1 ------------------------------------------------------------------------------
3 -- GNAT RUN-TIME COMPONENTS --
5 -- A D A . W I D E _ W I D E _ T E X T _ I O . E D I T I N G --
9 -- Copyright (C) 1992-2006, Free Software Foundation, Inc. --
11 -- GNAT is free software; you can redistribute it and/or modify it under --
12 -- terms of the GNU General Public License as published by the Free Soft- --
13 -- ware Foundation; either version 2, or (at your option) any later ver- --
14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNAT; see file COPYING. If not, write --
19 -- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
20 -- Boston, MA 02110-1301, USA. --
22 -- As a special exception, if other files instantiate generics from this --
23 -- unit, or you link this unit with other files to produce an executable, --
24 -- this unit does not by itself cause the resulting executable to be --
25 -- covered by the GNU General Public License. This exception does not --
26 -- however invalidate any other reasons why the executable file might be --
27 -- covered by the GNU Public License. --
29 -- GNAT was originally developed by the GNAT team at New York University. --
30 -- Extensive contributions were provided by Ada Core Technologies Inc. --
32 ------------------------------------------------------------------------------
34 with Ada.Strings.Fixed;
35 with Ada.Strings.Wide_Wide_Fixed;
37 package body Ada.Wide_Wide_Text_IO.Editing is
39 package Strings renames Ada.Strings;
40 package Strings_Fixed renames Ada.Strings.Fixed;
41 package Strings_Wide_Wide_Fixed renames Ada.Strings.Wide_Wide_Fixed;
42 package Wide_Wide_Text_IO renames Ada.Wide_Wide_Text_IO;
44 -----------------------
45 -- Local_Subprograms --
46 -----------------------
48 function To_Wide (C : Character) return Wide_Wide_Character;
49 pragma Inline (To_Wide);
50 -- Convert Character to corresponding Wide_Wide_Character
56 function Blank_When_Zero (Pic : Picture) return Boolean is
58 return Pic.Contents.Original_BWZ;
65 package body Decimal_Output is
74 Currency : Wide_Wide_String := Default_Currency;
75 Fill : Wide_Wide_Character := Default_Fill;
76 Separator : Wide_Wide_Character := Default_Separator;
77 Radix_Mark : Wide_Wide_Character := Default_Radix_Mark)
78 return Wide_Wide_String
82 (Pic.Contents, Num'Image (Item),
83 Currency, Fill, Separator, Radix_Mark);
92 Currency : Wide_Wide_String := Default_Currency) return Natural
94 Picstr : constant String := Pic_String (Pic);
95 V_Adjust : Integer := 0;
96 Cur_Adjust : Integer := 0;
99 -- Check if Picstr has 'V' or '$'
101 -- If 'V', then length is 1 less than otherwise
103 -- If '$', then length is Currency'Length-1 more than otherwise
105 -- This should use the string handling package ???
107 for J in Picstr'Range loop
108 if Picstr (J) = 'V' then
111 elsif Picstr (J) = '$' then
112 Cur_Adjust := Currency'Length - 1;
116 return Picstr'Length - V_Adjust + Cur_Adjust;
124 (File : Wide_Wide_Text_IO.File_Type;
127 Currency : Wide_Wide_String := Default_Currency;
128 Fill : Wide_Wide_Character := Default_Fill;
129 Separator : Wide_Wide_Character := Default_Separator;
130 Radix_Mark : Wide_Wide_Character := Default_Radix_Mark)
133 Wide_Wide_Text_IO.Put (File, Image (Item, Pic,
134 Currency, Fill, Separator, Radix_Mark));
140 Currency : Wide_Wide_String := Default_Currency;
141 Fill : Wide_Wide_Character := Default_Fill;
142 Separator : Wide_Wide_Character := Default_Separator;
143 Radix_Mark : Wide_Wide_Character := Default_Radix_Mark)
146 Wide_Wide_Text_IO.Put (Image (Item, Pic,
147 Currency, Fill, Separator, Radix_Mark));
151 (To : out Wide_Wide_String;
154 Currency : Wide_Wide_String := Default_Currency;
155 Fill : Wide_Wide_Character := Default_Fill;
156 Separator : Wide_Wide_Character := Default_Separator;
157 Radix_Mark : Wide_Wide_Character := Default_Radix_Mark)
159 Result : constant Wide_Wide_String :=
160 Image (Item, Pic, Currency, Fill, Separator, Radix_Mark);
163 if Result'Length > To'Length then
164 raise Wide_Wide_Text_IO.Layout_Error;
166 Strings_Wide_Wide_Fixed.Move (Source => Result, Target => To,
167 Justify => Strings.Right);
178 Currency : Wide_Wide_String := Default_Currency) return Boolean
182 Temp : constant Wide_Wide_String := Image (Item, Pic, Currency);
183 pragma Warnings (Off, Temp);
189 when Layout_Error => return False;
198 function Expand (Picture : String) return String is
199 Result : String (1 .. MAX_PICSIZE);
200 Picture_Index : Integer := Picture'First;
201 Result_Index : Integer := Result'First;
206 if Picture'Length < 1 then
210 if Picture (Picture'First) = '(' then
215 case Picture (Picture_Index) is
219 -- We now need to scan out the count after a left paren. In
220 -- the non-wide version we used Integer_IO.Get, but that is
221 -- not convenient here, since we don't want to drag in normal
222 -- Text_IO just for this purpose. So we do the scan ourselves,
223 -- with the normal validity checks.
225 Last := Picture_Index + 1;
228 if Picture (Last) not in '0' .. '9' then
232 Count := Character'Pos (Picture (Last)) - Character'Pos ('0');
236 if Last > Picture'Last then
240 if Picture (Last) = '_' then
241 if Picture (Last - 1) = '_' then
245 elsif Picture (Last) = ')' then
248 elsif Picture (Last) not in '0' .. '9' then
253 + Character'Pos (Picture (Last)) -
260 -- In what follows note that one copy of the repeated
261 -- character has already been made, so a count of one is
262 -- no-op, and a count of zero erases a character.
