From: Steve Sprang <steve.sprang@gmail.com>
To: guix-devel@gnu.org
Subject: [PATCH] build: Fix potential type error when generating human-friendly byte count strings.
Date: Wed, 9 Sep 2015 14:05:35 -0700 [thread overview]
Message-ID: <CA+xn8YCMk5tJjB_rEFEPwWm4ef3enCuRJ03PR1f8bH8TvGrUwQ@mail.gmail.com> (raw)
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This is a follow up tweak to my previous "progress bar" patch. With a
really slow throughput it's possible to get fractional sub-KiB byte counts,
so I added some additional number massaging.
-Steve
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[-- Attachment #2: type-fix.patch --]
[-- Type: text/x-patch, Size: 1972 bytes --]
From daccd58e5fbe366ebcd33092f70ca45bc79285e0 Mon Sep 17 00:00:00 2001
From: Steve Sprang <scs@stevesprang.com>
Date: Wed, 9 Sep 2015 13:59:52 -0700
Subject: [PATCH] build: Fix potential type error when generating
human-friendly byte count strings.
* guix/build/download.scm (number->integer): New function.
(seconds->string): Use new rounding function.
(byte-count->string): Use new rounding function.
---
guix/build/download.scm | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/guix/build/download.scm b/guix/build/download.scm
index 6e85174..a0b8d92 100644
--- a/guix/build/download.scm
+++ b/guix/build/download.scm
@@ -49,6 +49,10 @@
;; Size of the HTTP receive buffer.
65536)
+(define (number->integer n)
+ "Given an arbitrary number N, round it and return the exact result."
+ (inexact->exact (round n)))
+
(define (duration->seconds duration)
"Return the number of seconds represented by DURATION, a 'time-duration'
object, as an inexact number."
@@ -60,7 +64,7 @@ object, as an inexact number."
format."
(if (not (number? duration))
"00:00:00"
- (let* ((total-seconds (inexact->exact (round duration)))
+ (let* ((total-seconds (number->integer duration))
(extra-seconds (modulo total-seconds 3600))
(hours (quotient total-seconds 3600))
(mins (quotient extra-seconds 60))
@@ -75,8 +79,8 @@ way."
(GiB (expt 1024. 3))
(TiB (expt 1024. 4)))
(cond
- ((< size KiB) (format #f "~dB" (inexact->exact size)))
- ((< size MiB) (format #f "~dKiB" (inexact->exact (round (/ size KiB)))))
+ ((< size KiB) (format #f "~dB" (number->integer size)))
+ ((< size MiB) (format #f "~dKiB" (number->integer (/ size KiB))))
((< size GiB) (format #f "~,1fMiB" (/ size MiB)))
((< size TiB) (format #f "~,2fGiB" (/ size GiB)))
(else (format #f "~,3fTiB" (/ size TiB))))))
--
2.5.0
next reply other threads:[~2015-09-09 21:05 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-09 21:05 Steve Sprang [this message]
2015-09-10 2:42 ` [PATCH] build: Fix potential type error when generating human-friendly byte count strings Mark H Weaver
2015-09-10 3:31 ` Steve Sprang
2015-09-15 3:27 ` Steve Sprang
2015-09-15 3:40 ` Mark H Weaver
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