.\" Automatically generated from an mdoc input file.  Do not edit.
.\" zip_source_file.mdoc -- create data source from a file
.\" Copyright (C) 2004-2021 Dieter Baron and Thomas Klausner
.\"
.\" This file is part of libzip, a library to manipulate ZIP archives.
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.TH "ZIP_SOURCE_FILE" "3" "December 18, 2017" "NiH" "Library Functions Manual"
.nh
.if n .ad l
.SH "NAME"
\fBzip_source_file\fR,
\fBzip_source_file_create\fR
\- create data source from a file
.SH "LIBRARY"
libzip (-lzip)
.SH "SYNOPSIS"
\fB#include <zip.h>\fR
.sp
\fIzip_source_t *\fR
.br
.PD 0
.HP 4n
\fBzip_source_file\fR(\fIzip_t\ *archive\fR, \fIconst\ char\ *fname\fR, \fIzip_uint64_t\ start\fR, \fIzip_int64_t\ len\fR);
.PD
.PP
\fIzip_source_t *\fR
.br
.PD 0
.HP 4n
\fBzip_source_file_create\fR(\fIconst\ char\ *fname\fR, \fIzip_uint64_t\ start\fR, \fIzip_int64_t\ len\fR, \fIzip_error_t\ *error\fR);
.PD
.SH "DESCRIPTION"
The functions
\fBzip_source_file\fR()
and
\fBzip_source_file_create\fR()
create a zip source from a file.
They open
\fIfname\fR
and read
\fIlen\fR
bytes from offset
\fIstart\fR
from it.
If
\fIlen\fR
is 0 or \-1, the whole file (starting from
\fIstart\fR)
is used.
.PP
If the file supports seek, the source can be used to open a zip archive from.
.PP
The file is opened and read when the data from the source is used, usually by
\fBzip_close\fR()
or
\fBzip_open_from_source\fR().
.SH "RETURN VALUES"
Upon successful completion, the created source is returned.
Otherwise,
\fRNULL\fR
is returned and the error code in
\fIarchive\fR
or
\fIerror\fR
is set to indicate the error.
.SH "ERRORS"
\fBzip_source_file\fR()
and
\fBzip_source_file_create\fR()
fail if:
.TP 19n
[\fRZIP_ER_INVAL\fR]
\fIfname\fR,
\fIstart\fR,
or
\fIlen\fR
are invalid.
.TP 19n
[\fRZIP_ER_MEMORY\fR]
Required memory could not be allocated.
.TP 19n
[\fRZIP_ER_OPEN\fR]
Opening
\fIfname\fR
failed.
.SH "SEE ALSO"
libzip(3),
zip_file_add(3),
zip_file_replace(3),
zip_source(3)
.SH "HISTORY"
\fBzip_source_file\fR()
and
\fBzip_source_file_create\fR()
were added in libzip 1.0.
.SH "AUTHORS"
Dieter Baron <\fIdillo@nih.at\fR>
and
Thomas Klausner <\fItk@giga.or.at\fR>