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StdFuncs.pas
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{***************************************************************}
{ FIBPlus - component library for direct access to Firebird and }
{ InterBase databases }
{ }
{ FIBPlus is based in part on the product }
{ Free IB Components, written by Gregory H. Deatz for }
{ Hoagland, Longo, Moran, Dunst & Doukas Company. }
{ mailto:[email protected] }
{ }
{ Copyright (c) 1998-2007 Devrace Ltd. }
{ Written by Serge Buzadzhy ([email protected]) }
{ }
{ ------------------------------------------------------------- }
{ FIBPlus home page: http://www.fibplus.com/ }
{ FIBPlus support : http://www.devrace.com/support/ }
{ ------------------------------------------------------------- }
{ }
{ Please see the file License.txt for full license information }
{***************************************************************}
(*
* StdFuncs -
* A file chock full of functions that should exist in Delphi, but
* dont, like "Max", "GetTempFile", "Soundex", etc...
*)
unit StdFuncs;
{$I FIBPlus.inc}
interface
uses
Classes, SysUtils,DB,FIBSafeTimer
{$IFDEF WINDOWS},Windows {$ENDIF}
{$IFDEF D6+},FMTBcd, Variants{$ENDIF};
type
EParserError = class(Exception);
TCharSet = set of AnsiChar;
TDynArray = array of variant;
PDynArray=^TDynArray;
TFIBTimer = TFIBCustomTimer;
function ConvertFromBase(sNum: String; iBase: Integer; cDigits: String): Integer;
function ConvertToBase(iNum, iBase: Integer; cDigits: String): String;
function Max(n1, n2: Integer): Integer;
function MaxD(n1, n2: Double): Double;
function Min(n1, n2: Integer): Integer;{$IFDEF D2005+} inline;{$ENDIF}
function MinD(n1, n2: Double): Double;
function Signum(Arg:Integer) :Integer; {$IFDEF D2005+} inline;{$ENDIF}
function RandomString(iLength: Integer): String;
//function RandomInteger(iLow, iHigh: Integer): Integer;
function Soundex(st: String): String;
function StripString(const st: String; const CharsToStrip: String): String;
function ClosestWeekday(const d: TDateTime): TDateTime;
function Year(d: TDateTime): Integer;
function Month(d: TDateTime): Integer;
function DayOfYear(d: TDateTime): Integer;
function DayOfMonth(d: TDateTime): Integer;
procedure WeekOfYear(d: TDateTime; var Year, Week: Integer);
function Degree10(Degree:integer):Extended;{$IFDEF D2005+} inline;{$ENDIF}
function ExtPrecision(Value:Extended) :integer;{$IFDEF D2005+} inline;{$ENDIF}
function RoundExtend(Value: Extended;Decimals:integer): Extended;
// Comp type stuff
function Int64WithScaleToStr(Value: Int64;Scale:integer;DSep:Char): string; overload;
function ExtendedToBCD(const Value:Extended;NeedScale:integer):TBCD;
//end Comp type stuff
function Int64ToBCD(Value: Int64;Scale:integer; var BCD: TBcd ): Boolean; // {$IFDEF D2005+} inline;{$ENDIF}
function BCDToExtended(BCD: TBcd; var Value: Extended): Boolean;
function BCDToCompWithScale(BCD: TBcd; var Value: Int64;var Scale:byte): Boolean;
function BCDToInt64WithScale(BCD: TBcd; var Value: Int64;var Scale:byte): Boolean;
{$IFNDEF D6+}
function BCDToStr(BCD: TBcd): String;
{$ENDIF}
function BCDToSQLStr(BCD: TBcd): String;
