journaling/fbintf/IBUtils.pas

{************************************************************************}
{                                                                        }
{       Borland Delphi Visual Component Library                          }
{       InterBase Express core components                                }
{                                                                        }
{       Copyright (c) 1998-2000 Inprise Corporation                      }
{                                                                        }
{    InterBase Express is based in part on the product                   }
{    Free IB Components, written by Gregory H. Deatz for                 }
{    Hoagland, Longo, Moran, Dunst & Doukas Company.                     }
{    Free IB Components is used under license.                           }
{                                                                        }
{    The contents of this file are subject to the InterBase              }
{    Public License Version 1.0 (the "License"); you may not             }
{    use this file except in compliance with the License. You            }
{    may obtain a copy of the License at http://www.Inprise.com/IPL.html }
{    Software distributed under the License is distributed on            }
{    an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either              }
{    express or implied. See the License for the specific language       }
{    governing rights and limitations under the License.                 }
{    The Original Code was created by InterBase Software Corporation     }
{       and its successors.                                              }
{    Portions created by Inprise Corporation are Copyright (C) Inprise   }
{       Corporation. All Rights Reserved.                                }
{    Contributor(s): Jeff Overcash                                       }
{                                                                        }
{    IBX For Lazarus (Firebird Express)                                  }
{    Contributor: Tony Whyman, MWA Software http://www.mwasoftware.co.uk }
{    Portions created by MWA Software are copyright McCallum Whyman      }
{    Associates Ltd 2011                                                 }
{                                                                        }
{************************************************************************}

unit IBUtils;
{$IFDEF MSWINDOWS} 
{$DEFINE WINDOWS}
{$ENDIF}

{$IFDEF FPC}
{$Mode Delphi}
{$codepage UTF8}
{$define HASREQEX}
{$ENDIF}


interface

uses Classes, SysUtils;

const
  CRLF = #13 + #10;
  CR   = #13;
  LF   = #10;
  TAB  = #9;
  NULL_TERMINATOR = #0;

  sqlReservedWords: array [0..197] of string = (
  'ADD',
  'ADMIN',
  'ALL',
  'ALTER',
  'AND',
  'ANY',
  'AS',
  'AT',
  'AVG',
  'BEGIN',
  'BETWEEN',
  'BIGINT',
  'BIT_LENGTH',
  'BLOB',
  'BOOLEAN',
  'BOTH',
  'BY',
  'CASE',
  'CAST',
  'CHAR',
  'CHAR_LENGTH',
  'CHARACTER',
  'CHARACTER_LENGTH',
  'CHECK',
  'CLOSE',
  'COLLATE',
  'COLUMN',
  'COMMIT',
  'CONNECT',
  'CONSTRAINT',
  'CORR',
  'COUNT',
  'COVAR_POP',
  'COVAR_SAMP',
  'CREATE',
  'CROSS',
  'CURRENT',
  'CURRENT_CONNECTION',
  'CURRENT_DATE',
  'CURRENT_ROLE',
  'CURRENT_TIME',
  'CURRENT_TIMESTAMP',
  'CURRENT_TRANSACTION',
  'CURRENT_USER',
  'CURSOR',
  'DATE',
  'DAY',
  'DEC',
  'DECIMAL',
  'DECLARE',
  'DEFAULT',
  'DELETE',
  'DELETING',
  'DETERMINISTIC',
  'DISCONNECT',
  'DISTINCT',
  'DOUBLE',
  'DROP',
  'ELSE',
  'END',
  'ESCAPE',
  'EXECUTE',
  'EXISTS',
  'EXTERNAL',
  'EXTRACT',
  'FALSE',
  'FETCH',
  'FILTER',
  'FLOAT',
  'FOR',
  'FOREIGN',
  'FROM',
  'FULL',
  'FUNCTION',
  'GDSCODE',
  'GLOBAL',
  'GRANT',
  'GROUP',
  'HAVING',
  'HOUR',
  'IN',
  'INDEX',
  'INNER',
  'INSENSITIVE',
  'INSERT',
  'INSERTING',
  'INT',
  'INTEGER',
  'INTO',
  'IS',
  'JOIN',
  'LEADING',
  'LEFT',
  'LIKE',
  'LONG',
  'LOWER',
  'MAX',
  'MAXIMUM_SEGMENT',
  'MERGE',
  'MIN',
  'MINUTE',
  'MONTH',
  'NATIONAL',
  'NATURAL',
  'NCHAR',
  'NO',
  'NOT',
  'NULL',
  'NUMERIC',
  'OCTET_LENGTH',
  'OF',
  'OFFSET',
  'ON',
  'ONLY',
  'OPEN',
  'OR',
  'ORDER',
  'OUTER',
  'OVER',
  'PARAMETER',
  'PLAN',
  'POSITION',
  'POST_EVENT',
  'PRECISION',
  'PRIMARY',
  'PROCEDURE',
  'RDB$DB_KEY',
  'RDB$RECORD_VERSION',
  'REAL',
  'RECORD_VERSION',
  'RECREATE',
  'RECURSIVE',
  'REFERENCES',
  'REGR_AVGX',
  'REGR_AVGY',
  'REGR_COUNT',
  'REGR_INTERCEPT',
  'REGR_R2',
  'REGR_SLOPE',
  'REGR_SXX',
  'REGR_SXY',
  'REGR_SYY',
  'RELEASE',
  'RETURN',
  'RETURNING_VALUES',
  'RETURNS',
  'REVOKE',
  'RIGHT',
  'ROLLBACK',
  'ROW',
  'ROW_COUNT',
  'ROWS',
  'SAVEPOINT',
  'SCROLL',
  'SECOND',
  'SELECT',
  'SENSITIVE',
  'SET',
  'SIMILAR',
  'SMALLINT',
  'SOME',
  'SQLCODE',
  'SQLSTATE',
  'SQLSTATE',
  'START',
  'STDDEV_POP',
  'STDDEV_SAMP',
  'SUM',
  'TABLE',
  'THEN',
  'TIME',
  'TIMESTAMP',
  'TO',
  'TRAILING',
  'TRIGGER',
  'TRIM',
  'TRUE',
  'UNION',
  'UNIQUE',
  'UNKNOWN',
  'UPDATE',
  'UPDATING',
  'UPPER',
  'USER',
  'USING',
  'VALUE',
  'VALUES',
  'VAR_POP',
  'VAR_SAMP',
  'VARCHAR',
  'VARIABLE',
  'VARYING',
  'VIEW',
  'WHEN',
  'WHERE',
  'WHILE',
  'WITH',
  'YEAR'
  );

