-- --
-- B o d y --
-- --
--- Copyright (C) 1999-2003 Ada Core Technologies, Inc. --
--- --
--- This specification is derived from the Ada Reference Manual for use with --
--- GNAT. The copyright notice above, and the license provisions that follow --
--- apply solely to the contents of the part following the private keyword. --
+-- Copyright (C) 1999-2006, 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- --
type Padding_Mode is (None, Zero, Space);
+ type Sec_Number is mod 2 ** 64;
+ -- Type used to compute the number of seconds since 01/01/1970. A 32 bit
+ -- number will cover only a period of 136 years. This means that for date
+ -- past 2106 the computation is not possible. A 64 bits number should be
+ -- enough for a very large period of time.
+
-----------------------
-- Local Subprograms --
-----------------------
function Am_Pm (H : Natural) return String;
- -- return AM or PM depending on the hour H
+ -- Return AM or PM depending on the hour H
function Hour_12 (H : Natural) return Positive;
- -- Convert a 1-24h format to a 0-12 hour format.
+ -- Convert a 1-24h format to a 0-12 hour format
function Image (Str : String; Length : Natural := 0) return String;
-- Return Str capitalized and cut to length number of characters. If
- -- length is set to 0 it does not cut it.
+ -- length is 0, then no cut operation is performed.
function Image
- (N : Long_Integer;
+ (N : Sec_Number;
Padding : Padding_Mode := Zero;
- Length : Natural := 0)
- return String;
- -- Return image of N. This number is eventually padded with zeros or
- -- spaces depending of the length required. If length is 0 then no padding
- -- occurs.
+ Length : Natural := 0) return String;
+ -- Return image of N. This number is eventually padded with zeros or spaces
+ -- depending of the length required. If length is 0 then no padding occurs.
function Image
- (N : Integer;
+ (N : Natural;
Padding : Padding_Mode := Zero;
- Length : Natural := 0)
- return String;
- -- As above with N provided in Integer format.
+ Length : Natural := 0) return String;
+ -- As above with N provided in Integer format
-----------
-- Am_Pm --
function Image
(Str : String;
- Length : Natural := 0)
- return String
+ Length : Natural := 0) return String
is
use Ada.Characters.Handling;
Local : constant String :=
- To_Upper (Str (1)) & To_Lower (Str (2 .. Str'Last));
-
+ To_Upper (Str (Str'First)) &
+ To_Lower (Str (Str'First + 1 .. Str'Last));
begin
if Length = 0 then
return Local;
-----------
function Image
- (N : Integer;
+ (N : Natural;
Padding : Padding_Mode := Zero;
- Length : Natural := 0)
- return String
+ Length : Natural := 0) return String
is
begin
- return Image (Long_Integer (N), Padding, Length);
+ return Image (Sec_Number (N), Padding, Length);
end Image;
function Image
- (N : Long_Integer;
+ (N : Sec_Number;
Padding : Padding_Mode := Zero;
- Length : Natural := 0)
- return String
+ Length : Natural := 0) return String
is
function Pad_Char return String;
end case;
end Pad_Char;
- NI : constant String := Long_Integer'Image (N);
+ NI : constant String := Sec_Number'Image (N);
NIP : constant String := Pad_Char & NI (2 .. NI'Last);
-- Start of processing for Image
begin
if Length = 0 or else Padding = None then
return NI (2 .. NI'Last);
-
else
return NIP (NIP'Last - Length + 1 .. NIP'Last);
end if;
function Image
(Date : Ada.Calendar.Time;
- Picture : Picture_String)
- return String
+ Picture : Picture_String) return String
is
- Padding : Padding_Mode := Zero;
+ Padding : Padding_Mode := Zero;
-- Padding is set for one directive
- Result : Unbounded_String;
+ Result : Unbounded_String;
Year : Year_Number;
Month : Month_Number;
-- A directive has the following format "%[-_]."
if Picture (P) = '%' then
-
Padding := Zero;
if P = Picture'Last then
Image (Second, Padding, Length => 2) & ' ' &
Am_Pm (Hour);
- -- Seconds since 1970-01-01 00:00:00 UTC
+ -- Seconds since 1970-01-01 00:00:00 UTC
-- (a nonstandard extension)
when 's' =>
declare
- Sec : constant Long_Integer :=
- Long_Integer
- ((Julian_Day (Year, Month, Day) -
- Julian_Day (1970, 1, 1)) * 86_400 +
- Hour * 3_600 + Minute * 60 + Second);
+ Sec : constant Sec_Number :=
+ Sec_Number (Julian_Day (Year, Month, Day)
+ - Julian_Day (1970, 1, 1)) * 86_400
+ + Sec_Number (Hour) * 3_600
+ + Sec_Number (Minute) * 60
+ + Sec_Number (Second);
begin
Result := Result & Image (Sec, None);
when 'T' =>
Result := Result &
- Image (Hour, Padding, Length => 2) & ':' &
+ Image (Hour, Padding, Length => 2) & ':' &
Image (Minute, Padding, Length => 2) & ':' &
Image (Second, Padding, Length => 2);
Image (Month_Name'Image (Month_Name'Val (Month - 1)), 3);
-- Locale's full month name, variable length
- -- (January..December)
+ -- (January..December).
