | .Os |
| | 30 | .Sh NAME |
| | 31 | .Nm gb18030 |
| | 32 | .Nd "GB 18030 encoding method for Chinese text" |
| | 33 | .Sh SYNOPSIS |
| | 34 | .Nm ENCODING |
| | 35 | .Qq GB18030 |
| | 36 | .Sh DESCRIPTION |
| | 37 | The |
| | 38 | .Nm GB18030 |
| | 39 | encoding implements GB 18030-2000, a PRC national standard for the encoding of |
| | 40 | Chinese characters. |
| | 41 | It is a superset of the older GB\ 2312-1980 and GBK encodings, |
| | 42 | and incorporates Unicode's Unihan Extension A completely. |
| | 43 | It also provides code space for all Unicode 3.0 code points. |
| | 44 | .Pp |
| | 45 | Multibyte characters in the |
| | 46 | .Nm GB18030 |
| | 47 | encoding can be one byte, two bytes, or |
| | 48 | four bytes long. |
| | 49 | There are a total of over 1.5 million code positions. |
| | 50 | .Pp |
| | 51 | .No GB\ 11383-1981 Pq Tn ASCII |
| | 52 | characters are represented by single bytes in the range 0x00 to 0x7F. |
| | 53 | .Pp |
| | 54 | Chinese characters are represented as either two bytes or four bytes. |
| | 55 | Characters that are represented by two bytes begin with a byte in the range |
| | 56 | 0x81-0xFE and end with a byte either in the range 0x40-0x7E or 0x80-0xFE. |
| | 57 | .Pp |
| | 58 | Characters that are represented by four bytes begin with a byte in the range |
| | 59 | 0x81-0xFE, have a second byte in the range 0x30-0x39, a third byte in the range |
| | 60 | 0x81-0xFE and a fourth byte in the range 0x30-0x39. |
| | 61 | .Sh SEE ALSO |
| | 62 | .Xr euc 5 , |
| | 63 | .Xr gb2312 5 , |
| | 64 | .Xr gbk 5 , |
| | 65 | .Xr utf8 5 |
| | 66 | .Rs |
| | 67 | .%T "Chinese National Standard GB 18030-2000: Information Technology -- Chinese ideograms coded character set for information interchange -- Extension for the basic set" |
| | 68 | .%D "March 2000" |
| | 69 | .Re |
| | 70 | .Rs |
| | 71 | .%Q "The Unicode Consortium" |
| | 72 | .%T "The Unicode Standard, Version 3.0" |
| | 73 | .%D "2000" |
| | 74 | .Re |
| | 75 | .Sh STANDARDS |
| | 76 | The |
| | 77 | .Nm GB18030 |
| | 78 | encoding is believed to be compatible with GB 18030-2000. |
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