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1 281 jeremybenn
------------------------------------------------------------------------------
2
--                                                                          --
3
--                         GNAT COMPILER COMPONENTS                         --
4
--                                                                          --
5
--                              I M P U N I T                               --
6
--                                                                          --
7
--                                 B o d y                                  --
8
--                                                                          --
9
--           Copyright (C) 2000-2009, Free Software Foundation, Inc.        --
10
--                                                                          --
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.  See the GNU General Public License --
17
-- for  more details.  You should have  received  a copy of the GNU General --
18
-- Public License  distributed with GNAT; see file COPYING3.  If not, go to --
19
-- http://www.gnu.org/licenses for a complete copy of the license.          --
20
--                                                                          --
21
-- GNAT was originally developed  by the GNAT team at  New York University. --
22
-- Extensive contributions were provided by Ada Core Technologies Inc.      --
23
--                                                                          --
24
------------------------------------------------------------------------------
25
 
26
with Atree;    use Atree;
27
with Errout;   use Errout;
28
with Sinfo;    use Sinfo;
29
with Fname.UF; use Fname.UF;
30
with Lib;      use Lib;
31
with Namet;    use Namet;
32
with Uname;    use Uname;
33
 
34
--  Note: this package body is used by GPS and GNATBench to supply a list of
35
--  entries for help on available library routines.
36
 
37
package body Impunit is
38
 
39
   subtype File_Name_8 is String (1 .. 8);
40
   type File_List is array (Nat range <>) of File_Name_8;
41
 
42
   ------------------
43
   -- Ada 95 Units --
44
   ------------------
45
 
46
   --  The following is a giant string list containing the names of all non-
47
   --  implementation internal files, i.e. the complete list of files for
48
   --  internal units which a program may legitimately WITH when operating in
49
   --  either Ada 95 or Ada 05 mode.
50
 
51
   --  Note that this list should match the list of units documented in the
52
   --  "GNAT Library" section of the GNAT Reference Manual. A unit listed here
53
   --  must either be documented in that section or described in the Ada RM.
54
 
55
   Non_Imp_File_Names_95 : constant File_List := (
56
 
57
   ------------------------------------------------------
58
   -- Ada Hierarchy Units from Ada-83 Reference Manual --
59
   ------------------------------------------------------
60
 
61
     "a-astaco",    -- Ada.Asynchronous_Task_Control
62
     "a-calend",    -- Ada.Calendar
63
     "a-chahan",    -- Ada.Characters.Handling
64
     "a-charac",    -- Ada.Characters
65
     "a-chlat1",    -- Ada.Characters.Latin_1
66
     "a-comlin",    -- Ada.Command_Line
67
     "a-decima",    -- Ada.Decimal
68
     "a-direio",    -- Ada.Direct_IO
69
     "a-dynpri",    -- Ada.Dynamic_Priorities
70
     "a-except",    -- Ada.Exceptions
71
     "a-finali",    -- Ada.Finalization
72
     "a-flteio",    -- Ada.Float_Text_IO
73
     "a-fwteio",    -- Ada.Float_Wide_Text_IO
74
     "a-inteio",    -- Ada.Integer_Text_IO
75
     "a-interr",    -- Ada.Interrupts
76
     "a-intnam",    -- Ada.Interrupts.Names
77
     "a-ioexce",    -- Ada.IO_Exceptions
78
     "a-iwteio",    -- Ada.Integer_Wide_Text_IO
79
     "a-ncelfu",    -- Ada.Numerics.Complex_Elementary_Functions
80
     "a-ngcefu",    -- Ada.Numerics.Generic_Complex_Elementary_Functions
81
     "a-ngcoty",    -- Ada.Numerics.Generic_Complex_Types
82
     "a-ngelfu",    -- Ada.Numerics.Generic_Elementary_Functions
83
     "a-nucoty",    -- Ada.Numerics.Complex_Types
84
     "a-nudira",    -- Ada.Numerics.Discrete_Random
85
     "a-nuelfu",    -- Ada.Numerics.Elementary_Functions
86
     "a-nuflra",    -- Ada.Numerics.Float_Random
87
     "a-numeri",    -- Ada.Numerics
88
     "a-reatim",    -- Ada.Real_Time
89
     "a-sequio",    -- Ada.Sequential_IO
90
     "a-stmaco",    -- Ada.Strings.Maps.Constants
91
     "a-storio",    -- Ada.Storage_IO
92
     "a-strbou",    -- Ada.Strings.Bounded
93
     "a-stream",    -- Ada.Streams
94
     "a-strfix",    -- Ada.Strings.Fixed
95
     "a-string",    -- Ada.Strings
96
     "a-strmap",    -- Ada.Strings.Maps
97
     "a-strunb",    -- Ada.Strings.Unbounded
98
     "a-ststio",    -- Ada.Streams.Stream_IO
99
     "a-stwibo",    -- Ada.Strings.Wide_Bounded
100
     "a-stwifi",    -- Ada.Strings.Wide_Fixed
101
     "a-stwima",    -- Ada.Strings.Wide_Maps
102
     "a-stwiun",    -- Ada.Strings.Wide_Unbounded
103
     "a-swmwco",    -- Ada.Strings.Wide_Maps.Wide_Constants
104
     "a-sytaco",    -- Ada.Synchronous_Task_Control
105
     "a-tags  ",    -- Ada.Tags
106
     "a-tasatt",    -- Ada.Task_Attributes
107
     "a-taside",    -- Ada.Task_Identification
108
     "a-teioed",    -- Ada.Text_IO.Editing
109
     "a-textio",    -- Ada.Text_IO
110
     "a-ticoio",    -- Ada.Text_IO.Complex_IO
111
     "a-titest",    -- Ada.Text_IO.Text_Streams
112
     "a-unccon",    -- Ada.Unchecked_Conversion
113
     "a-uncdea",    -- Ada.Unchecked_Deallocation
114
     "a-witeio",    -- Ada.Wide_Text_IO
115
     "a-wtcoio",    -- Ada.Wide_Text_IO.Complex_IO
116
     "a-wtedit",    -- Ada.Wide_Text_IO.Editing
117
     "a-wttest",    -- Ada.Wide_Text_IO.Text_Streams
118
 
