| euc.5 (ee0694adb9143054ea2f109ce45ca2dd83381c32) | euc.5 (b9384efc1c264c63a53d8c420461ef9c0c17c2b1) |
|---|---|
| 1.\" Copyright (c) 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" This code is derived from software contributed to Berkeley by 5.\" Paul Borman at Krystal Technologies. 6.\" 7.\" Redistribution and use in source and binary forms, with or without 8.\" modification, are permitted provided that the following conditions --- 58 unchanged lines hidden (view full) --- 67.\".Ev LC_CTYPE 68.\"source file format. 69.\".Pp 70.Nm EUC 71implements a system of 4 multibyte codesets. 72A multibyte character in the first codeset consists of 73.Ar len1 74bytes starting with a byte in the range of 0x00 to 0x7f. | 1.\" Copyright (c) 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" This code is derived from software contributed to Berkeley by 5.\" Paul Borman at Krystal Technologies. 6.\" 7.\" Redistribution and use in source and binary forms, with or without 8.\" modification, are permitted provided that the following conditions --- 58 unchanged lines hidden (view full) --- 67.\".Ev LC_CTYPE 68.\"source file format. 69.\".Pp 70.Nm EUC 71implements a system of 4 multibyte codesets. 72A multibyte character in the first codeset consists of 73.Ar len1 74bytes starting with a byte in the range of 0x00 to 0x7f. |
| 75To allow use of ASCII, | 75To allow use of 76.Tn ASCII , |
| 76.Ar len1 77is always 1. 78A multibyte character in the second codeset consists of 79.Ar len2 80bytes starting with a byte in the range of 0x80-0xff excluding 0x8e and 0x8f. 81A multibyte character in the third codeset consists of 82.Ar len3 83bytes starting with the byte 0x8e. 84A multibyte character in the fourth codeset consists of 85.Ar len4 86bytes starting with the byte 0x8f. 87.Pp 88The | 77.Ar len1 78is always 1. 79A multibyte character in the second codeset consists of 80.Ar len2 81bytes starting with a byte in the range of 0x80-0xff excluding 0x8e and 0x8f. 82A multibyte character in the third codeset consists of 83.Ar len3 84bytes starting with the byte 0x8e. 85A multibyte character in the fourth codeset consists of 86.Ar len4 87bytes starting with the byte 0x8f. 88.Pp 89The |
| 89.Va wchar_t | 90.Vt wchar_t |
| 90encoding of 91.Nm EUC 92multibyte characters is dependent on the 93.Ar len 94and 95.Ar mask 96arguments. 97First, the bytes are moved into a | 91encoding of 92.Nm EUC 93multibyte characters is dependent on the 94.Ar len 95and 96.Ar mask 97arguments. 98First, the bytes are moved into a |
| 98.Va wchar_t | 99.Vt wchar_t |
| 99as follows: 100.Bd -literal 101byte0 << ((\fIlen\fPN-1) * 8) | byte1 << ((\fIlen\fPN-2) * 8) | ... | byte\fIlen\fPN-1 102.Ed 103.Pp 104The result is then ANDed with 105.Ar ~mask 106and ORed with 107.Ar maskN . 108Codesets 2 and 3 are special in that the leading byte (0x8e or 0x8f) is 109first removed and the 110.Ar lenN 111argument is reduced by 1. 112.Pp 113For example, the 114.Li ja_JP.eucJP 115locale has the following | 100as follows: 101.Bd -literal 102byte0 << ((\fIlen\fPN-1) * 8) | byte1 << ((\fIlen\fPN-2) * 8) | ... | byte\fIlen\fPN-1 103.Ed 104.Pp 105The result is then ANDed with 106.Ar ~mask 107and ORed with 108.Ar maskN . 109Codesets 2 and 3 are special in that the leading byte (0x8e or 0x8f) is 110first removed and the 111.Ar lenN 112argument is reduced by 1. 113.Pp 114For example, the 115.Li ja_JP.eucJP 116locale has the following |
| 116.Ev VARIABLE | 117.Va VARIABLE |
| 117line: 118.Bd -literal 119VARIABLE 1 0x0000 2 0x8080 2 0x0080 3 0x8000 0x8080 120.Ed 121.Pp 122Codeset 1 consists of the values 0x0000 - 0x007f. 123.Pp 124Codeset 2 consists of the values who have the bits 0x8080 set. 125.Pp 126Codeset 3 consists of the values 0x0080 - 0x00ff. 127.Pp 128Codeset 4 consists of the values 0x8000 - 0xff7f excluding the values 129which have the 0x0080 bit set. 130.Pp 131Notice that the global 132.Ar mask 133is set to 0x8080, this implies that from those 2 bits the codeset can 134be determined. | 118line: 119.Bd -literal 120VARIABLE 1 0x0000 2 0x8080 2 0x0080 3 0x8000 0x8080 121.Ed 122.Pp 123Codeset 1 consists of the values 0x0000 - 0x007f. 124.Pp 125Codeset 2 consists of the values who have the bits 0x8080 set. 126.Pp 127Codeset 3 consists of the values 0x0080 - 0x00ff. 128.Pp 129Codeset 4 consists of the values 0x8000 - 0xff7f excluding the values 130which have the 0x0080 bit set. 131.Pp 132Notice that the global 133.Ar mask 134is set to 0x8080, this implies that from those 2 bits the codeset can 135be determined. |
| 135.Sh "SEE ALSO" | 136.Sh SEE ALSO |
| 136.Xr mklocale 1 , 137.Xr setlocale 3 | 137.Xr mklocale 1 , 138.Xr setlocale 3 |