1 ------------------------------------------------------------------------------
3 -- GNAT RUN-TIME COMPONENTS --
5 -- A D A . W I D E _ T E X T _ I O . E D I T I N G --
11 -- Copyright (C) 1992-2001 Free Software Foundation, Inc. --
13 -- GNAT is free software; you can redistribute it and/or modify it under --
14 -- terms of the GNU General Public License as published by the Free Soft- --
15 -- ware Foundation; either version 2, or (at your option) any later ver- --
16 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
17 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
18 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
19 -- for more details. You should have received a copy of the GNU General --
20 -- Public License distributed with GNAT; see file COPYING. If not, write --
21 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
22 -- MA 02111-1307, USA. --
24 -- As a special exception, if other files instantiate generics from this --
25 -- unit, or you link this unit with other files to produce an executable, --
26 -- this unit does not by itself cause the resulting executable to be --
27 -- covered by the GNU General Public License. This exception does not --
28 -- however invalidate any other reasons why the executable file might be --
29 -- covered by the GNU Public License. --
31 -- GNAT was originally developed by the GNAT team at New York University. --
32 -- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
34 ------------------------------------------------------------------------------
36 with Ada.Strings.Fixed;
37 with Ada.Strings.Wide_Fixed;
39 package body Ada.Wide_Text_IO.Editing is
41 package Strings renames Ada.Strings;
42 package Strings_Fixed renames Ada.Strings.Fixed;
43 package Strings_Wide_Fixed renames Ada.Strings.Wide_Fixed;
44 package Wide_Text_IO renames Ada.Wide_Text_IO;
46 -----------------------
47 -- Local_Subprograms --
48 -----------------------
50 function To_Wide (C : Character) return Wide_Character;
51 pragma Inline (To_Wide);
52 -- Convert Character to corresponding Wide_Character
58 function Blank_When_Zero (Pic : in Picture) return Boolean is
60 return Pic.Contents.Original_BWZ;
67 package body Decimal_Output is
76 Currency : in Wide_String := Default_Currency;
77 Fill : in Wide_Character := Default_Fill;
78 Separator : in Wide_Character := Default_Separator;
79 Radix_Mark : in Wide_Character := Default_Radix_Mark)
84 (Pic.Contents, Num'Image (Item),
85 Currency, Fill, Separator, Radix_Mark);
94 Currency : in Wide_String := Default_Currency)
97 Picstr : constant String := Pic_String (Pic);
98 V_Adjust : Integer := 0;
99 Cur_Adjust : Integer := 0;
102 -- Check if Picstr has 'V' or '$'
104 -- If 'V', then length is 1 less than otherwise
106 -- If '$', then length is Currency'Length-1 more than otherwise
108 -- This should use the string handling package ???
110 for J in Picstr'Range loop
111 if Picstr (J) = 'V' then
114 elsif Picstr (J) = '$' then
115 Cur_Adjust := Currency'Length - 1;
119 return Picstr'Length - V_Adjust + Cur_Adjust;
127 (File : in Wide_Text_IO.File_Type;
130 Currency : in Wide_String := Default_Currency;
131 Fill : in Wide_Character := Default_Fill;
132 Separator : in Wide_Character := Default_Separator;
133 Radix_Mark : in Wide_Character := Default_Radix_Mark)
136 Wide_Text_IO.Put (File, Image (Item, Pic,
137 Currency, Fill, Separator, Radix_Mark));
143 Currency : in Wide_String := Default_Currency;
144 Fill : in Wide_Character := Default_Fill;
145 Separator : in Wide_Character := Default_Separator;
146 Radix_Mark : in Wide_Character := Default_Radix_Mark)
149 Wide_Text_IO.Put (Image (Item, Pic,
150 Currency, Fill, Separator, Radix_Mark));
154 (To : out Wide_String;
157 Currency : in Wide_String := Default_Currency;
158 Fill : in Wide_Character := Default_Fill;
159 Separator : in Wide_Character := Default_Separator;
160 Radix_Mark : in Wide_Character := Default_Radix_Mark)
162 Result : constant Wide_String :=
163 Image (Item, Pic, Currency, Fill, Separator, Radix_Mark);
166 if Result'Length > To'Length then
167 raise Wide_Text_IO.Layout_Error;
169 Strings_Wide_Fixed.Move (Source => Result, Target => To,
170 Justify => Strings.Right);
181 Currency : in Wide_String := Default_Currency)
186 Temp : constant Wide_String := Image (Item, Pic, Currency);
187 pragma Warnings (Off, Temp);
194 when Layout_Error => return False;
204 function Expand (Picture : in String) return String is
205 Result : String (1 .. MAX_PICSIZE);
206 Picture_Index : Integer := Picture'First;
207 Result_Index : Integer := Result'First;
212 if Picture'Length < 1 then
216 if Picture (Picture'First) = '(' then
221 case Picture (Picture_Index) is
225 -- We now need to scan out the count after a left paren.
226 -- In the non-wide version we used Integer_IO.Get, but
227 -- that is not convenient here, since we don't want to
228 -- drag in normal Text_IO just for this purpose. So we
229 -- do the scan ourselves, with the normal validity checks.
231 Last := Picture_Index + 1;
234 if Picture (Last) not in '0' .. '9' then
238 Count := Character'Pos (Picture (Last)) - Character'Pos ('0');
242 if Last > Picture'Last then
246 if Picture (Last) = '_' then
247 if Picture (Last - 1) = '_' then
251 elsif Picture (Last) = ')' then
254 elsif Picture (Last) not in '0' .. '9' then
259 + Character'Pos (Picture (Last)) -
266 -- In what follows note that one copy of the repeated
267 -- character has already been made, so a count of one is a
268 -- no-op, and a count of zero erases a character.
270 for J in 2 .. Count loop
271 Result (Result_Index + J - 2) := Picture (Picture_Index - 1);
274 Result_Index := Result_Index + Count - 1;
276 -- Last was a ')' throw it away too.
