[44] | 1 | #ifndef DATE_TIME_C_TIME_HPP___ |
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| 2 | #define DATE_TIME_C_TIME_HPP___ |
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| 3 | |
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| 4 | /* Copyright (c) 2002,2003,2005 CrystalClear Software, Inc. |
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| 5 | * Use, modification and distribution is subject to the |
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| 6 | * Boost Software License, Version 1.0. (See accompanying |
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| 7 | * file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt) |
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| 8 | * Author: Jeff Garland, Bart Garst |
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| 9 | * $Date: 2010-01-10 14:17:23 -0500 (Sun, 10 Jan 2010) $ |
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| 10 | */ |
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| 11 | |
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| 12 | |
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| 13 | /*! @file c_time.hpp |
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| 14 | Provide workarounds related to the ctime header |
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| 15 | */ |
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| 16 | |
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| 17 | #include <ctime> |
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| 18 | #include <string> // to be able to convert from string literals to exceptions |
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| 19 | #include <stdexcept> |
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| 20 | #include <boost/throw_exception.hpp> |
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| 21 | #include <boost/date_time/compiler_config.hpp> |
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| 22 | |
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| 23 | //Work around libraries that don't put time_t and time in namespace std |
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| 24 | #ifdef BOOST_NO_STDC_NAMESPACE |
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| 25 | namespace std { using ::time_t; using ::time; using ::localtime; |
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| 26 | using ::tm; using ::gmtime; } |
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| 27 | #endif // BOOST_NO_STDC_NAMESPACE |
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| 28 | |
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| 29 | //The following is used to support high precision time clocks |
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| 30 | #ifdef BOOST_HAS_GETTIMEOFDAY |
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| 31 | #include <sys/time.h> |
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| 32 | #endif |
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| 33 | |
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| 34 | #ifdef BOOST_HAS_FTIME |
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| 35 | #include <time.h> |
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| 36 | #endif |
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| 37 | |
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| 38 | namespace boost { |
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| 39 | namespace date_time { |
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| 40 | //! Provides a uniform interface to some 'ctime' functions |
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| 41 | /*! Provides a uniform interface to some ctime functions and |
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| 42 | * their '_r' counterparts. The '_r' functions require a pointer to a |
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| 43 | * user created std::tm struct whereas the regular functions use a |
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| 44 | * staticly created struct and return a pointer to that. These wrapper |
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| 45 | * functions require the user to create a std::tm struct and send in a |
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| 46 | * pointer to it. This struct may be used to store the resulting time. |
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| 47 | * The returned pointer may or may not point to this struct, however, |
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| 48 | * it will point to the result of the corresponding function. |
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| 49 | * All functions do proper checking of the C function results and throw |
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| 50 | * exceptions on error. Therefore the functions will never return NULL. |
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| 51 | */ |
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| 52 | struct c_time { |
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| 53 | public: |
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| 54 | #if defined(BOOST_DATE_TIME_HAS_REENTRANT_STD_FUNCTIONS) |
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| 55 | //! requires a pointer to a user created std::tm struct |
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| 56 | inline |
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| 57 | static std::tm* localtime(const std::time_t* t, std::tm* result) |
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| 58 | { |
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| 59 | // localtime_r() not in namespace std??? |
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| 60 | result = localtime_r(t, result); |
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| 61 | if (!result) |
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| 62 | boost::throw_exception(std::runtime_error("could not convert calendar time to local time")); |
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| 63 | return result; |
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| 64 | } |
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| 65 | //! requires a pointer to a user created std::tm struct |
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| 66 | inline |
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| 67 | static std::tm* gmtime(const std::time_t* t, std::tm* result) |
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| 68 | { |
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| 69 | // gmtime_r() not in namespace std??? |
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| 70 | result = gmtime_r(t, result); |
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| 71 | if (!result) |
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| 72 | boost::throw_exception(std::runtime_error("could not convert calendar time to UTC time")); |
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| 73 | return result; |
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| 74 | } |
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| 75 | #else // BOOST_HAS_THREADS |
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| 76 | |
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| 77 | #if (defined(_MSC_VER) && (_MSC_VER >= 1400)) |
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| 78 | #pragma warning(push) // preserve warning settings |
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| 79 | #pragma warning(disable : 4996) // disable depricated localtime/gmtime warning on vc8 |
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| 80 | #endif // _MSC_VER >= 1400 |
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| 81 | //! requires a pointer to a user created std::tm struct |
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| 82 | inline |
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| 83 | static std::tm* localtime(const std::time_t* t, std::tm* result) |
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| 84 | { |
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| 85 | result = std::localtime(t); |
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| 86 | if (!result) |
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| 87 | boost::throw_exception(std::runtime_error("could not convert calendar time to local time")); |
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| 88 | return result; |
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| 89 | } |
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| 90 | //! requires a pointer to a user created std::tm struct |
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| 91 | inline |
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| 92 | static std::tm* gmtime(const std::time_t* t, std::tm* result) |
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| 93 | { |
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| 94 | result = std::gmtime(t); |
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| 95 | if (!result) |
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| 96 | boost::throw_exception(std::runtime_error("could not convert calendar time to UTC time")); |
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| 97 | return result; |
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| 98 | } |
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| 99 | #if (defined(_MSC_VER) && (_MSC_VER >= 1400)) |
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| 100 | #pragma warning(pop) // restore warnings to previous state |
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| 101 | #endif // _MSC_VER >= 1400 |
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| 102 | |
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| 103 | #endif // BOOST_HAS_THREADS |
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| 104 | }; |
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| 105 | }} // namespaces |
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| 106 | |
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| 107 | #endif // DATE_TIME_C_TIME_HPP___ |
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