1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2004, Free Software Foundation, Inc. --
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 2, 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 COPYING. If not, write --
19 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
20 -- MA 02111-1307, USA. --
22 -- GNAT was originally developed by the GNAT team at New York University. --
23 -- Extensive contributions were provided by Ada Core Technologies Inc. --
25 ------------------------------------------------------------------------------
28 with Debug; use Debug;
31 with Namet; use Namet;
33 with Osint; use Osint;
35 with Widechar; use Widechar;
39 package body Fname.UF is
41 --------------------------------------------------------
42 -- Declarations for Handling Source_File_Name pragmas --
43 --------------------------------------------------------
45 type SFN_Entry is record
46 U : Unit_Name_Type; -- Unit name
47 F : File_Name_Type; -- Spec/Body file name
49 -- Record single Unit_Name type call to Set_File_Name
51 package SFN_Table is new Table.Table (
52 Table_Component_Type => SFN_Entry,
53 Table_Index_Type => Int,
55 Table_Initial => Alloc.SFN_Table_Initial,
56 Table_Increment => Alloc.SFN_Table_Increment,
57 Table_Name => "SFN_Table");
58 -- Table recording all Unit_Name calls to Set_File_Name
60 type SFN_Header_Num is range 0 .. 100;
62 function SFN_Hash (F : Unit_Name_Type) return SFN_Header_Num;
63 -- Compute hash index for use by Simple_HTable
65 No_Entry : constant Int := -1;
66 -- Signals no entry in following table
68 package SFN_HTable is new GNAT.HTable.Simple_HTable (
69 Header_Num => SFN_Header_Num,
71 No_Element => No_Entry,
72 Key => Unit_Name_Type,
75 -- Hash table allowing rapid access to SFN_Table, the element value
76 -- is an index into this table.
78 type SFN_Pattern_Entry is record
79 Pat : String_Ptr; -- File name pattern (with asterisk in it)
80 Typ : Character; -- 'S'/'B'/'U' for spec/body/subunit
81 Dot : String_Ptr; -- Dot_Separator string
82 Cas : Casing_Type; -- Upper/Lower/Mixed
84 -- Records single call to Set_File_Name_Patterm
86 package SFN_Patterns is new Table.Table (
87 Table_Component_Type => SFN_Pattern_Entry,
88 Table_Index_Type => Int,
91 Table_Increment => 100,
92 Table_Name => "SFN_Patterns");
93 -- Table recording all calls to Set_File_Name_Pattern. Note that the
94 -- first two entries are set to represent the standard GNAT rules
97 -----------------------
98 -- File_Name_Of_Body --
99 -----------------------
101 function File_Name_Of_Body (Name : Name_Id) return File_Name_Type is
103 Get_Name_String (Name);
104 Name_Buffer (Name_Len + 1 .. Name_Len + 2) := "%b";
105 Name_Len := Name_Len + 2;
106 return Get_File_Name (Name_Enter, Subunit => False);
107 end File_Name_Of_Body;
109 -----------------------
110 -- File_Name_Of_Spec --
111 -----------------------
113 function File_Name_Of_Spec (Name : Name_Id) return File_Name_Type is
115 Get_Name_String (Name);
116 Name_Buffer (Name_Len + 1 .. Name_Len + 2) := "%s";
117 Name_Len := Name_Len + 2;
118 return Get_File_Name (Name_Enter, Subunit => False);
119 end File_Name_Of_Spec;
125 function Get_File_Name
126 (Uname : Unit_Name_Type;
128 May_Fail : Boolean := False) return File_Name_Type
130 Unit_Char : Character;
131 -- Set to 's' or 'b' for spec or body or to 'u' for a subunit
133 Unit_Char_Search : Character;
134 -- Same as Unit_Char, except that in the case of 'u' for a subunit,
135 -- we set Unit_Char_Search to 'b' if we do not find a subunit match.
139 Pname : File_Name_Type := No_File;
140 Fname : File_Name_Type := No_File;
141 -- Path name and File name for mapping
144 -- Null or error name means that some previous error occurred
145 -- This is an unrecoverable error, so signal it.
147 if Uname <= Error_Name then
148 raise Unrecoverable_Error;
151 -- Look in the map from unit names to file names
153 Fname := Mapped_File_Name (Uname);
155 -- If the unit name is already mapped, return the corresponding
156 -- file name from the map.