function Max(n1, n2: Integer): Integer;
function Min(n1, n2: Integer): Integer;
function RandomString(iLength: Integer): AnsiString;
function RandomInteger(iLow, iHigh: Integer): Integer;
function StripString(st: AnsiString; CharsToStrip: AnsiString): AnsiString;
function ExtractIdentifier(Dialect: Integer; Value: AnsiString): AnsiString;
function QuoteIdentifier(Dialect: Integer; Value: AnsiString): AnsiString;
function QuoteIdentifierIfNeeded(Dialect: Integer; Value: AnsiString): AnsiString;
function Space2Underscore(s: AnsiString): AnsiString;
function SQLSafeString(const s: AnsiString): AnsiString;
function IsSQLIdentifier(Value: AnsiString): boolean;
function ExtractConnectString(const CreateSQL: AnsiString; var ConnectString: AnsiString): boolean;

implementation

{$IFDEF HASREQEX}
uses RegExpr;
{$ENDIF}

function Max(n1, n2: Integer): Integer;
begin
  if (n1 > n2) then
    result := n1
  else
    result := n2;
end;

function Min(n1, n2: Integer): Integer;
begin
  if (n1 < n2) then
    result := n1
  else
    result := n2;
end;

function RandomString(iLength: Integer): AnsiString;
begin
  result := '';
  while Length(result) < iLength do
    result := result + IntToStr(RandomInteger(0, High(Integer)));
  if Length(result) > iLength then
    result := Copy(result, 1, iLength);
end;

function RandomInteger(iLow, iHigh: Integer): Integer;
begin
  result := Trunc(Random(iHigh - iLow)) + iLow;
end;

function StripString(st: AnsiString; CharsToStrip: AnsiString): AnsiString;
var
  i: Integer;
begin
  result := '';
  for i := 1 to Length(st) do begin
    if AnsiPos(st[i], CharsToStrip) = 0 then
      result := result + st[i];
  end;
end;

{Extracts SQL Identifier typically from a  Dialect 3 encoding}

function ExtractIdentifier(Dialect: Integer; Value: AnsiString): AnsiString;
begin
  Value := Trim(Value);
  if Dialect = 1 then
    Value := AnsiUpperCase(Value)  
  else
  begin
    if (Value <> '') and (Value[1] = '"') then
    begin
      Delete(Value, 1, 1);
      Delete(Value, Length(Value), 1);
      Value := StringReplace (Value, '""', '"', [rfReplaceAll]);
    end
    else
      Value := AnsiUpperCase(Value);
  end;
  Result := Value;
end;

