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root/public/ibx/branches/udr/client/IBUtils.pas

Comparing ibx/trunk/fbintf/IBUtils.pas (file contents):
Revision 56 by tony, Mon Mar 6 10:20:02 2017 UTC vs.
Revision 231 by tony, Mon Apr 16 08:32:21 2018 UTC

#	Line 33 | Line 33
33
34		unit IBUtils;
35		{$IFDEF MSWINDOWS}
36	<	{$DEFINE WINDOWS}
36	>	{$DEFINE WINDOWS}
37		{$ENDIF}
38
39		{$IFDEF FPC}
40		{$Mode Delphi}
41		{$codepage UTF8}
42	+	{$define HASREQEX}
43		{$ENDIF}
44
45	+
46		interface
47
48	<	uses Classes, SysUtils;
48	>	uses Classes, SysUtils, IB;
49
50		const
51		CRLF = #13 + #10;
#	Line 52 | Line 54 | const
54		TAB  = #9;
55		NULL_TERMINATOR = #0;
56
57	<	sqlReservedWords: array [0..197] of string = (
57	>	sqlReservedWords: array [0..198] of string = (
58		'ADD',
59		'ADMIN',
60		'ALL',
#	Line 144 | Line 146 | const
146		'INTO',
147		'IS',
148		'JOIN',
149	+	'KEY',
150		'LEADING',
151		'LEFT',
152		'LIKE',
#	Line 258 | Line 261 | function Min(n1, n2: Integer): Integer;
261		function RandomString(iLength: Integer): AnsiString;
262		function RandomInteger(iLow, iHigh: Integer): Integer;
263		function StripString(st: AnsiString; CharsToStrip: AnsiString): AnsiString;
261	–	function FormatIdentifier(Dialect: Integer; Value: AnsiString): AnsiString;
262	–	function FormatIdentifierValue(Dialect: Integer; Value: AnsiString): AnsiString;
263	–	function FormatIdentifierValueNC(Dialect: Integer; Value: AnsiString): AnsiString;
264		function ExtractIdentifier(Dialect: Integer; Value: AnsiString): AnsiString;
265		function QuoteIdentifier(Dialect: Integer; Value: AnsiString): AnsiString;
266		function QuoteIdentifierIfNeeded(Dialect: Integer; Value: AnsiString): AnsiString;
267		function Space2Underscore(s: AnsiString): AnsiString;
268		function SQLSafeString(const s: AnsiString): AnsiString;
269	+	function IsSQLIdentifier(Value: AnsiString): boolean;
270	+	function ExtractConnectString(const CreateSQL: AnsiString; var ConnectString: AnsiString): boolean;
271	+	function MakeConnectString(ServerName, DatabaseName: AnsiString; Protocol: TProtocol;
272	+	PortNo: AnsiString = ''): AnsiString;
273	+	function ParseConnectString(ConnectString: AnsiString;
274	+	var ServerName, DatabaseName: AnsiString; var Protocol: TProtocolAll;
275	+	var PortNo: AnsiString): boolean;
276	+	function GetProtocol(ConnectString: AnsiString): TProtocolAll;
277
278		implementation
279
280	+	{$IFDEF HASREQEX}
281	+	uses RegExpr;
282	+	{$ENDIF}
283	+
284		function Max(n1, n2: Integer): Integer;
285		begin
286		if (n1 > n2) then
#	Line 310 | Line 322 | begin
322		end;
323		end;
324
325	<	function FormatIdentifier(Dialect: Integer; Value: AnsiString): AnsiString;
314	<	begin
315	<	Value := Trim(Value);
316	<	if Dialect = 1 then
317	<	Value := AnsiUpperCase(Value)
318	<	else
319	<	if (Value <> '') and (Value[1] = '"') then
320	<	Value := '"' + StringReplace (TrimRight(Value), '"', '""', [rfReplaceAll]) + '"'
321	<	else
322	<	Value := AnsiUpperCase(Value);
323	<	Result := Value;
324	<	end;
325	>	{Extracts SQL Identifier typically from a  Dialect 3 encoding}
326
327	<	function FormatIdentifierValue(Dialect: Integer; Value: AnsiString): AnsiString;
327	>	function ExtractIdentifier(Dialect: Integer; Value: AnsiString): AnsiString;
328		begin
329		Value := Trim(Value);
330		if Dialect = 1 then
#	Line 342 | Line 343 | begin
343		Result := Value;
