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) 2000-2007, 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 Sinfo;    use Sinfo;
  28 with Fname.UF; use Fname.UF;
  29 with Lib;      use Lib;
  30 with Namet;    use Namet;
  31 with Uname;    use Uname;
  32
  33 package body Impunit is
  34
  35    subtype File_Name_8 is String (1 .. 8);
  36    type File_List is array (Nat range <>) of File_Name_8;
  37
  38    ------------------
  39    -- Ada 95 Units --
  40    ------------------
  41
  42    --  The following is a giant string list containing the names of all
  43    --  non-implementation internal files, i.e. the complete list of files for
  44    --  internal units which a program may legitimately WITH when operating in
  45    --  either Ada 95 or Ada 05 mode.
  46
  47    --  Note that this list should match the list of units documented in the
  48    --  "GNAT Library" section of the GNAT Reference Manual.
  49
  50    Non_Imp_File_Names_95 : constant File_List := (
  51
  52    ------------------------------------------------------
  53    -- Ada Hierarchy Units from Ada-83 Reference Manual --
  54    ------------------------------------------------------
  55
  56      "a-astaco",    -- Ada.Asynchronous_Task_Control
  57      "a-calend",    -- Ada.Calendar
  58      "a-chahan",    -- Ada.Characters.Handling
  59      "a-charac",    -- Ada.Characters
  60      "a-chlat1",    -- Ada.Characters.Latin_1
  61      "a-comlin",    -- Ada.Command_Line
  62      "a-decima",    -- Ada.Decimal
  63      "a-direio",    -- Ada.Direct_IO
  64      "a-dynpri",    -- Ada.Dynamic_Priorities
  65      "a-except",    -- Ada.Exceptions
  66      "a-finali",    -- Ada.Finalization
  67      "a-flteio",    -- Ada.Float_Text_IO
  68      "a-fwteio",    -- Ada.Float_Wide_Text_IO
  69      "a-inteio",    -- Ada.Integer_Text_IO
  70      "a-interr",    -- Ada.Interrupts
  71      "a-intnam",    -- Ada.Interrupts.Names
  72      "a-ioexce",    -- Ada.IO_Exceptions
  73      "a-iwteio",    -- Ada.Integer_Wide_Text_IO
  74      "a-ncelfu",    -- Ada.Numerics.Complex_Elementary_Functions
  75      "a-ngcefu",    -- Ada.Numerics.Generic_Complex_Elementary_Functions
  76      "a-ngcoty",    -- Ada.Numerics.Generic_Complex_Types
  77      "a-ngelfu",    -- Ada.Numerics.Generic_Elementary_Functions
  78      "a-nucoty",    -- Ada.Numerics.Complex_Types
  79      "a-nudira",    -- Ada.Numerics.Discrete_Random
  80      "a-nuelfu",    -- Ada.Numerics.Elementary_Functions
  81      "a-nuflra",    -- Ada.Numerics.Float_Random
  82      "a-numeri",    -- Ada.Numerics
  83      "a-reatim",    -- Ada.Real_Time
  84      "a-sequio",    -- Ada.Sequential_IO
  85      "a-stmaco",    -- Ada.Strings.Maps.Constants
  86      "a-storio",    -- Ada.Storage_IO
  87      "a-strbou",    -- Ada.Strings.Bounded
  88      "a-stream",    -- Ada.Streams
  89      "a-strfix",    -- Ada.Strings.Fixed
  90      "a-string",    -- Ada.Strings
  91      "a-strmap",    -- Ada.Strings.Maps
  92      "a-strunb",    -- Ada.Strings.Unbounded
  93      "a-ststio",    -- Ada.Streams.Stream_IO
  94      "a-stwibo",    -- Ada.Strings.Wide_Bounded
  95      "a-stwifi",    -- Ada.Strings.Wide_Fixed
  96      "a-stwima",    -- Ada.Strings.Wide_Maps
  97      "a-stwiun",    -- Ada.Strings.Wide_Unbounded
  98      "a-swmwco",    -- Ada.Strings.Wide_Maps.Wide_Constants
  99      "a-sytaco",    -- Ada.Synchronous_Task_Control
 100      "a-tags  ",    -- Ada.Tags
 101      "a-tasatt",    -- Ada.Task_Attributes
