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-------------------------------------------------------------------------------
-- --
-- GNADE : GNu Ada Database Environment --
-- --
-- Author : Juergen Pfeifer <juergen.pfeifer@gmx.net>
--
-- Copyright (C) 2000-2001 Juergen Pfeifer
-- --
-- GNADE 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. --
-- --
-- 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. --
-- --
-- GNADE is implemented to work with GNAT, the GNU Ada compiler. --
-- --
-------------------------------------------------------------------------------
with System.Address_To_Access_Conversions;
with Ada.Unchecked_Conversion;
with Ada.Unchecked_Deallocation;
package body GNU.DB.SQLCLI.Generic_Attr.Bitmap_Attribute is
function To_String (Object : Attribute_Value_Pair_Bitmap)
return String is
type Str_Pointer is access String;
procedure Append (X : in String);
procedure Free is new Ada.Unchecked_Deallocation (String,
Str_Pointer);
S : Str_Pointer;
F : Boolean := True;
procedure Append (X : in String) is
O : Str_Pointer;
begin
O := S;
S := new String'(O.all & X);
Free (O);
end Append;
pragma Inline (Append);
begin
S := new String'("{");
for I in E'Range loop
if Object.Value (I) then
if F then
Append (E'Image (I));
F := False;
else
Append ("," & E'Image (I));
end if;
end if;
end loop;
Append ("}");
declare Str : constant String := S.all;
begin
Free (S);
return Str;
end;
end To_String;
function GetAttr (Handle : Context;
Attribute : T;
Data : Aux;
MaxLength : SQLSMALLINT := 0;
ErrorCode : access SQLRETURN)
return Attribute_Value_Pair_Bitmap is
package P_SQLUI is new
System.Address_To_Access_Conversions (SQLUINTEGER);
use System;
use P_SQLUI;
function To_E is new Ada.Unchecked_Conversion (SQLUINTEGER,
E_Bitmap);
function H_To_NL (I : SQLUINTEGER) return SQLUINTEGER;
pragma Import ($CALLCONVENTION, H_To_NL, "htonl");
Value : aliased SQLUINTEGER;
Len : Base := Base (MaxLength);
begin
Get (Handle,
Attribute,
To_Integer (To_Address (Object_Pointer'(Value'Access))),
Len,
Data,
ErrorCode);
if Default_Bit_Order = High_Order_First then
Value := H_To_NL (Value);
end if;
return Attribute_Value_Pair_Bitmap'(Attribute => Attribute,
Value => To_E (Value));
end GetAttr;
procedure SetAttr (Handle : in Context;
AV_Pair : in Attribute_Value_Pair_Bitmap;
Data : in Aux;
ErrorCode : out SQLRETURN) is
use System;
function NL_To_H (I : SQLUINTEGER) return SQLUINTEGER;
pragma Import ($CALLCONVENTION, NL_To_H, "nltoh");
function To_UINT is new Ada.Unchecked_Conversion (E_Bitmap,
SQLUINTEGER);
function Cvt is new Ada.Unchecked_Conversion (SQLUINTEGER, SQLPOINTER);
Len : Base := SQL_IS_UINTEGER;
Val : aliased SQLUINTEGER;
begin
Val := To_UINT (AV_Pair.Value);
if Default_Bit_Order = High_Order_First then
Val := NL_To_H (Val);
end if;
Set (Handle, AV_Pair.Attribute,
Cvt (Val),
Len,
Data,
ErrorCode);
end SetAttr;
end GNU.DB.SQLCLI.Generic_Attr.Bitmap_Attribute;
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