diff options
Diffstat (limited to 'gcc/ada/libgnat/a-calfor.adb')
| -rw-r--r-- | gcc/ada/libgnat/a-calfor.adb | 882 |
1 files changed, 882 insertions, 0 deletions
diff --git a/gcc/ada/libgnat/a-calfor.adb b/gcc/ada/libgnat/a-calfor.adb new file mode 100644 index 00000000000..c10e790fb9c --- /dev/null +++ b/gcc/ada/libgnat/a-calfor.adb @@ -0,0 +1,882 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT RUN-TIME COMPONENTS -- +-- -- +-- A D A . C A L E N D A R . F O R M A T T I N G -- +-- -- +-- B o d y -- +-- -- +-- Copyright (C) 2006-2017, Free Software Foundation, Inc. -- +-- -- +-- 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 3, 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. -- +-- -- +-- As a special exception under Section 7 of GPL version 3, you are granted -- +-- additional permissions described in the GCC Runtime Library Exception, -- +-- version 3.1, as published by the Free Software Foundation. -- +-- -- +-- You should have received a copy of the GNU General Public License and -- +-- a copy of the GCC Runtime Library Exception along with this program; -- +-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- +-- <http://www.gnu.org/licenses/>. -- +-- -- +-- GNAT was originally developed by the GNAT team at New York University. -- +-- Extensive contributions were provided by Ada Core Technologies Inc. -- +-- -- +------------------------------------------------------------------------------ + +with Ada.Calendar; use Ada.Calendar; +with Ada.Calendar.Time_Zones; use Ada.Calendar.Time_Zones; + +package body Ada.Calendar.Formatting is + + -------------------------- + -- Implementation Notes -- + -------------------------- + + -- All operations in this package are target and time representation + -- independent, thus only one source file is needed for multiple targets. + + procedure Check_Char (S : String; C : Character; Index : Integer); + -- Subsidiary to the two versions of Value. Determine whether the input + -- string S has character C at position Index. Raise Constraint_Error if + -- there is a mismatch. + + procedure Check_Digit (S : String; Index : Integer); + -- Subsidiary to the two versions of Value. Determine whether the character + -- of string S at position Index is a digit. This catches invalid input + -- such as 1983-*1-j3 u5:n7:k9 which should be 1983-01-03 05:07:09. Raise + -- Constraint_Error if there is a mismatch. + + ---------------- + -- Check_Char -- + ---------------- + + procedure Check_Char (S : String; C : Character; Index : Integer) is + begin + if S (Index) /= C then + raise Constraint_Error; + end if; + end Check_Char; + + ----------------- + -- Check_Digit -- + ----------------- + + procedure Check_Digit (S : String; Index : Integer) is + begin + if S (Index) not in '0' .. '9' then + raise Constraint_Error; + end if; + end Check_Digit; + + --------- + -- Day -- + --------- + + function Day + (Date : Time; + Time_Zone : Time_Zones.Time_Offset := 0) return Day_Number + is + Y : Year_Number; + Mo : Month_Number; + D : Day_Number; + H : Hour_Number; + Mi : Minute_Number; + Se : Second_Number; + Ss : Second_Duration; + Le : Boolean; + + pragma Unreferenced (Y, Mo, H, Mi); + + begin + Split (Date, Y, Mo, D, H, Mi, Se, Ss, Le, Time_Zone); + return D; + end Day; + + ----------------- + -- Day_Of_Week -- + ----------------- + + function Day_Of_Week (Date : Time) return Day_Name is + begin + return Day_Name'Val (Formatting_Operations.Day_Of_Week (Date)); + end Day_Of_Week; + + ---------- + -- Hour -- + ---------- + + function Hour + (Date : Time; + Time_Zone : Time_Zones.Time_Offset := 0) return Hour_Number + is + Y : Year_Number; + Mo : Month_Number; + D : Day_Number; + H : Hour_Number; + Mi : Minute_Number; + Se : Second_Number; + Ss : Second_Duration; + Le : Boolean; + + pragma Unreferenced (Y, Mo, D, Mi); + + begin + Split (Date, Y, Mo, D, H, Mi, Se, Ss, Le, Time_Zone); + return H; + end Hour; + + ----------- + -- Image -- + ----------- + + function Image + (Elapsed_Time : Duration; + Include_Time_Fraction : Boolean := False) return String + is + To_Char : constant array (0 .. 