]>
Commit | Line | Data |
---|---|---|
bb70624e JA |
1 | /* timeval.c - functions to perform operations on struct timevals */ |
2 | ||
3 | /* Copyright (C) 1999 Free Software Foundation, Inc. | |
4 | ||
5 | This file is part of GNU Bash, the Bourne Again SHell. | |
6 | ||
3185942a JA |
7 | Bash is free software: you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation, either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | Bash is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with Bash. If not, see <http://www.gnu.org/licenses/>. | |
19 | */ | |
bb70624e JA |
20 | |
21 | #include <config.h> | |
22 | ||
23 | #if defined (HAVE_TIMEVAL) | |
24 | ||
25 | #include <sys/types.h> | |
26 | #include <posixtime.h> | |
27 | ||
28 | #include <stdio.h> | |
29 | ||
30 | struct timeval * | |
31 | difftimeval (d, t1, t2) | |
32 | struct timeval *d, *t1, *t2; | |
33 | { | |
34 | d->tv_sec = t2->tv_sec - t1->tv_sec; | |
35 | d->tv_usec = t2->tv_usec - t1->tv_usec; | |
36 | if (d->tv_usec < 0) | |
37 | { | |
38 | d->tv_usec += 1000000; | |
39 | d->tv_sec -= 1; | |
40 | if (d->tv_sec < 0) /* ??? -- BSD/OS does this */ | |
41 | { | |
42 | d->tv_sec = 0; | |
43 | d->tv_usec = 0; | |
44 | } | |
45 | } | |
46 | return d; | |
47 | } | |
48 | ||
49 | struct timeval * | |
50 | addtimeval (d, t1, t2) | |
51 | struct timeval *d, *t1, *t2; | |
52 | { | |
53 | d->tv_sec = t1->tv_sec + t2->tv_sec; | |
54 | d->tv_usec = t1->tv_usec + t2->tv_usec; | |
55 | if (d->tv_usec >= 1000000) | |
56 | { | |
57 | d->tv_usec -= 1000000; | |
58 | d->tv_sec += 1; | |
59 | } | |
60 | return d; | |
61 | } | |
62 | ||
63 | /* Do "cpu = ((user + sys) * 10000) / real;" with timevals. | |
64 | Barely-tested code from Deven T. Corzine <deven@ties.org>. */ | |
65 | int | |
66 | timeval_to_cpu (rt, ut, st) | |
67 | struct timeval *rt, *ut, *st; /* real, user, sys */ | |
68 | { | |
69 | struct timeval t1, t2; | |
70 | register int i; | |
71 | ||
72 | addtimeval (&t1, ut, st); | |
73 | t2.tv_sec = rt->tv_sec; | |
74 | t2.tv_usec = rt->tv_usec; | |
75 | ||
76 | for (i = 0; i < 6; i++) | |
77 | { | |
78 | if ((t1.tv_sec > 99999999) || (t2.tv_sec > 99999999)) | |
79 | break; | |
80 | t1.tv_sec *= 10; | |
81 | t1.tv_sec += t1.tv_usec / 100000; | |
82 | t1.tv_usec *= 10; | |
83 | t1.tv_usec %= 1000000; | |
84 | t2.tv_sec *= 10; | |
85 | t2.tv_sec += t2.tv_usec / 100000; | |
86 | t2.tv_usec *= 10; | |
87 | t2.tv_usec %= 1000000; | |
88 | } | |
89 | for (i = 0; i < 4; i++) | |
90 | { | |
91 | if (t1.tv_sec < 100000000) | |
92 | t1.tv_sec *= 10; | |
93 | else | |
94 | t2.tv_sec /= 10; | |
95 | } | |
96 | ||
97 | return ((t2.tv_sec == 0) ? 0 : t1.tv_sec / t2.tv_sec); | |
98 | } | |
99 | ||
100 | /* Convert a pointer to a struct timeval to seconds and thousandths of a | |
101 | second, returning the values in *SP and *SFP, respectively. This does | |
102 | rounding on the fractional part, not just truncation to three places. */ | |
103 | void | |
104 | timeval_to_secs (tvp, sp, sfp) | |
105 | struct timeval *tvp; | |
f73dda09 | 106 | time_t *sp; |
bb70624e JA |
107 | int *sfp; |
108 | { | |
109 | int rest; | |
110 | ||
111 | *sp = tvp->tv_sec; | |
112 | ||
113 | *sfp = tvp->tv_usec % 1000000; /* pretty much a no-op */ | |
114 | rest = *sfp % 1000; | |
115 | *sfp = (*sfp * 1000) / 1000000; | |
116 | if (rest >= 500) | |
117 | *sfp += 1; | |
118 | ||
119 | /* Sanity check */ | |
120 | if (*sfp >= 1000) | |
121 | { | |
122 | *sp += 1; | |
123 | *sfp -= 1000; | |
124 | } | |
125 | } | |
126 | ||
127 | /* Print the contents of a struct timeval * in a standard way to stdio | |
128 | stream FP. */ | |
129 | void | |
130 | print_timeval (fp, tvp) | |
131 | FILE *fp; | |
132 | struct timeval *tvp; | |
133 | { | |
f73dda09 JA |
134 | time_t timestamp; |
135 | long minutes; | |
136 | int seconds, seconds_fraction; | |
bb70624e | 137 | |
f73dda09 | 138 | timeval_to_secs (tvp, ×tamp, &seconds_fraction); |
bb70624e | 139 | |
f73dda09 JA |
140 | minutes = timestamp / 60; |
141 | seconds = timestamp % 60; | |
bb70624e | 142 | |
f73dda09 | 143 | fprintf (fp, "%ldm%d.%03ds", minutes, seconds, seconds_fraction); |
bb70624e JA |
144 | } |
145 | #endif /* HAVE_TIMEVAL */ |