278 Picture_Index := Last + 1;
284 Result (Result_Index) := Picture (Picture_Index);
285 Picture_Index := Picture_Index + 1;
286 Result_Index := Result_Index + 1;
290 exit when Picture_Index > Picture'Last;
293 return Result (1 .. Result_Index - 1);
305 function Format_Number
306 (Pic : Format_Record;
308 Currency_Symbol : Wide_String;
309 Fill_Character : Wide_Character;
310 Separator_Character : Wide_Character;
311 Radix_Point : Wide_Character)
314 Attrs : Number_Attributes := Parse_Number_String (Number);
316 Rounded : String := Number;
318 Sign_Position : Integer := Pic.Sign_Position; -- may float.
320 Answer : Wide_String (1 .. Pic.Picture.Length);
322 Currency_Pos : Integer := Pic.Start_Currency;
324 Dollar : Boolean := False;
325 -- Overridden immediately if necessary.
327 Zero : Boolean := True;
328 -- Set to False when a non-zero digit is output.
332 -- If the picture has fewer decimal places than the number, the image
333 -- must be rounded according to the usual rules.
335 if Attrs.Has_Fraction then
337 R : constant Integer :=
338 (Attrs.End_Of_Fraction - Attrs.Start_Of_Fraction + 1)
339 - Pic.Max_Trailing_Digits;
344 R_Pos := Rounded'Length - R;
346 if Rounded (R_Pos + 1) > '4' then
348 if Rounded (R_Pos) = '.' then
352 if Rounded (R_Pos) /= '9' then
353 Rounded (R_Pos) := Character'Succ (Rounded (R_Pos));
355 Rounded (R_Pos) := '0';
359 if Rounded (R_Pos) = '.' then
363 if Rounded (R_Pos) /= '9' then
364 Rounded (R_Pos) := Character'Succ (Rounded (R_Pos));
367 Rounded (R_Pos) := '0';
372 -- The rounding may add a digit in front. Either the
373 -- leading blank or the sign (already captured) can
377 Rounded (R_Pos) := '1';
378 Attrs.Start_Of_Int := Attrs.Start_Of_Int - 1;
386 for J in Answer'Range loop
387 Answer (J) := To_Wide (Pic.Picture.Expanded (J));
390 if Pic.Start_Currency /= Invalid_Position then
391 Dollar := Answer (Pic.Start_Currency) = '$';
394 -- Fix up "direct inserts" outside the playing field. Set up as one
395 -- loop to do the beginning, one (reverse) loop to do the end.
399 exit when Last = Pic.Start_Float;
400 exit when Last = Pic.Radix_Position;
401 exit when Answer (Last) = '9';
403 case Answer (Last) is
406 Answer (Last) := Separator_Character;
409 Answer (Last) := ' ';
416 exit when Last = Answer'Last;
421 -- Now for the end...
423 for J in reverse Last .. Answer'Last loop
424 exit when J = Pic.Radix_Position;
426 -- Do this test First, Separator_Character can equal Pic.Floater.
428 if Answer (J) = Pic.Floater then
435 Answer (J) := Separator_Character;
451 if Pic.Start_Currency /= -1
452 and then Answer (Pic.Start_Currency) = '#'
453 and then Pic.Floater /= '#'
455 if Currency_Symbol'Length >
456 Pic.End_Currency - Pic.Start_Currency + 1
460 elsif Currency_Symbol'Length =
461 Pic.End_Currency - Pic.Start_Currency + 1
463 Answer (Pic.Start_Currency .. Pic.End_Currency) :=
466 elsif Pic.Radix_Position = Invalid_Position
467 or else Pic.Start_Currency < Pic.Radix_Position
469 Answer (Pic.Start_Currency .. Pic.End_Currency) :=
471 Answer (Pic.End_Currency - Currency_Symbol'Length + 1 ..
472 Pic.End_Currency) := Currency_Symbol;
475 Answer (Pic.Start_Currency .. Pic.End_Currency) :=
477 Answer (Pic.Start_Currency ..
478 Pic.Start_Currency + Currency_Symbol'Length - 1) :=
483 -- Fill in leading digits
485 if Attrs.End_Of_Int - Attrs.Start_Of_Int + 1 >
486 Pic.Max_Leading_Digits
491 if Pic.Radix_Position = Invalid_Position then
492 Position := Answer'Last;
494 Position := Pic.Radix_Position - 1;
497 for J in reverse Attrs.Start_Of_Int .. Attrs.End_Of_Int loop
499 while Answer (Position) /= '9'
500 and Answer (Position) /= Pic.Floater
502 if Answer (Position) = '_' then
503 Answer (Position) := Separator_Character;
505 elsif Answer (Position) = 'b' then
506 Answer (Position) := ' ';
509 Position := Position - 1;
512 Answer (Position) := To_Wide (Rounded (J));
514 if Rounded (J) /= '0' then
518 Position := Position - 1;
523 if Pic.Start_Float = Invalid_Position then
525 -- No leading floats, but need to change '9' to '0', '_' to
526 -- Separator_Character and 'b' to ' '.
528 for J in Last .. Position loop
530 -- Last set when fixing the "uninteresting" leaders above.
531 -- Don't duplicate the work.
533 if Answer (J) = '9' then
536 elsif Answer (J) = '_' then
537 Answer (J) := Separator_Character;
539 elsif Answer (J) = 'b' then
546 elsif Pic.Floater = '<'
552 for J in Pic.End_Float .. Position loop -- May be null range.
553 if Answer (J) = '9' then
556 elsif Answer (J) = '_' then
557 Answer (J) := Separator_Character;
559 elsif Answer (J) = 'b' then
565 if Position > Pic.End_Float then
566 Position := Pic.End_Float;
569 for J in Pic.Start_Float .. Position - 1 loop
573 Answer (Position) := Pic.Floater;
574 Sign_Position := Position;
576 elsif Pic.Floater = '$' then
578 for J in Pic.End_Float .. Position loop -- May be null range.