9) of Character := "0123456789"; + Hour : Hour_Number; + Minute : Minute_Number; + Second : Second_Number; + Sub_Second : Duration; + SS_Nat : Natural; + + -- Determine the two slice bounds for the result string depending on + -- whether the input is negative and whether fractions are requested. + + First : constant Integer := (if Elapsed_Time < 0.0 then 1 else 2); + Last : constant Integer := (if Include_Time_Fraction then 12 else 9); + + Result : String := "-00:00:00.00"; + + begin + Split (abs (Elapsed_Time), Hour, Minute, Second, Sub_Second); + + -- Hour processing, positions 2 and 3 + + Result (2) := To_Char (Hour / 10); + Result (3) := To_Char (Hour mod 10); + + -- Minute processing, positions 5 and 6 + + Result (5) := To_Char (Minute / 10); + Result (6) := To_Char (Minute mod 10); + + -- Second processing, positions 8 and 9 + + Result (8) := To_Char (Second / 10); + Result (9) := To_Char (Second mod 10); + + -- Optional sub second processing, positions 11 and 12 + + if Include_Time_Fraction and then Sub_Second > 0.0 then + + -- Prevent rounding up when converting to natural, avoiding the zero + -- case to prevent rounding down to a negative number. + + SS_Nat := Natural (Duration'(Sub_Second * 100.0) - 0.5); + + Result (11) := To_Char (SS_Nat / 10); + Result (12) := To_Char (SS_Nat mod 10); + end if; + + return Result (First .. Last); + end Image; + + ----------- + -- Image -- + ----------- + + function Image + (Date : Time; + Include_Time_Fraction : Boolean := False; + Time_Zone : Time_Zones.Time_Offset := 0) return String + is + To_Char : constant array (0 .. 9) of Character := "0123456789"; + + Year : Year_Number; + Month : Month_Number; + Day : Day_Number; + Hour : Hour_Number; + Minute : Minute_Number; + Second : Second_Number; + Sub_Second : Duration; + SS_Nat : Natural; + Leap_Second : Boolean; + + -- The result length depends on whether fractions are requested. + + Result : String := "0000-00-00 00:00:00.00"; + Last : constant Positive := + Result'Last - (if Include_Time_Fraction then 0 else 3); + + begin + Split (Date, Year, Month, Day, + Hour, Minute, Second, Sub_Second, Leap_Second, Time_Zone); + + -- Year processing, positions 1, 2, 3 and 4 + + Result (1) := To_Char (Year / 1000); + Result (2) := To_Char (Year / 100 mod 10); + Result (3) := To_Char (Year / 10 mod 10); + Result (4) := To_Char (Year mod 10); + + -- Month processing, positions 6 and 7 + + Result (6) := To_Char (Month / 10); + Result (7) := To_Char (Month mod 10); + + -- Day processing, positions 9 and 10 + + Result (9) := To_Char (Day / 10); + Result (10) := To_Char (Day mod 10); + + Result (12) := To_Char (Hour / 10); + Result (13) := To_Char (Hour mod 10); + + -- Minute processing, positions 15 and 16 + + Result (15) := To_Char (Minute / 10); + Result (16) := To_Char (Minute mod 10); + + -- Second processing, positions 18 and 19 + + Result (18) := To_Char (Second / 10); + Result (19) := To_Char (Second mod 10); + + -- Optional sub second processing, positions 21 and 22 + + if Include_Time_Fraction and then Sub_Second > 0.0 then + + -- Prevent rounding up when converting to natural, avoiding the zero + -- case to prevent rounding down to a negative number. + + SS_Nat := Natural (Duration'(Sub_Second * 100.0) - 0.5); + + Result (21) := To_Char (SS_Nat / 10); + Result (22) := To_Char (SS_Nat mod 10); + end if; + + return Result (Result'First .. Last); + end Image; + + ------------ + -- Minute -- + ------------ + + function Minute + (Date : Time; + Time_Zone : Time_Zones.Time_Offset := 0) return Minute_Number + is + Y : Year_Number; + Mo : Month_Number; + D : Day_Number; + H : Hour_Number; + Mi : Minute_Number; + Se : Second_Number; + Ss : Second_Duration; + Le : Boolean; + + pragma Unreferenced (Y, Mo, D, H); + + begin + Split (Date, Y, Mo, D, H, Mi, Se, Ss, Le, Time_Zone); + return Mi; + end Minute; + + ----------- + -- Month -- + ----------- + + function Month + (Date : Time; + Time_Zone : Time_Zones.Time_Offset := 0) return Month_Number + is + Y : Year_Number; + Mo : Month_Number; + D : Day_Number; + H : Hour_Number; + Mi : Minute_Number; + Se : Second_Number; + Ss : Second_Duration; + Le : Boolean; + + pragma Unreferenced (Y, D, H, Mi); + + begin + Split (Date, Y, Mo, D, H, Mi, Se, Ss, Le, Time_Zone); + return Mo; + end Month; + + ------------ + -- Second -- + ------------ + + function Second (Date : Time) return Second_Number is + Y : Year_Number; + Mo : Month_Number; + D : Day_Number; + H : Hour_Number; + Mi : Minute_Number; + Se : Second_Number; + Ss : Second_Duration; + Le : Boolean; + + pragma Unreferenced (Y, Mo, D, H, Mi); + + begin + Split (Date, Y, Mo, D, H, Mi, Se, Ss, Le); + return Se; + end Second; + + ---------------- + -- Seconds_Of -- + ---------------- + + function Seconds_Of + (Hour : Hour_Number; + Minute : Minute_Number; + Second : Second_Number := 0; + Sub_Second : Second_Duration := 0.0) return Day_Duration is + + begin + -- Validity checks + + if not Hour'Valid + or else not Minute'Valid + or else not Second'Valid + or else not Sub_Second'Valid + then + raise Constraint_Error; + end if; + + return Day_Duration (Hour * 3_600) + + Day_Duration (Minute * 60) + + Day_Duration (Second) + + Sub_Second; + end Seconds_Of; + + ----------- + -- Split -- + ----------- + + procedure Split + (Seconds : Day_Duration; + Hour : out Hour_Number; + Minute : out Minute_Number; + Second : out Second_Number; + Sub_Second : out Second_Duration) + is + Secs : Natural; + + begin + -- Validity checks + + if not Seconds'Valid then + raise Constraint_Error; + end if; + + Secs := (if Seconds = 0.0 then 0 else Natural (Seconds - 0.5)); + + Sub_Second := Second_Duration (Seconds - Day_Duration (Secs)); + Hour := Hour_Number (Secs / 3_600); + Secs := Secs mod 3_600; + Minute := Minute_Number (Secs / 60); + Second := Second_Number (Secs mod 60); + + -- Validity checks + + if not Hour'Valid + or else not Minute'Valid + or else not Second'Valid + or else not Sub_Second'Valid + then + raise Time_Error; + end if; + end Split; + + ----------- + -- Split -- + ----------- + + procedure Split + (Date : Time; + Year : out Year_Number; + Month : out Month_Number; + Day : out Day_Number; + Seconds : out Day_Duration; + Leap_Second : out Boolean; + Time_Zone : Time_Zones.Time_Offset := 0) + is + H : Integer; + M : Integer; + Se : Integer; + Su : Duration; + Tz : constant Long_Integer := Long_Integer (Time_Zone); + + begin + Formatting_Operations.Split + (Date => Date, + Year => Year, + Month => Month, + Day => Day, + Day_Secs => Seconds, + Hour => H, + Minute => M, + Second => Se, + Sub_Sec => Su, + Leap_Sec => Leap_Second, + Use_TZ => True, + Is_Historic => True, + Time_Zone => Tz); + + -- Validity checks + + if not Year'Valid + or else not Month'Valid + or else not Day'Valid + or else not Seconds'Valid + then + raise Time_Error; + end if; + end Split; + + ----------- + -- Split -- + ----------- + + procedure Split + (Date : Time; + Year : out Year_Number; + Month : out Month_Number; + Day : out Day_Number; + Hour : out Hour_Number; + Minute : out Minute_Number; + Second : out Second_Number; + Sub_Second : out Second_Duration; + Time_Zone : Time_Zones.Time_Offset := 0) + is + Dd : Day_Duration; + Le : Boolean; + Tz : constant Long_Integer := Long_Integer (Time_Zone); + + begin + Formatting_Operations.Split + (Date => Date, + Year => Year, + Month => Month, + Day => Day, + Day_Secs => Dd, + Hour => Hour, + Minute => Minute, + Second => Second, + Sub_Sec => Sub_Second, + Leap_Sec => Le, + Use_TZ => True, + Is_Historic => True, + Time_Zone => Tz); + + -- Validity 