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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 117 by tony, Mon Jan 22 13:58:11 2018 UTC

#	Line 32 | Line 32
32		{************************************************************************}
33
34		unit IBUtils;
35	+	{$IFDEF MSWINDOWS}
36	+	{$DEFINE WINDOWS}
37	+	{$ENDIF}
38
39		{$IFDEF FPC}
40		{$Mode Delphi}
#	Line 40 | Line 43 | unit IBUtils;
43
44		interface
45
46	<	uses
44	<	{$IFDEF WINDOWS }
45	<	Windows,
46	<	{$ELSE}
47	<	unix,
48	<	{$ENDIF}
49	<	Classes, SysUtils;
46	>	uses Classes, SysUtils;
47
48		const
49		CRLF = #13 + #10;
#	Line 55 | Line 52 | const
52		TAB  = #9;
53		NULL_TERMINATOR = #0;
54
55	<	sqlReservedWords: array [0..166] of string = (
56	<	'ADD','ADMIN','ALL','ALTER','AND','ANY','AS','AT','AVG','BEGIN','BETWEEN','BIGINT','BIT_LENGTH','BLOB','BOTH',
57	<	'BY','CASE','CAST','CHAR','CHAR_LENGTH','CHARACTER','CHARACTER_LENGTH','CHECK','CLOSE','COLLATE','COLUMN',
58	<	'COMMIT','CONNECT','CONSTRAINT','COUNT','CREATE','CROSS','CURRENT','CURRENT_CONNECTION','CURRENT_DATE',
59	<	'CURRENT_ROLE','CURRENT_TIME','CURRENT_TIMESTAMP','CURRENT_TRANSACTION','CURRENT_USER','CURSOR','DATE',
60	<	'DAY','DEC','DECIMAL','DECLARE','DEFAULT','DELETE','DISCONNECT','DISTINCT','DOUBLE','DROP','ELSE','END',
61	<	'ESCAPE','EXECUTE','EXISTS','EXTERNAL','EXTRACT','FETCH','FILTER','FLOAT','FOR','FOREIGN','FROM','FULL',
62	<	'FUNCTION','GDSCODE','GLOBAL','GRANT','GROUP','HAVING','HOUR','IN','INDEX','INNER','INSENSITIVE','INSERT',
63	<	'INT','INTEGER','INTO','IS','JOIN','LEADING','LEFT','LIKE','LONG','LOWER','MAX','MAXIMUM_SEGMENT','MERGE',
64	<	'MIN','MINUTE','MONTH','NATIONAL','NATURAL','NCHAR','NO','NOT','NULL','NUMERIC','OCTET_LENGTH','OF','ON',
65	<	'ONLY','OPEN','OR','ORDER','OUTER','PARAMETER','PLAN','POSITION','POST_EVENT','PRECISION','PRIMARY',
66	<	'PROCEDURE','RDB$DB_KEY','REAL','RECORD_VERSION','RECREATE','RECURSIVE','REFERENCES','RELEASE','RETURNING_VALUES',
67	<	'RETURNS','REVOKE','RIGHT','ROLLBACK','ROW_COUNT','ROWS','SAVEPOINT','SECOND','SELECT','SENSITIVE',
68	<	'SET','SIMILAR','SMALLINT','SOME','SQLCODE','SQLSTATE','START','SUM','TABLE','THEN','TIME',
69	<	'TIMESTAMP','TO','TRAILING','TRIGGER','TRIM','UNION','UNIQUE','UPDATE','UPPER','USER','USING',
70	<	'VALUE','VALUES','VARCHAR','VARIABLE','VARYING','VIEW','WHEN','WHERE','WHILE','WITH','YEAR');
55	>	sqlReservedWords: array [0..197] of string = (
56	>	'ADD',
57	>	'ADMIN',
58	>	'ALL',
59	>	'ALTER',
60	>	'AND',
61	>	'ANY',
62	>	'AS',
63	>	'AT',
64	>	'AVG',
65	>	'BEGIN',
66	>	'BETWEEN',
67	>	'BIGINT',
68	>	'BIT_LENGTH',
69	>	'BLOB',
70	>	'BOOLEAN',
71	>	'BOTH',
72	>	'BY',
73	>	'CASE',
74	>	'CAST',
75	>	'CHAR',
76	>	'CHAR_LENGTH',
77	>	'CHARACTER',
78	>	'CHARACTER_LENGTH',
79	>	'CHECK',
80	>	'CLOSE',
81	>	'COLLATE',
82	>	'COLUMN',
83	>	'COMMIT',
84	>	'CONNECT',
85	>	'CONSTRAINT',
86	>	'CORR',
87	>	'COUNT',
88	>	'COVAR_POP',
89	>	'COVAR_SAMP',
90	>	'CREATE',
91	>	'CROSS',
92	>	'CURRENT',
93	>	'CURRENT_CONNECTION',
94	>	'CURRENT_DATE',
