1 ------------------------------------------------------------------------------
3 -- GNAT RUNTIME COMPONENTS --
5 -- A D A . W I D E _ T E X T _ I O . E N U M E R A T I O N _ A U X --
9 -- Copyright (C) 1992-2003, 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, 59 Temple Place - Suite 330, Boston, --
20 -- MA 02111-1307, 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_Text_IO.Generic_Aux; use Ada.Wide_Text_IO.Generic_Aux;
35 with Ada.Characters.Handling; use Ada.Characters.Handling;
36 with Interfaces.C_Streams; use Interfaces.C_Streams;
37 with System.WCh_Con; use System.WCh_Con;
39 package body Ada.Wide_Text_IO.Enumeration_Aux is
41 subtype TFT is Ada.Wide_Text_IO.File_Type;
42 -- File type required for calls to routines in Aux
44 -----------------------
45 -- Local Subprograms --
46 -----------------------
50 Buf : out Wide_String;
51 Ptr : in out Integer);
52 -- Store a single character in buffer, checking for overflow.
54 -- These definitions replace the ones in Ada.Characters.Handling, which
55 -- do not seem to work for some strange not understood reason ??? at
56 -- least in the OS/2 version.
58 function To_Lower (C : Character) return Character;
64 procedure Get_Enum_Lit
66 Buf : out Wide_String;
74 Load_Skip (TFT (File));
75 ch := Nextc (TFT (File));
77 -- Character literal case. If the initial character is a quote, then
78 -- we read as far as we can without backup (see ACVC test CE3905L)
80 if ch = Character'Pos (''') then
82 Store_Char (WC, Buf, Buflen);
84 ch := Nextc (TFT (File));
86 if ch = LM or else ch = EOF then
91 Store_Char (WC, Buf, Buflen);
93 ch := Nextc (TFT (File));
95 if ch /= Character'Pos (''') then
100 Store_Char (WC, Buf, Buflen);
102 -- Similarly for identifiers, read as far as we can, in particular,
103 -- do read a trailing underscore (again see ACVC test CE3905L to
104 -- understand why we do this, although it seems somewhat peculiar).
107 -- Identifier must start with a letter. Any wide character value
108 -- outside the normal Latin-1 range counts as a letter for this.
110 if ch < 255 and then not Is_Letter (Character'Val (ch)) then
114 -- If we do have a letter, loop through the characters quitting on
115 -- the first non-identifier character (note that this includes the
116 -- cases of hitting a line mark or page mark).
120 Store_Char (WC, Buf, Buflen);
122 ch := Nextc (TFT (File));
126 if ch = Character'Pos ('_') then
127 exit when Buf (Buflen) = '_';
129 elsif ch = Character'Pos (ASCII.ESC) then
132 elsif File.WC_Method in WC_Upper_Half_Encoding_Method
138 exit when not Is_Letter (Character'Val (ch))
140 not Is_Digit (Character'Val (ch));
156 Actual_Width : constant Integer :=
157 Integer'Max (Integer (Width), Item'Length);
160 Check_On_One_Line (TFT (File), Actual_Width);
162 if Set = Lower_Case and then Item (1) /= ''' then
164 Iteml : Wide_String (Item'First .. Item'Last);
167 for J in Item'Range loop
168 if Is_Character (Item (J)) then
170 To_Wide_Character (To_Lower (To_Character (Item (J))));
172 Iteml (J) := Item (J);
183 for J in 1 .. Actual_Width - Item'Length loop
193 (To : out Wide_String;
194 Item : in Wide_String;
200 if Item'Length > To'Length then
205 for J in Item'Range loop
207 and then Item (1) /= '''
208 and then Is_Character (Item (J))
211 To_Wide_Character (To_Lower (To_Character (Item (J))));
213 To (Ptr) := Item (J);
219 while Ptr <= To'Last loop
230 procedure Scan_Enum_Lit
237 -- Processing for Scan_Enum_Lit
243 if Start > From'Last then
246 elsif Is_Character (From (Start))
247 and then not Is_Blank (To_Character (From (Start)))
256 -- Character literal case. If the initial character is a quote, then
257 -- we read as far as we can without backup (see ACVC test CE3905L
258 -- which is for the analogous case for reading from a file).
260 if From (Start) = ''' then
263 if Stop = From'Last then
269 if From (Stop) in ' ' .. '~'
270 or else From (Stop) >= Wide_Character'Val (16#80#)
272 if Stop = From'Last then
277 if From (Stop) = ''' then
285 -- Similarly for identifiers, read as far as we can, in particular,
286 -- do read a trailing underscore (again see ACVC test CE3905L to
287 -- understand why we do this, although it seems somewhat peculiar).
290 -- Identifier must start with a letter, any wide character outside
291 -- the normal Latin-1 range is considered a letter for this test.
293 if Is_Character (From (Start))
294 and then not Is_Letter (To_Character (From (Start)))
299 -- If we do have a letter, loop through the characters quitting on
300 -- the first non-identifier character (note that this includes the
301 -- cases of hitting a line mark or page mark).
304 while Stop < From'Last loop
305 WC := From (Stop + 1);
310 not Is_Letter (To_Character (WC))
312 not Is_Letter (To_Character (WC))
314 (WC /= '_' or else From (Stop - 1) = '_');
327 (WC : Wide_Character;
328 Buf : out Wide_String;
329 Ptr : in out Integer)
332 if Ptr = Buf'Last then
344 function To_Lower (C : Character) return Character is
346 if C in 'A' .. 'Z' then
347 return Character'Val (Character'Pos (C) + 32);
353 end Ada.Wide_Text_IO.Enumeration_Aux;