--------------------------------------------------------------------------------
--                                                                            --
-- Copyright (C) 2004, RISC OS Ada Library (RASCAL) developers.               --
--                                                                            --
-- This library is free software; you can redistribute it and/or              --
-- modify it under the terms of the GNU Lesser General Public                 --
-- License as published by the Free Software Foundation; either               --
-- version 2.1 of the License, 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             --
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU           --
-- Lesser General Public License for more details.                            --
--                                                                            --
-- You should have received a copy of the GNU Lesser General Public           --
-- License along with this library; if not, write to the Free Software        --
-- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA    --
--                                                                            --
--------------------------------------------------------------------------------

-- $Author$
-- $Date$
-- $Revision$

with RASCAL.Time;       use RASCAL.Time;
with RASCAL.Memory;     use RASCAL.Memory;
with RASCAL.OS;         use RASCAL.OS;

with Kernel;            use Kernel;
with Interfaces.C;      use Interfaces.C;


package body RASCAL.ToolboxFileInfo is

   -- SWIs
   Toolbox_ObjectMiscOp : constant Interfaces.C.unsigned := 16#44EC6#;

   FileInfo_ClassSWI    : constant := 16#82AC0#;
   FileInfo_PostFilter  : constant := 16#82AC1#;
   FileInfo_PreFilter   : constant := 16#82AC2#;

   -- Reason codes
   FileInfo_GetWindowId : constant := 16#0#;
   FileInfo_SetModified : constant := 16#1#;
   FileInfo_GetModified : constant := 16#2#;
   FileInfo_SetFileType : constant := 16#3#;
   FileInfo_GetFileType : constant := 16#4#;
   FileInfo_SetFileName : constant := 16#5#;
   FileInfo_GetFileName : constant := 16#6#;
   FileInfo_SetFileSize : constant := 16#7#;
   FileInfo_GetFileSize : constant := 16#8#;
   FileInfo_SetDate     : constant := 16#9#;
   FileInfo_GetDate     : constant := 16#A#;
   FileInfo_SetTitle    : constant := 16#B#;
   FileInfo_GetTitle    : constant := 16#C#;

   --

   function Get_Date (FileInfo : Object_ID;
                      Flags    : in System.Unsigned_Types.Unsigned := 0) return Address is

      Register             : aliased Kernel.swi_regs;
      Error                : oserror_access;
      Buffer               : UTC_Time_Type;
   begin
      Register.R(0) := int(Unsigned_to_Int(Flags));
      Register.R(1) := int(FileInfo);
      Register.R(2) := FileInfo_GetDate;
      Register.R(3) := Adr_To_Int(Buffer'Address);
      Error := Kernel.swi(Toolbox_ObjectMiscOp,Register'Access,Register'Access);

      if Error /= null then
         pragma Debug(Report("ToolboxFileInfo.Get_Date: " & To_Ada(Error.ErrMess)));
         OS.Raise_Error(Error);
      end if;
      --      return UTC_Time_Type(Register.R(0));
      return Buffer'Address;
   end Get_Date;

   --

   function Get_FileName (FileInfo : Object_ID;
                          Flags    : in System.Unsigned_Types.Unsigned := 0) return string is

      Register             : aliased Kernel.swi_regs;
      Error                : oserror_access;
      Buffer_Size          : integer;
   begin
      Register.R(0) := int(Unsigned_to_Int(Flags));
      Register.R(1) := int(FileInfo);
      Register.R(2) := FileInfo_GetFileName;
      Register.R(3) := 0;
      Register.R(4) := 0;
      Error := Kernel.swi(Toolbox_ObjectMiscOp,Register'Access,Register'Access);

      if Error /= null then
         pragma Debug(Report("ToolboxFileInfo.Get_FileName:(I) " & To_Ada(Error.ErrMess)));
         OS.Raise_Error(Error);
      end if;

      Buffer_Size := integer(Register.R(4));

      declare
         Buffer : string(1..Buffer_Size);
      begin
         Register.R(0) := int(Unsigned_to_Int(Flags));
         Register.R(1) := int(FileInfo);
         Register.R(2) := FileInfo_GetFileName;
         Register.R(3) := Adr_To_Int(Buffer'Address);
         Register.R(4) := int(Buffer_Size);
         Error := Kernel.swi(Toolbox_ObjectMiscOp,Register'Access,Register'Access);

         if Error /= null then
            pragma Debug(Report("ToolboxFileInfo.Get_FileName:(II) " & To_Ada(Error.ErrMess)));
            OS.Raise_Error(Error);
         end if;
         return MemoryToString(Buffer'Address);
      end;
   end Get_FileName;

   --

   
   function Get_FileSize (FileInfo : Object_ID;
                           Flags    : in System.Unsigned_Types.Unsigned := 0) return integer is

