summaryrefslogtreecommitdiff
path: root/gcc/ada/fname.adb
blob: 7ac38bbc52d5bb9b6ad23714fae9bf739b12e3b6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
------------------------------------------------------------------------------
--                                                                          --
--                         GNAT COMPILER COMPONENTS                         --
--                                                                          --
--                                F N A M E                                 --
--                                                                          --
--                                 B o d y                                  --
--                                                                          --
--                            $Revision: 1.64 $
--                                                                          --
--          Copyright (C) 1992-2001, Free Software Foundation, Inc.         --
--                                                                          --
-- GNAT is free software;  you can  redistribute it  and/or modify it under --
-- terms of the  GNU General Public License as published  by the Free Soft- --
-- ware  Foundation;  either version 2,  or (at your option) any later ver- --
-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
-- for  more details.  You should have  received  a copy of the GNU General --
-- Public License  distributed with GNAT;  see file COPYING.  If not, write --
-- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
-- MA 02111-1307, USA.                                                      --
--                                                                          --
-- As a special exception,  if other files  instantiate  generics from this --
-- unit, or you link  this unit with other files  to produce an executable, --
-- this  unit  does not  by itself cause  the resulting  executable  to  be --
-- covered  by the  GNU  General  Public  License.  This exception does not --
-- however invalidate  any other reasons why  the executable file  might be --
-- covered by the  GNU Public License.                                      --
--                                                                          --
-- GNAT was originally developed  by the GNAT team at  New York University. --
-- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
--                                                                          --
------------------------------------------------------------------------------

with Alloc;
with Hostparm; use Hostparm;
with Namet;    use Namet;
with Table;

package body Fname is

   -----------------------------
   -- Dummy Table Definitions --
   -----------------------------

   --  The following table was used in old versions of the compiler. We retain
   --  the declarations here for compatibility with old tree files. The new
   --  version of the compiler does not use this table, and will write out a
   --  dummy empty table for Tree_Write.

   type SFN_Entry is record
      U : Unit_Name_Type;
      F : File_Name_Type;
   end record;

   package SFN_Table is new Table.Table (
     Table_Component_Type => SFN_Entry,
     Table_Index_Type     => Int,
     Table_Low_Bound      => 0,
     Table_Initial        => Alloc.SFN_Table_Initial,
     Table_Increment      => Alloc.SFN_Table_Increment,
     Table_Name           => "Fname_Dummy_Table");
   ----------------------------
   -- Get_Expected_Unit_Type --
   ----------------------------

   --  We assume that a file name whose last character is a lower case b is
   --  a body and a file name whose last character is a lower case s is a
   --  spec. If any other character is found (e.g. when we are in syntax
   --  checking only mode, where the file name conventions are not set),
   --  then we return Unknown.

   function Get_Expected_Unit_Type
     (Fname : File_Name_Type)
      return  Expected_Unit_Type
   is
   begin
      Get_Name_String (Fname);

      if Name_Buffer (Name_Len) = 'b' then
         return Expect_Body;
      elsif Name_Buffer (Name_Len) = 's' then
         return Expect_Spec;
      else
         return Unknown;
      end if;
   end Get_Expected_Unit_Type;

   ---------------------------
   -- Is_Internal_File_Name --
   ---------------------------

   function Is_Internal_File_Name
     (Fname              : File_Name_Type;
      Renamings_Included : Boolean := True)
      return               Boolean
   is
   begin
      if Is_Predefined_File_Name (Fname, Renamings_Included) then
         return True;

      --  Once Is_Predefined_File_Name has been called and returns False,
      --  Name_Buffer contains Fname and Name_Len is set to 8.

      elsif Name_Buffer (1 .. 2) = "g-"
        or else Name_Buffer (1 .. 8) = "gnat    "
      then
         return True;

      elsif OpenVMS
        and then
          (Name_Buffer (1 .. 4) = "dec-"
             or else Name_Buffer (1 .. 8) = "dec     ")
      then
         return True;

      else
         return False;
      end if;
   end Is_Internal_File_Name;

   -----------------------------
   -- Is_Predefined_File_Name --
   -----------------------------

   --  This should really be a test of unit name, given the possibility of
   --  pragma Source_File_Name setting arbitrary file names for any files???

   --  Once Is_Predefined_File_Name has been called and returns False,
   --  Name_Buffer contains Fname and Name_Len is set to 8. This is used
   --  only by Is_Internal_File_Name, and is not part of the official
   --  external interface of this function.

   function Is_Predefined_File_Name
     (Fname              : File_Name_Type;
      Renamings_Included : Boolean := True)
      return               Boolean
   is
      subtype Str8 is String (1 .. 8);

      Predef_Names : array (1 .. 11) of Str8 :=
        ("ada     ",       -- Ada
         "calendar",       -- Calendar
         "interfac",       -- Interfaces
         "system  ",       -- System
         "machcode",       -- Machine_Code
         "unchconv",       -- Unchecked_Conversion
         "unchdeal",       -- Unchecked_Deallocation

         --  Remaining entries are only considered if Renamings_Included true

         "directio",       -- Direct_IO
         "ioexcept",       -- IO_Exceptions
         "sequenio",       -- Sequential_IO
         "text_io ");      -- Text_IO

         Num_Entries : constant Natural :=
                         7 + 4 * Boolean'Pos (Renamings_Included);

   begin
      --  Get file name, removing the extension (if any)

      Get_Name_String (Fname);

      if Name_Len > 4 and then Name_Buffer (Name_Len - 3) = '.' then
         Name_Len := Name_Len - 4;
      end if;

      --  Definitely false if longer than 12 characters (8.3)

      if Name_Len > 8 then
         return False;

      --  Definitely predefined if prefix is a- i- or s-

      elsif Name_Len > 2
        and then Name_Buffer (2) = '-'
        and then (Name_Buffer (1) = 'a' or else
                  Name_Buffer (1) = 'i' or else
                  Name_Buffer (1) = 's')
      then
         return True;
      end if;

      --  Otherwise check against special list, first padding to 8 characters

      while Name_Len < 8 loop
         Name_Len := Name_Len + 1;
         Name_Buffer (Name_Len) := ' ';
      end loop;

      for J in 1 .. Num_Entries loop
         if Name_Buffer (1 .. 8) = Predef_Names (J) then
            return True;
         end if;
      end loop;

      --  Note: when we return False here, the Name_Buffer contains the
      --  padded file name. This is not defined for clients of the package,
      --  but is used by Is_Internal_File_Name.

      return False;
   end Is_Predefined_File_Name;

   ---------------
   -- Tree_Read --
   ---------------

   procedure Tree_Read is
   begin
      SFN_Table.Tree_Read;
   end Tree_Read;

   ----------------
   -- Tree_Write --
   ----------------

   procedure Tree_Write is
   begin
      SFN_Table.Tree_Write;
   end Tree_Write;

end Fname;