Many hyperlinks are disabled.
Use anonymous login
to enable hyperlinks.
Overview
| Comment: | time_io-rfc_3339: new package for time I/O according to RFC-3339 |
|---|---|
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
0e268efe7a5ad741c02931c4236b00dd |
| User & Date: | nat 2014-08-17 21:58:35.047 |
Context
|
2014-08-18
| ||
| 19:21 | time_io-tests: add a test suite for RFC-3339 check-in: 0bfc3117df user: nat tags: trunk | |
|
2014-08-17
| ||
| 21:58 | time_io-rfc_3339: new package for time I/O according to RFC-3339 check-in: 0e268efe7a user: nat tags: trunk | |
|
2014-08-16
| ||
| 17:33 | time_io-tests: test suite for Time_IO subprograms, checking time interval images check-in: 830bf444c4 user: nat tags: trunk | |
Changes
Added src/natools-time_io-rfc_3339.adb.
> > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 |
------------------------------------------------------------------------------
-- Copyright (c) 2014, Natacha Porté --
-- --
-- Permission to use, copy, modify, and distribute this software for any --
-- purpose with or without fee is hereby granted, provided that the above --
-- copyright notice and this permission notice appear in all copies. --
-- --
-- THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES --
-- WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF --
-- MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR --
-- ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES --
-- WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN --
-- ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF --
-- OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. --
------------------------------------------------------------------------------
------------------------------------------------------------------------------
-- Natools.Time_IO provides subprograms to serialize and deserialize times --
-- to and from various String representations. --
------------------------------------------------------------------------------
with Ada.Calendar.Formatting;
package body Natools.Time_IO.RFC_3339 is
---------------------
-- Validity Checks --
---------------------
function Is_Valid_Prefix (Image : String) return Boolean
is (Image (Image'First) in Digit_Character
and then Image (Image'First + 1) in Digit_Character
and then Image (Image'First + 2) in Digit_Character
and then Image (Image'First + 3) in Digit_Character
and then Image (Image'First + 4) = Date_Separator
and then Image (Image'First + 5) in Digit_Character
and then Image (Image'First + 6) in Digit_Character
and then Image (Image'First + 7) = Date_Separator
and then Image (Image'First + 8) in Digit_Character
and then Image (Image'First + 9) in Digit_Character
and then Image (Image'First + 10) = Date_Time_Separator
and then Image (Image'First + 11) in Digit_Character
and then Image (Image'First + 12) in Digit_Character
and then Image (Image'First + 13) = Time_Separator
and then Image (Image'First + 14) in Digit_Character
and then Image (Image'First + 15) in Digit_Character
and then Image (Image'First + 16) = Time_Separator
and then Image (Image'First + 17) in Digit_Character
and then Image (Image'First + 18) in Digit_Character);
function Is_Valid_Time_Zone (Image : String) return Boolean
is (Image (Image'Last - 5) in '+' | '-'
and then Image (Image'Last - 4) in Digit_Character
and then Image (Image'Last - 3) in Digit_Character
and then Image (Image'Last - 2) = Time_Separator
and then Image (Image'Last - 1) in Digit_Character
and then Image (Image'Last) in Digit_Character);
function Is_Valid_Subsecond (Sub_Image : String) return Boolean
is (Sub_Image'Length = 0
or else (Sub_Image'Length >= 2
and then Sub_Image (Sub_Image'First) = Subsecond_Separator
and then (for all I in Sub_Image'First + 1 .. Sub_Image'Last
=> Sub_Image (I) in Digit_Character)));
function Is_Valid (Image : String) return Boolean is
begin
return Image'Length >= 20
and then Is_Valid_Prefix (Image)
and then ((Image (Image'Last) = 'Z'
and then Is_Valid_Subsecond
(Image (Image'First + 19 .. Image'Last - 1)))
or else (Is_Valid_Time_Zone (Image)
and then Is_Valid_Subsecond
(Image (Image'First + 19 .. Image'Last - 6))));
end Is_Valid;
--------------------
-- Time To String --
--------------------
function Image
(Date : Ada.Calendar.Time;
Subsecond_Digits : Natural := 0)
return String is
begin
return Image
(Date,
Ada.Calendar.Time_Zones.UTC_Time_Offset (Date),
Subsecond_Digits);
end Image;
function Image
(Date : Ada.Calendar.Time;
Time_Zone : Ada.Calendar.Time_Zones.Time_Offset;
Subsecond_Digits : Natural := 0)
return String
is
function Subsecond_Image
(Subsecond : Ada.Calendar.Formatting.Second_Duration)
return String;
function Time_Zone_Image return String;
function Subsecond_Image
(Subsecond : Ada.Calendar.Formatting.Second_Duration)
return String
is
Remaining : Duration := Subsecond;
Number : Digit_Number;
N : Natural;
begin
if Subsecond_Digits = 0 then
return "";