      Register             : aliased Kernel.swi_regs;
      Error                : oserror_access;
   begin
      Register.R(0) := int(Unsigned_to_Int(Flags));
      Register.R(1) := int(FileInfo);
      Register.R(2) := FileInfo_GetFileSize;
      Error := Kernel.swi(Toolbox_ObjectMiscOp,Register'Access,Register'Access);

      if Error /= null then
         pragma Debug(Report("ToolboxFileInfo.Get_FileSize: " & To_Ada(Error.ErrMess)));
         OS.Raise_Error(Error);
      end if;
      return integer(Register.R(0));
   end Get_FileSize;

   --

   
   function Get_FileType (FileInfo : in Object_ID;
                          Flags    : in System.Unsigned_Types.Unsigned := 0) return integer is

      Register             : aliased Kernel.swi_regs;
      Error                : oserror_access;
   begin
      Register.R(0) := int(Unsigned_to_Int(Flags));
      Register.R(1) := int(FileInfo);
      Register.R(2) := FileInfo_GetFileType;
      Error := Kernel.swi(Toolbox_ObjectMiscOp,Register'Access,Register'Access);

      if Error /= null then
         pragma Debug(Report("ToolboxFileInfo.Get_FileType: " & To_Ada(Error.ErrMess)));
         OS.Raise_Error(Error);
      end if;
      return integer(Register.R(0));
   end Get_FileType;

   --

   function Get_Modified (FileInfo : Object_ID;
                          Flags      : in System.Unsigned_Types.Unsigned := 0) return boolean is

      Register : aliased Kernel.swi_regs;
      Error    : oserror_access;
   begin
      Register.R(0) := int(Unsigned_to_Int(Flags));
      Register.R(1) := int(FileInfo);
      Register.R(2) := FileInfo_GetModified;
      Error := Kernel.swi(Toolbox_ObjectMiscOp,Register'Access,Register'Access);

      if Error /= null then
         pragma Debug(Report("ToolboxFileInfo.Get_Modified: " & To_Ada(Error.ErrMess)));
         OS.Raise_Error(Error);
      end if;

      return "And"(1,int_to_unsigned(integer(Register.R(0))))=1;
   end Get_Modified;

   --

   function Get_Title (FileInfo : Object_ID;
                       Flags    : in System.Unsigned_Types.Unsigned := 0) return string is

      Register             : aliased Kernel.swi_regs;
      Error                : oserror_access;
      Buffer_Size          : integer;
   begin
      Register.R(0) := int(Unsigned_to_Int(Flags));
      Register.R(1) := int(FileInfo);
      Register.R(2) := FileInfo_GetTitle;
      Register.R(3) := 0;
      Register.R(4) := 0;
      Error := Kernel.swi(Toolbox_ObjectMiscOp,Register'Access,Register'Access);

      if Error /= null then
         pragma Debug(Report("ToolboxFileInfo.Get_Title(I): " & To_Ada(Error.ErrMess)));
         OS.Raise_Error(Error);
      end if;

      Buffer_Size := integer(Register.R(4));

      declare
         Buffer : string(1..Buffer_Size);
      begin
         Register.R(0) := int(Unsigned_to_Int(Flags));
         Register.R(1) := int(FileInfo);
         Register.R(2) := FileInfo_GetTitle;
         Register.R(3) := Adr_To_Int(Buffer'Address);
         Register.R(4) := int(Buffer_Size);
         Error := Kernel.swi(Toolbox_ObjectMiscOp,Register'Access,Register'Access);

         if Error /= null then
            pragma Debug(Report("ToolboxFileInfo.Get_Title(II): " & To_Ada(Error.ErrMess)));
            OS.Raise_Error(Error);
         end if;
         return MemoryToString(Buffer'Address);
      end;
   end Get_Title;

   --

   function Get_Window_ID (FileInfo : Object_ID;
                           Flags    : in System.Unsigned_Types.Unsigned := 0) return Object_ID is

      Register             : aliased Kernel.swi_regs;
      Error                : oserror_access;
   begin
      Register.R(0) := int(Unsigned_to_Int(Flags));
      Register.R(1) := int(FileInfo);
      Register.R(2) := FileInfo_GetWindowId;
      Error := Kernel.swi(Toolbox_ObjectMiscOp,Register'Access,Register'Access);

      if Error /= null then
         pragma Debug(Report("ToolboxFileInfo.Get_Window_ID: " & To_Ada(Error.ErrMess)));
         OS.Raise_Error(Error);
      end if;
      return Object_ID(Register.R(0));
   end Get_Window_ID;

   --

   procedure Set_Date (FileInfo  : in Object_ID;
                       Date      : in UTC_Time_Type;
                       Flags     : in System.Unsigned_Types.Unsigned := 0) is

