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{
This file is part of the Free Pascal run time library.
Copyright (c) 2014 by Maciej Izak (hnb)
member of the Free Sparta development team (http://freesparta.com)
Copyright(c) 2004-2014 DaThoX
It contains the Free Pascal generics library
See the file COPYING.FPC, included in this distribution,
for details about the copyright.
This program 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.
**********************************************************************}
unit Generics.Helpers;
{$MODE DELPHI}{$H+}
{$MODESWITCH TYPEHELPERS}
{$OVERFLOWCHECKS OFF}
{$RANGECHECKS OFF}
interface
uses
Classes, SysUtils;
type
{ TValueAnsiStringHelper }
TValueAnsiStringHelper = record helper for AnsiString
function ToLower: AnsiString; inline;
end;
{ TValuewideStringHelper }
TValueWideStringHelper = record helper for WideString
function ToLower: WideString; inline;
end;
{ TValueUnicodeStringHelper }
TValueUnicodeStringHelper = record helper for UnicodeString
function ToLower: UnicodeString; inline;
end;
{ TValueShortStringHelper }
TValueShortStringHelper = record helper for ShortString
function ToLower: ShortString; inline;
end;
{ TValueUTF8StringHelper }
TValueUTF8StringHelper = record helper for UTF8String
function ToLower: UTF8String; inline;
end;
{ TValueRawByteStringHelper }
TValueRawByteStringHelper = record helper for RawByteString
function ToLower: RawByteString; inline;
end;
{ TValueUInt32Helper }
TValueUInt32Helper = record helper for UInt32
class function GetSignMask: UInt32; static; inline;
class function GetSizedSignMask(ABits: Byte): UInt32; static; inline;
class function GetBitsLength: Byte; static; inline;
const
SIZED_SIGN_MASK: array[1..32] of UInt32 = (
$80000000, $C0000000, $E0000000, $F0000000, $F8000000, $FC000000, $FE000000, $FF000000,
$FF800000, $FFC00000, $FFE00000, $FFF00000, $FFF80000, $FFFC0000, $FFFE0000, $FFFF0000,
$FFFF8000, $FFFFC000, $FFFFE000, $FFFFF000, $FFFFF800, $FFFFFC00, $FFFFFE00, $FFFFFF00,
$FFFFFF80, $FFFFFFC0, $FFFFFFE0, $FFFFFFF0, $FFFFFFF8, $FFFFFFFC, $FFFFFFFE, $FFFFFFFF);
BITS_LENGTH = 32;
end;
implementation
{ TRawDataStringHelper }
function TValueAnsiStringHelper.ToLower: AnsiString;
begin
Result := LowerCase(Self);
end;
{ TValueWideStringHelper }
function TValueWideStringHelper.ToLower: WideString;
begin
Result := LowerCase(Self);
end;
{ TValueUnicodeStringHelper }
function TValueUnicodeStringHelper.ToLower: UnicodeString;
begin
Result := LowerCase(Self);
end;
{ TValueShortStringHelper }
function TValueShortStringHelper.ToLower: ShortString;
begin
Result := LowerCase(Self);
end;
{ TValueUTF8StringHelper }
function TValueUTF8StringHelper.ToLower: UTF8String;
begin
Result := LowerCase(Self);
end;
{ TValueRawByteStringHelper }
function TValueRawByteStringHelper.ToLower: RawByteString;
begin
Result := LowerCase(Self);
end;
{ TValueUInt32Helper }
class function TValueUInt32Helper.GetSignMask: UInt32;
begin
Result := $80000000;
end;
class function TValueUInt32Helper.GetSizedSignMask(ABits: Byte): UInt32;
begin
Result := SIZED_SIGN_MASK[ABits];
end;
class function TValueUInt32Helper.GetBitsLength: Byte;
begin
Result := BITS_LENGTH;
end;
end.
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