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-------------------------------------------------------------------------------
--- --
--- GNAT COMPILER COMPONENTS --
--- --
--- L I B . S O R T --
--- --
--- 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 GNAT.Heap_Sort_G;
-
-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
-
- package Sorting is new GNAT.Heap_Sort_G (Move_Uname, Lt_Uname);
-
- --------------
- -- 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_Unit_Name then
- return False;
-
- elsif Units.Table (T (C2)).Unit_Name = No_Unit_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;
-
- Sorting.Sort (T'Last);
-
- -- 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;