Re: [Boost-users] Seekg on a gzip'd file...Is this possible?

I'd actually like to "skip" (move forward) in the stream. "Rewind" functionality would not be necessary. As I stated earlier, I'm porting code from java to c++ that has this functionality via java.util.zip.GZIPInputStream. My desired functionality would be something like this: 1) read some header info 2) read meta data that tells me which parts of the data I care about 3) Continue read through file sequentially: a) extract needed data as it is encountered b) use meta data to skipping over unneeded data to the next set of needed data. So maybe a "skip" method would be appropriate? Gerrick On 3/13/09 11:05 PM, "Cory Nelson" wrote:

On Fri, Mar 13, 2009 at 7:59 PM, Gerrick Bivins wrote:

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Hi Steven, Thanks for the response. Does that mean that the gzip_decompressor in boost doesn't' support seeking or does gzip in general not support seekeing? Any suggestions for working around this problem? Gerrick

Gzip steams can only move forward. I see no reason why at least this couldn't be supported other than most people expect seek to be instant, whereas gzip will have to decompress all the way to that point. Does seek have some complexity requirements that make this a bad idea?