1 ------------------------------------------------------------------------------
3 -- GNAT RUN-TIME 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) 1992-2012, 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_Text_IO.Generic_Aux; use Ada.Wide_Text_IO.Generic_Aux;
33 with Ada.Characters.Handling; use Ada.Characters.Handling;
34 with Interfaces.C_Streams; use Interfaces.C_Streams;
35 with System.WCh_Con; use System.WCh_Con;
37 package body Ada.Wide_Text_IO.Enumeration_Aux is
39 subtype TFT is Ada.Wide_Text_IO.File_Type;
40 -- File type required for calls to routines in Aux
42 -----------------------
43 -- Local Subprograms --
44 -----------------------
48 Buf : out Wide_String;
49 Ptr : in out Integer);
50 -- Store a single character in buffer, checking for overflow
52 -- These definitions replace the ones in Ada.Characters.Handling, which
53 -- do not seem to work for some strange not understood reason ??? at
54 -- least in the OS/2 version.
56 function To_Lower (C : Character) return Character;
62 procedure Get_Enum_Lit
64 Buf : out Wide_String;
72 Load_Skip (TFT (File));
73 ch := Nextc (TFT (File));
75 -- Character literal case. If the initial character is a quote, then
76 -- we read as far as we can without backup (see ACVC test CE3905L)
78 if ch = Character'Pos (''') then
80 Store_Char (WC, Buf, Buflen);
82 ch := Nextc (TFT (File));
84 if ch = LM or else ch = EOF then
89 Store_Char (WC, Buf, Buflen);
91 ch := Nextc (TFT (File));
93 if ch /= Character'Pos (''') then
98 Store_Char (WC, Buf, Buflen);
100 -- Similarly for identifiers, read as far as we can, in particular,
101 -- do read a trailing underscore (again see ACVC test CE3905L to
102 -- understand why we do this, although it seems somewhat peculiar).
105 -- Identifier must start with a letter. Any wide character value
106 -- outside the normal Latin-1 range counts as a letter for this.
108 if ch < 255 and then not Is_Letter (Character'Val (ch)) then
112 -- If we do have a letter, loop through the characters quitting on
113 -- the first non-identifier character (note that this includes the
114 -- cases of hitting a line mark or page mark).
118 Store_Char (WC, Buf, Buflen);
120 ch := Nextc (TFT (File));
124 if ch = Character'Pos ('_') then
125 exit when Buf (Buflen) = '_';
127 elsif ch = Character'Pos (ASCII.ESC) then
130 elsif File.WC_Method in WC_Upper_Half_Encoding_Method
136 exit when not Is_Letter (Character'Val (ch))
138 not Is_Digit (Character'Val (ch));
154 Actual_Width : constant Integer :=
155 Integer'Max (Integer (Width), Item'Length);
158 Check_On_One_Line (TFT (File), Actual_Width);
160 if Set = Lower_Case and then Item (Item'First) /= ''' then
162 Iteml : Wide_String (Item'First .. Item'Last);
165 for J in Item'Range loop
166 if Is_Character (Item (J)) then
168 To_Wide_Character (To_Lower (To_Character (Item (J))));
170 Iteml (J) := Item (J);
181 for J in 1 .. Actual_Width - Item'Length loop
191 (To : out Wide_String;
198 if Item'Length > To'Length then
203 for J in Item'Range loop
205 and then Item (Item'First) /= '''
206 and then Is_Character (Item (J))
209 To_Wide_Character (To_Lower (To_Character (Item (J))));
211 To (Ptr) := Item (J);
217 while Ptr <= To'Last loop
228 procedure Scan_Enum_Lit
235 -- Processing for Scan_Enum_Lit
241 if Start > From'Last then
244 elsif Is_Character (From (Start))
245 and then not Is_Blank (To_Character (From (Start)))
254 -- Character literal case. If the initial character is a quote, then
255 -- we read as far as we can without backup (see ACVC test CE3905L
256 -- which is for the analogous case for reading from a file).
258 if From (Start) = ''' then
261 if Stop = From'Last then
267 if From (Stop) in ' ' .. '~'
268 or else From (Stop) >= Wide_Character'Val (16#80#)
270 if Stop = From'Last then
275 if From (Stop) = ''' then
283 -- Similarly for identifiers, read as far as we can, in particular,
284 -- do read a trailing underscore (again see ACVC test CE3905L to
285 -- understand why we do this, although it seems somewhat peculiar).
288 -- Identifier must start with a letter, any wide character outside
289 -- the normal Latin-1 range is considered a letter for this test.
291 if Is_Character (From (Start))
292 and then not Is_Letter (To_Character (From (Start)))
297 -- If we do have a letter, loop through the characters quitting on
298 -- the first non-identifier character (note that this includes the
299 -- cases of hitting a line mark or page mark).
302 while Stop < From'Last loop
303 WC := From (Stop + 1);
308 not Is_Letter (To_Character (WC))
310 not Is_Letter (To_Character (WC))
312 (WC /= '_' or else From (Stop - 1) = '_');
325 (WC : Wide_Character;
326 Buf : out Wide_String;
327 Ptr : in out Integer)
330 if Ptr = Buf'Last then
342 function To_Lower (C : Character) return Character is
344 if C in 'A' .. 'Z' then
345 return Character'Val (Character'Pos (C) + 32);
351 end Ada.Wide_Text_IO.Enumeration_Aux;