gnatprove_11.2.3_f7ece6d3/libexec/spark/lib/gcc/x86_64-pc-linux-gnu/11.2.0/adainclude/a-wtfiau.adb

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
------------------------------------------------------------------------------
--                                                                          --
--                         GNAT RUN-TIME COMPONENTS                         --
--                                                                          --
--             A D A . W I D E _ T E X T _ I O . F I X E D _ I O            --
--                                                                          --
--                                 B o d y                                  --
--                                                                          --
--            Copyright (C) 2020, Free Software Foundation, Inc.            --
--                                                                          --
-- GNAT is free software;  you can  redistribute it  and/or modify it under --
-- terms of the  GNU General Public License as published  by the Free Soft- --
-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
--                                                                          --
-- As a special exception under Section 7 of GPL version 3, you are granted --
-- additional permissions described in the GCC Runtime Library Exception,   --
-- version 3.1, as published by the Free Software Foundation.               --
--                                                                          --
-- You should have received a copy of the GNU General Public License and    --
-- a copy of the GCC Runtime Library Exception along with this program;     --
-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
-- <http://www.gnu.org/licenses/>.                                          --
--                                                                          --
-- GNAT was originally developed  by the GNAT team at  New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc.      --
--                                                                          --
------------------------------------------------------------------------------

with Ada.Wide_Text_IO.Generic_Aux; use Ada.Wide_Text_IO.Generic_Aux;

package body Ada.Wide_Text_IO.Fixed_Aux is

   ---------
   -- Get --
   ---------

   function Get
     (File  : File_Type;
      Width : Field;
      Num   : Int;
      Den   : Int) return Int
   is
      Buf  : String (1 .. Field'Last);
      Ptr  : aliased Integer;
      Stop : Integer := 0;
      Item : Int;

   begin
      if Width /= 0 then
         Load_Width (File, Width, Buf, Stop);
         String_Skip (Buf, Ptr);
      else
         Load_Real (File, Buf, Stop);
         Ptr := 1;
      end if;

      Item := Scan (Buf, Ptr'Access, Stop, Num, Den);
      Check_End_Of_Field (Buf, Stop, Ptr, Width);
      return Item;
   end Get;

   ----------
   -- Gets --
   ----------

   function Gets
     (From : String;
      Last : out Positive;
      Num  : Int;
      Den  : Int) return Int
   is
      Pos  : aliased Integer;
      Item : Int;

   begin
      String_Skip (From, Pos);
      Item := Scan (From, Pos'Access, From'Last, Num, Den);
      Last := Pos - 1;
      return Item;

   exception
      when Constraint_Error =>
         Last := Pos - 1;
         raise Data_Error;
   end Gets;

   ---------
   -- Put --
   ---------

   procedure Put
     (File : File_Type;
      Item : Int;
      Fore : Field;
      Aft  : Field;
      Exp  : Natural;
      Num  : Int;
      Den  : Int;
      For0 : Natural;
      Aft0 : Natural)
   is
      Buf : String (1 .. Field'Last);
      Ptr : Natural := 0;

   begin
      Set_Image (Item, Buf, Ptr, Num, Den, For0, Aft0, Fore, Aft, Exp);
      Put_Item (File, Buf (1 .. Ptr));
   end Put;

   ----------
   -- Puts --
   ----------

   procedure Puts
     (To   : out String;
      Item : Int;
      Aft  : Field;
      Exp  : Natural;
      Num  : Int;
      Den  : Int;
      For0 : Natural;
      Aft0 : Natural)
   is
      Buf  : String (1 .. Positive'Max (Field'Last, To'Length));
      Fore : Integer;
      Ptr  : Natural := 0;

   begin
      --  Compute Fore, allowing for the decimal dot and Aft digits

      Fore := To'Length - 1 - Field'Max (1, Aft);

      --  Allow for Exp and one more for E if exponent present

      if Exp /= 0 then
         Fore := Fore - 1 - Field'Max (2, Exp);
      end if;

      --  Make sure we have enough room

      if Fore < 1 + Boolean'Pos (Item < 0) then
         raise Layout_Error;
      end if;

      --  Do the conversion and check length of result

      Set_Image (Item, Buf, Ptr, Num, Den, For0, Aft0, Fore, Aft, Exp);

      if Ptr > To'Length then
         raise Layout_Error;
      else
         To := Buf (1 .. Ptr);
      end if;
   end Puts;

end Ada.Wide_Text_IO.Fixed_Aux;