From: Rich Felker <dalias@libc.org>
To: musl@lists.openwall.com
Subject: Re: [setlocale]: return only one copy if all six parts of locale are same
Date: Sat, 18 Mar 2017 10:39:54 -0400 [thread overview]
Message-ID: <20170318143954.GP1693@brightrain.aerifal.cx> (raw)
In-Reply-To: <CAPG2z08Z2V08wQPT0EN27Fgc97Ac14VNxQXQOjsfC2oK2+wz0Q@mail.gmail.com>
[-- Attachment #1: Type: text/plain, Size: 561 bytes --]
On Sat, Mar 18, 2017 at 09:48:41PM +0800, He X wrote:
> oops, i missed UNLOCK(lock).
>
> [...]
> >>
> >> I think the results of this patch can be achieved much more simply.
> >> Just compare lm pointers (rather than string contents) for equality at
> >> each iteration in the current loop, counting how many were equal to
> >> libc.global_locale.cat[0]. If that number equals LC_ALL, return
> >> libc.global_locale.cat[0]->name (or "C" if the lm is null) rather than
> >> buf.
> >>
> >> Rich
> >>
> >
> >
By simpler I meant something like the attached.
Rich
[-- Attachment #2: setlocale.diff --]
[-- Type: text/plain, Size: 774 bytes --]
diff --git a/src/locale/setlocale.c b/src/locale/setlocale.c
index 8dae5a4..ca1646f 100644
--- a/src/locale/setlocale.c
+++ b/src/locale/setlocale.c
@@ -48,10 +48,13 @@ char *setlocale(int cat, const char *name)
}
}
char *s = buf;
+ const char *part;
+ int same = 0;
for (i=0; i<LC_ALL; i++) {
const struct __locale_map *lm =
libc.global_locale.cat[i];
- const char *part = lm ? lm->name : "C";
+ if (lm == libc.global_locale.cat[0]) same++;
+ part = lm ? lm->name : "C";
size_t l = strlen(part);
memcpy(s, part, l);
s[l] = ';';
@@ -59,7 +62,7 @@ char *setlocale(int cat, const char *name)
}
*--s = 0;
UNLOCK(lock);
- return buf;
+ return same==LC_ALL ? part : buf;
}
char *ret = setlocale_one_unlocked(cat, name);
next prev parent reply other threads:[~2017-03-18 14:39 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-18 7:37 He X
2017-03-18 12:33 ` Rich Felker
2017-03-18 13:36 ` He X
2017-03-18 13:48 ` He X
2017-03-18 14:39 ` Rich Felker [this message]
2017-03-18 15:00 ` He X
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20170318143954.GP1693@brightrain.aerifal.cx \
--to=dalias@libc.org \
--cc=musl@lists.openwall.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this public inbox
https://git.vuxu.org/mirror/musl/
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).