232 lines
7.3 KiB
Groff
232 lines
7.3 KiB
Groff
.\" Copyright (c) 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" This code is derived from software contributed to Berkeley by
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.\" Paul Borman at Krystal Technologies.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)euc.4 8.1 (Berkeley) 6/4/93
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.\"
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.Dd "June 4, 1993"
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.Dt EUC 4
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.Os
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.Sh NAME
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.Nm EUC
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.Nd EUC encoding of runes
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.Sh SYNOPSIS
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\fBENCODING "EUC"\fP
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.br
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\fBVARIABLE \fP\fIlen1 mask1 len2 mask2 len3 mask3 len4 mask4 mask\fP
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.Sh DESCRIPTION
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The
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.Nm EUC
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encoding is provided for compatibility with
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.Ux
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based systems.
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See
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.Xr mklocale 1
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for a complete description of the
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.Ev LC_CTYPE
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source file format.
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.Pp
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.Nm EUC
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implements a system of 4 multibyte codesets.
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A multibyte character in the first codeset consists of
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.Ar len1
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bytes starting with a byte in the range of 0x00 to 0x7f.
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To allow use of ASCII,
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.Ar len1
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is always 1.
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A multibyte character in the second codeset consists of
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.Ar len2
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bytes starting with a byte in the range of 0x80-0xff excluding 0x8e and 0x8f.
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A multibyte character in the third codeset consists of
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.Ar len3
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bytes starting with the byte 0x8e.
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A multibyte character in the fourth codeset consists of
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.Ar len4
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bytes starting with the byte 0x8f.
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.Pp
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The
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.Ev rune_t
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encoding of
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.Nm EUC
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multibyte characters is dependent on the
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.Ar len
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and
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.Ar mask
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arguments.
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First, the bytes are moved into a
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.Ev rune_t
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as follows:
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.Bd -literal
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byte0 << ((\fIlen\fPN-1) * 8) | byte1 << ((\fIlen\fPN-2) * 8) | ... | byte\fIlen\fPN-1
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.Ed
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.sp
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The result is then ANDed with
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.Ar ~mask
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and ORed with
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.Ar mask\fPN.
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Codesets 2 and 3 are special in that the leading byte (0x8e or 0x8f) is
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first removed and the
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.Ar len\fPN
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argument is reduced by 1.
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.sp
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For example, the Japanese locale has the following
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.Ev VARIABLE
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line:
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.Bd -literal
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VARIABLE 1 0x0000 2 0x8080 2 0x0080 3 0x8000 0x8080
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.Ed
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.sp
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Codeset 1 consists of the values 0x0000 - 0x007f.
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.sp
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Codeset 2 consists of the values who have the bits 0x8080 set.
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.sp
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Codeset 3 consists of the values 0x0080 - 0x00ff.
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.sp
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Codeset 4 consists of the values 0x8000 - 0xff7f excluding the values
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which have the 0x0080 bit set.
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.sp
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Notice that the global
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.Ar mask
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is set to 0x8080, this implies that from those 2 bits the codeset can
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be determined.
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.Sh "EXAMPLE - Japanese Locale"
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This is a complete example of an
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.Ev LC_CTYPE
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source file for the Japanese locale
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.Bd -literal
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/*
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* Japanese LOCALE_CTYPE definitions using EUC of JIS character sets
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*/
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ENCODING "EUC"
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/* JIS JIS JIS */
