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ZIP_SET_FILE_COMPRESSION(3)Library Functions ManualZIP_SET_FILE_COMPRESSION(3)

NAME
       zip_set_file_compression - set compression method for file in zip

LIBRARY
       libzip (-lzip)

SYNOPSIS
       zip.h  int  zip_set_file_compression  zip_t *archive zip_uint64_t index
       zip_int32_t comp zip_uint32_t comp_flags

DESCRIPTION
       The zip_set_file_compression function sets the compression  method  for
       the file at position index in the zip archive to comp with the compres‐
       sion method specific comp_flags.	 The comp is the same as  returned  by
       zip_stat(3).   For the comp argument, currently only the following val‐
       ues are supported:

       ZIP_CM_DEFAULT
	      default compression; currently the same as ZIP_CM_DEFLATE.

       ZIP_CM_STORE
	      Store the file uncompressed.

       ZIP_CM_DEFLATE
	      Deflate the file with the zlib(3) algorithm and default options

       The comp_flags argument is currently ignored.

       The current compression method for a file  in  a	 zip  archive  can  be
       determined using zip_stat(3).

RETURN VALUES
       Upon  successful	 completion  0 is returned.  Otherwise, -1 is returned
       and the error information in archive is set to indicate the error.

ERRORS
       zip_set_file_compression fails if:

       [ZIP_ER_INVAL]	index is not a valid file index	 in  archive,  or  the
			argument combination is invalid.

       [ZIP_ER_COMPNOTSUPP]
			Unsupported compression method requested.

       [ZIP_ER_RDONLY]	Read-only zip file, no changes allowed.

SEE ALSO
       libzip(3), zip_stat(3)

AUTHORS
       Dieter Baron <dillo@nih.at> and Thomas Klausner <tk@giga.or.at>

NiH				  May 1, 2012	   ZIP_SET_FILE_COMPRESSION(3)

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