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 --                            $Revision$
  10 --                                                                          --
  11 --           Copyright (C) 2000-2001 Free Software Foundation, Inc.         --
  12 --                                                                          --
  13 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  14 -- terms of the  GNU General Public License as published  by the Free Soft- --
  15 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  16 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  17 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  18 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  19 -- for  more details.  You should have  received  a copy of the GNU General --
  20 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  21 -- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
  22 -- MA 02111-1307, USA.                                                      --
  23 --                                                                          --
  24 -- GNAT was originally developed  by the GNAT team at  New York University. --
  25 -- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
  26 --                                                                          --
  27 ------------------------------------------------------------------------------
  28
  29 with Lib;   use Lib;
  30 with Namet; use Namet;
  31 with Opt;   use Opt;
  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    --  The following is a giant string containing the concenated names
  39    --  of all non-implementation internal files, i.e. the complete list
  40    --  of files for internal units which a program may legitimately WITH.
  41
  42    --  Note that this list should match the list of units documented in
  43    --  the "GNAT Library" section of the GNAT Reference Manual.
  44
  45    Non_Imp_File_Names : File_List := (
  46
  47    -----------------------------------------------
  48    -- Ada Hierarchy Units from Reference Manual --
  49    -----------------------------------------------
  50
  51      "a-astaco",    -- Ada.Asynchronous_Task_Control
  52      "a-calend",    -- Ada.Calendar
  53      "a-chahan",    -- Ada.Characters.Handling
  54      "a-charac",    -- Ada.Characters
  55      "a-chlat1",    -- Ada.Characters.Latin_1
  56      "a-comlin",    -- Ada.Command_Line
  57      "a-decima",    -- Ada.Decimal
  58      "a-direio",    -- Ada.Direct_IO
  59      "a-dynpri",    -- Ada.Dynamic_Priorities
  60      "a-except",    -- Ada.Exceptions
  61      "a-finali",    -- Ada.Finalization
  62      "a-flteio",    -- Ada.Float_Text_IO
  63      "a-fwteio",    -- Ada.Float_Wide_Text_IO
  64      "a-inteio",    -- Ada.Integer_Text_IO
  65      "a-interr",    -- Ada.Interrupts
  66      "a-intnam",    -- Ada.Interrupts.Names
  67      "a-ioexce",    -- Ada.IO_Exceptions
  68      "a-iwteio",    -- Ada.Integer_Wide_Text_IO
  69      "a-ncelfu",    -- Ada.Numerics.Complex_Elementary_Functions
  70      "a-ngcefu",    -- Ada.Numerics.Generic_Complex_Elementary_Functions
  71      "a-ngcoty",    -- Ada.Numerics.Generic_Complex_Types
  72      "a-ngelfu",    -- Ada.Numerics.Generic_Elementary_Functions
  73      "a-nucoty",    -- Ada.Numerics.Complex_Types
  74      "a-nudira",    -- Ada.Numerics.Discrete_Random
  75      "a-nuelfu",    -- Ada.Numerics.Elementary_Functions
  76      "a-nuflra",    -- Ada.Numerics.Float_Random
  77      "a-numeri",    -- Ada.Numerics
  78      "a-reatim",    -- Ada.Real_Time
  79      "a-sequio",    -- Ada.Sequential_IO
  80      "a-stmaco",    -- Ada.Strings.Maps.Constants
  81      "a-storio",    -- Ada.Storage_IO
  82      "a-strbou",    -- Ada.Strings.Bounded
  83      "a-stream",    -- Ada.Streams
  84      "a-strfix",    -- Ada.Strings.Fixed
  85      "a-string",    -- Ada.Strings
  86      "a-strmap",    -- Ada.Strings.Maps
  87      "a-strunb",    -- Ada.Strings.Unbounded
  88      "a-ststio",    -- Ada.Streams.Stream_IO
