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------------------------------------------------------------------------------ -- -- -- GNAT RUN-TIME COMPONENTS -- -- -- -- G N A T . C A L E N D A R . T I M E _ I O -- -- -- -- S p e c -- -- -- -- Copyright (C) 1999-2008, AdaCore -- -- -- -- GNAT is free software; you can redistribute it and/or modify it under -- -- terms of the GNU General Public License as published by the Free Soft- -- -- ware Foundation; either version 2, or (at your option) any later ver- -- -- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- -- OUT 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 distributed with GNAT; see file COPYING. If not, write -- -- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, -- -- Boston, MA 02110-1301, USA. -- -- -- -- As a special exception, if other files instantiate generics from this -- -- unit, or you link this unit with other files to produce an executable, -- -- this unit does not by itself cause the resulting executable to be -- -- covered by the GNU General Public License. This exception does not -- -- however invalidate any other reasons why the executable file might be -- -- covered by the GNU Public License. -- -- -- -- GNAT was originally developed by the GNAT team at New York University. -- -- Extensive contributions were provided by Ada Core Technologies Inc. -- -- -- ------------------------------------------------------------------------------ -- This package augments standard Ada.Text_IO with facilities for input -- and output of time values in standardized format. package GNAT.Calendar.Time_IO is Picture_Error : exception; -- Exception raised for incorrect picture type Picture_String is new String; -- This is a string to describe date and time output format. The string is -- a set of standard character and special tag that are replaced by the -- corresponding values. It follows the GNU Date specification. Here are -- the recognized directives : -- -- % a literal % -- n a newline -- t a horizontal tab -- -- Time fields: -- -- %H hour (00..23) -- %I hour (01..12) -- %k hour ( 0..23) -- %l hour ( 1..12) -- %M minute (00..59) -- %p locale's AM or PM -- %r time, 12-hour (hh:mm:ss [AP]M) -- %s seconds since 1970-01-01 00:00:00 UTC -- (a nonstandard extension) -- %S second (00..59) -- %T time, 24-hour (hh:mm:ss) -- -- Date fields: -- -- %a locale's abbreviated weekday name (Sun..Sat) -- %A locale's full weekday name, variable length -- (Sunday..Saturday) -- %b locale's abbreviated month name (Jan..Dec) -- %B locale's full month name, variable length -- (January..December) -- %c locale's date and time (Sat Nov 04 12:02:33 EST 1989) -- %d day of month (01..31) -- %D date (mm/dd/yy) -- %h same as %b -- %j day of year (001..366) -- %m month (01..12) -- %U week number of year with Sunday as first day of week -- (00..53) -- %w day of week (0..6) with 0 corresponding to Sunday -- %W week number of year with Monday as first day of week -- (00..53) -- %x locale's date representation (mm/dd/yy) -- %y last two digits of year (00..99) -- %Y year (1970...) -- -- By default, date pads numeric fields with zeroes. GNU date -- recognizes the following nonstandard numeric modifiers: -- -- - (hyphen) do not pad the field -- _ (underscore) pad the field with spaces -- -- Here are some GNAT extensions to the GNU Date specification: -- -- %i milliseconds (3 digits) -- %e microseconds (6 digits) -- %o nanoseconds (9 digits) ISO_Date : constant Picture_String; -- This format follow the ISO 8601 standard. The format is "YYYY-MM-DD", -- four digits year, month and day number separated by minus. US_Date : constant Picture_String; -- This format is the common US date format: "MM/DD/YY", -- month and day number, two digits year separated by slashes. European_Date : constant Picture_String; -- This format is the common European date format: "DD/MM/YY", -- day and month number, two digits year separated by slashes. function Image (Date : Ada.Calendar.Time; Picture : Picture_String) return String; -- Return Date as a string with format Picture. Raise Picture_Error if -- picture string is null or has an incorrect format. function Value (Date : String) return Ada.Calendar.Time; -- Parse the string Date and return its equivalent as a Time value. The -- following time format is supported: -- -- hh:mm:ss - Date is the current date -- -- The following formats are also supported. They all accept an optional -- time with the format "hh:mm:ss". The time is separated from the date by -- exactly one space character. -- -- When the time is not specified, it is set to 00:00:00. The delimiter '*' -- must be either '-' and '/' and both occurrences must use the same -- character. -- -- Trailing characters (in particular spaces) are not allowed -- -- yyyy*mm*dd - ISO format -- yy*mm*dd - Year is assumed to be 20yy -- mm*dd*yyyy - (US date format) -- dd*mmm*yyyy - month spelled out -- yyyy*mmm*dd - month spelled out -- yyyymmdd - Iso format, no separator -- mmm dd, yyyy - month spelled out -- dd mmm yyyy - month spelled out -- -- Constraint_Error is raised if the input string is malformed (does not -- conform to one of the above dates, or has an invalid time string), or -- the resulting time is not valid. procedure Put_Time (Date : Ada.Calendar.Time; Picture : Picture_String); -- Put Date with format Picture. Raise Picture_Error if bad picture string private ISO_Date : constant Picture_String := "%Y-%m-%d"; US_Date : constant Picture_String := "%m/%d/%y"; European_Date : constant Picture_String := "%d/%m/%y"; end GNAT.Calendar.Time_IO;
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