From: Corinna Vinschen <vinschen@redhat.com>
To: newlib@sourceware.org
Subject: Re: [PATCH] Modify strnstr.c.
Date: Mon, 28 Aug 2017 14:43:00 -0000 [thread overview]
Message-ID: <20170828133755.GB16010@calimero.vinschen.de> (raw)
In-Reply-To: <48efb3a4-e8df-506f-7e0d-1ca4d5d9ea5f@qq.com>
[-- Attachment #1: Type: text/plain, Size: 2087 bytes --]
On Aug 28 18:50, Sichen Zhao wrote:
> > On Aug 26 21:28, Sichen Zhao wrote:
> > > ---
> > > newlib/libc/string/strnstr.c | 24 ++++++++----------------
> > > 1 file changed, 8 insertions(+), 16 deletions(-)
> > >
> > > diff --git a/newlib/libc/string/strnstr.c b/newlib/libc/string/strnstr.c
> > > index da5e5bd..7c87bbd 100644
> > > --- a/newlib/libc/string/strnstr.c
> > > +++ b/newlib/libc/string/strnstr.c
> > > @@ -44,22 +44,14 @@ __FBSDID("$FreeBSD: head/lib/libc/string/strnstr.c 251069 2013-05-28 20:57:40Z e
> > > * first slen characters of s.
> > > */
> > > char *
> > > -strnstr(const char *s, const char *find, size_t slen)
> > > +strnstr(const char *haystack, const char *needle, size_t haystack_len)
> > > {
> > > - char c, sc;
> > > - size_t len;
> > > + size_t needle_len = strnlen(needle, haystack_len);
> > > - if ((c = *find++) != '\0') {
> > > - len = strlen(find);
> > > - do {
> > > - do {
> > > - if (slen-- < 1 || (sc = *s++) == '\0')
> > > - return (NULL);
> > > - } while (sc != c);
> > > - if (len > slen)
> > > - return (NULL);
> > > - } while (strncmp(s, find, len) != 0);
> > > - s--;
> > > - }
> > > - return ((char *)s);
> > > + if (needle_len < haystack_len || !needle[needle_len]) {
> > > + char *x = memmem(haystack, haystack_len, needle, needle_len);
> > > + if (x && !memchr(haystack, 0, x - haystack))
> > > + return x;
> > > + }
> > > + return NULL;
> > > }
> > > --
> > > 2.7.4
> > Input needed:
> >
> > Given this is a complete reimplementation not based on FreeBSD code at
> > all, and given the code has been contributed by Eric, shouldn't we
> > remove the entire copyright header and move this under newlib default
> > licensing?
> Including remove the "__FBSDID("$FreeBSD: head/lib/libc/string/strnstr.c
> 251069 2013-05-28 20:57:40Z emaste $");", right?
Yes, that would make sense in that case I think. But wait until
we have some input from Eric at least.
Thanks,
Corinna
--
Corinna Vinschen
Cygwin Maintainer
Red Hat
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 819 bytes --]
next prev parent reply other threads:[~2017-08-28 13:38 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-28 8:38 Sichen Zhao
2017-08-28 8:57 ` Corinna Vinschen
2017-08-28 10:50 ` Sichen Zhao
2017-08-28 13:38 ` Sichen Zhao
2017-08-28 14:43 ` Corinna Vinschen [this message]
2017-08-28 15:15 ` Eric Blake
2017-08-28 15:32 ` Sichen Zhao
2017-08-28 16:09 ` Corinna Vinschen
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=20170828133755.GB16010@calimero.vinschen.de \
--to=vinschen@redhat.com \
--cc=newlib@sourceware.org \
/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.
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 read-only IMAP folder(s) and NNTP newsgroup(s).