Use out-of-tree asdcplib-cth

[libdcp.git] / asdcplib / src / KM_tai.h

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-/*
-
-THIS IS A SUBSET OF THE FULL LIBTAI. CHANGES HAVE BEEN MADE TO SUIT
-LIBKUMU STYLE AND TYPE CONVENTIONS. ALL BUGS BELONG TO JOHN HURST.
-THE FOLLOWING IS FOR ATTRIBUTION, THANK YOU MR. BERNSTEIN FOR WRITING
-AND DISTRIBUTING SUCH GREAT SOFTWARE:
-
-libtai 0.60, alpha.
-19981013
-Copyright 1998
-D. J. Bernstein, djb@pobox.com
-http://pobox.com/~djb/libtai.html
-
-
-libtai is a library for storing and manipulating dates and times.
-
-libtai supports two time scales: (1) TAI64, covering a few hundred
-billion years with 1-second precision; (2) TAI64NA, covering the same
-period with 1-attosecond precision. Both scales are defined in terms of
-TAI, the current international real time standard.
-
-libtai provides an internal format for TAI64, struct tai, designed for
-fast time manipulations. The tai_pack() and tai_unpack() routines
-convert between struct tai and a portable 8-byte TAI64 storage format.
-libtai provides similar internal and external formats for TAI64NA.
-
-libtai provides struct caldate to store dates in year-month-day form. It
-can convert struct caldate, under the Gregorian calendar, to a modified
-Julian day number for easy date arithmetic.
-
-libtai provides struct caltime to store calendar dates and times along
-with UTC offsets. It can convert from struct tai to struct caltime in
-UTC, accounting for leap seconds, for accurate date and time display. It
-can also convert back from struct caltime to struct tai for user input.
-Its overall UTC-to-TAI conversion speed is 100x better than the usual
-UNIX mktime() implementation.
-
-This version of libtai requires a UNIX system with gettimeofday(). It
-will be easy to port to other operating systems with compilers
-supporting 64-bit arithmetic.
-
-The libtai source code is in the public domain.
-
-*/
-
-  /*! \file    KM_tai.h
-    \version $Id: KM_tai.h,v 1.5 2012/02/21 02:09:30 jhurst Exp $
-    \brief   portable time functions
-  */
-
-#ifndef _KUMU_TAI_H_
-#define _KUMU_TAI_H_
-
-#include <KM_platform.h>
-
-//
-namespace Kumu
-{
-  namespace TAI
-  {
-    class caltime;
-
-    //
-    struct tai
-    {
-      ui64_t x;
-      inline void add_seconds(i32_t s)  { x += s; }
-      inline void add_minutes(i32_t m) { x += m * 60; }
-      inline void add_hours(i32_t h) { x += h * 3600; }
-      inline void add_days(i32_t d) { x += d * 86400; }
-      void now();
-
-      const tai& operator=(const caltime& rhs);
-    };
-    
-    //
-    struct caldate
-    {
-      i32_t year;
-      i32_t month;
-      i32_t day;
-    };
-
-    //
-    class caltime
-    {
-    public:
-      caldate date;
-      i32_t hour;
-      i32_t minute;
-      i32_t second;
-      i32_t offset;
-
-      const caltime& operator=(const tai& rhs);
-    };
-
-
-  } // namespace TAI
-
-} // namespace Kumu
-
-
-#endif // _KUMU_TAI_H_
-
-//
-// end KM_tai.h
-//