 102      "a-taside",    -- Ada.Task_Identification
 103      "a-teioed",    -- Ada.Text_IO.Editing
 104      "a-textio",    -- Ada.Text_IO
 105      "a-ticoio",    -- Ada.Text_IO.Complex_IO
 106      "a-titest",    -- Ada.Text_IO.Text_Streams
 107      "a-unccon",    -- Ada.Unchecked_Conversion
 108      "a-uncdea",    -- Ada.Unchecked_Deallocation
 109      "a-witeio",    -- Ada.Wide_Text_IO
 110      "a-wtcoio",    -- Ada.Wide_Text_IO.Complex_IO
 111      "a-wtedit",    -- Ada.Wide_Text_IO.Editing
 112      "a-wttest",    -- Ada.Wide_Text_IO.Text_Streams
 113
 114    -------------------------------------------------
 115    -- RM Required Additions to Ada for GNAT Types --
 116    -------------------------------------------------
 117
 118      "a-lfteio",    -- Ada.Long_Float_Text_IO
 119      "a-lfwtio",    -- Ada.Long_Float_Wide_Text_IO
 120      "a-liteio",    -- Ada.Long_Integer_Text_IO
 121      "a-liwtio",    -- Ada.Long_Integer_Wide_Text_IO
 122      "a-llftio",    -- Ada.Long_Long_Float_Text_IO
 123      "a-llfwti",    -- Ada.Long_Long_Float_Wide_Text_IO
 124      "a-llitio",    -- Ada.Long_Long_Integer_Text_IO
 125      "a-lliwti",    -- Ada.Long_Long_Integer_Wide_Text_IO
 126      "a-nlcefu",    -- Ada.Long_Complex_Elementary_Functions
 127      "a-nlcoty",    -- Ada.Numerics.Long_Complex_Types
 128      "a-nlelfu",    -- Ada.Numerics.Long_Elementary_Functions
 129      "a-nllcef",    -- Ada.Long_Long_Complex_Elementary_Functions
 130      "a-nllefu",    -- Ada.Numerics.Long_Long_Elementary_Functions
 131      "a-nllcty",    -- Ada.Numerics.Long_Long_Complex_Types
 132      "a-nscefu",    -- Ada.Short_Complex_Elementary_Functions
 133      "a-nscoty",    -- Ada.Numerics.Short_Complex_Types
 134      "a-nselfu",    -- Ada.Numerics.Short_Elementary_Functions
 135      "a-sfteio",    -- Ada.Short_Float_Text_IO
 136      "a-sfwtio",    -- Ada.Short_Float_Wide_Text_IO
 137      "a-siteio",    -- Ada.Short_Integer_Text_IO
 138      "a-siwtio",    -- Ada.Short_Integer_Wide_Text_IO
 139      "a-ssitio",    -- Ada.Short_Short_Integer_Text_IO
 140      "a-ssiwti",    -- Ada.Short_Short_Integer_Wide_Text_IO
 141
 142    -----------------------------------
 143    -- GNAT Defined Additions to Ada --
 144    -----------------------------------
 145
 146      "a-chlat9",    -- Ada.Characters.Latin_9
 147      "a-clrefi",    -- Ada.Command_Line.Response_File
 148      "a-colien",    -- Ada.Command_Line.Environment
 149      "a-colire",    -- Ada.Command_Line.Remove
 150      "a-cwila1",    -- Ada.Characters.Wide_Latin_1
 151      "a-cwila9",    -- Ada.Characters.Wide_Latin_9
 152      "a-diocst",    -- Ada.Direct_IO.C_Streams
 153      "a-einuoc",    -- Ada.Exceptions.Is_Null_Occurrence
 154      "a-elchha",    -- Ada.Exceptions.Last_Chance_Handler
 155      "a-exctra",    -- Ada.Exceptions.Traceback
 156      "a-siocst",    -- Ada.Sequential_IO.C_Streams
 157      "a-ssicst",    -- Ada.Streams.Stream_IO.C_Streams
 158      "a-suteio",    -- Ada.Strings.Unbounded.Text_IO
 159      "a-swuwti",    -- Ada.Strings.Wide_Unbounded.Wide_Text_IO
 160      "a-taidim",    -- Ada.Task_Identification.Image
 161      "a-tiocst",    -- Ada.Text_IO.C_Streams
 162      "a-wtcstr",    -- Ada.Wide_Text_IO.C_Streams
 163
 164       --  Note: strictly the next two should be Ada 2005 units, but it seems
 165       --  harmless (and useful) to make then available in Ada 95 mode, since
 166       --  they only deal with Wide_Character, not Wide_Wide_Character.
