converting lower case to upper case

converting lower case to upper case

[Greg Schmitt]

Hi all.  I am doing an ada project and I need to convert lower
case character to a upper case character. Is there a simple way 
to do this such as:
   .
   .
   .   
   inch : character;
begin
   if inch>='a' and inch<='z' then
       inch:=toupper(inch);
   end if;
end proc;

I am using a compiler on a VAX4000 I believe that it follows the 83 standards.

Thank you.

Greg Schmitt
gschmitt@cs.mtech.edu

Re: converting lower case to upper case

[Chris O'Regan]

In article <3llhpu$18v@nyx10.cs.du.edu>

GS := Greg Schmitt <gschmitt@nyx10.cs.du.edu>

GS>Hi all.  I am doing an ada project and I need to convert lower
GS>case character to a upper case character. Is there a simple way 
GS>to do this such as:

   You can easily create your own To_Upper function like this:

	function To_Upper (Cin : Character) return Character is
	   I : Integer;
	   Cout : Character;
	begin
	   I := Character'Pos ('a') - Character'Pos ('Z');
	   if Cin in 'a'..'z' then
	      Cout := Character'Val (Character'Pos (Cin) - I);
	   else
	      Cout := Cin;
	   end if;
	   return Cout;
	end;

   I believe that the character set is standard, so you could redeclare "I"
as:

	I : constant Integer := 32;

Chris O'Regan

-- 
  ______________________________________________________________________

  Chris O'Regan                                     Computer Engineering
  ct_orega@ECE.Concordia.CA                         Concordia University

Re: converting lower case to upper case

[tmoran]

Ada 95 has a T_Upper function, but Ada 83 doesn't (though your
compiler vendor may provide one).  If you need to roll your own:
function To_Upper(Item : in Character) return Character is
  Raise_It:constant array('a' .. 'z') of Character
    :="ABCDEFGHIJKLMNOPQRSTUVWXYZ";
begin
  if Item in Raise_It'range then return Raise_It(Item);
  else return Item;
  end if;
end To_Upper;

Re: converting lower case to upper case

[Robert Dewar]

tmoran says:

"function To_Upper(Item : in Character) return Character is
  Raise_It:constant array('a' .. 'z') of Character
    :="ABCDEFGHIJKLMNOPQRSTUVWXYZ";
begin
  if Item in Raise_It'range then return Raise_It(Item);
  else return Item;
  end if;
end To_Upper;"

this is wrong, it handles only the lower part of the Ada character set,
and not Latin-1 extended characters. It is really quite important in
Ada 95 to abandon this familiar do-it-yourself-its-so-easy idiom for
case convesion, and use the routines in Ada.Characters.Handling. This
little bit of effort will be well paid off in future reuse of your code
in internatational contexts.