{Returns true if "w" is a Firebird SQL reserved word}

function IsReservedWord(w: AnsiString): boolean;
var i: integer;
begin
     Result := true;
     for i := 0 to Length(sqlReservedWords) - 1 do
         if w = sqlReservedWords[i] then
            Exit;
     Result := false;
end;

{Format an SQL Identifier according to SQL Dialect}

function QuoteIdentifier(Dialect: Integer; Value: AnsiString): AnsiString;
begin
  if Dialect = 1 then
    Value := AnsiUpperCase(Trim(Value))
  else
    Value := '"' + StringReplace (Value, '""', '"', [rfReplaceAll]) + '"';
  Result := Value;
end;

const
  ValidSQLIdentifierChars = ['A'..'Z','a'..'z','0'..'9','_','$'];

{Returns true if the value is a valid SQL Identifier - note lower case accepted}

function IsSQLIdentifier(Value: AnsiString): boolean;
var i: integer;
begin
  Result := false;
  for i := 1 to Length(Value) do
    if not (Value[i] in ValidSQLIdentifierChars) then Exit;
  Result := true;
end;

{Extracts the Database Connect string from a Create Database Statement}

{$IFDEF HASREQEX}
function ExtractConnectString(const CreateSQL: AnsiString;
  var ConnectString: AnsiString): boolean;
var RegexObj: TRegExpr;
begin
  RegexObj := TRegExpr.Create;
  try
    {extact database file spec}
    RegexObj.ModifierG := false; {turn off greedy matches}
    RegexObj.ModifierI := true; {case insensitive match}
    RegexObj.Expression := '^ *CREATE +(DATABASE|SCHEMA) +''(.*)''';
    Result := RegexObj.Exec(CreateSQL);
    if Result then
      ConnectString := system.copy(CreateSQL,RegexObj.MatchPos[2],RegexObj.MatchLen[2]);
  finally
    RegexObj.Free;
  end;
end;
{$ELSE}
{cruder version of above for old versions of Delphi}
function ExtractConnectString(const CreateSQL: AnsiString;
  var ConnectString: AnsiString): boolean;
var i: integer;
begin
  Result := false;
  i := Pos('''',CreateSQL);
  if i > 0 then
  begin
    ConnectString := CreateSQL;
    delete(ConnectString,1,i);
    i := Pos('''',ConnectString);
    if i > 0 then
    begin
      delete(ConnectString,i,Length(ConnectString)-i+1);
      Result := true;
    end;
  end;
end;
{$ENDIF}

{Format an SQL Identifier according to SQL Dialect with encapsulation if necessary}

function QuoteIdentifierIfNeeded(Dialect: Integer; Value: AnsiString): AnsiString;
begin
  if (Dialect = 3) and
    (IsReservedWord(Value) or not IsSQLIdentifier(Value) or (AnsiUpperCase(Value) <> Value)) then
     Result := '"' + StringReplace (TrimRight(Value), '"', '""', [rfReplaceAll]) + '"'
  else
    Result := Value
end;

{Replaces unknown characters in a string with underscores}

function Space2Underscore(s: AnsiString): AnsiString;
var
   k: integer;
begin
     Result := s;
     for k := 1 to Length(s) do
         if not (Result[k] in ValidSQLIdentifierChars)  then
            Result[k] := '_';
end;

{Reformats an SQL string with single quotes duplicated.}

function SQLSafeString(const s: AnsiString): AnsiString;
begin
  Result := StringReplace(s,'''','''''',[rfReplaceAll]);
end;