 167
 168      "a-wichun",    -- Ada.Wide_Characters.Unicode
 169      "a-widcha",    -- Ada.Wide_Characters
 170
 171    ---------------------------
 172    -- GNAT Special IO Units --
 173    ---------------------------
 174
 175    --  As further explained elsewhere (see Sem_Ch10), the internal
 176    --  packages of Text_IO and Wide_Text_IO are actually implemented
 177    --  as separate children, but this fact is intended to be hidden
 178    --  from the user completely. Any attempt to WITH one of these
 179    --  units will be diagnosed as an error later on, but for now we
 180    --  do not consider these internal implementation units (if we did,
 181    --  then we would get a junk warning which would be confusing and
 182    --  unecessary, given that we generate a clear error message).
 183
 184      "a-tideio",    -- Ada.Text_IO.Decimal_IO
 185      "a-tienio",    -- Ada.Text_IO.Enumeration_IO
 186      "a-tifiio",    -- Ada.Text_IO.Fixed_IO
 187      "a-tiflio",    -- Ada.Text_IO.Float_IO
 188      "a-tiinio",    -- Ada.Text_IO.Integer_IO
 189      "a-tiinio",    -- Ada.Text_IO.Integer_IO
 190      "a-timoio",    -- Ada.Text_IO.Modular_IO
 191      "a-wtdeio",    -- Ada.Wide_Text_IO.Decimal_IO
 192      "a-wtenio",    -- Ada.Wide_Text_IO.Enumeration_IO
 193      "a-wtfiio",    -- Ada.Wide_Text_IO.Fixed_IO
 194      "a-wtflio",    -- Ada.Wide_Text_IO.Float_IO
 195      "a-wtinio",    -- Ada.Wide_Text_IO.Integer_IO
 196      "a-wtmoio",    -- Ada.Wide_Text_IO.Modular_IO
 197
 198    ------------------------
 199    -- GNAT Library Units --
 200    ------------------------
 201
 202      "g-altive",    -- GNAT.Altivec
 203      "g-alvety",    -- GNAT.Altivec.Vector_Types
 204      "g-alvevi",    -- GNAT.Altivec.Vector_Views
 205      "g-alveop",    -- GNAT.Altivec.Vector_Operations
 206      "g-altcon",    -- GNAT.Altivec.Conversions
 207      "g-arrspl",    -- GNAT.Array_Split
 208      "g-awk   ",    -- GNAT.AWK
 209      "g-boubuf",    -- GNAT.Bounded_Buffers
 210      "g-boumai",    -- GNAT.Bounded_Mailboxes
 211      "g-bubsor",    -- GNAT.Bubble_Sort
 212      "g-busora",    -- GNAT.Bubble_Sort_A
 213      "g-busorg",    -- GNAT.Bubble_Sort_G
 214      "g-bytswa",    -- Gnat.Byte_Swapping
 215      "g-calend",    -- GNAT.Calendar
 216      "g-casuti",    -- GNAT.Case_Util
 217      "g-catiio",    -- GNAT.Calendar.Time_IO
 218      "g-cgi   ",    -- GNAT.CGI
 219      "g-cgicoo",    -- GNAT.CGI.Cookie
 220      "g-cgideb",    -- GNAT.CGI.Debug
 221      "g-comlin",    -- GNAT.Command_Line
 222      "g-comver",    -- GNAT.Compiler_Version
 223      "g-crc32 ",    -- GNAT.CRC32
 224      "g-ctrl_c",    -- GNAT.Ctrl_C
 225      "g-curexc",    -- GNAT.Current_Exception
 226      "g-debpoo",    -- GNAT.Debug_Pools
 227      "g-debuti",    -- GNAT.Debug_Utilities
 228      "g-diopit",    -- GNAT.Directory_Operations.Iteration
 229      "g-dirope",    -- GNAT.Directory_Operations
 230      "g-dynhta",    -- GNAT.Dynamic_HTables
 231      "g-dyntab",    -- GNAT.Dynamic_Tables
