.\" Converted with mdoc2man 0.2
.\" from NiH: zip_source_zip.mdoc,v 1.8 2005/07/29 14:13:25 dillo Exp 
.\" $NiH: zip_source_zip.mdoc,v 1.8 2005/07/29 14:13:25 dillo Exp $
.\"
.\" zip_source_zip.mdoc \-- create data source from zip file
.\" Copyright (C) 2004, 2005 Dieter Baron and Thomas Klausner
.\"
.\" This file is part of libzip, a library to manipulate ZIP archives.
.\" The authors can be contacted at <nih@giga.or.at>
.\"
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.TH ZIP_SOURCE_ZIP 3 "July 29, 2005" NiH
.SH "NAME"
zip_source_zip \- create data source from zip file
.SH "LIBRARY"
libzip (-lzip)
.SH "SYNOPSIS"
.In zip.h
.Ft struct zip_source *
.Fn zip_source_zip "struct zip *archive" "struct zip *srcarchive" \
"int srcidx" "int flags" "off_t start" "off_t len"
.SH "DESCRIPTION"
The function
.Fn zip_source_zip
creates a zip source from a file in a zip archive.
The
\fBsrcarchive\fR
argument is the (open) zip archive containing the source zip file
at index
\fBsrcidx.\fR
\fBlen\fR
bytes from offset
\fBstart\fR
will be used in the zip_source.
If
\fBlen\fR
is 0 or \-1, the rest of the file, starting from
\fBstart,\fR
is used.
If
\fBstart\fR
is zero and
\fBlen\fR
is \-1, the whole file will be copied without decompressing it.
If
\fBflags\fR
is
\fBZIP_FL_UNCHANGED,\fR
.Fn zip_source_zip
will try to get the original data without any changes that may
have been made to
\fBsrcarchive\fR
after opening it.
.SH "RETURN VALUES"
Upon successful completion, the created source is returned.
Otherwise,
\fBNULL\fR
is returned and the error code in
\fBarchive\fR
is set to indicate the error.
.SH "ERRORS"
.Fn zip_source_zip
fails if:
.RS
.TP 4
Bq Er ZIP_ER_CHANGED
Unchanged data was requested, but it is not available.
.TP 4
Bq Er ZIP_ER_INVAL
\fBsrcarchive,\fR
\fBsrcidx,\fR
\fBstart,\fR
or
\fBlen\fR
are invalid.
.TP 4
Bq Er ZIP_ER_MEMORY
Required memory could not be allocated.
.RE
Additionally, it can return all error codes from
.Fn zip_stat_index
and
.Fn zip_fopen_index.
.SH "SEE ALSO"
libzip(3),
zip_add(3),
zip_replace(3),
zip_source_buffer(3),
zip_source_file(3),
zip_source_filep(3),
zip_source_free(3),
zip_source_function(3)
.SH "AUTHORS"

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