119
   -------------------------------------------------
120
   -- RM Required Additions to Ada for GNAT Types --
121
   -------------------------------------------------
122
 
123
     "a-lfteio",    -- Ada.Long_Float_Text_IO
124
     "a-lfwtio",    -- Ada.Long_Float_Wide_Text_IO
125
     "a-liteio",    -- Ada.Long_Integer_Text_IO
126
     "a-liwtio",    -- Ada.Long_Integer_Wide_Text_IO
127
     "a-llftio",    -- Ada.Long_Long_Float_Text_IO
128
     "a-llfwti",    -- Ada.Long_Long_Float_Wide_Text_IO
129
     "a-llitio",    -- Ada.Long_Long_Integer_Text_IO
130
     "a-lliwti",    -- Ada.Long_Long_Integer_Wide_Text_IO
131
     "a-nlcefu",    -- Ada.Long_Complex_Elementary_Functions
132
     "a-nlcoty",    -- Ada.Numerics.Long_Complex_Types
133
     "a-nlelfu",    -- Ada.Numerics.Long_Elementary_Functions
134
     "a-nllcef",    -- Ada.Long_Long_Complex_Elementary_Functions
135
     "a-nllefu",    -- Ada.Numerics.Long_Long_Elementary_Functions
136
     "a-nllcty",    -- Ada.Numerics.Long_Long_Complex_Types
137
     "a-nscefu",    -- Ada.Short_Complex_Elementary_Functions
138
     "a-nscoty",    -- Ada.Numerics.Short_Complex_Types
139
     "a-nselfu",    -- Ada.Numerics.Short_Elementary_Functions
140
     "a-sfteio",    -- Ada.Short_Float_Text_IO
141
     "a-sfwtio",    -- Ada.Short_Float_Wide_Text_IO
142
     "a-siteio",    -- Ada.Short_Integer_Text_IO
143
     "a-siwtio",    -- Ada.Short_Integer_Wide_Text_IO
144
     "a-ssitio",    -- Ada.Short_Short_Integer_Text_IO
145
     "a-ssiwti",    -- Ada.Short_Short_Integer_Wide_Text_IO
146
 
147
   -----------------------------------
148
   -- GNAT Defined Additions to Ada --
149
   -----------------------------------
150
 
151
     "a-calcon",    -- Ada.Calendar.Conversions
152
     "a-chlat9",    -- Ada.Characters.Latin_9
153
     "a-clrefi",    -- Ada.Command_Line.Response_File
154
     "a-colien",    -- Ada.Command_Line.Environment
155
     "a-colire",    -- Ada.Command_Line.Remove
156
     "a-cwila1",    -- Ada.Characters.Wide_Latin_1
157
     "a-cwila9",    -- Ada.Characters.Wide_Latin_9
158
     "a-diocst",    -- Ada.Direct_IO.C_Streams
159
     "a-einuoc",    -- Ada.Exceptions.Is_Null_Occurrence
160
     "a-elchha",    -- Ada.Exceptions.Last_Chance_Handler
161
     "a-exctra",    -- Ada.Exceptions.Traceback
162
     "a-siocst",    -- Ada.Sequential_IO.C_Streams
163
     "a-ssicst",    -- Ada.Streams.Stream_IO.C_Streams
164
     "a-suteio",    -- Ada.Strings.Unbounded.Text_IO
165
     "a-swuwti",    -- Ada.Strings.Wide_Unbounded.Wide_Text_IO
166
     "a-tiocst",    -- Ada.Text_IO.C_Streams
167
     "a-wtcstr",    -- Ada.Wide_Text_IO.C_Streams
168
 