 232      "g-excact",    -- GNAT.Exception_Actions
 233      "g-except",    -- GNAT.Exceptions
 234      "g-exctra",    -- GNAT.Exception_Traces
 235      "g-expect",    -- GNAT.Expect
 236      "g-flocon",    -- GNAT.Float_Control
 237      "g-heasor",    -- GNAT.Heap_Sort
 238      "g-hesora",    -- GNAT.Heap_Sort_A
 239      "g-hesorg",    -- GNAT.Heap_Sort_G
 240      "g-htable",    -- GNAT.Htable
 241      "g-io    ",    -- GNAT.IO
 242      "g-io_aux",    -- GNAT.IO_Aux
 243      "g-locfil",    -- GNAT.Lock_Files
 244      "g-md5   ",    -- GNAT.MD5
 245      "g-memdum",    -- GNAT.Memory_Dump
 246      "g-moreex",    -- GNAT.Most_Recent_Exception
 247      "g-os_lib",    -- GNAT.Os_Lib
 248      "g-pehage",    -- GNAT.Perfect_Hash_Generators
 249      "g-rannum",    -- GNAT.Random_Numbers
 250      "g-regexp",    -- GNAT.Regexp
 251      "g-regist",    -- GNAT.Registry
 252      "g-regpat",    -- GNAT.Regpat
 253      "g-semaph",    -- GNAT.Semaphores
 254      "g-sestin",    -- GNAT.Secondary_Stack_Info
 255      "g-sha1  ",    -- GNAT.SHA1
 256      "g-signal",    -- GNAT.Signals
 257      "g-socket",    -- GNAT.Sockets
 258      "g-souinf",    -- GNAT.Source_Info
 259      "g-speche",    -- GNAT.Spell_Checker
 260      "g-spipat",    -- GNAT.Spitbol.Patterns
 261      "g-spitbo",    -- GNAT.Spitbol
 262      "g-sptabo",    -- GNAT.Spitbol.Table_Boolean
 263      "g-sptain",    -- GNAT.Spitbol.Table_Integer
 264      "g-sptavs",    -- GNAT.Spitbol.Table_Vstring
 265      "g-string",    -- GNAT.Strings
 266      "g-strspl",    -- GNAT.String_Split
 267      "g-table ",    -- GNAT.Table
 268      "g-tasloc",    -- GNAT.Task_Lock
 269      "g-thread",    -- GNAT.Threads
 270      "g-traceb",    -- GNAT.Traceback
 271      "g-trasym",    -- GNAT.Traceback.Symbolic
 272      "g-utf_32",    -- GNAT.UTF_32
 273      "g-wistsp",    -- GNAT.Wide_String_Split
 274
 275    -----------------------------------------------------
 276    -- Interface Hierarchy Units from Reference Manual --
 277    -----------------------------------------------------
 278
 279      "i-c     ",    -- Interfaces.C
 280      "i-cobol ",    -- Interfaces.Cobol
 281      "i-cpoint",    -- Interfaces.C.Pointers
 282      "i-cstrin",    -- Interfaces.C.Strings
 283      "i-fortra",    -- Interfaces.Fortran
 284
 285    ------------------------------------------
 286    -- GNAT Defined Additions to Interfaces --
 287    ------------------------------------------
 288
 289      "i-cexten",    -- Interfaces.C.Extensions
 290      "i-cpp   ",    -- Interfaces.CPP
 291      "i-cstrea",    -- Interfaces.C.Streams
 292      "i-java  ",    -- Interfaces.Java
 293      "i-pacdec",    -- Interfaces.Packed_Decimal
 294      "i-vxwoio",    -- Interfaces.VxWorks.IO
 295      "i-vxwork",    -- Interfaces.VxWorks
 296
 297    --------------------------------------------------
 298    -- System Hierarchy Units from Reference Manual --
 299    --------------------------------------------------
 300
