This file is indexed.

/usr/share/ada/adainclude/gnatprj/stylesw.adb is in libgnatprj4.8-dev 4.8.2-8ubuntu3.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  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
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
------------------------------------------------------------------------------
--                                                                          --
--                         GNAT COMPILER COMPONENTS                         --
--                                                                          --
--                              S T Y L E S W                               --
--                                                                          --
--                                 B o d y                                  --
--                                                                          --
--          Copyright (C) 1992-2012, 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.  See the GNU General Public License --
-- for  more details.  You should have  received  a copy of the GNU General --
-- Public License  distributed with GNAT; see file COPYING3.  If not, go to --
-- http://www.gnu.org/licenses for a complete copy of the license.          --
--                                                                          --
-- GNAT was originally developed  by the GNAT team at  New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc.      --
--                                                                          --
------------------------------------------------------------------------------

with Hostparm; use Hostparm;
with Opt;      use Opt;

package body Stylesw is

   --  The following constant defines the default style options for -gnaty

   Default_Style : constant String :=
                     "3" &  -- indentation level is 3
                     "a" &  -- check attribute casing
                     "A" &  -- check array attribute indexes
                     "b" &  -- check no blanks at end of lines
                     "c" &  -- check comment formats
                     "e" &  -- check end/exit labels present
                     "f" &  -- check no form/feeds vertical tabs in source
                     "h" &  -- check no horizontal tabs in source
                     "i" &  -- check if-then layout
                     "k" &  -- check casing rules for keywords
                     "l" &  -- check reference manual layout
                     "m" &  -- check line length <= 79 characters
                     "n" &  -- check casing of package Standard idents
                     "p" &  -- check pragma casing
                     "r" &  -- check casing for identifier references
                     "s" &  -- check separate subprogram specs present
                     "t";   -- check token separation rules

   --  The following constant defines the GNAT style options, showing them
   --  as additions to the standard default style check options.

   GNAT_Style    : constant String := Default_Style &
                     "d" &  -- check no DOS line terminators
                     "I" &  -- check mode IN
                     "S" &  -- check separate lines after THEN or ELSE
                     "u" &  -- check no unnecessary blank lines
                     "x";   -- check extra parentheses around conditionals

   --  Note: we intend GNAT_Style to also include the following, but we do
   --  not yet have the whole tool suite clean with respect to this.

   --                "B" &  -- check boolean operators

   -------------------------------
   -- Reset_Style_Check_Options --
   -------------------------------

   procedure Reset_Style_Check_Options is
   begin
      Style_Check_Indentation           := 0;
      Style_Check_Array_Attribute_Index := False;
      Style_Check_Attribute_Casing      := False;
      Style_Check_Blanks_At_End         := False;
      Style_Check_Blank_Lines           := False;
      Style_Check_Boolean_And_Or        := False;
      Style_Check_Comments              := False;
      Style_Check_DOS_Line_Terminator   := False;
      Style_Check_End_Labels            := False;
      Style_Check_Form_Feeds            := False;
      Style_Check_Horizontal_Tabs       := False;
      Style_Check_If_Then_Layout        := False;
      Style_Check_Keyword_Casing        := False;
      Style_Check_Layout                := False;
      Style_Check_Max_Line_Length       := False;
      Style_Check_Max_Nesting_Level     := False;
      Style_Check_Missing_Overriding    := False;
      Style_Check_Mode_In               := False;
      Style_Check_Order_Subprograms     := False;
      Style_Check_Pragma_Casing         := False;
      Style_Check_References            := False;
      Style_Check_Separate_Stmt_Lines   := False;
      Style_Check_Specs                 := False;
      Style_Check_Standard              := False;
      Style_Check_Tokens                := False;
      Style_Check_Xtra_Parens           := False;
   end Reset_Style_Check_Options;

   ---------------------
   -- RM_Column_Check --
   ---------------------

   function RM_Column_Check return Boolean is
   begin
      return Style_Check and Style_Check_Layout;
   end RM_Column_Check;