function CompareBCD(const BCD1,BCD2: TBcd): integer;{$IFDEF D2005+} inline;{$ENDIF}
{$IFDEF D6+}
function fFormatBcd(const Format: string; Bcd: TBcd): string;
function FormatNumericString(const Format,Source: string; OneSectionFormat:boolean=False ): string;
{$ENDIF}
function TimeStamp(const aDate,aTime:integer):TTimeStamp;
function CmpFullName(cmp:TComponent):string;
function CmpInLoadedState(Cmp:TComponent):boolean; {$IFDEF D2005+} inline;{$ENDIF}
procedure FullClearStrings(aStrings:TStrings);
function HookTimeStampToMSecs(const TimeStamp:TTimeStamp): Int64;
function HookTimeStampToDateTime(const TimeStamp: TTimeStamp): TDateTime;
function IBStrToTime(const Str:string):TDateTime;
function IntDateToDateTime(aDate:integer):TDateTime;
//DB rtns
function FieldOldValAsString(Field:TField;SQLFormat:boolean):string;
function BCDFieldAsSQLString(Field:TField;OldVal:boolean):variant;
function BCDFieldAsString(Field:TField;OldVal:boolean):variant;
function GetBCDFieldData(Field:TField;OldVal:boolean; var BCD:TBcd):boolean;
function GetBit(InByte:Byte; Index:byte):Boolean;{$IFDEF D2005+} inline;{$ENDIF}
function SetBit(InByte:Byte; Index:byte; value :Boolean):Byte;
function HexStr2Int(const S: String): Integer;
function HexStr2IntStr(const S: String): string;
{$IFNDEF D6+}
type
PBoolean = ^Boolean;
function CreateGUID(out Guid: TGUID): HResult;
//function IsEqualGUID(const guid1, guid2: TGUID): Boolean; stdcall; {$EXTERNALSYM IsEqualGUID}
function Utf8ToUnicode(Dest: PWideChar; MaxDestChars: Cardinal; Source: PChar; SourceBytes: Cardinal): Cardinal;
function DirectoryExists(const Name: string): Boolean;
function ForceDirectories(Dir: string): Boolean;
{$ENDIF}
procedure InitFPU;
procedure StreamToVariant(Stream:TMemoryStream; var Value : Variant);
procedure StreamToVariantArray(Stream:TMemoryStream; var Value : Variant);
function VariantToStream(Value : Variant;Stream:TStream): integer; {Length of Blob}
function StringIsDateTimeDefValue(const s:string):boolean; {$IFDEF D2005+} inline;{$ENDIF}
{$IFNDEF D6+}
// Cut from system.pas Delphi 6
function Utf8Encode(const WS: WideString): String;
function Utf8Decode(const S: String): WideString;
{$ENDIF}
{$IFDEF WINDOWS}
function ConvertFromCodePage( const Source : string; FromCodePage:LongWord) : WideString;
function ConvertToCodePage(const Source : WideString; ToCodePage : LongWord) : string;
{$ENDIF}
var
TempPath: PAnsiChar;
TempPathLength: Integer;
const
E10:array [-18..18] of Double =
( 1E-18,1E-17, 1E-16, 1E-15, 1E-14, 1E-13, 1E-12, 1E-11,
1E-10, 1E-9, 1E-8, 1E-7, 1E-6, 1E-5, 1E-4, 1E-3,1E-2, 1E-1,
1,
1E1, 1E2, 1E3, 1E4, 1E5, 1E6, 1E7, 1E8,1E9, 1E10,
1E11, 1E12, 1E13, 1E14, 1E15, 1E16, 1E17, 1E18
);
IE10:array [0..18] of int64 =
(
1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 100000000,1000000000,
10000000000,100000000000,1000000000000,10000000000000,100000000000000,
1000000000000000,10000000000000000,100000000000000000,1000000000000000000
);
const
AppPathTemplate='{APP_PATH}';
implementation
uses FIBConsts,StrUtil;
{$IFDEF WINDOWS}
function ConvertToCodePage(const Source : WideString;
ToCodePage : LongWord) : string;
var
L :integer;
begin
L := Length(Source);
SetLength(Result,L);
