gcc/ada/impunit.adb

   1 ------------------------------------------------------------------------------
   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-signal",    -- GNAT.Signals
 267      "g-socket",    -- GNAT.Sockets
 268      "g-souinf",    -- GNAT.Source_Info
 269      "g-speche",    -- GNAT.Spell_Checker
 270      "g-spchge",    -- GNAT.Spell_Checker_Generic
 271      "g-spitbo",    -- GNAT.Spitbol
 272      "g-spipat",    -- GNAT.Spitbol.Patterns
 273      "g-sptabo",    -- GNAT.Spitbol.Table_Boolean
 274      "g-sptain",    -- GNAT.Spitbol.Table_Integer
 275      "g-sptavs",    -- GNAT.Spitbol.Table_Vstring
 276      "g-string",    -- GNAT.Strings
 277      "g-strspl",    -- GNAT.String_Split
 278      "g-sse   ",    -- GNAT.SSE
 279      "g-ssvety",    -- GNAT.SSE.Vector_Types
 280      "g-table ",    -- GNAT.Table
 281      "g-tasloc",    -- GNAT.Task_Lock
 282      "g-thread",    -- GNAT.Threads
 283      "g-timsta",    -- GNAT.Time_Stamp
 284      "g-traceb",    -- GNAT.Traceback
 285      "g-trasym",    -- GNAT.Traceback.Symbolic
 286      "g-utf_32",    -- GNAT.UTF_32
 287      "g-u3spch",    -- GNAT.UTF_32_Spelling_Checker
 288      "g-wispch",    -- GNAT.Wide_Spelling_Checker
 289      "g-wistsp",    -- GNAT.Wide_String_Split
 290
 291    -----------------------------------------------------
 292    -- Interface Hierarchy Units from Reference Manual --
 293    -----------------------------------------------------
 294
 295      "i-c     ",    -- Interfaces.C
 296      "i-cobol ",    -- Interfaces.Cobol
 297      "i-cpoint",    -- Interfaces.C.Pointers
 298      "i-cstrin",    -- Interfaces.C.Strings
 299      "i-fortra",    -- Interfaces.Fortran
 300
 301    ------------------------------------------
 302    -- GNAT Defined Additions to Interfaces --
 303    ------------------------------------------
 304
 305      "i-cexten",    -- Interfaces.C.Extensions
 306      "i-cil   ",    -- Interfaces.CIL
 307      "i-cilobj",    -- Interfaces.CIL.Object
 308      "i-cpp   ",    -- Interfaces.CPP
 309      "i-cstrea",    -- Interfaces.C.Streams
 310      "i-java  ",    -- Interfaces.Java
 311      "i-javjni",    -- Interfaces.Java.JNI
 312      "i-pacdec",    -- Interfaces.Packed_Decimal
 313      "i-vxwoio",    -- Interfaces.VxWorks.IO
 314      "i-vxwork",    -- Interfaces.VxWorks
 315
 316    --------------------------------------------------
 317    -- System Hierarchy Units from Reference Manual --
 318    --------------------------------------------------
 319
 320      "s-atacco",    -- System.Address_To_Access_Conversions
 321      "s-maccod",    -- System.Machine_Code
 322      "s-rpc   ",    -- System.Rpc
 323      "s-stoele",    -- System.Storage_Elements
 324      "s-stopoo",    -- System.Storage_Pools
 325
 326    --------------------------------------
 327    -- GNAT Defined Additions to System --
 328    --------------------------------------
 329
 330      "s-addima",    -- System.Address_Image
 331      "s-assert",    -- System.Assertions
 332      "s-memory",    -- System.Memory
 333      "s-parint",    -- System.Partition_Interface
 334      "s-pooglo",    -- System.Pool_Global
 335      "s-pooloc",    -- System.Pool_Local
 336      "s-restri",    -- System.Restrictions
 337      "s-rident",    -- System.Rident