when 'B' =>
Result := Result &
return To_String (Result);
end Image;
+ -----------
+ -- Value --
+ -----------
+
+ function Value (Date : String) return Ada.Calendar.Time is
+ D : String (1 .. 19);
+ D_Length : constant Natural := Date'Length;
+
+ Year : Year_Number;
+ Month : Month_Number;
+ Day : Day_Number;
+ Hour : Hour_Number;
+ Minute : Minute_Number;
+ Second : Second_Number;
+ Sub_Second : Second_Duration;
+
+ procedure Extract_Date
+ (Year : out Year_Number;
+ Month : out Month_Number;
+ Day : out Day_Number;
+ Y2K : Boolean := False);
+ -- Try and extract a date value from string D. Set Y2K to True to
+ -- account for the 20YY case. Raise Constraint_Error if the portion
+ -- of D corresponding to the date is not well formatted.
+
+ procedure Extract_Time
+ (Index : Positive;
+ Hour : out Hour_Number;
+ Minute : out Minute_Number;
+ Second : out Second_Number;
+ Check_Space : Boolean := False);
+ -- Try and extract a time value from string D starting from position
+ -- Index. Set Check_Space to True to check whether the character at
+ -- Index - 1 is a space. Raise Constraint_Error if the portion of D
+ -- corresponding to the date is not well formatted.
+
+ ------------------
+ -- Extract_Date --
+ ------------------
+
+ procedure Extract_Date
+ (Year : out Year_Number;
+ Month : out Month_Number;
+ Day : out Day_Number;
+ Y2K : Boolean := False)
+ is
+ Delim_Index : Positive := 5;
+
+ begin
+ if Y2K then
+ Delim_Index := 3;
+ end if;
+
+ if (D (Delim_Index) /= '-' or else D (Delim_Index + 3) /= '-')
+ and then
+ (D (Delim_Index) /= '/' or else D (Delim_Index + 3) /= '/')
+ then
+ raise Constraint_Error;
+ end if;
+
+ if Y2K then
+ Year := Year_Number'Value ("20" & D (1 .. 2));
+ Month := Month_Number'Value (D (4 .. 5));
+ Day := Day_Number'Value (D (7 .. 8));
+ else
+ Year := Year_Number'Value (D (1 .. 4));
+ Month := Month_Number'Value (D (6 .. 7));
+ Day := Day_Number'Value (D (9 .. 10));
+ end if;
+ end Extract_Date;
+
+ ------------------
+ -- Extract_Time --
+ ------------------
+
+ procedure Extract_Time
+ (Index : Positive;
+ Hour : out Hour_Number;
+ Minute : out Minute_Number;
+ Second : out Second_Number;
+ Check_Space : Boolean := False) is
+
+ begin
+ if Check_Space and then D (Index - 1) /= ' ' then
+ raise Constraint_Error;
+ end if;
+
+ if D (Index + 2) /= ':' or else D (Index + 5) /= ':' then
+ raise Constraint_Error;
+ end if;
+
+ Hour := Hour_Number'Value (D (Index .. Index + 1));
+ Minute := Minute_Number'Value (D (Index + 3 .. Index + 4));
+ Second := Second_Number'Value (D (Index + 6 .. Index + 7));
+ end Extract_Time;
+
+ -- Start of processing for Value
+
+ begin
+ Split (Clock, Year, Month, Day, Hour, Minute, Second, Sub_Second);
+ Sub_Second := 0.0;
+
+ -- Length checks
+
+ if D_Length /= 8
+ and then D_Length /= 10
+ and then D_Length /= 17
+ and then D_Length /= 19
+ then
+ raise Constraint_Error;
+ end if;
+
+ -- After the correct length has been determined, it is safe to create
+ -- a local string copy in order to avoid String'First N arithmetic.
+
+ D (1 .. D_Length) := Date;
+
+ -- Case 1:
+
+ -- hh:mm:ss
+ -- yy*mm*dd
+
+ if D_Length = 8 then
+
+ if D (3) = ':' then
+ Extract_Time (1, Hour, Minute, Second);
+ else
+ Extract_Date (Year, Month, Day, True);
+ Hour := 0;
+ Minute := 0;
+ Second := 0;
+ end if;
+
+ -- Case 2:
+
+ -- yyyy*mm*dd
+
+ elsif D_Length = 10 then
+ Extract_Date (Year, Month, Day);
+ Hour := 0;
+ Minute := 0;
+ Second := 0;
+
+ -- Case 3:
+
+ -- yy*mm*dd hh:mm:ss
+
+ elsif D_Length = 17 then
+ Extract_Date (Year, Month, Day, True);
+ Extract_Time (10, Hour, Minute, Second, True);
+
+ -- Case 4:
+
+ -- yyyy*mm*dd hh:mm:ss
+
+ else
+ Extract_Date (Year, Month, Day);
+ Extract_Time (12, Hour, Minute, Second, True);
+ end if;
+
+ -- Sanity checks
+
+ if not Year'Valid
+ or else not Month'Valid
+ or else not Day'Valid
+ or else not Hour'Valid
+ or else not Minute'Valid
+ or else not Second'Valid
+ then
+ raise Constraint_Error;
+ end if;
+
+ return Time_Of (Year, Month, Day, Hour, Minute, Second, Sub_Second);
+ end Value;
+
--------------
-- Put_Time --
--------------
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