  89      "a-stwibo",    -- Ada.Strings.Wide_Bounded
  90      "a-stwifi",    -- Ada.Strings.Wide_Fixed
  91      "a-stwima",    -- Ada.Strings.Wide_Maps
  92      "a-stwiun",    -- Ada.Strings.Wide_Unbounded
  93      "a-swmwco",    -- Ada.Strings.Wide_Maps.Wide_Constants
  94      "a-sytaco",    -- Ada.Synchronous_Task_Control
  95      "a-tags  ",    -- Ada.Tags
  96      "a-tasatt",    -- Ada.Task_Attributes
  97      "a-taside",    -- Ada.Task_Identification
  98      "a-teioed",    -- Ada.Text_IO.Editing
  99      "a-textio",    -- Ada.Text_IO
 100      "a-ticoio",    -- Ada.Text_IO.Complex_IO
 101      "a-titest",    -- Ada.Text_IO.Text_Streams
 102      "a-unccon",    -- Ada.Unchecked_Conversion
 103      "a-uncdea",    -- Ada.Unchecked_Deallocation
 104      "a-witeio",    -- Ada.Wide_Text_IO
 105      "a-wtcoio",    -- Ada.Wide_Text_IO.Complex_IO
 106      "a-wtedit",    -- Ada.Wide_Text_IO.Editing
 107      "a-wttest",    -- Ada.Wide_Text_IO.Text_Streams
 108
 109    -------------------------------------------------
 110    -- RM Required Additions to Ada for GNAT Types --
 111    -------------------------------------------------
 112
 113      "a-lfteio",    -- Ada.Long_Float_Text_IO
 114      "a-lfwtio",    -- Ada.Long_Float_Wide_Text_IO
 115      "a-liteio",    -- Ada.Long_Integer_Text_IO
 116      "a-liwtio",    -- Ada.Long_Integer_Wide_Text_IO
 117      "a-llftio",    -- Ada.Long_Long_Float_Text_IO
 118      "a-llfwti",    -- Ada.Long_Long_Float_Wide_Text_IO
 119      "a-llitio",    -- Ada.Long_Long_Integer_Text_IO
 120      "a-lliwti",    -- Ada.Long_Long_Integer_Wide_Text_IO
 121      "a-nlcefu",    -- Ada.Long_Complex_Elementary_Functions
 122      "a-nlcoty",    -- Ada.Numerics.Long_Complex_Types
 123      "a-nlelfu",    -- Ada.Numerics.Long_Elementary_Functions
 124      "a-nllcef",    -- Ada.Long_Long_Complex_Elementary_Functions
 125      "a-nllefu",    -- Ada.Numerics.Long_Long_Elementary_Functions
 126      "a-nltcty",    -- Ada.Numerics.Long_Long_Complex_Types
 127      "a-nscefu",    -- Ada.Short_Complex_Elementary_Functions
 128      "a-nscoty",    -- Ada.Numerics.Short_Complex_Types
 129      "a-nselfu",    -- Ada.Numerics.Short_Elementary_Functions
 130      "a-sfteio",    -- Ada.Short_Float_Text_IO
 131      "a-sfwtio",    -- Ada.Short_Float_Wide_Text_IO
 132      "a-siteio",    -- Ada.Short_Integer_Text_IO
 133      "a-siwtio",    -- Ada.Short_Integer_Wide_Text_IO
 134      "a-ssitio",    -- Ada.Short_Short_Integer_Text_IO
 135      "a-ssiwti",    -- Ada.Short_Short_Integer_Wide_Text_IO
 136
 137    -----------------------------------
 138    -- GNAT Defined Additions to Ada --
 139    -----------------------------------
 140
 141      "a-colire",    -- Ada.Command_Line.Remove
 142      "a-cwila1",    -- Ada.Characters.Wide_Latin_1
 143      "a-diocst",    -- Ada.Direct_IO.C_Streams
 144      "a-einuoc",    -- Ada.Exceptions.Is_Null_Occurrence
 145      "a-siocst",    -- Ada.Sequential_IO.C_Streams
 146      "a-ssicst",    -- Ada.Streams.Stream_IO.C_Streams
 147      "a-suteio",    -- Ada.Strings.Unbounded.Text_IO
 148      "a-swuwti",    -- Ada.Strings.Wide_Unbounded.Wide_Text_IO
 149      "a-taidim",    -- Ada.Task_Identification.Image
 150      "a-tiocst",    -- Ada.Text_IO.C_Streams
 151      "a-wtcstr",    -- Ada.Wide_Text_IO.C_Streams
 152
 153    ---------------------------
 154    -- GNAT Special IO Units --
 155    ---------------------------
 156
 157    --  As further explained elsewhere (see Sem_Ch10), the internal
 158    --  packages of Text_IO and Wide_Text_IO are actually implemented
 159    --  as separate children, but this fact is intended to be hidden
 160    --  from the user completely. Any attempt to WITH one of these
 161    --  units will be diagnosed as an error later on, but for now we
 162    --  do not consider these internal implementation units (if we did,
 163    --  then we would get a junk warning which would be confusing and
 164    --  unecessary, given that we generate a clear error message).