344		end;
345
346	<	function FormatIdentifierValueNC(Dialect: Integer; Value: AnsiString): AnsiString;
346	>	{Returns true if "w" is a Firebird SQL reserved word}
347	>
348	>	function IsReservedWord(w: AnsiString): boolean;
349	>	var i: integer;
350	>	begin
351	>	Result := true;
352	>	for i := 0 to Length(sqlReservedWords) - 1 do
353	>	if w = sqlReservedWords[i] then
354	>	Exit;
355	>	Result := false;
356	>	end;
357	>
358	>	{Format an SQL Identifier according to SQL Dialect}
359	>
360	>	function QuoteIdentifier(Dialect: Integer; Value: AnsiString): AnsiString;
361		begin
347	–	Value := Trim(Value);
362		if Dialect = 1 then
363	<	Value := AnsiUpperCase(Value)
363	>	Value := AnsiUpperCase(Trim(Value))
364		else
365	+	Value := '"' + StringReplace (Value, '""', '"', [rfReplaceAll]) + '"';
366	+	Result := Value;
367	+	end;
368	+
369	+	const
370	+	ValidSQLIdentifierChars = ['A'..'Z','a'..'z','0'..'9','_','$'];
371	+
372	+	{Returns true if the value is a valid SQL Identifier - note lower case accepted}
373	+
374	+	function IsSQLIdentifier(Value: AnsiString): boolean;
375	+	var i: integer;
376	+	begin
377	+	Result := false;
378	+	for i := 1 to Length(Value) do
379	+	if not (Value[i] in ValidSQLIdentifierChars) then Exit;
380	+	Result := true;
381	+	end;
382	+
383	+	{Extracts the Database Connect string from a Create Database Statement}
384	+
385	+	{$IFDEF HASREQEX}
386	+	function ExtractConnectString(const CreateSQL: AnsiString;
387	+	var ConnectString: AnsiString): boolean;
388	+	var RegexObj: TRegExpr;
389	+	begin
390	+	RegexObj := TRegExpr.Create;
391	+	try
392	+	{extact database file spec}
393	+	RegexObj.ModifierG := false; {turn off greedy matches}
394	+	RegexObj.ModifierI := true; {case insensitive match}
395	+	RegexObj.Expression := '^ *CREATE +(DATABASE|SCHEMA) +''(.*)''';
396	+	Result := RegexObj.Exec(CreateSQL);
397	+	if Result then
398	+	ConnectString := RegexObj.Match[2];
399	+	finally
400	+	RegexObj.Free;
401	+	end;
402	+	end;
403	+
404	+	function ParseConnectString(ConnectString: AnsiString; var ServerName,
405	+	DatabaseName: AnsiString; var Protocol: TProtocolAll; var PortNo: AnsiString
406	+	): boolean;
407	+
408	+	function GetProtocol(scheme: AnsiString): TProtocolAll;
409		begin
410	<	if (Value <> '') and (Value[1] = '"') then
410	>	scheme := AnsiUpperCase(scheme);
411	>	if scheme = 'INET' then
412	>	Result := inet
413	>	else
414	>	if scheme = 'INET4' then
415	>	Result := inet4
416	>	else
417	>	if scheme = 'INET6' then
418	>	Result := inet6
419	>	else
420	>	if scheme = 'XNET' then
421	>	Result := xnet
422	>	else
423	>	if scheme = 'WNET' then
424	>	Result := wnet
425	>	end;
426	>
427	>	var RegexObj: TRegExpr;
428	>	begin
429	>	ServerName := '';
430	>	DatabaseName := ConnectString;
431	>	PortNo := '';
432	>	Protocol := unknownProtocol;
433	>	RegexObj := TRegExpr.Create;
434	>	try
435	>	{extact database file spec}
436	>	RegexObj.ModifierG := false; {turn off greedy matches}
437	>	RegexObj.Expression := '^([a-zA-Z46]+)://([a-zA-Z0-9\-\.]*)(|:[0-9a-zA-Z\-]+)/(.*)$';
438	>	Result := RegexObj.Exec(ConnectString);
439	>	if Result then
440		begin
441	<	Delete(Value, 1, 1);
442	<	Delete(Value, Length(Value), 1);
443	<	Value := AnsiUpperCase(StringReplace (Value, '""', '"', [rfReplaceAll]));
441	>	{URL type connect string}
442	>	Protocol := GetProtocol(RegexObj.Match[1]);
