1 ------------------------------------------------------------------------------
3 -- GNAT RUN-TIME COMPONENTS --
5 -- ADA.WIDE_WIDE_TEXT_IO.ENUMERATION_AUX --
9 -- Copyright (C) 1992-2007, 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 Ada.Wide_Wide_Text_IO.Generic_Aux; use Ada.Wide_Wide_Text_IO.Generic_Aux;
35 with Ada.Characters.Conversions; use Ada.Characters.Conversions;
36 with Ada.Characters.Handling; use Ada.Characters.Handling;
37 with Interfaces.C_Streams; use Interfaces.C_Streams;
38 with System.WCh_Con; use System.WCh_Con;
40 package body Ada.Wide_Wide_Text_IO.Enumeration_Aux is
42 subtype TFT is Ada.Wide_Wide_Text_IO.File_Type;
43 -- File type required for calls to routines in Aux
45 -----------------------
46 -- Local Subprograms --
47 -----------------------
50 (WC : Wide_Wide_Character;
51 Buf : out Wide_Wide_String;
52 Ptr : in out Integer);
53 -- Store a single character in buffer, checking for overflow
55 -- These definitions replace the ones in Ada.Characters.Handling, which
56 -- do not seem to work for some strange not understood reason ??? at
57 -- least in the OS/2 version.
59 function To_Lower (C : Character) return Character;
65 procedure Get_Enum_Lit
67 Buf : out Wide_Wide_String;
71 WC : Wide_Wide_Character;
75 Load_Skip (TFT (File));
76 ch := Nextc (TFT (File));
78 -- Character literal case. If the initial character is a quote, then
79 -- we read as far as we can without backup (see ACVC test CE3905L)
81 if ch = Character'Pos (''') then
83 Store_Char (WC, Buf, Buflen);
85 ch := Nextc (TFT (File));
87 if ch = LM or else ch = EOF then
92 Store_Char (WC, Buf, Buflen);
94 ch := Nextc (TFT (File));
96 if ch /= Character'Pos (''') then
101 Store_Char (WC, Buf, Buflen);
103 -- Similarly for identifiers, read as far as we can, in particular,
104 -- do read a trailing underscore (again see ACVC test CE3905L to
105 -- understand why we do this, although it seems somewhat peculiar).
108 -- Identifier must start with a letter. Any wide character value
109 -- outside the normal Latin-1 range counts as a letter for this.
111 if ch < 255 and then not Is_Letter (Character'Val (ch)) then
115 -- If we do have a letter, loop through the characters quitting on
116 -- the first non-identifier character (note that this includes the
117 -- cases of hitting a line mark or page mark).
121 Store_Char (WC, Buf, Buflen);
123 ch := Nextc (TFT (File));
127 if ch = Character'Pos ('_') then
128 exit when Buf (Buflen) = '_';
130 elsif ch = Character'Pos (ASCII.ESC) then
133 elsif File.WC_Method in WC_Upper_Half_Encoding_Method
139 exit when not Is_Letter (Character'Val (ch))
141 not Is_Digit (Character'Val (ch));
153 Item : Wide_Wide_String;
157 Actual_Width : constant Integer :=
158 Integer'Max (Integer (Width), Item'Length);
161 Check_On_One_Line (TFT (File), Actual_Width);
163 if Set = Lower_Case and then Item (Item'First) /= ''' then
165 Iteml : Wide_Wide_String (Item'First .. Item'Last);
168 for J in Item'Range loop
169 if Is_Character (Item (J)) then
171 To_Wide_Wide_Character
172 (To_Lower (To_Character (Item (J))));
174 Iteml (J) := Item (J);
185 for J in 1 .. Actual_Width - Item'Length loop
195 (To : out Wide_Wide_String;
196 Item : Wide_Wide_String;
202 if Item'Length > To'Length then
207 for J in Item'Range loop
209 and then Item (Item'First) /= '''
210 and then Is_Character (Item (J))
213 To_Wide_Wide_Character (To_Lower (To_Character (Item (J))));
215 To (Ptr) := Item (J);
221 while Ptr <= To'Last loop
232 procedure Scan_Enum_Lit
233 (From : Wide_Wide_String;
237 WC : Wide_Wide_Character;
239 -- Processing for Scan_Enum_Lit
245 if Start > From'Last then
248 elsif Is_Character (From (Start))
249 and then not Is_Blank (To_Character (From (Start)))
258 -- Character literal case. If the initial character is a quote, then
259 -- we read as far as we can without backup (see ACVC test CE3905L
260 -- which is for the analogous case for reading from a file).
262 if From (Start) = ''' then
265 if Stop = From'Last then
271 if From (Stop) in ' ' .. '~'
272 or else From (Stop) >= Wide_Wide_Character'Val (16#80#)
274 if Stop = From'Last then
279 if From (Stop) = ''' then
287 -- Similarly for identifiers, read as far as we can, in particular,
288 -- do read a trailing underscore (again see ACVC test CE3905L to
289 -- understand why we do this, although it seems somewhat peculiar).
292 -- Identifier must start with a letter, any wide character outside
293 -- the normal Latin-1 range is considered a letter for this test.
295 if Is_Character (From (Start))
296 and then not Is_Letter (To_Character (From (Start)))
301 -- If we do have a letter, loop through the characters quitting on
302 -- the first non-identifier character (note that this includes the
303 -- cases of hitting a line mark or page mark).
306 while Stop < From'Last loop
307 WC := From (Stop + 1);
312 not Is_Letter (To_Character (WC))
314 not Is_Letter (To_Character (WC))
316 (WC /= '_' or else From (Stop - 1) = '_');
329 (WC : Wide_Wide_Character;
330 Buf : out Wide_Wide_String;
331 Ptr : in out Integer)
334 if Ptr = Buf'Last then
346 function To_Lower (C : Character) return Character is
348 if C in 'A' .. 'Z' then
349 return Character'Val (Character'Pos (C) + 32);
355 end Ada.Wide_Wide_Text_IO.Enumeration_Aux;