end.
Revision:	120
Committed:	Mon Jan 22 13:58:20 2018 UTC (6 years, 2 months ago) by tony
Content type:	text/x-pascal
Original Path:	*ibx/trunk/fbintf/IBUtils.pas*
File size:	10384 byte(s)
Log Message:	Fixes Merged
#	Content
1	{************************************************************************}
2	{ }
3	{ Borland Delphi Visual Component Library }
4	{ InterBase Express core components }
5	{ }
6	{ Copyright (c) 1998-2000 Inprise Corporation }
7	{ }
8	{ InterBase Express is based in part on the product }
9	{ Free IB Components, written by Gregory H. Deatz for }
10	{ Hoagland, Longo, Moran, Dunst & Doukas Company. }
11	{ Free IB Components is used under license. }
12	{ }
13	{ The contents of this file are subject to the InterBase }
14	{ Public License Version 1.0 (the "License"); you may not }
15	{ use this file except in compliance with the License. You }
16	{ may obtain a copy of the License at http://www.Inprise.com/IPL.html }
17	{ Software distributed under the License is distributed on }
18	{ an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either }
19	{ express or implied. See the License for the specific language }
20	{ governing rights and limitations under the License. }
21	{ The Original Code was created by InterBase Software Corporation }
22	{ and its successors. }
23	{ Portions created by Inprise Corporation are Copyright (C) Inprise }
24	{ Corporation. All Rights Reserved. }
25	{ Contributor(s): Jeff Overcash }
26	{ }
27	{ IBX For Lazarus (Firebird Express) }
28	{ Contributor: Tony Whyman, MWA Software http://www.mwasoftware.co.uk }
29	{ Portions created by MWA Software are copyright McCallum Whyman }
30	{ Associates Ltd 2011 }
31	{ }
32	{************************************************************************}
33
34	unit IBUtils;
35	{$IFDEF MSWINDOWS}
36	{$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;
49
50	const
51	CRLF = #13 + #10;
52	CR = #13;
53	LF = #10;
54	TAB = #9;
55	NULL_TERMINATOR = #0;
56
57	sqlReservedWords: array [0..197] of string = (
58	'ADD',
59	'ADMIN',
60	'ALL',
61	'ALTER',
62	'AND',
63	'ANY',
64	'AS',
65	'AT',
66	'AVG',
67	'BEGIN',
68	'BETWEEN',
69	'BIGINT',
70	'BIT_LENGTH',
71	'BLOB',
72	'BOOLEAN',
73	'BOTH',
74	'BY',
75	'CASE',
76	'CAST',
77	'CHAR',
78	'CHAR_LENGTH',
79	'CHARACTER',
80	'CHARACTER_LENGTH',
81	'CHECK',
82	'CLOSE',
83	'COLLATE',
84	'COLUMN',
85	'COMMIT',
86	'CONNECT',
87	'CONSTRAINT',
88	'CORR',
89	'COUNT',
90	'COVAR_POP',
91	'COVAR_SAMP',
92	'CREATE',
93	'CROSS',
94	'CURRENT',
95	'CURRENT_CONNECTION',
96	'CURRENT_DATE',
97	'CURRENT_ROLE',
98	'CURRENT_TIME',
99	'CURRENT_TIMESTAMP',
100	'CURRENT_TRANSACTION',
101	'CURRENT_USER',
102	'CURSOR',
103	'DATE',
104	'DAY',
105	'DEC',
106	'DECIMAL',
107	'DECLARE',
108	'DEFAULT',
109	'DELETE',
110	'DELETING',
111	'DETERMINISTIC',
112	'DISCONNECT',
113	'DISTINCT',
114	'DOUBLE',
115	'DROP',
116	'ELSE',
117	'END',
118	'ESCAPE',
119	'EXECUTE',
120	'EXISTS',
121	'EXTERNAL',
122	'EXTRACT',
123	'FALSE',
124	'FETCH',
125	'FILTER',
126	'FLOAT',
127	'FOR',
128	'FOREIGN',
129	'FROM',
130	'FULL',
131	'FUNCTION',
132	'GDSCODE',
133	'GLOBAL',
134	'GRANT',
135	'GROUP',
136	'HAVING',
137	'HOUR',
138	'IN',
139	'INDEX',
140	'INNER',
141	'INSENSITIVE',
142	'INSERT',
143	'INSERTING',
144	'INT',
145	'INTEGER',
146	'INTO',
147	'IS',
148	'JOIN',
149	'LEADING',
150	'LEFT',
151	'LIKE',
152	'LONG',
153	'LOWER',
154	'MAX',
155	'MAXIMUM_SEGMENT',
156	'MERGE',
157	'MIN',
158	'MINUTE',
159	'MONTH',
160	'NATIONAL',
161	'NATURAL',
162	'NCHAR',
