summaryrefslogtreecommitdiff
path: root/gcc/ada/a-ztenau.adb
blob: c5776366bf2323c09734e43f63c49cda39c0b036 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
------------------------------------------------------------------------------
--                                                                          --
--                         GNAT RUN-TIME COMPONENTS                         --
--                                                                          --
--                  ADA.WIDE_WIDE_TEXT_IO.ENUMERATION_AUX                   --
--                                                                          --
--                                 B o d y                                  --
--                                                                          --
--          Copyright (C) 1992-2009, Free Software Foundation, Inc.         --
--                                                                          --
-- GNAT is free software;  you can  redistribute it  and/or modify it under --
-- terms of the  GNU General Public License as published  by the Free Soft- --
-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
--                                                                          --
-- As a special exception under Section 7 of GPL version 3, you are granted --
-- additional permissions described in the GCC Runtime Library Exception,   --
-- version 3.1, as published by the Free Software Foundation.               --
--                                                                          --
-- You should have received a copy of the GNU General Public License and    --
-- a copy of the GCC Runtime Library Exception along with this program;     --
-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
-- <http://www.gnu.org/licenses/>.                                          --
--                                                                          --
-- GNAT was originally developed  by the GNAT team at  New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc.      --
--                                                                          --
------------------------------------------------------------------------------

with Ada.Wide_Wide_Text_IO.Generic_Aux; use Ada.Wide_Wide_Text_IO.Generic_Aux;
with Ada.Characters.Conversions;        use Ada.Characters.Conversions;
with Ada.Characters.Handling;           use Ada.Characters.Handling;
with Interfaces.C_Streams;              use Interfaces.C_Streams;
with System.WCh_Con;                    use System.WCh_Con;

package body Ada.Wide_Wide_Text_IO.Enumeration_Aux is

   subtype TFT is Ada.Wide_Wide_Text_IO.File_Type;
   --  File type required for calls to routines in Aux

   -----------------------
   -- Local Subprograms --
   -----------------------

   procedure Store_Char
     (WC  : Wide_Wide_Character;
      Buf : out Wide_Wide_String;
      Ptr : in out Integer);
   --  Store a single character in buffer, checking for overflow

   --  These definitions replace the ones in Ada.Characters.Handling, which
   --  do not seem to work for some strange not understood reason ??? at
   --  least in the OS/2 version.

   function To_Lower (C : Character) return Character;

   ------------------
   -- Get_Enum_Lit --
   ------------------

   procedure Get_Enum_Lit
     (File   : File_Type;
      Buf    : out Wide_Wide_String;
      Buflen : out Natural)
   is
      ch  : int;
      WC  : Wide_Wide_Character;

   begin
      Buflen := 0;
      Load_Skip (TFT (File));
      ch := Nextc (TFT (File));

      --  Character literal case. If the initial character is a quote, then
      --  we read as far as we can without backup (see ACVC test CE3905L)

      if ch = Character'Pos (''') then
         Get (File, WC);
         Store_Char (WC, Buf, Buflen);

         ch := Nextc (TFT (File));

         if ch = LM or else ch = EOF then
            return;
         end if;

         Get (File, WC);
         Store_Char (WC, Buf, Buflen);

         ch := Nextc (TFT (File));

         if ch /= Character'Pos (''') then
            return;
         end if;

         Get (File, WC);
         Store_Char (WC, Buf, Buflen);

      --  Similarly for identifiers, read as far as we can, in particular,
      --  do read a trailing underscore (again see ACVC test CE3905L to
      --  understand why we do this, although it seems somewhat peculiar).

      else
         --  Identifier must start with a letter. Any wide character value
         --  outside the normal Latin-1 range counts as a letter for this.

         if ch < 255 and then not Is_Letter (Character'Val (ch)) then
            return;
         end if;

         --  If we do have a letter, loop through the characters quitting on
         --  the first non-identifier character (note that this includes the
         --  cases of hitting a line mark or page mark).

         loop
            Get (File, WC);
            Store_Char (WC, Buf, Buflen);

            ch := Nextc (TFT (File));

            exit when ch = EOF;

            if ch = Character'Pos ('_') then
               exit when Buf (Buflen) = '_';

            elsif ch = Character'Pos (ASCII.ESC) then
               null;

            elsif File.WC_Method in WC_Upper_Half_Encoding_Method
              and then ch > 127
            then
               null;

            else
               exit when not Is_Letter (Character'Val (ch))
                           and then
                         not Is_Digit (Character'Val (ch));
            end if;
         end loop;
      end if;
   end Get_Enum_Lit;

