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.\" Author: Archie Cobbs <archie@freebsd.org>
.\"
.\" $Id: structs_type_time.3,v 1.1.1.1 2012/02/21 23:25:53 misho Exp $
.\"
.Dd April 22, 2002
.Dt STRUCTS_TYPE_TIME 3
.Os
.Sh NAME
.Nm structs_type_time
.Nd structs types for time values
.Sh LIBRARY
PDEL Library (libpdel, \-lpdel)
.Sh SYNOPSIS
.In sys/types.h
.In pdel/structs/structs.h
.In pdel/structs/type/time.h
.Vt extern const struct structs_type structs_type_time_gmt ;
.Vt extern const struct structs_type structs_type_time_local ;
.Vt extern const struct structs_type structs_type_time_iso8601 ;
.Vt extern const struct structs_type structs_type_time_abs ;
.Vt extern const struct structs_type structs_type_time_rel ;
.Sh DESCRIPTION
The
.Xr structs 3
library includes several pre-defined types for time values.
All of the types below describe a variable of type
.Li "time_t" ,
which holds the number of seconds since Jan 1, 1970 00:00:00 GMT.
.Pp
The only difference between the types below is how the ASCII
form of a time value is represented.
.Pp
.Bl -hang -offset 3n
.It Em structs_type_time_gmt
Displays the time in
.Xr ctime 3
GMT format, e.g., "Mon Apr 22 19:50:00 GMT 2002".
.It Em structs_type_time_local
Displays the time in
.Xr ctime 3
local timezone format, but without the timezone explicitly shown,
e.g., "Mon Apr 22 12:50:00 2002".
.Em "Warning" :
This type should be avoided except where it is known that both
the encoding and decoding time zones are the same.
.It Em structs_type_time_iso8601
Displays the time in ISO-8601 format, e.g., "20020422T19:50:00".
.It Em structs_type_time_abs
Displays the time in seconds since Jan 1, 1970 GMT, e.g., "1019505000".
.It Em structs_type_time_rel
Displays the time in seconds relative to now, e.g., "10413".
.Em "Warning" :
The longer the time between ASCII encoding and decoding, the more
erroneous the value becomes.
.El
.Pp
.Sh SEE ALSO
.Xr libpdel 3 ,
.Xr structs 3 ,
.Xr structs_type 3
.Sh HISTORY
The PDEL library was developed at Packet Design, LLC.
.Dv "http://www.packetdesign.com/"
.Sh AUTHORS
.An Archie Cobbs Aq archie@freebsd.org