579 if Answer (J) = '9' then
582 elsif Answer (J) = '_' then
583 Answer (J) := ' '; -- no separator before leftmost digit.
585 elsif Answer (J) = 'b' then
590 if Position > Pic.End_Float then
591 Position := Pic.End_Float;
594 for J in Pic.Start_Float .. Position - 1 loop
598 Answer (Position) := Pic.Floater;
599 Currency_Pos := Position;
601 elsif Pic.Floater = '*' then
603 for J in Pic.End_Float .. Position loop -- May be null range.
604 if Answer (J) = '9' then
607 elsif Answer (J) = '_' then
608 Answer (J) := Separator_Character;
610 elsif Answer (J) = 'b' then
615 if Position > Pic.End_Float then
616 Position := Pic.End_Float;
619 for J in Pic.Start_Float .. Position loop
624 if Pic.Floater = '#' then
625 Currency_Pos := Currency_Symbol'Length;
628 for J in reverse Pic.Start_Float .. Position loop
632 Answer (J) := Fill_Character;
634 when 'Z' | 'b' | '/' | '0' =>
640 when '.' | 'V' | 'v' | '<' | '$' | '+' | '-' =>
644 if Currency_Pos = 0 then
647 Answer (J) := Currency_Symbol (Currency_Pos);
648 Currency_Pos := Currency_Pos - 1;
656 Answer (J) := Fill_Character;
662 if Currency_Pos = 0 then
666 Answer (J) := Currency_Symbol (Currency_Pos);
667 Currency_Pos := Currency_Pos - 1;
681 if Pic.Floater = '#' and then Currency_Pos /= 0 then
688 if Sign_Position = Invalid_Position then
689 if Attrs.Negative then
694 if Attrs.Negative then
695 case Answer (Sign_Position) is
696 when 'C' | 'D' | '-' =>
700 Answer (Sign_Position) := '-';
703 Answer (Sign_Position) := '(';
704 Answer (Pic.Second_Sign) := ')';
713 case Answer (Sign_Position) is
716 Answer (Sign_Position) := ' ';
718 when '<' | 'C' | 'D' =>
719 Answer (Sign_Position) := ' ';
720 Answer (Pic.Second_Sign) := ' ';
732 -- Fill in trailing digits
734 if Pic.Max_Trailing_Digits > 0 then
736 if Attrs.Has_Fraction then
737 Position := Attrs.Start_Of_Fraction;
738 Last := Pic.Radix_Position + 1;
740 for J in Last .. Answer'Last loop
742 if Answer (J) = '9' or Answer (J) = Pic.Floater then
743 Answer (J) := To_Wide (Rounded (Position));
745 if Rounded (Position) /= '0' then
749 Position := Position + 1;
752 -- Used up fraction but remember place in Answer
754 exit when Position > Attrs.End_Of_Fraction;
756 elsif Answer (J) = 'b' then
759 elsif Answer (J) = '_' then
760 Answer (J) := Separator_Character;
770 Position := Pic.Radix_Position + 1;
773 -- Now fill remaining 9's with zeros and _ with separators
777 for J in Position .. Last loop
778 if Answer (J) = '9' then
781 elsif Answer (J) = Pic.Floater then
784 elsif Answer (J) = '_' then
785 Answer (J) := Separator_Character;
787 elsif Answer (J) = 'b' then
793 Position := Last + 1;
796 if Pic.Floater = '#' and then Currency_Pos /= 0 then
800 -- No trailing digits, but now J may need to stick in a currency
803 if Pic.Start_Currency = Invalid_Position then
804 Position := Answer'Last + 1;
806 Position := Pic.Start_Currency;
810 for J in Position .. Answer'Last loop
812 if Pic.Start_Currency /= Invalid_Position and then
813 Answer (Pic.Start_Currency) = '#' then
817 -- Note: There are some weird cases J can imagine with 'b' or '#'
818 -- in currency strings where the following code will cause
819 -- glitches. The trick is to tell when the character in the
820 -- answer should be checked, and when to look at the original
821 -- string. Some other time. RIE 11/26/96 ???
825 Answer (J) := Fill_Character;
831 if Currency_Pos > Currency_Symbol'Length then
835 Answer (J) := Currency_Symbol (Currency_Pos);
836 Currency_Pos := Currency_Pos + 1;
844 Answer (J) := Fill_Character;
850 if Currency_Pos > Currency_Symbol'Length then
853 Answer (J) := Currency_Symbol (Currency_Pos);
854 Currency_Pos := Currency_Pos + 1;
868 -- Now get rid of Blank_when_Zero and complete Star fill.
870 if Zero and Pic.Blank_When_Zero then
872 -- Value is zero, and blank it.
877 Last := Last - 1 + Currency_Symbol'Length;
880 if Pic.Radix_Position /= Invalid_Position and then
881 Answer (Pic.Radix_Position) = 'V' then
885 return Wide_String'(1 .. Last => ' ');
887 elsif Zero and Pic.Star_Fill then
891 Last := Last - 1 + Currency_Symbol'Length;
894 if Pic.Radix_Position /= Invalid_Position then
896 if Answer (Pic.Radix_Position) = 'V' then
900 if Pic.Radix_Position > Pic.Start_Currency then
901 return Wide_String' (1 .. Pic.Radix_Position - 1 => '*') &
903 Wide_String' (Pic.Radix_Position + 1 .. Last => '*');
909 Pic.Radix_Position + Currency_Symbol'Length - 2
913 (Pic.Radix_Position + Currency_Symbol'Length .. Last
919 Wide_String'(1 .. Pic.Radix_Position - 1 => '*') &
921 Wide_String'(Pic.Radix_Position + 1 .. Last => '*');
925 return Wide_String' (1 .. Last => '*');
928 -- This was once a simple return statement, now there are nine
929 -- different return cases. Not to mention the five above to deal
930 -- with zeros. Why not split things out?
