2 * Definition of data structure to hold time values with nanosecond resolution
4 * Wireshark - Network traffic analyzer
5 * By Gerald Combs <gerald@wireshark.org>
6 * Copyright 1998 Gerald Combs
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * as published by the Free Software Foundation; either version 2
11 * of the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
28 #include "ws_symbol_export.h"
32 #endif /* __cplusplus */
35 * Definition of data structure to hold time values with nanosecond resolution
38 /** data structure to hold time values with nanosecond resolution*/
46 /** set the given nstime_t to zero */
47 WS_DLL_PUBLIC void nstime_set_zero(nstime_t *nstime);
49 /** is the given nstime_t currently zero? */
50 WS_DLL_PUBLIC gboolean nstime_is_zero(nstime_t *nstime);
52 /** set the given nstime_t to (0,maxint) to mark it as "unset"
53 * That way we can find the first frame even when a timestamp
54 * is zero (fix for bug 1056)
56 WS_DLL_PUBLIC void nstime_set_unset(nstime_t *nstime);
58 /* is the given nstime_t currently (0,maxint)? */
59 WS_DLL_PUBLIC gboolean nstime_is_unset(nstime_t *nstime);
61 /** duplicate the current time
65 WS_DLL_PUBLIC void nstime_copy(nstime_t *a, const nstime_t *b);
67 /** calculate the delta between two times (can be negative!)
71 * Note that it is acceptable for two or more of the arguments to point at the
74 WS_DLL_PUBLIC void nstime_delta(nstime_t *delta, const nstime_t *b, const nstime_t *a );
76 /** calculate the sum of two times
80 * Note that it is acceptable for two or more of the arguments to point at the
83 WS_DLL_PUBLIC void nstime_sum(nstime_t *sum, const nstime_t *b, const nstime_t *a );
86 #define nstime_add(sum, a) nstime_sum(sum, sum, a)
89 #define nstime_subtract(sum, a) nstime_delta(sum, sum, a)
91 /** compare two times are return a value similar to memcmp() or strcmp().
97 WS_DLL_PUBLIC int nstime_cmp (const nstime_t *a, const nstime_t *b );
99 /** converts nstime to double, time base is milli seconds */
100 WS_DLL_PUBLIC double nstime_to_msec(const nstime_t *nstime);
102 /** converts nstime to double, time base is seconds */
103 WS_DLL_PUBLIC double nstime_to_sec(const nstime_t *nstime);
107 #endif /* __cplusplus */
109 #endif /* __NSTIME_H__ */