Commit 1ee89891 authored by Richard M. Stallman's avatar Richard M. Stallman
Browse files

(Converting Representations):

Add multibyte-char-to-unibyte and unibyte-char-to-multibyte.
(Encoding and I/O): Add file-name-coding-system.
parent 3ab66863
......@@ -210,6 +210,18 @@ multibyte string. If @var{string} is a multibyte string, it is
returned unchanged.
@end defun
@defun multibyte-char-to-unibyte char
This convert the multibyte character @var{char} to a unibyte
character, based on @code{nonascii-translation-table} and
@end defun
@defun unibyte-char-to-multibyte char
This convert the unibyte character @var{char} to a multibyte
character, based on @code{nonascii-translation-table} and
@end defun
@node Selecting a Representation
@section Selecting a Representation
......@@ -701,6 +713,26 @@ interested in.
The variable @code{selection-coding-system} specifies how to encode
selections for the window system. @xref{Window System Selections}.
@defvar file-name-coding-system
The variable @code{file-name-coding-system} specifies the coding
system to use for encoding file names. Emacs encodes file names using
that coding system for all file operations. If
@code{file-name-coding-system} is @code{nil}, Emacs uses a default
coding system determined by the selected language environment. In the
default language environment, any non-@acronym{ASCII} characters in
file names are not encoded specially; they appear in the file system
using the internal Emacs representation.
@end defvar
@strong{Warning:} if you change @code{file-name-coding-system} (or
the language environment) in the middle of an Emacs session, problems
can result if you have already visited files whose names were encoded
using the earlier coding system and are handled differently under the
new coding system. If you try to save one of these buffers under the
visited file name, saving may use the wrong file name, or it may get
an error. If such a problem happens, use @kbd{C-x C-w} to specify a
new file name for that buffer.
@node Lisp and Coding Systems
@subsection Coding Systems in Lisp
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