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------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- F M A P --
-- --
-- B o d y --
-- --
-- $Revision: 1.7 $
-- --
-- Copyright (C) 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. --
-- --
-- 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 GNAT.OS_Lib; use GNAT.OS_Lib;
with Namet; use Namet;
with Opt; use Opt;
with Osint; use Osint;
with Output; use Output;
with Table;
with Unchecked_Conversion;
with GNAT.HTable;
package body Fmap is
subtype Big_String is String (Positive);
type Big_String_Ptr is access all Big_String;
function To_Big_String_Ptr is new Unchecked_Conversion
(Source_Buffer_Ptr, Big_String_Ptr);
type Mapping is record
Uname : Unit_Name_Type;
Fname : File_Name_Type;
end record;
package File_Mapping is new Table.Table (
Table_Component_Type => Mapping,
Table_Index_Type => Int,
Table_Low_Bound => 0,
Table_Initial => 1_000,
Table_Increment => 1_000,
Table_Name => "Fmap.File_Mapping");
-- Mapping table to map unit names to file names.
package Path_Mapping is new Table.Table (
Table_Component_Type => Mapping,
Table_Index_Type => Int,
Table_Low_Bound => 0,
Table_Initial => 1_000,
Table_Increment => 1_000,
Table_Name => "Fmap.Path_Mapping");
-- Mapping table to map file names to path names
type Header_Num is range 0 .. 1_000;
function Hash (F : Unit_Name_Type) return Header_Num;
-- Function used to compute hash of unit name
No_Entry : constant Int := -1;
-- Signals no entry in following table
package Unit_Hash_Table is new GNAT.HTable.Simple_HTable (
Header_Num => Header_Num,
Element => Int,
No_Element => No_Entry,
Key => Unit_Name_Type,
Hash => Hash,
Equal => "=");
-- Hash table to map unit names to file names. Used in conjunction with
-- table File_Mapping above.
package File_Hash_Table is new GNAT.HTable.Simple_HTable (
Header_Num => Header_Num,
Element => Int,
No_Element => No_Entry,
Key => File_Name_Type,
Hash => Hash,
Equal => "=");
-- Hash table to map file names to path names. Used in conjunction with
-- table Path_Mapping above.
Last_In_Table : Int := 0;
---------------------
-- Add_To_File_Map --
---------------------
procedure Add_To_File_Map
(Unit_Name : Unit_Name_Type;
File_Name : File_Name_Type;
Path_Name : File_Name_Type)
is
begin
File_Mapping.Increment_Last;
Unit_Hash_Table.Set (Unit_Name, File_Mapping.Last);
File_Mapping.Table (File_Mapping.Last) :=
(Uname => Unit_Name, Fname => File_Name);
Path_Mapping.Increment_Last;
File_Hash_Table.Set (File_Name, Path_Mapping.Last);
Path_Mapping.Table (Path_Mapping.Last) :=
(Uname => Unit_Name, Fname => Path_Name);
end Add_To_File_Map;
----------
-- Hash --
----------
function Hash (F : Unit_Name_Type) return Header_Num is
begin
return Header_Num (Int (F) rem Header_Num'Range_Length);
end Hash;
----------------
-- Initialize --
----------------
procedure Initialize (File_Name : String) is
Src : Source_Buffer_Ptr;
Hi : Source_Ptr;
BS : Big_String_Ptr;
SP : String_Ptr;
First : Positive := 1;
Last : Natural := 0;
Uname : Unit_Name_Type;
Fname : Name_Id;
Pname : Name_Id;
The_Mapping : Mapping;
procedure Empty_Tables;
-- Remove all entries in case of incorrect mapping file
procedure Get_Line;
-- Get a line from the mapping file
procedure Report_Truncated;
-- Report a warning when the mapping file is truncated
-- (number of lines is not a multiple of 3).
