#ifndef DATE_TIME_C_TIME_HPP___ | |
#define DATE_TIME_C_TIME_HPP___ | |
/* Copyright (c) 2002,2003,2005 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: 2010-01-10 14:17:23 -0500 (Sun, 10 Jan 2010) $ | |
*/ | |
/*! @file c_time.hpp | |
Provide workarounds related to the ctime header | |
*/ | |
#include <ctime> | |
#include <string> // to be able to convert from string literals to exceptions | |
#include <stdexcept> | |
#include <boost/throw_exception.hpp> | |
#include <boost/date_time/compiler_config.hpp> | |
//Work around libraries that don't put time_t and time in namespace std | |
#ifdef BOOST_NO_STDC_NAMESPACE | |
namespace std { using ::time_t; using ::time; using ::localtime; | |
using ::tm; using ::gmtime; } | |
#endif // BOOST_NO_STDC_NAMESPACE | |
//The following is used to support high precision time clocks | |
#ifdef BOOST_HAS_GETTIMEOFDAY | |
#include <sys/time.h> | |
#endif | |
#ifdef BOOST_HAS_FTIME | |
#include <time.h> | |
#endif | |
namespace boost { | |
namespace date_time { | |
//! Provides a uniform interface to some 'ctime' functions | |
/*! Provides a uniform interface to some ctime functions and | |
* their '_r' counterparts. The '_r' functions require a pointer to a | |
* user created std::tm struct whereas the regular functions use a | |
* staticly created struct and return a pointer to that. These wrapper | |
* functions require the user to create a std::tm struct and send in a | |
* pointer to it. This struct may be used to store the resulting time. | |
* The returned pointer may or may not point to this struct, however, | |
* it will point to the result of the corresponding function. | |
* All functions do proper checking of the C function results and throw | |
* exceptions on error. Therefore the functions will never return NULL. | |
*/ | |
struct c_time { | |
public: | |
#if defined(BOOST_DATE_TIME_HAS_REENTRANT_STD_FUNCTIONS) | |
//! requires a pointer to a user created std::tm struct | |
inline | |
static std::tm* localtime(const std::time_t* t, std::tm* result) | |
{ | |
// localtime_r() not in namespace std??? | |
result = localtime_r(t, result); | |
if (!result) | |
boost::throw_exception(std::runtime_error("could not convert calendar time to local time")); | |
return result; | |
} | |
//! requires a pointer to a user created std::tm struct | |
inline | |
static std::tm* gmtime(const std::time_t* t, std::tm* result) | |
{ | |
// gmtime_r() not in namespace std??? | |
result = gmtime_r(t, result); | |
if (!result) | |
boost::throw_exception(std::runtime_error("could not convert calendar time to UTC time")); | |
return result; | |
} | |
#else // BOOST_HAS_THREADS | |
#if (defined(_MSC_VER) && (_MSC_VER >= 1400)) | |
#pragma warning(push) // preserve warning settings | |
#pragma warning(disable : 4996) // disable depricated localtime/gmtime warning on vc8 | |
#endif // _MSC_VER >= 1400 | |
//! requires a pointer to a user created std::tm struct | |
inline | |
static std::tm* localtime(const std::time_t* t, std::tm* result) | |
{ | |
result = std::localtime(t); | |
if (!result) | |
boost::throw_exception(std::runtime_error("could not convert calendar time to local time")); | |
return result; | |
} | |
//! requires a pointer to a user created std::tm struct | |
inline | |
static std::tm* gmtime(const std::time_t* t, std::tm* result) | |
{ | |
result = std::gmtime(t); | |
if (!result) | |
boost::throw_exception(std::runtime_error("could not convert calendar time to UTC time")); | |
return result; | |
} | |
#if (defined(_MSC_VER) && (_MSC_VER >= 1400)) | |
#pragma warning(pop) // restore warnings to previous state | |
#endif // _MSC_VER >= 1400 | |
#endif // BOOST_HAS_THREADS | |
}; | |
}} // namespaces | |
#endif // DATE_TIME_C_TIME_HPP___ |