gcc/ada/libgnat/a-tiflau.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                        GNAT RUN-TIME COMPONENTS                          --
   4 --                                                                          --
   5 --                A D A . T E X T _ I O . F L O A T _ A U X                 --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --          Copyright (C) 1992-2023, Free Software Foundation, Inc.         --
  10 --                                                                          --
  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 3,  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.                                     --
  17 --                                                                          --
  18 -- As a special exception under Section 7 of GPL version 3, you are granted --
  19 -- additional permissions described in the GCC Runtime Library Exception,   --
  20 -- version 3.1, as published by the Free Software Foundation.               --
  21 --                                                                          --
  22 -- You should have received a copy of the GNU General Public License and    --
  23 -- a copy of the GCC Runtime Library Exception along with this program;     --
  24 -- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
  25 -- <http://www.gnu.org/licenses/>.                                          --
  26 --                                                                          --
  27 -- GNAT was originally developed  by the GNAT team at  New York University. --
  28 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  29 --                                                                          --
  30 ------------------------------------------------------------------------------
  31
  32 with Ada.Text_IO.Generic_Aux; use Ada.Text_IO.Generic_Aux;
  33
  34 with System.Img_Util; use System.Img_Util;
  35
  36 package body Ada.Text_IO.Float_Aux is
  37
  38    ---------
  39    -- Get --
  40    ---------
  41
  42    procedure Get
  43      (File  : File_Type;
  44       Item  : out Num;
  45       Width : Field)
  46    is
  47       Buf  : String (1 .. Field'Last);
  48       Stop : Integer := 0;
  49       Ptr  : aliased Integer;
  50
  51    begin
  52       if Width /= 0 then
  53          Load_Width (File, Width, Buf, Stop);
  54          String_Skip (Buf, Ptr);
  55       else
  56          Load_Real (File, Buf, Stop);
  57          Ptr := 1;
  58       end if;
  59
  60       Item := Scan (Buf, Ptr'Access, Stop);
  61       Check_End_Of_Field (Buf, Stop, Ptr, Width);
  62    end Get;
  63
  64    ----------
  65    -- Gets --
  66    ----------
  67
  68    procedure Gets
  69      (From : String;
  70       Item : out Num;
  71       Last : out Positive)
  72    is
  73       Pos : aliased Integer;
  74
  75    begin
  76       String_Skip (From, Pos);
  77       Item := Scan (From, Pos'Access, From'Last);
  78       Last := Pos - 1;
  79
  80    exception
  81       when Constraint_Error => raise Data_Error;
  82    end Gets;
  83
  84    ---------
  85    -- Put --
  86    ---------
  87
  88    procedure Put
  89      (File : File_Type;
  90       Item : Num;
  91       Fore : Field;
  92       Aft  : Field;
  93       Exp  : Field)
  94    is
  95       Buf : String (1 .. Max_Real_Image_Length);
  96       Ptr : Natural := 0;
  97
  98    begin
  99       Set_Image (Item, Buf, Ptr, Fore, Aft, Exp);
 100       Put_Item (File, Buf (1 .. Ptr));
 101    end Put;
 102
 103    ----------
 104    -- Puts --
 105    ----------
 106
 107    procedure Puts
 108      (To   : out String;
 109       Item : Num;
 110       Aft  : Field;
 111       Exp  : Field)
 112    is
 113       Buf : String (1 .. Max_Real_Image_Length);
 114       Ptr : Natural := 0;
 115
 116    begin
 117       Set_Image (Item, Buf, Ptr, Fore => 1, Aft => Aft, Exp => Exp);
 118
 119       if Ptr > To'Length then
 120          raise Layout_Error;
 121
 122       else
 123          for J in 1 .. Ptr loop
 124             To (To'Last - Ptr + J) := Buf (J);
 125          end loop;
 126
 127          for J in To'First .. To'Last - Ptr loop
 128             To (J) := ' ';
 129          end loop;
 130       end if;
 131    end Puts;
 132
 133 end Ada.Text_IO.Float_Aux;