------------------------------------------------------------------------------ -- -- -- GNAT RUN-TIME COMPONENTS -- -- -- -- A D A . W I D E _ T E X T _ I O . F L O A T _ I O -- -- -- -- B o d y -- -- -- -- Copyright (C) 1992-2020, 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 -- -- . -- -- -- -- GNAT was originally developed by the GNAT team at New York University. -- -- Extensive contributions were provided by Ada Core Technologies Inc. -- -- -- ------------------------------------------------------------------------------ with Ada.Wide_Text_IO.Float_Aux; with System.Val_Flt; use System.Val_Flt; with System.Val_LFlt; use System.Val_LFlt; with System.Val_LLF; use System.Val_LLF; with System.WCh_Con; use System.WCh_Con; with System.WCh_WtS; use System.WCh_WtS; package body Ada.Wide_Text_IO.Float_IO is package Aux_Float is new Ada.Wide_Text_IO.Float_Aux (Float, Scan_Float); package Aux_Long_Float is new Ada.Wide_Text_IO.Float_Aux (Long_Float, Scan_Long_Float); package Aux_Long_Long_Float is new Ada.Wide_Text_IO.Float_Aux (Long_Long_Float, Scan_Long_Long_Float); -- Throughout this generic body, we distinguish between the case where type -- Float is OK, where type Long_Float is OK and where type Long_Long_Float -- is needed. These boolean constants are used to test for this, such that -- only code for the relevant case is included in the instance. OK_Float : constant Boolean := Num'Base'Digits <= Float'Digits; OK_Long_Float : constant Boolean := Num'Base'Digits <= Long_Float'Digits; --------- -- Get -- --------- procedure Get (File : File_Type; Item : out Num; Width : Field := 0) is pragma Unsuppress (Range_Check); begin if OK_Float then Aux_Float.Get (File, Float (Item), Width); elsif OK_Long_Float then Aux_Long_Float.Get (File, Long_Float (Item), Width); else Aux_Long_Long_Float.Get (File, Long_Long_Float (Item), Width); end if; -- In the case where the type is unconstrained (e.g. Standard'Float), -- the above conversion may result in an infinite value, which is -- normally fine for a conversion, but in this case, we want to treat -- that as a data error. if not Item'Valid then raise Data_Error; end if; exception when Constraint_Error => raise Data_Error; end Get; procedure Get (Item : out Num; Width : Field := 0) is begin Get (Current_In, Item, Width); end Get; procedure Get (From : Wide_String; Item : out Num; Last : out Positive) is pragma Unsuppress (Range_Check); S : constant String := Wide_String_To_String (From, WCEM_Upper); -- String on which we do the actual conversion. Note that the method -- used for wide character encoding is irrelevant, since if there is -- a character outside the Standard.Character range then the call to -- Aux.Gets will raise Data_Error in any case. begin if OK_Float then Aux_Float.Gets (S, Float (Item), Last); elsif OK_Long_Float then Aux_Long_Float.Gets (S, Long_Float (Item), Last); else Aux_Long_Long_Float.Gets (S, Long_Long_Float (Item), Last); end if; -- In the case where the type is unconstrained (e.g. Standard'Float), -- the above conversion may result in an infinite value, which is -- normally fine for a conversion, but in this case, we want to treat -- that as a data error. if not Item'Valid then raise Data_Error; end if; exception when Constraint_Error => raise Data_Error; end Get; --------- -- Put -- --------- procedure Put (File : File_Type; Item : Num; Fore : Field := Default_Fore; Aft : Field := Default_Aft; Exp : Field := Default_Exp) is begin if OK_Float then Aux_Float.Put (File, Float (Item), Fore, Aft, Exp); elsif OK_Long_Float then Aux_Long_Float.Put (File, Long_Float (Item), Fore, Aft, Exp); else Aux_Long_Long_Float.Put (File, Long_Long_Float (Item), Fore, Aft, Exp); end if; end Put; procedure Put (Item : Num; Fore : Field := Default_Fore; Aft : Field := Default_Aft; Exp : Field := Default_Exp) is begin Put (Current_Out, Item, Fore, Aft, Exp); end Put; procedure Put (To : out Wide_String; Item : Num; Aft : Field := Default_Aft; Exp : Field := Default_Exp) is S : String (To'First .. To'Last); begin if OK_Float then Aux_Float.Puts (S, Float (Item), Aft, Exp); elsif OK_Long_Float then Aux_Long_Float.Puts (S, Long_Float (Item), Aft, Exp); else Aux_Long_Long_Float.Puts (S, Long_Long_Float (Item), Aft, Exp); end if; for J in S'Range loop To (J) := Wide_Character'Val (Character'Pos (S (J))); end loop; end Put; end Ada.Wide_Text_IO.Float_IO;