added support for parsing compressed qtraces #40
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The code uses archive.h to support reading compressed files. It is based off the old archive support code from before the merging of qtdis into qtreader. I wasn't sure the best way to handle determining whether to read compressed vs. uncompressed so I left that up to the user and added: qtreader_initialize_fd_compressed qtreader_next_record_compressed and assumed the user would call the correct one. Perhaps qtreader_next_record_compressed could be removed, but I wasn't sure how to automatically determine if the qtrace file was compressed and the initialization of the compressed qtreader_state is a bit different. I also added a test5.c that compares an uncompressed (arg1) qtrace to a compressed (arg2) qtrace and ensures that the lengths and records from each are the same. I ran it on a couple qtraces with bz2 compression and it worked. Signed-off-by: Nick Orzol <nrorzol@us.ibm.com>
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I wasn't sure if there is a debug flag that should be used somewhere for the debug print statements I found helpful, so I left them commented out. I also wasn't sure about adding the archive dependency and if it would be desirable to have a flag to enable/disable the feature in compilation. |
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The code uses archive.h to support reading compressed files. It is based off the old archive support code from before the merging of
qtdisintoqtreader.I wasn't sure the best way to handle determining whether to read compressed vs. uncompressed so I left that up to the user and added:
qtreader_initialize_fd_compressedqtreader_next_record_compressedand assumed the user would call the correct one. Perhaps
qtreader_next_record_compressedcould be removed, but I wasn't sure how to automatically determine if the qtrace file was compressed and the initialization of the compressedqtreader_stateis a bit different.I also added a
test5.cthat compares an uncompressed (arg1) qtrace to a compressed (arg2) qtrace and ensures that the lengths and records from each are the same. I ran it on a couple qtraces with bz2 compression and it worked.