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-------------------------------------------------------------------------------
--- --
--- GNAT COMPILER COMPONENTS --
--- --
--- L I B . S O R T --
--- --
--- B o d y --
--- --
--- Copyright (C) 1992-2005, 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, 51 Franklin Street, Fifth Floor, --
--- Boston, MA 02110-1301, 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. --
--- Extensive contributions were provided by Ada Core Technologies Inc. --
--- --
-------------------------------------------------------------------------------
-
-with GNAT.Heap_Sort_A; use GNAT.Heap_Sort_A;
-
-separate (Lib)
-procedure Sort (Tbl : in out Unit_Ref_Table) is
-
- T : array (0 .. Integer (Tbl'Last - Tbl'First + 1)) of Unit_Number_Type;
- -- Actual sort is done on this copy of the array with 0's origin
- -- subscripts. Location 0 is used as a temporary by the sorting algorithm.
- -- Also the addressing of the table is more efficient with 0's origin,
- -- even though we have to copy Tbl back and forth.
-
- function Lt_Uname (C1, C2 : Natural) return Boolean;
- -- Comparison routine for comparing Unames. Needed by the sorting routine
-
- procedure Move_Uname (From : Natural; To : Natural);
- -- Move routine needed by the sorting routine below
-
- --------------
- -- Lt_Uname --
- --------------
-
- function Lt_Uname (C1, C2 : Natural) return Boolean is
- begin
- -- Preprocessing data and definition files are not sorted, they are
- -- at the bottom of the list. They are recognized because they are
- -- the only ones without a Unit_Name.
-
- if Units.Table (T (C1)).Unit_Name = No_Name then
- return False;
-
- elsif Units.Table (T (C2)).Unit_Name = No_Name then
- return True;
-
- else
- return
- Uname_Lt
- (Units.Table (T (C1)).Unit_Name, Units.Table (T (C2)).Unit_Name);
- end if;
- end Lt_Uname;
-
- ----------------
- -- Move_Uname --
- ----------------
-
- procedure Move_Uname (From : Natural; To : Natural) is
- begin
- T (To) := T (From);
- end Move_Uname;
-
--- Start of processing for Sort
-
-begin
- if T'Last > 0 then
- for I in 1 .. T'Last loop
- T (I) := Tbl (Int (I) - 1 + Tbl'First);
- end loop;
-
- Sort (T'Last,
- Move_Uname'Unrestricted_Access, Lt_Uname'Unrestricted_Access);
-
- -- Sort is complete, copy result back into place
-
- for I in 1 .. T'Last loop
- Tbl (Int (I) - 1 + Tbl'First) := T (I);
- end loop;
- end if;
-end Sort;