From bbad770cf2e569795715c9ec3c144812f126d870 Mon Sep 17 00:00:00 2001 From: William Carroll Date: Thu, 24 Nov 2022 22:20:10 -0800 Subject: feat(wpcarro/emacs): Package bytes.el Another meh package, but let's finish the job and package it up. Change-Id: I7852a776c93c8c6717878a5ee0742287d2d23052 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7394 Reviewed-by: wpcarro Tested-by: BuildkiteCI --- users/wpcarro/emacs/pkgs/bytes/bytes.el | 94 ++++++++++++++++++++++++++++++ users/wpcarro/emacs/pkgs/bytes/default.nix | 25 ++++++++ users/wpcarro/emacs/pkgs/bytes/tests.el | 18 ++++++ 3 files changed, 137 insertions(+) create mode 100644 users/wpcarro/emacs/pkgs/bytes/bytes.el create mode 100644 users/wpcarro/emacs/pkgs/bytes/default.nix create mode 100644 users/wpcarro/emacs/pkgs/bytes/tests.el (limited to 'users/wpcarro/emacs/pkgs') diff --git a/users/wpcarro/emacs/pkgs/bytes/bytes.el b/users/wpcarro/emacs/pkgs/bytes/bytes.el new file mode 100644 index 000000000000..b0d64795a074 --- /dev/null +++ b/users/wpcarro/emacs/pkgs/bytes/bytes.el @@ -0,0 +1,94 @@ +;;; bytes.el --- Working with byte values -*- lexical-binding: t -*- + +;; Author: William Carroll +;; Version: 0.0.1 +;; Package-Requires: ((emacs "24.3")) + +;;; Commentary: +;; Functions to help with human-readable representations of byte values. +;; +;; Usage: +;; See the test cases for example usage. Or better yet, I should use a type of +;; structured documentation that would allow me to expose a view into the test +;; suite here. Is this currently possible in Elisp? +;; +;; API: +;; - serialize :: Integer -> String +;; +;; Wish list: +;; - Rounding: e.g. (bytes (* 1024 1.7)) => "2KB" + +;;; Code: + +;; TODO: Support -ibabyte variants like Gibibyte (GiB). + +;; Ranges: +;; B: [ 0, 1e3) +;; KB: [ 1e3, 1e6) +;; MB: [ 1e6, 1e6) +;; GB: [ 1e9, 1e12) +;; TB: [1e12, 1e15) +;; PB: [1e15, 1e18) +;; +;; Note: I'm currently not support exabytes because that causes the integer to +;; overflow. I imagine a larger integer type may exist, but for now, I'll +;; treat this as a YAGNI. + +;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; +;; Dependencies +;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; + +(require 'tuple) + +;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; +;; Constants +;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; + +(defconst bytes-kb (expt 2 10) + "Number of bytes in a kilobyte.") + +(defconst bytes-mb (expt 2 20) + "Number of bytes in a megabytes.") + +(defconst bytes-gb (expt 2 30) + "Number of bytes in a gigabyte.") + +(defconst bytes-tb (expt 2 40) + "Number of bytes in a terabyte.") + +(defconst bytes-pb (expt 2 50) + "Number of bytes in a petabyte.") + +(defconst bytes-eb (expt 2 60) + "Number of bytes in an exabyte.") + +;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; +;; Functions +;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; + +(defun bytes-classify (x) + "Return unit that closest fits byte count, X." + (cond + ((and (>= x 0) (< x bytes-kb)) 'byte) + ((and (>= x bytes-kb) (< x bytes-mb)) 'kilobyte) + ((and (>= x bytes-mb) (< x bytes-gb)) 'megabyte) + ((and (>= x bytes-gb) (< x bytes-tb)) 'gigabyte) + ((and (>= x bytes-tb) (< x bytes-pb)) 'terabyte) + ((and (>= x bytes-pb) (< x bytes-eb)) 'petabyte))) + +(defun bytes-to-string (x) + "Convert integer X into a human-readable string." + (let ((base-and-unit + (pcase (bytes-classify x) + ('byte (tuple-from 1 "B")) + ('kilobyte (tuple-from bytes-kb "KB")) + ('megabyte (tuple-from bytes-mb "MB")) + ('gigabyte (tuple-from bytes-gb "GB")) + ('terabyte (tuple-from bytes-tb "TB")) + ('petabyte (tuple-from bytes-pb "PB"))))) + (format "%d%s" + (round x (tuple-first base-and-unit)) + (tuple-second base-and-unit)))) + +(provide 'bytes) +;;; bytes.el ends here diff --git a/users/wpcarro/emacs/pkgs/bytes/default.nix b/users/wpcarro/emacs/pkgs/bytes/default.nix new file mode 100644 index 000000000000..4e9f52d9b927 --- /dev/null +++ b/users/wpcarro/emacs/pkgs/bytes/default.nix @@ -0,0 +1,25 @@ +{ pkgs, depot, ... }: + +let + bytes = pkgs.callPackage + ({ emacsPackages }: + emacsPackages.trivialBuild { + pname = "bytes"; + version = "1.0.0"; + src = ./bytes.el; + packageRequires = + (with depot.users.wpcarro.emacs.pkgs; [ + tuple + ]); + }) + { }; + + emacs = (pkgs.emacsPackagesFor pkgs.emacs28).emacsWithPackages (epkgs: [ bytes ]); +in +bytes.overrideAttrs (_old: { + doCheck = true; + checkPhase = '' + ${emacs}/bin/emacs -batch \ + -l ert -l ${./tests.el} -f ert-run-tests-batch-and-exit + ''; +}) diff --git a/users/wpcarro/emacs/pkgs/bytes/tests.el b/users/wpcarro/emacs/pkgs/bytes/tests.el new file mode 100644 index 000000000000..9b71a466c736 --- /dev/null +++ b/users/wpcarro/emacs/pkgs/bytes/tests.el @@ -0,0 +1,18 @@ +;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; +;; Dependencies +;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; + +(require 'ert) +(require 'bytes) + +;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; +;; Tests +;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; + +(ert-deftest bytes-to-string () + (should (equal "1000B" (bytes-to-string 1000))) + (should (equal "2KB" (bytes-to-string (* 2 bytes-kb)))) + (should (equal "17MB" (bytes-to-string (* 17 bytes-mb)))) + (should (equal "419GB" (bytes-to-string (* 419 bytes-gb)))) + (should (equal "999TB" (bytes-to-string (* 999 bytes-tb)))) + (should (equal "2PB" (bytes-to-string (* 2 bytes-pb))))) -- cgit 1.4.1