2 * tod.c -- time of day pseudo-class implementation
4 * Copyright (c) 1995 John H. Poplett
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice immediately at the beginning of the file, without modification,
12 * this list of conditions, and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Absolutely no warranty of function or purpose is made by the author
18 * 4. This work was done expressly for inclusion into FreeBSD. Other use
19 * is allowed if this notation is included.
20 * 5. Modifications may be freely made to this file if the above conditions
25 #include <sys/types.h>
35 int tod_cmp (const struct timeval
*a
, const struct timeval
*b
)
38 assert (a
->tv_usec
<= USP
);
39 assert (b
->tv_usec
<= USP
);
40 rc
= a
->tv_sec
- b
->tv_sec
;
42 rc
= a
->tv_usec
- b
->tv_usec
;
49 int tod_lt (const struct timeval
*a
, const struct timeval
*b
)
51 return tod_cmp (a
, b
) < 0;
54 int tod_gt (const struct timeval
*a
, const struct timeval
*b
)
56 return tod_cmp (a
, b
) > 0;
59 int tod_lte (const struct timeval
*a
, const struct timeval
*b
)
61 return tod_cmp (a
, b
) <= 0;
64 int tod_gte (const struct timeval
*a
, const struct timeval
*b
)
66 return tod_cmp (a
, b
) >= 0;
69 int tod_eq (const struct timeval
*a
, const struct timeval
*b
)
71 return tod_cmp (a
, b
) == 0;
77 void tod_addto (struct timeval
*a
, const struct timeval
*b
)
79 a
->tv_usec
+= b
->tv_usec
;
80 a
->tv_sec
+= b
->tv_sec
+ a
->tv_usec
/ USP
;
87 void tod_subfrom (struct timeval
*a
, struct timeval b
)
89 assert (a
->tv_usec
<= USP
);
90 assert (b
.tv_usec
<= USP
);
91 if (b
.tv_usec
> a
->tv_usec
)
96 a
->tv_usec
-= b
.tv_usec
;
97 a
->tv_sec
-= b
.tv_sec
;
100 void tod_gettime (struct timeval
*tp
)
102 gettimeofday (tp
, NULL
);
103 tp
->tv_sec
+= tp
->tv_usec
/ USP
;