 301      "s-atacco",    -- System.Address_To_Access_Conversions
 302      "s-maccod",    -- System.Machine_Code
 303      "s-rpc   ",    -- System.Rpc
 304      "s-stoele",    -- System.Storage_Elements
 305      "s-stopoo",    -- System.Storage_Pools
 306
 307    --------------------------------------
 308    -- GNAT Defined Additions to System --
 309    --------------------------------------
 310
 311      "s-addima",    -- System.Address_Image
 312      "s-assert",    -- System.Assertions
 313      "s-memory",    -- System.Memory
 314      "s-os_lib",    -- System.Os_Lib
 315      "s-parint",    -- System.Partition_Interface
 316      "s-pooglo",    -- System.Pool_Global
 317      "s-pooloc",    -- System.Pool_Local
 318      "s-restri",    -- System.Restrictions
 319      "s-rident",    -- System.Rident
 320      "s-tasinf",    -- System.Task_Info
 321      "s-wchcnv",    -- System.Wch_Cnv
 322      "s-wchcon");   -- System.Wch_Con
 323
 324    --------------------
 325    -- Ada 2005 Units --
 326    --------------------
 327
 328    --  The following units should be used only in Ada 05 mode
 329
 330    Non_Imp_File_Names_05 : constant File_List := (
 331
 332    --------------------------------------------------------
 333    -- Ada Hierarchy Units from Ada 2005 Reference Manual --
 334    --------------------------------------------------------
 335
 336      "a-assert",    -- Ada.Assertions
 337      "a-calari",    -- Ada.Calendar.Arithmetic
 338      "a-calfor",    -- Ada.Calendar.Formatting
 339      "a-catizo",    -- Ada.Calendar.Time_Zones
 340      "a-cdlili",    -- Ada.Containers.Doubly_Linked_Lists
 341      "a-cgarso",    -- Ada.Containers.Generic_Array_Sort
 342      "a-cgcaso",    -- Ada.Containers.Generic_Constrained_Array_Sort
 343      "a-chacon",    -- Ada.Characters.Conversions
 344      "a-cidlli",    -- Ada.Containers.Indefinite_Doubly_Linked_Lists
 345      "a-cihama",    -- Ada.Containers.Indefinite_Hashed_Maps
 346      "a-cihase",    -- Ada.Containers.Indefinite_Hashed_Sets
 347      "a-ciorma",    -- Ada.Containers.Indefinite_Ordered_Maps
 348      "a-ciorse",    -- Ada.Containers.Indefinite_Ordered_Sets
 349      "a-cohama",    -- Ada.Containers.Hashed_Maps
 350      "a-cohase",    -- Ada.Containers.Hashed_Sets
 351      "a-coinve",    -- Ada.Containers.Indefinite_Vectors
 352      "a-contai",    -- Ada.Containers
 353      "a-convec",    -- Ada.Containers.Vectors
 354      "a-coorma",    -- Ada.Containers.Ordered_Maps
 355      "a-coorse",    -- Ada.Containers.Ordered_Sets
 356      "a-coteio",    -- Ada.Complex_Text_IO
 357      "a-direct",    -- Ada.Directories
 358      "a-diroro",    -- Ada.Dispatching.Round_Robin
 359      "a-dispat",    -- Ada.Dispatching
 360      "a-envvar",    -- Ada.Environment_Variables
 361      "a-exetim",    -- Ada.Execution_Time
 362      "a-extiti",    -- Ada.Execution_Time.Timers
 363      "a-rttiev",    -- Ada.Real_Time.Timing_Events
 364      "a-ngcoar",    -- Ada.Numerics.Generic_Complex_Arrays
 365      "a-ngrear",    -- Ada.Numerics.Generic_Real_Arrays
