Mercurial > hg > CbC > CbC_gcc
comparison gcc/ada/libgnat/s-valdec.adb @ 111:04ced10e8804
gcc 7
| author | kono |
|---|---|
| date | Fri, 27 Oct 2017 22:46:09 +0900 |
| parents | |
| children | 84e7813d76e9 |
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| 68:561a7518be6b | 111:04ced10e8804 |
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| 1 ------------------------------------------------------------------------------ | |
| 2 -- -- | |
| 3 -- GNAT COMPILER COMPONENTS -- | |
| 4 -- -- | |
| 5 -- S Y S T E M . V A L _ D E C -- | |
| 6 -- -- | |
| 7 -- B o d y -- | |
| 8 -- -- | |
| 9 -- Copyright (C) 1992-2017, 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 System.Val_Real; use System.Val_Real; | |
| 33 | |
| 34 package body System.Val_Dec is | |
| 35 | |
| 36 ------------------ | |
| 37 -- Scan_Decimal -- | |
| 38 ------------------ | |
| 39 | |
| 40 -- For decimal types where Size < Integer'Size, it is fine to use | |
| 41 -- the floating-point circuit, since it certainly has sufficient | |
| 42 -- precision for any reasonable hardware, and we just don't support | |
| 43 -- things on junk hardware. | |
| 44 | |
| 45 function Scan_Decimal | |
| 46 (Str : String; | |
| 47 Ptr : not null access Integer; | |
| 48 Max : Integer; | |
| 49 Scale : Integer) return Integer | |
| 50 is | |
| 51 Val : Long_Long_Float; | |
| 52 begin | |
| 53 Val := Scan_Real (Str, Ptr, Max); | |
| 54 return Integer (Val * 10.0 ** Scale); | |
| 55 end Scan_Decimal; | |
| 56 | |
| 57 ------------------- | |
| 58 -- Value_Decimal -- | |
| 59 ------------------- | |
| 60 | |
| 61 -- Again, we use the real circuit for this purpose | |
| 62 | |
| 63 function Value_Decimal (Str : String; Scale : Integer) return Integer is | |
| 64 begin | |
| 65 return Integer (Value_Real (Str) * 10.0 ** Scale); | |
| 66 end Value_Decimal; | |
| 67 | |
| 68 end System.Val_Dec; |