.\" zip_source_seek.mdoc -- set read offset in source
.\" Copyright (C) 2014-2017 Dieter Baron and Thomas Klausner
.\"
.\" This file is part of libzip, a library to manipulate ZIP archives.
.\" The authors can be contacted at <libzip@nih.at>
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.Dd December 18, 2017
.Dt ZIP_SOURCE_SEEK 3
.Os
.Sh NAME
.Nm zip_source_seek
.Nd set read offset in zip source
.Sh LIBRARY
libzip (-lzip)
.Sh SYNOPSIS
.In zip.h
.Ft int
.Fn zip_source_seek "zip_source_t *source" "zip_int64_t offset" "int whence"
.Sh DESCRIPTION
The function
.Fn zip_source_seek
sets the current read offset for
.Fa source .
Just like in
.Xr fseek 3 ,
depending on the
.Ar whence
argument, the
.Ar offset
is counted relative from:
.Bl -tag -width SEEK_CURXX -offset indent
.It Dv SEEK_SET
start of file
.It Dv SEEK_CUR
current read offset in file
.It Dv SEEK_END
end of file
.El
.Sh RETURN VALUES
Upon successful completion 0 is returned.
Otherwise, \-1 is returned and the error information in
.Ar source
is set to indicate the error.
.Sh SEE ALSO
.Xr libzip 3 ,
.Xr zip_source 3 ,
.Xr zip_source_read 3 ,
.Xr zip_source_tell 3
.Sh HISTORY
.Fn zip_source_seek
was added in libzip 1.0.
.Sh AUTHORS
.An -nosplit
.An Dieter Baron Aq Mt dillo@nih.at
and
.An Thomas Klausner Aq Mt tk@giga.or.at