| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT RUN-TIME COMPONENTS -- |
| -- -- |
| -- A D A . T E X T _ I O . F L O A T _ A U X -- |
| -- -- |
| -- B o d y -- |
| -- -- |
| -- Copyright (C) 1992-2014, Free Software Foundation, Inc. -- |
| -- -- |
| -- GNAT is free software; you can redistribute it and/or modify it under -- |
| -- terms of the GNU General Public License as published by the Free Soft- -- |
| -- ware Foundation; either version 3, or (at your option) any later ver- -- |
| -- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- |
| -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- |
| -- or FITNESS FOR A PARTICULAR PURPOSE. -- |
| -- -- |
| -- As a special exception under Section 7 of GPL version 3, you are granted -- |
| -- additional permissions described in the GCC Runtime Library Exception, -- |
| -- version 3.1, as published by the Free Software Foundation. -- |
| -- -- |
| -- You should have received a copy of the GNU General Public License and -- |
| -- a copy of the GCC Runtime Library Exception along with this program; -- |
| -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- |
| -- <http://www.gnu.org/licenses/>. -- |
| -- -- |
| -- GNAT was originally developed by the GNAT team at New York University. -- |
| -- Extensive contributions were provided by Ada Core Technologies Inc. -- |
| -- -- |
| ------------------------------------------------------------------------------ |
| |
| with Ada.Text_IO.Generic_Aux; use Ada.Text_IO.Generic_Aux; |
| |
| with System.Img_Real; use System.Img_Real; |
| with System.Val_Real; use System.Val_Real; |
| |
| package body Ada.Text_IO.Float_Aux is |
| |
| --------- |
| -- Get -- |
| --------- |
| |
| procedure Get |
| (File : File_Type; |
| Item : out Long_Long_Float; |
| Width : Field) |
| is |
| Buf : String (1 .. Field'Last); |
| Stop : Integer := 0; |
| Ptr : aliased Integer := 1; |
| |
| begin |
| if Width /= 0 then |
| Load_Width (File, Width, Buf, Stop); |
| String_Skip (Buf, Ptr); |
| else |
| Load_Real (File, Buf, Stop); |
| end if; |
| |
| Item := Scan_Real (Buf, Ptr'Access, Stop); |
| |
| Check_End_Of_Field (Buf, Stop, Ptr, Width); |
| end Get; |
| |
| ---------- |
| -- Gets -- |
| ---------- |
| |
| procedure Gets |
| (From : String; |
| Item : out Long_Long_Float; |
| Last : out Positive) |
| is |
| Pos : aliased Integer; |
| |
| begin |
| String_Skip (From, Pos); |
| Item := Scan_Real (From, Pos'Access, From'Last); |
| Last := Pos - 1; |
| |
| exception |
| when Constraint_Error => |
| raise Data_Error; |
| end Gets; |
| |
| --------------- |
| -- Load_Real -- |
| --------------- |
| |
| procedure Load_Real |
| (File : File_Type; |
| Buf : out String; |
| Ptr : in out Natural) |
| is |
| Loaded : Boolean; |
| |
| begin |
| -- Skip initial blanks, and load possible sign |
| |
| Load_Skip (File); |
| Load (File, Buf, Ptr, '+', '-'); |
| |
| -- Case of .nnnn |
| |
| Load (File, Buf, Ptr, '.', Loaded); |
| |
| if Loaded then |
| Load_Digits (File, Buf, Ptr, Loaded); |
| |
| -- Hopeless junk if no digits loaded |
| |
| if not Loaded then |
| return; |
| end if; |
| |
| -- Otherwise must have digits to start |
| |
| else |
| Load_Digits (File, Buf, Ptr, Loaded); |
| |
| -- Hopeless junk if no digits loaded |
| |
| if not Loaded then |
| return; |
| end if; |
| |
| -- Based cases. We recognize either the standard '#' or the |
| -- allowed alternative replacement ':' (see RM J.2(3)). |
| |
| Load (File, Buf, Ptr, '#', ':', Loaded); |
| |
| if Loaded then |
| |
| -- Case of nnn#.xxx# |
| |
| Load (File, Buf, Ptr, '.', Loaded); |
| |
| if Loaded then |
| Load_Extended_Digits (File, Buf, Ptr); |
| Load (File, Buf, Ptr, '#', ':'); |
| |
| -- Case of nnn#xxx.[xxx]# or nnn#xxx# |
| |
| else |
| Load_Extended_Digits (File, Buf, Ptr); |
| Load (File, Buf, Ptr, '.', Loaded); |
| |
| if Loaded then |
| Load_Extended_Digits (File, Buf, Ptr); |
| end if; |
| |
| -- As usual, it seems strange to allow mixed base characters, |
| -- but that is what ACVC tests expect, see CE3804M, case (3). |
| |
| Load (File, Buf, Ptr, '#', ':'); |
| end if; |
| |
| -- Case of nnn.[nnn] or nnn |
| |
| else |
| -- Prevent the potential processing of '.' in cases where the |
| -- initial digits have a trailing underscore. |
| |
| if Buf (Ptr) = '_' then |
| return; |
| end if; |
| |
| Load (File, Buf, Ptr, '.', Loaded); |
| |
| if Loaded then |
| Load_Digits (File, Buf, Ptr); |
| end if; |
| end if; |
| end if; |
| |
| -- Deal with exponent |
| |
| Load (File, Buf, Ptr, 'E', 'e', Loaded); |
| |
| if Loaded then |
| Load (File, Buf, Ptr, '+', '-'); |
| Load_Digits (File, Buf, Ptr); |
| end if; |
| end Load_Real; |
| |
| --------- |
| -- Put -- |
| --------- |
| |
| procedure Put |
| (File : File_Type; |
| Item : Long_Long_Float; |
| Fore : Field; |
| Aft : Field; |
| Exp : Field) |
| is |
| Buf : String (1 .. 3 * Field'Last + 2); |
| Ptr : Natural := 0; |
| |
| begin |
| Set_Image_Real (Item, Buf, Ptr, Fore, Aft, Exp); |
| Put_Item (File, Buf (1 .. Ptr)); |
| end Put; |
| |
| ---------- |
| -- Puts -- |
| ---------- |
| |
| procedure Puts |
| (To : out String; |
| Item : Long_Long_Float; |
| Aft : Field; |
| Exp : Field) |
| is |
| Buf : String (1 .. 3 * Field'Last + 2); |
| Ptr : Natural := 0; |
| |
| begin |
| Set_Image_Real (Item, Buf, Ptr, Fore => 1, Aft => Aft, Exp => Exp); |
| |
| if Ptr > To'Length then |
| raise Layout_Error; |
| |
| else |
| for J in 1 .. Ptr loop |
| To (To'Last - Ptr + J) := Buf (J); |
| end loop; |
| |
| for J in To'First .. To'Last - Ptr loop |
| To (J) := ' '; |
| end loop; |
| end if; |
| end Puts; |
| |
| end Ada.Text_IO.Float_Aux; |
