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Comparing ibx/trunk/fbintf/IBUtils.pas (file contents):
Revision 45 by tony, Tue Dec 6 10:33:46 2016 UTC vs.
Revision 121 by tony, Mon Jan 22 13:58:23 2018 UTC

#	Line 32 | Line 32
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
44	<	{$IFDEF WINDOWS }
45	<	Windows,
46	<	{$ELSE}
47	<	unix,
48	<	{$ENDIF}
49	<	Classes, SysUtils;
48	>	uses Classes, SysUtils;
49
50		const
51		CRLF = #13 + #10;
#	Line 55 | Line 54 | const
54		TAB  = #9;
55		NULL_TERMINATOR = #0;
56
57	<	sqlReservedWords: array [0..166] of string = (
58	<	'ADD','ADMIN','ALL','ALTER','AND','ANY','AS','AT','AVG','BEGIN','BETWEEN','BIGINT','BIT_LENGTH','BLOB','BOTH',
59	<	'BY','CASE','CAST','CHAR','CHAR_LENGTH','CHARACTER','CHARACTER_LENGTH','CHECK','CLOSE','COLLATE','COLUMN',
60	<	'COMMIT','CONNECT','CONSTRAINT','COUNT','CREATE','CROSS','CURRENT','CURRENT_CONNECTION','CURRENT_DATE',
61	<	'CURRENT_ROLE','CURRENT_TIME','CURRENT_TIMESTAMP','CURRENT_TRANSACTION','CURRENT_USER','CURSOR','DATE',
62	<	'DAY','DEC','DECIMAL','DECLARE','DEFAULT','DELETE','DISCONNECT','DISTINCT','DOUBLE','DROP','ELSE','END',
63	<	'ESCAPE','EXECUTE','EXISTS','EXTERNAL','EXTRACT','FETCH','FILTER','FLOAT','FOR','FOREIGN','FROM','FULL',
64	<	'FUNCTION','GDSCODE','GLOBAL','GRANT','GROUP','HAVING','HOUR','IN','INDEX','INNER','INSENSITIVE','INSERT',
65	<	'INT','INTEGER','INTO','IS','JOIN','LEADING','LEFT','LIKE','LONG','LOWER','MAX','MAXIMUM_SEGMENT','MERGE',
66	<	'MIN','MINUTE','MONTH','NATIONAL','NATURAL','NCHAR','NO','NOT','NULL','NUMERIC','OCTET_LENGTH','OF','ON',
67	<	'ONLY','OPEN','OR','ORDER','OUTER','PARAMETER','PLAN','POSITION','POST_EVENT','PRECISION','PRIMARY',
68	<	'PROCEDURE','RDB$DB_KEY','REAL','RECORD_VERSION','RECREATE','RECURSIVE','REFERENCES','RELEASE','RETURNING_VALUES',
69	<	'RETURNS','REVOKE','RIGHT','ROLLBACK','ROW_COUNT','ROWS','SAVEPOINT','SECOND','SELECT','SENSITIVE',
70	<	'SET','SIMILAR','SMALLINT','SOME','SQLCODE','SQLSTATE','START','SUM','TABLE','THEN','TIME',
71	<	'TIMESTAMP','TO','TRAILING','TRIGGER','TRIM','UNION','UNIQUE','UPDATE','UPPER','USER','USING',
72	<	'VALUE','VALUES','VARCHAR','VARIABLE','VARYING','VIEW','WHEN','WHERE','WHILE','WITH','YEAR');
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): String;
260	>	function RandomString(iLength: Integer): AnsiString;
261		function RandomInteger(iLow, iHigh: Integer): Integer;
262	<	function StripString(st: String; CharsToStrip: String): String;
263	<	function FormatIdentifier(Dialect: Integer; Value: String): String;
264	<	function FormatIdentifierValue(Dialect: Integer; Value: String): String;
265	<	function FormatIdentifierValueNC(Dialect: Integer; Value: String): String;
266	<	function ExtractIdentifier(Dialect: Integer; Value: String): String;
267	<	function QuoteIdentifier(Dialect: Integer; Value: String): String;
268	<	function QuoteIdentifierIfNeeded(Dialect: Integer; Value: String): String;
269	<	function Space2Underscore(s: string): string;
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
#	Line 103 | Line 290 | begin
290		result := n2;
291		end;
292
293	<	function RandomString(iLength: Integer): String;
293	>	function RandomString(iLength: Integer): AnsiString;
294		begin
295		result := '';
296		while Length(result) < iLength do
#	Line 117 | Line 304 | begin
304		result := Trunc(Random(iHigh - iLow)) + iLow;
305		end;
306
307	<	function StripString(st: String; CharsToStrip: String): String;
307	>	function StripString(st: AnsiString; CharsToStrip: AnsiString): AnsiString;
308		var
309		i: Integer;
310		begin
#	Line 128 | Line 315 | begin
315		end;
316		end;
317
318	<	function FormatIdentifier(Dialect: Integer; Value: String): String;
132	<	begin
133	<	Value := Trim(Value);
134	<	if Dialect = 1 then
135	<	Value := AnsiUpperCase(Value)
136	<	else
137	<	if (Value <> '') and (Value[1] = '"') then
138	<	Value := '"' + StringReplace (TrimRight(Value), '"', '""', [rfReplaceAll]) + '"'
139	<	else
140	<	Value := AnsiUpperCase(Value);