264 for J in 2 .. Count loop
265 Result (Result_Index + J - 2) := Picture (Picture_Index - 1);
268 Result_Index := Result_Index + Count - 1;
270 -- Last was a ')' throw it away too
272 Picture_Index := Last + 1;
278 Result (Result_Index) := Picture (Picture_Index);
279 Picture_Index := Picture_Index + 1;
280 Result_Index := Result_Index + 1;
284 exit when Picture_Index > Picture'Last;
287 return Result (1 .. Result_Index - 1);
298 function Format_Number
299 (Pic : Format_Record;
301 Currency_Symbol : Wide_Wide_String;
302 Fill_Character : Wide_Wide_Character;
303 Separator_Character : Wide_Wide_Character;
304 Radix_Point : Wide_Wide_Character) return Wide_Wide_String
306 Attrs : Number_Attributes := Parse_Number_String (Number);
308 Rounded : String := Number;
310 Sign_Position : Integer := Pic.Sign_Position; -- may float.
312 Answer : Wide_Wide_String (1 .. Pic.Picture.Length);
314 Currency_Pos : Integer := Pic.Start_Currency;
316 Dollar : Boolean := False;
317 -- Overridden immediately if necessary
319 Zero : Boolean := True;
320 -- Set to False when a non-zero digit is output
324 -- If the picture has fewer decimal places than the number, the image
325 -- must be rounded according to the usual rules.
327 if Attrs.Has_Fraction then
329 R : constant Integer :=
330 (Attrs.End_Of_Fraction - Attrs.Start_Of_Fraction + 1)
331 - Pic.Max_Trailing_Digits;
336 R_Pos := Rounded'Length - R;
338 if Rounded (R_Pos + 1) > '4' then
340 if Rounded (R_Pos) = '.' then
344 if Rounded (R_Pos) /= '9' then
345 Rounded (R_Pos) := Character'Succ (Rounded (R_Pos));
347 Rounded (R_Pos) := '0';
351 if Rounded (R_Pos) = '.' then
355 if Rounded (R_Pos) /= '9' then
356 Rounded (R_Pos) := Character'Succ (Rounded (R_Pos));
359 Rounded (R_Pos) := '0';
364 -- The rounding may add a digit in front. Either the
365 -- leading blank or the sign (already captured) can be
369 Rounded (R_Pos) := '1';
370 Attrs.Start_Of_Int := Attrs.Start_Of_Int - 1;
378 for J in Answer'Range loop
379 Answer (J) := To_Wide (Pic.Picture.Expanded (J));
382 if Pic.Start_Currency /= Invalid_Position then
383 Dollar := Answer (Pic.Start_Currency) = '$';
386 -- Fix up "direct inserts" outside the playing field. Set up as one
387 -- loop to do the beginning, one (reverse) loop to do the end.
391 exit when Last = Pic.Start_Float;
392 exit when Last = Pic.Radix_Position;
393 exit when Answer (Last) = '9';
395 case Answer (Last) is
398 Answer (Last) := Separator_Character;
401 Answer (Last) := ' ';
408 exit when Last = Answer'Last;
413 -- Now for the end...
415 for J in reverse Last .. Answer'Last loop
416 exit when J = Pic.Radix_Position;
418 -- Do this test First, Separator_Character can equal Pic.Floater
420 if Answer (J) = Pic.Floater then
427 Answer (J) := Separator_Character;
443 if Pic.Start_Currency /= -1
444 and then Answer (Pic.Start_Currency) = '#'
445 and then Pic.Floater /= '#'
447 if Currency_Symbol'Length >
448 Pic.End_Currency - Pic.Start_Currency + 1
452 elsif Currency_Symbol'Length =
453 Pic.End_Currency - Pic.Start_Currency + 1
455 Answer (Pic.Start_Currency .. Pic.End_Currency) :=
458 elsif Pic.Radix_Position = Invalid_Position
459 or else Pic.Start_Currency < Pic.Radix_Position
461 Answer (Pic.Start_Currency .. Pic.End_Currency) :=
463 Answer (Pic.End_Currency - Currency_Symbol'Length + 1 ..
464 Pic.End_Currency) := Currency_Symbol;
467 Answer (Pic.Start_Currency .. Pic.End_Currency) :=
469 Answer (Pic.Start_Currency ..
470 Pic.Start_Currency + Currency_Symbol'Length - 1) :=
475 -- Fill in leading digits
477 if Attrs.End_Of_Int - Attrs.Start_Of_Int + 1 >
478 Pic.Max_Leading_Digits
483 if Pic.Radix_Position = Invalid_Position then
484 Position := Answer'Last;
486 Position := Pic.Radix_Position - 1;
489 for J in reverse Attrs.Start_Of_Int .. Attrs.End_Of_Int loop
491 while Answer (Position) /= '9'
492 and Answer (Position) /= Pic.Floater
494 if Answer (Position) = '_' then
495 Answer (Position) := Separator_Character;
497 elsif Answer (Position) = 'b' then
498 Answer (Position) := ' ';
501 Position := Position - 1;
504 Answer (Position) := To_Wide (Rounded (J));
506 if Rounded (J) /= '0' then
510 Position := Position - 1;
515 if Pic.Start_Float = Invalid_Position then
517 -- No leading floats, but need to change '9' to '0', '_' to
518 -- Separator_Character and 'b' to ' '.
520 for J in Last .. Position loop
522 -- Last set when fixing the "uninteresting" leaders above.
523 -- Don't duplicate the work.