169
      --  Note: strictly the next two should be Ada 2005 units, but it seems
170
      --  harmless (and useful) to make then available in Ada 95 mode, since
171
      --  they only deal with Wide_Character, not Wide_Wide_Character.
172
 
173
     "a-wichun",    -- Ada.Wide_Characters.Unicode
174
     "a-widcha",    -- Ada.Wide_Characters
175
 
176
   ---------------------------
177
   -- GNAT Special IO Units --
178
   ---------------------------
179
 
180
   --  As further explained elsewhere (see Sem_Ch10), the internal packages of
181
   --  Text_IO and Wide_Text_IO are actually implemented as separate children,
182
   --  but this fact is intended to be hidden from the user completely. Any
183
   --  attempt to WITH one of these units will be diagnosed as an error later
184
   --  on, but for now we do not consider these internal implementation units
185
   --  (if we did, then we would get a junk warning which would be confusing
186
   --  and unnecessary, given that we generate a clear error message).
187
 
188
     "a-tideio",    -- Ada.Text_IO.Decimal_IO
189
     "a-tienio",    -- Ada.Text_IO.Enumeration_IO
190
     "a-tifiio",    -- Ada.Text_IO.Fixed_IO
191
     "a-tiflio",    -- Ada.Text_IO.Float_IO
192
     "a-tiinio",    -- Ada.Text_IO.Integer_IO
193
     "a-tiinio",    -- Ada.Text_IO.Integer_IO
194
     "a-timoio",    -- Ada.Text_IO.Modular_IO
195
     "a-wtdeio",    -- Ada.Wide_Text_IO.Decimal_IO
196
     "a-wtenio",    -- Ada.Wide_Text_IO.Enumeration_IO
197
     "a-wtfiio",    -- Ada.Wide_Text_IO.Fixed_IO
198
     "a-wtflio",    -- Ada.Wide_Text_IO.Float_IO
199
     "a-wtinio",    -- Ada.Wide_Text_IO.Integer_IO
200
     "a-wtmoio",    -- Ada.Wide_Text_IO.Modular_IO
201
 
202
   ------------------------
203
   -- GNAT Library Units --
204
   ------------------------
205
 