95	>	'CURRENT_ROLE',
96	>	'CURRENT_TIME',
97	>	'CURRENT_TIMESTAMP',
98	>	'CURRENT_TRANSACTION',
99	>	'CURRENT_USER',
100	>	'CURSOR',
101	>	'DATE',
102	>	'DAY',
103	>	'DEC',
104	>	'DECIMAL',
105	>	'DECLARE',
106	>	'DEFAULT',
107	>	'DELETE',
108	>	'DELETING',
109	>	'DETERMINISTIC',
110	>	'DISCONNECT',
111	>	'DISTINCT',
112	>	'DOUBLE',
113	>	'DROP',
114	>	'ELSE',
115	>	'END',
116	>	'ESCAPE',
117	>	'EXECUTE',
118	>	'EXISTS',
119	>	'EXTERNAL',
120	>	'EXTRACT',
121	>	'FALSE',
122	>	'FETCH',
123	>	'FILTER',
124	>	'FLOAT',
125	>	'FOR',
126	>	'FOREIGN',
127	>	'FROM',
128	>	'FULL',
129	>	'FUNCTION',
130	>	'GDSCODE',
131	>	'GLOBAL',
132	>	'GRANT',
133	>	'GROUP',
134	>	'HAVING',
135	>	'HOUR',
136	>	'IN',
137	>	'INDEX',
138	>	'INNER',
139	>	'INSENSITIVE',
140	>	'INSERT',
141	>	'INSERTING',
142	>	'INT',
143	>	'INTEGER',
144	>	'INTO',
145	>	'IS',
146	>	'JOIN',
147	>	'LEADING',
148	>	'LEFT',
149	>	'LIKE',
150	>	'LONG',
151	>	'LOWER',
152	>	'MAX',
153	>	'MAXIMUM_SEGMENT',
154	>	'MERGE',
155	>	'MIN',
156	>	'MINUTE',
157	>	'MONTH',
158	>	'NATIONAL',
159	>	'NATURAL',
160	>	'NCHAR',
161	>	'NO',
162	>	'NOT',
163	>	'NULL',
164	>	'NUMERIC',
165	>	'OCTET_LENGTH',
166	>	'OF',
167	>	'OFFSET',
168	>	'ON',
169	>	'ONLY',
170	>	'OPEN',
171	>	'OR',
172	>	'ORDER',
173	>	'OUTER',
174	>	'OVER',
175	>	'PARAMETER',
176	>	'PLAN',
177	>	'POSITION',
178	>	'POST_EVENT',
179	>	'PRECISION',
180	>	'PRIMARY',
181	>	'PROCEDURE',
182	>	'RDB$DB_KEY',
183	>	'RDB$RECORD_VERSION',
184	>	'REAL',
185	>	'RECORD_VERSION',
186	>	'RECREATE',
187	>	'RECURSIVE',
188	>	'REFERENCES',
189	>	'REGR_AVGX',
190	>	'REGR_AVGY',
191	>	'REGR_COUNT',
192	>	'REGR_INTERCEPT',
193	>	'REGR_R2',
194	>	'REGR_SLOPE',
195	>	'REGR_SXX',
196	>	'REGR_SXY',
197	>	'REGR_SYY',
198	>	'RELEASE',
199	>	'RETURN',
200	>	'RETURNING_VALUES',
201	>	'RETURNS',
202	>	'REVOKE',
203	>	'RIGHT',
204	>	'ROLLBACK',
205	>	'ROW',
206	>	'ROW_COUNT',
207	>	'ROWS',
208	>	'SAVEPOINT',
209	>	'SCROLL',
210	>	'SECOND',
211	>	'SELECT',
212	>	'SENSITIVE',
213	>	'SET',
214	>	'SIMILAR',
215	>	'SMALLINT',
216	>	'SOME',
217	>	'SQLCODE',
218	>	'SQLSTATE',
219	>	'SQLSTATE',
220	>	'START',
221	>	'STDDEV_POP',
222	>	'STDDEV_SAMP',
223	>	'SUM',
224	>	'TABLE',
225	>	'THEN',
226	>	'TIME',
227	>	'TIMESTAMP',
228	>	'TO',
229	>	'TRAILING',
230	>	'TRIGGER',
231	>	'TRIM',
232	>	'TRUE',
233	>	'UNION',
234	>	'UNIQUE',
235	>	'UNKNOWN',
236	>	'UPDATE',
237	>	'UPDATING',
238	>	'UPPER',
239	>	'USER',
240	>	'USING',
241	>	'VALUE',
242	>	'VALUES',
243	>	'VAR_POP',
244	>	'VAR_SAMP',
245	>	'VARCHAR',
246	>	'VARIABLE',
247	>	'VARYING',
248	>	'VIEW',
249	>	'WHEN',
250	>	'WHERE',
251	>	'WHILE',
252	>	'WITH',
253	>	'YEAR'
254	>	);
255
256		function Max(n1, n2: Integer): Integer;
257		function Min(n1, n2: Integer): Integer;
258	<	function RandomString(iLength: Integer): String;
258	>	function RandomString(iLength: Integer): AnsiString;
259		function RandomInteger(iLow, iHigh: Integer): Integer;
260	<	function StripString(st: String; CharsToStrip: String): String;
261	<	function FormatIdentifier(Dialect: Integer; Value: String): String;