if
{$IFDEF D2007+}
WideCharToMultiByte(ToCodePage, 0, PWideChar(Source), L, PAnsiChar(AnsiString(Result)), L, nil, nil)=0
{$ELSE}
WideCharToMultiByte(ToCodePage, 0, PWideChar(Source), L, PChar(Result), L, nil, nil)=0
{$ENDIF}
then
Result:=Source
end;
function ConvertFromCodePage(const Source : string; FromCodePage:LongWord) : WideString;
var
L :integer;
begin
L := Length(Source);
SetLength(Result,L);
if
{$IFDEF D2007+}
MultiByteToWideChar(FromCodePage, 0, PAnsiChar(AnsiString(Source)), L, PWideChar(Result), L)=0
{$ELSE}
MultiByteToWideChar(FromCodePage, 0, PChar(Source), L, PWideChar(Result), L)=0
{$ENDIF}
then
Result :=Source
end;
{$ENDIF}
{$IFNDEF D6+}
// Cut from system.pas Delphi 6
function UnicodeToUtf8(Dest: PChar; MaxDestBytes: Cardinal; Source: PWideChar; SourceChars: Cardinal): Cardinal;
var
i, count: Cardinal;
c: Cardinal;
begin
Result := 0;
if Source = nil then Exit;
count := 0;
i := 0;
if Dest <> nil then
begin
while (i < SourceChars) and (count < MaxDestBytes) do
begin
c := Cardinal(Source[i]);
Inc(i);
if c <= $7F then
begin
Dest[count] := Char(c);
Inc(count);
end
else if c > $7FF then
begin
if count + 3 > MaxDestBytes then
break;
Dest[count] := Char($E0 or (c shr 12));
Dest[count+1] := Char($80 or ((c shr 6) and $3F));
Dest[count+2] := Char($80 or (c and $3F));
Inc(count,3);
end
else // $7F < Source[i] <= $7FF
begin
if count + 2 > MaxDestBytes then
break;
Dest[count] := Char($C0 or (c shr 6));
Dest[count+1] := Char($80 or (c and $3F));
Inc(count,2);
end;
end;
if count >= MaxDestBytes then count := MaxDestBytes-1;
Dest[count] := #0;
end
else
begin
while i < SourceChars do
begin
c := Integer(Source[i]);
Inc(i);
if c > $7F then
begin
if c > $7FF then
Inc(count);
Inc(count);
end;
Inc(count);
end;
end;
Result := count+1; // convert zero based index to byte count
end;
function Utf8Encode(const WS: WideString): String;
var
L: Integer;
Temp: String;
begin
Result := '';
if WS = '' then Exit;
SetLength(Temp, Length(WS) * 3); // SetLength includes space for null terminator
L := UnicodeToUtf8(PChar(Temp), Length(Temp)+1, PWideChar(WS), Length(WS));
if L > 0 then
SetLength(Temp, L-1)
else
Temp := '';
Result := Temp;
end;
function Utf8ToUnicode(Dest: PWideChar; MaxDestChars: Cardinal; Source: PChar; SourceBytes: Cardinal): Cardinal;
var
i, count: Cardinal;
c: Byte;
wc: Cardinal;
begin
if Source = nil then
begin
Result := 0;
Exit;
end;
Result := Cardinal(-1);
count := 0;
i := 0;
if Dest <> nil then
begin
while (i < SourceBytes) and (count < MaxDestChars) do
begin
wc := Cardinal(Source[i]);
Inc(i);
if (wc and $80) <> 0 then
begin
wc := wc and $3F;
if i > SourceBytes then Exit; // incomplete multibyte char
if (wc and $20) <> 0 then
begin
c := Byte(Source[i]);
Inc(i);
if (c and $C0) <> $80 then Exit; // malformed trail byte or out of range char
if i > SourceBytes then Exit; // incomplete multibyte char
wc := (wc shl 6) or (c and $3F);
end;
c := Byte(Source[i]);
Inc(i);
if (c and $C0) <> $80 then Exit; // malformed trail byte
Dest[count] := WideChar((wc shl 6) or (c and $3F));
end
else
Dest[count] := WideChar(wc);
Inc(count);
end;
if count >= MaxDestChars then count := MaxDestChars-1;
Dest[count] := #0;
