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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 119 by tony, Mon Jan 22 13:58:18 2018 UTC

#	Line 32 | Line 32
32		{************************************************************************}
33
34		unit IBUtils;
35	+	{$IFDEF MSWINDOWS}
36	+	{$DEFINE WINDOWS}
37	+	{$IF defined(CompilerVersion) and (CompilerVersion >= 28)}
38	+	{Delphi XE7 onwards}}
39	+	{$define HASREQEX}
40	+	{$IFEND}
41	+	{$ENDIF}
42
43		{$IFDEF FPC}
44		{$Mode Delphi}
45		{$codepage UTF8}
46	+	{$define HASREQEX}
47		{$ENDIF}
48
49	+
50		interface
51
52	<	uses
44	<	{$IFDEF WINDOWS }
45	<	Windows,
46	<	{$ELSE}
47	<	unix,
48	<	{$ENDIF}
49	<	Classes, SysUtils;
52	>	uses Classes, SysUtils;
53
54		const
55		CRLF = #13 + #10;
#	Line 55 | Line 58 | const
58		TAB  = #9;
59		NULL_TERMINATOR = #0;
60
61	<	sqlReservedWords: array [0..166] of string = (
62	<	'ADD','ADMIN','ALL','ALTER','AND','ANY','AS','AT','AVG','BEGIN','BETWEEN','BIGINT','BIT_LENGTH','BLOB','BOTH',
63	<	'BY','CASE','CAST','CHAR','CHAR_LENGTH','CHARACTER','CHARACTER_LENGTH','CHECK','CLOSE','COLLATE','COLUMN',
64	<	'COMMIT','CONNECT','CONSTRAINT','COUNT','CREATE','CROSS','CURRENT','CURRENT_CONNECTION','CURRENT_DATE',
65	<	'CURRENT_ROLE','CURRENT_TIME','CURRENT_TIMESTAMP','CURRENT_TRANSACTION','CURRENT_USER','CURSOR','DATE',
66	<	'DAY','DEC','DECIMAL','DECLARE','DEFAULT','DELETE','DISCONNECT','DISTINCT','DOUBLE','DROP','ELSE','END',
67	<	'ESCAPE','EXECUTE','EXISTS','EXTERNAL','EXTRACT','FETCH','FILTER','FLOAT','FOR','FOREIGN','FROM','FULL',
68	<	'FUNCTION','GDSCODE','GLOBAL','GRANT','GROUP','HAVING','HOUR','IN','INDEX','INNER','INSENSITIVE','INSERT',
69	<	'INT','INTEGER','INTO','IS','JOIN','LEADING','LEFT','LIKE','LONG','LOWER','MAX','MAXIMUM_SEGMENT','MERGE',
70	<	'MIN','MINUTE','MONTH','NATIONAL','NATURAL','NCHAR','NO','NOT','NULL','NUMERIC','OCTET_LENGTH','OF','ON',
71	<	'ONLY','OPEN','OR','ORDER','OUTER','PARAMETER','PLAN','POSITION','POST_EVENT','PRECISION','PRIMARY',
72	<	'PROCEDURE','RDB$DB_KEY','REAL','RECORD_VERSION','RECREATE','RECURSIVE','REFERENCES','RELEASE','RETURNING_VALUES',
73	<	'RETURNS','REVOKE','RIGHT','ROLLBACK','ROW_COUNT','ROWS','SAVEPOINT','SECOND','SELECT','SENSITIVE',
74	<	'SET','SIMILAR','SMALLINT','SOME','SQLCODE','SQLSTATE','START','SUM','TABLE','THEN','TIME',
75	<	'TIMESTAMP','TO','TRAILING','TRIGGER','TRIM','UNION','UNIQUE','UPDATE','UPPER','USER','USING',
76	<	'VALUE','VALUES','VARCHAR','VARIABLE','VARYING','VIEW','WHEN','WHERE','WHILE','WITH','YEAR');
61	>	sqlReservedWords: array [0..197] of string = (
62	>	'ADD',
63	>	'ADMIN',
64	>	'ALL',
65	>	'ALTER',
66	>	'AND',
67	>	'ANY',
68	>	'AS',
69	>	'AT',
70	>	'AVG',
71	>	'BEGIN',
72	>	'BETWEEN',
73	>	'BIGINT',
74	>	'BIT_LENGTH',
75	>	'BLOB',
76	>	'BOOLEAN',
77	>	'BOTH',
78	>	'BY',
79	>	'CASE',
80	>	'CAST',
81	>	'CHAR',
82	>	'CHAR_LENGTH',
83	>	'CHARACTER',
84	>	'CHARACTER_LENGTH',
85	>	'CHECK',
86	>	'CLOSE',
87	>	'COLLATE',
88	>	'COLUMN',
89	>	'COMMIT',
90	>	'CONNECT',
91	>	'CONSTRAINT',
92	>	'CORR',
93	>	'COUNT',
94	>	'COVAR_POP',
95	>	'COVAR_SAMP',
96	>	'CREATE',
97	>	'CROSS',
