File : s-vallld.adb
1 ------------------------------------------------------------------------------
2 -- --
3 -- GNAT COMPILER COMPONENTS --
4 -- --
5 -- S Y S T E M . V A L _ L L D --
6 -- --
7 -- B o d y --
8 -- --
9 -- Copyright (C) 1992-2009, 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 -- --
19 -- --
20 -- --
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 System.Val_Real; use System.Val_Real;
33
34 package body System.Val_LLD is
35
36 ----------------------------
37 -- Scan_Long_Long_Decimal --
38 ----------------------------
39
40 -- We use the floating-point circuit for now, this will be OK on a PC,
41 -- but definitely does NOT have the required precision if the longest
42 -- float type is IEEE double. This must be fixed in the future ???
43
44 function Scan_Long_Long_Decimal
45 (Str : String;
46 Ptr : not null access Integer;
47 Max : Integer;
48 Scale : Integer) return Long_Long_Integer
49 is
50 Val : Long_Long_Float;
51 begin
52 Val := Scan_Real (Str, Ptr, Max);
53 return Long_Long_Integer (Val * 10.0 ** Scale);
54 end Scan_Long_Long_Decimal;
55
56 -----------------------------
57 -- Value_Long_Long_Decimal --
58 -----------------------------
59
60 -- Again we cheat and use floating-point ???
61
62 function Value_Long_Long_Decimal
63 (Str : String;
64 Scale : Integer) return Long_Long_Integer
65 is
66 begin
67 return Long_Long_Integer (Value_Real (Str) * 10.0 ** Scale);
68 end Value_Long_Long_Decimal;
69
70 end System.Val_LLD;