525 if Answer (J) = '9' then
528 elsif Answer (J) = '_' then
529 Answer (J) := Separator_Character;
531 elsif Answer (J) = 'b' then
538 elsif Pic.Floater = '<'
544 for J in Pic.End_Float .. Position loop -- May be null range
545 if Answer (J) = '9' then
548 elsif Answer (J) = '_' then
549 Answer (J) := Separator_Character;
551 elsif Answer (J) = 'b' then
557 if Position > Pic.End_Float then
558 Position := Pic.End_Float;
561 for J in Pic.Start_Float .. Position - 1 loop
565 Answer (Position) := Pic.Floater;
566 Sign_Position := Position;
568 elsif Pic.Floater = '$' then
570 for J in Pic.End_Float .. Position loop -- May be null range
571 if Answer (J) = '9' then
574 elsif Answer (J) = '_' then
575 Answer (J) := ' '; -- no separator before leftmost digit
577 elsif Answer (J) = 'b' then
582 if Position > Pic.End_Float then
583 Position := Pic.End_Float;
586 for J in Pic.Start_Float .. Position - 1 loop
590 Answer (Position) := Pic.Floater;
591 Currency_Pos := Position;
593 elsif Pic.Floater = '*' then
595 for J in Pic.End_Float .. Position loop -- May be null range
596 if Answer (J) = '9' then
599 elsif Answer (J) = '_' then
600 Answer (J) := Separator_Character;
602 elsif Answer (J) = 'b' then
607 if Position > Pic.End_Float then
608 Position := Pic.End_Float;
611 for J in Pic.Start_Float .. Position loop
616 if Pic.Floater = '#' then
617 Currency_Pos := Currency_Symbol'Length;
620 for J in reverse Pic.Start_Float .. Position loop
624 Answer (J) := Fill_Character;
626 when 'Z' | 'b' | '/' | '0' =>
632 when '.' | 'V' | 'v' | '<' | '$' | '+' | '-' =>
636 if Currency_Pos = 0 then
639 Answer (J) := Currency_Symbol (Currency_Pos);
640 Currency_Pos := Currency_Pos - 1;
648 Answer (J) := Fill_Character;
654 if Currency_Pos = 0 then
658 Answer (J) := Currency_Symbol (Currency_Pos);
659 Currency_Pos := Currency_Pos - 1;
673 if Pic.Floater = '#' and then Currency_Pos /= 0 then
680 if Sign_Position = Invalid_Position then
681 if Attrs.Negative then
686 if Attrs.Negative then
687 case Answer (Sign_Position) is
688 when 'C' | 'D' | '-' =>
692 Answer (Sign_Position) := '-';
695 Answer (Sign_Position) := '(';
696 Answer (Pic.Second_Sign) := ')';
705 case Answer (Sign_Position) is
708 Answer (Sign_Position) := ' ';
710 when '<' | 'C' | 'D' =>
711 Answer (Sign_Position) := ' ';
712 Answer (Pic.Second_Sign) := ' ';
724 -- Fill in trailing digits
726 if Pic.Max_Trailing_Digits > 0 then
728 if Attrs.Has_Fraction then
729 Position := Attrs.Start_Of_Fraction;
730 Last := Pic.Radix_Position + 1;
732 for J in Last .. Answer'Last loop
734 if Answer (J) = '9' or Answer (J) = Pic.Floater then
735 Answer (J) := To_Wide (Rounded (Position));
737 if Rounded (Position) /= '0' then
741 Position := Position + 1;
744 -- Used up fraction but remember place in Answer
746 exit when Position > Attrs.End_Of_Fraction;
748 elsif Answer (J) = 'b' then
751 elsif Answer (J) = '_' then
752 Answer (J) := Separator_Character;
762 Position := Pic.Radix_Position + 1;
765 -- Now fill remaining 9's with zeros and _ with separators
769 for J in Position .. Last loop
770 if Answer (J) = '9' then
773 elsif Answer (J) = Pic.Floater then
776 elsif Answer (J) = '_' then
777 Answer (J) := Separator_Character;
779 elsif Answer (J) = 'b' then
785 Position := Last + 1;
788 if Pic.Floater = '#' and then Currency_Pos /= 0 then
792 -- No trailing digits, but now J may need to stick in a currency
795 if Pic.Start_Currency = Invalid_Position then
796 Position := Answer'Last + 1;
798 Position := Pic.Start_Currency;
802 for J in Position .. Answer'Last loop
804 if Pic.Start_Currency /= Invalid_Position and then
805 Answer (Pic.Start_Currency) = '#' then
809 -- Note: There are some weird cases J can imagine with 'b' or '#'
810 -- in currency strings where the following code will cause
811 -- glitches. The trick is to tell when the character in the
812 -- answer should be checked, and when to look at the original
813 -- string. Some other time. RIE 11/26/96 ???
817 Answer (J) := Fill_Character;
823 if Currency_Pos > Currency_Symbol'Length then
827 Answer (J) := Currency_Symbol (Currency_Pos);
828 Currency_Pos := Currency_Pos + 1;
836 Answer (J) := Fill_Character;
842 if Currency_Pos > Currency_Symbol'Length then
845 Answer (J) := Currency_Symbol (Currency_Pos);
846 Currency_Pos := Currency_Pos + 1;
860 -- Now get rid of Blank_when_Zero and complete Star fill
862 if Zero and Pic.Blank_When_Zero then
864 -- Value is zero, and blank it
869 Last := Last - 1 + Currency_Symbol'Length;
872 if Pic.Radix_Position /= Invalid_Position and then
873 Answer (Pic.Radix_Position) = 'V' then
877 return Wide_Wide_String'(1 .. Last => ' ');
879 elsif Zero and Pic.Star_Fill then
883 Last := Last - 1 + Currency_Symbol'Length;
886 if Pic.Radix_Position /= Invalid_Position then
888 if Answer (Pic.Radix_Position) = 'V' then
892 if Pic.Radix_Position > Pic.Start_Currency then
894 Wide_Wide_String'(1 .. Pic.Radix_Position - 1 => '*') &
896 Wide_Wide_String'(Pic.Radix_Position + 1 .. Last => '*');
902 Pic.Radix_Position + Currency_Symbol'Length - 2
906 (Pic.Radix_Position + Currency_Symbol'Length .. Last
912 Wide_Wide_String'(1 .. Pic.Radix_Position - 1 => '*') &
914 Wide_Wide_String'(Pic.Radix_Position + 1 .. Last => '*');
918 return Wide_Wide_String'(1 .. Last => '*');
921 -- This was once a simple return statement, now there are nine
922 -- different return cases. Not to mention the five above to deal
923 -- with zeros. Why not split things out?
