名字
charmap - 定义字符编码的字符符号
描述
一个字符集描述(字符映射-charmap）定义了一个有效字符集合及它们的编码。所有被支持的字符集都应该把 可移植字符集 作为其一个子集。
语法
一个字符映射文件开始于一个头，它可能包含下面关键字：
- <codeset>
- 其后给出编码集名字。
- <mb_cur_max>
- 其后给出多字节字符的最大字节数。多字节字符目前还不支持。默认值是 1。
- <mb_cur_min>
- 其后给出一个字符最少需要的字节个数。这个值必须小于或等于 mb_cur_max。如果没有指定，它的默认值是 mb_cur_max。
- <escape_char>
- 其后是一个被用于转义的字符，转义字符用于标记本文件后需要特殊处理的字符。默认地，它是反斜杠(\)。
- <comment_char>
- 其后是一个在本文件后用于注释用的字符。默认值是井号(#)。
字符映射定义自身开始于第一列的关键字 CHARMAP。
下面行可能含有下面两种定义字符编码的形式：
- <symbolic-name> <encoding> <comments>
- 这个形式直接定义一个字符和它的编码。
- <symbolic-name>...<symbolic-name> <encoding> <comments>
- 这个形式定义一组编码。这只对多字节字符有用，但目前还没有实现。
字符映射文件的最后一行必须包含 END CHARMAP。
符号名
一个字符的 符号名 只包含 可移植字符集 字符。名字本身被尖括号包围。跟随在 <escape_char> 之后的字符被处理为其自身；如序列 <\\\>> 代表被尖括号包围的符号名 \>。
字符编码
编码可能有下面三种形式：
- <escape_char>d<number>
- 使用十进制数字
- <escape_char>x<number>
- 使用十六进制数字
- <escape_char><number>
- 使用八进制数字
文件
/usr/share/i18n/charmaps/*
遵循于
POSIX.2。
参看
locale(1), localedef(1), localeconv(3), setlocale(3), locale(5)
#p#
NAME
charmap - character symbols to define character encodings
DESCRIPTION
A character set description (charmap) defines a characterset of available characters and their encodings. All supported character sets should have the portable character set as a proper subset.
SYNTAX
The charmap file starts with a header, that may consist of the following keywords:
- <codeset>
- is followed by the name of the codeset.
- <mb_cur_max>
- is followed by the max number of bytes for a multibyte-character. Multibyte characters are currently not supported. The default value is 1.
- <mb_cur_min>
- is followed by the min number of bytes for a character. This value must be less or equal than mb_cur_max. If not specified, it defaults to mb_cur_max.
- <escape_char>
- is followed by a character that should be used as the escape-character for the rest of the file to mark characters that should be interpreted in a special way. It defaults to the backslash ( \\ ).
- <comment_char>
- is followed by a character that will be used as the comment-character for the rest of the file. It defaults to the number sign ( # ).
The charmap-definition itself starts with the keyword CHARMAP in column 1.
The following lines may have one of the two following forms to define the character-encodings:
- <symbolic-name> <encoding> <comments>
- This form defines exactly one character and its encoding.
- <symbolic-name>...<symbolic-name> <encoding> <comments>
- This form defines a couple of characters. This is only useful for mutlibyte-characters, which are currently not implemented.
The last line in a charmap-definition file must contain END CHARMAP.
SYMBOLIC NAMES
A symbolic name for a character contains only characters of the portable character set. The name itself is enclosed between angle brackets. Characters following an <escape_char> are interpreted as itself; for example, the sequence '<\\\\\\>>' represents the symbolic name '\\>' enclosed in angle brackets.
CHARACTER ENCODING
The encoding may be in each of the following three forms:
- <escape_char>d<number>
- with a decimal number
- <escape_char>x<number>
- with a hexadecimal number
- <escape_char><number>
- with an octal number.
FILES
/usr/share/i18n/charmaps/*
AUTHOR
Jochen Hein (jochen.hein@delphi.central.de)
CONFORMING TO
POSIX.2
SEE ALSO
locale(1), localedef(1), setlocale(3), localeconv(3), locale(5)