206
     "g-altive",    -- GNAT.Altivec
207
     "g-altcon",    -- GNAT.Altivec.Conversions
208
     "g-alveop",    -- GNAT.Altivec.Vector_Operations
209
     "g-alvety",    -- GNAT.Altivec.Vector_Types
210
     "g-alvevi",    -- GNAT.Altivec.Vector_Views
211
     "g-arrspl",    -- GNAT.Array_Split
212
     "g-awk   ",    -- GNAT.AWK
213
     "g-boubuf",    -- GNAT.Bounded_Buffers
214
     "g-boumai",    -- GNAT.Bounded_Mailboxes
215
     "g-bubsor",    -- GNAT.Bubble_Sort
216
     "g-busora",    -- GNAT.Bubble_Sort_A
217
     "g-busorg",    -- GNAT.Bubble_Sort_G
218
     "g-byorma",    -- GNAT.Byte_Order_Mark
219
     "g-bytswa",    -- GNAT.Byte_Swapping
220
     "g-calend",    -- GNAT.Calendar
221
     "g-catiio",    -- GNAT.Calendar.Time_IO
222
     "g-casuti",    -- GNAT.Case_Util
223
     "g-cgi   ",    -- GNAT.CGI
224
     "g-cgicoo",    -- GNAT.CGI.Cookie
225
     "g-cgideb",    -- GNAT.CGI.Debug
226
     "g-comlin",    -- GNAT.Command_Line
227
     "g-comver",    -- GNAT.Compiler_Version
228
     "g-crc32 ",    -- GNAT.CRC32
229
     "g-ctrl_c",    -- GNAT.Ctrl_C
230
     "g-curexc",    -- GNAT.Current_Exception
231
     "g-debpoo",    -- GNAT.Debug_Pools
232
     "g-debuti",    -- GNAT.Debug_Utilities
233
     "g-decstr",    -- GNAT.Decode_String
234
     "g-deutst",    -- GNAT.Decode_UTF8_String
235
     "g-dirope",    -- GNAT.Directory_Operations
236
     "g-diopit",    -- GNAT.Directory_Operations.Iteration
237
     "g-dynhta",    -- GNAT.Dynamic_HTables
238
     "g-dyntab",    -- GNAT.Dynamic_Tables
239
     "g-encstr",    -- GNAT.Encode_String
240
     "g-enutst",    -- GNAT.Encode_UTF8_String
241
     "g-excact",    -- GNAT.Exception_Actions
242
     "g-except",    -- GNAT.Exceptions
243
     "g-exctra",    -- GNAT.Exception_Traces
244
     "g-expect",    -- GNAT.Expect
245
     "g-flocon",    -- GNAT.Float_Control
246
     "g-heasor",    -- GNAT.Heap_Sort
247
     "g-hesora",    -- GNAT.Heap_Sort_A
248
     "g-hesorg",    -- GNAT.Heap_Sort_G
249
     "g-htable",    -- GNAT.Htable
250
     "g-io    ",    -- GNAT.IO
251
     "g-io_aux",    -- GNAT.IO_Aux
252
     "g-locfil",    -- GNAT.Lock_Files
253
     "g-md5   ",    -- GNAT.MD5
254
     "g-memdum",    -- GNAT.Memory_Dump
255
     "g-moreex",    -- GNAT.Most_Recent_Exception
256
     "g-os_lib",    -- GNAT.Os_Lib
257
     "g-pehage",    -- GNAT.Perfect_Hash_Generators
258
     "g-rannum",    -- GNAT.Random_Numbers
259
     "g-regexp",    -- GNAT.Regexp
260
     "g-regist",    -- GNAT.Registry
261
     "g-regpat",    -- GNAT.Regpat
262
     "g-semaph",    -- GNAT.Semaphores
263
     "g-sercom",    -- GNAT.Serial_Communications
264
     "g-sestin",    -- GNAT.Secondary_Stack_Info
265
     "g-sha1  ",    -- GNAT.SHA1
266
     "g-sha224",    -- GNAT.SHA224
267
     "g-sha256",    -- GNAT.SHA256
268
     "g-sha384",    -- GNAT.SHA384
269
     "g-sha512",    -- GNAT.SHA512
270
     "g-signal",    -- GNAT.Signals
271
     "g-socket",    -- GNAT.Sockets
272
     "g-souinf",    -- GNAT.Source_Info
273
     "g-speche",    -- GNAT.Spell_Checker
274
     "g-spchge",    -- GNAT.Spell_Checker_Generic
275
     "g-spitbo",    -- GNAT.Spitbol
276
     "g-spipat",    -- GNAT.Spitbol.Patterns
277
     "g-sptabo",    -- GNAT.Spitbol.Table_Boolean
278
     "g-sptain",    -- GNAT.Spitbol.Table_Integer
279
     "g-sptavs",    -- GNAT.Spitbol.Table_Vstring
280
     "g-string",    -- GNAT.Strings
281
     "g-strspl",    -- GNAT.String_Split
282
     "g-sse   ",    -- GNAT.SSE
283
     "g-ssvety",    -- GNAT.SSE.Vector_Types
284
     "g-table ",    -- GNAT.Table
285
     "g-tasloc",    -- GNAT.Task_Lock
286
     "g-thread",    -- GNAT.Threads
287
     "g-timsta",    -- GNAT.Time_Stamp
288
     "g-traceb",    -- GNAT.Traceback
289
     "g-trasym",    -- GNAT.Traceback.Symbolic
290
     "g-utf_32",    -- GNAT.UTF_32
291
     "g-u3spch",    -- GNAT.UTF_32_Spelling_Checker
292
     "g-wispch",    -- GNAT.Wide_Spelling_Checker
293
     "g-wistsp",    -- GNAT.Wide_String_Split
294
 
295
   -----------------------------------------------------
296
   -- Interface Hierarchy Units from Reference Manual --
297
   -----------------------------------------------------
298
 
299
     "i-c     ",    -- Interfaces.C
300
     "i-cobol ",    -- Interfaces.Cobol
301
     "i-cpoint",    -- Interfaces.C.Pointers
302
     "i-cstrin",    -- Interfaces.C.Strings
303
     "i-fortra",    -- Interfaces.Fortran
304
 
305
   ------------------------------------------
306
   -- GNAT Defined Additions to Interfaces --
307
   ------------------------------------------
308
 
309
     "i-cexten",    -- Interfaces.C.Extensions
310
     "i-cil   ",    -- Interfaces.CIL
311
     "i-cilobj",    -- Interfaces.CIL.Object
312
     "i-cpp   ",    -- Interfaces.CPP
313
     "i-cstrea",    -- Interfaces.C.Streams
314
     "i-java  ",    -- Interfaces.Java
315
     "i-javjni",    -- Interfaces.Java.JNI
316
     "i-pacdec",    -- Interfaces.Packed_Decimal
317
     "i-vxwoio",    -- Interfaces.VxWorks.IO
318
     "i-vxwork",    -- Interfaces.VxWorks
319
 