925 -- Processing the radix and sign expansion separately
926 -- would require lots of copying--the string and some of its
927 -- indicies--without really simplifying the logic. The cases are:
929 -- 1) Expand $, replace '.' with Radix_Point
930 -- 2) No currency expansion, replace '.' with Radix_Point
931 -- 3) Expand $, radix blanked
932 -- 4) No currency expansion, radix blanked
934 -- 6) Expand $, Elide V
935 -- 7) Elide V, Expand $ (Two cases depending on order.)
936 -- 8) No radix, expand $
937 -- 9) No radix, no currency expansion
939 if Pic.Radix_Position /= Invalid_Position then
941 if Answer (Pic.Radix_Position) = '.' then
942 Answer (Pic.Radix_Position) := Radix_Point;
946 -- 1) Expand $, replace '.' with Radix_Point
948 return Answer (1 .. Currency_Pos - 1) & Currency_Symbol &
949 Answer (Currency_Pos + 1 .. Answer'Last);
952 -- 2) No currency expansion, replace '.' with Radix_Point
957 elsif Answer (Pic.Radix_Position) = ' ' then -- blanked radix.
960 -- 3) Expand $, radix blanked
962 return Answer (1 .. Currency_Pos - 1) & Currency_Symbol &
963 Answer (Currency_Pos + 1 .. Answer'Last);
966 -- 4) No expansion, radix blanked
978 return Answer (1 .. Pic.Radix_Position - 1) &
979 Answer (Pic.Radix_Position + 1 .. Answer'Last);
981 elsif Currency_Pos < Pic.Radix_Position then
983 -- 6) Expand $, Elide V
985 return Answer (1 .. Currency_Pos - 1) & Currency_Symbol &
986 Answer (Currency_Pos + 1 .. Pic.Radix_Position - 1) &
987 Answer (Pic.Radix_Position + 1 .. Answer'Last);
990 -- 7) Elide V, Expand $
992 return Answer (1 .. Pic.Radix_Position - 1) &
993 Answer (Pic.Radix_Position + 1 .. Currency_Pos - 1) &
995 Answer (Currency_Pos + 1 .. Answer'Last);
1001 -- 8) No radix, expand $
1003 return Answer (1 .. Currency_Pos - 1) & Currency_Symbol &
1004 Answer (Currency_Pos + 1 .. Answer'Last);
1007 -- 9) No radix, no currency expansion
1013 -------------------------
1014 -- Parse_Number_String --
1015 -------------------------
1017 function Parse_Number_String (Str : String) return Number_Attributes is
1018 Answer : Number_Attributes;
1021 for J in Str'Range loop
1029 -- Decide if this is the start of a number.
1030 -- If so, figure out which one...
1032 if Answer.Has_Fraction then
1033 Answer.End_Of_Fraction := J;
1035 if Answer.Start_Of_Int = Invalid_Position then
1037 Answer.Start_Of_Int := J;
1039 Answer.End_Of_Int := J;
1044 -- Only count a zero before the decimal point if it follows a
1045 -- non-zero digit. After the decimal point, zeros will be
1046 -- counted if followed by a non-zero digit.
1048 if not Answer.Has_Fraction then
1049 if Answer.Start_Of_Int /= Invalid_Position then
1050 Answer.End_Of_Int := J;
1058 Answer.Negative := True;
1062 -- Close integer, start fraction
1064 if Answer.Has_Fraction then
1065 raise Picture_Error;
1068 -- Two decimal points is a no-no
1070 Answer.Has_Fraction := True;
1071 Answer.End_Of_Fraction := J;
1073 -- Could leave this at Invalid_Position, but this seems the
1074 -- right way to indicate a null range...
1076 Answer.Start_Of_Fraction := J + 1;
1077 Answer.End_Of_Int := J - 1;
1080 raise Picture_Error; -- can this happen? probably not!
1084 if Answer.Start_Of_Int = Invalid_Position then
1085 Answer.Start_Of_Int := Answer.End_Of_Int + 1;
1088 -- No significant (intger) digits needs a null range
1091 end Parse_Number_String;
1097 -- The following ensures that we return B and not b being careful not
1098 -- to break things which expect lower case b for blank. See CXF3A02.
1100 function Pic_String (Pic : Picture) return String is
1101 Temp : String (1 .. Pic.Contents.Picture.Length) :=
1102 Pic.Contents.Picture.Expanded;
1104 for J in Temp'Range loop
1105 if Temp (J) = 'b' then Temp (J) := 'B'; end if;
1115 procedure Precalculate (Pic : in out Format_Record) is
1117 Computed_BWZ : Boolean := True;
1119 type Legality is (Okay, Reject);
1120 State : Legality := Reject;
1121 -- Start in reject, which will reject null strings
1123 Index : Pic_Index := Pic.Picture.Expanded'First;
1125 function At_End return Boolean;
1126 pragma Inline (At_End);
1128 procedure Set_State (L : Legality);
1129 pragma Inline (Set_State);
1131 function Look return Character;
1132 pragma Inline (Look);
1134 function Is_Insert return Boolean;
1135 pragma Inline (Is_Insert);
1138 pragma Inline (Skip);
1140 procedure Trailing_Currency;
1141 procedure Trailing_Bracket;
1142 procedure Number_Fraction;
1143 procedure Number_Completion;
1144 procedure Number_Fraction_Or_Bracket;
1145 procedure Number_Fraction_Or_Z_Fill;
1146 procedure Zero_Suppression;
1147 procedure Floating_Bracket;
1148 procedure Number_Fraction_Or_Star_Fill;
1149 procedure Star_Suppression;
1150 procedure Number_Fraction_Or_Dollar;
1151 procedure Leading_Dollar;
1152 procedure Number_Fraction_Or_Pound;
1153 procedure Leading_Pound;
1155 procedure Floating_Plus;
1156 procedure Floating_Minus;
1157 procedure Picture_Plus;
1158 procedure Picture_Minus;
1159 procedure Picture_Bracket;
1161 procedure Optional_RHS_Sign;
1162 procedure Picture_String;
1168 function At_End return Boolean is
1170 return Index > Pic.Picture.Length;
1173 ----------------------
1174 -- Floating_Bracket --
1175 ----------------------
1177 -- Note that Floating_Bracket is only called with an acceptable
1178 -- prefix. But we don't set Okay, because we must end with a '>'.