163	'NO',
164	'NOT',
165	'NULL',
166	'NUMERIC',
167	'OCTET_LENGTH',
168	'OF',
169	'OFFSET',
170	'ON',
171	'ONLY',
172	'OPEN',
173	'OR',
174	'ORDER',
175	'OUTER',
176	'OVER',
177	'PARAMETER',
178	'PLAN',
179	'POSITION',
180	'POST_EVENT',
181	'PRECISION',
182	'PRIMARY',
183	'PROCEDURE',
184	'RDB$DB_KEY',
185	'RDB$RECORD_VERSION',
186	'REAL',
187	'RECORD_VERSION',
188	'RECREATE',
189	'RECURSIVE',
190	'REFERENCES',
191	'REGR_AVGX',
192	'REGR_AVGY',
193	'REGR_COUNT',
194	'REGR_INTERCEPT',
195	'REGR_R2',
196	'REGR_SLOPE',
197	'REGR_SXX',
198	'REGR_SXY',
199	'REGR_SYY',
200	'RELEASE',
201	'RETURN',
202	'RETURNING_VALUES',
203	'RETURNS',
204	'REVOKE',
205	'RIGHT',
206	'ROLLBACK',
207	'ROW',
208	'ROW_COUNT',
209	'ROWS',
210	'SAVEPOINT',
211	'SCROLL',
212	'SECOND',
213	'SELECT',
214	'SENSITIVE',
215	'SET',
216	'SIMILAR',
217	'SMALLINT',
218	'SOME',
219	'SQLCODE',
220	'SQLSTATE',
221	'SQLSTATE',
222	'START',
223	'STDDEV_POP',
224	'STDDEV_SAMP',
225	'SUM',
226	'TABLE',
227	'THEN',
228	'TIME',
229	'TIMESTAMP',
230	'TO',
231	'TRAILING',
232	'TRIGGER',
233	'TRIM',
234	'TRUE',
235	'UNION',
236	'UNIQUE',
237	'UNKNOWN',
238	'UPDATE',
239	'UPDATING',
240	'UPPER',
241	'USER',
242	'USING',
243	'VALUE',
244	'VALUES',
245	'VAR_POP',
246	'VAR_SAMP',
247	'VARCHAR',
248	'VARIABLE',
249	'VARYING',
250	'VIEW',
251	'WHEN',
252	'WHERE',
253	'WHILE',
254	'WITH',
255	'YEAR'
256	);
257
258	function Max(n1, n2: Integer): Integer;
259	function Min(n1, n2: Integer): Integer;
260	function RandomString(iLength: Integer): AnsiString;
261	function RandomInteger(iLow, iHigh: Integer): Integer;
262	function StripString(st: AnsiString; CharsToStrip: AnsiString): AnsiString;
263	function ExtractIdentifier(Dialect: Integer; Value: AnsiString): AnsiString;
264	function QuoteIdentifier(Dialect: Integer; Value: AnsiString): AnsiString;
265	function QuoteIdentifierIfNeeded(Dialect: Integer; Value: AnsiString): AnsiString;
266	function Space2Underscore(s: AnsiString): AnsiString;
267	function SQLSafeString(const s: AnsiString): AnsiString;
268	function IsSQLIdentifier(Value: AnsiString): boolean;
269	function ExtractConnectString(const CreateSQL: AnsiString; var ConnectString: AnsiString): boolean;
270
271	implementation
272
273	{$IFDEF HASREQEX}
274	uses RegExpr;
275	{$ENDIF}
276
277	function Max(n1, n2: Integer): Integer;
278	begin
279	if (n1 > n2) then
280	result := n1
281	else
282	result := n2;
283	end;
284
285	function Min(n1, n2: Integer): Integer;
286	begin
287	if (n1 < n2) then
288	result := n1
289	else
290	result := n2;
291	end;
292
293	function RandomString(iLength: Integer): AnsiString;
294	begin
295	result := '';
296	while Length(result) < iLength do
297	result := result + IntToStr(RandomInteger(0, High(Integer)));
298	if Length(result) > iLength then
299	result := Copy(result, 1, iLength);
300	end;
301
302	function RandomInteger(iLow, iHigh: Integer): Integer;
303	begin
304	result := Trunc(Random(iHigh - iLow)) + iLow;
305	end;
306
307	function StripString(st: AnsiString; CharsToStrip: AnsiString): AnsiString;
308	var
309	i: Integer;
310	begin
311	result := '';
312	for i := 1 to Length(st) do begin
313	if AnsiPos(st[i], CharsToStrip) = 0 then
314	result := result + st[i];
315	end;
316	end;
317
318	{Extracts SQL Identifier typically from a Dialect 3 encoding}
319
320	function ExtractIdentifier(Dialect: Integer; Value: AnsiString): AnsiString;
321	begin
322	Value := Trim(Value);
323	if Dialect = 1 then
324	Value := AnsiUpperCase(Value)
325	else
326	begin