932 -- Processing the radix and sign expansion separately
933 -- would require lots of copying--the string and some of its
934 -- indices--without really simplifying the logic. The cases are:
936 -- 1) Expand $, replace '.' with Radix_Point
937 -- 2) No currency expansion, replace '.' with Radix_Point
938 -- 3) Expand $, radix blanked
939 -- 4) No currency expansion, radix blanked
941 -- 6) Expand $, Elide V
942 -- 7) Elide V, Expand $ (Two cases depending on order.)
943 -- 8) No radix, expand $
944 -- 9) No radix, no currency expansion
946 if Pic.Radix_Position /= Invalid_Position then
948 if Answer (Pic.Radix_Position) = '.' then
949 Answer (Pic.Radix_Position) := Radix_Point;
953 -- 1) Expand $, replace '.' with Radix_Point
955 return Answer (1 .. Currency_Pos - 1) & Currency_Symbol &
956 Answer (Currency_Pos + 1 .. Answer'Last);
959 -- 2) No currency expansion, replace '.' with Radix_Point
964 elsif Answer (Pic.Radix_Position) = ' ' then -- blanked radix.
967 -- 3) Expand $, radix blanked
969 return Answer (1 .. Currency_Pos - 1) & Currency_Symbol &
970 Answer (Currency_Pos + 1 .. Answer'Last);
973 -- 4) No expansion, radix blanked
985 return Answer (1 .. Pic.Radix_Position - 1) &
986 Answer (Pic.Radix_Position + 1 .. Answer'Last);
988 elsif Currency_Pos < Pic.Radix_Position then
990 -- 6) Expand $, Elide V
992 return Answer (1 .. Currency_Pos - 1) & Currency_Symbol &
993 Answer (Currency_Pos + 1 .. Pic.Radix_Position - 1) &
994 Answer (Pic.Radix_Position + 1 .. Answer'Last);
997 -- 7) Elide V, Expand $
999 return Answer (1 .. Pic.Radix_Position - 1) &
1000 Answer (Pic.Radix_Position + 1 .. Currency_Pos - 1) &
1002 Answer (Currency_Pos + 1 .. Answer'Last);
1008 -- 8) No radix, expand $
1010 return Answer (1 .. Currency_Pos - 1) & Currency_Symbol &
1011 Answer (Currency_Pos + 1 .. Answer'Last);
1014 -- 9) No radix, no currency expansion
1021 -------------------------
1022 -- Parse_Number_String --
1023 -------------------------
1025 function Parse_Number_String (Str : String) return Number_Attributes is
1026 Answer : Number_Attributes;
1029 for J in Str'Range loop
1037 -- Decide if this is the start of a number.
1038 -- If so, figure out which one...
1040 if Answer.Has_Fraction then
1041 Answer.End_Of_Fraction := J;
1043 if Answer.Start_Of_Int = Invalid_Position then
1045 Answer.Start_Of_Int := J;
1047 Answer.End_Of_Int := J;
1052 -- Only count a zero before the decimal point if it follows a
1053 -- non-zero digit. After the decimal point, zeros will be
1054 -- counted if followed by a non-zero digit.
1056 if not Answer.Has_Fraction then
1057 if Answer.Start_Of_Int /= Invalid_Position then
1058 Answer.End_Of_Int := J;
1066 Answer.Negative := True;
1070 -- Close integer, start fraction
1072 if Answer.Has_Fraction then
1073 raise Picture_Error;
1076 -- Two decimal points is a no-no.
1078 Answer.Has_Fraction := True;
1079 Answer.End_Of_Fraction := J;
1081 -- Could leave this at Invalid_Position, but this seems the
1082 -- right way to indicate a null range...
1084 Answer.Start_Of_Fraction := J + 1;
1085 Answer.End_Of_Int := J - 1;
1088 raise Picture_Error; -- can this happen? probably not!
1092 if Answer.Start_Of_Int = Invalid_Position then
1093 Answer.Start_Of_Int := Answer.End_Of_Int + 1;
1096 -- No significant (intger) digits needs a null range.
1100 end Parse_Number_String;
1106 -- The following ensures that we return B and not b being careful not
1107 -- to break things which expect lower case b for blank. See CXF3A02.
1109 function Pic_String (Pic : in Picture) return String is
1110 Temp : String (1 .. Pic.Contents.Picture.Length) :=
1111 Pic.Contents.Picture.Expanded;
1113 for J in Temp'Range loop
1114 if Temp (J) = 'b' then Temp (J) := 'B'; end if;
1124 procedure Precalculate (Pic : in out Format_Record) is
1126 Computed_BWZ : Boolean := True;
1128 type Legality is (Okay, Reject);
1129 State : Legality := Reject;
1130 -- Start in reject, which will reject null strings.
1132 Index : Pic_Index := Pic.Picture.Expanded'First;
1134 function At_End return Boolean;
1135 pragma Inline (At_End);
1137 procedure Set_State (L : Legality);
1138 pragma Inline (Set_State);
1140 function Look return Character;
1141 pragma Inline (Look);
1143 function Is_Insert return Boolean;
1144 pragma Inline (Is_Insert);
1147 pragma Inline (Skip);
1149 procedure Trailing_Currency;
1150 procedure Trailing_Bracket;
1151 procedure Number_Fraction;
1152 procedure Number_Completion;
1153 procedure Number_Fraction_Or_Bracket;
1154 procedure Number_Fraction_Or_Z_Fill;
1155 procedure Zero_Suppression;
1156 procedure Floating_Bracket;
1157 procedure Number_Fraction_Or_Star_Fill;
1158 procedure Star_Suppression;
1159 procedure Number_Fraction_Or_Dollar;
1160 procedure Leading_Dollar;
1161 procedure Number_Fraction_Or_Pound;
1162 procedure Leading_Pound;
1164 procedure Floating_Plus;
1165 procedure Floating_Minus;
1166 procedure Picture_Plus;
1167 procedure Picture_Minus;
1168 procedure Picture_Bracket;
1170 procedure Optional_RHS_Sign;
1171 procedure Picture_String;
1177 function At_End return Boolean is
1179 return Index > Pic.Picture.Length;
1182 ----------------------
1183 -- Floating_Bracket --
1184 ----------------------
1186 -- Note that Floating_Bracket is only called with an acceptable
1187 -- prefix. But we don't set Okay, because we must end with a '>'.
