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223 | -- --
-- package Copyright (c) Dmitry A. Kazakov --
-- Strings_Edit.Roman_Edit Luebeck --
-- Implementation Spring, 2002 --
-- --
-- Last revision : 21:03 21 Apr 2009 --
-- --
-- This library is free software; you can redistribute it and/or --
-- modify it under the terms of the GNU General Public License as --
-- published by the Free Software Foundation; either version 2 of --
-- the License, or (at your option) any later version. This library --
-- is distributed in the hope that it will be useful, but WITHOUT --
-- ANY WARRANTY; without even the implied warranty of --
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU --
-- General Public License for more details. You should have --
-- received a copy of the GNU General Public License along with --
-- this library; if not, write to the Free Software Foundation, --
-- Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. --
-- --
-- As a special exception, if other files instantiate generics from --
-- this unit, or you link this unit with other files to produce an --
-- executable, this unit does not by itself cause the resulting --
-- executable to be covered by the GNU General Public License. This --
-- exception does not however invalidate any other reasons why the --
-- executable file might be covered by the GNU Public License. --
--____________________________________________________________________--
with Ada.Characters.Handling; use Ada.Characters.Handling;
with Ada.IO_Exceptions; use Ada.IO_Exceptions;
package body Strings_Edit.Roman_Edit is
procedure Get
( Source : in String;
Pointer : in out Integer;
Value : out Roman;
First : in Roman := Roman'First;
Last : in Roman := Roman'Last;
ToFirst : in Boolean := False;
ToLast : in Boolean := False
) is
Result : Integer := 0;
Index : Integer := Pointer;
function Get (Letter : Character) return Boolean;
pragma Inline (Get);
function Get (Letter : Character) return Boolean is
begin
if ( Letter /= '.'
and then
Index <= Source'Last
and then
To_Lower (Source (Index)) = Letter
)
then
Index := Index + 1;
return True;
else
return False;
end if;
end Get;
function Get (I, V, X : Character) return Integer is
begin
if Get (I) then
if Get (I) then
if Get (I) then
return 3;
else
return 2;
end if;
elsif Get (V) then
return 4;
elsif Get (X) then
return 9;
else
return 1;
end if;
elsif Get (V) then
if Get (I) then
if Get (I) then
if Get (I) then
return 8;
else
return 7;
end if;
else
return 6;
end if;
else
return 5;
end if;
else
return 0;
end if;
end Get;
begin
if Index < Source'First then
raise Layout_Error;
end if;
if Index > Source'Last then
if Index - 1 > Source'Last then
raise Layout_Error;
else
raise End_Error;
end if;
end if;
Result := Get ('m', '.', '.');
Result := Result * 10 + Get ('c', 'd', 'm');
Result := Result * 10 + Get ('x', 'l', 'c');
Result := Result * 10 + Get ('i', 'v', 'x');
if Index = Pointer then
raise End_Error;
end if;
if Result < Integer (First) then
if ToFirst then
Value := First;
else
raise Constraint_Error;
end if;
elsif Result > Integer (Last) then
if ToLast then
Value := Last;
else
raise Constraint_Error;
end if;
else
Pointer := Index;
Value := Roman (Result);
end if;
end Get;
function Value
( Source : in String;
First : in Roman := Roman'First;
Last : in Roman := Roman'Last;
ToFirst : in Boolean := False;
ToLast : in Boolean := False
) return Roman is
Result : Roman;
Pointer : Integer := Source'First;
begin
Get (Source, Pointer, SpaceAndTab);
Get (Source, Pointer, Result, First, Last, ToFirst, ToLast);
Get (Source, Pointer, SpaceAndTab);
if Pointer /= Source'Last + 1 then
raise Data_Error;
end if;
return Result;
end Value;
procedure Put
( Destination : in out String;
Pointer : in out Integer;
Value : in Roman;
LowerCase : in Boolean := False;
Field : in Natural := 0;
Justify : in Alignment := Left;
Fill : in Character := ' '
) is
subtype Digit is Integer range 0..9;
type Decimal is array (Integer range 1..4) of Digit;
Encoded : Decimal;
Result : String (1..16);
Index : Integer := Result'First;
Number : Integer := Integer (Value);
procedure Put (Letter : Character);
pragma Inline (Put);
procedure Put (Letter : Character) is
begin
Result (Index) := Letter;
Index := Index + 1;
end Put;
procedure Put (Figure : Digit; I, V, X : Character) is
begin
case Figure is
when 0 => null;
when 1 => Put (I);
when 2 => Put (I); Put (I);
when 3 => Put (I); Put (I); Put (I);
when 4 => Put (I); Put (V);
when 5 => Put (V);
when 6 => Put (V); Put (I);
when 7 => Put (V); Put (I); Put (I);
when 8 => Put (V); Put (I); Put (I); Put (I);
when 9 => Put (I); Put (X);
end case;
end Put;
begin
for Position in reverse Decimal'Range loop
Encoded (Position) := Number mod 10;
Number := Number / 10;
end loop;
if LowerCase then
Put (Encoded (1), 'm', 'm', 'm');
Put (Encoded (2), 'c', 'd', 'm');
Put (Encoded (3), 'x', 'l', 'c');
Put (Encoded (4), 'i', 'v', 'x');
else
Put (Encoded (1), 'M', 'M', 'M');
Put (Encoded (2), 'C', 'D', 'M');
Put (Encoded (3), 'X', 'L', 'C');
Put (Encoded (4), 'I', 'V', 'X');
end if;
Put
( Destination,
Pointer,
Result (Result'First..Index - 1),
Field,
Justify,
Fill
);
end Put;
function Image
( Value : in Roman;
LowerCase : in Boolean := False
) return String is
Text : String (1..16);
Pointer : Integer := Text'First;
begin
Put (Text, Pointer, Value, LowerCase);
return Text (Text'First..Pointer - 1);
end Image;
end Strings_Edit.Roman_Edit;
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