1180 procedure Floating_Bracket is
1183 Pic.End_Float := Index;
1184 Pic.Max_Leading_Digits := Pic.Max_Leading_Digits + 1;
1186 -- First bracket wasn't counted...
1197 when '_' | '0' | '/' =>
1198 Pic.End_Float := Index;
1202 Pic.End_Float := Index;
1203 Pic.Picture.Expanded (Index) := 'b';
1207 Pic.End_Float := Index;
1208 Pic.Max_Leading_Digits := Pic.Max_Leading_Digits + 1;
1220 when 'V' | 'v' | '.' =>
1221 Pic.Radix_Position := Index;
1223 Number_Fraction_Or_Bracket;
1230 end Floating_Bracket;
1232 --------------------
1233 -- Floating_Minus --
1234 --------------------
1236 procedure Floating_Minus is
1244 when '_' | '0' | '/' =>
1245 Pic.End_Float := Index;
1249 Pic.End_Float := Index;
1250 Pic.Picture.Expanded (Index) := 'b';
1254 Pic.Max_Leading_Digits := Pic.Max_Leading_Digits + 1;
1255 Pic.End_Float := Index;
1262 when '.' | 'V' | 'v' =>
1263 Pic.Radix_Position := Index;
1266 while Is_Insert loop
1283 Pic.Max_Trailing_Digits :=
1284 Pic.Max_Trailing_Digits + 1;
1285 Pic.End_Float := Index;
1288 when '_' | '0' | '/' =>
1292 Pic.Picture.Expanded (Index) := 'b';
1317 procedure Floating_Plus is
1325 when '_' | '0' | '/' =>
1326 Pic.End_Float := Index;
1330 Pic.End_Float := Index;
1331 Pic.Picture.Expanded (Index) := 'b';
1335 Pic.Max_Leading_Digits := Pic.Max_Leading_Digits + 1;
1336 Pic.End_Float := Index;
1343 when '.' | 'V' | 'v' =>
1344 Pic.Radix_Position := Index;
1347 while Is_Insert loop
1364 Pic.Max_Trailing_Digits :=
1365 Pic.Max_Trailing_Digits + 1;
1366 Pic.End_Float := Index;
1369 when '_' | '0' | '/' =>
1373 Pic.Picture.Expanded (Index) := 'b';
1399 function Is_Insert return Boolean is
1405 case Pic.Picture.Expanded (Index) is
1407 when '_' | '0' | '/' => return True;
1410 Pic.Picture.Expanded (Index) := 'b'; -- canonical
1413 when others => return False;
1417 --------------------
1418 -- Leading_Dollar --
1419 --------------------
1421 -- Note that Leading_Dollar can be called in either State. It will set
1422 -- state to Okay only if a 9 or (second) is encountered.
1424 -- Also notice the tricky bit with State and Zero_Suppression.
1425 -- Zero_Suppression is Picture_Error if a '$' or a '9' has been
1426 -- encountered, exactly the cases where State has been set.
1428 procedure Leading_Dollar is
1430 -- Treat as a floating dollar, and unwind otherwise
1433 Pic.Start_Currency := Index;
1434 Pic.End_Currency := Index;
1435 Pic.Start_Float := Index;
1436 Pic.End_Float := Index;
1438 -- Don't increment Pic.Max_Leading_Digits, we need one "real"
1450 when '_' | '0' | '/' =>
1451 Pic.End_Float := Index;
1454 -- A trailing insertion character is not part of the
1455 -- floating currency, so need to look ahead.
1458 Pic.End_Float := Pic.End_Float - 1;
1462 Pic.End_Float := Index;
1463 Pic.Picture.Expanded (Index) := 'b';
1467 Pic.Picture.Expanded (Index) := 'Z'; -- consistency
1469 if State = Okay then
1470 raise Picture_Error;
1472 -- Will overwrite Floater and Start_Float
1478 if State = Okay then
1479 raise Picture_Error;
1481 -- Will overwrite Floater and Start_Float
1487 Pic.Max_Leading_Digits := Pic.Max_Leading_Digits + 1;
1488 Pic.End_Float := Index;
1489 Pic.End_Currency := Index;
1490 Set_State (Okay); Skip;
1493 if State /= Okay then
1495 Pic.Start_Float := Invalid_Position;
1496 Pic.End_Float := Invalid_Position;
1499 -- A single dollar does not a floating make
1504 when 'V' | 'v' | '.' =>
1505 if State /= Okay then
1507 Pic.Start_Float := Invalid_Position;
1508 Pic.End_Float := Invalid_Position;
1511 -- Only one dollar before the sign is okay, but doesn't
1514 Pic.Radix_Position := Index;
1516 Number_Fraction_Or_Dollar;
1530 -- This one is complex! A Leading_Pound can be fixed or floating,
1531 -- but in some cases the decision has to be deferred until we leave
1532 -- this procedure. Also note that Leading_Pound can be called in
1535 -- It will set state to Okay only if a 9 or (second) # is encountered
1537 -- One Last note: In ambiguous cases, the currency is treated as
1538 -- floating unless there is only one '#'.