98	>	'CURRENT',
99	>	'CURRENT_CONNECTION',
100	>	'CURRENT_DATE',
101	>	'CURRENT_ROLE',
102	>	'CURRENT_TIME',
103	>	'CURRENT_TIMESTAMP',
104	>	'CURRENT_TRANSACTION',
105	>	'CURRENT_USER',
106	>	'CURSOR',
107	>	'DATE',
108	>	'DAY',
109	>	'DEC',
110	>	'DECIMAL',
111	>	'DECLARE',
112	>	'DEFAULT',
113	>	'DELETE',
114	>	'DELETING',
115	>	'DETERMINISTIC',
116	>	'DISCONNECT',
117	>	'DISTINCT',
118	>	'DOUBLE',
119	>	'DROP',
120	>	'ELSE',
121	>	'END',
122	>	'ESCAPE',
123	>	'EXECUTE',
124	>	'EXISTS',
125	>	'EXTERNAL',
126	>	'EXTRACT',
127	>	'FALSE',
128	>	'FETCH',
129	>	'FILTER',
130	>	'FLOAT',
131	>	'FOR',
132	>	'FOREIGN',
133	>	'FROM',
134	>	'FULL',
135	>	'FUNCTION',
136	>	'GDSCODE',
137	>	'GLOBAL',
138	>	'GRANT',
139	>	'GROUP',
140	>	'HAVING',
141	>	'HOUR',
142	>	'IN',
143	>	'INDEX',
144	>	'INNER',
145	>	'INSENSITIVE',
146	>	'INSERT',
147	>	'INSERTING',
148	>	'INT',
149	>	'INTEGER',
150	>	'INTO',
151	>	'IS',
152	>	'JOIN',
153	>	'LEADING',
154	>	'LEFT',
155	>	'LIKE',
156	>	'LONG',
157	>	'LOWER',
158	>	'MAX',
159	>	'MAXIMUM_SEGMENT',
160	>	'MERGE',
161	>	'MIN',
162	>	'MINUTE',
163	>	'MONTH',
164	>	'NATIONAL',
165	>	'NATURAL',
166	>	'NCHAR',
167	>	'NO',
168	>	'NOT',
169	>	'NULL',
170	>	'NUMERIC',
171	>	'OCTET_LENGTH',
172	>	'OF',
173	>	'OFFSET',
174	>	'ON',
175	>	'ONLY',
176	>	'OPEN',
177	>	'OR',
178	>	'ORDER',
179	>	'OUTER',
180	>	'OVER',
181	>	'PARAMETER',
182	>	'PLAN',
183	>	'POSITION',
184	>	'POST_EVENT',
185	>	'PRECISION',
186	>	'PRIMARY',
187	>	'PROCEDURE',
188	>	'RDB$DB_KEY',
189	>	'RDB$RECORD_VERSION',
190	>	'REAL',
191	>	'RECORD_VERSION',
192	>	'RECREATE',
193	>	'RECURSIVE',
194	>	'REFERENCES',
195	>	'REGR_AVGX',
196	>	'REGR_AVGY',
197	>	'REGR_COUNT',
198	>	'REGR_INTERCEPT',
199	>	'REGR_R2',
200	>	'REGR_SLOPE',
201	>	'REGR_SXX',
202	>	'REGR_SXY',
203	>	'REGR_SYY',
204	>	'RELEASE',
205	>	'RETURN',
206	>	'RETURNING_VALUES',
207	>	'RETURNS',
208	>	'REVOKE',
209	>	'RIGHT',
210	>	'ROLLBACK',
211	>	'ROW',
212	>	'ROW_COUNT',
213	>	'ROWS',
214	>	'SAVEPOINT',
215	>	'SCROLL',
216	>	'SECOND',
217	>	'SELECT',
218	>	'SENSITIVE',
219	>	'SET',
220	>	'SIMILAR',
221	>	'SMALLINT',
222	>	'SOME',
223	>	'SQLCODE',
224	>	'SQLSTATE',
225	>	'SQLSTATE',
226	>	'START',
227	>	'STDDEV_POP',
228	>	'STDDEV_SAMP',
229	>	'SUM',
230	>	'TABLE',
231	>	'THEN',
232	>	'TIME',
233	>	'TIMESTAMP',
234	>	'TO',
235	>	'TRAILING',
236	>	'TRIGGER',
237	>	'TRIM',
238	>	'TRUE',
239	>	'UNION',
240	>	'UNIQUE',
241	>	'UNKNOWN',
242	>	'UPDATE',
243	>	'UPDATING',
244	>	'UPPER',
245	>	'USER',
246	>	'USING',
247	>	'VALUE',
248	>	'VALUES',
249	>	'VAR_POP',
250	>	'VAR_SAMP',
251	>	'VARCHAR',
252	>	'VARIABLE',
253	>	'VARYING',
254	>	'VIEW',
255	>	'WHEN',
256	>	'WHERE',
257	>	'WHILE',
258	>	'WITH',
259	>	'YEAR'
260	>	);
261
262		function Max(n1, n2: Integer): Integer;
263		function Min(n1, n2: Integer): Integer;
264	<	function RandomString(iLength: Integer): String;
264	>	function RandomString(iLength: Integer): AnsiString;
265		function RandomInteger(iLow, iHigh: Integer): Integer;
266	<	function StripString(st: String; CharsToStrip: String): String;
267	<	function FormatIdentifier(Dialect: Integer; Value: String): String;
