------------------------------------------------------------------------------
--                     XML/Ada - An XML suite for Ada95                     --
--                                                                          --
--                     Copyright (C) 2001-2012, AdaCore                     --
--                                                                          --
-- This library is free software;  you can redistribute it and/or modify it --
-- under terms of the  GNU General Public License  as published by the Free --
-- Software  Foundation;  either version 3,  or (at your  option) any later --
-- version. This library is distributed in the hope that it will be useful, --
-- but WITHOUT ANY WARRANTY;  without even the implied warranty of MERCHAN- --
-- TABILITY or FITNESS FOR A PARTICULAR PURPOSE.                            --
--                                                                          --
--                                                                          --
--                                                                          --
--                                                                          --
--                                                                          --
-- 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/>.                                          --
--                                                                          --
------------------------------------------------------------------------------

with Ada.Unchecked_Deallocation;
with GNAT.Directory_Operations; use GNAT.Directory_Operations;
with Sax.Symbols;               use Sax.Symbols;

package body Sax.Locators is
   ---------------------
   -- Get_Line_Number --
   ---------------------

   function Get_Line_Number (Loc : locator) return Natural is
   begin
      return Loc.Line;
   end Get_Line_Number;

   -----------------------
   -- Get_Column_Number --
   -----------------------

   function Get_Column_Number (Loc : locator) return Natural is
   begin
      return Loc.Column;
   end Get_Column_Number;

   -------------------
   -- Get_System_Id --
   -------------------

   function Get_System_Id (Loc : locator) return symbol is
   begin
      return Loc.System_Id;
   end Get_System_Id;

   -------------------
   -- Get_Public_Id --
   -------------------

   function Get_Public_Id (Loc : locator) return symbol is
   begin
      return Loc.Public_Id;
   end Get_Public_Id;

   -----------------------
   -- Set_Column_Number --
   -----------------------

   procedure Set_Column_Number (Loc : in out locator; Column : Natural := 0) is
   begin
      Loc.Column := Column;
   end Set_Column_Number;

   ----------------------------
   -- Increase_Column_Number --
   ----------------------------

   procedure Increase_Column_Number
     (Loc : in out locator;
      Inc :        Natural := 1)
   is
   begin
      Loc.Column := Loc.Column + Inc;
   end Increase_Column_Number;

   --------------------------
   -- Increase_Line_Number --
   --------------------------

   procedure Increase_Line_Number (Loc : in out locator; Inc : Natural := 1) is
   begin
      Loc.Line := Loc.Line + Inc;
   end Increase_Line_Number;

   ---------------------
   -- Set_Line_Number --
   ---------------------

   procedure Set_Line_Number (Loc : in out locator; Line : Natural := 0) is
   begin
      Loc.Line := Line;
   end Set_Line_Number;

   ------------------
   -- Get_Location --
   ------------------

   function Get_Location (Loc : locator) return location is
   begin
      if Loc = null then
         return No_Location;
      else
         return Loc.all;
      end if;
   end Get_Location;

   ------------------
   -- Set_Location --
   ------------------

   procedure Set_Location (Loc : in out locator; To : location) is
   begin
      Loc.all := To;
   end Set_Location;

   -------------------
   -- Set_Public_Id --
   -------------------

   procedure Set_Public_Id (Loc : in out locator; Id : symbol) is
   begin
      Loc.Public_Id := Id;
   end Set_Public_Id;

   -------------------
   -- Set_System_Id --
   -------------------

   procedure Set_System_Id (Loc : in out locator; Id : symbol) is
   begin
      Loc.System_Id := Id;
   end Set_System_Id;

   ---------------
   -- To_String --
   ---------------

   function To_String
     (Loc          : locator;
      Use_Basename : Boolean := False) return String
   is
   begin
      if Loc = null then
         return "";
      else
         return To_String (Loc.all, Use_Basename);
      end if;
   end To_String;

   ---------------
   -- To_String --
   ---------------

   function To_String
     (Loc          : location;
      Use_Basename : Boolean := False) return String
   is
      C      : constant Natural := Loc.Column;
      Line   : constant String  := Natural'image (Loc.Line);
      Col    : constant String  := Natural'image (C);
      Public : constant symbol  := Loc.Public_Id;
   begin
      if Public = No_Symbol then
         return "";
      elsif C /= 0 then
         if Use_Basename then
            return
              (Base_Name (Get (Public).all) &
               ':' &
               Line (Line'first + 1 .. Line'last) &
               ':' &
               Col (Col'first + 1 .. Col'last));
         else
            return
              (Get (Public).all &
               ':' &
               Line (Line'first + 1 .. Line'last) &
               ':' &
               Col (Col'first + 1 .. Col'last));
         end if;
      else
         if Use_Basename then
            return
              (Base_Name (Get (Public).all) &
               ':' &
               Line (Line'first + 1 .. Line'last));
         else
            return
              (Get (Public).all & ':' & Line (Line'first + 1 .. Line'last));
         end if;
      end if;
   end To_String;

   ----------
   -- Free --
   ----------

   procedure Free (Loc : in out locator) is
      procedure Unchecked_Free is new Ada.Unchecked_Deallocation
        (location,
         locator);
   begin
      Unchecked_Free (Loc);
   end Free;

   ------------
   -- Create --
   ------------

   function Create return locator is
   begin
      return new location;
   end Create;

end Sax.Locators;