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 + or else not Sub_Second'Valid + then + raise Time_Error; + end if; + end Split; + + ----------- + -- Split -- + ----------- + + procedure Split + (Date : Time; + Year : out Year_Number; + Month : out Month_Number; + Day : out Day_Number; + Hour : out Hour_Number; + Minute : out Minute_Number; + Second : out Second_Number; + Sub_Second : out Second_Duration; + Leap_Second : out Boolean; + Time_Zone : Time_Zones.Time_Offset := 0) + is + Dd : Day_Duration; + Tz : constant Long_Integer := Long_Integer (Time_Zone); + + begin + Formatting_Operations.Split + (Date => Date, + Year => Year, + Month => Month, + Day => Day, + Day_Secs => Dd, + Hour => Hour, + Minute => Minute, + Second => Second, + Sub_Sec => Sub_Second, + Leap_Sec => Leap_Second, + Use_TZ => True, + Is_Historic => True, + Time_Zone => Tz); + + -- Validity 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 + or else not Sub_Second'Valid + then + raise Time_Error; + end if; + end Split; + + ---------------- + -- Sub_Second -- + ---------------- + + function Sub_Second (Date : Time) return Second_Duration is + Y : Year_Number; + Mo : Month_Number; + D : Day_Number; + H : Hour_Number; + Mi : Minute_Number; + Se : Second_Number; + Ss : Second_Duration; + Le : Boolean; + + pragma Unreferenced (Y, Mo, D, H, Mi); + + begin + Split (Date, Y, Mo, D, H, Mi, Se, Ss, Le); + return Ss; + end Sub_Second; + + ------------- + -- Time_Of -- + ------------- + + function Time_Of + (Year : Year_Number; + Month : Month_Number; + Day : Day_Number; + Seconds : Day_Duration := 0.0; + Leap_Second : Boolean := False; + Time_Zone : Time_Zones.Time_Offset := 0) return Time + is + Adj_Year : Year_Number := Year; + Adj_Month : Month_Number := Month; + Adj_Day : Day_Number := Day; + + H : constant Integer := 1; + M : constant Integer := 1; + Se : constant Integer := 1; + Ss : constant Duration := 0.1; + Tz : constant Long_Integer := Long_Integer (Time_Zone); + + begin + -- Validity checks + + if not Year'Valid + or else not Month'Valid + or else not Day'Valid + or else not Seconds'Valid + or else not Time_Zone'Valid + then + raise Constraint_Error; + end if; + + -- A Seconds value of 86_400 denotes a new day. This case requires an + -- adjustment to the input values. + + if Seconds = 86_400.0 then + if Day < Days_In_Month (Month) + or else (Is_Leap (Year) + and then Month = 2) + then + Adj_Day := Day + 1; + else + Adj_Day := 1; + + if Month < 12 then + Adj_Month := Month + 1; + else + Adj_Month := 1; + Adj_Year := Year + 1; + end if; + end if; + end if; + + return + Formatting_Operations.Time_Of + (Year => Adj_Year, + Month => Adj_Month, + Day => Adj_Day, + Day_Secs => Seconds, + Hour => H, + Minute => M, + Second => Se, + Sub_Sec => Ss, + Leap_Sec => Leap_Second, + Use_Day_Secs => True, + Use_TZ => True, + Is_Historic => True, + Time_Zone => Tz); + end Time_Of; + + ------------- + -- Time_Of -- + ------------- + + function Time_Of + (Year : Year_Number; + Month : Month_Number; + Day : Day_Number; + Hour : Hour_Number; + Minute : Minute_Number; + Second : Second_Number; + Sub_Second : Second_Duration := 0.0; + Leap_Second : Boolean := False; + Time_Zone : Time_Zones.Time_Offset := 0) return Time + is + Dd : constant Day_Duration := Day_Duration'First; + Tz : constant Long_Integer := Long_Integer (Time_Zone); + + begin + -- Validity 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 + or else not Sub_Second'Valid + or else not Time_Zone'Valid + then + raise Constraint_Error; + end if; + + return + Formatting_Operations.Time_Of + (Year => Year, + Month => Month, + Day => Day, + Day_Secs => Dd, + Hour => Hour, + Minute => Minute, + Second => Second, + Sub_Sec => Sub_Second, + Leap_Sec => Leap_Second, + Use_Day_Secs => False, + Use_TZ => True, + Is_Historic => True, + Time_Zone => Tz); + end Time_Of; + + ----------- + -- Value -- + ----------- + + function Value + (Date : String; + Time_Zone : Time_Zones.Time_Offset := 0) return Time + is + D : String (1 .. 