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/* X201 X208 X201 */
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/* 00-7f 84-fe */
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VARIABLE 1 0x0000 2 0x8080 2 0x0080 3 0x8000 0x8080
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/*
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* Code Set 1
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*/
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ALPHA 'A' - 'Z' 'a' - 'z'
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CONTROL 0x00 - 0x1f 0x7f
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DIGIT '0' - '9'
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GRAPH 0x21 - 0x7e
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LOWER 'a' - 'z'
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PUNCT 0x21 - 0x2f 0x3a - 0x40 0x5b - 0x60 0x7b - 0x7e
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SPACE 0x09 - 0x0d 0x20
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UPPER 'A' - 'Z'
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XDIGIT 'a' - 'f' 'A' - 'F'
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BLANK ' ' '\t'
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PRINT 0x20 - 0x7e
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MAPLOWER < 'A' - 'Z' : 'a' > < 'a' - 'z' : 'a' >
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MAPUPPER < 'A' - 'Z' : 'A' > < 'a' - 'z' : 'A' >
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TODIGIT < '0' - '9' : 0 >
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TODIGIT < 'A' - 'F' : 10 > < 'a' - 'f' : 10 >
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/*
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* Code Set 2
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*/
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SPACE 0xa1a1
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PHONOGRAM 0xa1bc
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SPECIAL 0xa1a2 - 0xa1fe
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PUNCT 0xa1a2 - 0xa1f8 /* A few too many in here... */
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SPECIAL 0xa2a1 - 0xa2ae 0xa2ba - 0xa2c1 0xa2ca - 0xa2d0 0xa2dc - 0xa2ea
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SPECIAL 0xa2f2 - 0xa2f9 0xa2fe
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DIGIT 0xa3b0 - 0xa3b9
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UPPER 0xa3c1 - 0xa3da /* Romaji */
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LOWER 0xa3e1 - 0xa3fa /* Romaji */
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MAPLOWER < 0xa3c1 - 0xa3da : 0xa3e1 > /* English */
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MAPLOWER < 0xa3e1 - 0xa3fa : 0xa3e1 > /* English */
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MAPUPPER < 0xa3c1 - 0xa3da : 0xa3c1 >
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MAPUPPER < 0xa3e1 - 0xa3fa : 0xa3c1 >
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XDIGIT 0xa3c1 - 0xa3c6 0xa3e1 - 0xa3e6
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TODIGIT < 0xa3b0 - 0xa3b9 : 0 >
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TODIGIT < 0xa3c1 - 0xa3c6 : 10 > < 0xa3e1 - 0xa3e6 : 10 >
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PHONOGRAM 0xa4a1 - 0xa4f3
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PHONOGRAM 0xa5a1 - 0xa5f6
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UPPER 0xa6a1 - 0xa6b8 /* Greek */
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LOWER 0xa6c1 - 0xa6d8 /* Greek */
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MAPLOWER < 0xa6a1 - 0xa6b8 : 0xa6c1 > < 0xa6c1 - 0xa6d8 : 0xa6c1 >
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MAPUPPER < 0xa6a1 - 0xa6b8 : 0xa6a1 > < 0xa6c1 - 0xa6d8 : 0xa6a1 >
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UPPER 0xa7a1 - 0xa7c1 /* Cyrillic */
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LOWER 0xa7d1 - 0xa7f1 /* Cyrillic */
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MAPLOWER < 0xa7a1 - 0xa7c1 : 0xa7d1 > < 0xa7d1 - 0xa7f1 : 0xa7d1 >
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MAPUPPER < 0xa7a1 - 0xa7c1 : 0xa7a1 > < 0xa7d1 - 0xa7f1 : 0xa7a1 >
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SPECIAL 0xa8a1 - 0xa8c0
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IDEOGRAM 0xb0a1 - 0xb0fe 0xb1a1 - 0xb1fe 0xb2a1 - 0xb2fe
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IDEOGRAM 0xb3a1 - 0xb3fe 0xb4a1 - 0xb4fe 0xb5a1 - 0xb5fe
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IDEOGRAM 0xb6a1 - 0xb6fe 0xb7a1 - 0xb7fe 0xb8a1 - 0xb8fe
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IDEOGRAM 0xb9a1 - 0xb9fe 0xbaa1 - 0xbafe 0xbba1 - 0xbbfe
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IDEOGRAM 0xbca1 - 0xbcfe 0xbda1 - 0xbdfe 0xbea1 - 0xbefe
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IDEOGRAM 0xbfa1 - 0xbffe 0xc0a1 - 0xc0fe 0xc1a1 - 0xc1fe
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IDEOGRAM 0xc2a1 - 0xc2fe 0xc3a1 - 0xc3fe 0xc4a1 - 0xc4fe
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IDEOGRAM 0xc5a1 - 0xc5fe 0xc6a1 - 0xc6fe 0xc7a1 - 0xc7fe
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IDEOGRAM 0xc8a1 - 0xc8fe 0xc9a1 - 0xc9fe 0xcaa1 - 0xcafe
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IDEOGRAM 0xcba1 - 0xcbfe 0xcca1 - 0xccfe 0xcda1 - 0xcdfe
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IDEOGRAM 0xcea1 - 0xcefe 0xcfa1 - 0xcfd3 0xd0a1 - 0xd0fe
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IDEOGRAM 0xd1a1 - 0xd1fe 0xd2a1 - 0xd2fe 0xd3a1 - 0xd3fe
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IDEOGRAM 0xd4a1 - 0xd4fe 0xd5a1 - 0xd5fe 0xd6a1 - 0xd6fe
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IDEOGRAM 0xd7a1 - 0xd7fe 0xd8a1 - 0xd8fe 0xd9a1 - 0xd9fe
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IDEOGRAM 0xdaa1 - 0xdafe 0xdba1 - 0xdbfe 0xdca1 - 0xdcfe
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IDEOGRAM 0xdda1 - 0xddfe 0xdea1 - 0xdefe 0xdfa1 - 0xdffe
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IDEOGRAM 0xe0a1 - 0xe0fe 0xe1a1 - 0xe1fe 0xe2a1 - 0xe2fe
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IDEOGRAM 0xe3a1 - 0xe3fe 0xe4a1 - 0xe4fe 0xe5a1 - 0xe5fe
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IDEOGRAM 0xe6a1 - 0xe6fe 0xe7a1 - 0xe7fe 0xe8a1 - 0xe8fe
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IDEOGRAM 0xe9a1 - 0xe9fe 0xeaa1 - 0xeafe 0xeba1 - 0xebfe
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IDEOGRAM 0xeca1 - 0xecfe 0xeda1 - 0xedfe 0xeea1 - 0xeefe
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IDEOGRAM 0xefa1 - 0xeffe 0xf0a1 - 0xf0fe 0xf1a1 - 0xf1fe
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IDEOGRAM 0xf2a1 - 0xf2fe 0xf3a1 - 0xf3fe 0xf4a1 - 0xf4a4
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/*
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* This is for Code Set 3, half-width kana
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*/
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SPECIAL 0xa1 - 0xdf
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PHONOGRAM 0xa1 - 0xdf
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CONTROL 0x84 - 0x97 0x9b - 0x9f 0xe0 - 0xfe
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.Ed
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.Sh "SEE ALSO"
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.Xr mklocale 1 ,
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.Xr setlocale 3
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