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2009.04.30 13:58 "Re: Packbits worst case encoded length", by Toby Thain
On 30-Apr-09, at 3:41 AM, Albert Cahalan wrote: > On Wed, Apr 29, 2009 at 10:28 AM, Toby Thain > <toby@telegraphics.com.au> wrote: >> On 26-Apr-09, at 1:22 PM, Simon Berger wrote: > (Attribution is incorrect, I wrote the lines you're quoting.) >> If you need your code to be robust against corrupt input then you >> should stop decompressing when the row is full, though of course you >> will lose sync with the input. > > There is no "if". There must be a lot of code out there that assumes good input. And if you're writing a quick hack, not a general purpose library, you might choose to do the same (hence "if"). Since the RLE code I have written could be used in scavenging a bad file, naturally I used one or more of the strategies you mention. (Relying on memory protection to save you is not a portable strategy, so again unsuitable for a general purpose library.) --Toby > > If the row doesn't come out even, you have 4 choices: > ...