1 ------------------------------------------------------------------------------
3 -- GNAT RUN-TIME COMPONENTS --
5 -- ADA.WIDE_WIDE_TEXT_IO.ENUMERATION_AUX --
9 -- Copyright (C) 1992-2009, 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 3, 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. --
18 -- As a special exception under Section 7 of GPL version 3, you are granted --
19 -- additional permissions described in the GCC Runtime Library Exception, --
20 -- version 3.1, as published by the Free Software Foundation. --
22 -- You should have received a copy of the GNU General Public License and --
23 -- a copy of the GCC Runtime Library Exception along with this program; --
24 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
25 -- <http://www.gnu.org/licenses/>. --
27 -- GNAT was originally developed by the GNAT team at New York University. --
28 -- Extensive contributions were provided by Ada Core Technologies Inc. --
30 ------------------------------------------------------------------------------
32 with Ada.Wide_Wide_Text_IO.Generic_Aux; use Ada.Wide_Wide_Text_IO.Generic_Aux;
33 with Ada.Characters.Conversions; use Ada.Characters.Conversions;
34 with Ada.Characters.Handling; use Ada.Characters.Handling;
35 with Interfaces.C_Streams; use Interfaces.C_Streams;
36 with System.WCh_Con; use System.WCh_Con;
38 package body Ada.Wide_Wide_Text_IO.Enumeration_Aux is
40 subtype TFT is Ada.Wide_Wide_Text_IO.File_Type;
41 -- File type required for calls to routines in Aux
43 -----------------------
44 -- Local Subprograms --
45 -----------------------
48 (WC : Wide_Wide_Character;
49 Buf : out Wide_Wide_String;
50 Ptr : in out Integer);
51 -- Store a single character in buffer, checking for overflow
53 -- These definitions replace the ones in Ada.Characters.Handling, which
54 -- do not seem to work for some strange not understood reason ??? at
55 -- least in the OS/2 version.
57 function To_Lower (C : Character) return Character;
63 procedure Get_Enum_Lit
65 Buf : out Wide_Wide_String;
69 WC : Wide_Wide_Character;
73 Load_Skip (TFT (File));
74 ch := Nextc (TFT (File));
76 -- Character literal case. If the initial character is a quote, then
77 -- we read as far as we can without backup (see ACVC test CE3905L)
79 if ch = Character'Pos (''') then
81 Store_Char (WC, Buf, Buflen);
83 ch := Nextc (TFT (File));
85 if ch = LM or else ch = EOF then
90 Store_Char (WC, Buf, Buflen);
92 ch := Nextc (TFT (File));
94 if ch /= Character'Pos (''') then
99 Store_Char (WC, Buf, Buflen);
101 -- Similarly for identifiers, read as far as we can, in particular,
102 -- do read a trailing underscore (again see ACVC test CE3905L to
103 -- understand why we do this, although it seems somewhat peculiar).
106 -- Identifier must start with a letter. Any wide character value
107 -- outside the normal Latin-1 range counts as a letter for this.
109 if ch < 255 and then not Is_Letter (Character'Val (ch)) then
113 -- If we do have a letter, loop through the characters quitting on
114 -- the first non-identifier character (note that this includes the
115 -- cases of hitting a line mark or page mark).
119 Store_Char (WC, Buf, Buflen);
121 ch := Nextc (TFT (File));
125 if ch = Character'Pos ('_') then
126 exit when Buf (Buflen) = '_';
128 elsif ch = Character'Pos (ASCII.ESC) then
131 elsif File.WC_Method in WC_Upper_Half_Encoding_Method
137 exit when not Is_Letter (Character'Val (ch))
139 not Is_Digit (Character'Val (ch));
151 Item : Wide_Wide_String;
155 Actual_Width : constant Integer :=
156 Integer'Max (Integer (Width), Item'Length);
159 Check_On_One_Line (TFT (File), Actual_Width);
161 if Set = Lower_Case and then Item (Item'First) /= ''' then
163 Iteml : Wide_Wide_String (Item'First .. Item'Last);
166 for J in Item'Range loop
167 if Is_Character (Item (J)) then
169 To_Wide_Wide_Character
170 (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_Wide_String;
194 Item : Wide_Wide_String;
200 if Item'Length > To'Length then
205 for J in Item'Range loop
207 and then Item (Item'First) /= '''
208 and then Is_Character (Item (J))
211 To_Wide_Wide_Character (To_Lower (To_Character (Item (J))));
213 To (Ptr) := Item (J);
219 while Ptr <= To'Last loop
230 procedure Scan_Enum_Lit
231 (From : Wide_Wide_String;
235 WC : Wide_Wide_Character;
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_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_Wide_Character;
328 Buf : out Wide_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_Wide_Text_IO.Enumeration_Aux;