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authorBen Cheng <bccheng@google.com>2012-10-01 10:30:31 -0700
committerBen Cheng <bccheng@google.com>2012-10-01 10:30:31 -0700
commit82bcbebce43f0227f506d75a5b764b6847041bae (patch)
treefe9f8597b48a430c4daeb5123e3e8eb28e6f9da9 /gcc-4.7/gcc/ada/a-ztdeau.adb
parent3c052de3bb16ac53b6b6ed659ec7557eb84c7590 (diff)
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Initial check-in of gcc 4.7.2.
Change-Id: I4a2f5a921c21741a0e18bda986d77e5f1bef0365
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+------------------------------------------------------------------------------
+-- --
+-- GNAT RUN-TIME COMPONENTS --
+-- --
+-- A D A . W I D E _ 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 --
+-- <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.Wide_Wide_Text_IO.Generic_Aux; use Ada.Wide_Wide_Text_IO.Generic_Aux;
+with Ada.Wide_Wide_Text_IO.Float_Aux; use Ada.Wide_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_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_Wide_Text_IO.Decimal_Aux;