443	>	ServerName := RegexObj.Match[2];
444	>	if RegexObj.MatchLen[3] > 0 then
445	>	PortNo := system.Copy(ConnectString,RegexObj.MatchPos[3]+1,RegexObj.MatchLen[3]-1);
446	>	DatabaseName := RegexObj.Match[4];
447	>	if ServerName = '' then
448	>	DatabaseName := '/' + DatabaseName;
449		end
450		else
451	<	Value := AnsiUpperCase(Value);
451	>	begin
452	>	{URL type connect string - local loop}
453	>	RegexObj.Expression := '^([a-zA-Z46]+)://(.*)$';
454	>	Result := RegexObj.Exec(ConnectString);
455	>	if Result then
456	>	begin
457	>	Protocol := GetProtocol(RegexObj.Match[1]);
458	>	DatabaseName := RegexObj.Match[2];
459	>	end
460	>	else
461	>	begin
462	>	RegexObj.Expression := '^([a-zA-Z]:\\.*)';
463	>	Result := RegexObj.Exec(ConnectString);
464	>	if Result then
465	>	Protocol := Local {Windows with leading drive ID}
466	>	else
467	>	begin
468	>	RegexObj.Expression := '^([a-zA-Z0-9\-\.]+)(|/[0-9a-zA-Z\-]+):(.*)$';
469	>	Result := RegexObj.Exec(ConnectString);
470	>	if Result then
471	>	begin
472	>	{Legacy TCP Format}
473	>	ServerName := RegexObj.Match[1];
474	>	if RegexObj.MatchLen[2] > 0 then
475	>	PortNo := system.Copy(ConnectString,RegexObj.MatchPos[2]+1,RegexObj.MatchLen[2]-1);
476	>	DatabaseName := RegexObj.Match[3];
477	>	Protocol := TCP;
478	>	end
479	>	else
480	>	begin
481	>	RegexObj.Expression := '^\\\\([a-zA-Z0-9\-\.]+)(|@[0-9a-zA-Z\-]+)\\(.*)$';
482	>	Result := RegexObj.Exec(ConnectString);
483	>	if Result then
484	>	begin
485	>	{Netbui}
486	>	ServerName := RegexObj.Match[1];
487	>	if RegexObj.MatchLen[2] > 0 then
488	>	PortNo := system.Copy(ConnectString,RegexObj.MatchPos[2]+1,RegexObj.MatchLen[2]-1);
489	>	DatabaseName := RegexObj.Match[3];
490	>	Protocol := NamedPipe
491	>	end
492	>	else
493	>	begin
494	>	Result := true;
495	>	Protocol := Local; {Assume local}
496	>	end;
497	>	end;
498	>	end;
499	>	end;
500	>	end;
501	>	finally
502	>	RegexObj.Free;
503		end;
361	–	Result := Value;
504		end;
505
506	<	function ExtractIdentifier(Dialect: Integer; Value: AnsiString): AnsiString;
506	>	function GetProtocol(ConnectString: AnsiString): TProtocolAll;
507	>	var ServerName,
508	>	DatabaseName: AnsiString;
509	>	PortNo: AnsiString;
510	>	begin
511	>	ParseConnectString(ConnectString,ServerName,DatabaseName,Result,PortNo);
512	>	end;
513	>
514	>	{$ELSE}
515	>	{cruder version of above for Delphi. Older versions lack regular expression
516	>	handling.}
517	>	function ExtractConnectString(const CreateSQL: AnsiString;
518	>	var ConnectString: AnsiString): boolean;
519	>	var i: integer;
520		begin
521	<	Value := Trim(Value);
522	<	if Dialect = 1 then
523	<	Value := AnsiUpperCase(Value)
369	<	else
521	>	Result := false;
522	>	i := Pos('''',CreateSQL);
523	>	if i > 0 then
524		begin
525	<	if (Value <> '') and (Value[1] = '"') then
525	>	ConnectString := CreateSQL;
526	>	delete(ConnectString,1,i);
527	>	i := Pos('''',ConnectString);
528	>	if i > 0 then
529		begin
530	<	Delete(Value, 1, 1);
531	<	Delete(Value, Length(Value), 1);
532	<	Value := StringReplace (Value, '""', '"', [rfReplaceAll]);
376	<	end
377	<	else
378	<	Value := AnsiUpperCase(Value);
530	>	delete(ConnectString,i,Length(ConnectString)-i+1);
531	>	Result := true;
532	>	end;
533		end;
380	–	Result := Value;
534		end;
535
536	<	function IsReservedWord(w: AnsiString): boolean;
384	<	var i: integer;
536	>	function GetProtocol(ConnectString: AnsiString): TProtocolAll;
