On Thu, 18 Feb 2010 20:08:22 +0000, Ted MacNEIL wrote: >>"zip" format may not be decompressable by all products that claim "zip" >>compatibility and there may be differences in the implementation on different >>hosts). >> Of course there may also be translation issues to work out too. > >May. May! May? > >Do you have any specifics? > >I've worked at many shops using variouse ZIP products. > >There were few, if any, issues. > >You test things. >You don't rely on 'may'. > Lately, zipping tools have mostly settled on the "Deflate" codec as a de-facto standard. Even gunzip will extract zip archives containing exactly one file and using Deflate. Older tools may use older techniques, and even mix techniques depending on data statistics (most frequently, in the archive TOC, you see a mixture of "deflated" and "stored").
So, even testing doesn't protect absolutely against that idiosyncratic data set that triggers a different codec. I know no zip tool that lets the programmer direct the selection of codec. -- gil ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
