gcc/ada/a-teioed.ads

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