   ------------------------------
   -- Save_Style_Check_Options --
   ------------------------------

   procedure Save_Style_Check_Options (Options : out Style_Check_Options) is
      P : Natural := 0;

      procedure Add (C : Character; S : Boolean);
      --  Add given character C to string if switch S is true

      procedure Add_Nat (N : Nat);
      --  Add given natural number to string

      ---------
      -- Add --
      ---------

      procedure Add (C : Character; S : Boolean) is
      begin
         if S then
            P := P + 1;
            Options (P) := C;
         end if;
      end Add;

      -------------
      -- Add_Nat --
      -------------

      procedure Add_Nat (N : Nat) is
      begin
         if N > 9 then
            Add_Nat (N / 10);
         end if;

         P := P + 1;
         Options (P) := Character'Val (Character'Pos ('0') + N mod 10);
      end Add_Nat;

   --  Start of processing for Save_Style_Check_Options

   begin
      for K in Options'Range loop
         Options (K) := ' ';
      end loop;

      Add (Character'Val (Style_Check_Indentation + Character'Pos ('0')),
           Style_Check_Indentation /= 0);

      Add ('a', Style_Check_Attribute_Casing);
      Add ('A', Style_Check_Array_Attribute_Index);
      Add ('b', Style_Check_Blanks_At_End);
      Add ('B', Style_Check_Boolean_And_Or);

      if Style_Check_Comments_Spacing = 2 then
         Add ('c', Style_Check_Comments);
      elsif Style_Check_Comments_Spacing = 1 then
         Add ('C', Style_Check_Comments);
      end if;

      Add ('d', Style_Check_DOS_Line_Terminator);
      Add ('e', Style_Check_End_Labels);
      Add ('f', Style_Check_Form_Feeds);
      Add ('h', Style_Check_Horizontal_Tabs);
      Add ('i', Style_Check_If_Then_Layout);
      Add ('I', Style_Check_Mode_In);
      Add ('k', Style_Check_Keyword_Casing);
      Add ('l', Style_Check_Layout);
      Add ('n', Style_Check_Standard);
      Add ('o', Style_Check_Order_Subprograms);
      Add ('O', Style_Check_Missing_Overriding);
      Add ('p', Style_Check_Pragma_Casing);
      Add ('r', Style_Check_References);
      Add ('s', Style_Check_Specs);
      Add ('S', Style_Check_Separate_Stmt_Lines);
      Add ('t', Style_Check_Tokens);
      Add ('u', Style_Check_Blank_Lines);
      Add ('x', Style_Check_Xtra_Parens);

      if Style_Check_Max_Line_Length then
         P := P + 1;
         Options (P) := 'M';
         Add_Nat (Style_Max_Line_Length);
      end if;

      if Style_Check_Max_Nesting_Level then
         P := P + 1;
         Options (P) := 'L';
         Add_Nat (Style_Max_Nesting_Level);
      end if;

      pragma Assert (P <= Options'Last);

      while P < Options'Last loop
         P := P + 1;
         Options (P) := ' ';
      end loop;
   end Save_Style_Check_Options;

   -------------------------------------
   -- Set_Default_Style_Check_Options --
   -------------------------------------

   procedure Set_Default_Style_Check_Options is
   begin
      Reset_Style_Check_Options;
      Set_Style_Check_Options (Default_Style);
   end Set_Default_Style_Check_Options;

   ----------------------------------
   -- Set_GNAT_Style_Check_Options --
   ----------------------------------

   procedure Set_GNAT_Style_Check_Options is
   begin
      Reset_Style_Check_Options;
      Set_Style_Check_Options (GNAT_Style);
   end Set_GNAT_Style_Check_Options;

   -----------------------------
   -- Set_Style_Check_Options --
   -----------------------------

   --  Version used when no error checking is required

   procedure Set_Style_Check_Options (Options : String) is
      OK : Boolean;
      EC : Natural;
      pragma Warnings (Off, EC);
   begin
      Set_Style_Check_Options (Options, OK, EC);
      pragma Assert (OK);
   end Set_Style_Check_Options;

   --  Normal version with error checking

   procedure Set_Style_Check_Options
     (Options  : String;
      OK       : out Boolean;
      Err_Col  : out Natural)
   is
      C : Character;

      On : Boolean := True;
      --  Set to False if minus encountered
      --  Set to True if plus encountered

      Last_Option : Character := ' ';
      --  Set to last character encountered

      procedure Add_Img (N : Natural);
      --  Concatenates image of N at end of Style_Msg_Buf

      procedure Bad_Style_Switch (Msg : String);
      --  Called if bad style switch found. Msg is set in Style_Msg_Buf and
      --  Style_Msg_Len. OK is set False.

