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108 | -- Abstract :
--
-- See spec
--
-- Copyright (C) 2001, 2002, 2003, 2004, 2009 Stephen Leake. All Rights Reserved.
--
-- This library is free software; you can redistribute it and/or
-- modify it under terms of the GNU General Public License as
-- published by the Free Software Foundation; either version 3, 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 distributed with this program; see file COPYING. If not,
-- write to the Free Software Foundation, 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.Exceptions;
with Ada.Strings.Fixed;
package body SAL.Text_IO_Utils is
use Ada.Text_IO;
procedure Skip_Whitespace
is begin
Skip_Whitespace (Current_Input);
end Skip_Whitespace;
procedure Skip_Whitespace (File : in File_Type)
is
Item : Character;
End_Of_Line : Boolean;
begin
loop
Look_Ahead (File, Item, End_Of_Line);
if End_Of_Line then
if End_Of_File (File) then
return;
else
Skip_Line (File);
end if;
elsif Item = ' ' or Item = ASCII.HT then
Get (File, Item);
else
return;
end if;
end loop;
end Skip_Whitespace;
procedure Skip_Past (Delimiter : in Character)
is begin
Skip_Past (Current_Input, Delimiter);
end Skip_Past;
procedure Skip_Past (File : in Ada.Text_IO.File_Type; Delimiter : in Character)
is
Item : Character;
begin
loop
Get (File, Item);
if Item = Delimiter then
return;
end if;
end loop;
end Skip_Past;
procedure Check (Item : in String)
is begin
Check (Current_Input, Item);
end Check;
procedure Check (File : in File_Type; Item : in String)
is
Trimmed_Item : constant String := Ada.Strings.Fixed.Trim (Item, Ada.Strings.Both);
Temp : String (Trimmed_Item'Range);
begin
Skip_Whitespace (File);
Get (File, Temp);
if Temp /= Trimmed_Item then
Ada.Exceptions.Raise_Exception
(Syntax_Error'Identity,
Name (File) & ":" &
Ada.Strings.Fixed.Trim (Count'Image (Line (File)), Ada.Strings.Both) & ":" &
Ada.Strings.Fixed.Trim (Count'Image (Col (File)), Ada.Strings.Both) &
": Expecting """ & Item & """, found """ & Temp & """.");
end if;
Skip_Whitespace (File);
end Check;
function Peek (File : in Ada.Text_IO.File_Type) return Character
is
Item : Character;
End_Of_Line : Boolean;
begin
Skip_Whitespace (File);
Look_Ahead (File, Item, End_Of_Line);
-- Skip_Whitespace guarrantees End_Of_Line won't be True here.
return Item;
end Peek;
end SAL.Text_IO_Utils;
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