22); + Year : Year_Number; + Month : Month_Number; + Day : Day_Number; + Hour : Hour_Number; + Minute : Minute_Number; + Second : Second_Number; + Sub_Second : Second_Duration := 0.0; + + begin + -- Validity checks + + if not Time_Zone'Valid then + raise Constraint_Error; + end if; + + -- Length checks + + if Date'Length /= 19 + and then Date'Length /= 22 + then + raise Constraint_Error; + end if; + + -- After the correct length has been determined, it is safe to copy the + -- Date in order to avoid Date'First + N indexing. + + D (1 .. Date'Length) := Date; + + -- Format checks + + Check_Char (D, '-', 5); + Check_Char (D, '-', 8); + Check_Char (D, ' ', 11); + Check_Char (D, ':', 14); + Check_Char (D, ':', 17); + + if Date'Length = 22 then + Check_Char (D, '.', 20); + end if; + + -- Leading zero checks + + Check_Digit (D, 6); + Check_Digit (D, 9); + Check_Digit (D, 12); + Check_Digit (D, 15); + Check_Digit (D, 18); + + if Date'Length = 22 then + Check_Digit (D, 21); + end if; + + -- Value extraction + + Year := Year_Number (Year_Number'Value (D (1 .. 4))); + Month := Month_Number (Month_Number'Value (D (6 .. 7))); + Day := Day_Number (Day_Number'Value (D (9 .. 10))); + Hour := Hour_Number (Hour_Number'Value (D (12 .. 13))); + Minute := Minute_Number (Minute_Number'Value (D (15 .. 16))); + Second := Second_Number (Second_Number'Value (D (18 .. 19))); + + -- Optional part + + if Date'Length = 22 then + Sub_Second := Second_Duration (Second_Duration'Value (D (20 .. 22))); + 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 + or else not Sub_Second'Valid + then + raise Constraint_Error; + end if; + + return Time_Of (Year, Month, Day, + Hour, Minute, Second, Sub_Second, False, Time_Zone); + + exception + when others => raise Constraint_Error; + end Value; + + ----------- + -- Value -- + ----------- + + function Value (Elapsed_Time : String) return Duration is + D : String (1 .. 11); + Hour : Hour_Number; + Minute : Minute_Number; + Second : Second_Number; + Sub_Second : Second_Duration := 0.0; + + begin + -- Length checks + + if Elapsed_Time'Length /= 8 + and then Elapsed_Time'Length /= 11 + then + raise Constraint_Error; + end if; + + -- After the correct length has been determined, it is safe to copy the + -- Elapsed_Time in order to avoid Date'First + N indexing. + + D (1 .. Elapsed_Time'Length) := Elapsed_Time; + + -- Format checks + + Check_Char (D, ':', 3); + Check_Char (D, ':', 6); + + if Elapsed_Time'Length = 11 then + Check_Char (D, '.', 9); + end if; + + -- Leading zero checks + + Check_Digit (D, 1); + Check_Digit (D, 4); + Check_Digit (D, 7); + + if Elapsed_Time'Length = 11 then + Check_Digit (D, 10); + end if; + + -- Value extraction + + Hour := Hour_Number (Hour_Number'Value (D (1 .. 2))); + Minute := Minute_Number (Minute_Number'Value (D (4 .. 5))); + Second := Second_Number (Second_Number'Value (D (7 .. 8))); + + -- Optional part + + if Elapsed_Time'Length = 11 then + Sub_Second := Second_Duration (Second_Duration'Value (D (9 .. 11))); + end if; + + -- Sanity checks + + if not Hour'Valid + or else not Minute'Valid + or else not Second'Valid + or else not Sub_Second'Valid + then + raise Constraint_Error; + end if; + + return Seconds_Of (Hour, Minute, Second, Sub_Second); + + exception + when others => raise Constraint_Error; + end Value; + + ---------- + -- Year -- + ---------- + + function Year + (Date : Time; + Time_Zone : Time_Zones.Time_Offset := 0) return Year_Number + is + Y : Year_Number; + Mo : Month_Number; + D : Day_Number; + H : Hour_Number; + Mi : Minute_Number; + Se : Second_Number; + Ss : Second_Duration; + Le : Boolean; + + pragma Unreferenced (Mo, D, H, Mi); + + begin + Split (Date, Y, Mo, D, H, Mi, Se, Ss, Le, Time_Zone); + return Y; + end Year; + +end Ada.Calendar.Formatting; |