/usr/include/boost/date_time/filetime_functions.hpp is in libboost1.55-dev 1.55.0+dfsg-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 | #ifndef DATE_TIME_FILETIME_FUNCTIONS_HPP__
#define DATE_TIME_FILETIME_FUNCTIONS_HPP__
/* Copyright (c) 2004 CrystalClear Software, Inc.
* Use, modification and distribution is subject to the
* Boost Software License, Version 1.0. (See accompanying
* file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
* Author: Jeff Garland, Bart Garst
* $Date: 2012-09-22 09:04:10 -0700 (Sat, 22 Sep 2012) $
*/
/*! @file filetime_functions.hpp
* Function(s) for converting between a FILETIME structure and a
* time object. This file is only available on systems that have
* BOOST_HAS_FTIME defined.
*/
#include <boost/date_time/compiler_config.hpp>
#if defined(BOOST_HAS_FTIME) // skip this file if no FILETIME
#if defined(BOOST_USE_WINDOWS_H)
# include <windows.h>
#endif
#include <boost/cstdint.hpp>
#include <boost/date_time/time.hpp>
#include <boost/date_time/date_defs.hpp>
namespace boost {
namespace date_time {
namespace winapi {
#if !defined(BOOST_USE_WINDOWS_H)
extern "C" {
struct FILETIME
{
boost::uint32_t dwLowDateTime;
boost::uint32_t dwHighDateTime;
};
struct SYSTEMTIME
{
boost::uint16_t wYear;
boost::uint16_t wMonth;
boost::uint16_t wDayOfWeek;
boost::uint16_t wDay;
boost::uint16_t wHour;
boost::uint16_t wMinute;
boost::uint16_t wSecond;
boost::uint16_t wMilliseconds;
};
__declspec(dllimport) void __stdcall GetSystemTimeAsFileTime(FILETIME* lpFileTime);
__declspec(dllimport) int __stdcall FileTimeToLocalFileTime(const FILETIME* lpFileTime, FILETIME* lpLocalFileTime);
__declspec(dllimport) void __stdcall GetSystemTime(SYSTEMTIME* lpSystemTime);
__declspec(dllimport) int __stdcall SystemTimeToFileTime(const SYSTEMTIME* lpSystemTime, FILETIME* lpFileTime);
} // extern "C"
#endif // defined(BOOST_USE_WINDOWS_H)
typedef FILETIME file_time;
typedef SYSTEMTIME system_time;
inline void get_system_time_as_file_time(file_time& ft)
{
#if BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3205))
// Some runtime library implementations expect local times as the norm for ctime.
file_time ft_utc;
GetSystemTimeAsFileTime(&ft_utc);
FileTimeToLocalFileTime(&ft_utc, &ft);
#elif defined(BOOST_HAS_GETSYSTEMTIMEASFILETIME)
GetSystemTimeAsFileTime(&ft);
#else
system_time st;
GetSystemTime(&st);
SystemTimeToFileTime(&st, &ft);
#endif
}
/*!
* The function converts file_time into number of microseconds elapsed since 1970-Jan-01
*
* \note Only dates after 1970-Jan-01 are supported. Dates before will be wrapped.
*
* \note The function is templated on the FILETIME type, so that
* it can be used with both native FILETIME and the ad-hoc
* boost::date_time::winapi::file_time type.
*/
template< typename FileTimeT >
inline boost::uint64_t file_time_to_microseconds(FileTimeT const& ft)
{
/* shift is difference between 1970-Jan-01 & 1601-Jan-01
* in 100-nanosecond intervals */
const uint64_t shift = 116444736000000000ULL; // (27111902 << 32) + 3577643008
union {
FileTimeT as_file_time;
uint64_t as_integer; // 100-nanos since 1601-Jan-01
} caster;
caster.as_file_time = ft;
caster.as_integer -= shift; // filetime is now 100-nanos since 1970-Jan-01
return (caster.as_integer / 10); // truncate to microseconds
}
} // namespace winapi
//! Create a time object from an initialized FILETIME struct.
/*!
* Create a time object from an initialized FILETIME struct.
* A FILETIME struct holds 100-nanosecond units (0.0000001). When
* built with microsecond resolution the file_time's sub second value
* will be truncated. Nanosecond resolution has no truncation.
*
* \note The function is templated on the FILETIME type, so that
* it can be used with both native FILETIME and the ad-hoc
* boost::date_time::winapi::file_time type.
*/
template< typename TimeT, typename FileTimeT >
inline
TimeT time_from_ftime(const FileTimeT& ft)
{
typedef typename TimeT::date_type date_type;
typedef typename TimeT::date_duration_type date_duration_type;
typedef typename TimeT::time_duration_type time_duration_type;
// https://svn.boost.org/trac/boost/ticket/2523
// Since this function can be called with arbitrary times, including ones that
// are before 1970-Jan-01, we'll have to cast the time a bit differently,
// than it is done in the file_time_to_microseconds function. This allows to
// avoid integer wrapping for dates before 1970-Jan-01.
union {
FileTimeT as_file_time;
uint64_t as_integer; // 100-nanos since 1601-Jan-01
} caster;
caster.as_file_time = ft;
uint64_t sec = caster.as_integer / 10000000UL;
uint32_t sub_sec = (caster.as_integer % 10000000UL) // 100-nanoseconds since the last second
#if !defined(BOOST_DATE_TIME_POSIX_TIME_STD_CONFIG)
/ 10; // microseconds since the last second
#else
* 100; // nanoseconds since the last second
#endif
// split sec into usable chunks: days, hours, minutes, & seconds
const uint32_t sec_per_day = 86400; // seconds per day
uint32_t days = static_cast< uint32_t >(sec / sec_per_day);
uint32_t tmp = static_cast< uint32_t >(sec % sec_per_day);
uint32_t hours = tmp / 3600; // sec_per_hour
tmp %= 3600;
uint32_t minutes = tmp / 60; // sec_per_min
tmp %= 60;
uint32_t seconds = tmp; // seconds
date_duration_type dd(days);
date_type d = date_type(1601, Jan, 01) + dd;
return TimeT(d, time_duration_type(hours, minutes, seconds, sub_sec));
}
}} // boost::date_time
#endif // BOOST_HAS_FTIME
#endif // DATE_TIME_FILETIME_FUNCTIONS_HPP__
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