141	<	Result := Value;
142	<	end;
318	>	{Extracts SQL Identifier typically from a  Dialect 3 encoding}
319
320	<	function FormatIdentifierValue(Dialect: Integer; Value: String): String;
320	>	function ExtractIdentifier(Dialect: Integer; Value: AnsiString): AnsiString;
321		begin
322		Value := Trim(Value);
323		if Dialect = 1 then
#	Line 160 | Line 336 | begin
336		Result := Value;
337		end;
338
339	<	function FormatIdentifierValueNC(Dialect: Integer; Value: String): String;
164	<	begin
165	<	Value := Trim(Value);
166	<	if Dialect = 1 then
167	<	Value := AnsiUpperCase(Value)
168	<	else
169	<	begin
170	<	if (Value <> '') and (Value[1] = '"') then
171	<	begin
172	<	Delete(Value, 1, 1);
173	<	Delete(Value, Length(Value), 1);
174	<	Value := AnsiUpperCase(StringReplace (Value, '""', '"', [rfReplaceAll]));
175	<	end
176	<	else
177	<	Value := AnsiUpperCase(Value);
178	<	end;
179	<	Result := Value;
180	<	end;
339	>	{Returns true if "w" is a Firebird SQL reserved word}
340
341	<	function ExtractIdentifier(Dialect: Integer; Value: String): String;
183	<	begin
184	<	Value := Trim(Value);
185	<	if Dialect = 1 then
186	<	Value := AnsiUpperCase(Value)
187	<	else
188	<	begin
189	<	if (Value <> '') and (Value[1] = '"') then
190	<	begin
191	<	Delete(Value, 1, 1);
192	<	Delete(Value, Length(Value), 1);
193	<	Value := StringReplace (Value, '""', '"', [rfReplaceAll]);
194	<	end
195	<	else
196	<	Value := AnsiUpperCase(Value);
197	<	end;
198	<	Result := Value;
199	<	end;
200	<
201	<	function IsReservedWord(w: string): boolean;
341	>	function IsReservedWord(w: AnsiString): boolean;
342		var i: integer;
343		begin
344		Result := true;
#	Line 208 | Line 348 | begin
348		Result := false;
349		end;
350
351	<	function QuoteIdentifier(Dialect: Integer; Value: String): String;
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 := '"' + Value + '"';
358	>	Value := '"' + StringReplace (Value, '""', '"', [rfReplaceAll]) + '"';
359		Result := Value;
360		end;
361
362	<	function QuoteIdentifierIfNeeded(Dialect: Integer; Value: String): String;
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	>	{$ELSE}
397	>	{cruder version of above for Delphi. Older versions lack regular expression
398	>	handling.}
399	>	function ExtractConnectString(const CreateSQL: AnsiString;
400	>	var ConnectString: AnsiString): boolean;
401	>	var i: integer;
402	>	begin
403	>	Result := false;
404	>	i := Pos('''',CreateSQL);
405	>	if i > 0 then
406	>	begin
407	>	ConnectString := CreateSQL;
408	>	delete(ConnectString,1,i);
409	>	i := Pos('''',ConnectString);
410	>	if i > 0 then
411	>	begin
412	>	delete(ConnectString,i,Length(ConnectString)-i+1);
413	>	Result := true;
414	>	end;
415	>	end;
416	>	end;
417	>	{$ENDIF}
418	>
419	>	{Format an SQL Identifier according to SQL Dialect with encapsulation if necessary}
420	>
421	>	function QuoteIdentifierIfNeeded(Dialect: Integer; Value: AnsiString): AnsiString;
422		begin
423		if (Dialect = 3) and
424	<	((AnsiUpperCase(Value) <> Value) or IsReservedWord(Value)) then
425	<	Result := '"' + Value + '"'
424	>	(IsReservedWord(Value) or not IsSQLIdentifier(Value) or (AnsiUpperCase(Value) <> Value)) then
425	>	Result := '"' + StringReplace (TrimRight(Value), '"', '""', [rfReplaceAll]) + '"'
426		else
427		Result := Value
428		end;
429
430	<	function Space2Underscore(s: string): string;
430	>	{Replaces unknown characters in a string with underscores}
431	>
432	>	function Space2Underscore(s: AnsiString): AnsiString;
433		var
434		k: integer;
435		begin
436		Result := s;
437		for k := 1 to Length(s) do
438	<	if not (Result[k] in ['0'..'9','A'..'Z','_','$'])  then
438	>	if not (Result[k] in ValidSQLIdentifierChars)  then
439		Result[k] := '_';
440		end;
441
442	+	{Reformats an SQL string with single quotes duplicated.}
443	+
444	+	function SQLSafeString(const s: AnsiString): AnsiString;
445	+	begin
446	+	Result := StringReplace(s,'''','''''',[rfReplaceAll]);
447	+	end;
448
449		end.

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