 366      "a-nucoar",    -- Ada.Numerics.Complex_Arrays
 367      "a-nurear",    -- Ada.Numerics.Real_Arrays
 368      "a-stboha",    -- Ada.Strings.Bounded.Hash
 369      "a-stfiha",    -- Ada.Strings.Fixed.Hash
 370      "a-strhas",    -- Ada.Strings.Hash
 371      "a-stunha",    -- Ada.Strings.Unbounded.Hash
 372      "a-stwiha",    -- Ada.Strings.Wide_Hash
 373      "a-stzbou",    -- Ada.Strings.Wide_Wide_Bounded
 374      "a-stzfix",    -- Ada.Strings.Wide_Wide_Fixed
 375      "a-stzhas",    -- Ada.Strings.Wide_Wide_Hash
 376      "a-stzmap",    -- Ada.Strings.Wide_Wide_Maps
 377      "a-stzunb",    -- Ada.Strings.Wide_Wide_Unbounded
 378      "a-swbwha",    -- Ada.Strings.Wide_Bounded.Wide_Hash
 379      "a-swfwha",    -- Ada.Strings.Wide_Fixed.Wide_Hash
 380      "a-swuwha",    -- Ada.Strings.Wide_Unbounded.Wide_Hash
 381      "a-szbzha",    -- Ada.Strings.Wide_Wide_Bounded.Wide_Wide_Hash
 382      "a-szfzha",    -- Ada.Strings.Wide_Wide_Fixed.Wide_Wide_Hash
 383      "a-szmzco",    -- Ada.Strings.Wide_Wide_Maps.Wide_Wide_Constants
 384      "a-szuzha",    -- Ada.Strings.Wide_Wide_Unbounded.Wide_Wide_Hash
 385      "a-taster",    -- Ada.Task_Termination
 386      "a-tgdico",    -- Ada.Tags.Generic_Dispatching_Constructor
 387      "a-tiboio",    -- Ada.Text_IO.Bounded_IO
 388      "a-tiunio",    -- Ada.Text_IO.Unbounded_IO
 389      "a-wichun",    -- Ada.Wide_Characters.Unicode
 390      "a-wwboio",    -- Ada.Wide_Text_IO.Wide_Bounded_IO
 391      "a-wwunio",    -- Ada.Wide_Text_IO.Wide_Unbounded_IO
 392      "a-zchara",    -- Ada.Wide_Wide_Characters
 393      "a-ztcoio",    -- Ada.Wide_Wide_Text_IO.Complex_IO
 394      "a-ztedit",    -- Ada.Wide_Wide_Text_IO.Editing
 395      "a-zttest",    -- Ada.Wide_Wide_Text_IO.Text_Streams
 396      "a-ztexio",    -- Ada.Wide_Wide_Text_IO
 397      "a-zzboio",    -- Ada.Wide_Wide_Text_IO.Wide_Wide_Bounded_IO
 398      "a-zzunio",    -- Ada.Wide_Wide_Text_IO.Wide_Wide_Unbounded_IO
 399
 400    ------------------------------------------------------
 401    -- RM Required Additions to Ada 2005 for GNAT Types --
 402    ------------------------------------------------------
 403
 404      "a-lcteio",    -- Ada.Long_Complex_Text_IO
 405      "a-lfztio",    -- Ada.Long_Float_Wide_Wide_Text_IO
 406      "a-liztio",    -- Ada.Long_Integer_Wide_Wide_Text_IO
 407      "a-llctio",    -- Ada.Long_Long_Complex_Text_IO
 408      "a-llfzti",    -- Ada.Long_Long_Float_Wide_Wide_Text_IO
 409      "a-llizti",    -- Ada.Long_Long_Integer_Wide_Wide_Text_IO
 410      "a-nlcoar",    -- Ada.Numerics.Long_Complex_Arrays
 411      "a-nllcar",    -- Ada.Numerics.Long_Long_Complex_Arrays
 412      "a-nllrar",    -- Ada.Numerics.Long_Long_Real_Arrays
 413      "a-nlrear",    -- Ada.Numerics.Long_Real_Arrays
 414      "a-scteio",    -- Ada.Short_Complex_Text_IO
 415      "a-sfztio",    -- Ada.Short_Float_Wide_Wide_Text_IO
 416      "a-siztio",    -- Ada.Short_Integer_Wide_Wide_Text_IO
 417      "a-ssizti",    -- Ada.Short_Short_Integer_Wide_Wide_Text_IO