537		begin
538	<	Result := true;
387	<	for i := 0 to Length(sqlReservedWords) - 1 do
388	<	if w = sqlReservedWords[i] then
389	<	Exit;
390	<	Result := false;
538	>	Result := unknownProtocol; {not implemented for Delphi}
539		end;
540
541	<	function QuoteIdentifier(Dialect: Integer; Value: AnsiString): AnsiString;
541	>	function ParseConnectString(ConnectString: AnsiString;
542	>	var ServerName, DatabaseName: AnsiString; var Protocol: TProtocolAll;
543	>	var PortNo: AnsiString): boolean;
544		begin
545	<	if Dialect = 1 then
546	<	Value := AnsiUpperCase(Trim(Value))
547	<	else
548	<	Value := '"' + Value + '"';
549	<	Result := Value;
545	>	Result := false;
546	>	end;
547	>
548	>	{$ENDIF}
549	>
550	>	{Make a connect string in format appropriate protocol}
551	>
552	>	function MakeConnectString(ServerName, DatabaseName: AnsiString;
553	>	Protocol: TProtocol; PortNo: AnsiString): AnsiString;
554	>
555	>	function FormatURL: AnsiString;
556	>	begin
557	>	if (ServerName = '') and (Pos('/',DatabaseName) <= 1) then
558	>	Result := DatabaseName
559	>	else
560	>	Result := ServerName + '/' + DatabaseName;
561	>	end;
562	>
563	>	begin
564	>	if PortNo <> '' then
565	>	case Protocol of
566	>	NamedPipe:
567	>	ServerName := ServerName + '@' + PortNo;
568	>	Local,
569	>	SPX,
570	>	xnet: {do nothing};
571	>	TCP:
572	>	ServerName := ServerName + '/' + PortNo;
573	>	else
574	>	ServerName := ServerName + ':' + PortNo;
575	>	end;
576	>
577	>	case Protocol of
578	>	TCP:        Result := ServerName + ':' + DatabaseName; {do not localize}
579	>	SPX:        Result := ServerName + '@' + DatabaseName; {do not localize}
580	>	NamedPipe:  Result := '\\' + ServerName + '\' + DatabaseName; {do not localize}
581	>	Local:      Result := DatabaseName; {do not localize}
582	>	inet:       Result := 'inet://' + FormatURL; {do not localize}
583	>	inet4:       Result := 'inet4://' + FormatURL; {do not localize}
584	>	inet6:       Result := 'inet6://' + FormatURL; {do not localize}
585	>	wnet:       Result := 'wnet://' + FormatURL; {do not localize}
586	>	xnet:       Result := 'xnet://' + FormatURL;  {do not localize}
587	>	end;
588		end;
589
590	+	{Format an SQL Identifier according to SQL Dialect with encapsulation if necessary}
591	+
592		function QuoteIdentifierIfNeeded(Dialect: Integer; Value: AnsiString): AnsiString;
593		begin
594		if (Dialect = 3) and
595	<	((AnsiUpperCase(Value) <> Value) or IsReservedWord(Value)) then
596	<	Result := '"' + Value + '"'
595	>	(IsReservedWord(Value) or not IsSQLIdentifier(Value) or (AnsiUpperCase(Value) <> Value)) then
596	>	Result := '"' + StringReplace (TrimRight(Value), '"', '""', [rfReplaceAll]) + '"'
597		else
598		Result := Value
599		end;
600
601	+	{Replaces unknown characters in a string with underscores}
602	+
603		function Space2Underscore(s: AnsiString): AnsiString;
604		var
605		k: integer;
606		begin
607		Result := s;
608		for k := 1 to Length(s) do
609	<	if not (Result[k] in ['0'..'9','A'..'Z','_','$'])  then
609	>	if not (Result[k] in ValidSQLIdentifierChars)  then
610		Result[k] := '_';
611		end;
612
613	+	{Reformats an SQL string with single quotes duplicated.}
614	+
615		function SQLSafeString(const s: AnsiString): AnsiString;
616		begin
617		Result := StringReplace(s,'''','''''',[rfReplaceAll]);

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