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------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- C A S I N G --
-- --
-- B o d y --
-- --
-- Copyright (C) 1992-2001 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 2, 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. See the GNU General Public License --
-- for more details. You should have received a copy of the GNU General --
-- Public License distributed with GNAT; 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. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
with Csets; use Csets;
with Namet; use Namet;
with Opt; use Opt;
with Types; use Types;
with Widechar; use Widechar;
package body Casing is
----------------------
-- Determine_Casing --
----------------------
function Determine_Casing (Ident : Text_Buffer) return Casing_Type is
All_Lower : Boolean := True;
-- Set False if upper case letter found
All_Upper : Boolean := True;
-- Set False if lower case letter found
Mixed : Boolean := True;
-- Set False if exception to mixed case rule found (lower case letter
-- at start or after underline, or upper case letter elsewhere).
Decisive : Boolean := False;
-- Set True if at least one instance of letter not after underline
After_Und : Boolean := True;
-- True at start of string, and after an underline character
begin
for S in Ident'Range loop
if Ident (S) = '_' or else Ident (S) = '.' then
After_Und := True;
elsif Is_Lower_Case_Letter (Ident (S)) then
All_Upper := False;
if not After_Und then
Decisive := True;
else
After_Und := False;
Mixed := False;
end if;
elsif Is_Upper_Case_Letter (Ident (S)) then
All_Lower := False;
if not After_Und then
Decisive := True;
Mixed := False;
else
After_Und := False;
end if;
end if;
end loop;
-- Now we can figure out the result from the flags we set in that loop
if All_Lower then
return All_Lower_Case;
elsif not Decisive then
return Unknown;
elsif All_Upper then
return All_Upper_Case;
elsif Mixed then
return Mixed_Case;
else
return Unknown;
end if;
end Determine_Casing;
------------------------
-- Set_All_Upper_Case --
------------------------
procedure Set_All_Upper_Case is
begin
Set_Casing (All_Upper_Case);
end Set_All_Upper_Case;
----------------
-- Set_Casing --
----------------
procedure Set_Casing (C : Casing_Type; D : Casing_Type := Mixed_Case) is
Ptr : Natural;
Actual_Casing : Casing_Type;
-- Set from C or D as appropriate
After_Und : Boolean := True;
-- True at start of string, and after an underline character or after
-- any other special character that is not a normal identifier char).
begin
if C /= Unknown then
Actual_Casing := C;
else
Actual_Casing := D;
end if;
Ptr := 1;
while Ptr <= Name_Len loop
if Name_Buffer (Ptr) = ASCII.ESC
or else Name_Buffer (Ptr) = '['
or else (Upper_Half_Encoding
and then Name_Buffer (Ptr) in Upper_Half_Character)
then
Skip_Wide (Name_Buffer, Ptr);
After_Und := False;
elsif Name_Buffer (Ptr) = '_'
or else not Identifier_Char (Name_Buffer (Ptr))
then
After_Und := True;
Ptr := Ptr + 1;
elsif Is_Lower_Case_Letter (Name_Buffer (Ptr)) then
if Actual_Casing = All_Upper_Case
or else (After_Und and then Actual_Casing = Mixed_Case)
then
Name_Buffer (Ptr) := Fold_Upper (Name_Buffer (Ptr));
end if;
After_Und := False;
Ptr := Ptr + 1;
elsif Is_Upper_Case_Letter (Name_Buffer (Ptr)) then
if Actual_Casing = All_Lower_Case
or else (not After_Und and then Actual_Casing = Mixed_Case)
then
Name_Buffer (Ptr) := Fold_Lower (Name_Buffer (Ptr));
end if;
After_Und := False;
Ptr := Ptr + 1;
else -- all other characters
After_Und := False;
Ptr := Ptr + 1;
end if;
end loop;
end Set_Casing;
end Casing;
|