 338      "s-ststop",    -- System.Strings.Stream_Ops
 339      "s-tasinf",    -- System.Task_Info
 340      "s-wchcnv",    -- System.Wch_Cnv
 341      "s-wchcon");   -- System.Wch_Con
 342
 343    --------------------
 344    -- Ada 2005 Units --
 345    --------------------
 346
 347    --  The following units should be used only in Ada 05 mode
 348
 349    Non_Imp_File_Names_05 : constant File_List := (
 350
 351    --------------------------------------------------------
 352    -- Ada Hierarchy Units from Ada 2005 Reference Manual --
 353    --------------------------------------------------------
 354
 355      "a-assert",    -- Ada.Assertions
 356      "a-calari",    -- Ada.Calendar.Arithmetic
 357      "a-calfor",    -- Ada.Calendar.Formatting
 358      "a-catizo",    -- Ada.Calendar.Time_Zones
 359      "a-cdlili",    -- Ada.Containers.Doubly_Linked_Lists
 360      "a-cgarso",    -- Ada.Containers.Generic_Array_Sort
 361      "a-cgcaso",    -- Ada.Containers.Generic_Constrained_Array_Sort
 362      "a-chacon",    -- Ada.Characters.Conversions
 363      "a-cidlli",    -- Ada.Containers.Indefinite_Doubly_Linked_Lists
 364      "a-cihama",    -- Ada.Containers.Indefinite_Hashed_Maps
 365      "a-cihase",    -- Ada.Containers.Indefinite_Hashed_Sets
 366      "a-ciorma",    -- Ada.Containers.Indefinite_Ordered_Maps
 367      "a-ciorse",    -- Ada.Containers.Indefinite_Ordered_Sets
 368      "a-cohama",    -- Ada.Containers.Hashed_Maps
 369      "a-cohase",    -- Ada.Containers.Hashed_Sets
 370      "a-coinve",    -- Ada.Containers.Indefinite_Vectors
 371      "a-contai",    -- Ada.Containers
 372      "a-convec",    -- Ada.Containers.Vectors
 373      "a-coorma",    -- Ada.Containers.Ordered_Maps
 374      "a-coorse",    -- Ada.Containers.Ordered_Sets
 375      "a-coteio",    -- Ada.Complex_Text_IO
 376      "a-direct",    -- Ada.Directories
 377      "a-diroro",    -- Ada.Dispatching.Round_Robin
 378      "a-disedf",    -- Ada.Dispatching.EDF
 379      "a-dispat",    -- Ada.Dispatching
 380      "a-envvar",    -- Ada.Environment_Variables
 381      "a-exetim",    -- Ada.Execution_Time
 382      "a-extiti",    -- Ada.Execution_Time.Timers
 383      "a-rttiev",    -- Ada.Real_Time.Timing_Events
 384      "a-ngcoar",    -- Ada.Numerics.Generic_Complex_Arrays
 385      "a-ngrear",    -- Ada.Numerics.Generic_Real_Arrays
 386      "a-nucoar",    -- Ada.Numerics.Complex_Arrays
 387      "a-nurear",    -- Ada.Numerics.Real_Arrays
 388      "a-stboha",    -- Ada.Strings.Bounded.Hash
 389      "a-stfiha",    -- Ada.Strings.Fixed.Hash
 390      "a-strhas",    -- Ada.Strings.Hash
 391      "a-stunha",    -- Ada.Strings.Unbounded.Hash
 392      "a-stwiha",    -- Ada.Strings.Wide_Hash
 393      "a-stzbou",    -- Ada.Strings.Wide_Wide_Bounded
 394      "a-stzfix",    -- Ada.Strings.Wide_Wide_Fixed
 395      "a-stzhas",    -- Ada.Strings.Wide_Wide_Hash
 396      "a-stzmap",    -- Ada.Strings.Wide_Wide_Maps
 397      "a-stzunb",    -- Ada.Strings.Wide_Wide_Unbounded
 398      "a-swbwha",    -- Ada.Strings.Wide_Bounded.Wide_Hash
 399      "a-swfwha",    -- Ada.Strings.Wide_Fixed.Wide_Hash
 400      "a-swuwha",    -- Ada.Strings.Wide_Unbounded.Wide_Hash
 401      "a-szbzha",    -- Ada.Strings.Wide_Wide_Bounded.Wide_Wide_Hash