158 if Fname /= No_File then
162 -- If there is a specific SFN pragma, return the corresponding file name
164 N := SFN_HTable.Get (Uname);
166 if N /= No_Entry then
167 return SFN_Table.Table (N).F;
170 -- Here for the case where the name was not found in the table
172 Get_Decoded_Name_String (Uname);
174 -- A special fudge, normally we don't have operator symbols present,
175 -- since it is always an error to do so. However, if we do, at this
176 -- stage it has a leading double quote.
178 -- What we do in this case is to go back to the undecoded name, which
179 -- is of the form, for example:
183 -- and build a file name that looks like:
187 -- which is bit peculiar, but we keep it that way. This means that
188 -- we avoid bombs due to writing a bad file name, and w get expected
189 -- error processing downstream, e.g. a compilation following gnatchop.
191 if Name_Buffer (1) = '"' then
192 Get_Name_String (Uname);
193 Name_Len := Name_Len + 1;
194 Name_Buffer (Name_Len) := Name_Buffer (Name_Len - 1);
195 Name_Buffer (Name_Len - 1) := Name_Buffer (Name_Len - 2);
196 Name_Buffer (Name_Len - 2) := '_';
197 Name_Buffer (1) := '_';
200 -- Deal with spec or body suffix
202 Unit_Char := Name_Buffer (Name_Len);
203 pragma Assert (Unit_Char = 'b' or else Unit_Char = 's');
204 pragma Assert (Name_Len >= 3 and then Name_Buffer (Name_Len - 1) = '%');
205 Name_Len := Name_Len - 2;
211 -- Now we need to find the proper translation of the name
214 Uname : constant String (1 .. Name_Len) :=
215 Name_Buffer (1 .. Name_Len);
219 Fnam : File_Name_Type := No_File;
225 -- Set True for predefined file
227 function C (N : Natural) return Character;
228 -- Return N'th character of pattern
230 function C (N : Natural) return Character is
232 return SFN_Patterns.Table (Pent).Pat (N);
235 -- Start of search through pattern table
238 -- Search pattern table to find a matching entry. In the general
239 -- case we do two complete searches. The first time through we
240 -- stop only if a matching file is found, the second time through
241 -- we accept the first match regardless. Note that there will
242 -- always be a match the second time around, because of the
243 -- default entries at the end of the table.
245 for No_File_Check in False .. True loop
246 Unit_Char_Search := Unit_Char;
249 -- The search is repeated with Unit_Char_Search set to b, if an
250 -- initial search for the subunit case fails to find any match.
252 Pent := SFN_Patterns.First;
253 while Pent <= SFN_Patterns.Last loop
254 if SFN_Patterns.Table (Pent).Typ = Unit_Char_Search then
257 -- Determine if we have a predefined file name
259 Name_Len := Uname'Length;
260 Name_Buffer (1 .. Name_Len) := Uname;
262 Is_Predefined_File_Name (Renamings_Included => True);
264 -- Found a match, execute the pattern
266 Name_Len := Uname'Length;
267 Name_Buffer (1 .. Name_Len) := Uname;
269 -- Apply casing, except that we do not do this for the case
270 -- of a predefined library file. For the latter, we always
271 -- use the all lower case name, regardless of the setting.
273 if not Is_Predef then
274 Set_Casing (SFN_Patterns.Table (Pent).Cas);
277 -- If dot translation required do it
279 Dot := SFN_Patterns.Table (Pent).Dot;
280 Dotl := Dot.all'Length;
282 if Dot.all /= "." then
285 while J <= Name_Len loop
286 if Name_Buffer (J) = '.' then
289 Name_Buffer (J) := Dot (Dot'First);
292 Name_Buffer (J + Dotl .. Name_Len + Dotl - 1) :=
293 Name_Buffer (J + 1 .. Name_Len);
294 Name_Buffer (J .. J + Dotl - 1) := Dot.all;
295 Name_Len := Name_Len + Dotl - 1;
300 -- Skip past wide char sequences to avoid messing
301 -- with dot characters that are part of a sequence.