320
   --------------------------------------------------
321
   -- System Hierarchy Units from Reference Manual --
322
   --------------------------------------------------
323
 
324
     "s-atacco",    -- System.Address_To_Access_Conversions
325
     "s-maccod",    -- System.Machine_Code
326
     "s-rpc   ",    -- System.Rpc
327
     "s-stoele",    -- System.Storage_Elements
328
     "s-stopoo",    -- System.Storage_Pools
329
 
330
   --------------------------------------
331
   -- GNAT Defined Additions to System --
332
   --------------------------------------
333
 
334
     "s-addima",    -- System.Address_Image
335
     "s-assert",    -- System.Assertions
336
     "s-memory",    -- System.Memory
337
     "s-parint",    -- System.Partition_Interface
338
     "s-pooglo",    -- System.Pool_Global
339
     "s-pooloc",    -- System.Pool_Local
340
     "s-restri",    -- System.Restrictions
341
     "s-rident",    -- System.Rident
342
     "s-ststop",    -- System.Strings.Stream_Ops
343
     "s-tasinf",    -- System.Task_Info
344
     "s-wchcnv",    -- System.Wch_Cnv
345
     "s-wchcon");   -- System.Wch_Con
346
 
347
   --------------------
348
   -- Ada 2005 Units --
349
   --------------------
350
 
351
   --  The following units should be used only in Ada 05 mode
352
 
353
   Non_Imp_File_Names_05 : constant File_List := (
354
 
355
   --------------------------------------------------------
356
   -- Ada Hierarchy Units from Ada 2005 Reference Manual --
357
   --------------------------------------------------------
358
 
359
     "a-assert",    -- Ada.Assertions
360
     "a-calari",    -- Ada.Calendar.Arithmetic
361
     "a-calfor",    -- Ada.Calendar.Formatting
362
     "a-catizo",    -- Ada.Calendar.Time_Zones
363
     "a-cdlili",    -- Ada.Containers.Doubly_Linked_Lists
364
     "a-cgarso",    -- Ada.Containers.Generic_Array_Sort
365
     "a-cgcaso",    -- Ada.Containers.Generic_Constrained_Array_Sort
366
     "a-chacon",    -- Ada.Characters.Conversions
367
     "a-cidlli",    -- Ada.Containers.Indefinite_Doubly_Linked_Lists
368
     "a-cihama",    -- Ada.Containers.Indefinite_Hashed_Maps
369
     "a-cihase",    -- Ada.Containers.Indefinite_Hashed_Sets
370
     "a-ciorma",    -- Ada.Containers.Indefinite_Ordered_Maps
371
     "a-ciorse",    -- Ada.Containers.Indefinite_Ordered_Sets
372
     "a-cohama",    -- Ada.Containers.Hashed_Maps
373
     "a-cohase",    -- Ada.Containers.Hashed_Sets
374
     "a-coinve",    -- Ada.Containers.Indefinite_Vectors
375
     "a-contai",    -- Ada.Containers
376
     "a-convec",    -- Ada.Containers.Vectors
377
     "a-coorma",    -- Ada.Containers.Ordered_Maps
378
     "a-coorse",    -- Ada.Containers.Ordered_Sets
379
     "a-coteio",    -- Ada.Complex_Text_IO
380
     "a-direct",    -- Ada.Directories
381
     "a-diroro",    -- Ada.Dispatching.Round_Robin
382
     "a-disedf",    -- Ada.Dispatching.EDF
383
     "a-dispat",    -- Ada.Dispatching
384
     "a-envvar",    -- Ada.Environment_Variables
385
     "a-exetim",    -- Ada.Execution_Time
386
     "a-extiti",    -- Ada.Execution_Time.Timers
387
     "a-rttiev",    -- Ada.Real_Time.Timing_Events
388
     "a-ngcoar",    -- Ada.Numerics.Generic_Complex_Arrays
389
     "a-ngrear",    -- Ada.Numerics.Generic_Real_Arrays
390
     "a-nucoar",    -- Ada.Numerics.Complex_Arrays
391
     "a-nurear",    -- Ada.Numerics.Real_Arrays
392
     "a-stboha",    -- Ada.Strings.Bounded.Hash
393
     "a-stfiha",    -- Ada.Strings.Fixed.Hash
394
     "a-strhas",    -- Ada.Strings.Hash
395
     "a-stunha",    -- Ada.Strings.Unbounded.Hash
396
     "a-stwiha",    -- Ada.Strings.Wide_Hash
397
     "a-stzbou",    -- Ada.Strings.Wide_Wide_Bounded
398
     "a-stzfix",    -- Ada.Strings.Wide_Wide_Fixed
399
     "a-stzhas",    -- Ada.Strings.Wide_Wide_Hash
400
     "a-stzmap",    -- Ada.Strings.Wide_Wide_Maps
401
     "a-stzunb",    -- Ada.Strings.Wide_Wide_Unbounded
402
     "a-swbwha",    -- Ada.Strings.Wide_Bounded.Wide_Hash
403
     "a-swfwha",    -- Ada.Strings.Wide_Fixed.Wide_Hash
404
     "a-swuwha",    -- Ada.Strings.Wide_Unbounded.Wide_Hash
405
     "a-szbzha",    -- Ada.Strings.Wide_Wide_Bounded.Wide_Wide_Hash
406
     "a-szfzha",    -- Ada.Strings.Wide_Wide_Fixed.Wide_Wide_Hash
407
     "a-szmzco",    -- Ada.Strings.Wide_Wide_Maps.Wide_Wide_Constants
408
     "a-szuzha",    -- Ada.Strings.Wide_Wide_Unbounded.Wide_Wide_Hash
409
     "a-taster",    -- Ada.Task_Termination
410
     "a-tgdico",    -- Ada.Tags.Generic_Dispatching_Constructor
411
     "a-tiboio",    -- Ada.Text_IO.Bounded_IO
412
     "a-tiunio",    -- Ada.Text_IO.Unbounded_IO
413
     "a-wichun",    -- Ada.Wide_Characters.Unicode
414
     "a-wwboio",    -- Ada.Wide_Text_IO.Wide_Bounded_IO
415
     "a-wwunio",    -- Ada.Wide_Text_IO.Wide_Unbounded_IO
416
     "a-zchara",    -- Ada.Wide_Wide_Characters
417
     "a-ztcoio",    -- Ada.Wide_Wide_Text_IO.Complex_IO
418
     "a-ztedit",    -- Ada.Wide_Wide_Text_IO.Editing
419
     "a-zttest",    -- Ada.Wide_Wide_Text_IO.Text_Streams
420
     "a-ztexio",    -- Ada.Wide_Wide_Text_IO
421
     "a-zzboio",    -- Ada.Wide_Wide_Text_IO.Wide_Wide_Bounded_IO
422
     "a-zzunio",    -- Ada.Wide_Wide_Text_IO.Wide_Wide_Unbounded_IO
423
 