1540 procedure Leading_Pound is
1542 Inserts : Boolean := False;
1543 -- Set to True if a '_', '0', '/', 'B', or 'b' is encountered
1545 Must_Float : Boolean := False;
1546 -- Set to true if a '#' occurs after an insert
1549 -- Treat as a floating currency. If it isn't, this will be
1550 -- overwritten later.
1554 Pic.Start_Currency := Index;
1555 Pic.End_Currency := Index;
1556 Pic.Start_Float := Index;
1557 Pic.End_Float := Index;
1559 -- Don't increment Pic.Max_Leading_Digits, we need one "real"
1562 Pic.Max_Currency_Digits := 1; -- we've seen one.
1573 when '_' | '0' | '/' =>
1574 Pic.End_Float := Index;
1579 Pic.Picture.Expanded (Index) := 'b';
1580 Pic.End_Float := Index;
1585 Pic.Picture.Expanded (Index) := 'Z'; -- consistency
1588 raise Picture_Error;
1590 Pic.Max_Leading_Digits := 0;
1592 -- Will overwrite Floater and Start_Float
1599 raise Picture_Error;
1601 Pic.Max_Leading_Digits := 0;
1603 -- Will overwrite Floater and Start_Float
1613 Pic.Max_Leading_Digits := Pic.Max_Leading_Digits + 1;
1614 Pic.End_Float := Index;
1615 Pic.End_Currency := Index;
1620 if State /= Okay then
1622 -- A single '#' doesn't float
1625 Pic.Start_Float := Invalid_Position;
1626 Pic.End_Float := Invalid_Position;
1632 when 'V' | 'v' | '.' =>
1633 if State /= Okay then
1635 Pic.Start_Float := Invalid_Position;
1636 Pic.End_Float := Invalid_Position;
1639 -- Only one pound before the sign is okay, but doesn't
1642 Pic.Radix_Position := Index;
1644 Number_Fraction_Or_Pound;
1657 function Look return Character is
1660 raise Picture_Error;
1663 return Pic.Picture.Expanded (Index);
1675 when '_' | '0' | '/' =>
1679 Pic.Picture.Expanded (Index) := 'b';
1683 Computed_BWZ := False;
1684 Pic.Max_Leading_Digits := Pic.Max_Leading_Digits + 1;
1688 when '.' | 'V' | 'v' =>
1689 Pic.Radix_Position := Index;
1703 -- Will return in Okay state if a '9' was seen
1708 -----------------------
1709 -- Number_Completion --
1710 -----------------------
1712 procedure Number_Completion is
1714 while not At_End loop
1717 when '_' | '0' | '/' =>
1721 Pic.Picture.Expanded (Index) := 'b';
1725 Computed_BWZ := False;
1726 Pic.Max_Leading_Digits := Pic.Max_Leading_Digits + 1;
1730 when 'V' | 'v' | '.' =>
1731 Pic.Radix_Position := Index;
1740 end Number_Completion;
1742 ---------------------
1743 -- Number_Fraction --
1744 ---------------------
1746 procedure Number_Fraction is
1748 -- Note that number fraction can be called in either State.
1749 -- It will set state to Valid only if a 9 is encountered.
1757 when '_' | '0' | '/' =>
1761 Pic.Picture.Expanded (Index) := 'b';
1765 Computed_BWZ := False;
1766 Pic.Max_Trailing_Digits := Pic.Max_Trailing_Digits + 1;
1767 Set_State (Okay); Skip;
1773 end Number_Fraction;
1775 --------------------------------
1776 -- Number_Fraction_Or_Bracket --
1777 --------------------------------
1779 procedure Number_Fraction_Or_Bracket is
1788 when '_' | '0' | '/' => Skip;
1791 Pic.Picture.Expanded (Index) := 'b';
1795 Pic.Max_Trailing_Digits := Pic.Max_Trailing_Digits + 1;
1796 Pic.End_Float := Index;
1805 when '_' | '0' | '/' =>
1809 Pic.Picture.Expanded (Index) := 'b';
1813 Pic.Max_Trailing_Digits :=
1814 Pic.Max_Trailing_Digits + 1;
1815 Pic.End_Float := Index;
1828 end Number_Fraction_Or_Bracket;
1830 -------------------------------
1831 -- Number_Fraction_Or_Dollar --
1832 -------------------------------
1834 procedure Number_Fraction_Or_Dollar is
1842 when '_' | '0' | '/' =>
1846 Pic.Picture.Expanded (Index) := 'b';
1850 Pic.Max_Trailing_Digits := Pic.Max_Trailing_Digits + 1;
1851 Pic.End_Float := Index;
1860 when '_' | '0' | '/' =>
1864 Pic.Picture.Expanded (Index) := 'b';
1868 Pic.Max_Trailing_Digits :=
1869 Pic.Max_Trailing_Digits + 1;
1870 Pic.End_Float := Index;
1883 end Number_Fraction_Or_Dollar;
1885 ------------------------------
1886 -- Number_Fraction_Or_Pound --
1887 ------------------------------
1889 procedure Number_Fraction_Or_Pound is