      -------------
      -- Add_Img --
      -------------

      procedure Add_Img (N : Natural) is
      begin
         if N >= 10 then
            Add_Img (N / 10);
         end if;

         Style_Msg_Len := Style_Msg_Len + 1;
         Style_Msg_Buf (Style_Msg_Len) :=
           Character'Val (N mod 10 + Character'Pos ('0'));
      end Add_Img;

      ----------------------
      -- Bad_Style_Switch --
      ----------------------

      procedure Bad_Style_Switch (Msg : String) is
      begin
         OK := False;
         Style_Msg_Len := Msg'Length;
         Style_Msg_Buf (1 .. Style_Msg_Len) := Msg;
      end Bad_Style_Switch;

   --  Start of processing for Set_Style_Check_Options

   begin
      Err_Col := Options'First;
      while Err_Col <= Options'Last loop
         C := Options (Err_Col);
         Last_Option := C;
         Err_Col := Err_Col + 1;

         --  Turning switches on

         if On then
            case C is

            when '+' =>
               null;

            when '-' =>
               On := False;

            when '0' .. '9' =>
               Style_Check_Indentation :=
                 Character'Pos (C) - Character'Pos ('0');

            when 'a' =>
               Style_Check_Attribute_Casing      := True;

            when 'A' =>
               Style_Check_Array_Attribute_Index := True;

            when 'b' =>
               Style_Check_Blanks_At_End         := True;

            when 'B' =>
               Style_Check_Boolean_And_Or        := True;

            when 'c' =>
               Style_Check_Comments              := True;
               Style_Check_Comments_Spacing      := 2;

            when 'C' =>
               Style_Check_Comments              := True;
               Style_Check_Comments_Spacing      := 1;

            when 'd' =>
               Style_Check_DOS_Line_Terminator   := True;

            when 'e' =>
               Style_Check_End_Labels            := True;

            when 'f' =>
               Style_Check_Form_Feeds            := True;

            when 'g' =>
               Set_GNAT_Style_Check_Options;

            when 'h' =>
               Style_Check_Horizontal_Tabs       := True;

            when 'i' =>
               Style_Check_If_Then_Layout        := True;

            when 'I' =>
               Style_Check_Mode_In               := True;

            when 'k' =>
               Style_Check_Keyword_Casing        := True;

            when 'l' =>
               Style_Check_Layout                := True;

            when 'L' =>
               Style_Max_Nesting_Level := 0;

               if Err_Col > Options'Last
                 or else Options (Err_Col) not in '0' .. '9'
               then
                  Bad_Style_Switch ("invalid nesting level");
                  return;
               end if;

               loop
                  Style_Max_Nesting_Level :=
                    Style_Max_Nesting_Level * 10 +
                      Character'Pos (Options (Err_Col)) - Character'Pos ('0');

                  if Style_Max_Nesting_Level > 999 then
                     Bad_Style_Switch
                       ("max nesting level (999) exceeded in style check");
                     return;
                  end if;

                  Err_Col := Err_Col + 1;
                  exit when Err_Col > Options'Last
                    or else Options (Err_Col) not in '0' .. '9';
               end loop;

               Style_Check_Max_Nesting_Level := Style_Max_Nesting_Level /= 0;

            when 'm' =>
               Style_Check_Max_Line_Length       := True;
               Style_Max_Line_Length             := 79;

            when 'M' =>
               Style_Max_Line_Length             := 0;

               if Err_Col > Options'Last
                 or else Options (Err_Col) not in '0' .. '9'
               then
                  Bad_Style_Switch
                    ("invalid line length in style check");
                  return;
               end if;

               loop
                  Style_Max_Line_Length :=
                    Style_Max_Line_Length * 10 +
                      Character'Pos (Options (Err_Col)) - Character'Pos ('0');

                  if Style_Max_Line_Length > Int (Max_Line_Length) then
                     OK := False;
                     Style_Msg_Buf (1 .. 27) := "max line length allowed is ";
                     Style_Msg_Len := 27;
                     Add_Img (Natural (Max_Line_Length));
                     return;
                  end if;

