Mercurial > hg > CbC > CbC_gcc
comparison gcc/ada/libgnat/a-calcon.ads @ 111:04ced10e8804
gcc 7
| author | kono |
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| date | Fri, 27 Oct 2017 22:46:09 +0900 |
| parents | |
| children | 84e7813d76e9 |
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| 68:561a7518be6b | 111:04ced10e8804 |
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| 1 ------------------------------------------------------------------------------ | |
| 2 -- -- | |
| 3 -- GNAT RUN-TIME COMPONENTS -- | |
| 4 -- -- | |
| 5 -- A D A . C A L E N D A R . C O N V E R S I O N S -- | |
| 6 -- -- | |
| 7 -- S p e c -- | |
| 8 -- -- | |
| 9 -- Copyright (C) 2008-2017, Free Software Foundation, Inc. -- | |
| 10 -- -- | |
| 11 -- GNAT is free software; you can redistribute it and/or modify it under -- | |
| 12 -- terms of the GNU General Public License as published by the Free Soft- -- | |
| 13 -- ware Foundation; either version 3, or (at your option) any later ver- -- | |
| 14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- | |
| 15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- | |
| 16 -- or FITNESS FOR A PARTICULAR PURPOSE. -- | |
| 17 -- -- | |
| 18 -- As a special exception under Section 7 of GPL version 3, you are granted -- | |
| 19 -- additional permissions described in the GCC Runtime Library Exception, -- | |
| 20 -- version 3.1, as published by the Free Software Foundation. -- | |
| 21 -- -- | |
| 22 -- You should have received a copy of the GNU General Public License and -- | |
| 23 -- a copy of the GCC Runtime Library Exception along with this program; -- | |
| 24 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- | |
| 25 -- <http://www.gnu.org/licenses/>. -- | |
| 26 -- -- | |
| 27 -- GNAT was originally developed by the GNAT team at New York University. -- | |
| 28 -- Extensive contributions were provided by Ada Core Technologies Inc. -- | |
| 29 -- -- | |
| 30 ------------------------------------------------------------------------------ | |
| 31 | |
| 32 -- This package provides various routines for conversion between Ada and Unix | |
| 33 -- time models - Time, Duration, struct tm and struct timespec. | |
| 34 | |
| 35 with Interfaces.C; | |
| 36 | |
| 37 package Ada.Calendar.Conversions is | |
| 38 | |
| 39 function To_Ada_Time (Unix_Time : Interfaces.C.long) return Time; | |
| 40 -- Convert a time value represented as number of seconds since the | |
| 41 -- Unix Epoch to a time value relative to an Ada implementation-defined | |
| 42 -- Epoch. The units of the result are nanoseconds on all targets. Raises | |
| 43 -- Time_Error if the result cannot fit into a Time value. | |
| 44 | |
| 45 function To_Ada_Time | |
| 46 (tm_year : Interfaces.C.int; | |
| 47 tm_mon : Interfaces.C.int; | |
| 48 tm_day : Interfaces.C.int; | |
| 49 tm_hour : Interfaces.C.int; | |
| 50 tm_min : Interfaces.C.int; | |
| 51 tm_sec : Interfaces.C.int; | |
| 52 tm_isdst : Interfaces.C.int) return Time; | |
| 53 -- Convert a time value expressed in Unix-like fields of struct tm into | |
| 54 -- a Time value relative to the Ada Epoch. The ranges of the formals are | |
| 55 -- as follows: | |
| 56 | |
| 57 -- tm_year -- years since 1900 | |
| 58 -- tm_mon -- months since January [0 .. 11] | |
| 59 -- tm_day -- day of the month [1 .. 31] | |
| 60 -- tm_hour -- hours since midnight [0 .. 24] | |
| 61 -- tm_min -- minutes after the hour [0 .. 59] | |
| 62 -- tm_sec -- seconds after the minute [0 .. 60] | |
| 63 -- tm_isdst -- Daylight Savings Time flag [-1 .. 1] | |
| 64 | |
| 65 -- The returned value is in UTC and may or may not contain leap seconds | |
| 66 -- depending on whether binder flag "-y" was used. Raises Time_Error if | |
| 67 -- the input values are out of the defined ranges or if tm_sec equals 60 | |
| 68 -- and the instance in time is not a leap second occurrence. | |
| 69 | |
| 70 function To_Duration | |
| 71 (tv_sec : Interfaces.C.long; | |
| 72 tv_nsec : Interfaces.C.long) return Duration; | |
| 73 -- Convert an elapsed time value expressed in Unix-like fields of struct | |
| 74 -- timespec into a Duration value. The expected ranges are: | |
| 75 | |
| 76 -- tv_sec - seconds | |
| 77 -- tv_nsec - nanoseconds | |
| 78 | |
| 79 procedure To_Struct_Timespec | |
| 80 (D : Duration; | |
| 81 tv_sec : out Interfaces.C.long; | |
| 82 tv_nsec : out Interfaces.C.long); | |
| 83 -- Convert a Duration value into the constituents of struct timespec. | |
| 84 -- Formal tv_sec denotes seconds and tv_nsecs denotes nanoseconds. | |
| 85 | |
| 86 procedure To_Struct_Tm | |
| 87 (T : Time; | |
| 88 tm_year : out Interfaces.C.int; | |
| 89 tm_mon : out Interfaces.C.int; | |
| 90 tm_day : out Interfaces.C.int; | |
| 91 tm_hour : out Interfaces.C.int; | |
| 92 tm_min : out Interfaces.C.int; | |
| 93 tm_sec : out Interfaces.C.int); | |
| 94 -- Convert a Time value set in the Ada Epoch into the constituents of | |
| 95 -- struct tm. The ranges of the out formals are as follows: | |
| 96 | |
| 97 -- tm_year -- years since 1900 | |
| 98 -- tm_mon -- months since January [0 .. 11] | |
| 99 -- tm_day -- day of the month [1 .. 31] | |
| 100 -- tm_hour -- hours since midnight [0 .. 24] | |
| 101 -- tm_min -- minutes after the hour [0 .. 59] | |
| 102 -- tm_sec -- seconds after the minute [0 .. 60] | |
| 103 -- tm_isdst -- Daylight Savings Time flag [-1 .. 1] | |
| 104 | |
| 105 -- The input date is considered to be in UTC | |
| 106 | |
| 107 function To_Unix_Time (Ada_Time : Time) return Interfaces.C.long; | |
| 108 -- Convert a time value represented as number of time units since the Ada | |
| 109 -- implementation-defined Epoch to a value relative to the Unix Epoch. The | |
| 110 -- units of the result are seconds. Raises Time_Error if the result cannot | |
| 111 -- fit into a Time value. | |
| 112 | |
| 113 end Ada.Calendar.Conversions; |