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Hi,Starwolf20 wrote:Hi Gnozal
The 1er post says that PureZip uses Zlib V1.23.
The ZLIB website says that the last version is V1.25. Is an update of PureZip planned ?
Thanks
You can't !User_Russian wrote:How can I add to ZIP Archive, an empty folder (which does not contain any files) by using the PureZIP_Archive_Compress?
I create self-extracting (SFX) archive, usinggnozal wrote:You can't !User_Russian wrote:How can I add to ZIP Archive, an empty folder (which does not contain any files) by using the PureZIP_Archive_Compress?
However, you may use PureZIP_AddFiles() with #PureZIP_RecursiveZeroDirs flag to store empty folders.
But do not use this function within a PureZIP_Archive_Create() / PureZIP_Archive_Close() sequence.
Code: Select all
PureZIP_Archive_Create(ArchiveFileName.s, #APPEND_STATUS_CREATEAFTER)User_Russian wrote:I create self-extracting (SFX) archive, usingCode: Select all
PureZIP_Archive_Create(ArchiveFileName.s, #APPEND_STATUS_CREATEAFTER). Therefore, the function PureZIP_AddFiles () can not be used. What should do?[/quote] You can create the archive ("archive.zip") and then add the sfx stub ("archive.sfx"). You may use the console (COPY /B archive.sfx+archive.zip archive.exe) or purebasic's file functions.
PureZIP (ZLIB) should support archive sizes up to 2GB.besko wrote:Gnozal, what about archive size ? Can we rise these nums?
You may use PureZIP_SetCompressionAlgorithm() to choose between #Z_NO_COMPRESSION and #Z_DEFLATED.c4s wrote:Is it possible to set the compression level and if not could you please add it?
In a (PKZIP 2.04g) ZIP archive, the filenames are stored as OEM (MS-DOS, remember ?). ZLIB does not support the unicode extensions, and every packer has another method to store unicode file names (unicode filenames as UTF-8 : Pkzip 4.5/Winzip 11.2 method, unicode filename in extra field : Info-Zip method, etc...).c4s wrote:Also you wrote somewhere that Unicode isn't properly supported. What does that exactly mean?
Users (!) sometimes like to have control over something, even if it doesn't make sense in a programmers point of view. Please just add it to PureZIP_SetCompressionAlgorithm()... I would highly appreciate it!gnozal wrote:You may use PureZIP_SetCompressionAlgorithm() to choose between #Z_NO_COMPRESSION and #Z_DEFLATED.
As #Z_DEFLATED is so fast, PureZIP always uses #Z_BEST_COMPRESSION. There is no point using any other compression level.
OK, but what does that mean for PureZIP? Is Unicode supported in some way?gnozal wrote:In a (PKZIP 2.04g) ZIP archive, the filenames are stored as OEM (MS-DOS, remember ?). ZLIB does not support the unicode extensions, and every packer has another method to store unicode file names (unicode filenames as UTF-8 : Pkzip 4.5/Winzip 11.2 method, unicode filename in extra field : Info-Zip method, etc...).
If you open a ZIP file with 7-ZIP and check the properties, you only get the algorithm (Deflate), but not the compression level. And if you want to create a ZIP file, you have 6 generic compression level options that do not have any meaning, as DEFLATE only has 2 levels (Z_BEST_SPEED and Z_BEST_COMPRESSION)!c4s wrote:Users (!) sometimes like to have control over something, even if it doesn't make sense in a programmers point of view. Please just add it to PureZIP_SetCompressionAlgorithm()... I would highly appreciate it!
The unicode version of PureZIP translates unicode to OEM and vice-versa. It works, but it is not 'true' unicode support...c4s wrote:OK, but what does that mean for PureZIP? Is Unicode supported in some way?
I have no idea. I only know that the genuine PKZIP 2.04g archive format does not support unicode, and that some modern archivers use a workaround to store unicode filenames (see my previous post).c4s wrote:As far as I remember Microsoft added Zip support to the Windows Explorer in XP. Was it possible to create Zip folders as well? If so, do you know how they managed this issue?
Wikipedia about Deflate says: "Options range from -0 (do not attempt compression, just store uncompressed) to -9 representing the maximum capability of the reference implementation in zlib/gzip."gnozal wrote:If you open a ZIP file with 7-ZIP and check the properties, you only get the algorithm (Deflate), but not the compression level. And if you want to create a ZIP file, you have 6 generic compression level options that do not have any meaning, as DEFLATE only has 2 levels (Z_BEST_SPEED and Z_BEST_COMPRESSION)!
So if the user is pleased with meaningless options, just add a trackbar that does nothing... as only 2 options may no satisfy him !
I case it's not meant ironically, thank you.gnozal wrote:Anyway, I may add PureZIP_SetCompressionLevel() in a future version ... to please my users !
Thanks for explaining!gnozal wrote:The unicode version of PureZIP translates unicode to OEM and vice-versa. It works, but it is not 'true' unicode support...
There are two constants, #Z_BEST_SPEED = 1 and #Z_BEST_COMPRESSION = 9, so I guess values 2-8 are valid, never tried it though.c4s wrote:Wikipedia about Deflate says: "Options range from -0 (do not attempt compression, just store uncompressed) to -9 representing the maximum capability of the reference implementation in zlib/gzip."
See below..c4s wrote:I case it's not meant ironically, thank you.