.\" zip_fseek.mdoc -- seek in file
.\" Copyright (C) 2016-2017 Dieter Baron and Thomas Klausner
.\"
.\" This file is part of libzip, a library to manipulate ZIP archives.
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.Dd October 15, 2021
.Dt ZIP_FSEEK 3
.Os
.Sh NAME
.Nm zip_fseek ,
.Nm zip_file_is_seekable
.Nd seek in file
.Sh LIBRARY
libzip (-lzip)
.Sh SYNOPSIS
.In zip.h
.Ft zip_int8_t
.Fn zip_fseek "zip_file_t *file" "zip_int64_t offset" "int whence"
.Ft int
.Fn zip_file_is_seekable "zip_file_t *file"
.Sh DESCRIPTION
The
.Fn zip_fseek
function seeks to the specified
.Ar offset
relative to
.Ar whence ,
just like
.Xr fseek 3 .
.Pp
.Nm
only works on uncompressed (stored) data.
When called on compressed data it will return an error.
.Pp
The
.Fn zip_file_is_seekable
function returns 1 if a file is seekable.
.Sh RETURN VALUES
If successful,
.Fn zip_fseek
returns 0.
Otherwise, \-1 is returned.
.Pp
.Fn zip_file_is_seekable
returns 1 if a file is seekable and 0 if not.
On an invalid argument, it returns \-1.
.Sh SEE ALSO
.Xr libzip 3 ,
.Xr zip_fclose 3 ,
.Xr zip_fopen 3 ,
.Xr zip_fread 3 ,
.Xr zip_ftell 3
.Sh HISTORY
.Fn zip_fseek
was added in libzip 1.2.0.
.Fn zip_file_is_seekable
was added in libzip 1.9.0.
.Sh AUTHORS
.An -nosplit
.An Dieter Baron Aq Mt dillo@nih.at
and
.An Thomas Klausner Aq Mt tk@giga.or.at