When Emacs reads or writes a file, and when Emacs sends text to a subprocess or receives text from a subprocess, it normally performs character code conversion and end-of-line conversion as specified by a particular coding system.
How to define a coding system is an arcane matter, and is not documented here.
| • Coding System Basics: | Basic concepts. | |
| • Encoding and I/O: | How file I/O functions handle coding systems. | |
| • Lisp and Coding Systems: | Functions to operate on coding system names. | |
| • User-Chosen Coding Systems: | Asking the user to choose a coding system. | |
| • Default Coding Systems: | Controlling the default choices. | |
| • Specifying Coding Systems: | Requesting a particular coding system for a single file operation. | |
| • Explicit Encoding: | Encoding or decoding text without doing I/O. | |
| • Terminal I/O Encoding: | Use of encoding for terminal I/O. |
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Licensed under the GNU GPL license.
https://www.gnu.org/software/emacs/manual/html_node/elisp/Coding-Systems.html