121 lines
3.5 KiB
Text
121 lines
3.5 KiB
Text
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.\" zip_source_zip.mdoc -- create data source from zip file
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.\" Copyright (C) 2004-2017 Dieter Baron and Thomas Klausner
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.\"
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.\" This file is part of libzip, a library to manipulate ZIP archives.
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.\" The authors can be contacted at <libzip@nih.at>
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in
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.\" the documentation and/or other materials provided with the
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.\" distribution.
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.\" 3. The names of the authors may not be used to endorse or promote
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.\" products derived from this software without specific prior
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.\" written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
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.\" OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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.\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
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.\" DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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.\" GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
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.\" IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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.\" OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
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.\" IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd December 18, 2017
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.Dt ZIP_SOURCE_ZIP 3
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.Os
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.Sh NAME
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.Nm zip_source_zip
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.Nd create data source from zip file
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.Sh LIBRARY
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libzip (-lzip)
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.Sh SYNOPSIS
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.In zip.h
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.Ft zip_source_t *
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.Fn zip_source_zip "zip_t *archive" "zip_t *srcarchive" "zip_uint64_t srcidx" "zip_flags_t flags" "zip_uint64_t start" "zip_int64_t len"
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.Sh DESCRIPTION
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The function
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.Fn zip_source_zip
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creates a zip source from a file in a zip archive.
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The
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.Ar srcarchive
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argument is the (open) zip archive containing the source zip file
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at index
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.Ar srcidx .
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.Ar len
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bytes from offset
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.Ar start
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will be used in the zip_source.
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If
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.Ar len
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is 0 or \-1, the rest of the file, starting from
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.Ar start ,
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is used.
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If
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.Ar start
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is zero and
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.Ar len
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is \-1, the whole file will be copied without decompressing it.
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.Pp
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Supported flags are:
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.Bl -tag -width XZIPXFLXRECOMPRESSXXX
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.It Dv ZIP_FL_UNCHANGED
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Try to get the original data without any changes that may have been
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made to
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.Ar srcarchive
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after opening it.
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.It Dv ZIP_FL_RECOMPRESS
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When adding the data from
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.Ar srcarchive ,
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re-compress it using the current settings instead of copying the
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compressed data.
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.El
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.Sh RETURN VALUES
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Upon successful completion, the created source is returned.
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Otherwise,
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.Dv NULL
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is returned and the error code in
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.Ar archive
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is set to indicate the error.
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.Sh ERRORS
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.Fn zip_source_zip
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fails if:
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.Bl -tag -width Er
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.It Bq Er ZIP_ER_CHANGED
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Unchanged data was requested, but it is not available.
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.It Bq Er ZIP_ER_INVAL
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.Ar srcarchive ,
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.Ar srcidx ,
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.Ar start ,
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or
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.Ar len
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are invalid.
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.It Bq Er ZIP_ER_MEMORY
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Required memory could not be allocated.
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.El
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Additionally, it can return all error codes from
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.Fn zip_stat_index
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and
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.Fn zip_fopen_index .
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.Sh SEE ALSO
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.Xr libzip 3 ,
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.Xr zip_file_add 3 ,
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.Xr zip_file_replace 3 ,
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.Xr zip_source 3
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.Sh HISTORY
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.Fn zip_source_zip
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was added in libzip 1.0.
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.Sh AUTHORS
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.An -nosplit
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.An Dieter Baron Aq Mt dillo@nih.at
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and
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.An Thomas Klausner Aq Mt tk@giga.or.at
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