424
   ------------------------------------------------------
425
   -- RM Required Additions to Ada 2005 for GNAT Types --
426
   ------------------------------------------------------
427
 
428
     "a-lcteio",    -- Ada.Long_Complex_Text_IO
429
     "a-lfztio",    -- Ada.Long_Float_Wide_Wide_Text_IO
430
     "a-liztio",    -- Ada.Long_Integer_Wide_Wide_Text_IO
431
     "a-llctio",    -- Ada.Long_Long_Complex_Text_IO
432
     "a-llfzti",    -- Ada.Long_Long_Float_Wide_Wide_Text_IO
433
     "a-llizti",    -- Ada.Long_Long_Integer_Wide_Wide_Text_IO
434
     "a-nlcoar",    -- Ada.Numerics.Long_Complex_Arrays
435
     "a-nllcar",    -- Ada.Numerics.Long_Long_Complex_Arrays
436
     "a-nllrar",    -- Ada.Numerics.Long_Long_Real_Arrays
437
     "a-nlrear",    -- Ada.Numerics.Long_Real_Arrays
438
     "a-scteio",    -- Ada.Short_Complex_Text_IO
439
     "a-sfztio",    -- Ada.Short_Float_Wide_Wide_Text_IO
440
     "a-siztio",    -- Ada.Short_Integer_Wide_Wide_Text_IO
441
     "a-ssizti",    -- Ada.Short_Short_Integer_Wide_Wide_Text_IO
442
     "a-ztcstr",    -- Ada.Wide_Wide_Text_IO.C_Streams
443
 
444
   ----------------------------------------
445
   -- GNAT Defined Additions to Ada 2005 --
446
   ----------------------------------------
447
 
448
     "a-cgaaso",    -- Ada.Containers.Generic_Anonymous_Array_Sort
449
     "a-chzla1",    -- Ada.Characters.Wide_Wide_Latin_1
450
     "a-chzla9",    -- Ada.Characters.Wide_Wide_Latin_9
451
     "a-ciormu",    -- Ada.Containers.Indefinite_Ordered_Multisets
452
     "a-coormu",    -- Ada.Containers.Ordered_Multisets
453
     "a-crdlli",    -- Ada.Containers.Restricted_Doubly_Linked_Lists
454
     "a-secain",    -- Ada.Strings.Equal_Case_Insensitive
455
     "a-shcain",    -- Ada.Strings.Hash_Case_Insensitive
456
     "a-slcain",    -- Ada.Strings.Less_Case_Insensitive
457
     "a-szuzti",    -- Ada.Strings.Wide_Wide_Unbounded.Wide_Wide_Text_IO
458
     "a-zchuni",    -- Ada.Wide_Wide_Characters.Unicode
459
 
