1 ------------------------------------------------------------------------------
3 -- GNAT RUNTIME COMPONENTS --
5 -- A D A . W I D E _ T E X T _ I O . G E N E R I C _ A U X --
11 -- Copyright (C) 1992-2000 Free Software Foundation, Inc. --
13 -- GNAT is free software; you can redistribute it and/or modify it under --
14 -- terms of the GNU General Public License as published by the Free Soft- --
15 -- ware Foundation; either version 2, or (at your option) any later ver- --
16 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
17 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
18 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
19 -- for more details. You should have received a copy of the GNU General --
20 -- Public License distributed with GNAT; see file COPYING. If not, write --
21 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
22 -- MA 02111-1307, USA. --
24 -- As a special exception, if other files instantiate generics from this --
25 -- unit, or you link this unit with other files to produce an executable, --
26 -- this unit does not by itself cause the resulting executable to be --
27 -- covered by the GNU General Public License. This exception does not --
28 -- however invalidate any other reasons why the executable file might be --
29 -- covered by the GNU Public License. --
31 -- GNAT was originally developed by the GNAT team at New York University. --
32 -- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
34 ------------------------------------------------------------------------------
36 with Interfaces.C_Streams; use Interfaces.C_Streams;
38 with System.File_Control_Block;
40 package body Ada.Wide_Text_IO.Generic_Aux is
42 package FIO renames System.File_IO;
43 package FCB renames System.File_Control_Block;
44 subtype AP is FCB.AFCB_Ptr;
46 ------------------------
47 -- Check_End_Of_Field --
48 ------------------------
50 procedure Check_End_Of_Field
65 for J in Ptr .. Stop loop
66 if not Is_Blank (Buf (J)) then
71 end Check_End_Of_Field;
73 -----------------------
74 -- Check_On_One_Line --
75 -----------------------
77 procedure Check_On_One_Line
82 FIO.Check_Write_Status (AP (File));
84 if File.Line_Length /= 0 then
85 if Count (Length) > File.Line_Length then
87 elsif File.Col + Count (Length) > File.Line_Length + 1 then
91 end Check_On_One_Line;
97 function Is_Blank (C : Character) return Boolean is
99 return C = ' ' or else C = ASCII.HT;
109 Ptr : in out Integer;
111 Loaded : out Boolean)
116 if File.Before_Wide_Character then
123 if ch = Character'Pos (Char) then
124 Store_Char (File, ch, Buf, Ptr);
136 Ptr : in out Integer;
142 if File.Before_Wide_Character then
148 if ch = Character'Pos (Char) then
149 Store_Char (File, ch, Buf, Ptr);
159 Ptr : in out Integer;
162 Loaded : out Boolean)
167 if File.Before_Wide_Character then
174 if ch = Character'Pos (Char1)
175 or else ch = Character'Pos (Char2)
177 Store_Char (File, ch, Buf, Ptr);
189 Ptr : in out Integer;
196 if File.Before_Wide_Character then
202 if ch = Character'Pos (Char1)
203 or else ch = Character'Pos (Char2)
205 Store_Char (File, ch, Buf, Ptr);
216 procedure Load_Digits
219 Ptr : in out Integer;
220 Loaded : out Boolean)
223 After_Digit : Boolean;
226 if File.Before_Wide_Character then
233 if ch not in Character'Pos ('0') .. Character'Pos ('9') then
241 Store_Char (File, ch, Buf, Ptr);
244 if ch in Character'Pos ('0') .. Character'Pos ('9') then
247 elsif ch = Character'Pos ('_') and then After_Digit then
248 After_Digit := False;
260 procedure Load_Digits
263 Ptr : in out Integer)
266 After_Digit : Boolean;
269 if File.Before_Wide_Character then
275 if ch in Character'Pos ('0') .. Character'Pos ('9') then
279 Store_Char (File, ch, Buf, Ptr);
282 if ch in Character'Pos ('0') .. Character'Pos ('9') then
285 elsif ch = Character'Pos ('_') and then After_Digit then
286 After_Digit := False;
298 --------------------------
299 -- Load_Extended_Digits --
300 --------------------------
302 procedure Load_Extended_Digits
305 Ptr : in out Integer;
306 Loaded : out Boolean)
309 After_Digit : Boolean := False;
312 if File.Before_Wide_Character then
322 if ch in Character'Pos ('0') .. Character'Pos ('9')
324 ch in Character'Pos ('a') .. Character'Pos ('f')
326 ch in Character'Pos ('A') .. Character'Pos ('F')
330 elsif ch = Character'Pos ('_') and then After_Digit then
331 After_Digit := False;
337 Store_Char (File, ch, Buf, Ptr);
343 end Load_Extended_Digits;
345 procedure Load_Extended_Digits
348 Ptr : in out Integer)
353 Load_Extended_Digits (File, Buf, Ptr, Junk);
354 end Load_Extended_Digits;
360 procedure Load_Skip (File : File_Type) is
364 FIO.Check_Read_Status (AP (File));
366 -- We need to explicitly test for the case of being before a wide
367 -- character (greater than 16#7F#). Since no such character can
368 -- ever legitimately be a valid numeric character, we can
369 -- immediately signal Data_Error.
371 if File.Before_Wide_Character then
375 -- Otherwise loop till we find a non-blank character (note that as
376 -- usual in Wide_Text_IO, blank includes horizontal tab). Note that
377 -- Get_Character deals with Before_LM/Before_LM_PM flags appropriately.
380 Get_Character (File, C);
381 exit when not Is_Blank (C);
384 Ungetc (Character'Pos (C), File);
385 File.Col := File.Col - 1;
396 Ptr : in out Integer)
401 Bad_Wide_C : Boolean := False;
402 -- Set True if one of the characters read is not in range of type
403 -- Character. This is always a Data_Error, but we do not signal it
404 -- right away, since we have to read the full number of characters.
407 FIO.Check_Read_Status (AP (File));
409 -- If we are immediately before a line mark, then we have no characters.
410 -- This is always a data error, so we may as well raise it right away.
412 if File.Before_LM then
416 for J in 1 .. Width loop
417 if File.Before_Wide_Character then
419 Store_Char (File, 0, Buf, Ptr);
420 File.Before_Wide_Character := False;
433 WC := Get_Wide_Char (Character'Val (ch), File);
434 ch := Wide_Character'Pos (WC);
441 Store_Char (File, ch, Buf, Ptr);
456 procedure Put_Item (File : File_Type; Str : String) is
458 Check_On_One_Line (File, Str'Length);
460 for J in Str'Range loop
461 Put (File, Wide_Character'Val (Character'Pos (Str (J))));
473 Ptr : in out Integer)
476 File.Col := File.Col + 1;
478 if Ptr = Buf'Last then
482 Buf (Ptr) := Character'Val (ch);
490 procedure String_Skip (Str : String; Ptr : out Integer) is
495 if Ptr > Str'Last then
498 elsif not Is_Blank (Str (Ptr)) then
511 procedure Ungetc (ch : int; File : File_Type) is
514 if ungetc (ch, File.Stream) = EOF then
520 end Ada.Wide_Text_IO.Generic_Aux;