1 ------------------------------------------------------------------------------
3 -- GNAT RUN-TIME COMPONENTS --
5 -- G N A T . C A L E N D A R . T I M E _ I O --
9 -- Copyright (C) 1999-2006, AdaCore --
11 -- This specification is derived from the Ada Reference Manual for use with --
12 -- GNAT. The copyright notice above, and the license provisions that follow --
13 -- apply solely to the contents of the part following the private keyword. --
15 -- GNAT is free software; you can redistribute it and/or modify it under --
16 -- terms of the GNU General Public License as published by the Free Soft- --
17 -- ware Foundation; either version 2, or (at your option) any later ver- --
18 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
19 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
20 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
21 -- for more details. You should have received a copy of the GNU General --
22 -- Public License distributed with GNAT; see file COPYING. If not, write --
23 -- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
24 -- Boston, MA 02110-1301, USA. --
26 -- As a special exception, if other files instantiate generics from this --
27 -- unit, or you link this unit with other files to produce an executable, --
28 -- this unit does not by itself cause the resulting executable to be --
29 -- covered by the GNU General Public License. This exception does not --
30 -- however invalidate any other reasons why the executable file might be --
31 -- covered by the GNU Public License. --
33 -- GNAT was originally developed by the GNAT team at New York University. --
34 -- Extensive contributions were provided by Ada Core Technologies Inc. --
36 ------------------------------------------------------------------------------
38 with Ada.Calendar; use Ada.Calendar;
39 with Ada.Characters.Handling;
40 with Ada.Strings.Unbounded; use Ada.Strings.Unbounded;
43 package body GNAT.Calendar.Time_IO is
59 type Padding_Mode is (None, Zero, Space);
61 type Sec_Number is mod 2 ** 64;
62 -- Type used to compute the number of seconds since 01/01/1970. A 32 bit
63 -- number will cover only a period of 136 years. This means that for date
64 -- past 2106 the computation is not possible. A 64 bits number should be
65 -- enough for a very large period of time.
67 -----------------------
68 -- Local Subprograms --
69 -----------------------
71 function Am_Pm (H : Natural) return String;
72 -- Return AM or PM depending on the hour H
74 function Hour_12 (H : Natural) return Positive;
75 -- Convert a 1-24h format to a 0-12 hour format
77 function Image (Str : String; Length : Natural := 0) return String;
78 -- Return Str capitalized and cut to length number of characters. If
79 -- length is set to 0 it does not cut it.
83 Padding : Padding_Mode := Zero;
84 Length : Natural := 0) return String;
85 -- Return image of N. This number is eventually padded with zeros or spaces
86 -- depending of the length required. If length is 0 then no padding occurs.
90 Padding : Padding_Mode := Zero;
91 Length : Natural := 0) return String;
92 -- As above with N provided in Integer format
98 function Am_Pm (H : Natural) return String is
100 if H = 0 or else H > 12 then
111 function Hour_12 (H : Natural) return Positive is
128 Length : Natural := 0) return String
130 use Ada.Characters.Handling;
131 Local : constant String :=
132 To_Upper (Str (1)) & To_Lower (Str (2 .. Str'Last));
137 return Local (1 .. Length);
147 Padding : Padding_Mode := Zero;
148 Length : Natural := 0) return String
151 return Image (Sec_Number (N), Padding, Length);
156 Padding : Padding_Mode := Zero;
157 Length : Natural := 0) return String
159 function Pad_Char return String;
165 function Pad_Char return String is
168 when None => return "";
169 when Zero => return "00";
170 when Space => return " ";
174 NI : constant String := Sec_Number'Image (N);
175 NIP : constant String := Pad_Char & NI (2 .. NI'Last);
177 -- Start of processing for Image
180 if Length = 0 or else Padding = None then
181 return NI (2 .. NI'Last);
183 return NIP (NIP'Last - Length + 1 .. NIP'Last);
192 (Date : Ada.Calendar.Time;
193 Picture : Picture_String) return String
195 Padding : Padding_Mode := Zero;
196 -- Padding is set for one directive
198 Result : Unbounded_String;
201 Month : Month_Number;
204 Minute : Minute_Number;
205 Second : Second_Number;
206 Sub_Second : Second_Duration;
208 P : Positive := Picture'First;
211 Split (Date, Year, Month, Day, Hour, Minute, Second, Sub_Second);
214 -- A directive has the following format "%[-_]."
