man/zip_source_zip.man

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.\" zip_source_zip.mdoc -- create data source from zip file
.\" Copyright (C) 2004-2019 Dieter Baron and Thomas Klausner
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.TH "ZIP_SOURCE_ZIP" "3" "December 18, 2017" "NiH" "Library Functions Manual"
.nh
.if n .ad l
.SH "NAME"
\fBzip_source_zip\fR
\- create data source from zip file
.SH "LIBRARY"
libzip (-lzip)
.SH "SYNOPSIS"
\fB#include <zip.h>\fR
.sp
\fIzip_source_t *\fR
.br
.PD 0
.HP 4n
\fBzip_source_zip\fR(\fIzip_t\ *archive\fR, \fIzip_t\ *srcarchive\fR, \fIzip_uint64_t\ srcidx\fR, \fIzip_flags_t\ flags\fR, \fIzip_uint64_t\ start\fR, \fIzip_int64_t\ len\fR);
.PD
.SH "DESCRIPTION"
The function
\fBzip_source_zip\fR()
creates a zip source from a file in a zip archive.
The
\fIsrcarchive\fR
argument is the (open) zip archive containing the source zip file
at index
\fIsrcidx\fR.
\fIlen\fR
bytes from offset
\fIstart\fR
will be used in the zip_source.
If
\fIlen\fR
is 0 or \-1, the rest of the file, starting from
\fIstart\fR,
is used.
If
\fIstart\fR
is zero and
\fIlen\fR
is \-1, the whole file will be copied without decompressing it.
.PP
Supported flags are:
.TP 23n
\fRZIP_FL_UNCHANGED\fR
Try to get the original data without any changes that may have been
made to
\fIsrcarchive\fR
after opening it.
.TP 23n
\fRZIP_FL_RECOMPRESS\fR
When adding the data from
\fIsrcarchive\fR,
re-compress it using the current settings instead of copying the
compressed data.
.SH "RETURN VALUES"
Upon successful completion, the created source is returned.
Otherwise,
\fRNULL\fR
is returned and the error code in
\fIarchive\fR
is set to indicate the error.
.SH "ERRORS"
\fBzip_source_zip\fR()
fails if:
.TP 19n
[\fRZIP_ER_CHANGED\fR]
Unchanged data was requested, but it is not available.
.TP 19n
[\fRZIP_ER_INVAL\fR]
\fIsrcarchive\fR,
\fIsrcidx\fR,
\fIstart\fR,
or
\fIlen\fR
are invalid.
.TP 19n
[\fRZIP_ER_MEMORY\fR]
Required memory could not be allocated.
.PD 0
.PP
Additionally, it can return all error codes from
\fBzip_stat_index\fR()
and
\fBzip_fopen_index\fR().
.PD
.SH "SEE ALSO"
libzip(3),
zip_file_add(3),
zip_file_replace(3),
zip_source(3)
.SH "HISTORY"
\fBzip_source_zip\fR()
was added in libzip 1.0.
.SH "AUTHORS"
Dieter Baron <\fIdillo@nih.at\fR>
and
Thomas Klausner <\fItk@giga.or.at\fR>