1 ------------------------------------------------------------------------------
3 -- GNAT RUN-TIME COMPONENTS --
5 -- A D A . T E X T _ I O . F L O A T _ A U X --
10 -- Copyright (C) 1992-2001 Free Software Foundation, Inc. --
12 -- GNAT is free software; you can redistribute it and/or modify it under --
13 -- terms of the GNU General Public License as published by the Free Soft- --
14 -- ware Foundation; either version 2, or (at your option) any later ver- --
15 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
16 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
17 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
18 -- for more details. You should have received a copy of the GNU General --
19 -- Public License distributed with GNAT; see file COPYING. If not, write --
20 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
21 -- MA 02111-1307, USA. --
23 -- As a special exception, if other files instantiate generics from this --
24 -- unit, or you link this unit with other files to produce an executable, --
25 -- this unit does not by itself cause the resulting executable to be --
26 -- covered by the GNU General Public License. This exception does not --
27 -- however invalidate any other reasons why the executable file might be --
28 -- covered by the GNU Public License. --
30 -- GNAT was originally developed by the GNAT team at New York University. --
31 -- Extensive contributions were provided by Ada Core Technologies Inc. --
33 ------------------------------------------------------------------------------
35 with Ada.Text_IO.Generic_Aux; use Ada.Text_IO.Generic_Aux;
37 with System.Img_Real; use System.Img_Real;
38 with System.Val_Real; use System.Val_Real;
40 package body Ada.Text_IO.Float_Aux is
48 Item : out Long_Long_Float;
51 Buf : String (1 .. Field'Last);
53 Ptr : aliased Integer := 1;
57 Load_Width (File, Width, Buf, Stop);
58 String_Skip (Buf, Ptr);
60 Load_Real (File, Buf, Stop);
63 Item := Scan_Real (Buf, Ptr'Access, Stop);
65 Check_End_Of_Field (Buf, Stop, Ptr, Width);
74 Item : out Long_Long_Float;
77 Pos : aliased Integer;
80 String_Skip (From, Pos);
81 Item := Scan_Real (From, Pos'Access, From'Last);
85 when Constraint_Error =>
102 -- Skip initial blanks, and load possible sign
105 Load (File, Buf, Ptr, '+', '-');
109 Load (File, Buf, Ptr, '.', Loaded);
112 Load_Digits (File, Buf, Ptr, Loaded);
114 -- Hopeless junk if no digits loaded
120 -- Otherwise must have digits to start
123 Load_Digits (File, Buf, Ptr, Loaded);
125 -- Hopeless junk if no digits loaded
133 Load (File, Buf, Ptr, '#', ':', Loaded);
139 Load (File, Buf, Ptr, '.', Loaded);
142 Load_Extended_Digits (File, Buf, Ptr);
144 -- Case of nnn#xxx.[xxx]# or nnn#xxx#
147 Load_Extended_Digits (File, Buf, Ptr);
148 Load (File, Buf, Ptr, '.', Loaded);
151 Load_Extended_Digits (File, Buf, Ptr);
154 -- As usual, it seems strange to allow mixed base characters,
155 -- but that is what ACVC tests expect, see CE3804M, case (3).
157 Load (File, Buf, Ptr, '#', ':');
160 -- Case of nnn.[nnn] or nnn
163 Load (File, Buf, Ptr, '.', Loaded);
166 Load_Digits (File, Buf, Ptr);
171 -- Deal with exponent
173 Load (File, Buf, Ptr, 'E', 'e', Loaded);
176 Load (File, Buf, Ptr, '+', '-');
177 Load_Digits (File, Buf, Ptr);
186 (File : in File_Type;
187 Item : in Long_Long_Float;
192 Buf : String (1 .. 3 * Field'Last + 2);
196 Set_Image_Real (Item, Buf, Ptr, Fore, Aft, Exp);
197 Put_Item (File, Buf (1 .. Ptr));
206 Item : in Long_Long_Float;
210 Buf : String (1 .. 3 * Field'Last + 2);
214 Set_Image_Real (Item, Buf, Ptr, Fore => 1, Aft => Aft, Exp => Exp);
216 if Ptr > To'Length then
220 for J in 1 .. Ptr loop
221 To (To'Last - Ptr + J) := Buf (J);
224 for J in To'First .. To'Last - Ptr loop
230 end Ada.Text_IO.Float_Aux;