| 1 | #ifndef _GREGORIAN__CONVERSION_HPP___ |
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| 2 | #define _GREGORIAN__CONVERSION_HPP___ |
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| 3 | |
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| 4 | /* Copyright (c) 2004-2005 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 or http://www.boost.org/LICENSE-1.0) |
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| 8 | * Author: Jeff Garland, Bart Garst |
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| 9 | * $Date: 2005/10/28 13:32:38 $ |
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| 10 | */ |
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| 11 | |
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| 12 | #include <exception> |
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| 13 | #include "boost/date_time/gregorian/gregorian_types.hpp" |
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| 14 | #include "boost/date_time/c_time.hpp" |
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| 15 | #if defined(USE_DATE_TIME_PRE_1_33_FACET_IO) |
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| 16 | # if defined(BOOST_DATE_TIME_INCLUDE_LIMITED_HEADERS) |
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| 17 | # include "boost/date_time/gregorian/formatters_limited.hpp" |
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| 18 | # else |
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| 19 | # include "boost/date_time/gregorian/formatters.hpp" |
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| 20 | # endif // BOOST_DATE_TIME_INCLUDE_LIMITED_HEADERS |
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| 21 | #else |
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| 22 | # include <sstream> |
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| 23 | # include "boost/date_time/gregorian/gregorian_io.hpp" |
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| 24 | #endif // USE_DATE_TIME_PRE_1_33_FACET_IO |
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| 25 | |
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| 26 | namespace boost { |
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| 27 | |
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| 28 | namespace gregorian { |
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| 29 | |
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| 30 | |
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| 31 | //! Converts a date to a tm struct. Throws out_of_range exception if date is a special value |
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| 32 | inline |
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| 33 | std::tm to_tm(const date& d) |
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| 34 | { |
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| 35 | if(d.is_pos_infinity() || d.is_neg_infinity() || d.is_not_a_date()){ |
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| 36 | #if defined(USE_DATE_TIME_PRE_1_33_FACET_IO) |
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| 37 | std::string s("tm unable to handle date value of " + to_simple_string(d)); |
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| 38 | throw std::out_of_range(s); |
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| 39 | #else |
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| 40 | std::stringstream ss; |
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| 41 | ss << "tm unable to handle date value of " << d; |
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| 42 | throw std::out_of_range(ss.str()); |
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| 43 | #endif // USE_DATE_TIME_PRE_1_33_FACET_IO |
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| 44 | } |
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| 45 | std::tm datetm; |
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| 46 | boost::gregorian::date::ymd_type ymd = d.year_month_day(); |
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| 47 | datetm.tm_year = ymd.year-1900; |
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| 48 | datetm.tm_mon = ymd.month-1; |
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| 49 | datetm.tm_mday = ymd.day; |
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| 50 | datetm.tm_wday = d.day_of_week(); |
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| 51 | datetm.tm_yday = d.day_of_year()-1; |
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| 52 | datetm.tm_hour = datetm.tm_min = datetm.tm_sec = 0; |
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| 53 | datetm.tm_isdst = -1; // negative because not enough info to set tm_isdst |
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| 54 | return datetm; |
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| 55 | } |
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| 56 | |
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| 57 | //! Converts a tm structure into a date dropping the any time values. |
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| 58 | inline |
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| 59 | date date_from_tm(const std::tm& datetm) |
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| 60 | { |
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| 61 | return date(static_cast<unsigned short>(datetm.tm_year+1900), |
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| 62 | static_cast<unsigned short>(datetm.tm_mon+1), |
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| 63 | static_cast<unsigned short>(datetm.tm_mday)); |
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| 64 | } |
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| 65 | |
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| 66 | |
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| 67 | } } //namespace boost::gregorian |
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| 68 | |
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| 69 | |
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| 70 | |
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| 71 | |
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| 72 | #endif |
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| 73 | |
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