time.cc revision 2632:1bb2f91485ea 
1/*
2 * Copyright (c) 2003-2005 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include <sys/types.h>
30#include <sys/time.h>
31#include <time.h>
32#include <iostream>
33#include <string>
34
35#include "base/time.hh"
36
37using namespace std;
38
39struct _timeval
40{
41    timeval tv;
42};
43
44double
45convert(const timeval &tv)
46{
47    return (double)tv.tv_sec + (double)tv.tv_usec / 1000000.0;
48}
49
50Time::Time(bool set_now)
51{
52    time = new _timeval;
53    if (set_now)
54        set();
55}
56
57Time::Time(const timeval &val)
58{
59    time = new _timeval;
60    set(val);
61}
62
63Time::Time(const Time &val)
64{
65    time = new _timeval;
66    set(val.get());
67}
68
69Time::~Time()
70{
71    delete time;
72}
73
74const timeval &
75Time::get() const
76{
77    return time->tv;
78}
79
80void
81Time::set()
82{
83    ::gettimeofday(&time->tv, NULL);
84}
85
86void
87Time::set(const timeval &tv)
88{
89    memcpy(&time->tv, &tv, sizeof(timeval));
90}
91
92double
93Time::operator()() const
94{
95    return convert(get());
96}
97
98string
99Time::date(string format) const
100{
101    const timeval &tv = get();
102    time_t sec = tv.tv_sec;
103    char buf[256];
104
105    if (format.empty()) {
106        ctime_r(&sec, buf);
107        buf[24] = '\0';
108        return buf;
109    }
110
111    struct tm *tm = localtime(&sec);
112    strftime(buf, sizeof(buf), format.c_str(), tm);
113    return buf;
114}
115
116ostream &
117operator<<(ostream &out, const Time &start)
118{
119    out << start.date();
120    return out;
121}
122
123Time
124operator-(const Time &l, const Time &r)
125{
126    timeval tv;
127    timersub(&l.get(), &r.get(), &tv);
128    return tv;
129}
130
131const Time Time::start(true);
132