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