end if;
return Result : String (1 .. Subsecond_Digits + 1) do
Result (1) := Subsecond_Separator;
for I in 2 .. Subsecond_Digits + 1 loop
Remaining := Remaining * 10;
N := Natural (Remaining);
if Duration (N) > Remaining then
Number := N - 1;
else
Number := N;
end if;
Remaining := Remaining - Duration (Number);
Result (I) := Image (Number);
end loop;
end return;
end Subsecond_Image;
function Time_Zone_Image return String is
use type Ada.Calendar.Time_Zones.Time_Offset;
begin
if Time_Zone = 0 then
return "Z";
else
declare
Hour : constant Ada.Calendar.Time_Zones.Time_Offset
:= (abs Time_Zone) / 60;
Minute : constant Ada.Calendar.Time_Zones.Time_Offset
:= (abs Time_Zone) mod 60;
Sign : Character;
begin
if Time_Zone < 0 then
Sign := '-';
else
Sign := '+';
end if;
return String'(Sign,
Image (Digit_Number (Hour / 10)),
Image (Digit_Number (Hour mod 10)),
Time_Separator,
Image (Digit_Number (Minute / 10)),
Image (Digit_Number (Minute mod 10)));
end;
end if;
end Time_Zone_Image;
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;
Leap_Second : Boolean;
Used_Second : Natural;
begin
Ada.Calendar.Formatting.Split
(Date,
Year, Month, Day,
Hour, Minute, Second,
Subsecond,
Leap_Second,
Time_Zone);
if Leap_Second then
pragma Assert (Second = 59);
Used_Second := 60;
else
Used_Second := Second;
end if;
return
(Image (Year / 1000),
Image ((Year / 100) mod 10),
Image ((Year / 10) mod 10),
Image (Year mod 10),
Date_Separator,
Image (Month / 10),
Image (Month mod 10),
Date_Separator,
Image (Day / 10),
Image (Day mod 10),
Date_Time_Separator,
Image (Hour / 10),
Image (Hour mod 10),
Time_Separator,
Image (Minute / 10),
Image (Minute mod 10),
Time_Separator,
Image (Used_Second / 10),
Image (Used_Second mod 10))
& Subsecond_Image (Subsecond)
& Time_Zone_Image;
end Image;
--------------------
-- String To Time --
--------------------
function Value (Image : String) return Ada.Calendar.Time is
Result : Ada.Calendar.Time;
Discarded : Ada.Calendar.Time_Zones.Time_Offset;
begin
Value (Image, Result, Discarded);
return Result;
end Value;
procedure Value
(Image : in String;
Date : out Ada.Calendar.Time;
Time_Zone : out Ada.Calendar.Time_Zones.Time_Offset)
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
Second := Number;
end if;
end;
if Image (Image'First + 19) = Subsecond_Separator then
declare
I : Positive := Image'First + 20;
Current : Duration := 0.1;
begin
while Image (I) in Digit_Character loop
Subsecond := Subsecond + Current
* (Character'Pos (Image (I)) - Character'Pos ('0'));
Current := Current / 10;
I := I + 1;
end loop;
end;
end if;
if Image (Image'Last) = 'Z' then
Time_Zone := 0;
else
Time_Zone := Ada.Calendar.Time_Zones.Time_Offset
(Natural'Value (Image (Image'Last - 4 .. Image'Last - 3)) * 60
+ Natural'Value (Image (Image'Last - 1 .. Image'Last)));
case Image (Image'Last - 5) is
when '-' =>
Time_Zone := Ada.Calendar.Time_Zones."-" (Time_Zone);
when '+' =>
null;
when others =>
raise Constraint_Error
with "Invalid time zone separator in RFC 3339 date";
end case;
end if;
Date := Ada.Calendar.Formatting.Time_Of
(Year, Month, Day,
Hour, Minute, Second,
Subsecond, Leap_Second, Time_Zone);
end Value;
end Natools.Time_IO.RFC_3339;
|
Added src/natools-time_io-rfc_3339.ads.
> > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 |
------------------------------------------------------------------------------
-- Copyright (c) 2014, Natacha Porté --
-- --
-- Permission to use, copy, modify, and distribute this software for any --
-- purpose with or without fee is hereby granted, provided that the above --
-- copyright notice and this permission notice appear in all copies. --
-- --
-- THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES --
-- WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF --
-- MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR --
-- ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES --
-- WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN --
-- ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF --
-- OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. --
------------------------------------------------------------------------------
------------------------------------------------------------------------------
-- Natools.Time_IO.RFC_3339 provides subprograms to serialize and --
-- deserialize times to and from String representations according to --
-- RFC 3339, which is also a valid subset of ISO 8601. --
------------------------------------------------------------------------------
with Ada.Calendar.Time_Zones;
package Natools.Time_IO.RFC_3339 is
Date_Separator : constant Character := '-';
Date_Time_Separator : constant Character := 'T';
Time_Separator : constant Character := ':';
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)
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)
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
end Natools.Time_IO.RFC_3339;
|