460
   ---------------------------
461
   -- GNAT Special IO Units --
462
   ---------------------------
463
 
464
   --  See Ada 95 section for further information. These packages are for the
465
   --  implementation of the Wide_Wide_Text_IO generic packages.
466
 
467
     "a-ztdeio",    -- Ada.Wide_Wide_Text_IO.Decimal_IO
468
     "a-ztenio",    -- Ada.Wide_Wide_Text_IO.Enumeration_IO
469
     "a-ztfiio",    -- Ada.Wide_Wide_Text_IO.Fixed_IO
470
     "a-ztflio",    -- Ada.Wide_Wide_Text_IO.Float_IO
471
     "a-ztinio",    -- Ada.Wide_Wide_Text_IO.Integer_IO
472
     "a-ztmoio",    -- Ada.Wide_Wide_Text_IO.Modular_IO
473
 
474
   ------------------------
475
   -- GNAT Library Units --
476
   ------------------------
477
 
478
     "g-zspche",    -- GNAT.Wide_Wide_Spelling_Checker
479
     "g-zstspl");   -- GNAT.Wide_Wide_String_Split
480
 
481
   -----------------------
482
   -- Alternative Units --
483
   -----------------------
484
 
485
   --  For some implementation units, there is a unit in the GNAT library
486
   --  that has identical functionality that is usable. If we have such a
487
   --  case we record the appropriate Unit name in Error_Msg_String.
488
 
489
   type Aunit_Record is record
490
      Fname : String (1 .. 6);
491
      Aname : String_Ptr;
492
   end record;
493
 
494
   --  Array of alternative unit names
495
 
496
   Scasuti : aliased String := "GNAT.Case_Util";
497
   Sos_lib : aliased String := "GNAT.OS_Lib";
498
   Sregexp : aliased String := "GNAT.Regexp";
499
   Sregpat : aliased String := "GNAT.Regpat";
500
   Sstring : aliased String := "GNAT.Strings";
501
   Sstusta : aliased String := "GNAT.Task_Stack_Usage";
502
   Stasloc : aliased String := "GNAT.Task_Lock";
503
   Sutf_32 : aliased String := "GNAT.UTF_32";
504
 
505
   --  Array giving mapping
506
 
507
   Map_Array : constant array (1 .. 8) of Aunit_Record := (
508
                 ("casuti", Scasuti'Access),
509
                 ("os_lib", Sos_lib'Access),
510
                 ("regexp", Sregexp'Access),
511
                 ("regpat", Sregpat'Access),
512
                 ("string", Sstring'Access),
513
                 ("stusta", Sstusta'Access),
514
                 ("tasloc", Stasloc'Access),
515
                 ("utf_32", Sutf_32'Access));
516
 
517
   ----------------------
518
   -- Get_Kind_Of_Unit --
519
   ----------------------
520
 
521
   function Get_Kind_Of_Unit (U : Unit_Number_Type) return Kind_Of_Unit is
522
      Fname : constant File_Name_Type := Unit_File_Name (U);
523
 
524
   begin
525
      Error_Msg_Strlen := 0;
526
 
527
      --  If length of file name is greater than 12, not predefined.
528
      --  The value 12 here is an 8 char name with extension .ads.
529
 
530
      if Length_Of_Name (Fname) > 12 then
531
         return Not_Predefined_Unit;
532
      end if;
533
 
534
      --  Otherwise test file name
535
 
536
      Get_Name_String (Fname);
537
 
538
      --  Not predefined if file name does not start with a- g- s- i-
539
 
540
      if Name_Len < 3
541
        or else Name_Buffer (2) /= '-'
542
        or else (Name_Buffer (1) /= 'a'
543
                   and then
544
                 Name_Buffer (1) /= 'g'
545
                   and then
546
                 Name_Buffer (1) /= 'i'
547
                   and then
548
                 Name_Buffer (1) /= 's')
549
      then
550
         return Not_Predefined_Unit;
551
      end if;
552
 
553
      --  Not predefined if file name does not end in .ads. This can
554
      --  happen when non-standard file names are being used.
555
 
556
      if Name_Buffer (Name_Len - 3 .. Name_Len) /= ".ads" then
557
         return Not_Predefined_Unit;
558
      end if;
559
 
