2 * $Id: gp_time.h,v 1.6.4.1 2008/09/02 21:12:59 sfeam Exp $
5 /* GNUPLOT - gp_time.h */
8 * Copyright 1999, 2004 Thomas Williams, Colin Kelley
10 * Permission to use, copy, and distribute this software and its
11 * documentation for any purpose with or without fee is hereby granted,
12 * provided that the above copyright notice appear in all copies and
13 * that both that copyright notice and this permission notice appear
14 * in supporting documentation.
16 * Permission to modify the software is granted, but not the right to
17 * distribute the complete modified source code. Modifications are to
18 * be distributed as patches to the released version. Permission to
19 * distribute binaries produced by compiling modified sources is granted,
21 * 1. distribute the corresponding source modifications from the
22 * released version in the form of a patch file along with the binaries,
23 * 2. add special version identification to distinguish your version
24 * in addition to the base release version number,
25 * 3. provide your name and address as the primary contact for the
26 * support of your modified version, and
27 * 4. retain our contact information in regard to use of the base
29 * Permission to distribute the released version of the source code along
30 * with corresponding source modifications in the form of a patch file is
31 * granted with same provisions 2 through 4 for binary distributions.
33 * This software is provided "as is" without express or implied warranty
34 * to the extent permitted by applicable law.
37 #ifndef GNUPLOT_GP_TIME_H
38 # define GNUPLOT_GP_TIME_H
40 /* #if... / #include / #define collection: */
45 /* defines used for timeseries, seconds */
46 #define ZERO_YEAR 2000
47 #define JAN_FIRST_WDAY 6 /* 1st jan, 2000 is a Saturday (cal 1 2000 on unix) */
48 #define SEC_OFFS_SYS 946684800.0 /* zero gnuplot (2000) - zero system (1970) */
49 #define YEAR_SEC 31557600.0 /* avg, incl. leap year */
50 #define MON_SEC 2629800.0 /* YEAR_SEC / 12 */
51 #define WEEK_SEC 604800.0
52 #define DAY_SEC 86400.0
54 /* Type definitions */
56 /* Variables of time.c needed by other modules: */
58 /* Prototypes of functions exported by time.c */
61 char * gstrptime __PROTO((char *, char *, struct tm *));
63 /* seconds to string */
64 size_t gstrftime __PROTO((char *, size_t, const char *, double));
67 double gtimegm __PROTO((struct tm *));
70 int ggmtime __PROTO((struct tm *, double));
74 #endif /* GNUPLOT_GP_TIME_H */