268	<	function FormatIdentifierValue(Dialect: Integer; Value: String): String;
269	<	function FormatIdentifierValueNC(Dialect: Integer; Value: String): String;
270	<	function ExtractIdentifier(Dialect: Integer; Value: String): String;
271	<	function QuoteIdentifier(Dialect: Integer; Value: String): String;
272	<	function QuoteIdentifierIfNeeded(Dialect: Integer; Value: String): String;
273	<	function Space2Underscore(s: string): string;
266	>	function StripString(st: AnsiString; CharsToStrip: AnsiString): AnsiString;
267	>	function ExtractIdentifier(Dialect: Integer; Value: AnsiString): AnsiString;
268	>	function QuoteIdentifier(Dialect: Integer; Value: AnsiString): AnsiString;
269	>	function QuoteIdentifierIfNeeded(Dialect: Integer; Value: AnsiString): AnsiString;
270	>	function Space2Underscore(s: AnsiString): AnsiString;
271	>	function SQLSafeString(const s: AnsiString): AnsiString;
272	>	function IsSQLIdentifier(Value: AnsiString): boolean;
273	>	function ExtractConnectString(const CreateSQL: AnsiString; var ConnectString: AnsiString): boolean;
274
275		implementation
276
277	+	{$IFDEF HASREQEX}
278	+	uses RegExpr;
279	+	{$ENDIF}
280	+
281		function Max(n1, n2: Integer): Integer;
282		begin
283		if (n1 > n2) then
#	Line 103 | Line 294 | begin
294		result := n2;
295		end;
296
297	<	function RandomString(iLength: Integer): String;
297	>	function RandomString(iLength: Integer): AnsiString;
298		begin
299		result := '';
300		while Length(result) < iLength do
#	Line 117 | Line 308 | begin
308		result := Trunc(Random(iHigh - iLow)) + iLow;
309		end;
310
311	<	function StripString(st: String; CharsToStrip: String): String;
311	>	function StripString(st: AnsiString; CharsToStrip: AnsiString): AnsiString;
312		var
313		i: Integer;
314		begin
#	Line 128 | Line 319 | begin
319		end;
320		end;
321
322	<	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;
322	>	{Extracts SQL Identifier typically from a  Dialect 3 encoding}
323
324	<	function FormatIdentifierValue(Dialect: Integer; Value: String): String;
324	>	function ExtractIdentifier(Dialect: Integer; Value: AnsiString): AnsiString;
325		begin
326		Value := Trim(Value);
327		if Dialect = 1 then
#	Line 160 | Line 340 | begin
340		Result := Value;
341		end;
342
343	<	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;
343	>	{Returns true if "w" is a Firebird SQL reserved word}
344
345	<	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;
345	>	function IsReservedWord(w: AnsiString): boolean;
346		var i: integer;
347		begin
348		Result := true;
#	Line 208 | Line 352 | begin
352		Result := false;
353		end;
354
355	<	function QuoteIdentifier(Dialect: Integer; Value: String): String;
355	>	{Format an SQL Identifier according to SQL Dialect}
356	>
357	>	function QuoteIdentifier(Dialect: Integer; Value: AnsiString): AnsiString;
358		begin
359		if Dialect = 1 then
360		Value := AnsiUpperCase(Trim(Value))
361		else
362	<	Value := '"' + Value + '"';
362	>	Value := '"' + StringReplace (Value, '""', '"', [rfReplaceAll]) + '"';
363		Result := Value;
364		end;
365
