GNU bug report logs - #32252
[PATCH] %o and %x now format signed numbers

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Message #167 received at 32252 <at> debbugs.gnu.org (full text, mbox):

From: snickerbockers <snickerbockers <at> washemu.org>
To: 32252 <at> debbugs.gnu.org
Subject: i find binary-as-unsigned to be very helpful
Date: Mon, 04 Jul 2022 01:03:26 +0000

hello,

I use binary-as-unsigned in my .emacs, and I saw that the help
page
said to e-mail you if I find it useful.  Below is a function i
made that
displays a 32-bit two's complement of a given integer in hex.  I
do a
lot of reverse-engineering of low-level programs, so it is very
useful
for me to have a quick way to see how a given integer is actually
represented in the hardware.  if binary-as-unsigned wasn't
available to
make format do most of the work for me, this function would be a
lot
longer and more complicated.

(defun to-hex(value)
 "convert a signed int to its 32-bit two's complement in hex
 notation"
 (interactive "svalue:")
(let ((binary-as-unsigned t))
 (message (substring (format "%08x" (cl-parse-integer value))
 -8))))

(global-set-key (kbd "C-c h") 'to-hex)

Thanks,
snickerbockers

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