306 lines
9 KiB
Ada
306 lines
9 KiB
Ada
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------------------------------------------------------------------------------
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-- --
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-- GNAT RUN-TIME COMPONENTS --
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-- --
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-- A D A . W I D E _ T E X T _ I O . M O D U L A R _ A U X --
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-- --
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-- B o d y --
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-- --
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-- Copyright (C) 1992-2014, Free Software Foundation, Inc. --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 3, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. --
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-- --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception, --
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-- version 3.1, as published by the Free Software Foundation. --
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-- --
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-- You should have received a copy of the GNU General Public License and --
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-- a copy of the GCC Runtime Library Exception along with this program; --
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-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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-- <http://www.gnu.org/licenses/>. --
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-- --
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-- GNAT was originally developed by the GNAT team at New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc. --
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-- --
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------------------------------------------------------------------------------
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with Ada.Wide_Text_IO.Generic_Aux; use Ada.Wide_Text_IO.Generic_Aux;
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with System.Img_BIU; use System.Img_BIU;
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with System.Img_Uns; use System.Img_Uns;
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with System.Img_LLB; use System.Img_LLB;
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with System.Img_LLU; use System.Img_LLU;
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with System.Img_LLW; use System.Img_LLW;
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with System.Img_WIU; use System.Img_WIU;
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with System.Val_Uns; use System.Val_Uns;
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with System.Val_LLU; use System.Val_LLU;
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package body Ada.Wide_Text_IO.Modular_Aux is
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use System.Unsigned_Types;
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-----------------------
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-- Local Subprograms --
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-----------------------
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procedure Load_Modular
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(File : File_Type;
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Buf : out String;
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Ptr : in out Natural);
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-- This is an auxiliary routine that is used to load an possibly signed
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-- modular literal value from the input file into Buf, starting at Ptr + 1.
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-- Ptr is left set to the last character stored.
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-------------
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-- Get_LLU --
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-------------
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procedure Get_LLU
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(File : File_Type;
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Item : out Long_Long_Unsigned;
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Width : Field)
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is
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Buf : String (1 .. Field'Last);
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Stop : Integer := 0;
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Ptr : aliased Integer := 1;
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begin
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if Width /= 0 then
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Load_Width (File, Width, Buf, Stop);
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String_Skip (Buf, Ptr);
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else
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Load_Modular (File, Buf, Stop);
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end if;
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Item := Scan_Long_Long_Unsigned (Buf, Ptr'Access, Stop);
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Check_End_Of_Field (Buf, Stop, Ptr, Width);
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end Get_LLU;
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-------------
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-- Get_Uns --
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-------------
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procedure Get_Uns
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(File : File_Type;
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Item : out Unsigned;
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Width : Field)
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is
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Buf : String (1 .. Field'Last);
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Stop : Integer := 0;
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Ptr : aliased Integer := 1;
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begin
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if Width /= 0 then
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Load_Width (File, Width, Buf, Stop);
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String_Skip (Buf, Ptr);
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else
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Load_Modular (File, Buf, Stop);
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end if;
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Item := Scan_Unsigned (Buf, Ptr'Access, Stop);
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Check_End_Of_Field (Buf, Stop, Ptr, Width);
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end Get_Uns;
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--------------
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-- Gets_LLU --
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--------------
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procedure Gets_LLU
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(From : String;
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Item : out Long_Long_Unsigned;
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Last : out Positive)
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is
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Pos : aliased Integer;
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begin
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String_Skip (From, Pos);
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Item := Scan_Long_Long_Unsigned (From, Pos'Access, From'Last);
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Last := Pos - 1;
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exception
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when Constraint_Error =>
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raise Data_Error;
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end Gets_LLU;
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--------------
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-- Gets_Uns --
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--------------
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procedure Gets_Uns
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(From : String;
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Item : out Unsigned;
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Last : out Positive)
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is
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Pos : aliased Integer;
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begin
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String_Skip (From, Pos);
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Item := Scan_Unsigned (From, Pos'Access, From'Last);
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Last := Pos - 1;
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exception
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when Constraint_Error =>
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raise Data_Error;
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end Gets_Uns;
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------------------
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-- Load_Modular --
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------------------
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procedure Load_Modular
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(File : File_Type;
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Buf : out String;
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Ptr : in out Natural)
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is
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Hash_Loc : Natural;
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Loaded : Boolean;
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begin
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Load_Skip (File);
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-- Note: it is a bit strange to allow a minus sign here, but it seems
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-- consistent with the general behavior expected by the ACVC tests
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-- which is to scan past junk and then signal data error, see ACVC
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-- test CE3704F, case (6), which is for signed integer exponents,
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-- which seems a similar case.
