From edf83982be214f3c839fab9b659f645de53a9100 Mon Sep 17 00:00:00 2001
From: Joey Hess <joeyh@joeyh.name>
Date: Mon, 14 Aug 2023 12:06:32 -0400
Subject: merge from git-annex

Support building with unix-compat 0.7
---
 Utility/DataUnits.hs | 56 ++++++++++++++++++++++++++++++++++++++--------------
 1 file changed, 41 insertions(+), 15 deletions(-)

(limited to 'Utility/DataUnits.hs')

diff --git a/Utility/DataUnits.hs b/Utility/DataUnits.hs
index a6c9ffc..8d910c6 100644
--- a/Utility/DataUnits.hs
+++ b/Utility/DataUnits.hs
@@ -1,6 +1,6 @@
 {- data size display and parsing
  -
- - Copyright 2011 Joey Hess <id@joeyh.name>
+ - Copyright 2011-2022 Joey Hess <id@joeyh.name>
  -
  - License: BSD-2-clause
  -
@@ -21,14 +21,20 @@
  - error. This was bad.
  -
  - So, a committee was formed. And it arrived at a committee-like decision,
- - which satisfied noone, confused everyone, and made the world an uglier
- - place. As with all committees, this was meh.
+ - which satisfied no one, confused everyone, and made the world an uglier
+ - place. As with all committees, this was meh. Or in this case, "mib".
  -
  - And the drive manufacturers happily continued selling drives that are
  - increasingly smaller than you'd expect, if you don't count on your
  - fingers. But that are increasingly too big for anyone to much notice.
  - This caused me to need git-annex.
  -
+ - Meanwhile, over in telecommunications land, they were using entirely
+ - different units that differ only in capitalization sometimes.
+ - (At one point this convinced me that it was a good idea to buy an ISDN
+ - line because 128 kb/s sounded really fast! But it was really only 128
+ - kbit/s...)
+ -
  - Thus, I use units here that I loathe. Because if I didn't, people would
  - be confused that their drives seem the wrong size, and other people would
  - complain at me for not being standards compliant. And we call this
@@ -38,7 +44,7 @@
 module Utility.DataUnits (
 	dataUnits,
 	storageUnits,
-	memoryUnits,
+	committeeUnits,
 	bandwidthUnits,
 	oldSchoolUnits,
 	Unit(..),
@@ -62,28 +68,30 @@ data Unit = Unit ByteSize Abbrev Name
 	deriving (Ord, Show, Eq)
 
 dataUnits :: [Unit]
-dataUnits = storageUnits ++ memoryUnits
+dataUnits = storageUnits ++ committeeUnits ++ bandwidthUnits
 
 {- Storage units are (stupidly) powers of ten. -}
 storageUnits :: [Unit]
 storageUnits =
-	[ Unit (p 8) "YB" "yottabyte"
+	[ Unit (p 10) "QB" "quettabyte"
+	, Unit (p 9) "RB" "ronnabyte"
+	, Unit (p 8) "YB" "yottabyte"
 	, Unit (p 7) "ZB" "zettabyte"
 	, Unit (p 6) "EB" "exabyte"
 	, Unit (p 5) "PB" "petabyte"
 	, Unit (p 4) "TB" "terabyte"
 	, Unit (p 3) "GB" "gigabyte"
 	, Unit (p 2) "MB" "megabyte"
-	, Unit (p 1) "kB" "kilobyte" -- weird capitalization thanks to committe
-	, Unit (p 0) "B" "byte"
+	, Unit (p 1) "kB" "kilobyte" -- weird capitalization thanks to committee
+	, Unit 1 "B" "byte"
 	]
   where
 	p :: Integer -> Integer
 	p n = 1000^n
 
-{- Memory units are (stupidly named) powers of 2. -}
-memoryUnits :: [Unit]
-memoryUnits =
+{- Committee units are (stupidly named) powers of 2. -}
+committeeUnits :: [Unit]
+committeeUnits =
 	[ Unit (p 8) "YiB" "yobibyte"
 	, Unit (p 7) "ZiB" "zebibyte"
 	, Unit (p 6) "EiB" "exbibyte"
@@ -92,19 +100,37 @@ memoryUnits =
 	, Unit (p 3) "GiB" "gibibyte"
 	, Unit (p 2) "MiB" "mebibyte"
 	, Unit (p 1) "KiB" "kibibyte"
-	, Unit (p 0) "B" "byte"
+	, Unit 1 "B" "byte"
 	]
   where
 	p :: Integer -> Integer
 	p n = 2^(n*10)
 
-{- Bandwidth units are only measured in bits if you're some crazy telco. -}
+{- Bandwidth units are (stupidly) measured in bits, not bytes, and are
+ - (also stupidly) powers of ten. 
+ -
+ - While it's fairly common for "Mb", "Gb" etc to be used, that differs
+ - from "MB", "GB", etc only in case, and readSize is case-insensitive.
+ - So "Mbit", "Gbit" etc are used instead to avoid parsing ambiguity.
+ -}
 bandwidthUnits :: [Unit]
-bandwidthUnits = error "stop trying to rip people off"
+bandwidthUnits =
+	[ Unit (p 8) "Ybit" "yottabit"
+	, Unit (p 7) "Zbit" "zettabit"
+	, Unit (p 6) "Ebit" "exabit"
+	, Unit (p 5) "Pbit" "petabit"
+	, Unit (p 4) "Tbit" "terabit"
+	, Unit (p 3) "Gbit" "gigabit"
+	, Unit (p 2) "Mbit" "megabit"
+	, Unit (p 1) "kbit" "kilobit" -- weird capitalization thanks to committee
+	]
+  where
+	p :: Integer -> Integer
+	p n = (1000^n) `div` 8
 
 {- Do you yearn for the days when men were men and megabytes were megabytes? -}
 oldSchoolUnits :: [Unit]
-oldSchoolUnits = zipWith (curry mingle) storageUnits memoryUnits
+oldSchoolUnits = zipWith (curry mingle) storageUnits committeeUnits
   where
 	mingle (Unit _ a n, Unit s' _ _) = Unit s' a n
 
-- 
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