1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
|
------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- C A S I N G --
-- --
-- B o d y --
-- --
-- Copyright (C) 1992-2005 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, 51 Franklin Street, Fifth Floor, --
-- Boston, MA 02110-1301, 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 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
-- 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;
|