1898 when '_' | '0' | '/' =>
1902 Pic.Picture.Expanded (Index) := 'b';
1906 Pic.Max_Trailing_Digits := Pic.Max_Trailing_Digits + 1;
1907 Pic.End_Float := Index;
1917 when '_' | '0' | '/' =>
1921 Pic.Picture.Expanded (Index) := 'b';
1925 Pic.Max_Trailing_Digits :=
1926 Pic.Max_Trailing_Digits + 1;
1927 Pic.End_Float := Index;
1942 end Number_Fraction_Or_Pound;
1944 ----------------------------------
1945 -- Number_Fraction_Or_Star_Fill --
1946 ----------------------------------
1948 procedure Number_Fraction_Or_Star_Fill is
1957 when '_' | '0' | '/' =>
1961 Pic.Picture.Expanded (Index) := 'b';
1965 Pic.Star_Fill := True;
1966 Pic.Max_Trailing_Digits := Pic.Max_Trailing_Digits + 1;
1967 Pic.End_Float := Index;
1977 when '_' | '0' | '/' =>
1981 Pic.Picture.Expanded (Index) := 'b';
1985 Pic.Star_Fill := True;
1986 Pic.Max_Trailing_Digits :=
1987 Pic.Max_Trailing_Digits + 1;
1988 Pic.End_Float := Index;
2002 end Number_Fraction_Or_Star_Fill;
2004 -------------------------------
2005 -- Number_Fraction_Or_Z_Fill --
2006 -------------------------------
2008 procedure Number_Fraction_Or_Z_Fill is
2017 when '_' | '0' | '/' =>
2021 Pic.Picture.Expanded (Index) := 'b';
2025 Pic.Max_Trailing_Digits := Pic.Max_Trailing_Digits + 1;
2026 Pic.End_Float := Index;
2027 Pic.Picture.Expanded (Index) := 'Z'; -- consistency
2038 when '_' | '0' | '/' =>
2042 Pic.Picture.Expanded (Index) := 'b';
2046 Pic.Picture.Expanded (Index) := 'Z'; -- consistency
2048 Pic.Max_Trailing_Digits :=
2049 Pic.Max_Trailing_Digits + 1;
2050 Pic.End_Float := Index;
2063 end Number_Fraction_Or_Z_Fill;
2065 -----------------------
2066 -- Optional_RHS_Sign --
2067 -----------------------
2069 procedure Optional_RHS_Sign is
2078 Pic.Sign_Position := Index;
2083 Pic.Sign_Position := Index;
2084 Pic.Picture.Expanded (Index) := 'C';
2087 if Look = 'R' or Look = 'r' then
2088 Pic.Second_Sign := Index;
2089 Pic.Picture.Expanded (Index) := 'R';
2093 raise Picture_Error;
2099 Pic.Sign_Position := Index;
2100 Pic.Picture.Expanded (Index) := 'D';
2103 if Look = 'B' or Look = 'b' then
2104 Pic.Second_Sign := Index;
2105 Pic.Picture.Expanded (Index) := 'B';
2109 raise Picture_Error;
2115 if Pic.Picture.Expanded (Pic.Sign_Position) = '<' then
2116 Pic.Second_Sign := Index;
2120 raise Picture_Error;
2127 end Optional_RHS_Sign;
2133 -- Note that Picture can be called in either State
2135 -- It will set state to Valid only if a 9 is encountered or floating
2136 -- currency is called.
2138 procedure Picture is
2147 when '_' | '0' | '/' =>
2151 Pic.Picture.Expanded (Index) := 'b';
2163 Computed_BWZ := False;
2165 Pic.Max_Leading_Digits := Pic.Max_Leading_Digits + 1;
2168 when 'V' | 'v' | '.' =>
2169 Pic.Radix_Position := Index;
2182 ---------------------
2183 -- Picture_Bracket --
2184 ---------------------
2186 procedure Picture_Bracket is
2188 Pic.Sign_Position := Index;
2189 Pic.Sign_Position := Index;
2191 -- Treat as a floating sign, and unwind otherwise
2194 Pic.Start_Float := Index;
2195 Pic.End_Float := Index;
2197 -- Don't increment Pic.Max_Leading_Digits, we need one "real"
2200 Skip; -- Known Bracket
2205 when '_' | '0' | '/' =>
2206 Pic.End_Float := Index;
2210 Pic.End_Float := Index;
2211 Pic.Picture.Expanded (Index) := 'b';
2215 Set_State (Okay); -- "<<>" is enough.
2221 when '$' | '#' | '9' | '*' =>
2222 if State /= Okay then
2224 Pic.Start_Float := Invalid_Position;
2225 Pic.End_Float := Invalid_Position;
2233 when '.' | 'V' | 'v' =>
2234 if State /= Okay then
2236 Pic.Start_Float := Invalid_Position;
2237 Pic.End_Float := Invalid_Position;
2240 -- Don't assume that state is okay, haven't seen a digit
2247 raise Picture_Error;
2251 end Picture_Bracket;
2257 procedure Picture_Minus is
2259 Pic.Sign_Position := Index;
2261 -- Treat as a floating sign, and unwind otherwise
2264 Pic.Start_Float := Index;
2265 Pic.End_Float := Index;
2267 -- Don't increment Pic.Max_Leading_Digits, we need one "real"