                  Err_Col := Err_Col + 1;
                  exit when Err_Col > Options'Last
                    or else Options (Err_Col) not in '0' .. '9';
               end loop;

               Style_Check_Max_Line_Length       := Style_Max_Line_Length /= 0;

            when 'n' =>
               Style_Check_Standard              := True;

            when 'N' =>
               Reset_Style_Check_Options;

            when 'o' =>
               Style_Check_Order_Subprograms     := True;

            when 'O' =>
               Style_Check_Missing_Overriding    := True;

            when 'p' =>
               Style_Check_Pragma_Casing         := True;

            when 'r' =>
               Style_Check_References            := True;

            when 's' =>
               Style_Check_Specs                 := True;

            when 'S' =>
               Style_Check_Separate_Stmt_Lines   := True;

            when 't' =>
               Style_Check_Tokens                := True;

            when 'u' =>
               Style_Check_Blank_Lines           := True;

            when 'x' =>
               Style_Check_Xtra_Parens           := True;

            when 'y' =>
               Set_Default_Style_Check_Options;

            when ' ' =>
               null;

            when others =>
               Err_Col := Err_Col - 1;
               Bad_Style_Switch ("invalid style switch: " & C);
               return;
            end case;

         --  Turning switches off

         else
            case C is

            when '+' =>
               On := True;

            when '-' =>
               null;

            when '0' .. '9' =>
               Style_Check_Indentation := 0;

            when 'a' =>
               Style_Check_Attribute_Casing      := False;

            when 'A' =>
               Style_Check_Array_Attribute_Index := False;

            when 'b' =>
               Style_Check_Blanks_At_End         := False;

            when 'B' =>
               Style_Check_Boolean_And_Or        := False;

            when 'c' | 'C' =>
               Style_Check_Comments              := False;

            when 'd' =>
               Style_Check_DOS_Line_Terminator   := False;

            when 'e' =>
               Style_Check_End_Labels            := False;

            when 'f' =>
               Style_Check_Form_Feeds            := False;

            when 'g' =>
               Reset_Style_Check_Options;

            when 'h' =>
               Style_Check_Horizontal_Tabs       := False;

            when 'i' =>
               Style_Check_If_Then_Layout        := False;

            when 'I' =>
               Style_Check_Mode_In               := False;

            when 'k' =>
               Style_Check_Keyword_Casing        := False;

            when 'l' =>
               Style_Check_Layout                := False;

            when 'L' =>
               Style_Max_Nesting_Level := 0;

            when 'm' =>
               Style_Check_Max_Line_Length       := False;

            when 'M' =>
               Style_Max_Line_Length             := 0;
               Style_Check_Max_Line_Length       := False;

            when 'n' =>
               Style_Check_Standard              := False;

            when 'o' =>
               Style_Check_Order_Subprograms     := False;

            when 'O' =>
               Style_Check_Missing_Overriding    := False;

            when 'p' =>
               Style_Check_Pragma_Casing         := False;

            when 'r' =>
               Style_Check_References            := False;

            when 's' =>
               Style_Check_Specs                 := False;

            when 'S' =>
               Style_Check_Separate_Stmt_Lines   := False;

            when 't' =>
               Style_Check_Tokens                := False;

            when 'u' =>
               Style_Check_Blank_Lines           := False;

            when 'x' =>
               Style_Check_Xtra_Parens           := False;

            when ' ' =>
               null;

            when others =>
               Err_Col := Err_Col - 1;
               Bad_Style_Switch ("invalid style switch: " & C);
               return;
            end case;
         end if;
      end loop;

      --  Turn on style checking if other than N at end of string

      Style_Check := (Last_Option /= 'N');
      OK := True;
   end Set_Style_Check_Options;
end Stylesw;