Chris@16: #ifndef DATE_TIME_C_TIME_HPP___
Chris@16: #define DATE_TIME_C_TIME_HPP___
Chris@16: 
Chris@16: /* Copyright (c) 2002,2003,2005 CrystalClear Software, Inc.
Chris@16:  * Use, modification and distribution is subject to the
Chris@16:  * Boost Software License, Version 1.0. (See accompanying
Chris@16:  * file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
Chris@16:  * Author: Jeff Garland, Bart Garst
Chris@101:  * $Date$
Chris@16:  */
Chris@16: 
Chris@16: 
Chris@16: /*! @file c_time.hpp
Chris@16:   Provide workarounds related to the ctime header
Chris@16: */
Chris@16: 
Chris@16: #include <ctime>
Chris@16: #include <string> // to be able to convert from string literals to exceptions
Chris@16: #include <stdexcept>
Chris@16: #include <boost/throw_exception.hpp>
Chris@16: #include <boost/date_time/compiler_config.hpp>
Chris@16: 
Chris@16: //Work around libraries that don't put time_t and time in namespace std
Chris@16: #ifdef BOOST_NO_STDC_NAMESPACE
Chris@16: namespace std { using ::time_t; using ::time; using ::localtime;
Chris@16:                 using ::tm;  using ::gmtime; }
Chris@16: #endif // BOOST_NO_STDC_NAMESPACE
Chris@16: 
Chris@16: //The following is used to support high precision time clocks
Chris@16: #ifdef BOOST_HAS_GETTIMEOFDAY
Chris@16: #include <sys/time.h>
Chris@16: #endif
Chris@16: 
Chris@16: #ifdef BOOST_HAS_FTIME
Chris@16: #include <time.h>
Chris@16: #endif
Chris@16: 
Chris@16: namespace boost {
Chris@16: namespace date_time {
Chris@16:   //! Provides a uniform interface to some 'ctime' functions
Chris@16:   /*! Provides a uniform interface to some ctime functions and
Chris@16:    * their '_r' counterparts. The '_r' functions require a pointer to a
Chris@16:    * user created std::tm struct whereas the regular functions use a
Chris@16:    * staticly created struct and return a pointer to that. These wrapper
Chris@16:    * functions require the user to create a std::tm struct and send in a
Chris@16:    * pointer to it. This struct may be used to store the resulting time.
Chris@16:    * The returned pointer may or may not point to this struct, however,
Chris@16:    * it will point to the result of the corresponding function.
Chris@16:    * All functions do proper checking of the C function results and throw
Chris@16:    * exceptions on error. Therefore the functions will never return NULL.
Chris@16:    */
Chris@16:   struct c_time {
Chris@16:     public:
Chris@16: #if defined(BOOST_DATE_TIME_HAS_REENTRANT_STD_FUNCTIONS)
Chris@16:       //! requires a pointer to a user created std::tm struct
Chris@16:       inline
Chris@16:       static std::tm* localtime(const std::time_t* t, std::tm* result)
Chris@16:       {
Chris@16:         // localtime_r() not in namespace std???
Chris@16:  	#if defined(__VMS) && __INITIAL_POINTER_SIZE == 64
Chris@16:  	std::tm tmp;
Chris@16:  	if(!localtime_r(t,&tmp))
Chris@16:             result = 0;
Chris@16: 	else
Chris@16:             *result = tmp;	
Chris@16:  	#else
Chris@16:         result = localtime_r(t, result);
Chris@16: 	#endif
Chris@16:         if (!result)
Chris@16:           boost::throw_exception(std::runtime_error("could not convert calendar time to local time"));
Chris@16:         return result;
Chris@16:       }
Chris@16:       //! requires a pointer to a user created std::tm struct
Chris@16:       inline
Chris@16:       static std::tm* gmtime(const std::time_t* t, std::tm* result)
Chris@16:       {
Chris@16:         // gmtime_r() not in namespace std???
Chris@16:  	#if defined(__VMS) && __INITIAL_POINTER_SIZE == 64
Chris@16:  	std::tm tmp;
Chris@16:  	if(!gmtime_r(t,&tmp))
Chris@16:           result = 0;
Chris@16:         else
Chris@16:           *result = tmp;	
Chris@16: 	#else
Chris@16:         result = gmtime_r(t, result);
Chris@16: 	#endif
Chris@16:         if (!result)
Chris@16:           boost::throw_exception(std::runtime_error("could not convert calendar time to UTC time"));
Chris@16:         return result;
Chris@16:       }
Chris@101: #else // BOOST_DATE_TIME_HAS_REENTRANT_STD_FUNCTIONS
Chris@16: 
Chris@16: #if (defined(_MSC_VER) && (_MSC_VER >= 1400))
Chris@16: #pragma warning(push) // preserve warning settings
Chris@16: #pragma warning(disable : 4996) // disable depricated localtime/gmtime warning on vc8
Chris@16: #endif // _MSC_VER >= 1400
Chris@16:       //! requires a pointer to a user created std::tm struct
Chris@16:       inline
Chris@16:       static std::tm* localtime(const std::time_t* t, std::tm* result)
Chris@16:       {
Chris@16:         result = std::localtime(t);
Chris@16:         if (!result)
Chris@16:           boost::throw_exception(std::runtime_error("could not convert calendar time to local time"));
Chris@16:         return result;
Chris@16:       }
Chris@16:       //! requires a pointer to a user created std::tm struct
Chris@16:       inline
Chris@16:       static std::tm* gmtime(const std::time_t* t, std::tm* result)
Chris@16:       {
Chris@16:         result = std::gmtime(t);
Chris@16:         if (!result)
Chris@16:           boost::throw_exception(std::runtime_error("could not convert calendar time to UTC time"));
Chris@16:         return result;
Chris@16:       }
Chris@16: #if (defined(_MSC_VER) && (_MSC_VER >= 1400))
Chris@16: #pragma warning(pop) // restore warnings to previous state
Chris@16: #endif // _MSC_VER >= 1400
Chris@16: 
Chris@101: #endif // BOOST_DATE_TIME_HAS_REENTRANT_STD_FUNCTIONS
Chris@16:   };
Chris@16: }} // namespaces
Chris@16: 
Chris@16: #endif // DATE_TIME_C_TIME_HPP___