end
else
begin
while (i <= SourceBytes) do
begin
c := Byte(Source[i]);
Inc(i);
if (c and $80) <> 0 then
begin
if (c and $F0) = $F0 then Exit; // too many bytes for UCS2
if (c and $40) = 0 then Exit; // malformed lead byte
if i > SourceBytes then Exit; // incomplete multibyte char
if (Byte(Source[i]) and $C0) <> $80 then Exit; // malformed trail byte
Inc(i);
if i > SourceBytes then Exit; // incomplete multibyte char
if ((c and $20) <> 0) and ((Byte(Source[i]) and $C0) <> $80) then Exit; // malformed trail byte
Inc(i);
end;
Inc(count);
end;
end;
Result := count+1;
end;
function Utf8Decode(const S: String): WideString;
var
L: Integer;
Temp: WideString;
begin
Result := '';
if S = '' then Exit;
SetLength(Temp, Length(S));
L := Utf8ToUnicode(PWideChar(Temp), Length(Temp)+1, PChar(S), Length(S));
if L > 0 then
SetLength(Temp, L-1)
else
Temp := '';
Result := Temp;
end;
{$ENDIF}
procedure StreamToVariantArray(Stream:TMemoryStream; var Value : Variant);
var
i : integer;
begin
for i := 0 to Stream.Size - 1 do
PByte(LongInt(TVarData(Value).VArray^.Data)+i)^ := PByte(LongInt(Stream.Memory)+i)^ ;
end;
procedure StreamToVariant(Stream:TMemoryStream; var Value : Variant);
var
i : integer;
{$IFDEF D6+}
vt :TVarType;
{$ELSE}
vt :Integer;
{$ENDIF}
begin
VarClear(Value);
if Stream.Size > 0 then
begin
Stream.Position:=0;
vt:=varByte;
Value := VarArrayCreate([0, Stream.Size-1],vt);
for i := 0 to Stream.Size - 1 do
PByte(LongInt(TVarData(Value).VArray^.Data)+i)^ := PByte(LongInt(Stream.Memory)+i)^ ;
end;
end;
function VariantToStream(Value : Variant;Stream:TStream): integer; {Length of Stream}
var
B : TVarArrayBound;
BufSize: Integer;
begin
Result := 0;
if not VarIsArray(Value) then
Exit;
if not Assigned(Stream) then
Exit;
if TVarData(Value).VArray <> nil then
begin
B := TVarData(Value).VArray^.Bounds[0];
if B.ElementCount > 0 then
begin
BufSize:=B.ElementCount*TVarData(Value).VArray^.ElementSize;
Stream.Size:=BufSize;
Stream.Position:=0;
Stream.Write(TVarData(Value).VArray^.Data^, BufSize );
Result := Stream.Size;
end;
end;
end;
function StringIsDateTimeDefValue(const s:string):boolean;
begin
Result := False;
if Length(s) > 0 then
case s[1] of
'C': Result:=(s='CURRENT_TIME') or (s='CURRENT_TIMESTAMP') or (s='CURRENT_DATE');
'N': Result:=(s='NULL') or (s='NOW');
'T': Result:=(s='TODAY') or (s='TOMORROW');
'Y': Result:=(s='YESTERDAY');
'L': Result:=(s='LOCALTIME') or (s='LOCALTIMESTAMP')
end;
end;
{$IFNDEF D6+}
resourcestring
SCannotCreateDir = 'Unable to create directory';
{$EXTERNALSYM CoCreateGuid}
function CoCreateGuid(out guid: TGUID): HResult; stdcall; external 'ole32.dll' name 'CoCreateGuid';
function CreateGUID(out Guid: TGUID): HResult;
begin
Result := CoCreateGuid(Guid);
end;
{$ENDIF}
type THackDS=class(TDataSet);
function FieldOldValAsString(Field:TField;SQLFormat:boolean):string;
var
OldState:TDataSetState;
begin
OldState:=Field.DataSet.State;
try
THackDS(Field.DataSet).SetTempState(dsOldValue);
Result:=Field.AsString;
finally
THackDS(Field.DataSet).RestoreState(OldState);
end;
{$IFDEF D_XE3}with FormatSettings do{$ENDIF}
if SQLFormat and (DecimalSeparator<>'.') then
ReplaceStr(Result,DecimalSeparator,'.')
