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root/public/ibx/branches/journaling/fbintf/IBUtils.pas

Comparing ibx/trunk/fbintf/IBUtils.pas (file contents):
Revision 348 by tony, Wed Oct 6 09:38:14 2021 UTC vs.
Revision 353 by tony, Sat Oct 23 14:11:37 2021 UTC

#	Line 648 | Line 648 | function FBFormatDateTime(fmt: AnsiStrin
648		function FormatTimeZoneOffset(EffectiveTimeOffsetMins: integer): AnsiString;
649		function DecodeTimeZoneOffset(TZOffset: AnsiString; var dstOffset: integer): boolean;
650		function StripLeadingZeros(Value: AnsiString): AnsiString;
651	+	function TryStrToNumeric(S: Ansistring; out Value: int64; out scale: integer): boolean;
652	+	function NumericToDouble(aValue: Int64; aScale: integer): double;
653	+
654
655		implementation
656
657	<	uses FBMessages
657	>	uses FBMessages, Math
658
659		{$IFDEF FPC}
660		,RegExpr
#	Line 1472 | Line 1475 | begin
1475		GetNext;
1476
1477		repeat
1478	+	if FSkipNext then
1479	+	begin
1480	+	FSkipNext := false;
1481	+	GetNext;
1482	+	end;
1483	+
1484		Result := FNextToken;
1485		C := FLastChar;
1486		GetNext;
1487
1488	<	if FSkipNext then
1488	>	if (Result = sqltCR) and (FNextToken = sqltEOL) then
1489		begin
1490	<	FSkipNext := false;
1491	<	continue;
1490	>	FSkipNext := true;
1491	>	Result := sqltEOL;
1492	>	C := LF;
1493		end;
1494
1495		case FState of
#	Line 1492 | Line 1502 | begin
1502		GetNext;
1503		end
1504		else
1505	+	if Result = sqltEOL then
1506	+	FString := FString + LineEnding
1507	+	else
1508		FString := FString + C;
1509		end;
1510
#	Line 1504 | Line 1517 | begin
1517		Result := sqltCommentLine;
1518		end;
1519
1507	–	sqltCR: {ignore};
1508	–
1520		else
1521		FString := FString + C;
1522		end;
#	Line 1527 | Line 1538 | begin
1538		end;
1539		end
1540		else
1541	+	if Result = sqltEOL then
1542	+	FString := FString + LineEnding
1543	+	else
1544		FString := FString + C;
1545		end;
1546
#	Line 1546 | Line 1560 | begin
1560		end;
1561		end
1562		else
1563	+	if Result = sqltEOL then
1564	+	FString := FString + LineEnding
1565	+	else
1566		FString := FString + C;
1567		end;
1568
#	Line 1626 | Line 1643 | begin
1643		sqltNumberString:
1644		if FNextToken in [sqltNumberString,sqltPeriod] then
1645		FState := stInNumeric;
1646	+
1647	+	sqltEOL:
1648	+	FString := LineEnding;
1649		end;
1650		end;
1651		end;
#	Line 1823 | Line 1843 | begin
1843		end;
1844		end;
1845
1846	+	function TryStrToNumeric(S: Ansistring; out Value: int64; out scale: integer): boolean;
1847	+	var i: integer;
1848	+	ds: integer;
1849	+	exponent: integer;
1850	+	begin
1851	+	Result := false;
1852	+	ds := 0;
1853	+	exponent := 0;
1854	+	S := Trim(S);
1855	+	Value := 0;
1856	+	scale := 0;
1857	+	if Length(S) = 0 then
1858	+	Exit;
1859	+	{$IF declared(DefaultFormatSettings)}
1860	+	with DefaultFormatSettings do
1861	+	{$ELSE}
1862	+	{$IF declared(FormatSettings)}
1863	+	with FormatSettings do
1864	+	{$IFEND}
1865	+	{$IFEND}
1866	+	begin
1867	+	{ThousandSeparator not allowed as by Delphi specs}
1868	+	if (ThousandSeparator <> DecimalSeparator) and
1869	+	(Pos(ThousandSeparator, S) <> 0) then
1870	+	Exit;
1871	+
1872	+	for i := length(S) downto 1 do
1873	+	begin
1874	+	if S[i] = AnsiChar(DecimalSeparator) then
1875	+	begin
1876	+	if ds <> 0 then Exit; {only one allowed}
1877	+	ds := i-1;
1878	+	dec(exponent);
1879	+	system.Delete(S,i,1);
1880	+	end
1881	+	else
1882	+	if (i > 1) and (S[i] in ['+','-']) and not (S[i-1] in ['e','E']) then
1883	+	Exit {malformed}
1884	+	else
1885	+	if S[i] in ['e','E'] then {scientific notation}
1886	+	begin
1887	+	if ds <> 0 then Exit; {not permitted in exponent}
1888	+	if exponent <> 0 then Exit; {only one allowed}
1889	+	exponent := i;
1890	+	end
1891	+	else
1892	+	if not (S[i] in ['0'..'9']) then
1893	+	Exit; {bad character}
1894	+	end;
1895	+
1896	+	if exponent > 0 then
1897	+	begin
1898	+	Result := TryStrToInt(system.copy(S,exponent+1,maxint),Scale);
1899	+	if Result then
1900	+	begin
1901	+	{adjust scale for decimal point}
1902	+	Scale := Scale - (exponent - ds - 1);
1903	+	Result := TryStrToInt64(system.copy(S,1,exponent-1),Value);
1904	+	end;
1905	+	end
1906	+	else
1907	+	begin
1908	+	if ds <> 0 then
1909	+	scale := ds - Length(S);
1910	+	Result := TryStrToInt64(S,Value);
1911	+	end;
1912	+	end;
1913	+	end;
1914	+
1915	+	function NumericToDouble(aValue: Int64; aScale: integer): double;
1916	+	begin
1917	+	Result := aValue * IntPower(10,aScale)
1918	+	end;
1919	+
1920		end.

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