7-Zip 4.52 beta

A big THANK YOU for the MSI unpacking! I've been hoping for that feature for years...

what?? .doc files??

are you meaning that .doc files are compressed files??

could you explain this, please?

thanks

Hmm, well I know .odt (OpenOffice text) files are compressed XML files.  Not so sure about .doc, but maybe when images are embedded?  Too lazy to check.  :-P

I bet the new Word format, .docx, is compressed though, since it was basically made to compete with .odt.

I think it has little to do with compression and more with the fact that a .doc file may contain images as well as other embedded objects alongside the text and can be therefore thought of as a kind of archive.

If I am not mistaken latest doc files are themselves an XML format, but different from the OASIS standard used in OpenOffice.org documents.

Compound files don't use compression.

http://en.wikipedia.org/wiki/Compound_File_Binary_Format

Compound File Binary Format (CFBF) is a format originally developed by Microsoft for on-disk storage of data using the IStorage COM object and the OLE32 StgCreateStorageEx, StgOpenStorageEx, etc API calls.

At its simplest the Compound File Binary Format is a container, with little restriction on what can be stored within it.

Internally a CFBF file loosely resembles a FAT filesytem. The file is partitioned into Sectors which are chained together with a File Allocation Table (FAT, aka Sector Allocation Table for disambiguation) which contains chains of sectors related to each file, a Directory holds information for contained files with a Sector ID (SID) for the starting sector of a FAT chain and so on.

wow!

i didn´t know anything about that!

thank you very much for that information!

Thanks very much for new build, Igor!
Great new features! I'll begin testing with latest beta.

thanks igor..

you done it ... after requesting it since two years..

i wish you add "docprs" feature to 7-zip (the new features like msi chm support)

take your time making your masterpiece

7-zip does not identify the xls doc in right click to allow extract.. so i have to run the FM then "open inside" then i could extract what i want..

Dear Igor, could you make 7-zip handle doc,xls,..etc as an archive file so you can extract multiple files in one click like what we can do archives..

thanks

early performance tests:
ICC /QxP /O3 /Qipo:
7-Zip 4.52 beta  Copyright (c) 1999-2007 Igor Pavlov  2007-08-03

RAM size:    2045 MB,  # CPU hardware threads:   2
RAM usage:    850 MB,  # Benchmark threads:      4

Dict        Compressing          |        Decompressing
      Speed Usage    R/U Rating  |    Speed Usage    R/U Rating
       KB/s     %   MIPS   MIPS  |     KB/s     %   MIPS   MIPS

22:    2730   196   1356   2656  |    27389   196   1522   2987
23:    2661   195   1389   2712  |    26454   196   1493   2923
24:    2536   195   1398   2727  |    26382   195   1509   2951
25:    2467   194   1453   2817  |    26048   196   1506   2950
----------------------------------------------------------------
Avr:          195   1399   2728               196   1508   2953
Tot:          195   1453   2840

original build:
7-Zip 4.52 beta  Copyright (c) 1999-2007 Igor Pavlov  2007-08-03

RAM size:    2045 MB,  # CPU hardware threads:   2
RAM usage:    850 MB,  # Benchmark threads:      4

Dict        Compressing          |        Decompressing
      Speed Usage    R/U Rating  |    Speed Usage    R/U Rating
       KB/s     %   MIPS   MIPS  |     KB/s     %   MIPS   MIPS

22:    2584   196   1285   2514  |    25535   198   1403   2785
23:    2322   180   1313   2366  |    25028   196   1408   2765
24:    2468   197   1349   2653  |    24396   194   1409   2729
25:    2350   195   1373   2683  |    24576   198   1409   2783
----------------------------------------------------------------
Avr:          192   1330   2554               196   1407   2766
Tot:          194   1369   2660

I think I'll complete it in Monday.
Best regards,