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------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- C A S I N G --
-- --
-- B o d y --
-- --
-- Copyright (C) 1992-2013, 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 Csets; use Csets;
with Namet; use Namet;
with Opt; use Opt;
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
-- A special kludge, consider SPARK_Mode to be mixed case
if Ident = "SPARK_Mode" then
return Mixed_Case;
end if;
-- Proceed with normal determination
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
-- Wide character. Note that we do nothing with casing in this case.
-- In Ada 2005 mode, required folding of lower case letters happened
-- as the identifier was scanned, and we do not attempt any further
-- messing with case (note that in any case we do not know how to
-- fold upper case to lower case in wide character mode). We also
-- do not bother with recognizing punctuation as equivalent to an
-- underscore. There is nothing functional at this stage in doing
-- the requested casing operation, beyond folding to upper case
-- when it is mandatory, which does not involve underscores.
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;
-- Underscore, or non-identifer character (error case)
elsif Name_Buffer (Ptr) = '_'
or else not Identifier_Char (Name_Buffer (Ptr))
then
After_Und := True;
Ptr := Ptr + 1;
-- Lower case letter
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;
-- Upper case letter
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;
-- Other identifier character (must be digit)
else
After_Und := False;
Ptr := Ptr + 1;
end if;
end loop;
end Set_Casing;
end Casing;
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