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Source for ticket #464
cc
changetime
2012-10-07 12:39:38
component
WG1 - Core
description
In response Marijn's message below, I'm adding a proposal to the ballot
that we support optional start and end parameters to `utf8->string` and
to `string->utf8`.
Date: Fri, 13 Jul 2012 09:51:10 +0200
From: Marijn <hkBst@gentoo.org>
Subject: [Scheme-reports] decoding strings from bytevectors
Hi,
I recently ran into this minor issue writing some R6RS code and would
like to know how R7RS addresses it.
Say you want to extract a string from a bytevector, but the bytevector
contains other information before and after the bytes that encode the
string data. In R6RS, AFAIK, you have to copy those bytes to a new
bytevector and then decode that entire bytevector to a string
(probably causing another copy operation). I think it would be useful
if something like
(define (string-decoder bytevector position length transcoder
(bytevector->string
(let ((bv (make-bytevector length)))
(bytevector-copy!
bytevector position bv 0 length)
bv)
transcoder) )
were supported directly by bytevector->string without the additional
bytevector-copy.
Marijn
id
464
keywords
milestone
owner
cowan
priority
major
reporter
aag
resolution
fixed
severity
status
closed
summary
Add optional start and end parameters to utf8->string and string->utf8.
time
2012-07-15 12:47:53
type
defect
Changes
Change at time 2012-10-07 12:39:38
author
cowan
field
comment
newvalue
oldvalue
3
raw-time
1349588378938583
ticket
464
time
2012-10-07 12:39:38
Change at time 2012-10-07 12:39:38
author
cowan
field
resolution
newvalue
fixed
oldvalue
raw-time
1349588378938583
ticket
464
time
2012-10-07 12:39:38
Change at time 2012-10-07 12:39:38
author
cowan
field
status
newvalue
closed
oldvalue
writing
raw-time
1349588378938583
ticket
464
time
2012-10-07 12:39:38
Change at time 2012-08-27 04:01:47
author
cowan
field
comment
newvalue
oldvalue
2
raw-time
1346014907128695
ticket
464
time
2012-08-27 04:01:47
Change at time 2012-08-27 04:01:47
author
cowan
field
owner
newvalue
cowan
oldvalue
alexshinn
raw-time
1346014907128695
ticket
464
time
2012-08-27 04:01:47
Change at time 2012-08-27 04:01:47
author
cowan
field
status
newvalue
writing
oldvalue
decided
raw-time
1346014907128695
ticket
464
time
2012-08-27 04:01:47
Change at time 2012-08-27 00:51:14
author
cowan
field
comment
newvalue
WG1 voted to adopt this change for both procedures.
oldvalue
1
raw-time
1346003474271769
ticket
464
time
2012-08-27 00:51:14
Change at time 2012-08-27 00:51:14
author
cowan
field
status
newvalue
decided
oldvalue
new
raw-time
1346003474271769
ticket
464
time
2012-08-27 00:51:14