1 ------------------------------------------------------------------------------
3 -- GNAT RUN-TIME COMPONENTS --
5 -- A D A . W I D E _ W I D E _ T E X T _ I O . F L O A T _ A U X --
9 -- Copyright (C) 1992-2009, Free Software Foundation, Inc. --
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. --
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. --
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/>. --
27 -- GNAT was originally developed by the GNAT team at New York University. --
28 -- Extensive contributions were provided by Ada Core Technologies Inc. --
30 ------------------------------------------------------------------------------
32 with Ada.Wide_Wide_Text_IO.Generic_Aux; use Ada.Wide_Wide_Text_IO.Generic_Aux;
34 with System.Img_Real; use System.Img_Real;
35 with System.Val_Real; use System.Val_Real;
37 package body Ada.Wide_Wide_Text_IO.Float_Aux is
45 Item : out Long_Long_Float;
48 Buf : String (1 .. Field'Last);
50 Ptr : aliased Integer := 1;
54 Load_Width (File, Width, Buf, Stop);
55 String_Skip (Buf, Ptr);
57 Load_Real (File, Buf, Stop);
60 Item := Scan_Real (Buf, Ptr'Access, Stop);
62 Check_End_Of_Field (Buf, Stop, Ptr, Width);
71 Item : out Long_Long_Float;
74 Pos : aliased Integer;
77 String_Skip (From, Pos);
78 Item := Scan_Real (From, Pos'Access, From'Last);
82 when Constraint_Error =>
98 -- Skip initial blanks and load possible sign
101 Load (File, Buf, Ptr, '+', '-');
105 Load (File, Buf, Ptr, '.', Loaded);
108 Load_Digits (File, Buf, Ptr, Loaded);
110 -- Hopeless junk if no digits loaded
116 -- Otherwise must have digits to start
119 Load_Digits (File, Buf, Ptr, Loaded);
121 -- Hopeless junk if no digits loaded
129 Load (File, Buf, Ptr, '#', ':', Loaded);
135 Load (File, Buf, Ptr, '.', Loaded);
138 Load_Extended_Digits (File, Buf, Ptr);
139 Load (File, Buf, Ptr, '#', ':');
141 -- Case of nnn#xxx.[xxx]# or nnn#xxx#
144 Load_Extended_Digits (File, Buf, Ptr);
145 Load (File, Buf, Ptr, '.', Loaded);
148 Load_Extended_Digits (File, Buf, Ptr);
151 -- As usual, it seems strange to allow mixed base characters,
152 -- but that is what ACVC tests expect, see CE3804M, case (3).
154 Load (File, Buf, Ptr, '#', ':');
157 -- Case of nnn.[nnn] or nnn
160 -- Prevent the potential processing of '.' in cases where the
161 -- initial digits have a trailing underscore.
163 if Buf (Ptr) = '_' then
167 Load (File, Buf, Ptr, '.', Loaded);
170 Load_Digits (File, Buf, Ptr);
175 -- Deal with exponent
177 Load (File, Buf, Ptr, 'E', 'e', Loaded);
180 Load (File, Buf, Ptr, '+', '-');
181 Load_Digits (File, Buf, Ptr);
191 Item : Long_Long_Float;
196 Buf : String (1 .. Field'Last);
200 Set_Image_Real (Item, Buf, Ptr, Fore, Aft, Exp);
201 Put_Item (File, Buf (1 .. Ptr));
210 Item : Long_Long_Float;
214 Buf : String (1 .. Field'Last);
218 Set_Image_Real (Item, Buf, Ptr, Fore => 1, Aft => Aft, Exp => Exp);
220 if Ptr > To'Length then
224 for J in 1 .. Ptr loop
225 To (To'Last - Ptr + J) := Buf (J);
228 for J in To'First .. To'Last - Ptr loop
234 end Ada.Wide_Wide_Text_IO.Float_Aux;