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Re: Using the GNU GMP Library for Bignums in Emacs

From: Paul Eggert
Subject: Re: Using the GNU GMP Library for Bignums in Emacs
Date: Mon, 30 Apr 2018 00:04:12 -0700
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.7.0

Richard Stallman wrote:
I expect that %x is used only for values meant to interact
with the operating system in certain ways

Hexadecimal is used for many other purposes. For example, the shell command 'git log' at the top level of Emacs currently outputs a first line containing the hexadecimal string bca6c4348077c8c0b368503b16378867b6d49659 which represents an integer containing 160 bits, the integer width of the SHA-1 checksums used by Git. Although Emacs cannot now process such a number directly, with bignums it will be able to and %x is the natural way to format such numbers.

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