end;
function GetBCDFieldData(Field:TField;OldVal:boolean; var BCD:TBcd):boolean;
var
OldState:TDataSetState;
begin
OldState:=Field.DataSet.State;
with THackDS(Field.DataSet) do
try
if OldVal and (OldState<>dsOldValue) then
SetTempState(dsOldValue);
Result:=GetFieldData(Field,@Bcd);
finally
if OldVal and (OldState<>dsOldValue) then
RestoreState(OldState);
end;
end;
function InternalBCDFieldAsString(Field:TField;OldVal,SQLFormat:boolean):variant;
var
Bcd :TBcd;
begin
if GetBCDFieldData(Field,OldVal,Bcd) then
begin
if SQLFormat then
Result:=BCDToSQLStr(BCD)
else
Result:=BCDToStr(BCD);
end
else
begin
Result:=UnAssigned;
end;
end;
function BCDFieldAsSQLString(Field:TField;OldVal:boolean):variant;
begin
Result:= InternalBCDFieldAsString(Field,OldVal,true)
end;
function BCDFieldAsString(Field:TField;OldVal:boolean):variant;
begin
Result:= InternalBCDFieldAsString(Field,OldVal,false)
end;
//
function RoundExtend(Value: Extended;Decimals:integer): Extended;
begin
Result:=
System.Int(Value)+Round(Frac(Value)*E10[Decimals])/E10[Decimals];
end;
function TimeStamp(const aDate,aTime:integer):TTimeStamp;
begin
with Result do
begin
Time:=aTime;
Date:=aDate;
end;
end;
function HookTimeStampToMSecs(const TimeStamp:TTimeStamp): Int64;
var t:TTimeStamp;
c:Comp;
begin
if TimeStamp.Date=0 then
begin
t.Date:=1;
t.Time:=TimeStamp.Time;
c:=TimeStampToMSecs(t)-86400000;
end
else
c:=TimeStampToMSecs(TimeStamp);
Result:=PInt64(@c)^
end;
function HookTimeStampToDateTime(const TimeStamp: TTimeStamp): TDateTime;
var
t:TTimeStamp;
begin
if TimeStamp.Date=0 then
begin
t.Date:=1;
t.Time:=TimeStamp.Time;
Result:=TimeStampToDateTime(t)-1;
end
else
Result:=TimeStampToDateTime(TimeStamp)
end;
function IBStrToTime(const Str:string):TDateTime;
var
t:TTimeStamp;
begin
Result:=StrToTime(Str);
t:=DateTimeToTimeStamp(Result);
t.Date:=0;
Result:=HookTimeStampToDateTime(t);
end;
function IntDateToDateTime(aDate:integer):TDateTime;
var
t:TTimeStamp;
begin
t.Date:=aDate;
t.Time:=0;
Result:=HookTimeStampToDateTime(t);
end;
function CmpFullName(cmp:TComponent):string;
begin
result:='';
while cmp<>nil do
with cmp do
begin
if Name<>'' then
if Result='' then
result:=Name
else
result:=Name+'.'+Result;
cmp:=Owner;
end;
end;
function CmpInLoadedState(Cmp:TComponent):boolean;
var tmpCmp :TComponent;
begin
tmpCmp :=Cmp;
while ((tmpCmp<>nil) and not (csLoading in tmpCmp.ComponentState)) do
begin
tmpCmp:=tmpCmp.Owner;
end;
Result:=tmpCmp<>nil;
end;
procedure FullClearStrings(aStrings:TStrings);
var
j: Integer;
begin
with aStrings do
for j := 0 to Pred(aStrings.Count) do
begin
if Objects[j]<>nil then Objects[j].Free;
end;
aStrings.Clear;
end;
function Degree10(Degree:integer):Extended;
begin
Result:=E10[Degree]
end;
function ExtPrecision(Value:Extended) :integer;
var
L, H, I: Integer;
c:comp;
a:comp;
begin
L := 0;
H := 18;
a := Abs(Int(Value));
while L <= H do
begin
I := (L + H) shr 1;
C := E10[I]-a;
if C < 0 then
L := I + 1
else
begin
H := I - 1;
if C = 0 then
begin
L := I+1;
Break
end;
end;
end;