560
      --  Otherwise normalize file name to 8 characters
561
 
562
      Name_Len := Name_Len - 4;
563
      while Name_Len < 8 loop
564
         Name_Len := Name_Len + 1;
565
         Name_Buffer (Name_Len) := ' ';
566
      end loop;
567
 
568
      --  See if name is in 95 list
569
 
570
      for J in Non_Imp_File_Names_95'Range loop
571
         if Name_Buffer (1 .. 8) = Non_Imp_File_Names_95 (J) then
572
            return Ada_95_Unit;
573
         end if;
574
      end loop;
575
 
576
      --  See if name is in 05 list
577
 
578
      for J in Non_Imp_File_Names_05'Range loop
579
         if Name_Buffer (1 .. 8) = Non_Imp_File_Names_05 (J) then
580
            return Ada_05_Unit;
581
         end if;
582
      end loop;
583
 
584
      --  Only remaining special possibilities are children of System.RPC and
585
      --  System.Garlic and special files of the form System.Aux...
586
 
587
      Get_Name_String (Unit_Name (U));
588
 
589
      if Name_Len > 12
590
        and then Name_Buffer (1 .. 11) = "system.rpc."
591
      then
592
         return Ada_95_Unit;
593
      end if;
594
 
595
      if Name_Len > 15
596
        and then Name_Buffer (1 .. 14) = "system.garlic."
597
      then
598
         return Ada_95_Unit;
599
      end if;
600
 
601
      if Name_Len > 11
602
        and then Name_Buffer (1 .. 10) = "system.aux"
603
      then
604
         return Ada_95_Unit;
605
      end if;
606
 
607
      --  All tests failed, this is definitely an implementation unit. See if
608
      --  we have an alternative name.
609
 
610
      Get_Name_String (Fname);
611
 
612
      if Name_Len = 12
613
        and then Name_Buffer (1 .. 2) = "s-"
614
        and then Name_Buffer (9 .. 12) = ".ads"
615
      then
616
         for J in Map_Array'Range loop
617
            if Name_Buffer (3 .. 8) = Map_Array (J).Fname then
618
               Error_Msg_Strlen := Map_Array (J).Aname'Length;
619
               Error_Msg_String (1 .. Error_Msg_Strlen) :=
620
                 Map_Array (J).Aname.all;
621
            end if;
622
         end loop;
623
      end if;
624
 
625
      return Implementation_Unit;
626
   end Get_Kind_Of_Unit;
627
 
628
   -------------------
629
   -- Is_Known_Unit --
630
   -------------------
631
 
632
   function Is_Known_Unit (Nam : Node_Id) return Boolean is
633
      Unam : Unit_Name_Type;
634
      Fnam : File_Name_Type;
635
 
636
   begin
637
      --  If selector is not an identifier (e.g. it is a character literal or
638
      --  some junk from a previous error), then definitely not a known unit.
639
 
640
      if Nkind (Selector_Name (Nam)) /= N_Identifier then
641
         return False;
642
      end if;
643
 
644
      --  Otherwise get corresponding file name
645
 
646
      Unam := Get_Unit_Name (Nam);
647
      Fnam := Get_File_Name (Unam, Subunit => False);
648
      Get_Name_String (Fnam);
649
 
650
      --  Remove extension from file name
651
 
652
      if Name_Buffer (Name_Len - 3 .. Name_Len) = ".adb" then
653
         Name_Len := Name_Len - 4;
654
      else
655
         return False;
656
      end if;
657
 
658
      --  Pad name to 8 characters
659
 
660
      while Name_Len < 8 loop
661
         Name_Len := Name_Len + 1;
662
         Name_Buffer (Name_Len) := ' ';
663
      end loop;
664
 
665
      --  If length more than 8, definitely not a match
666
 
667
      if Name_Len /= 8 then
668
         return False;
669
      end if;
670
 
671
      --  If length is 8, search our tables
672
 
673
      for J in Non_Imp_File_Names_95'Range loop
674
         if Name_Buffer (1 .. 8) = Non_Imp_File_Names_95 (J) then
675
            return True;
676
         end if;
677
      end loop;
678
 
679
      for J in Non_Imp_File_Names_05'Range loop
680
         if Name_Buffer (1 .. 8) = Non_Imp_File_Names_05 (J) then
681
            return True;
682
         end if;
683
      end loop;
684
 
685
      --  If not found, not known
686
 
687
      return False;
688
 
689
   --  A safety guard, if we get an exception during this processing then it
690
   --  is most likely the result of a previous error, or a peculiar case we
691
   --  have not thought of. Since this routine is only used for error message
692
   --  refinement, we will just return False.
693
 
694
   exception
695
      when others =>
696
         return False;
697
   end Is_Known_Unit;
698
 
699
end Impunit;

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