gcc/ada/a-wtedit.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUN-TIME COMPONENTS                         --
   4 --                                                                          --
   5 --             A D A . W I D E _ T E X T _ I O . E D I T I N G              --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --                            $Revision: 1.3 $                              --
  10 --                                                                          --
  11 --          Copyright (C) 1992-1997 Free Software Foundation, Inc.          --
  12 --                                                                          --
  13 -- This specification is derived from the Ada Reference Manual for use with --
  14 -- GNAT. The copyright notice above, and the license provisions that follow --
  15 -- apply solely to the  contents of the part following the private keyword. --
  16 --                                                                          --
  17 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  18 -- terms of the  GNU General Public License as published  by the Free Soft- --
  19 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  20 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  21 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  22 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  23 -- for  more details.  You should have  received  a copy of the GNU General --
  24 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  25 -- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
  26 -- MA 02111-1307, USA.                                                      --
  27 --                                                                          --
  28 -- As a special exception,  if other files  instantiate  generics from this --
  29 -- unit, or you link  this unit with other files  to produce an executable, --
  30 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  31 -- covered  by the  GNU  General  Public  License.  This exception does not --
  32 -- however invalidate  any other reasons why  the executable file  might be --
  33 -- covered by the  GNU Public License.                                      --
  34 --                                                                          --
  35 -- GNAT was originally developed  by the GNAT team at  New York University. --
  36 -- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
  37 --                                                                          --
  38 ------------------------------------------------------------------------------
  39
  40 package Ada.Wide_Text_IO.Editing is
  41
  42    type Picture is private;
  43
  44    function Valid
  45      (Pic_String      : in String;
  46       Blank_When_Zero : in Boolean := False)
  47       return            Boolean;
  48
  49    function To_Picture
  50      (Pic_String      : in String;
  51       Blank_When_Zero : in Boolean := False)
  52       return            Picture;
  53
  54    function Pic_String      (Pic : in Picture) return String;
  55    function Blank_When_Zero (Pic : in Picture) return Boolean;
  56
  57    Max_Picture_Length : constant := 64;
  58
  59    Picture_Error : exception;
  60
  61    Default_Currency   : constant Wide_String    := "$";
  62    Default_Fill       : constant Wide_Character := ' ';
  63    Default_Separator  : constant Wide_Character := ',';
  64    Default_Radix_Mark : constant Wide_Character := '.';
  65
  66    generic
  67       type Num is delta <> digits <>;
  68       Default_Currency   : in Wide_String :=
  69                                 Wide_Text_IO.Editing.Default_Currency;
  70       Default_Fill       : in Wide_Character :=
  71                                 Wide_Text_IO.Editing.Default_Fill;
  72       Default_Separator  : in Wide_Character :=
  73                                 Wide_Text_IO.Editing.Default_Separator;
  74       Default_Radix_Mark : in Wide_Character :=
  75                                 Wide_Text_IO.Editing.Default_Radix_Mark;
  76
  77    package Decimal_Output is
  78
  79       function Length
  80         (Pic      : in Picture;
  81          Currency : in Wide_String := Default_Currency)
  82          return     Natural;
  83
  84       function Valid
  85         (Item     : Num;
  86          Pic      : in Picture;
  87          Currency : in Wide_String := Default_Currency)
  88          return     Boolean;
  89
  90       function Image
  91         (Item       : Num;
  92          Pic        : in Picture;
  93          Currency   : in Wide_String    := Default_Currency;
  94          Fill       : in Wide_Character := Default_Fill;
  95          Separator  : in Wide_Character := Default_Separator;
  96          Radix_Mark : in Wide_Character := Default_Radix_Mark)
  97          return       Wide_String;
  98
  99       procedure Put
 100         (File       : in File_Type;
 101          Item       : Num;
 102          Pic        : in Picture;
 103          Currency   : in Wide_String    := Default_Currency;
 104          Fill       : in Wide_Character := Default_Fill;
 105          Separator  : in Wide_Character := Default_Separator;
 106          Radix_Mark : in Wide_Character := Default_Radix_Mark);
 107
 108       procedure Put
 109         (Item       : Num;
 110          Pic        : in Picture;
 111          Currency   : in Wide_String    := Default_Currency;
 112          Fill       : in Wide_Character := Default_Fill;
 113          Separator  : in Wide_Character := Default_Separator;
 114          Radix_Mark : in Wide_Character := Default_Radix_Mark);
 115
 116       procedure Put
 117         (To         : out Wide_String;
 118          Item       : Num;
 119          Pic        : in Picture;
 120          Currency   : in Wide_String    := Default_Currency;
 121          Fill       : in Wide_Character := Default_Fill;
 122          Separator  : in Wide_Character := Default_Separator;
 123          Radix_Mark : in Wide_Character := Default_Radix_Mark);
 124
 125    end Decimal_Output;
 126
 127 private
 128    MAX_PICSIZE      : constant := 50;
 129    MAX_MONEYSIZE    : constant := 10;
 130    Invalid_Position : constant := -1;
 131
 132    subtype Pic_Index is Natural range 0 .. MAX_PICSIZE;
 133
 134    type Picture_Record (Length : Pic_Index := 0) is record
 135       Expanded : String (1 .. Length);
 136    end record;
 137
 138    type Format_Record is record
 139       Picture              : Picture_Record;
 140       --  Read only
 141
 142       Blank_When_Zero      : Boolean;
 143       --  Read/write
 144
 145       Original_BWZ         : Boolean;
 146
 147       --  The following components get written
 148
 149       Star_Fill            : Boolean := False;
 150
 151       Radix_Position       : Integer := Invalid_Position;
 152
 153       Sign_Position,
 154       Second_Sign          : Integer := Invalid_Position;
 155
 156       Start_Float,
 157       End_Float            : Integer := Invalid_Position;
 158
 159       Start_Currency,
 160       End_Currency         : Integer := Invalid_Position;
 161
 162       Max_Leading_Digits   : Integer := 0;
 163
 164       Max_Trailing_Digits  : Integer := 0;
 165
 166       Max_Currency_Digits  : Integer := 0;
 167
 168       Floater              : Wide_Character := '!';
 169       --  Initialized to illegal value
 170
 171    end record;
 172
 173    type Picture is record
 174       Contents : Format_Record;
 175    end record;
 176
 177    type Number_Attributes is record
 178       Negative     : Boolean := False;
 179
 180       Has_Fraction : Boolean := False;
 181
 182       Start_Of_Int,
 183       End_Of_Int,
 184       Start_Of_Fraction,
 185       End_Of_Fraction : Integer := Invalid_Position;    -- invalid value
 186    end record;
 187
 188    function Parse_Number_String (Str : String) return Number_Attributes;
 189    --  Assumed format is 'IMAGE or Fixed_IO.Put format (depends on no
 190    --  trailing blanks...)
 191
 192    procedure Precalculate (Pic : in out Format_Record);
 193    --  Precalculates fields from the user supplied data
 194
 195    function Format_Number
 196      (Pic                 : Format_Record;
 197       Number              : String;
 198       Currency_Symbol     : Wide_String;
 199       Fill_Character      : Wide_Character;
 200       Separator_Character : Wide_Character;
 201       Radix_Point         : Wide_Character)
 202       return                Wide_String;
 203    --  Formats number according to Pic
 204
 205    function Expand (Picture : in String) return String;
 206
 207 end Ada.Wide_Text_IO.Editing;