1189 procedure Floating_Bracket is
1192 Pic.End_Float := Index;
1193 Pic.Max_Leading_Digits := Pic.Max_Leading_Digits + 1;
1195 -- First bracket wasn't counted...
1206 when '_' | '0' | '/' =>
1207 Pic.End_Float := Index;
1211 Pic.End_Float := Index;
1212 Pic.Picture.Expanded (Index) := 'b';
1216 Pic.End_Float := Index;
1217 Pic.Max_Leading_Digits := Pic.Max_Leading_Digits + 1;
1229 when 'V' | 'v' | '.' =>
1230 Pic.Radix_Position := Index;
1232 Number_Fraction_Or_Bracket;
1239 end Floating_Bracket;
1241 --------------------
1242 -- Floating_Minus --
1243 --------------------
1245 procedure Floating_Minus is
1253 when '_' | '0' | '/' =>
1254 Pic.End_Float := Index;
1258 Pic.End_Float := Index;
1259 Pic.Picture.Expanded (Index) := 'b';
1263 Pic.Max_Leading_Digits := Pic.Max_Leading_Digits + 1;
1264 Pic.End_Float := Index;
1271 when '.' | 'V' | 'v' =>
1272 Pic.Radix_Position := Index;
1275 while Is_Insert loop
1292 Pic.Max_Trailing_Digits :=
1293 Pic.Max_Trailing_Digits + 1;
1294 Pic.End_Float := Index;
1297 when '_' | '0' | '/' =>
1301 Pic.Picture.Expanded (Index) := 'b';
1326 procedure Floating_Plus is
1334 when '_' | '0' | '/' =>
1335 Pic.End_Float := Index;
1339 Pic.End_Float := Index;
1340 Pic.Picture.Expanded (Index) := 'b';
1344 Pic.Max_Leading_Digits := Pic.Max_Leading_Digits + 1;
1345 Pic.End_Float := Index;
1352 when '.' | 'V' | 'v' =>
1353 Pic.Radix_Position := Index;
1356 while Is_Insert loop
1373 Pic.Max_Trailing_Digits :=
1374 Pic.Max_Trailing_Digits + 1;
1375 Pic.End_Float := Index;
1378 when '_' | '0' | '/' =>
1382 Pic.Picture.Expanded (Index) := 'b';
1408 function Is_Insert return Boolean is
1414 case Pic.Picture.Expanded (Index) is
1416 when '_' | '0' | '/' => return True;
1419 Pic.Picture.Expanded (Index) := 'b'; -- canonical
1422 when others => return False;
1426 --------------------
1427 -- Leading_Dollar --
1428 --------------------
1430 -- Note that Leading_Dollar can be called in either State.
1431 -- It will set state to Okay only if a 9 or (second) $
1434 -- Also notice the tricky bit with State and Zero_Suppression.
1435 -- Zero_Suppression is Picture_Error if a '$' or a '9' has been
1436 -- encountered, exactly the cases where State has been set.
1438 procedure Leading_Dollar is
1440 -- Treat as a floating dollar, and unwind otherwise.
1443 Pic.Start_Currency := Index;
1444 Pic.End_Currency := Index;
1445 Pic.Start_Float := Index;
1446 Pic.End_Float := Index;
1448 -- Don't increment Pic.Max_Leading_Digits, we need one "real"
1460 when '_' | '0' | '/' =>
1461 Pic.End_Float := Index;
1464 -- A trailing insertion character is not part of the
1465 -- floating currency, so need to look ahead.
1468 Pic.End_Float := Pic.End_Float - 1;
1472 Pic.End_Float := Index;
1473 Pic.Picture.Expanded (Index) := 'b';
1477 Pic.Picture.Expanded (Index) := 'Z'; -- consistency
1479 if State = Okay then
1480 raise Picture_Error;
1482 -- Will overwrite Floater and Start_Float
1488 if State = Okay then
1489 raise Picture_Error;
1491 -- Will overwrite Floater and Start_Float
1497 Pic.Max_Leading_Digits := Pic.Max_Leading_Digits + 1;
1498 Pic.End_Float := Index;
1499 Pic.End_Currency := Index;
1500 Set_State (Okay); Skip;
1503 if State /= Okay then
1505 Pic.Start_Float := Invalid_Position;
1506 Pic.End_Float := Invalid_Position;
1509 -- A single dollar does not a floating make.
1514 when 'V' | 'v' | '.' =>
1515 if State /= Okay then
1517 Pic.Start_Float := Invalid_Position;
1518 Pic.End_Float := Invalid_Position;
1521 -- Only one dollar before the sign is okay,
1522 -- but doesn't float.
1524 Pic.Radix_Position := Index;
1526 Number_Fraction_Or_Dollar;
1540 -- This one is complex! A Leading_Pound can be fixed or floating,
1541 -- but in some cases the decision has to be deferred until we leave
1542 -- this procedure. Also note that Leading_Pound can be called in
1545 -- It will set state to Okay only if a 9 or (second) # is
1548 -- One Last note: In ambiguous cases, the currency is treated as
1549 -- floating unless there is only one '#'.
1551 procedure Leading_Pound is
1553 Inserts : Boolean := False;
1554 -- Set to True if a '_', '0', '/', 'B', or 'b' is encountered
1556 Must_Float : Boolean := False;
1557 -- Set to true if a '#' occurs after an insert.