Result:=L
end;
// Comp type stuff
function ExtendedToBCD(const Value:Extended;NeedScale:integer):TBCD;
var
// Pr:Integer;
c:Comp;
begin
// Pr:=ExtPrecision(Value);
c:=Value*E10[NeedScale];
Int64ToBCD(PInt64(@C)^,NeedScale,Result);
end;
procedure PutTwoBcdDigits(const Nibble1, Nibble2: Byte; var Bcd: TBcd; Digit: Integer);
var
b: Byte;
begin
b := Nibble1 SHL 4;
b := b OR (Nibble2 AND 15);
Bcd.Fraction[Digit div 2] := b;
end;
{$IFDEF D_XE2}
//CUT FROM Delphi XE
function CurrToBCD(const Curr: Currency; var BCD: TBcd; Precision: Integer = 32;
Decimals: Integer = 4): Boolean;
var
Temp: Currency;
BcdIndex, StrIndex, StartPos, Digits: Integer;
B1, B2, DotPos: Byte;
BcdStr: string;
Dot: Char;
function GetNextByte(): Byte;
begin
Result := 0;
if BcdIndex < StartPos then
Exit;
if (StrIndex <= Digits) and (BcdStr[StrIndex] = Dot) then
Inc(StrIndex);
if StrIndex <= Digits then
begin
Result := Byte(BcdStr[StrIndex]) - 48;
Inc(StrIndex);
end;
end;
begin
Dot := FormatSettings.DecimalSeparator;
Bcd.Precision := Precision;
Bcd.SignSpecialPlaces := Decimals;
for BcdIndex := 0 to 31 do
Bcd.Fraction[BcdIndex] := 0;
if Curr = 0 then
begin
Result := True;
Exit;
end;
if Curr < 0 then
Temp := -Curr
else
Temp := Curr;
BcdStr := CurrToStr(Temp);
Digits := Length(BcdStr);
DotPos := Pos(Dot, BcdStr);
if DotPos > 0 then
StartPos := Precision - ((DotPos - 1) + Decimals)
else
StartPos := Precision - (Digits + Decimals);
StrIndex := 1;
BcdIndex := 0;
while BcdIndex < Precision do
begin
B1 := GetNextByte();
Inc(BcdIndex);
B2 := GetNextByte();
PutTwoBcdDigits(B1, B2, Bcd, BcdIndex-1);
Inc(BcdIndex);
end;
if Curr < 0 then
Bcd.SignSpecialPlaces := (Bcd.SignSpecialPlaces and 63) or (1 shl 7);
Result := True;
end;
function GetBcdDigit(const Bcd: TBcd; Digit: Integer): Byte;
begin
if Digit mod 2 = 0 then
Result := Byte((Bcd.Fraction[Digit div 2]) SHR 4)
else
Result := Byte(Byte((Bcd.Fraction[Digit div 2]) AND 15));
end;
const
DValue: array[-10..20] of Currency = (0, 0, 0, 0, 0, 0, 0,
0.0001, 0.001, 0.01, 0.1, 1,
10,
100,
1000,
10000,
100000,
1000000,
10000000,
100000000,
1000000000,
10000000000,
100000000000,
1000000000000,
10000000000000,
100000000000000,
0, 0, 0, 0, 0);
{ Currency Value of a Byte for a specific digit column }
function PutCurrencyDigit(Value: Byte; Digit: Integer): Currency;
begin
Result := DValue[Digit] * Value;
end;
function BCDToCurr(const BCD: TBcd; var Curr: Currency): Boolean;
var
Scale, I: Integer;
Negative: Boolean;
b: Byte;
begin
Curr := 0;
Negative := (Bcd.SignSpecialPlaces and (1 shl 7)) <> 0;
Scale := (Bcd.SignSpecialPlaces and 63);
for I := 0 to Bcd.Precision -1 do
begin
b := GetBcdDigit(Bcd, I);
if b <> 0 then
Curr := Curr + PutCurrencyDigit(b, Bcd.Precision - (Scale + I));
end;
if Scale > 4 then
begin { 0.12345 = 0.1234, but 0.123450000001 is rounded up to 0.1235 }
b := GetBcdDigit(Bcd, 4 + (Bcd.Precision - Scale));
if b >= 5 then
if b > 5 then
Curr := Curr + 0.0001
else
for I := 5 + (Bcd.Precision - Scale) to Bcd.Precision -1 do
if GetBcdDigit(Bcd, I) <> 0 then
