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download: 'tls-wrap' avoids intermediate buffer.

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* guix/build/download.scm (tls-wrap)[read!]: Read straight into BV
instead of calling 'get-bytevector-some' and 'unget-bytevector'.
This commit is contained in:
Ludovic Courtès 2021-03-10 22:51:47 +01:00
parent ebd5000263
commit 279d932b1c
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GPG key ID: 090B11993D9AEBB5
1 changed files with 5 additions and 10 deletions
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15
guix/build/download.scm
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@ -1,5 +1,5 @@
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2015 Mark H Weaver <mhw@netris.org>
;;; Copyright © 2017 Tobias Geerinckx-Rice <me@tobias.gr>
;;;
@ -28,7 +28,6 @@ (define-module (guix build download)
#:use-module (guix build utils)
#:use-module (guix progress)
#:use-module (rnrs io ports)
#:use-module ((ice-9 binary-ports) #:select (unget-bytevector))
#:use-module (rnrs bytevectors)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-11)
@ -306,14 +305,10 @@ (define (log level str)
(let ((record (session-record-port session)))
(define (read! bv start count)
(define read-bv (get-bytevector-some record))
(if (eof-object? read-bv)
0 ; read! returns 0 on eof-object
(let ((read-bv-len (bytevector-length read-bv)))
(bytevector-copy! read-bv 0 bv start (min read-bv-len count))
(when (< count read-bv-len)
(unget-bytevector record bv count (- read-bv-len count)))
read-bv-len)))
(let ((read (get-bytevector-n! record bv start count)))
(if (eof-object? read)
0
read)))
(define (write! bv start count)
(put-bytevector record bv start count)
(force-output record)