 402      "a-szfzha",    -- Ada.Strings.Wide_Wide_Fixed.Wide_Wide_Hash
 403      "a-szmzco",    -- Ada.Strings.Wide_Wide_Maps.Wide_Wide_Constants
 404      "a-szuzha",    -- Ada.Strings.Wide_Wide_Unbounded.Wide_Wide_Hash
 405      "a-taster",    -- Ada.Task_Termination
 406      "a-tgdico",    -- Ada.Tags.Generic_Dispatching_Constructor
 407      "a-tiboio",    -- Ada.Text_IO.Bounded_IO
 408      "a-tiunio",    -- Ada.Text_IO.Unbounded_IO
 409      "a-wichun",    -- Ada.Wide_Characters.Unicode
 410      "a-wwboio",    -- Ada.Wide_Text_IO.Wide_Bounded_IO
 411      "a-wwunio",    -- Ada.Wide_Text_IO.Wide_Unbounded_IO
 412      "a-zchara",    -- Ada.Wide_Wide_Characters
 413      "a-ztcoio",    -- Ada.Wide_Wide_Text_IO.Complex_IO
 414      "a-ztedit",    -- Ada.Wide_Wide_Text_IO.Editing
 415      "a-zttest",    -- Ada.Wide_Wide_Text_IO.Text_Streams
 416      "a-ztexio",    -- Ada.Wide_Wide_Text_IO
 417      "a-zzboio",    -- Ada.Wide_Wide_Text_IO.Wide_Wide_Bounded_IO
 418      "a-zzunio",    -- Ada.Wide_Wide_Text_IO.Wide_Wide_Unbounded_IO
 419
 420    ------------------------------------------------------
 421    -- RM Required Additions to Ada 2005 for GNAT Types --
 422    ------------------------------------------------------
 423
 424      "a-lcteio",    -- Ada.Long_Complex_Text_IO
 425      "a-lfztio",    -- Ada.Long_Float_Wide_Wide_Text_IO
 426      "a-liztio",    -- Ada.Long_Integer_Wide_Wide_Text_IO
 427      "a-llctio",    -- Ada.Long_Long_Complex_Text_IO
 428      "a-llfzti",    -- Ada.Long_Long_Float_Wide_Wide_Text_IO
 429      "a-llizti",    -- Ada.Long_Long_Integer_Wide_Wide_Text_IO
 430      "a-nlcoar",    -- Ada.Numerics.Long_Complex_Arrays
 431      "a-nllcar",    -- Ada.Numerics.Long_Long_Complex_Arrays
 432      "a-nllrar",    -- Ada.Numerics.Long_Long_Real_Arrays
 433      "a-nlrear",    -- Ada.Numerics.Long_Real_Arrays
 434      "a-scteio",    -- Ada.Short_Complex_Text_IO
 435      "a-sfztio",    -- Ada.Short_Float_Wide_Wide_Text_IO
 436      "a-siztio",    -- Ada.Short_Integer_Wide_Wide_Text_IO
 437      "a-ssizti",    -- Ada.Short_Short_Integer_Wide_Wide_Text_IO
 438      "a-ztcstr",    -- Ada.Wide_Wide_Text_IO.C_Streams
 439
 440    ----------------------------------------
 441    -- GNAT Defined Additions to Ada 2005 --
 442    ----------------------------------------
 443
 444      "a-cgaaso",    -- Ada.Containers.Generic_Anonymous_Array_Sort
 445      "a-chzla1",    -- Ada.Characters.Wide_Wide_Latin_1
 446      "a-chzla9",    -- Ada.Characters.Wide_Wide_Latin_9
 447      "a-ciormu",    -- Ada.Containers.Indefinite_Ordered_Multisets
 448      "a-coormu",    -- Ada.Containers.Ordered_Multisets
 449      "a-crdlli",    -- Ada.Containers.Restricted_Doubly_Linked_Lists
 450      "a-secain",    -- Ada.Strings.Equal_Case_Insensitive
 451      "a-shcain",    -- Ada.Strings.Hash_Case_Insensitive
 452      "a-slcain",    -- Ada.Strings.Less_Case_Insensitive
 453      "a-szuzti",    -- Ada.Strings.Wide_Wide_Unbounded.Wide_Wide_Text_IO
 454      "a-zchuni",    -- Ada.Wide_Wide_Characters.Unicode
 455
 456    ---------------------------
 457    -- GNAT Special IO Units --
 458    ---------------------------
 459
 460    --  See Ada 95 section for further information. These packages are for the
 461    --  implementation of the Wide_Wide_Text_IO generic packages.
