203 lines
6.1 KiB
Ada
203 lines
6.1 KiB
Ada
------------------------------------------------------------------------------
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-- --
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-- GNAT RUN-TIME COMPONENTS --
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-- --
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-- A D A . T E X T _ I O . C O M P L E X _ 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) 1992-2009, 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.Text_IO.Generic_Aux; use Ada.Text_IO.Generic_Aux;
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with Ada.Text_IO.Float_Aux;
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with System.Img_Real; use System.Img_Real;
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package body Ada.Text_IO.Complex_Aux is
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package Aux renames Ada.Text_IO.Float_Aux;
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---------
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-- Get --
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---------
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procedure Get
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(File : File_Type;
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ItemR : out Long_Long_Float;
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ItemI : out Long_Long_Float;
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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;
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Paren : Boolean := False;
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begin
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-- General note for following code, exceptions from the calls to
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-- Get for components of the complex value are propagated.
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if Width /= 0 then
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Load_Width (File, Width, Buf, Stop);
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Gets (Buf (1 .. Stop), ItemR, ItemI, Ptr);
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for J in Ptr + 1 .. Stop loop
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if not Is_Blank (Buf (J)) then
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raise Data_Error;
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end if;
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end loop;
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-- Case of width = 0
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else
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Load_Skip (File);
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Ptr := 0;
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Load (File, Buf, Ptr, '(', Paren);
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Aux.Get (File, ItemR, 0);
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Load_Skip (File);
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Load (File, Buf, Ptr, ',');
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Aux.Get (File, ItemI, 0);
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if Paren then
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Load_Skip (File);
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Load (File, Buf, Ptr, ')', Paren);
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if not Paren then
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raise Data_Error;
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end if;
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end if;
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end if;
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end Get;
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----------
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-- Gets --
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----------
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procedure Gets
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(From : String;
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ItemR : out Long_Long_Float;
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ItemI : out Long_Long_Float;
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Last : out Positive)
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is
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Paren : Boolean;
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Pos : Integer;
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begin
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String_Skip (From, Pos);
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if From (Pos) = '(' then
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Pos := Pos + 1;
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Paren := True;
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else
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Paren := False;
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end if;
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Aux.Gets (From (Pos .. From'Last), ItemR, Pos);
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String_Skip (From (Pos + 1 .. From'Last), Pos);
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if From (Pos) = ',' then
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Pos := Pos + 1;
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end if;
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Aux.Gets (From (Pos .. From'Last), ItemI, Pos);
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if Paren then
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String_Skip (From (Pos + 1 .. From'Last), Pos);
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if From (Pos) /= ')' then
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raise Data_Error;
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end if;
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end if;
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Last := Pos;
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end Gets;
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---------
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-- Put --
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---------
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procedure Put
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(File : File_Type;
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ItemR : Long_Long_Float;
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ItemI : Long_Long_Float;
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Fore : Field;
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Aft : Field;
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Exp : Field)
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is
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begin
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Put (File, '(');
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Aux.Put (File, ItemR, Fore, Aft, Exp);
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Put (File, ',');
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Aux.Put (File, ItemI, Fore, Aft, Exp);
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Put (File, ')');
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end Put;
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----------
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-- Puts --
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----------
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procedure Puts
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(To : out String;
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ItemR : Long_Long_Float;
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ItemI : Long_Long_Float;
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Aft : Field;
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Exp : Field)
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is
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I_String : String (1 .. 3 * Field'Last);
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R_String : String (1 .. 3 * Field'Last);
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Iptr : Natural;
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Rptr : Natural;
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begin
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-- Both parts are initially converted with a Fore of 0
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Rptr := 0;
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Set_Image_Real (ItemR, R_String, Rptr, 0, Aft, Exp);
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Iptr := 0;
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Set_Image_Real (ItemI, I_String, Iptr, 0, Aft, Exp);
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-- Check room for both parts plus parens plus comma (RM G.1.3(34))
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if Rptr + Iptr + 3 > To'Length then
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raise Layout_Error;
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end if;
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-- If there is room, layout result according to (RM G.1.3(31-33))
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To (To'First) := '(';
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To (To'First + 1 .. To'First + Rptr) := R_String (1 .. Rptr);
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To (To'First + Rptr + 1) := ',';
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To (To'Last) := ')';
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To (To'Last - Iptr .. To'Last - 1) := I_String (1 .. Iptr);
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for J in To'First + Rptr + 2 .. To'Last - Iptr - 1 loop
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To (J) := ' ';
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end loop;
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end Puts;
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end Ada.Text_IO.Complex_Aux;
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