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Comment:time_io-rfc_3339: add extra arguments to work around implementations without leap second support
Timelines: family | ancestors | descendants | both | trunk
Files: files | file ages | folders
SHA1: 21534f262f497758fa31d0c337963132147f9814
User & Date: nat on 2014-08-20 19:49:24
Other Links: manifest | tags
Context
2014-08-21
20:52
time_io-tests: add test for leap second workaround on implementations that don't support them check-in: ba34be19be user: nat tags: trunk
2014-08-20
19:49
time_io-rfc_3339: add extra arguments to work around implementations without leap second support check-in: 21534f262f user: nat tags: trunk
2014-08-19
21:09
time_io-tests: check leap second support before using it in tests check-in: 03c5f8582b user: nat tags: trunk
Changes
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Modified src/natools-time_io-rfc_3339.adb from [254f3dab5b] to [aba9d550db].

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   --------------------
   -- Time To String --
   --------------------

   function Image
     (Date : Ada.Calendar.Time;
      Subsecond_Digits : Natural := 0)
      Subsecond_Digits : Natural := 0;
      Force_Leap_Second : Boolean := False)
     return String is
   begin
      return Image
        (Date,
         Ada.Calendar.Time_Zones.UTC_Time_Offset (Date),
         Subsecond_Digits);
         Subsecond_Digits,
         Force_Leap_Second);
   end Image;


   function Image
     (Date : Ada.Calendar.Time;
      Time_Zone : Ada.Calendar.Time_Zones.Time_Offset;
      Subsecond_Digits : Natural := 0)
      Subsecond_Digits : Natural := 0;
      Force_Leap_Second : Boolean := False)
     return String
   is
      function Subsecond_Image
        (Subsecond : Ada.Calendar.Formatting.Second_Duration)
        return String;

      function Time_Zone_Image return String;
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        (Date,
         Year, Month, Day,
         Hour, Minute, Second,
         Subsecond,
         Leap_Second,
         Time_Zone);

      if Leap_Second then
      if Leap_Second or Force_Leap_Second then
         pragma Assert (Second = 59);
         Used_Second := 60;
      else
         Used_Second := Second;
      end if;

      return
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   procedure Value
     (Image : in String;
      Date : out Ada.Calendar.Time;
      Time_Zone : out Ada.Calendar.Time_Zones.Time_Offset)
   is
      Discarded : Boolean;
   begin
      Value (Image, Date, Time_Zone, Discarded);
   end Value;


   procedure Value
     (Image : in String;
      Date : out Ada.Calendar.Time;
      Time_Zone : out Ada.Calendar.Time_Zones.Time_Offset;
      Leap_Second : out Boolean)
   is
      Year : Ada.Calendar.Year_Number;
      Month : Ada.Calendar.Month_Number;
      Day : Ada.Calendar.Day_Number;
      Hour : Ada.Calendar.Formatting.Hour_Number;
      Minute : Ada.Calendar.Formatting.Minute_Number;
      Second : Ada.Calendar.Formatting.Second_Number;
      Subsecond : Ada.Calendar.Formatting.Second_Duration := 0.0;
      Leap_Second : Boolean;
   begin
      Year := Natural'Value (Image (Image'First .. Image'First + 3));
      Month := Natural'Value (Image (Image'First + 5 .. Image'First + 6));
      Day := Natural'Value (Image (Image'First + 8 .. Image'First + 9));
      Hour := Natural'Value (Image (Image'First + 11 .. Image'First + 12));
      Minute := Natural'Value
        (Image (Image'First + 14 .. Image'First + 15));

      declare
         Number : constant Natural
           := Natural'Value (Image (Image'First + 17 .. Image'First + 18));
      begin
         if Number = 60 then
            Leap_Second := True;
            Second := 59;
         else
            Leap_Second := False;
            Second := Number;
         end if;
      end;

      if Image (Image'First + 19) = Subsecond_Separator then
         declare
            I : Positive := Image'First + 20;
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            when '+' =>
               null;
            when others =>
               raise Constraint_Error
                 with "Invalid time zone separator in RFC 3339 date";
         end case;
      end if;

      if Leap_Second then
         begin
            Date := Ada.Calendar.Formatting.Time_Of
              (Year, Month, Day,
               Hour, Minute, Second,
               Subsecond, True, Time_Zone);
            return;
         exception
            when Ada.Calendar.Time_Error =>
               null;
         end;
      end if;

      Date := Ada.Calendar.Formatting.Time_Of
        (Year, Month, Day,
         Hour, Minute, Second,
         Subsecond, Leap_Second, Time_Zone);
         Subsecond, False, Time_Zone);
   end Value;

end Natools.Time_IO.RFC_3339;

Modified src/natools-time_io-rfc_3339.ads from [25471d80ad] to [d3cf5765f6].

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   Subsecond_Separator : constant Character := '.';

   function Is_Valid (Image : String) return Boolean;
      --  Check whether Image is a valid RFC-3339 date

   function Image
     (Date : Ada.Calendar.Time;
      Subsecond_Digits : Natural := 0)
      Subsecond_Digits : Natural := 0;
      Force_Leap_Second : Boolean := False)
     return String
     with Post => Is_Valid (Image'Result);
      --  Return the RFC-3339 representation of Date in current time zone

   function Image
     (Date : Ada.Calendar.Time;
      Time_Zone : Ada.Calendar.Time_Zones.Time_Offset;
      Subsecond_Digits : Natural := 0)
      Subsecond_Digits : Natural := 0;
      Force_Leap_Second : Boolean := False)
     return String
     with Post => Is_Valid (Image'Result);
      --  Return the RFC-3339 representation of Date in Time_Zone

   function Value (Image : String) return Ada.Calendar.Time
     with Pre => Is_Valid (Image) or else raise Constraint_Error;
      --  Return the time associated with the given RFC-3339 representation

   procedure Value
     (Image : in String;
      Date : out Ada.Calendar.Time;
      Time_Zone : out Ada.Calendar.Time_Zones.Time_Offset)
     with Pre => Is_Valid (Image) or else raise Constraint_Error;
      --  Return the time associated with the given RFC-3339 representation

   procedure Value
     (Image : in String;
      Date : out Ada.Calendar.Time;
      Time_Zone : out Ada.Calendar.Time_Zones.Time_Offset;
      Leap_Second : out Boolean)
     with Pre => Is_Valid (Image) or else raise Constraint_Error;
      --  Return the time associated with the given RFC-3339 representation

end Natools.Time_IO.RFC_3339;

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