------------------
-- Empty_Tables --
------------------
procedure Empty_Tables is
begin
Unit_Hash_Table.Reset;
File_Hash_Table.Reset;
Path_Mapping.Set_Last (0);
File_Mapping.Set_Last (0);
Last_In_Table := 0;
end Empty_Tables;
--------------
-- Get_Line --
--------------
procedure Get_Line is
use ASCII;
begin
First := Last + 1;
-- If not at the end of file, skip the end of line
while First < SP'Last
and then (SP (First) = CR
or else SP (First) = LF
or else SP (First) = EOF)
loop
First := First + 1;
end loop;
-- If not at the end of file, find the end of this new line
if First < SP'Last and then SP (First) /= EOF then
Last := First;
while Last < SP'Last
and then SP (Last + 1) /= CR
and then SP (Last + 1) /= LF
and then SP (Last + 1) /= EOF
loop
Last := Last + 1;
end loop;
end if;
end Get_Line;
----------------------
-- Report_Truncated --
----------------------
procedure Report_Truncated is
begin
if not Quiet_Output then
Write_Str ("warning: mapping file """);
Write_Str (File_Name);
Write_Line (""" is truncated");
end if;
end Report_Truncated;
-- Start of procedure Initialize
begin
Empty_Tables;
Name_Len := File_Name'Length;
Name_Buffer (1 .. Name_Len) := File_Name;
Read_Source_File (Name_Enter, 0, Hi, Src, Config);
if Src = null then
if not Quiet_Output then
Write_Str ("warning: could not read mapping file """);
Write_Str (File_Name);
Write_Line ("""");
end if;
else
BS := To_Big_String_Ptr (Src);
SP := BS (1 .. Natural (Hi))'Unrestricted_Access;
loop
-- Get the unit name
Get_Line;
-- Exit if end of file has been reached
exit when First > Last;
pragma Assert (Last >= First + 2);
pragma Assert (SP (Last - 1) = '%');
pragma Assert (SP (Last) = 's' or else SP (Last) = 'b');
Name_Len := Last - First + 1;
Name_Buffer (1 .. Name_Len) := SP (First .. Last);
Uname := Name_Find;
-- Get the file name
Get_Line;
-- If end of line has been reached, file is truncated
if First > Last then
Report_Truncated;
Empty_Tables;
return;
end if;
Name_Len := Last - First + 1;
Name_Buffer (1 .. Name_Len) := SP (First .. Last);
Fname := Name_Find;
-- Get the path name
Get_Line;
-- If end of line has been reached, file is truncated
if First > Last then
Report_Truncated;
Empty_Tables;
return;
end if;
Name_Len := Last - First + 1;
Name_Buffer (1 .. Name_Len) := SP (First .. Last);
Pname := Name_Find;
-- Check for duplicate entries
if Unit_Hash_Table.Get (Uname) /= No_Entry then
if not Quiet_Output then
Write_Str ("warning: duplicate entry """);
Write_Str (Get_Name_String (Uname));
Write_Str (""" in mapping file """);
Write_Str (File_Name);
Write_Line ("""");
The_Mapping :=
File_Mapping.Table (Unit_Hash_Table.Get (Uname));
Write_Line (Get_Name_String (The_Mapping.Uname));
Write_Line (Get_Name_String (The_Mapping.Fname));
end if;
Empty_Tables;
return;
end if;
if File_Hash_Table.Get (Fname) /= No_Entry then
if not Quiet_Output then
Write_Str ("warning: duplicate entry """);
Write_Str (Get_Name_String (Fname));
Write_Str (""" in mapping file """);
Write_Str (File_Name);
Write_Line ("""");
The_Mapping :=
Path_Mapping.Table (File_Hash_Table.Get (Fname));
Write_Line (Get_Name_String (The_Mapping.Uname));
Write_Line (Get_Name_String (The_Mapping.Fname));
end if;
Empty_Tables;
return;
end if;
-- Add the mappings for this unit name
Add_To_File_Map (Uname, Fname, Pname);
end loop;
end if;
-- Record the length of the two mapping tables
Last_In_Table := File_Mapping.Last;
end Initialize;
----------------------
-- Mapped_File_Name --
----------------------
function Mapped_File_Name (Unit : Unit_Name_Type) return File_Name_Type is
The_Index : constant Int := Unit_Hash_Table.Get (Unit);
begin
if The_Index = No_Entry then
return No_File;
else
return File_Mapping.Table (The_Index).Fname;
end if;
end Mapped_File_Name;
----------------------
-- Mapped_Path_Name --
----------------------
function Mapped_Path_Name (File : File_Name_Type) return File_Name_Type is
Index : Int := No_Entry;
begin
Index := File_Hash_Table.Get (File);
if Index = No_Entry then
return No_File;
else
return Path_Mapping.Table (Index).Fname;
end if;
end Mapped_Path_Name;
-------------------------
-- Update_Mapping_File --
-------------------------
procedure Update_Mapping_File (File_Name : String) is
File : File_Descriptor;
procedure Put_Line (Name : Name_Id);
-- Put Name as a line in the Mapping File
--------------
-- Put_Line --
--------------
procedure Put_Line (Name : Name_Id) is
N_Bytes : Integer;
begin
Get_Name_String (Name);
Name_Len := Name_Len + 1;
Name_Buffer (Name_Len) := ASCII.LF;
N_Bytes := Write (File, Name_Buffer (1)'Address, Name_Len);
if N_Bytes < Name_Len then
Fail ("disk full");
end if;
end Put_Line;
-- Start of Update_Mapping_File
begin
-- Only Update if there are new entries in the mappings
if Last_In_Table < File_Mapping.Last then
-- If the tables have been emptied, recreate the file.
-- Otherwise, append to it.
if Last_In_Table = 0 then
declare
Discard : Boolean;
begin
Delete_File (File_Name, Discard);
end;
File := Create_File (File_Name, Binary);
else
File := Open_Read_Write (Name => File_Name, Fmode => Binary);
end if;
if File /= Invalid_FD then
if Last_In_Table > 0 then
Lseek (File, 0, Seek_End);
end if;
for Unit in Last_In_Table + 1 .. File_Mapping.Last loop
Put_Line (File_Mapping.Table (Unit).Uname);
Put_Line (File_Mapping.Table (Unit).Fname);
Put_Line (Path_Mapping.Table (Unit).Fname);
end loop;
Close (File);
elsif not Quiet_Output then
Write_Str ("warning: could not open mapping file """);
Write_Str (File_Name);
Write_Line (""" for update");
end if;
end if;
end Update_Mapping_File;
end Fmap;
|