 462
 463      "a-ztdeio",    -- Ada.Wide_Wide_Text_IO.Decimal_IO
 464      "a-ztenio",    -- Ada.Wide_Wide_Text_IO.Enumeration_IO
 465      "a-ztfiio",    -- Ada.Wide_Wide_Text_IO.Fixed_IO
 466      "a-ztflio",    -- Ada.Wide_Wide_Text_IO.Float_IO
 467      "a-ztinio",    -- Ada.Wide_Wide_Text_IO.Integer_IO
 468      "a-ztmoio",    -- Ada.Wide_Wide_Text_IO.Modular_IO
 469
 470    ------------------------
 471    -- GNAT Library Units --
 472    ------------------------
 473
 474      "g-zspche",    -- GNAT.Wide_Wide_Spelling_Checker
 475      "g-zstspl");   -- GNAT.Wide_Wide_String_Split
 476
 477    -----------------------
 478    -- Alternative Units --
 479    -----------------------
 480
 481    --  For some implementation units, there is a unit in the GNAT library
 482    --  that has identical functionality that is usable. If we have such a
 483    --  case we record the appropriate Unit name in Error_Msg_String.
 484
 485    type Aunit_Record is record
 486       Fname : String (1 .. 6);
 487       Aname : String_Ptr;
 488    end record;
 489
 490    --  Array of alternative unit names
 491
 492    Scasuti : aliased String := "GNAT.Case_Util";
 493    Sos_lib : aliased String := "GNAT.OS_Lib";
 494    Sregexp : aliased String := "GNAT.Regexp";
 495    Sregpat : aliased String := "GNAT.Regpat";
 496    Sstring : aliased String := "GNAT.Strings";
 497    Sstusta : aliased String := "GNAT.Task_Stack_Usage";
 498    Stasloc : aliased String := "GNAT.Task_Lock";
 499    Sutf_32 : aliased String := "GNAT.UTF_32";
 500
 501    --  Array giving mapping
 502
 503    Map_Array : constant array (1 .. 8) of Aunit_Record := (
 504                  ("casuti", Scasuti'Access),
 505                  ("os_lib", Sos_lib'Access),
 506                  ("regexp", Sregexp'Access),
 507                  ("regpat", Sregpat'Access),
 508                  ("string", Sstring'Access),
 509                  ("stusta", Sstusta'Access),
 510                  ("tasloc", Stasloc'Access),
 511                  ("utf_32", Sutf_32'Access));
 512
 513    ----------------------
 514    -- Get_Kind_Of_Unit --
 515    ----------------------
 516
 517    function Get_Kind_Of_Unit (U : Unit_Number_Type) return Kind_Of_Unit is
 518       Fname : constant File_Name_Type := Unit_File_Name (U);
 519
 520    begin
 521       Error_Msg_Strlen := 0;
 522
 523       --  If length of file name is greater than 12, not predefined.
 524       --  The value 12 here is an 8 char name with extension .ads.
 525
 526       if Length_Of_Name (Fname) > 12 then
 527          return Not_Predefined_Unit;
 528       end if;
 529
 530       --  Otherwise test file name
 531
 532       Get_Name_String (Fname);
 533
 534       --  Not predefined if file name does not start with a- g- s- i-
 535
 536       if Name_Len < 3
 537         or else Name_Buffer (2) /= '-'
 538         or else (Name_Buffer (1) /= 'a'
 539                    and then
 540                  Name_Buffer (1) /= 'g'
 541                    and then
 542                  Name_Buffer (1) /= 'i'
 543                    and then
 544                  Name_Buffer (1) /= 's')
 545       then
 546          return Not_Predefined_Unit;
 547       end if;
 548
 549       --  Not predefined if file name does not end in .ads. This can
 550       --  happen when non-standard file names are being used.
