// bbldc_basicdaycountutil.h -*-C++-*- #ifndef INCLUDED_BBLDC_BASICDAYCOUNTUTIL #define INCLUDED_BBLDC_BASICDAYCOUNTUTIL #include <bsls_ident.h> BSLS_IDENT("$Id: $") //@PURPOSE: Support for day-count calculations of 'enum'-specified conventions. // //@CLASSES: // bbldc::BasicDayCountUtil: 'enum'-specified day-count calculation procedures // //@SEE_ALSO: bbldc_daycountconvention // //@DESCRIPTION: This component provides a 'struct', 'bbldc::BasicDayCountUtil', // that defines a suite of date-related functions used to compute the day count // and the year fraction between two dates as prescribed by an enumerated // day-count convention. Specifically, the 'daysDiff' and 'yearsDiff' methods // defined in 'bbldc::BasicDayCountUtil' take a trailing // 'DayCountConvention::Enum' argument indicating which particular day-count // convention to apply. // ///Usage ///----- // This section illustrates intended use of this component. // ///Example 1: Computing Day Count and Year Fraction /// - - - - - - - - - - - - - - - - - - - - - - - - // The following snippets of code illustrate how to use // 'bbldc::BasicDayCountUtil' methods. First, create two 'bdlt::Date' // variables, 'd1' and 'd2': //.. // const bdlt::Date d1(2003, 10, 19); // const bdlt::Date d2(2003, 12, 31); //.. // Now, compute the day count between 'd1' and 'd2' according to the ISDA // Actual/Actual convention: //.. // const int daysDiff = bbldc::BasicDayCountUtil::daysDiff( // d1, // d2, // bbldc::DayCountConvention::e_ISDA_ACTUAL_ACTUAL); // assert(73 == daysDiff); //.. // Finally, compute the year fraction between the two dates according to the // ISDA Actual/Actual convention: //.. // const double yearsDiff = bbldc::BasicDayCountUtil::yearsDiff( // d1, // d2, // bbldc::DayCountConvention::e_ISDA_ACTUAL_ACTUAL); // // Need fuzzy comparison since 'yearsDiff' is a 'double'. // assert(0.1999 < yearsDiff && 0.2001 > yearsDiff); //.. #include <bblscm_version.h> #include <bbldc_daycountconvention.h> #include <bdlt_date.h> namespace BloombergLP { namespace bbldc { // ======================== // struct BasicDayCountUtil // ======================== struct BasicDayCountUtil { // This 'struct' provides a namespace for a suite of pure functions that // compute values based on dates according to enumerated day-count // conventions. // CLASS METHODS static int daysDiff(const bdlt::Date& beginDate, const bdlt::Date& endDate, DayCountConvention::Enum convention); // Return the (signed) number of days between the specified 'beginDate' // and 'endDate' according to the specified day-count 'convention'. // The behavior is undefined unless 'isSupported(convention)'. If // 'beginDate <= endDate' then the result is non-negative. Note that // reversing the order of 'beginDate' and 'endDate' negates the result. static bool isSupported(DayCountConvention::Enum convention); // Return 'true' if the specified 'convention' is valid for use in // 'daysDiff' and 'yearsDiff', and 'false' otherwise. static double yearsDiff(const bdlt::Date& beginDate, const bdlt::Date& endDate, DayCountConvention::Enum convention); // Return the (signed fractional) number of years between the specified // 'beginDate' and 'endDate' according to the specified day-count // 'convention'. If 'beginDate <= endDate' then the result is // non-negative. The behavior is undefined unless // 'isSupported(convention)'. Note that reversing the order of // 'beginDate' and 'endDate' negates the result; specifically, // '|yearsDiff(b, e, c) + yearsDiff(e, b, c)| <= 1.0e-15' for all dates // 'b' and 'e', and day-count conventions 'c'. }; } // close package namespace } // close enterprise namespace #endif // ---------------------------------------------------------------------------- // Copyright 2015 Bloomberg Finance L.P. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. // ----------------------------- END-OF-FILE ----------------------------------