1560 -- Treat as a floating currency. If it isn't, this will be
1561 -- overwritten later.
1565 Pic.Start_Currency := Index;
1566 Pic.End_Currency := Index;
1567 Pic.Start_Float := Index;
1568 Pic.End_Float := Index;
1570 -- Don't increment Pic.Max_Leading_Digits, we need one "real"
1573 Pic.Max_Currency_Digits := 1; -- we've seen one.
1584 when '_' | '0' | '/' =>
1585 Pic.End_Float := Index;
1590 Pic.Picture.Expanded (Index) := 'b';
1591 Pic.End_Float := Index;
1596 Pic.Picture.Expanded (Index) := 'Z'; -- consistency
1599 raise Picture_Error;
1601 Pic.Max_Leading_Digits := 0;
1603 -- Will overwrite Floater and Start_Float
1610 raise Picture_Error;
1612 Pic.Max_Leading_Digits := 0;
1614 -- Will overwrite Floater and Start_Float
1624 Pic.Max_Leading_Digits := Pic.Max_Leading_Digits + 1;
1625 Pic.End_Float := Index;
1626 Pic.End_Currency := Index;
1631 if State /= Okay then
1633 -- A single '#' doesn't float.
1636 Pic.Start_Float := Invalid_Position;
1637 Pic.End_Float := Invalid_Position;
1643 when 'V' | 'v' | '.' =>
1644 if State /= Okay then
1646 Pic.Start_Float := Invalid_Position;
1647 Pic.End_Float := Invalid_Position;
1650 -- Only one pound before the sign is okay,
1651 -- but doesn't float.
1653 Pic.Radix_Position := Index;
1655 Number_Fraction_Or_Pound;
1668 function Look return Character is
1671 raise Picture_Error;
1674 return Pic.Picture.Expanded (Index);
1686 when '_' | '0' | '/' =>
1690 Pic.Picture.Expanded (Index) := 'b';
1694 Computed_BWZ := False;
1695 Pic.Max_Leading_Digits := Pic.Max_Leading_Digits + 1;
1699 when '.' | 'V' | 'v' =>
1700 Pic.Radix_Position := Index;
1714 -- Will return in Okay state if a '9' was seen.
1719 -----------------------
1720 -- Number_Completion --
1721 -----------------------
1723 procedure Number_Completion is
1725 while not At_End loop
1728 when '_' | '0' | '/' =>
1732 Pic.Picture.Expanded (Index) := 'b';
1736 Computed_BWZ := False;
1737 Pic.Max_Leading_Digits := Pic.Max_Leading_Digits + 1;
1741 when 'V' | 'v' | '.' =>
1742 Pic.Radix_Position := Index;
1751 end Number_Completion;
1753 ---------------------
1754 -- Number_Fraction --
1755 ---------------------
1757 procedure Number_Fraction is
1759 -- Note that number fraction can be called in either State.
1760 -- It will set state to Valid only if a 9 is encountered.
1768 when '_' | '0' | '/' =>
1772 Pic.Picture.Expanded (Index) := 'b';
1776 Computed_BWZ := False;
1777 Pic.Max_Trailing_Digits := Pic.Max_Trailing_Digits + 1;
1778 Set_State (Okay); Skip;
1784 end Number_Fraction;
1786 --------------------------------
1787 -- Number_Fraction_Or_Bracket --
1788 --------------------------------
1790 procedure Number_Fraction_Or_Bracket is
1799 when '_' | '0' | '/' => Skip;
1802 Pic.Picture.Expanded (Index) := 'b';
1806 Pic.Max_Trailing_Digits := Pic.Max_Trailing_Digits + 1;
1807 Pic.End_Float := Index;
1816 when '_' | '0' | '/' =>
1820 Pic.Picture.Expanded (Index) := 'b';
1824 Pic.Max_Trailing_Digits :=
1825 Pic.Max_Trailing_Digits + 1;
1826 Pic.End_Float := Index;
1839 end Number_Fraction_Or_Bracket;
1841 -------------------------------
1842 -- Number_Fraction_Or_Dollar --
1843 -------------------------------
1845 procedure Number_Fraction_Or_Dollar is
1853 when '_' | '0' | '/' =>
1857 Pic.Picture.Expanded (Index) := 'b';
1861 Pic.Max_Trailing_Digits := Pic.Max_Trailing_Digits + 1;
1862 Pic.End_Float := Index;
1871 when '_' | '0' | '/' =>
1875 Pic.Picture.Expanded (Index) := 'b';
1879 Pic.Max_Trailing_Digits :=
1880 Pic.Max_Trailing_Digits + 1;
1881 Pic.End_Float := Index;
1894 end Number_Fraction_Or_Dollar;
1896 ------------------------------
1897 -- Number_Fraction_Or_Pound --
1898 ------------------------------
1900 procedure Number_Fraction_Or_Pound is
1909 when '_' | '0' | '/' =>
1913 Pic.Picture.Expanded (Index) := 'b';
1917 Pic.Max_Trailing_Digits := Pic.Max_Trailing_Digits + 1;
1918 Pic.End_Float := Index;
1928 when '_' | '0' | '/' =>
1932 Pic.Picture.Expanded (Index) := 'b';
1936 Pic.Max_Trailing_Digits :=
1937 Pic.Max_Trailing_Digits + 1;
1938 Pic.End_Float := Index;
1953 end Number_Fraction_Or_Pound;
1955 ----------------------------------
1956 -- Number_Fraction_Or_Star_Fill --
1957 ----------------------------------
1959 procedure Number_Fraction_Or_Star_Fill is
1968 when '_' | '0' | '/' =>
1972 Pic.Picture.Expanded (Index) := 'b';
1976 Pic.Star_Fill := True;
1977 Pic.Max_Trailing_Digits := Pic.Max_Trailing_Digits + 1;
1978 Pic.End_Float := Index;
1988 when '_' | '0' | '/' =>
1992 Pic.Picture.Expanded (Index) := 'b';
1996 Pic.Star_Fill := True;
1997 Pic.Max_Trailing_Digits :=
