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You can specify the coding system for a specific operation by binding the
variables coding-system-for-read and/or
coding-system-for-write.
If this variable is non-nil, it specifies the coding system to use
for reading a file, or for input from a synchronous subprocess.
It also applies to any asynchronous subprocess or network stream, but in a
different way: the value of coding-system-for-read when you start the
subprocess or open the network stream specifies the input decoding method
for that subprocess or network stream. It remains in use for that
subprocess or network stream unless and until overridden.
The right way to use this variable is to bind it with let for a
specific I/O operation. Its global value is normally nil, and you
should not globally set it to any other value. Here is an example of the
right way to use the variable:
;; Read the file with no character code conversion. ;; Assume crlf represents end-of-line. (let ((coding-system-for-read 'emacs-mule-dos)) (insert-file-contents filename)) |
When its value is non-nil, this variable takes precedence over all
other methods of specifying a coding system to use for input, including
file-coding-system-alist, process-coding-system-alist and
network-coding-system-alist.
This works much like coding-system-for-read, except that it applies
to output rather than input. It affects writing to files, as well as
sending output to subprocesses and net connections.
When a single operation does both input and output, as do
call-process-region and start-process, both
coding-system-for-read and coding-system-for-write affect it.
When this variable is non-nil, no end-of-line conversion is done, no
matter which coding system is specified. This applies to all the Emacs I/O
and subprocess primitives, and to the explicit encoding and decoding
functions (voir la section Explicit Encoding and Decoding).
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Ce document a été généré par Eric Reinbold le 13 Octobre 2007 en utilisant texi2html 1.78.