.\"
.\" libdivecomputer
.\"
.\" Copyright (C) 2017 Kristaps Dzonsons <kristaps@bsd.lv>
.\"
.\" This library is free software; you can redistribute it and/or
.\" modify it under the terms of the GNU Lesser General Public
.\" License as published by the Free Software Foundation; either
.\" version 2.1 of the License, or (at your option) any later version.
.\"
.\" This library is distributed in the hope that it will be useful,
.\" but WITHOUT ANY WARRANTY; without even the implied warranty of
.\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
.\" Lesser General Public License for more details.
.\"
.\" You should have received a copy of the GNU Lesser General Public
.\" License along with this library; if not, write to the Free Software
.\" Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
.\" MA 02110-1301 USA
.\"
.Dd January 11, 2017
.Dt DC_DATETIME_MKTIME 3
.Os
.Sh NAME
.Nm dc_datetime_mktime
.Nd convert an local date and time to a timestamp
.Sh LIBRARY
.Lb libdivecomputer
.Sh SYNOPSIS
.In libdivecomputer/datetime.h
.Ft dc_ticks_t
.Fo dc_datetime_mktime
.Fa "const dc_datetime_t *dt"
.Fc
.Sh DESCRIPTION
Convert a broken-down local date and time created with
.Xr dc_datetime_localtime 3
into an integral timestamp.
.Pp
The
.Nm
function may internally invoke libc's
.Xr mktime 3 .
.Sh RETURN VALUES
This returns the integral time-stamp or -1 if the given date and time
may not sanely be converted.
.Sh SEE ALSO
.Xr dc_datetime_gmtime 3 ,
.Xr dc_datetime_localtime 3 ,
.Xr dc_datetime_now 3
.Sh AUTHORS
The
.Lb libdivecomputer
library was written by
.An Jef Driesen ,
.Mt jef@libdivecomputer.org .
The manpages were written by
.An Kristaps Dzonsons ,
.Mt kristaps@bsd.lv .