      Register             : aliased Kernel.swi_regs;
      Error                : oserror_access;
   begin
      Register.R(0) := int(Unsigned_to_Int(Flags));
      Register.R(1) := int(FileInfo);
      Register.R(2) := FileInfo_SetDate;
      Register.R(3) := Adr_To_Int(Date'Address);
      Error := Kernel.swi(Toolbox_ObjectMiscOp,Register'Access,Register'Access);

      if Error /= null then
         pragma Debug(Report("ToolboxFileInfo.Set_Date: " & To_Ada(Error.ErrMess)));
         OS.Raise_Error(Error);
      end if;
   end Set_Date;

   --

   procedure Set_FileName (FileInfo  : in Object_ID;
                           FileName  : in string;
                           Flags     : in System.Unsigned_Types.Unsigned := 0) is

      Register        : aliased Kernel.swi_regs;
      Error           : oserror_access;
      FileName_0      : string := FileName & Character'Val(0);
   begin
      Register.R(0) := int(Unsigned_to_Int(Flags));
      Register.R(1) := int(FileInfo);
      Register.R(2) := FileInfo_SetFileName;
      Register.R(3) := Adr_To_Int(FileName_0'Address);
      Error := Kernel.swi(Toolbox_ObjectMiscOp,Register'Access,Register'Access);

      if Error /= null then
         pragma Debug(Report("ToolboxFileInfo.Set_FileName: " & To_Ada(Error.ErrMess)));
         OS.Raise_Error(Error);
      end if;
   end Set_FileName;

   --

   procedure Set_FileType (FileInfo : in Object_ID;
                           FileType : in integer;
                           Flags    : in System.Unsigned_Types.Unsigned := 0) is

      Register      : aliased Kernel.swi_regs;
      Error         : oserror_access;
   begin
      Register.R(0) := int(Unsigned_to_Int(Flags));
      Register.R(1) := int(FileInfo);
      Register.R(2) := FileInfo_SetFileType;
      Register.R(3) := int(FileType);
      Error := Kernel.swi(Toolbox_ObjectMiscOp,Register'Access,Register'Access);

      if Error /= null then
         pragma Debug(Report("ToolboxFileInfo.Set_FileType: " & To_Ada(Error.ErrMess)));
         OS.Raise_Error(Error);
      end if;
   end Set_FileType;

   --

   procedure Set_FileSize (FileInfo : in Object_ID;
                           FileSize : in integer;
                           Flags    : in System.Unsigned_Types.Unsigned := 0) is

      Register      : aliased Kernel.swi_regs;
      Error         : oserror_access;
   begin
      Register.R(0) := int(Unsigned_to_Int(Flags));
      Register.R(1) := int(FileInfo);
      Register.R(2) := FileInfo_SetFileSize;
      Register.R(3) := int(FileSize);
      Error := Kernel.swi(Toolbox_ObjectMiscOp,Register'Access,Register'Access);

      if Error /= null then
         pragma Debug(Report("ToolboxFileInfo.Set_FileSize: " & To_Ada(Error.ErrMess)));
         OS.Raise_Error(Error);
      end if;
   end Set_FileSize;

   --

   procedure Set_Modified (FileInfo   : in Object_ID;
                           Modified   : in boolean;
                           Flags      : in System.Unsigned_Types.Unsigned := 0) is

      Register : aliased Kernel.swi_regs;
      Error    : oserror_access;
   begin
      Register.R(0) := int(Unsigned_to_Int(Flags));
      Register.R(1) := int(FileInfo);
      Register.R(2) := FileInfo_SetModified;
      Register.R(3) := boolean'Pos(Modified);
      Error := Kernel.swi(Toolbox_ObjectMiscOp,Register'Access,Register'Access);

      if Error /= null then
         pragma Debug(Report("ToolboxFileInfo.Set_Modified: " & To_Ada(Error.ErrMess)));
         OS.Raise_Error(Error);
      end if;
   end Set_Modified;

   --

   procedure Set_Title (FileInfo  : in Object_ID;
                        Title     : in string;
                        Flags     : in System.Unsigned_Types.Unsigned := 0) is

      Register     : aliased Kernel.swi_regs;
      Error        : oserror_access;
      Title_0      : string := Title & ASCII.NUL;
   begin
      Register.R(0) := int(Unsigned_to_Int(Flags));
      Register.R(1) := int(FileInfo);
      Register.R(2) := FileInfo_SetTitle;
      Register.R(3) := Adr_To_Int(Title_0'Address);
      Error := Kernel.swi(Toolbox_ObjectMiscOp,Register'Access,Register'Access);

      if Error /= null then
         pragma Debug(Report("ToolboxFileInfo.Set_Title: " & To_Ada(Error.ErrMess)));
         OS.Raise_Error(Error);
      end if;
   end Set_Title;

   --
   
end RASCAL.ToolboxFileInfo;
