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

Comparing ibx/trunk/fbintf/IBUtils.pas (file contents):
Revision 265 by tony, Sat Dec 8 11:22:27 2018 UTC vs.
Revision 287 by tony, Thu Apr 11 08:51:23 2019 UTC

#	Line 258 | Line 258 | type
258		sqltPlaceholder,
259		sqltSingleQuotes,
260		sqltDoubleQuotes,
261	+	sqltBackslash,
262		sqltComma,
263		sqltPeriod,
264		sqltEquals,
#	Line 279 | Line 280 | type
280		sqltOpenBracket,
281		sqltCloseBracket,
282		sqltPipe,
283	+	sqltMinus,
284		sqltConcatSymbol,
285		sqltLT,
286		sqltGT,
#	Line 592 | Line 594 | type
594		function TokenFound(var token: TSQLTokens): boolean; override;
595		end;
596
597	+	{ TSQLParamProcessor }
598	+
599	+	TSQLParamProcessor = class(TSQLwithNamedParamsTokeniser)
600	+	private
601	+	const
602	+	sIBXParam = 'IBXParam';  {do not localize}
603	+	private
604	+	FInString: AnsiString;
605	+	FIndex: integer;
606	+	function DoExecute(GenerateParamNames: boolean;
607	+	var slNames: TStrings): AnsiString;
608	+	protected
609	+	function GetChar: AnsiChar; override;
610	+	public
611	+	class function Execute(sSQL: AnsiString; GenerateParamNames: boolean;
612	+	var slNames: TStrings): AnsiString;
613	+	end;
614	+
615	+
616		function Max(n1, n2: Integer): Integer;
617		function Min(n1, n2: Integer): Integer;
618		function RandomString(iLength: Integer): AnsiString;
#	Line 974 | Line 995 | begin
995		Result := StringReplace(s,'''','''''',[rfReplaceAll]);
996		end;
997
998	+	{ TSQLParamProcessor }
999	+
1000	+	function TSQLParamProcessor.DoExecute(GenerateParamNames: boolean;
1001	+	var slNames: TStrings): AnsiString;
1002	+	var token: TSQLTokens;
1003	+	iParamSuffix: Integer;
1004	+	begin
1005	+	Result := '';
1006	+	iParamSuffix := 0;
1007	+
1008	+	while not EOF do
1009	+	begin
1010	+	token := GetNextToken;
1011	+	case token of
1012	+	sqltParam,
1013	+	sqltQuotedParam:
1014	+	begin
1015	+	Result := Result + '?';
1016	+	slNames.Add(TokenText);
1017	+	end;
1018	+
1019	+	sqltPlaceHolder:
1020	+	if GenerateParamNames then
1021	+	begin
1022	+	Inc(iParamSuffix);
1023	+	slNames.AddObject(sIBXParam + IntToStr(iParamSuffix),self); //Note local convention
1024	+	//add pointer to self to mark entry
1025	+	Result := Result + '?';
1026	+	end
1027	+	else
1028	+	IBError(ibxeSQLParseError, [SParamNameExpected]);
1029	+
1030	+	sqltQuotedString:
1031	+	Result := Result + '''' + SQLSafeString(TokenText) + '''';
1032	+
1033	+	sqltIdentifierInDoubleQuotes:
1034	+	Result := Result + '"' + StringReplace(TokenText,'"','""',[rfReplaceAll]) + '"';
1035	+
1036	+	sqltComment:
1037	+	Result := Result + '/*' + TokenText + '*/';
1038	+
1039	+	sqltCommentLine:
1040	+	Result := Result + '--' + TokenText + LineEnding;
1041	+
1042	+	sqltEOL:
1043	+	Result := Result + LineEnding;
1044	+
1045	+	else
1046	+	Result := Result + TokenText;
1047	+	end;
1048	+	end;
1049	+	end;
1050	+
1051	+	function TSQLParamProcessor.GetChar: AnsiChar;
1052	+	begin
1053	+	if FIndex <= Length(FInString) then
1054	+	begin
1055	+	Result := FInString[FIndex];
1056	+	Inc(FIndex);
1057	+	end
1058	+	else
1059	+	Result := #0;
1060	+	end;
1061	+
1062	+	class function TSQLParamProcessor.Execute(sSQL: AnsiString;
1063	+	GenerateParamNames: boolean; var slNames: TStrings): AnsiString;
1064	+	begin
1065	+	with self.Create do
1066	+	try
1067	+	FInString := sSQL;
1068	+	FIndex := 1;
1069	+	Result := DoExecute(GenerateParamNames,slNames);
1070	+	finally
1071	+	Free;
1072	+	end;
1073	+	end;
1074	+
1075		{ TSQLwithNamedParamsTokeniser }
1076
1077		procedure TSQLwithNamedParamsTokeniser.Assign(source: TSQLTokeniser);
#	Line 1093 | Line 1191 | begin
1191		Result := sqltSingleQuotes;
1192		'/':
1193		Result := sqltForwardSlash;
1194	+	'\':
1195	+	Result := sqltBackslash;
1196		'*':
1197		Result := sqltAsterisk;
1198		'(':
#	Line 1111 | Line 1211 | begin
1211		Result := sqltOpenSquareBracket;
1212		']':
1213		Result := sqltCloseSquareBracket;
1214	+	'-':
1215	+	Result := sqltMinus;
1216		'<':
1217		Result := sqltLT;
1218		'>':
#	Line 1383 | Line 1485 | begin
1485		GetNext;
1486		FState := stInComment;
1487		end
1488	<	else
1489	<	if FNextToken = sqltForwardSlash then
1488	>	end;
1489	>
1490	>	sqltMinus:
1491	>	begin
1492	>	if FNextToken = sqltMinus then
1493		begin
1494		FString := '';
1495		GetNext;

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