summaryrefslogtreecommitdiff
path: root/gcc/ada/fname.adb
blob: 48cb207054c360af91cdd53a79cfdab5a884f856 (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
------------------------------------------------------------------------------
--                                                                          --
--                         GNAT COMPILER COMPONENTS                         --
--                                                                          --
--                                F N A M E                                 --
--                                                                          --
--                                 B o d y                                  --
--                                                                          --
--          Copyright (C) 1992-2009, 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 3,  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.                                     --
--                                                                          --
-- As a special exception under Section 7 of GPL version 3, you are granted --
-- additional permissions described in the GCC Runtime Library Exception,   --
-- version 3.1, as published by the Free Software Foundation.               --
--                                                                          --
-- You should have received a copy of the GNU General Public License and    --
-- a copy of the GCC Runtime Library Exception along with this program;     --
-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
-- <http://www.gnu.org/licenses/>.                                          --
--                                                                          --
-- GNAT was originally developed  by the GNAT team at  New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc.      --
--                                                                          --
------------------------------------------------------------------------------

with Alloc;
with Hostparm; use Hostparm;
with Table;
with Types;    use Types;

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");

   ---------------------------
   -- 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
   begin
      Get_Name_String (Fname);
      return Is_Predefined_File_Name (Renamings_Included);
   end Is_Predefined_File_Name;

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

      Predef_Names : constant array (1 .. 11) of Str8 :=
        ("ada     ",       -- Ada
         "interfac",       -- Interfaces
         "system  ",       -- System

         --  Remaining entries are only considered if Renamings_Included true

         "calendar",       -- Calendar
         "machcode",       -- Machine_Code
         "unchconv",       -- Unchecked_Conversion
         "unchdeal",       -- Unchecked_Deallocation
         "directio",       -- Direct_IO
         "ioexcept",       -- IO_Exceptions
         "sequenio",       -- Sequential_IO
         "text_io ");      -- Text_IO

         Num_Entries : constant Natural :=
                         3 + 8 * Boolean'Pos (Renamings_Included);

   begin
      --  Remove extension (if present)

      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- followed by letter

      elsif Name_Len >=  3
        and then Name_Buffer (2) = '-'
        and then (Name_Buffer (1) = 'a'
                    or else
                  Name_Buffer (1) = 'i'
                    or else
                  Name_Buffer (1) = 's')
        and then (Name_Buffer (3) in 'a' .. 'z'
                    or else
                  Name_Buffer (3) in 'A' .. 'Z')
      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;