1998 Pic.Max_Trailing_Digits + 1;
1999 Pic.End_Float := Index;
2013 end Number_Fraction_Or_Star_Fill;
2015 -------------------------------
2016 -- Number_Fraction_Or_Z_Fill --
2017 -------------------------------
2019 procedure Number_Fraction_Or_Z_Fill is
2028 when '_' | '0' | '/' =>
2032 Pic.Picture.Expanded (Index) := 'b';
2036 Pic.Max_Trailing_Digits := Pic.Max_Trailing_Digits + 1;
2037 Pic.End_Float := Index;
2038 Pic.Picture.Expanded (Index) := 'Z'; -- consistency
2049 when '_' | '0' | '/' =>
2053 Pic.Picture.Expanded (Index) := 'b';
2057 Pic.Picture.Expanded (Index) := 'Z'; -- consistency
2059 Pic.Max_Trailing_Digits :=
2060 Pic.Max_Trailing_Digits + 1;
2061 Pic.End_Float := Index;
2074 end Number_Fraction_Or_Z_Fill;
2076 -----------------------
2077 -- Optional_RHS_Sign --
2078 -----------------------
2080 procedure Optional_RHS_Sign is
2089 Pic.Sign_Position := Index;
2094 Pic.Sign_Position := Index;
2095 Pic.Picture.Expanded (Index) := 'C';
2098 if Look = 'R' or Look = 'r' then
2099 Pic.Second_Sign := Index;
2100 Pic.Picture.Expanded (Index) := 'R';
2104 raise Picture_Error;
2110 Pic.Sign_Position := Index;
2111 Pic.Picture.Expanded (Index) := 'D';
2114 if Look = 'B' or Look = 'b' then
2115 Pic.Second_Sign := Index;
2116 Pic.Picture.Expanded (Index) := 'B';
2120 raise Picture_Error;
2126 if Pic.Picture.Expanded (Pic.Sign_Position) = '<' then
2127 Pic.Second_Sign := Index;
2131 raise Picture_Error;
2138 end Optional_RHS_Sign;
2144 -- Note that Picture can be called in either State.
2146 -- It will set state to Valid only if a 9 is encountered or floating
2147 -- currency is called.
2149 procedure Picture is
2158 when '_' | '0' | '/' =>
2162 Pic.Picture.Expanded (Index) := 'b';
2174 Computed_BWZ := False;
2176 Pic.Max_Leading_Digits := Pic.Max_Leading_Digits + 1;
2179 when 'V' | 'v' | '.' =>
2180 Pic.Radix_Position := Index;
2193 ---------------------
2194 -- Picture_Bracket --
2195 ---------------------
2197 procedure Picture_Bracket is
2199 Pic.Sign_Position := Index;
2200 Pic.Sign_Position := Index;
2202 -- Treat as a floating sign, and unwind otherwise.
2205 Pic.Start_Float := Index;
2206 Pic.End_Float := Index;
2208 -- Don't increment Pic.Max_Leading_Digits, we need one "real"
2211 Skip; -- Known Bracket
2216 when '_' | '0' | '/' =>
2217 Pic.End_Float := Index;
2221 Pic.End_Float := Index;
2222 Pic.Picture.Expanded (Index) := 'b';
2226 Set_State (Okay); -- "<<>" is enough.
2232 when '$' | '#' | '9' | '*' =>
2233 if State /= Okay then
2235 Pic.Start_Float := Invalid_Position;
2236 Pic.End_Float := Invalid_Position;
2244 when '.' | 'V' | 'v' =>
2245 if State /= Okay then
2247 Pic.Start_Float := Invalid_Position;
2248 Pic.End_Float := Invalid_Position;
2251 -- Don't assume that state is okay, haven't seen a digit
2258 raise Picture_Error;
2262 end Picture_Bracket;
2268 procedure Picture_Minus is
2270 Pic.Sign_Position := Index;
2272 -- Treat as a floating sign, and unwind otherwise.
2275 Pic.Start_Float := Index;
2276 Pic.End_Float := Index;
2278 -- Don't increment Pic.Max_Leading_Digits, we need one "real"
2281 Skip; -- Known Minus
2286 when '_' | '0' | '/' =>
2287 Pic.End_Float := Index;
2291 Pic.End_Float := Index;
2292 Pic.Picture.Expanded (Index) := 'b';
2296 Pic.Max_Leading_Digits := Pic.Max_Leading_Digits + 1;
2297 Pic.End_Float := Index;
2299 Set_State (Okay); -- "-- " is enough.
2304 when '$' | '#' | '9' | '*' =>
2305 if State /= Okay then
2307 Pic.Start_Float := Invalid_Position;
2308 Pic.End_Float := Invalid_Position;
2317 -- Can't have Z and a floating sign.
2319 if State = Okay then
2323 Pic.Picture.Expanded (Index) := 'Z'; -- consistency
2329 when '.' | 'V' | 'v' =>
2330 if State /= Okay then
2332 Pic.Start_Float := Invalid_Position;
2333 Pic.End_Float := Invalid_Position;
2336 -- Don't assume that state is okay, haven't seen a digit.
2352 procedure Picture_Plus is
2354 Pic.Sign_Position := Index;
2356 -- Treat as a floating sign, and unwind otherwise.
2359 Pic.Start_Float := Index;
2360 Pic.End_Float := Index;
2362 -- Don't increment Pic.Max_Leading_Digits, we need one "real"
2370 when '_' | '0' | '/' =>
2371 Pic.End_Float := Index;
2375 Pic.End_Float := Index;
2376 Pic.Picture.Expanded (Index) := 'b';
2380 Pic.Max_Leading_Digits := Pic.Max_Leading_Digits + 1;
2381 Pic.End_Float := Index;
2383 Set_State (Okay); -- "++" is enough.
2388 when '$' | '#' | '9' | '*' =>
2389 if State /= Okay then
2391 Pic.Start_Float := Invalid_Position;
2392 Pic.End_Float := Invalid_Position;
2400 if State = Okay then
2404 -- Can't have Z and a floating sign.