 418      "a-ztcstr",    -- Ada.Wide_Wide_Text_IO.C_Streams
 419
 420    ----------------------------------------
 421    -- GNAT Defined Additions to Ada 2005 --
 422    ----------------------------------------
 423
 424      "a-cgaaso",    -- Ada.Containers.Generic_Anonymous_Array_Sort
 425      "a-chzla1",    -- Ada.Characters.Wide_Wide_Latin_1
 426      "a-chzla9",    -- Ada.Characters.Wide_Wide_Latin_9
 427      "a-ciormu",    -- Ada.Containers.Indefinite_Ordered_Multisets
 428      "a-coormu",    -- Ada.Containers.Ordered_Multisets
 429      "a-crdlli",    -- Ada.Containers.Restricted_Doubly_Linked_Lists
 430      "a-secain",    -- Ada.Strings.Equal_Case_Insensitive
 431      "a-shcain",    -- Ada.Strings.Hash_Case_Insensitive
 432      "a-slcain",    -- Ada.Strings.Less_Case_Insensitive
 433      "a-szuzti",    -- Ada.Strings.Wide_Wide_Unbounded.Wide_Wide_Text_IO
 434      "a-zchuni",    -- Ada.Wide_Wide_Characters.Unicode
 435
 436    ---------------------------
 437    -- GNAT Special IO Units --
 438    ---------------------------
 439
 440    --  See Ada 95 section for further information. These packages are for the
 441    --  implementation of the Wide_Wide_Text_IO generic packages.
 442
 443      "a-ztdeio",    -- Ada.Wide_Wide_Text_IO.Decimal_IO
 444      "a-ztenio",    -- Ada.Wide_Wide_Text_IO.Enumeration_IO
 445      "a-ztfiio",    -- Ada.Wide_Wide_Text_IO.Fixed_IO
 446      "a-ztflio",    -- Ada.Wide_Wide_Text_IO.Float_IO
 447      "a-ztinio",    -- Ada.Wide_Wide_Text_IO.Integer_IO
 448      "a-ztmoio",    -- Ada.Wide_Wide_Text_IO.Modular_IO
 449
 450    ------------------------
 451    -- GNAT Library Units --
 452    ------------------------
 453
 454      "g-zstspl");   -- GNAT.Wide_Wide_String_Split
 455
 456    ----------------------
 457    -- Get_Kind_Of_Unit --
 458    ----------------------
 459
 460    function Get_Kind_Of_Unit (U : Unit_Number_Type) return Kind_Of_Unit is
 461       Fname : constant File_Name_Type := Unit_File_Name (U);
 462
 463    begin
 464       --  If length of file name is greater than 12, not predefined.
 465       --  The value 12 here is an 8 char name with extension .ads.
 466
 467       if Length_Of_Name (Fname) > 12 then
 468          return Not_Predefined_Unit;
 469       end if;
 470
 471       --  Otherwise test file name
 472
 473       Get_Name_String (Fname);
 474
 475       --  Not predefined if file name does not start with a- g- s- i-
 476
 477       if Name_Len < 3
 478         or else Name_Buffer (2) /= '-'
 479         or else (Name_Buffer (1) /= 'a'
 480                    and then
 481                  Name_Buffer (1) /= 'g'
 482                    and then
 483                  Name_Buffer (1) /= 'i'
 484                    and then
 485                  Name_Buffer (1) /= 's')
 486       then
 487          return Not_Predefined_Unit;
 488       end if;
 489
 490       --  Not predefined if file name does not end in .ads. This can
 491       --  happen when non-standard file names are being used.
