linux-kernel - Re: [PATCH] console UTF-8 fixes

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20070412141306.0c1b6820@the-village.bc.nu>
Date:	Thu, 12 Apr 2007 14:13:06 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Egmont Koblinger <egmont@...linux.hu>
Cc:	"H. Peter Anvin" <hpa@...or.com>,
	Jan Engelhardt <jengelh@...ux01.gwdg.de>,
	Pavel Machek <pavel@....cz>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] console UTF-8 fixes

> So please accept these hard-coded tables in the first round. Maybe one day
> somebody will come up with a better solution. This one should be okay until
> then. (I can also send the script I've written so he can improve it.)

You can pack them a little differently and they'll shrink a lot.

Firstly store
		start, size

Secondly pack the offset as 16 bit with the top 4 bits

		0-3 value
		4 - F
		5 - 1D
		6 - E0

And the size as an 8 bit range. You need to open code the rule for 
20000/30000 but that is tiny anyway.

Unpack is trivial

	start = (toptab[*entry>>4]|(*entry&0x0F)) << 8 | entry[1];
	end = start + entry[2];

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/