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Load (File, Buf, Ptr, '+', '-');
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Load_Digits (File, Buf, Ptr, Loaded);
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if Loaded then
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-- Deal with based case. We recognize either the standard '#' or the
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-- allowed alternative replacement ':' (see RM J.2(3)).
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Load (File, Buf, Ptr, '#', ':', Loaded);
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if Loaded then
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Hash_Loc := Ptr;
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Load_Extended_Digits (File, Buf, Ptr);
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Load (File, Buf, Ptr, Buf (Hash_Loc));
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end if;
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Load (File, Buf, Ptr, 'E', 'e', Loaded);
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if Loaded then
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-- Note: it is strange to allow a minus sign, since the syntax
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-- does not, but that is what ACVC test CE3704F, case (6) wants
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-- for the signed case, and there seems no good reason to treat
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-- exponents differently for the signed and unsigned cases.
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Load (File, Buf, Ptr, '+', '-');
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Load_Digits (File, Buf, Ptr);
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end if;
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end if;
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end Load_Modular;
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-------------
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-- Put_LLU --
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-------------
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procedure Put_LLU
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(File : File_Type;
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Item : Long_Long_Unsigned;
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Width : Field;
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Base : Number_Base)
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is
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Buf : String (1 .. Field'Last);
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Ptr : Natural := 0;
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begin
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if Base = 10 and then Width = 0 then
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Set_Image_Long_Long_Unsigned (Item, Buf, Ptr);
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elsif Base = 10 then
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Set_Image_Width_Long_Long_Unsigned (Item, Width, Buf, Ptr);
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else
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Set_Image_Based_Long_Long_Unsigned (Item, Base, Width, Buf, Ptr);
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end if;
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Put_Item (File, Buf (1 .. Ptr));
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end Put_LLU;
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-------------
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-- Put_Uns --
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-------------
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procedure Put_Uns
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(File : File_Type;
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Item : Unsigned;
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Width : Field;
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Base : Number_Base)
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is
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Buf : String (1 .. Field'Last);
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Ptr : Natural := 0;
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begin
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if Base = 10 and then Width = 0 then
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Set_Image_Unsigned (Item, Buf, Ptr);
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elsif Base = 10 then
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Set_Image_Width_Unsigned (Item, Width, Buf, Ptr);
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else
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Set_Image_Based_Unsigned (Item, Base, Width, Buf, Ptr);
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end if;
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Put_Item (File, Buf (1 .. Ptr));
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end Put_Uns;
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--------------
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-- Puts_LLU --
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--------------
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procedure Puts_LLU
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(To : out String;
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Item : Long_Long_Unsigned;
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Base : Number_Base)
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is
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Buf : String (1 .. Field'Last);
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Ptr : Natural := 0;
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begin
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if Base = 10 then
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Set_Image_Width_Long_Long_Unsigned (Item, To'Length, Buf, Ptr);
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else
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Set_Image_Based_Long_Long_Unsigned (Item, Base, To'Length, Buf, Ptr);
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end if;
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if Ptr > To'Length then
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raise Layout_Error;
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else
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To (To'First .. To'First + Ptr - 1) := Buf (1 .. Ptr);
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end if;
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end Puts_LLU;
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--------------
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-- Puts_Uns --
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--------------
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procedure Puts_Uns
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(To : out String;
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Item : Unsigned;
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Base : Number_Base)
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is
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Buf : String (1 .. Field'Last);
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Ptr : Natural := 0;
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begin
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if Base = 10 then
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Set_Image_Width_Unsigned (Item, To'Length, Buf, Ptr);
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else
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Set_Image_Based_Unsigned (Item, Base, To'Length, Buf, Ptr);
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end if;
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if Ptr > To'Length then
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raise Layout_Error;
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else
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To (To'First .. To'First + Ptr - 1) := Buf (1 .. Ptr);
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end if;
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end Puts_Uns;
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end Ada.Wide_Text_IO.Modular_Aux;
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