From: Karel Zak <kzak@redhat.com>
To: Davidlohr Bueso <dave@gnu.org>
Cc: util-linux <util-linux@vger.kernel.org>
Subject: Re: [PATCH] lists: add list sorting routine
Date: Fri, 16 Dec 2011 12:42:18 +0100 [thread overview]
Message-ID: <20111216114218.GA25969@nb.net.home> (raw)
In-Reply-To: <1323730346.2536.3.camel@offbook>
On Mon, Dec 12, 2011 at 11:52:26PM +0100, Davidlohr Bueso wrote:
> include/c.h | 8 +++
> include/list.h | 132 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> 2 files changed, 140 insertions(+), 0 deletions(-)
Applied, thanks.
> + struct list_head *part[MAX_LIST_LENGTH_BITS+1]; /* sorted partial lists
> + -- last slot is a sentinel */
> + int lev; /* index into part[] */
> + int max_lev = 0;
size_t
> + struct list_head *list;
> +
> + if (list_empty(head))
> + return;
> +
> + memset(part, 0, sizeof(part));
> +
> + head->prev->next = NULL;
> + list = head->next;
> +
> + while (list) {
> + struct list_head *cur = list;
> + list = list->next;
> + cur->next = NULL;
> +
> + for (lev = 0; part[lev]; lev++) {
> + cur = merge(cmp, part[lev], cur);
> + part[lev] = NULL;
> + }
> + if (lev > max_lev) {
> + /* list passed to list_sort() too long for efficiency */
> + if (lev >= ARRAY_SIZE(part)-1)
use -Wsign-compare to get more fun :-)
Karel
--
Karel Zak <kzak@redhat.com>
http://karelzak.blogspot.com
prev parent reply other threads:[~2011-12-16 11:42 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-12 22:52 [PATCH] lists: add list sorting routine Davidlohr Bueso
2011-12-12 22:55 ` Davidlohr Bueso
2011-12-13 9:26 ` Karel Zak
2011-12-13 10:56 ` Davidlohr Bueso
2011-12-13 11:46 ` Karel Zak
2011-12-16 11:42 ` Karel Zak [this message]
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