 165
 166      "a-tideio",    -- Ada.Text_IO.Decimal_IO
 167      "a-tienio",    -- Ada.Text_IO.Enumeration_IO
 168      "a-tifiio",    -- Ada.Text_IO.Fixed_IO
 169      "a-tiflio",    -- Ada.Text_IO.Float_IO
 170      "a-tiinio",    -- Ada.Text_IO.Integer_IO
 171      "a-tiinio",    -- Ada.Text_IO.Integer_IO
 172      "a-timoio",    -- Ada.Text_IO.Modular_IO
 173      "a-wtdeio",    -- Ada.Wide_Text_IO.Decimal_IO
 174      "a-wtenio",    -- Ada.Wide_Text_IO.Enumeration_IO
 175      "a-wtfiio",    -- Ada.Wide_Text_IO.Fixed_IO
 176      "a-wtflio",    -- Ada.Wide_Text_IO.Float_IO
 177      "a-wtinio",    -- Ada.Wide_Text_IO.Integer_IO
 178      "a-wtmoio",    -- Ada.Wide_Text_IO.Modular_IO
 179
 180    ------------------------
 181    -- GNAT Library Units --
 182    ------------------------
 183
 184      "g-awk   ",    -- GNAT.AWK
 185      "g-busora",    -- GNAT.Bubble_Sort_A
 186      "g-busorg",    -- GNAT.Bubble_Sort_G
 187      "g-calend",    -- GNAT.Calendar
 188      "g-catiio",    -- GNAT.Calendar.Time_IO
 189      "g-casuti",    -- GNAT.Case_Util
 190      "g-cgi   ",    -- GNAT.CGI
 191      "g-cgicoo",    -- GNAT.CGI.Cookie
 192      "g-cgideb",    -- GNAT.CGI.Debug
 193      "g-comlin",    -- GNAT.Command_Line
 194      "g-crc32 ",    -- GNAT.CRC32
 195      "g-curexc",    -- GNAT.Current_Exception
 196      "g-debpoo",    -- GNAT.Debug_Pools
 197      "g-debuti",    -- GNAT.Debug_Utilities
 198      "g-dirope",    -- GNAT.Directory_Operations
 199      "g-dyntab",    -- GNAT.Dynamic_Tables
 200      "g-exctra",    -- GNAT.Exception_Traces
 201      "g-expect",    -- GNAT.Expect
 202      "g-flocon",    -- GNAT.Float_Control
 203      "g-htable",    -- GNAT.Htable
 204      "g-hesora",    -- GNAT.Heap_Sort_A
 205      "g-hesorg",    -- GNAT.Heap_Sort_G
 206      "g-io    ",    -- GNAT.IO
 207      "g-io_aux",    -- GNAT.IO_Aux
 208      "g-locfil",    -- GNAT.Lock_Files
 209      "g-moreex",    -- GNAT.Most_Recent_Exception
 210      "g-os_lib",    -- GNAT.Os_Lib
 211      "g-regexp",    -- GNAT.Regexp
 212      "g-regist",    -- GNAT.Registry
 213      "g-regpat",    -- GNAT.Regpat
 214      "g-socket",    -- GNAT.Sockets
 215      "g-sptabo",    -- GNAT.Spitbol.Table_Boolean
 216      "g-sptain",    -- GNAT.Spitbol.Table_Integer
 217      "g-sptavs",    -- GNAT.Spitbol.Table_Vstring
 218      "g-souinf",    -- GNAT.Source_Info
 219      "g-speche",    -- GNAT.Spell_Checker
 220      "g-spitbo",    -- GNAT.Spitbol
 221      "g-spipat",    -- GNAT.Spitbol.Patterns
 222      "g-table ",    -- GNAT.Table
 223      "g-tasloc",    -- GNAT.Task_Lock
 224      "g-thread",    -- GNAT.Threads
 225      "g-traceb",    -- GNAT.Traceback
 226      "g-trasym",    -- GNAT.Traceback.Symbolic
 227
 228    -----------------------------------------------------
 229    -- Interface Hierarchy Units from Reference Manual --
 230    -----------------------------------------------------
 231
 232      "i-c     ",    -- Interfaces.C
 233      "i-cobol ",    -- Interfaces.Cobol
 234      "i-cpoint",    -- Interfaces.C.Pointers
 235      "i-cstrin",    -- Interfaces.C.Strings
 236      "i-fortra",    -- Interfaces.Fortran
 237
 238    ------------------------------------------
 239    -- GNAT Defined Additions to Interfaces --
 240    ------------------------------------------
 241
 242      "i-cexten",    -- Interfaces.C.Extensions
 243      "i-csthre",    -- Interfaces.C.Sthreads
 244      "i-cstrea",    -- Interfaces.C.Streams
 245      "i-cpp   ",    -- Interfaces.CPP
 246      "i-java  ",    -- Interfaces.Java
 247      "i-javlan",    -- Interfaces.Java.Lang
 248      "i-jalaob",    -- Interfaces.Java.Lang.Object
 249      "i-jalasy",    -- Interfaces.Java.Lang.System
 250      "i-jalath",    -- Interfaces.Java.Lang.Thread
 251      "i-os2err",    -- Interfaces.Os2lib.Errors
 252      "i-os2lib",    -- Interfaces.Os2lib
 253      "i-os2syn",    -- Interfaces.Os2lib.Synchronization
