1 /*
 2  *  This program is free software; you can redistribute it and/or modify
 3  *  it under the terms of the GNU General Public License as published by
 4  *  the Free Software Foundation; either version 2 of the License, or
 5  *  (at your option) any later version.
 6  *
 7  *  This program is distributed in the hope that it will be useful,
 8  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 9  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
10  *  GNU Library General Public License for more details.
11  *
12  *  You should have received a copy of the GNU General Public License
13  *  along with this program; if not, write to the Free Software
14  *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
15  *
16  * Copyright (C) 2005-2006 Ralf Huesing <ralf@stormbind.net>
17  *
18  */
19 
20 /*
21  *
22  * rh_gmtime - generate a gmt formatted time string:
23  * 
24  *      "Sat, 05 Nov 2005 17:22:26 GMT"
25  *
26  * 
27  * rh_gmtime_init() initalizes the rh_gmtime_t type and writes the
28  * time string into the internal buffer.
29  * 
30  * rh_gmtime_update() updates only nessecary sections of the
31  * time string, eg. only minutes and seconds, depending on the
32  * given time_t value. static parts of the string like " GMT"
33  * are not written. This is done once by calling rh_gmtime_init().
34  *
35  */
36 
37 #ifndef RH_GMTIME_H
38 #define RH_GMTIME_H 1
39 
40 #include <time.h>
41 
42 #define GMT_LEN (sizeof("Sat, 05 Nov 2005 17:22:26 GMT")-1)
43 
44 typedef
45 struct {
46         time_t          t;
47         struct tm       tm; 
48         char            data[GMT_LEN+1];
49         short           used;
50 } rh_gmtime_t;
51 
52 void rh_gmtime_init (rh_gmtime_t *gmt, time_t t);
53 void rh_gmtime_update (rh_gmtime_t *gmt, time_t t);
54 
55 int  rh_gmtime_reverse (const char *src, size_t nsrc, rh_gmtime_t *out);
56 
57 #define rh_gmtime_cstr(_gmt) \
58         ((const char *)(_gmt)->b)
59 
60 #endif /* ! RH_GMTIME_H */


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