   ---------
   -- Put --
   ---------

   procedure Put
     (File  : File_Type;
      Item  : Wide_Wide_String;
      Width : Field;
      Set   : Type_Set)
   is
      Actual_Width : constant Integer :=
                       Integer'Max (Integer (Width), Item'Length);

   begin
      Check_On_One_Line (TFT (File), Actual_Width);

      if Set = Lower_Case and then Item (Item'First) /= ''' then
         declare
            Iteml : Wide_Wide_String (Item'First .. Item'Last);

         begin
            for J in Item'Range loop
               if Is_Character (Item (J)) then
                  Iteml (J) :=
                    To_Wide_Wide_Character
                      (To_Lower (To_Character (Item (J))));
               else
                  Iteml (J) := Item (J);
               end if;
            end loop;

            Put (File, Iteml);
         end;

      else
         Put (File, Item);
      end if;

      for J in 1 .. Actual_Width - Item'Length loop
         Put (File, ' ');
      end loop;
   end Put;

   ----------
   -- Puts --
   ----------

   procedure Puts
     (To   : out Wide_Wide_String;
      Item : Wide_Wide_String;
      Set  : Type_Set)
   is
      Ptr : Natural;

   begin
      if Item'Length > To'Length then
         raise Layout_Error;

      else
         Ptr := To'First;
         for J in Item'Range loop
            if Set = Lower_Case
              and then Item (Item'First) /= '''
              and then Is_Character (Item (J))
            then
               To (Ptr) :=
                 To_Wide_Wide_Character (To_Lower (To_Character (Item (J))));
            else
               To (Ptr) := Item (J);
            end if;

            Ptr := Ptr + 1;
         end loop;

         while Ptr <= To'Last loop
            To (Ptr) := ' ';
            Ptr := Ptr + 1;
         end loop;
      end if;
   end Puts;

   -------------------
   -- Scan_Enum_Lit --
   -------------------

   procedure Scan_Enum_Lit
     (From  : Wide_Wide_String;
      Start : out Natural;
      Stop  : out Natural)
   is
      WC  : Wide_Wide_Character;

   --  Processing for Scan_Enum_Lit

   begin
      Start := From'First;

      loop
         if Start > From'Last then
            raise End_Error;

         elsif Is_Character (From (Start))
           and then not Is_Blank (To_Character (From (Start)))
         then
            exit;

         else
            Start := Start + 1;
         end if;
      end loop;

      --  Character literal case. If the initial character is a quote, then
      --  we read as far as we can without backup (see ACVC test CE3905L
      --  which is for the analogous case for reading from a file).

      if From (Start) = ''' then
         Stop := Start;

         if Stop = From'Last then
            raise Data_Error;
         else
            Stop := Stop + 1;
         end if;

         if From (Stop) in ' ' .. '~'
           or else From (Stop) >= Wide_Wide_Character'Val (16#80#)
         then
            if Stop = From'Last then
               raise Data_Error;
            else
               Stop := Stop + 1;

               if From (Stop) = ''' then
                  return;
               end if;
            end if;
         end if;

         raise Data_Error;

      --  Similarly for identifiers, read as far as we can, in particular,
      --  do read a trailing underscore (again see ACVC test CE3905L to
      --  understand why we do this, although it seems somewhat peculiar).

      else
         --  Identifier must start with a letter, any wide character outside
         --  the normal Latin-1 range is considered a letter for this test.

         if Is_Character (From (Start))
           and then not Is_Letter (To_Character (From (Start)))
         then
            raise Data_Error;
         end if;

         --  If we do have a letter, loop through the characters quitting on
         --  the first non-identifier character (note that this includes the
         --  cases of hitting a line mark or page mark).

         Stop := Start + 1;
         while Stop < From'Last loop
            WC := From (Stop + 1);

            exit when
              Is_Character (WC)
                and then
                  not Is_Letter (To_Character (WC))
                and then
                  not Is_Letter (To_Character (WC))
                and then
                  (WC /= '_' or else From (Stop - 1) = '_');

            Stop := Stop + 1;
         end loop;
      end if;

   end Scan_Enum_Lit;

   ----------------
   -- Store_Char --
   ----------------

   procedure Store_Char
     (WC  : Wide_Wide_Character;
      Buf : out Wide_Wide_String;
      Ptr : in out Integer)
   is
   begin
      if Ptr = Buf'Last then
         raise Data_Error;
      else
         Ptr := Ptr + 1;
         Buf (Ptr) := WC;
      end if;
   end Store_Char;

   --------------
   -- To_Lower --
   --------------

   function To_Lower (C : Character) return Character is
   begin
      if C in 'A' .. 'Z' then
         return Character'Val (Character'Pos (C) + 32);
      else
         return C;
      end if;
   end To_Lower;

end Ada.Wide_Wide_Text_IO.Enumeration_Aux;