2270 Skip; -- Known Minus
2275 when '_' | '0' | '/' =>
2276 Pic.End_Float := Index;
2280 Pic.End_Float := Index;
2281 Pic.Picture.Expanded (Index) := 'b';
2285 Pic.Max_Leading_Digits := Pic.Max_Leading_Digits + 1;
2286 Pic.End_Float := Index;
2288 Set_State (Okay); -- "-- " is enough.
2293 when '$' | '#' | '9' | '*' =>
2294 if State /= Okay then
2296 Pic.Start_Float := Invalid_Position;
2297 Pic.End_Float := Invalid_Position;
2306 -- Can't have Z and a floating sign
2308 if State = Okay then
2312 Pic.Picture.Expanded (Index) := 'Z'; -- consistency
2318 when '.' | 'V' | 'v' =>
2319 if State /= Okay then
2321 Pic.Start_Float := Invalid_Position;
2322 Pic.End_Float := Invalid_Position;
2325 -- Don't assume that state is okay, haven't seen a digit
2341 procedure Picture_Plus is
2343 Pic.Sign_Position := Index;
2345 -- Treat as a floating sign, and unwind otherwise
2348 Pic.Start_Float := Index;
2349 Pic.End_Float := Index;
2351 -- Don't increment Pic.Max_Leading_Digits, we need one "real"
2359 when '_' | '0' | '/' =>
2360 Pic.End_Float := Index;
2364 Pic.End_Float := Index;
2365 Pic.Picture.Expanded (Index) := 'b';
2369 Pic.Max_Leading_Digits := Pic.Max_Leading_Digits + 1;
2370 Pic.End_Float := Index;
2372 Set_State (Okay); -- "++" is enough
2377 when '$' | '#' | '9' | '*' =>
2378 if State /= Okay then
2380 Pic.Start_Float := Invalid_Position;
2381 Pic.End_Float := Invalid_Position;
2389 if State = Okay then
2393 -- Can't have Z and a floating sign
2395 Pic.Picture.Expanded (Index) := 'Z'; -- consistency
2397 -- '+Z' is acceptable
2406 when '.' | 'V' | 'v' =>
2407 if State /= Okay then
2409 Pic.Start_Float := Invalid_Position;
2410 Pic.End_Float := Invalid_Position;
2413 -- Don't assume that state is okay, haven't seen a digit
2425 --------------------
2426 -- Picture_String --
2427 --------------------
2429 procedure Picture_String is
2431 while Is_Insert loop
2451 Pic.Picture.Expanded (Index) := 'Z'; -- consistency
2461 when '9' | '.' | 'V' | 'v' =>
2467 raise Picture_Error;
2471 -- Blank when zero either if the PIC does not contain a '9' or if
2472 -- requested by the user and no '*'
2474 Pic.Blank_When_Zero :=
2475 (Computed_BWZ or Pic.Blank_When_Zero) and not Pic.Star_Fill;
2477 -- Star fill if '*' and no '9'
2479 Pic.Star_Fill := Pic.Star_Fill and Computed_BWZ;
2491 procedure Set_State (L : Legality) is
2505 ----------------------
2506 -- Star_Suppression --
2507 ----------------------
2509 procedure Star_Suppression is
2512 Pic.Start_Float := Index;
2513 Pic.End_Float := Index;
2514 Pic.Max_Leading_Digits := Pic.Max_Leading_Digits + 1;
2517 -- Even a single * is a valid picture
2519 Pic.Star_Fill := True;
2529 when '_' | '0' | '/' =>
2530 Pic.End_Float := Index;
2534 Pic.End_Float := Index;
2535 Pic.Picture.Expanded (Index) := 'b';
2539 Pic.End_Float := Index;
2540 Pic.Max_Leading_Digits := Pic.Max_Leading_Digits + 1;
2541 Set_State (Okay); Skip;
2548 when '.' | 'V' | 'v' =>
2549 Pic.Radix_Position := Index;
2551 Number_Fraction_Or_Star_Fill;
2559 when others => raise Picture_Error;
2562 end Star_Suppression;
2564 ----------------------
2565 -- Trailing_Bracket --
2566 ----------------------
2568 procedure Trailing_Bracket is
2571 Pic.Second_Sign := Index;
2574 raise Picture_Error;
2576 end Trailing_Bracket;
2578 -----------------------
2579 -- Trailing_Currency --
2580 -----------------------
2582 procedure Trailing_Currency is
2589 Pic.Start_Currency := Index;
2590 Pic.End_Currency := Index;
2594 while not At_End and then Look = '#' loop
2595 if Pic.Start_Currency = Invalid_Position then
2596 Pic.Start_Currency := Index;
2599 Pic.End_Currency := Index;
2610 when '_' | '0' | '/' => Skip;
2613 Pic.Picture.Expanded (Index) := 'b';
2616 when others => return;
2619 end Trailing_Currency;
2621 ----------------------
2622 -- Zero_Suppression --
2623 ----------------------
2625 procedure Zero_Suppression is
2628 Pic.Start_Float := Index;
2629 Pic.End_Float := Index;
2630 Pic.Max_Leading_Digits := Pic.Max_Leading_Digits + 1;
2631 Pic.Picture.Expanded (Index) := 'Z'; -- consistency
2636 -- Even a single Z is a valid picture
2644 when '_' | '0' | '/' =>
2645 Pic.End_Float := Index;
2649 Pic.End_Float := Index;
2650 Pic.Picture.Expanded (Index) := 'b';
2654 Pic.Picture.Expanded (Index) := 'Z'; -- consistency
2656 Pic.Max_Leading_Digits := Pic.Max_Leading_Digits + 1;
2657 Pic.End_Float := Index;
2666 when '.' | 'V' | 'v' =>
2667 Pic.Radix_Position := Index;
2669 Number_Fraction_Or_Z_Fill;
2681 end Zero_Suppression;
2683 -- Start of processing for Precalculate
2688 if State = Reject then
2689 raise Picture_Error;
2694 when Constraint_Error =>
2696 -- To deal with special cases like null strings
2698 raise Picture_Error;
2707 (Pic_String : String;
2708 Blank_When_Zero : Boolean := False) return Picture
2714 Item : constant String := Expand (Pic_String);
2717 Result.Contents.Picture := (Item'Length, Item);
2718 Result.Contents.Original_BWZ := Blank_When_Zero;
2719 Result.Contents.Blank_When_Zero := Blank_When_Zero;
2720 Precalculate (Result.Contents);
2726 raise Picture_Error;
2734 function To_Wide (C : Character) return Wide_Wide_Character is
2736 return Wide_Wide_Character'Val (Character'Pos (C));
2744 (Pic_String : String;
2745 Blank_When_Zero : Boolean := False) return Boolean
2749 Expanded_Pic : constant String := Expand (Pic_String);
2750 -- Raises Picture_Error if Item not well-formed
2752 Format_Rec : Format_Record;
2755 Format_Rec.Picture := (Expanded_Pic'Length, Expanded_Pic);
2756 Format_Rec.Blank_When_Zero := Blank_When_Zero;
2757 Format_Rec.Original_BWZ := Blank_When_Zero;
2758 Precalculate (Format_Rec);
2760 -- False only if Blank_When_0 is True but the pic string has a '*'
2762 return not Blank_When_Zero
2763 or else Strings_Fixed.Index (Expanded_Pic, "*") = 0;
2767 when others => return False;
2770 end Ada.Wide_Wide_Text_IO.Editing;