303 elsif Name_Buffer (J) = ASCII.ESC
304 or else (Upper_Half_Encoding
306 Name_Buffer (J) in Upper_Half_Character)
308 Skip_Wide (Name_Buffer, J);
315 -- Here move result to right if preinsertion before *
317 Plen := SFN_Patterns.Table (Pent).Pat'Length;
318 for K in 1 .. Plen loop
321 Name_Buffer (1 + K - 1 .. Name_Len + K - 1) :=
322 Name_Buffer (1 .. Name_Len);
324 for L in 1 .. K - 1 loop
325 Name_Buffer (L) := C (L);
328 Name_Len := Name_Len + K - 1;
331 for L in K + 1 .. Plen loop
332 Name_Len := Name_Len + 1;
333 Name_Buffer (Name_Len) := C (L);
340 -- Execute possible crunch on constructed name. The krunch
341 -- operation excludes any extension that may be present.
345 exit when Name_Buffer (J) = '.';
349 -- Case of extension present
353 Ext : constant String := Name_Buffer (J .. Name_Len);
360 -- Krunch what's left
365 Integer (Maximum_File_Name_Length),
371 (Name_Len + 1 .. Name_Len + Ext'Length) := Ext;
372 Name_Len := Name_Len + Ext'Length;
375 -- Case of no extension present, straight krunch on
376 -- the entire file name.
382 Integer (Maximum_File_Name_Length),
386 Fnam := File_Name_Type (Name_Find);
388 -- If we are in the second search of the table, we accept
389 -- the file name without checking, because we know that
390 -- the file does not exist.
392 if No_File_Check then
400 -- Otherwise we check if the file exists
403 Pname := Find_File (Fnam, Source);
405 -- If it does exist, we add it to the mappings and
406 -- return the file name.
408 if Pname /= No_File then
410 -- Add to mapping, so that we don't do another
411 -- path search in Find_File for this file name
412 -- and, if we use a mapping file, we are ready
413 -- to update it at the end of this compilation
414 -- for the benefit of other compilation processes.
416 Add_To_File_Map (Get_File_Name.Uname, Fnam, Pname);
419 -- If there are only two entries, they are those of
420 -- the default GNAT naming scheme. The file does
421 -- not exist, but there is no point doing the
422 -- second search, because we will end up with the
423 -- same file name. Just return the file name.
425 elsif SFN_Patterns.Last = 2 then
428 -- The file does not exist, but there may be other
429 -- naming scheme. Keep on searching.
440 -- If search failed, and was for a subunit, repeat the search
441 -- with Unit_Char_Search reset to 'b', since in the normal case
442 -- we simply treat subunits as bodies.
444 if Fnam = No_File and then Unit_Char_Search = 'u' then
445 Unit_Char_Search := 'b';
449 -- Repeat entire search in No_File_Check mode if necessary
453 -- Something is wrong if search fails completely, since the
454 -- default entries should catch all possibilities at this stage.
464 procedure Initialize is
469 -- Add default entries to SFN_Patterns.Table to represent the
470 -- standard default GNAT rules for file name translation.
472 SFN_Patterns.Append (New_Val =>
473 (Pat => new String'("*.ads"),
475 Dot => new String'("-"),
476 Cas => All_Lower_Case));
478 SFN_Patterns.Append (New_Val =>
479 (Pat => new String'("*.adb"),
481 Dot => new String'("-"),
482 Cas => All_Lower_Case));
491 SFN_Table.Locked := True;
499 procedure Set_File_Name (U : Unit_Name_Type; F : File_Name_Type) is
501 SFN_Table.Increment_Last;
502 SFN_Table.Table (SFN_Table.Last) := (U, F);
503 SFN_HTable.Set (U, SFN_Table.Last);
506 ---------------------------
507 -- Set_File_Name_Pattern --
508 ---------------------------
510 procedure Set_File_Name_Pattern
516 L : constant Nat := SFN_Patterns.Last;
518 SFN_Patterns.Increment_Last;
520 -- Move up the last two entries (the default ones) and then
521 -- put the new entry into the table just before them (we
522 -- always have the default entries be the last ones).
524 SFN_Patterns.Table (L + 1) := SFN_Patterns.Table (L);
525 SFN_Patterns.Table (L) := SFN_Patterns.Table (L - 1);
526 SFN_Patterns.Table (L - 1) := (Pat, Typ, Dot, Cas);
527 end Set_File_Name_Pattern;
533 function SFN_Hash (F : Unit_Name_Type) return SFN_Header_Num is
535 return SFN_Header_Num (Int (F) rem SFN_Header_Num'Range_Length);
540 -- We call the initialization routine from the package body, so that
541 -- Fname.Init only needs to be called explicitly to reinitialize.