2406 Pic.Picture.Expanded (Index) := 'Z'; -- consistency
2408 -- '+Z' is acceptable
2417 when '.' | 'V' | 'v' =>
2418 if State /= Okay then
2420 Pic.Start_Float := Invalid_Position;
2421 Pic.End_Float := Invalid_Position;
2424 -- Don't assume that state is okay, haven't seen a digit.
2436 --------------------
2437 -- Picture_String --
2438 --------------------
2440 procedure Picture_String is
2442 while Is_Insert loop
2462 Pic.Picture.Expanded (Index) := 'Z'; -- consistency
2472 when '9' | '.' | 'V' | 'v' =>
2478 raise Picture_Error;
2482 -- Blank when zero either if the PIC does not contain a '9' or if
2483 -- requested by the user and no '*'
2485 Pic.Blank_When_Zero :=
2486 (Computed_BWZ or Pic.Blank_When_Zero) and not Pic.Star_Fill;
2488 -- Star fill if '*' and no '9'.
2490 Pic.Star_Fill := Pic.Star_Fill and Computed_BWZ;
2502 procedure Set_State (L : Legality) is
2516 ----------------------
2517 -- Star_Suppression --
2518 ----------------------
2520 procedure Star_Suppression is
2523 Pic.Start_Float := Index;
2524 Pic.End_Float := Index;
2525 Pic.Max_Leading_Digits := Pic.Max_Leading_Digits + 1;
2528 -- Even a single * is a valid picture
2530 Pic.Star_Fill := True;
2540 when '_' | '0' | '/' =>
2541 Pic.End_Float := Index;
2545 Pic.End_Float := Index;
2546 Pic.Picture.Expanded (Index) := 'b';
2550 Pic.End_Float := Index;
2551 Pic.Max_Leading_Digits := Pic.Max_Leading_Digits + 1;
2552 Set_State (Okay); Skip;
2559 when '.' | 'V' | 'v' =>
2560 Pic.Radix_Position := Index;
2562 Number_Fraction_Or_Star_Fill;
2570 when others => raise Picture_Error;
2573 end Star_Suppression;
2575 ----------------------
2576 -- Trailing_Bracket --
2577 ----------------------
2579 procedure Trailing_Bracket is
2582 Pic.Second_Sign := Index;
2585 raise Picture_Error;
2587 end Trailing_Bracket;
2589 -----------------------
2590 -- Trailing_Currency --
2591 -----------------------
2593 procedure Trailing_Currency is
2600 Pic.Start_Currency := Index;
2601 Pic.End_Currency := Index;
2605 while not At_End and then Look = '#' loop
2606 if Pic.Start_Currency = Invalid_Position then
2607 Pic.Start_Currency := Index;
2610 Pic.End_Currency := Index;
2621 when '_' | '0' | '/' => Skip;
2624 Pic.Picture.Expanded (Index) := 'b';
2627 when others => return;
2630 end Trailing_Currency;
2632 ----------------------
2633 -- Zero_Suppression --
2634 ----------------------
2636 procedure Zero_Suppression is
2639 Pic.Start_Float := Index;
2640 Pic.End_Float := Index;
2641 Pic.Max_Leading_Digits := Pic.Max_Leading_Digits + 1;
2642 Pic.Picture.Expanded (Index) := 'Z'; -- consistency
2647 -- Even a single Z is a valid picture
2655 when '_' | '0' | '/' =>
2656 Pic.End_Float := Index;
2660 Pic.End_Float := Index;
2661 Pic.Picture.Expanded (Index) := 'b';
2665 Pic.Picture.Expanded (Index) := 'Z'; -- consistency
2667 Pic.Max_Leading_Digits := Pic.Max_Leading_Digits + 1;
2668 Pic.End_Float := Index;
2677 when '.' | 'V' | 'v' =>
2678 Pic.Radix_Position := Index;
2680 Number_Fraction_Or_Z_Fill;
2692 end Zero_Suppression;
2694 -- Start of processing for Precalculate
2699 if State = Reject then
2700 raise Picture_Error;
2705 when Constraint_Error =>
2707 -- To deal with special cases like null strings.
2709 raise Picture_Error;
2718 (Pic_String : in String;
2719 Blank_When_Zero : in Boolean := False)
2726 Item : constant String := Expand (Pic_String);
2729 Result.Contents.Picture := (Item'Length, Item);
2730 Result.Contents.Original_BWZ := Blank_When_Zero;
2731 Result.Contents.Blank_When_Zero := Blank_When_Zero;
2732 Precalculate (Result.Contents);
2738 raise Picture_Error;
2746 function To_Wide (C : Character) return Wide_Character is
2748 return Wide_Character'Val (Character'Pos (C));
2756 (Pic_String : in String;
2757 Blank_When_Zero : in Boolean := False)
2762 Expanded_Pic : constant String := Expand (Pic_String);
2763 -- Raises Picture_Error if Item not well-formed
2765 Format_Rec : Format_Record;
2768 Format_Rec.Picture := (Expanded_Pic'Length, Expanded_Pic);
2769 Format_Rec.Blank_When_Zero := Blank_When_Zero;
2770 Format_Rec.Original_BWZ := Blank_When_Zero;
2771 Precalculate (Format_Rec);
2773 -- False only if Blank_When_0 is True but the pic string
2776 return not Blank_When_Zero or
2777 Strings_Fixed.Index (Expanded_Pic, "*") = 0;
2781 when others => return False;
2785 end Ada.Wide_Text_IO.Editing;