Re: How to get buffer byte length (not number of characters)?

[Joseph Turner <joseph@ushin.org>]

Eli Zaretskii <eliz@gnu.org> writes:

> you need to consider the encoding process: Emacs always encodes the
> buffer text on output to the external world.  If this is what you
> want, then you need to use bufferpos-to-filepos, and make sure you
> pass the correct coding-system argument to it.

Will the following code ever signal an error?

(bufferpos-to-filepos
 (point-max) 'exact
 (select-safe-coding-system (point-min) (point-max)))

The `bufferpos-to-filepos' docstring says, "It is an error to request
the ‘exact’ method when the buffer’s EOL format is not yet decided."
    
IOW, does `select-safe-coding-system' always return an encoding which
specifies EOL conversion?

Thank you!!

Joseph