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123 lines
4.2 KiB
123 lines
4.2 KiB
#ifndef DATE_TIME_C_TIME_HPP___ |
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#define DATE_TIME_C_TIME_HPP___ |
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/* Copyright (c) 2002,2003,2005 CrystalClear Software, Inc. |
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* Use, modification and distribution is subject to the |
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* Boost Software License, Version 1.0. (See accompanying |
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* file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt) |
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* Author: Jeff Garland, Bart Garst |
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* $Date: 2011-11-13 01:10:55 -0500 (Sun, 13 Nov 2011) $ |
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*/ |
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/*! @file c_time.hpp |
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Provide workarounds related to the ctime header |
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*/ |
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#include <ctime> |
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#include <string> // to be able to convert from string literals to exceptions |
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#include <stdexcept> |
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#include <boost/throw_exception.hpp> |
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#include <boost/date_time/compiler_config.hpp> |
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//Work around libraries that don't put time_t and time in namespace std |
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#ifdef BOOST_NO_STDC_NAMESPACE |
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namespace std { using ::time_t; using ::time; using ::localtime; |
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using ::tm; using ::gmtime; } |
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#endif // BOOST_NO_STDC_NAMESPACE |
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//The following is used to support high precision time clocks |
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#ifdef BOOST_HAS_GETTIMEOFDAY |
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#include <sys/time.h> |
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#endif |
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#ifdef BOOST_HAS_FTIME |
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#include <time.h> |
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#endif |
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namespace boost { |
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namespace date_time { |
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//! Provides a uniform interface to some 'ctime' functions |
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/*! Provides a uniform interface to some ctime functions and |
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* their '_r' counterparts. The '_r' functions require a pointer to a |
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* user created std::tm struct whereas the regular functions use a |
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* staticly created struct and return a pointer to that. These wrapper |
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* functions require the user to create a std::tm struct and send in a |
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* pointer to it. This struct may be used to store the resulting time. |
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* The returned pointer may or may not point to this struct, however, |
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* it will point to the result of the corresponding function. |
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* All functions do proper checking of the C function results and throw |
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* exceptions on error. Therefore the functions will never return NULL. |
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*/ |
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struct c_time { |
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public: |
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#if defined(BOOST_DATE_TIME_HAS_REENTRANT_STD_FUNCTIONS) |
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//! requires a pointer to a user created std::tm struct |
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inline |
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static std::tm* localtime(const std::time_t* t, std::tm* result) |
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{ |
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// localtime_r() not in namespace std??? |
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#if defined(__VMS) && __INITIAL_POINTER_SIZE == 64 |
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std::tm tmp; |
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if(!localtime_r(t,&tmp)) |
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result = 0; |
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else |
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*result = tmp; |
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#else |
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result = localtime_r(t, result); |
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#endif |
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if (!result) |
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boost::throw_exception(std::runtime_error("could not convert calendar time to local time")); |
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return result; |
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} |
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//! requires a pointer to a user created std::tm struct |
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inline |
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static std::tm* gmtime(const std::time_t* t, std::tm* result) |
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{ |
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// gmtime_r() not in namespace std??? |
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#if defined(__VMS) && __INITIAL_POINTER_SIZE == 64 |
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std::tm tmp; |
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if(!gmtime_r(t,&tmp)) |
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result = 0; |
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else |
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*result = tmp; |
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#else |
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result = gmtime_r(t, result); |
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#endif |
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if (!result) |
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boost::throw_exception(std::runtime_error("could not convert calendar time to UTC time")); |
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return result; |
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} |
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#else // BOOST_HAS_THREADS |
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#if (defined(_MSC_VER) && (_MSC_VER >= 1400)) |
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#pragma warning(push) // preserve warning settings |
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#pragma warning(disable : 4996) // disable depricated localtime/gmtime warning on vc8 |
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#endif // _MSC_VER >= 1400 |
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//! requires a pointer to a user created std::tm struct |
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inline |
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static std::tm* localtime(const std::time_t* t, std::tm* result) |
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{ |
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result = std::localtime(t); |
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if (!result) |
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boost::throw_exception(std::runtime_error("could not convert calendar time to local time")); |
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return result; |
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} |
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//! requires a pointer to a user created std::tm struct |
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inline |
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static std::tm* gmtime(const std::time_t* t, std::tm* result) |
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{ |
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result = std::gmtime(t); |
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if (!result) |
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boost::throw_exception(std::runtime_error("could not convert calendar time to UTC time")); |
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return result; |
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} |
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#if (defined(_MSC_VER) && (_MSC_VER >= 1400)) |
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#pragma warning(pop) // restore warnings to previous state |
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#endif // _MSC_VER >= 1400 |
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#endif // BOOST_HAS_THREADS |
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}; |
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}} // namespaces |
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#endif // DATE_TIME_C_TIME_HPP___
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