At 12:00am -0800 00-12-02, Palm Developer Forum digest wrote:
>Subject: Re: RLE compression
>From: "Richard M. Hartman" <[EMAIL PROTECTED]>
>Date: Fri, 1 Dec 2000 16:55:25 -0800
>X-Message-Number: 73
>
>
>
>Denis Faivre wrote in message <31325@palm-dev-forum>...
>...
> >I had seen your post and definition of RLE : "The RLE compression is a
> >simple sequence of <repeat count><byte of data>, where the repeat count
>byte
> >will be 1...255."
> >
> >However I wondered if Palm somehow confirmed that PalmOS implementation
> >follows this definition.
> >
>
>So for non-repeating byte sequences you double them in length, e.g.
>sequence: 0x01 0x02 0x03 0x04
>result: 0x01 0x01 0x01 0x02 0x01 0x03 0x01 0x04
>??
>
>Most RLE schemes I am familiar with have a code that says "the next
>N bytes are to be read as-is", frequently the high-bit. Thererefore the
>result for my example could be: 0x84 0x01 0x02 0x03 0x04
>
> Now ... which way does Palm do it?
RLE doesn't have any special support for encoding non-repeating bytes
more efficiently (though it should).
-- Ken
Ken Krugler
TransPac Software, Inc.
<http://www.transpac.com>
+1 530-470-9200
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