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<HTML><HEAD><TITLE>Xlib Programming Manual: Character Sets and Encodings</TITLE></HEAD><BODY><H1 ALIGN=center>1.7. Character Sets and Encodings</H1>Some of the Xlib functions make reference to specific character setsand character encodings.The following are the most common:<UL><P><LI>X Portable Character Set.IPA basic set of 97 characters, which are assumed to exist in all locales supported by Xlib.This set contains the following characters:<P>a..z A..Z 0..9!"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~<space>, <tab>, and <newline><P>This set is the left/lower halfof the graphic character set of ISO8859-1 plus space, tab, and newline.It is also the set of graphic characters in 7-bit ASCII plus the samethree control characters.The actual encoding of these characters on the host is system dependent.<P><LI>Host Portable Character Encoding<P>The encoding of the X Portable Character Set on the host.The encoding itself is not defined by this standard,but the encoding must be the same in all locales supported by Xlib on the host.If a string is said to be in the Host Portable Character Encoding,then it only contains characters from the X Portable Character Set,in the host encoding.<P><LI>Latin-1<P>The coded character set defined by the ISO8859-1 standard.<P><LI>Latin Portable Character Encoding<P>The encoding of the X Portable Character Set using the Latin-1 codepointsplus ASCII control characters.If a string is said to be in the Latin Portable Character Encoding,then it only contains characters from the X Portable Character Set,not all of Latin-1.<P><LI>STRING Encoding<P>Latin-1, plus tab and newline.<P><LI>POSIX Portable Filename Character Set<P>The set of 65 characters, which can be used in naming files on a POSIX-compliant host,that are correctly processed in all locales.The set is:<P>a..z A..Z 0..9 ._-</UL><H5 ALIGN=right><I>Next: <A HREF="formatting.html">Formatting Conventions</A></I></H5><HR><ADDRESS><A HREF="http://tronche.com/">Christophe Tronche</A>, <A HREF="mailto:ch.tronche@computer.org">ch.tronche@computer.org</A></ADDRESS></BODY></HTML>⌨️ 快捷键说明
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