 254      "i-os2thr",    -- Interfaces.Os2lib.Threads
 255      "i-pacdec",    -- Interfaces.Packed_Decimal
 256      "i-vxwork",    -- Interfaces.Vxworks
 257
 258    --------------------------------------------------
 259    -- System Hierarchy Units from Reference Manual --
 260    --------------------------------------------------
 261
 262      "s-atacco",    -- System.Address_To_Access_Conversions
 263      "s-maccod",    -- System.Machine_Code
 264      "s-rpc   ",    -- System.Rpc
 265      "s-stoele",    -- System.Storage_Elements
 266      "s-stopoo",    -- System.Storage_Pools
 267
 268    --------------------------------------
 269    -- GNAT Defined Additions to System --
 270    --------------------------------------
 271
 272      "s-addima",    -- System.Address_Image
 273      "s-assert",    -- System.Assertions
 274      "s-parint",    -- System.Partition_Interface
 275      "s-tasinf",    -- System.Task_Info
 276      "s-wchcnv",    -- System.Wch_Cnv
 277      "s-wchcon");   -- System.Wch_Con
 278
 279    -------------------------
 280    -- Implementation_Unit --
 281    -------------------------
 282
 283    function Implementation_Unit (U : Unit_Number_Type) return Boolean is
 284       Fname : constant File_Name_Type := Unit_File_Name (U);
 285
 286    begin
 287       --  All units are OK in GNAT mode
 288
 289       if GNAT_Mode then
 290          return False;
 291       end if;
 292
 293       --  If length of file name is greater than 12, definitely OK!
 294       --  The value 12 here is an 8 char name with extension .ads.
 295
 296       if Length_Of_Name (Fname) > 12 then
 297          return False;
 298       end if;
 299
 300       --  Otherwise test file name
 301
 302       Get_Name_String (Fname);
 303
 304       --  Definitely OK if file name does not start with a- g- s- i-
 305
 306       if Name_Len < 3
 307         or else Name_Buffer (2) /= '-'
 308         or else (Name_Buffer (1) /= 'a'
 309                    and then
 310                  Name_Buffer (1) /= 'g'
 311                    and then
 312                  Name_Buffer (1) /= 'i'
 313                    and then
 314                  Name_Buffer (1) /= 's')
 315       then
 316          return False;
 317       end if;
 318
 319       --  Definitely OK if file name does not end in .ads. This can
 320       --  happen when non-standard file names are being used.
 321
 322       if Name_Buffer (Name_Len - 3 .. Name_Len) /= ".ads" then
 323          return False;
 324       end if;
 325
 326       --  Otherwise normalize file name to 8 characters
 327
 328       Name_Len := Name_Len - 4;
 329       while Name_Len < 8 loop
 330          Name_Len := Name_Len + 1;
 331          Name_Buffer (Name_Len) := ' ';
 332       end loop;
 333
 334       --  Definitely OK if name is in list
 335
 336       for J in Non_Imp_File_Names'Range loop
 337          if Name_Buffer (1 .. 8) = Non_Imp_File_Names (J) then
 338             return False;
 339          end if;
 340       end loop;
 341
 342       --  Only remaining special possibilities are children of
 343       --  System.RPC and System.Garlic and special files of the
 344       --  form System.Aux...
 345
 346       Get_Name_String (Unit_Name (U));
 347
 348       if Name_Len > 12
 349         and then Name_Buffer (1 .. 11) = "system.rpc."
 350       then
 351          return False;
 352       end if;
 353
 354       if Name_Len > 15
 355         and then Name_Buffer (1 .. 14) = "system.garlic."
 356       then
 357          return False;
 358       end if;
 359
 360       if Name_Len > 11
 361         and then Name_Buffer (1 .. 10) = "system.aux"
 362       then
 363          return False;
 364       end if;
 365
 366       --  All tests failed, this is definitely an implementation unit
 367
 368       return True;
 369
 370    end Implementation_Unit;
 371
 372 end Impunit;