366	<	function QuoteIdentifierIfNeeded(Dialect: Integer; Value: String): String;
366	>	const
367	>	ValidSQLIdentifierChars = ['A'..'Z','a'..'z','0'..'9','_','$'];
368	>
369	>	{Returns true if the value is a valid SQL Identifier - note lower case accepted}
370	>
371	>	function IsSQLIdentifier(Value: AnsiString): boolean;
372	>	var i: integer;
373	>	begin
374	>	Result := false;
375	>	for i := 1 to Length(Value) do
376	>	if not (Value[i] in ValidSQLIdentifierChars) then Exit;
377	>	Result := true;
378	>	end;
379	>
380	>	{Extracts the Database Connect string from a Create Database Statement}
381	>
382	>	{$IFDEF HASREQEX}
383	>	function ExtractConnectString(const CreateSQL: AnsiString;
384	>	var ConnectString: AnsiString): boolean;
385	>	var RegexObj: TRegExpr;
386	>	begin
387	>	RegexObj := TRegExpr.Create;
388	>	try
389	>	{extact database file spec}
390	>	RegexObj.ModifierG := false; {turn off greedy matches}
391	>	RegexObj.ModifierI := true; {case insensitive match}
392	>	RegexObj.Expression := '^ *CREATE +(DATABASE|SCHEMA) +''(.*)''';
393	>	Result := RegexObj.Exec(CreateSQL);
394	>	if Result then
395	>	ConnectString := system.copy(CreateSQL,RegexObj.MatchPos[2],RegexObj.MatchLen[2]);
396	>	finally
397	>	RegexObj.Free;
398	>	end;
399	>	end;
400	>	{$ELSE}
401	>	{cruder version of above for old versions of Delphi}
402	>	function ExtractConnectString(const CreateSQL: AnsiString;
403	>	var ConnectString: AnsiString): boolean;
404	>	var i: integer;
405	>	begin
406	>	Result := false;
407	>	i := Pos('''',CreateSQL);
408	>	if i > 0 then
409	>	begin
410	>	ConnectString := CreateSQL;
411	>	delete(ConnectString,1,i);
412	>	i := Pos('''',ConnectString);
413	>	if i > 0 then
414	>	begin
415	>	delete(ConnectString,i,Length(ConnectString)-i+1);
416	>	Result := true;
417	>	end;
418	>	end;
419	>	end;
420	>	{$ENDIF}
421	>
422	>	{Format an SQL Identifier according to SQL Dialect with encapsulation if necessary}
423	>
424	>	function QuoteIdentifierIfNeeded(Dialect: Integer; Value: AnsiString): AnsiString;
425		begin
426		if (Dialect = 3) and
427	<	((AnsiUpperCase(Value) <> Value) or IsReservedWord(Value)) then
428	<	Result := '"' + Value + '"'
427	>	(IsReservedWord(Value) or not IsSQLIdentifier(Value) or (AnsiUpperCase(Value) <> Value)) then
428	>	Result := '"' + StringReplace (TrimRight(Value), '"', '""', [rfReplaceAll]) + '"'
429		else
430		Result := Value
431		end;
432
433	<	function Space2Underscore(s: string): string;
433	>	{Replaces unknown characters in a string with underscores}
434	>
435	>	function Space2Underscore(s: AnsiString): AnsiString;
436		var
437		k: integer;
438		begin
439		Result := s;
440		for k := 1 to Length(s) do
441	<	if not (Result[k] in ['0'..'9','A'..'Z','_','$'])  then
441	>	if not (Result[k] in ValidSQLIdentifierChars)  then
442		Result[k] := '_';
443		end;
444
445	+	{Reformats an SQL string with single quotes duplicated.}
446	+
447	+	function SQLSafeString(const s: AnsiString): AnsiString;
448	+	begin
449	+	Result := StringReplace(s,'''','''''',[rfReplaceAll]);
450	+	end;
451
452		end.

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