diff options
Diffstat (limited to 'src/utility')
| -rw-r--r-- | src/utility/datetimeUtils.cpp | 221 | ||||
| -rw-r--r-- | src/utility/stringUtils.cpp | 5 |
2 files changed, 224 insertions, 2 deletions
diff --git a/src/utility/datetimeUtils.cpp b/src/utility/datetimeUtils.cpp new file mode 100644 index 00000000..2c9d6d08 --- /dev/null +++ b/src/utility/datetimeUtils.cpp @@ -0,0 +1,221 @@ +// +// VMime library (http://vmime.sourceforge.net) +// Copyright (C) 2002-2004 Vincent Richard <[email protected]> +// +// This program is free software; you can redistribute it and/or +// modify it under the terms of the GNU General Public License as +// published by the Free Software Foundation; either version 2 of +// the License, or (at your option) any later version. +// +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program; if not, write to the Free Software +// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +// + +#include "vmime/utility/datetimeUtils.hpp" + + +namespace vmime { +namespace utility { + + +#ifndef VMIME_BUILDING_DOC + +static inline void nextMonth(datetime& d) +{ + if (d.getMonth() >= 12) + { + d.setMonth(1); + d.setYear(d.getYear() + 1); + } + else + { + d.setMonth(d.getMonth() + 1); + } +} + + +static inline void prevMonth(datetime& d) +{ + if (d.getMonth() <= 1) + { + d.setYear(d.getYear() - 1); + d.setMonth(12); + } + else + { + d.setMonth(d.getMonth() - 1); + } +} + + +static inline void nextDay(datetime& d) +{ + + if (d.getDay() >= datetimeUtils::getDaysInMonth(d.getYear(), d.getMonth())) + { + d.setDay(1); + nextMonth(d); + } + else + { + d.setDay(d.getDay() + 1); + } +} + + +static inline void prevDay(datetime& d) +{ + if (d.getDay() <= 1) + { + prevMonth(d); + d.setDay(datetimeUtils::getDaysInMonth(d.getYear(), d.getMonth())); + } + else + { + d.setDay(d.getDay() - 1); + } +} + + +static inline void nextHour(datetime& d) +{ + if (d.getHour() >= 23) + { + d.setHour(0); + nextDay(d); + } + else + { + d.setHour(d.getHour() + 1); + } +} + + +static inline void prevHour(datetime& d) +{ + if (d.getHour() <= 0) + { + d.setHour(23); + prevDay(d); + } + else + { + d.setHour(d.getHour() - 1); + } +} + + +static inline void addHoursAndMinutes(datetime& d, const int h, const int m) +{ + d.setMinute(d.getMinute() + m); + + if (d.getMinute() >= 60) + { + d.setMinute(d.getMinute() - 60); + nextHour(d); + } + + d.setHour(d.getHour() + h); + + if (d.getHour() >= 24) + { + d.setHour(d.getHour() - 24); + nextDay(d); + } +} + + +static inline void substractHoursAndMinutes(datetime& d, const int h, const int m) +{ + if (m > d.getMinute()) + { + d.setMinute(60 - (m - d.getMinute())); + prevHour(d); + } + else + { + d.setMinute(d.getMinute() - m); + } + + if (h > d.getHour()) + { + d.setHour(24 - (h - d.getHour())); + prevDay(d); + } + else + { + d.setHour(d.getHour() - h); + } +} + +#endif // VMIME_BUILDING_DOC + + +const datetime datetimeUtils::localTimeToUniversalTime(const datetime& date) +{ + if (date.getZone() == datetime::GMT) + return (date); + + datetime nd(date); + nd.setZone(datetime::GMT); + + const int z = date.getZone(); + const int h = (z < 0) ? (-z / 60) : (z / 60); + const int m = (z < 0) ? (-z - h * 60) : (z - h * 60); + + if (z < 0) // GMT-hhmm: add hours and minutes to date + addHoursAndMinutes(nd, h, m); + else // GMT+hhmm: substract hours and minutes from date + substractHoursAndMinutes(nd, h, m); + + return (nd); +} + + +const datetime datetimeUtils::universalTimeToLocalTime(const datetime& date, const int zone) +{ + if (zone == 0) + return (date); + + datetime nd(date); + nd.setZone(zone); + + const int z = zone; + const int h = (z < 0) ? (-z / 60) : (z / 60); + const int m = (z < 0) ? (-z - h * 60) : (z - h * 60); + + if (z < 0) // GMT+hhmm: substract hours and minutes from date + substractHoursAndMinutes(nd, h, m); + else // GMT-hhmm: add hours and minutes to date + addHoursAndMinutes(nd, h, m); + + return (nd); +} + + +const bool datetimeUtils::isLeapYear(const int year) +{ + // From RFC 3339 - Appendix C. Leap Years: + return ((year % 4) == 0 && (year % 100 != 0 || year % 400 == 0)); +} + + +const int datetimeUtils::getDaysInMonth(const int year, const int month) +{ + static const int daysInMonth[12] = + { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }; + static const int daysInMonthLeapYear[12] = + { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }; + + return (isLeapYear(year) ? daysInMonthLeapYear[month - 1] : daysInMonth[month - 1]); +} + + +} // utility +} // vmime diff --git a/src/utility/stringUtils.cpp b/src/utility/stringUtils.cpp index eeb6f5a6..c087e032 100644 --- a/src/utility/stringUtils.cpp +++ b/src/utility/stringUtils.cpp @@ -20,8 +20,8 @@ #include "vmime/utility/stringUtils.hpp" -namespace vmime -{ +namespace vmime { +namespace utility { const bool stringUtils::isStringEqualNoCase @@ -119,4 +119,5 @@ const string::size_type stringUtils::countASCIIchars } +} // utility } // vmime |