In approx, I just use a Sys.command call to decompress to a temporary
file and then open that.  It has these benefits:
  * for gzip at least, it's faster than camlzip
  * easily detects corrupted files (reading the output stream of a
    decompressor doesn't do that until it's too late)
  * easy to change compression schemes or support multiple ones based
    on file extension, say

--
Eric Cooper             e c c @ c m u . e d u

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