216 if Picture (P) = '%' then
220 if P = Picture'Last then
224 -- Check for GNU extension to change the padding
226 if Picture (P + 1) = '-' then
229 elsif Picture (P + 1) = '_' then
234 if P = Picture'Last then
238 case Picture (P + 1) is
243 Result := Result & '%';
248 Result := Result & ASCII.LF;
253 Result := Result & ASCII.HT;
258 Result := Result & Image (Hour, Padding, 2);
263 Result := Result & Image (Hour_12 (Hour), Padding, 2);
268 Result := Result & Image (Hour, Space, 2);
273 Result := Result & Image (Hour_12 (Hour), Space, 2);
278 Result := Result & Image (Minute, Padding, 2);
283 Result := Result & Am_Pm (Hour);
285 -- Time, 12-hour (hh:mm:ss [AP]M)
289 Image (Hour_12 (Hour), Padding, Length => 2) & ':' &
290 Image (Minute, Padding, Length => 2) & ':' &
291 Image (Second, Padding, Length => 2) & ' ' &
294 -- Seconds since 1970-01-01 00:00:00 UTC
295 -- (a nonstandard extension)
299 Sec : constant Sec_Number :=
300 Sec_Number (Julian_Day (Year, Month, Day) -
301 Julian_Day (1970, 1, 1)) * 86_400
302 + Sec_Number (Hour) * 3_600
303 + Sec_Number (Minute) * 60
304 + Sec_Number (Second);
307 Result := Result & Image (Sec, None);
313 Result := Result & Image (Second, Padding, Length => 2);
315 -- Milliseconds (3 digits)
316 -- Microseconds (6 digits)
317 -- Nanoseconds (9 digits)
319 when 'i' | 'e' | 'o' =>
321 Sub_Sec : constant Long_Integer :=
322 Long_Integer (Sub_Second * 1_000_000_000);
324 Img1 : constant String := Sub_Sec'Img;
325 Img2 : constant String :=
326 "00000000" & Img1 (Img1'First + 1 .. Img1'Last);
327 Nanos : constant String :=
328 Img2 (Img2'Last - 8 .. Img2'Last);
331 case Picture (P + 1) is
334 Nanos (Nanos'First .. Nanos'First + 2);
338 Nanos (Nanos'First .. Nanos'First + 5);
341 Result := Result & Nanos;
348 -- Time, 24-hour (hh:mm:ss)
352 Image (Hour, Padding, Length => 2) & ':' &
353 Image (Minute, Padding, Length => 2) & ':' &
354 Image (Second, Padding, Length => 2);
356 -- Locale's abbreviated weekday name (Sun..Sat)
360 Image (Day_Name'Image (Day_Of_Week (Date)), 3);
362 -- Locale's full weekday name, variable length
363 -- (Sunday..Saturday)
367 Image (Day_Name'Image (Day_Of_Week (Date)));
369 -- Locale's abbreviated month name (Jan..Dec)
373 Image (Month_Name'Image (Month_Name'Val (Month - 1)), 3);
375 -- Locale's full month name, variable length
376 -- (January..December)
380 Image (Month_Name'Image (Month_Name'Val (Month - 1)));
382 -- Locale's date and time (Sat Nov 04 12:02:33 EST 1989)
387 Result := Result & Image (Date, "%a %b %d %T %Y");
389 Result := Result & Image (Date, "%a %b %_d %_T %Y");
391 Result := Result & Image (Date, "%a %b %-d %-T %Y");
394 -- Day of month (01..31)
397 Result := Result & Image (Day, Padding, 2);
403 Image (Month, Padding, 2) & '/' &
404 Image (Day, Padding, 2) & '/' &
405 Image (Year, Padding, 2);
407 -- Day of year (001..366)
410 Result := Result & Image (Day_In_Year (Date), Padding, 3);
415 Result := Result & Image (Month, Padding, 2);
417 -- Week number of year with Sunday as first day of week
422 Offset : constant Natural :=
423 (Julian_Day (Year, 1, 1) + 1) mod 7;
425 Week : constant Natural :=
426 1 + ((Day_In_Year (Date) - 1) + Offset) / 7;
429 Result := Result & Image (Week, Padding, 2);
432 -- Day of week (0..6) with 0 corresponding to Sunday
436 DOW : Natural range 0 .. 6;
439 if Day_Of_Week (Date) = Sunday then
442 DOW := Day_Name'Pos (Day_Of_Week (Date));
445 Result := Result & Image (DOW, Length => 1);
448 -- Week number of year with Monday as first day of week
452 Result := Result & Image (Week_In_Year (Date), Padding, 2);
454 -- Last two digits of year (00..99)
458 Y : constant Natural := Year - (Year / 100) * 100;
460 Result := Result & Image (Y, Padding, 2);
466 Result := Result & Image (Year, None, 4);
475 Result := Result & Picture (P);
479 exit when P > Picture'Last;
483 return To_String (Result);
491 (Date : Ada.Calendar.Time;
492 Picture : Picture_String)
495 Ada.Text_IO.Put (Image (Date, Picture));
498 end GNAT.Calendar.Time_IO;