begin
Curr := Curr + 0.0001;
break;
end;
end;
if Negative then
Curr := -Curr;
Result := True;
end;
{$ENDIF}
function Int64ToBCD(Value: Int64;Scale:integer; var BCD: TBcd ): Boolean;
var
c:Currency;
begin
c:=Value/1E4;
Result:= CurrToBCD(c,BCD);
with BCD do
begin
if Value<0 then
SignSpecialPlaces:=128
else
SignSpecialPlaces:=0;
SignSpecialPlaces :=Scale+SignSpecialPlaces;
end;
end;
function BCDToCompWithScale(BCD: TBcd; var Value: Int64;var Scale:byte): Boolean;
begin
Result:=BCDToInt64WithScale(BCD, Value,Scale)
end;
function BCDToInt64WithScale(BCD: TBcd; var Value: Int64;var Scale:byte): Boolean;
var Sign:integer;
c:Currency;
begin
with BCD do
begin
if Precision=0 then
begin
Result:=true;
Value:=0;
Exit;
end;
if SignSpecialPlaces>=128 then
begin
Sign:=-1;
Scale:=SignSpecialPlaces-128;
end
else
begin
Sign :=1 ;
Scale:=SignSpecialPlaces;
end;
if Scale>=64 then
begin
// null
Result:=true;
Value:=0;
Exit;
end;
SignSpecialPlaces:=4;
end;
Result:=BCDToCurr(BCD,C);
if Result then
Value :=Sign*PInt64(@C)^;
end;
function BCDToSQLStr(BCD: TBcd): String;
var
pd:integer;
begin
Result:=BcdToStr(BCD);
{$IFDEF D_XE3}with FormatSettings do{$ENDIF}
if DecimalSeparator<>'.' then
begin
pd:=Pos(DecimalSeparator,Result);
if pd>0 then
Result[pd]:='.';
end;
end;
const
ZeroStr='000000000000000000';
{$IFDEF D6+}
{$IFNDEF D2005+}
function RoundAt(const Value: string; Position: SmallInt): string;
Procedure RoundChar(const PrevChar: SmallInt; var Carry: Boolean);
begin
if Result[PrevChar] in ['0' .. '9'] then
begin
if Result[PrevChar] = '9' then
begin
Result[PrevChar] := '0';
Carry := True;
end else
begin
Result[PrevChar] := Char(Byte(Result[PrevChar]) + 1);
Carry := False;
end;
end;
end;
var
C, Dot: Char;
PrevChar, I, DecPos, DecDigits: SmallInt;
Carry: Boolean;
Neg: string;
begin
Dot := DecimalSeparator;
if Value[1] = '-' then
begin
Result := FastCopy(Value, 2, MaxInt);
Neg := '-';
end else
begin
Result := Value;
Neg := '';
end;
DecPos := Pos(Dot, Result);
if DecPos > 0 then
DecDigits := Length(Result) - DecPos
else
DecDigits := 0;
if (DecPos = 0) or (DecDigits <= Position) then
{ nothing to round }
begin
Result := Value;
Exit;
end;
if Result[DecPos + Position + 1] < '5' then
begin
{ no possible rounding required }
if Position = 0 then
Result := Neg + Copy(Result, 1, DecPos + Position -1)
else
Result := Neg + Copy(Result, 1, DecPos + Position);
end else
begin
Carry := False;
PrevChar := 1;
for I := DecPos + DecDigits downto (DecPos + 1 + Position) do
begin
C := Result[I];
PrevChar := I-1;
if Result[PrevChar] = Dot then
begin
Dec(PrevChar);
Dec(Position);
end;
if (Byte(C) >= 53) or Carry then { if '5' or greater }
RoundChar(PrevChar, Carry);
end;
while Carry do
begin
if PrevChar >= DecPos then
Dec(Position);
Dec(PrevChar);
if PrevChar = 0 then
break;
if Result[PrevChar] <> Dot then
RoundChar(PrevChar, Carry);
end;
if Carry then
Result := Neg + '1' + Copy(Result, 1, DecPos + Position)
else
Result := Neg + Copy(Result, 1, DecPos + Position);
end;
end;
{$ENDIF}