1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2005 Free Software Foundation, Inc. --
11 -- GNAT is free software; you can redistribute it and/or modify it under --
12 -- terms of the GNU General Public License as published by the Free Soft- --
13 -- ware Foundation; either version 2, or (at your option) any later ver- --
14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNAT; see file COPYING. If not, write --
19 -- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
20 -- Boston, MA 02110-1301, USA. --
22 -- As a special exception, if other files instantiate generics from this --
23 -- unit, or you link this unit with other files to produce an executable, --
24 -- this unit does not by itself cause the resulting executable to be --
25 -- covered by the GNU General Public License. This exception does not --
26 -- however invalidate any other reasons why the executable file might be --
27 -- covered by the GNU Public License. --
29 -- GNAT was originally developed by the GNAT team at New York University. --
30 -- Extensive contributions were provided by Ada Core Technologies Inc. --
32 ------------------------------------------------------------------------------
34 with Csets; use Csets;
35 with Namet; use Namet;
37 with Types; use Types;
38 with Widechar; use Widechar;
40 package body Casing is
42 ----------------------
43 -- Determine_Casing --
44 ----------------------
46 function Determine_Casing (Ident : Text_Buffer) return Casing_Type is
48 All_Lower : Boolean := True;
49 -- Set False if upper case letter found
51 All_Upper : Boolean := True;
52 -- Set False if lower case letter found
54 Mixed : Boolean := True;
55 -- Set False if exception to mixed case rule found (lower case letter
56 -- at start or after underline, or upper case letter elsewhere).
58 Decisive : Boolean := False;
59 -- Set True if at least one instance of letter not after underline
61 After_Und : Boolean := True;
62 -- True at start of string, and after an underline character
65 for S in Ident'Range loop
66 if Ident (S) = '_' or else Ident (S) = '.' then
69 elsif Is_Lower_Case_Letter (Ident (S)) then
79 elsif Is_Upper_Case_Letter (Ident (S)) then
91 -- Now we can figure out the result from the flags we set in that loop
94 return All_Lower_Case;
96 elsif not Decisive then
100 return All_Upper_Case;
108 end Determine_Casing;
110 ------------------------
111 -- Set_All_Upper_Case --
112 ------------------------
114 procedure Set_All_Upper_Case is
116 Set_Casing (All_Upper_Case);
117 end Set_All_Upper_Case;
123 procedure Set_Casing (C : Casing_Type; D : Casing_Type := Mixed_Case) is
126 Actual_Casing : Casing_Type;
127 -- Set from C or D as appropriate
129 After_Und : Boolean := True;
130 -- True at start of string, and after an underline character or after
131 -- any other special character that is not a normal identifier char).
142 while Ptr <= Name_Len loop
144 -- Wide character. Note that we do nothing with casing in this case.
145 -- In Ada 2005 mode, required folding of lower case letters happened
146 -- as the identifier was scanned, and we do not attempt any further
147 -- messing with case (note that in any case we do not know how to
148 -- fold upper case to lower case in wide character mode). We also
149 -- do not bother with recognizing punctuation as equivalent to an
150 -- underscore. There is nothing functional at this stage in doing
151 -- the requested casing operation, beyond folding to upper case
152 -- when it is mandatory, which does not involve underscores.
154 if Name_Buffer (Ptr) = ASCII.ESC
155 or else Name_Buffer (Ptr) = '['
156 or else (Upper_Half_Encoding
157 and then Name_Buffer (Ptr) in Upper_Half_Character)
159 Skip_Wide (Name_Buffer, Ptr);
162 -- Underscore, or non-identifer character (error case)
164 elsif Name_Buffer (Ptr) = '_'
165 or else not Identifier_Char (Name_Buffer (Ptr))
172 elsif Is_Lower_Case_Letter (Name_Buffer (Ptr)) then
173 if Actual_Casing = All_Upper_Case
174 or else (After_Und and then Actual_Casing = Mixed_Case)
176 Name_Buffer (Ptr) := Fold_Upper (Name_Buffer (Ptr));
184 elsif Is_Upper_Case_Letter (Name_Buffer (Ptr)) then
185 if Actual_Casing = All_Lower_Case
186 or else (not After_Und and then Actual_Casing = Mixed_Case)
188 Name_Buffer (Ptr) := Fold_Lower (Name_Buffer (Ptr));
194 -- Other identifier character (must be digit)