327	if (Value <> '') and (Value[1] = '"') then
328	begin
329	Delete(Value, 1, 1);
330	Delete(Value, Length(Value), 1);
331	Value := StringReplace (Value, '""', '"', [rfReplaceAll]);
332	end
333	else
334	Value := AnsiUpperCase(Value);
335	end;
336	Result := Value;
337	end;
338
339	{Returns true if "w" is a Firebird SQL reserved word}
340
341	function IsReservedWord(w: AnsiString): boolean;
342	var i: integer;
343	begin
344	Result := true;
345	for i := 0 to Length(sqlReservedWords) - 1 do
346	if w = sqlReservedWords[i] then
347	Exit;
348	Result := false;
349	end;
350
351	{Format an SQL Identifier according to SQL Dialect}
352
353	function QuoteIdentifier(Dialect: Integer; Value: AnsiString): AnsiString;
354	begin
355	if Dialect = 1 then
356	Value := AnsiUpperCase(Trim(Value))
357	else
358	Value := '"' + StringReplace (Value, '""', '"', [rfReplaceAll]) + '"';
359	Result := Value;
360	end;
361
362	const
363	ValidSQLIdentifierChars = ['A'..'Z','a'..'z','0'..'9','_','$'];
364
365	{Returns true if the value is a valid SQL Identifier - note lower case accepted}
366
367	function IsSQLIdentifier(Value: AnsiString): boolean;
368	var i: integer;
369	begin
370	Result := false;
371	for i := 1 to Length(Value) do
372	if not (Value[i] in ValidSQLIdentifierChars) then Exit;
373	Result := true;
374	end;
375
376	{Extracts the Database Connect string from a Create Database Statement}
377
378	{$IFDEF HASREQEX}
379	function ExtractConnectString(const CreateSQL: AnsiString;
380	var ConnectString: AnsiString): boolean;
381	var RegexObj: TRegExpr;
382	begin
383	RegexObj := TRegExpr.Create;
384	try
385	{extact database file spec}
386	RegexObj.ModifierG := false; {turn off greedy matches}
387	RegexObj.ModifierI := true; {case insensitive match}
388	RegexObj.Expression := '^ CREATE +(DATABASE\|SCHEMA) +''(.)''';
389	Result := RegexObj.Exec(CreateSQL);
390	if Result then
391	ConnectString := system.copy(CreateSQL,RegexObj.MatchPos[2],RegexObj.MatchLen[2]);
392	finally
393	RegexObj.Free;
394	end;
395	end;
396	{$ELSE}
397	{cruder version of above for old versions of Delphi}
398	function ExtractConnectString(const CreateSQL: AnsiString;
399	var ConnectString: AnsiString): boolean;
400	var i: integer;
401	begin
402	Result := false;
403	i := Pos('''',CreateSQL);
404	if i > 0 then
405	begin
406	ConnectString := CreateSQL;
407	delete(ConnectString,1,i);
408	i := Pos('''',ConnectString);
409	if i > 0 then
410	begin
411	delete(ConnectString,i,Length(ConnectString)-i+1);
412	Result := true;
413	end;
414	end;
415	end;
416	{$ENDIF}
417
418	{Format an SQL Identifier according to SQL Dialect with encapsulation if necessary}
419
420	function QuoteIdentifierIfNeeded(Dialect: Integer; Value: AnsiString): AnsiString;
421	begin
422	if (Dialect = 3) and
423	(IsReservedWord(Value) or not IsSQLIdentifier(Value) or (AnsiUpperCase(Value) <> Value)) then
424	Result := '"' + StringReplace (TrimRight(Value), '"', '""', [rfReplaceAll]) + '"'
425	else
426	Result := Value
427	end;
428
429	{Replaces unknown characters in a string with underscores}
430
431	function Space2Underscore(s: AnsiString): AnsiString;
432	var
433	k: integer;
434	begin
435	Result := s;
436	for k := 1 to Length(s) do
437	if not (Result[k] in ValidSQLIdentifierChars) then
438	Result[k] := '_';
439	end;
440
441	{Reformats an SQL string with single quotes duplicated.}
442
443	function SQLSafeString(const s: AnsiString): AnsiString;
444	begin
445	Result := StringReplace(s,'''','''''',[rfReplaceAll]);
446	end;
447
448	end.