 492
 493       if Name_Buffer (Name_Len - 3 .. Name_Len) /= ".ads" then
 494          return Not_Predefined_Unit;
 495       end if;
 496
 497       --  Otherwise normalize file name to 8 characters
 498
 499       Name_Len := Name_Len - 4;
 500       while Name_Len < 8 loop
 501          Name_Len := Name_Len + 1;
 502          Name_Buffer (Name_Len) := ' ';
 503       end loop;
 504
 505       --  See if name is in 95 list
 506
 507       for J in Non_Imp_File_Names_95'Range loop
 508          if Name_Buffer (1 .. 8) = Non_Imp_File_Names_95 (J) then
 509             return Ada_95_Unit;
 510          end if;
 511       end loop;
 512
 513       --  See if name is in 05 list
 514
 515       for J in Non_Imp_File_Names_05'Range loop
 516          if Name_Buffer (1 .. 8) = Non_Imp_File_Names_05 (J) then
 517             return Ada_05_Unit;
 518          end if;
 519       end loop;
 520
 521       --  Only remaining special possibilities are children of System.RPC and
 522       --  System.Garlic and special files of the form System.Aux...
 523
 524       Get_Name_String (Unit_Name (U));
 525
 526       if Name_Len > 12
 527         and then Name_Buffer (1 .. 11) = "system.rpc."
 528       then
 529          return Ada_95_Unit;
 530       end if;
 531
 532       if Name_Len > 15
 533         and then Name_Buffer (1 .. 14) = "system.garlic."
 534       then
 535          return Ada_95_Unit;
 536       end if;
 537
 538       if Name_Len > 11
 539         and then Name_Buffer (1 .. 10) = "system.aux"
 540       then
 541          return Ada_95_Unit;
 542       end if;
 543
 544       --  All tests failed, this is definitely an implementation unit
 545
 546       return Implementation_Unit;
 547    end Get_Kind_Of_Unit;
 548
 549    -------------------
 550    -- Is_Known_Unit --
 551    -------------------
 552
 553    function Is_Known_Unit (Nam : Node_Id) return Boolean is
 554       Unam : Unit_Name_Type;
 555       Fnam : File_Name_Type;
 556
 557    begin
 558       --  If selector is not an identifier (e.g. it is a character literal or
 559       --  some junk from a previous error), then definitely not a known unit.
 560
 561       if Nkind (Selector_Name (Nam)) /= N_Identifier then
 562          return False;
 563       end if;
 564
 565       --  Otherwise get corresponding file name
 566
 567       Unam := Get_Unit_Name (Nam);
 568       Fnam := Get_File_Name (Unam, Subunit => False);
 569       Get_Name_String (Fnam);
 570
 571       --  Remove extension from file name
 572
 573       if Name_Buffer (Name_Len - 3 .. Name_Len) = ".adb" then
 574          Name_Len := Name_Len - 4;
 575       else
 576          return False;
 577       end if;
 578
 579       --  Pad name to 8 characters
 580
 581       while Name_Len < 8 loop
 582          Name_Len := Name_Len + 1;
 583          Name_Buffer (Name_Len) := ' ';
 584       end loop;
 585
 586       --  If length more than 8, definitely not a match
 587
 588       if Name_Len /= 8 then
 589          return False;
 590       end if;
 591
 592       --  If length is 8, search our tables
 593
 594       for J in Non_Imp_File_Names_95'Range loop
 595          if Name_Buffer (1 .. 8) = Non_Imp_File_Names_95 (J) then
 596             return True;
 597          end if;
 598       end loop;
 599
 600       for J in Non_Imp_File_Names_05'Range loop
 601          if Name_Buffer (1 .. 8) = Non_Imp_File_Names_05 (J) then
 602             return True;
 603          end if;
 604       end loop;
 605
 606       --  If not found, not known
 607
 608       return False;
 609
 610    --  A safety guard, if we get an exception during this processing then it
 611    --  is most likely the result of a previous error, or a peculiar case we
 612    --  have not thought of. Since this routine is only used for error message
 613    --  refinement, we will just return False.
 614
 615    exception
 616       when others =>
 617          return False;
 618    end Is_Known_Unit;
 619
 620 end Impunit;