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bug#53236: 26.1; encode-coding-string does not encode the string as expe
From: |
Markus Triska |
Subject: |
bug#53236: 26.1; encode-coding-string does not encode the string as expected |
Date: |
Thu, 13 Jan 2022 20:45:57 +0100 |
Dear all,
please consider the UTF-8 encoding of the Unicode codepoint 0x80, which
is formed by two bytes. In hexadecimal notation, they are: 0xC2 0x80.
We can use decode-coding-string to verify that this byte sequence is
decoded to 0x80 when specifying utf-8, which works exactly as expected:
(decode-coding-string "\xC2\x80" 'utf-8)
This yields "\200", which is the same as "\x80", as verified via:
(string= "\200" "\x80") --> t
Correspondingly, I expect (encode-coding-string "\200" 'utf-8) to yield
a string equivalent to "\xC2\x80", but that seems not to be the case. I get:
(encode-coding-string "\200" 'utf-8) --> "\200"
And therefore, unexpectedly:
(string= (encode-coding-string "\200" 'utf-8) "\xC2\x80") --> nil
It appears that encode-coding-string does not encode the string in UTF-8
as expected. Is there any way to obtain the desired encoding with
encode-coding-string, i.e., the UTF-8-encoded string "\xC2\x80"?
Thank you and all the best!
Markus
In GNU Emacs 26.1 (build 3, x86_64-pc-linux-gnu, X toolkit, Xaw scroll bars)
of 2019-04-09 built on mt-laptop
Windowing system distributor 'The X.Org Foundation', version 11.0.12004000
System Description: Ubuntu 19.04
Configured features:
XPM JPEG GIF PNG SOUND GSETTINGS NOTIFY GNUTLS LIBXML2 FREETYPE XFT ZLIB
TOOLKIT_SCROLL_BARS LUCID X11 THREADS
Important settings:
value of $LC_MONETARY: en_GB.UTF-8
value of $LC_NUMERIC: en_GB.UTF-8
value of $LC_TIME: en_GB.UTF-8
value of $LANG: en_US.UTF-8
value of $XMODIFIERS: @im=ibus
locale-coding-system: utf-8-unix
- bug#53236: 26.1; encode-coding-string does not encode the string as expected,
Markus Triska <=