------------------------------------------------------------------------------ -- -- -- GNAT RUN-TIME COMPONENTS -- -- -- -- A D A . W I D E _ T E X T _ I O . D E C I M A L _ A U X -- -- -- -- B o d y -- -- -- -- Copyright (C) 1992-2009, 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.Generic_Aux; use Ada.Wide_Text_IO.Generic_Aux; with Ada.Wide_Text_IO.Float_Aux; use Ada.Wide_Text_IO.Float_Aux; with System.Img_Dec; use System.Img_Dec; with System.Img_LLD; use System.Img_LLD; with System.Val_Dec; use System.Val_Dec; with System.Val_LLD; use System.Val_LLD; package body Ada.Wide_Text_IO.Decimal_Aux is ------------- -- Get_Dec -- ------------- function Get_Dec (File : File_Type; Width : Field; Scale : Integer) return Integer is Buf : String (1 .. Field'Last); Ptr : aliased Integer; Stop : Integer := 0; Item : Integer; begin if Width /= 0 then Load_Width (File, Width, Buf, Stop); String_Skip (Buf, Ptr); else Load_Real (File, Buf, Stop); Ptr := 1; end if; Item := Scan_Decimal (Buf, Ptr'Access, Stop, Scale); Check_End_Of_Field (Buf, Stop, Ptr, Width); return Item; end Get_Dec; ------------- -- Get_LLD -- ------------- function Get_LLD (File : File_Type; Width : Field; Scale : Integer) return Long_Long_Integer is Buf : String (1 .. Field'Last); Ptr : aliased Integer; Stop : Integer := 0; Item : Long_Long_Integer; begin if Width /= 0 then Load_Width (File, Width, Buf, Stop); String_Skip (Buf, Ptr); else Load_Real (File, Buf, Stop); Ptr := 1; end if; Item := Scan_Long_Long_Decimal (Buf, Ptr'Access, Stop, Scale); Check_End_Of_Field (Buf, Stop, Ptr, Width); return Item; end Get_LLD; -------------- -- Gets_Dec -- -------------- function Gets_Dec (From : String; Last : not null access Positive; Scale : Integer) return Integer is Pos : aliased Integer; Item : Integer; begin String_Skip (From, Pos); Item := Scan_Decimal (From, Pos'Access, From'Last, Scale); Last.all := Pos - 1; return Item; exception when Constraint_Error => Last.all := Pos - 1; raise Data_Error; end Gets_Dec; -------------- -- Gets_LLD -- -------------- function Gets_LLD (From : String; Last : not null access Positive; Scale : Integer) return Long_Long_Integer is Pos : aliased Integer; Item : Long_Long_Integer; begin String_Skip (From, Pos); Item := Scan_Long_Long_Decimal (From, Pos'Access, From'Last, Scale); Last.all := Pos - 1; return Item; exception when Constraint_Error => Last.all := Pos - 1; raise Data_Error; end Gets_LLD; ------------- -- Put_Dec -- ------------- procedure Put_Dec (File : File_Type; Item : Integer; Fore : Field; Aft : Field; Exp : Field; Scale : Integer) is Buf : String (1 .. Field'Last); Ptr : Natural := 0; begin Set_Image_Decimal (Item, Buf, Ptr, Scale, Fore, Aft, Exp); Put_Item (File, Buf (1 .. Ptr)); end Put_Dec; ------------- -- Put_LLD -- ------------- procedure Put_LLD (File : File_Type; Item : Long_Long_Integer; Fore : Field; Aft : Field; Exp : Field; Scale : Integer) is Buf : String (1 .. Field'Last); Ptr : Natural := 0; begin Set_Image_Long_Long_Decimal (Item, Buf, Ptr, Scale, Fore, Aft, Exp); Put_Item (File, Buf (1 .. Ptr)); end Put_LLD; -------------- -- Puts_Dec -- -------------- procedure Puts_Dec (To : out String; Item : Integer; Aft : Field; Exp : Field; Scale : Integer) is Buf : String (1 .. Field'Last); Fore : Integer; Ptr : Natural := 0; begin -- Compute Fore, allowing for Aft digits and the decimal dot Fore := To'Length - Field'Max (1, Aft) - 1; -- Allow for Exp and two more for E+ or E- if exponent present if Exp /= 0 then Fore := Fore - 2 - Exp; end if; -- Make sure we have enough room if Fore < 1 then raise Layout_Error; end if; -- Do the conversion and check length of result Set_Image_Decimal (Item, Buf, Ptr, Scale, Fore, Aft, Exp); if Ptr > To'Length then raise Layout_Error; else To := Buf (1 .. Ptr); end if; end Puts_Dec; -------------- -- Puts_Dec -- -------------- procedure Puts_LLD (To : out String; Item : Long_Long_Integer; Aft : Field; Exp : Field; Scale : Integer) is Buf : String (1 .. Field'Last); Fore : Integer; Ptr : Natural := 0; begin Fore := (if Exp = 0 then To'Length - 1 - Aft else To'Length - 2 - Aft - Exp); if Fore < 1 then raise Layout_Error; end if; Set_Image_Long_Long_Decimal (Item, Buf, Ptr, Scale, Fore, Aft, Exp); if Ptr > To'Length then raise Layout_Error; else To := Buf (1 .. Ptr); end if; end Puts_LLD; end Ada.Wide_Text_IO.Decimal_Aux;