From: Daniel Phillips <phillips@arcor.de>
To: Bill Davidsen <davidsen@tmr.com>
Cc: Andrew Rodland <arodland@noln.com>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH -ac] Panicking in morse code
Date: Fri, 26 Jul 2002 05:43:09 +0200 [thread overview]
Message-ID: <E17Xw0V-0004f8-00@starship> (raw)
In-Reply-To: <Pine.LNX.3.96.1020725084540.11202C-100000@gatekeeper.tmr.com>
On Thursday 25 July 2002 14:51, Bill Davidsen wrote:
> On Fri, 19 Jul 2002, Alan Cox wrote:
>
> > > +static const char * morse[] = {
> > > + ".-", "-...", "-.-.", "-..", ".", "..-.", "--.", "....", /* A-H */
> > > + "..", ".---.", "-.-", ".-..", "--", "-.", "---", ".--.", /* I-P */
> > > + "--.-", ".-.", "...", "-", "..-", "...-", ".--", "-..-", /* Q-X */
> > > + "-.--", "--..", /* Y-Z */
> > > + "-----", ".----", "..---", "...--", "....-", /* 0-4 */
> > > + ".....", "-....", "--...", "---..", "----." /* 5-9 */
> >
> > How about using bitmasks here. Say top five bits being the length, lower
> > 5 bits being 1 for dash 0 for dit ?
>
> ??? If the length is 1..5 I suspect you could use the top two bits and fit
> the whole thing in a byte. But since bytes work well, use the top three
> bits for length without the one bit offset. Still a big win over strings,
> although a LOT harder to get right by eye.
Please read back through the thread and see how 255 different 7 bit codes
complete with lengths can be packed into 8 bits.
--
Daniel
next prev parent reply other threads:[~2002-07-26 3:41 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-07-19 5:13 Andrew Rodland
2002-07-19 5:29 ` William Lee Irwin III
2002-07-19 16:36 ` Thorsten Kranzkowski
2002-07-19 17:00 ` Andrew Rodland
2002-07-19 17:27 ` Eli Carter
2002-07-19 17:32 ` Andrew Rodland
2002-07-19 23:02 ` [PATCH -ac] Panicking in morse code, v2 Andrew Rodland
2002-07-20 10:58 ` Daniel Phillips
2002-07-20 11:19 ` Thunder from the hill
2002-07-20 13:22 ` Ville Herva
2002-07-20 14:18 ` Daniel Phillips
2002-07-20 14:55 ` Tomas Szepe
2002-07-20 16:05 ` Daniel Phillips
2002-07-20 19:51 ` Thunder from the hill
2002-07-20 0:35 ` [PATCH -ac] Panicking in morse code Alan Cox
2002-07-20 0:39 ` Andrew Rodland
2002-07-20 0:48 ` Thunder from the hill
2002-07-25 12:51 ` Bill Davidsen
2002-07-26 3:43 ` Daniel Phillips [this message]
2002-07-26 4:47 ` Daniel Phillips
2002-07-26 4:52 ` jdow
2002-07-26 5:13 ` Daniel Phillips
2002-07-26 13:50 ` Bill Davidsen
2002-07-26 13:38 ` Bill Davidsen
2002-07-26 14:39 ` Richard B. Johnson
2002-07-26 20:09 ` Bill Davidsen
2002-07-26 23:25 ` Jens Schmidt
2002-07-27 2:05 ` Albert D. Cahalan
2002-07-27 4:00 ` Andrew Rodland
[not found] ` <200207270526.g6R5Qw942780@saturn.cs.uml.edu>
2002-07-27 5:57 ` Speaker twiddling [was: Re: Panicking in morse code] Andrew Rodland
2002-07-27 9:46 ` Daniel Phillips
2002-07-27 12:57 ` David D. Hagood
2002-07-27 15:45 ` Andrew Rodland
2002-07-29 17:47 ` Pavel Machek
2002-07-29 22:02 ` Ray Friess
2002-07-29 17:49 ` Pavel Machek
2002-07-29 20:35 ` Albert D. Cahalan
2002-07-29 21:08 ` Pavel Machek
2002-07-27 18:56 ` Albert D. Cahalan
2002-07-27 19:44 ` Ville Herva
2002-07-27 22:40 ` Alan Cox
2002-07-27 21:35 ` Ville Herva
2002-07-31 15:20 ` Thunder from the hill
2002-07-27 21:40 ` Ryan Anderson
2002-07-28 10:26 ` Lars Magne Ingebrigtsen
2002-07-29 20:03 ` Albert D. Cahalan
2002-08-13 17:20 ` Mark H. Wood
2002-07-27 4:04 ` [PATCH -ac] Panicking in morse code Andrew Rodland
2002-07-29 11:50 ` Bill Davidsen
2002-07-29 12:34 ` Richard B. Johnson
2002-07-29 19:57 ` Albert D. Cahalan
2002-07-31 17:54 ` Bill Davidsen
2002-07-20 21:32 ` [PATCH -ac] Panicking in morse code v3 Andrew Rodland
2002-07-21 8:49 ` Brad Hards
2002-07-21 9:08 ` Russell King
2002-07-21 10:50 ` Zwane Mwaikambo
2002-07-21 15:43 ` Daniel Phillips
2002-07-22 17:18 ` Andrew Rodland
[not found] <20020719011300.548d72d5.arodland@noln.com.suse.lists.linux.kernel>
2002-07-19 10:38 ` [PATCH -ac] Panicking in morse code Andi Kleen
2002-07-20 7:05 ` Ville Herva
2002-07-20 11:49 ` Neale Banks
2002-07-20 11:55 ` Thunder from the hill
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