 551
 552       if Name_Buffer (Name_Len - 3 .. Name_Len) /= ".ads" then
 553          return Not_Predefined_Unit;
 554       end if;
 555
 556       --  Otherwise normalize file name to 8 characters
 557
 558       Name_Len := Name_Len - 4;
 559       while Name_Len < 8 loop
 560          Name_Len := Name_Len + 1;
 561          Name_Buffer (Name_Len) := ' ';
 562       end loop;
 563
 564       --  See if name is in 95 list
 565
 566       for J in Non_Imp_File_Names_95'Range loop
 567          if Name_Buffer (1 .. 8) = Non_Imp_File_Names_95 (J) then
 568             return Ada_95_Unit;
 569          end if;
 570       end loop;
 571
 572       --  See if name is in 05 list
 573
 574       for J in Non_Imp_File_Names_05'Range loop
 575          if Name_Buffer (1 .. 8) = Non_Imp_File_Names_05 (J) then
 576             return Ada_05_Unit;
 577          end if;
 578       end loop;
 579
 580       --  Only remaining special possibilities are children of System.RPC and
 581       --  System.Garlic and special files of the form System.Aux...
 582
 583       Get_Name_String (Unit_Name (U));
 584
 585       if Name_Len > 12
 586         and then Name_Buffer (1 .. 11) = "system.rpc."
 587       then
 588          return Ada_95_Unit;
 589       end if;
 590
 591       if Name_Len > 15
 592         and then Name_Buffer (1 .. 14) = "system.garlic."
 593       then
 594          return Ada_95_Unit;
 595       end if;
 596
 597       if Name_Len > 11
 598         and then Name_Buffer (1 .. 10) = "system.aux"
 599       then
 600          return Ada_95_Unit;
 601       end if;
 602
 603       --  All tests failed, this is definitely an implementation unit. See if
 604       --  we have an alternative name.
 605
 606       Get_Name_String (Fname);
 607
 608       if Name_Len = 12
 609         and then Name_Buffer (1 .. 2) = "s-"
 610         and then Name_Buffer (9 .. 12) = ".ads"
 611       then
 612          for J in Map_Array'Range loop
 613             if Name_Buffer (3 .. 8) = Map_Array (J).Fname then
 614                Error_Msg_Strlen := Map_Array (J).Aname'Length;
 615                Error_Msg_String (1 .. Error_Msg_Strlen) :=
 616                  Map_Array (J).Aname.all;
 617             end if;
 618          end loop;
 619       end if;
 620
 621       return Implementation_Unit;
 622    end Get_Kind_Of_Unit;
 623
 624    -------------------
 625    -- Is_Known_Unit --
 626    -------------------
 627
 628    function Is_Known_Unit (Nam : Node_Id) return Boolean is
 629       Unam : Unit_Name_Type;
 630       Fnam : File_Name_Type;
 631
 632    begin
 633       --  If selector is not an identifier (e.g. it is a character literal or
 634       --  some junk from a previous error), then definitely not a known unit.
 635
 636       if Nkind (Selector_Name (Nam)) /= N_Identifier then
 637          return False;
 638       end if;
 639
 640       --  Otherwise get corresponding file name
 641
 642       Unam := Get_Unit_Name (Nam);
 643       Fnam := Get_File_Name (Unam, Subunit => False);
 644       Get_Name_String (Fnam);
 645
 646       --  Remove extension from file name
 647
 648       if Name_Buffer (Name_Len - 3 .. Name_Len) = ".adb" then
 649          Name_Len := Name_Len - 4;
 650       else
 651          return False;
 652       end if;
 653
 654       --  Pad name to 8 characters
 655
 656       while Name_Len < 8 loop
 657          Name_Len := Name_Len + 1;
 658          Name_Buffer (Name_Len) := ' ';
 659       end loop;
 660
 661       --  If length more than 8, definitely not a match
 662
 663       if Name_Len /= 8 then
 664          return False;
 665       end if;
 666
 667       --  If length is 8, search our tables
 668
 669       for J in Non_Imp_File_Names_95'Range loop
 670          if Name_Buffer (1 .. 8) = Non_Imp_File_Names_95 (J) then
 671             return True;
 672          end if;
 673       end loop;
 674
 675       for J in Non_Imp_File_Names_05'Range loop
 676          if Name_Buffer (1 .. 8) = Non_Imp_File_Names_05 (J) then
 677             return True;
 678          end if;
 679       end loop;
 680
 681       --  If not found, not known
 682
 683       return False;
 684
 685    --  A safety guard, if we get an exception during this processing then it
 686    --  is most likely the result of a previous error, or a peculiar case we
 687    --  have not thought of. Since this routine is only used for error message
 688    --  refinement, we will just return False.
 689
 690    exception
 691       when others =>
 692          return False;
 693    end Is_Known_Unit;
 694
 695 end Impunit;