262	<	function FormatIdentifierValue(Dialect: Integer; Value: String): String;
263	<	function FormatIdentifierValueNC(Dialect: Integer; Value: String): String;
264	<	function ExtractIdentifier(Dialect: Integer; Value: String): String;
265	<	function QuoteIdentifier(Dialect: Integer; Value: String): String;
266	<	function QuoteIdentifierIfNeeded(Dialect: Integer; Value: String): String;
267	<	function Space2Underscore(s: string): string;
260	>	function StripString(st: AnsiString; CharsToStrip: AnsiString): AnsiString;
261	>	function ExtractIdentifier(Dialect: Integer; Value: AnsiString): AnsiString;
262	>	function QuoteIdentifier(Dialect: Integer; Value: AnsiString): AnsiString;
263	>	function QuoteIdentifierIfNeeded(Dialect: Integer; Value: AnsiString): AnsiString;
264	>	function Space2Underscore(s: AnsiString): AnsiString;
265	>	function SQLSafeString(const s: AnsiString): AnsiString;
266	>	function IsSQLIdentifier(Value: AnsiString): boolean;
267	>	function ExtractConnectString(const CreateSQL: AnsiString; var ConnectString: AnsiString): boolean;
268
269		implementation
270
271	+	uses RegExpr;
272	+
273		function Max(n1, n2: Integer): Integer;
274		begin
275		if (n1 > n2) then
#	Line 103 | Line 286 | begin
286		result := n2;
287		end;
288
289	<	function RandomString(iLength: Integer): String;
289	>	function RandomString(iLength: Integer): AnsiString;
290		begin
291		result := '';
292		while Length(result) < iLength do
#	Line 117 | Line 300 | begin
300		result := Trunc(Random(iHigh - iLow)) + iLow;
301		end;
302
303	<	function StripString(st: String; CharsToStrip: String): String;
303	>	function StripString(st: AnsiString; CharsToStrip: AnsiString): AnsiString;
304		var
305		i: Integer;
306		begin
#	Line 128 | Line 311 | begin
311		end;
312		end;
313
314	<	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;
314	>	{Extracts SQL Identifier typically from a  Dialect 3 encoding}
315
316	<	function FormatIdentifierValue(Dialect: Integer; Value: String): String;
316	>	function ExtractIdentifier(Dialect: Integer; Value: AnsiString): AnsiString;
317		begin
318		Value := Trim(Value);
319		if Dialect = 1 then
#	Line 160 | Line 332 | begin
332		Result := Value;
333		end;
334
335	<	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;
181	<
182	<	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;
335	>	{Returns true if "w" is a Firebird SQL reserved word}
336
337	<	function IsReservedWord(w: string): boolean;
337	>	function IsReservedWord(w: AnsiString): boolean;
338		var i: integer;
339		begin
340		Result := true;
#	Line 208 | Line 344 | begin
344		Result := false;
345		end;
346
347	<	function QuoteIdentifier(Dialect: Integer; Value: String): String;
347	>	{Format an SQL Identifier according to SQL Dialect}
348	>
349	>	function QuoteIdentifier(Dialect: Integer; Value: AnsiString): AnsiString;
350		begin
351		if Dialect = 1 then
352		Value := AnsiUpperCase(Trim(Value))
353		else
354	<	Value := '"' + Value + '"';
354	>	Value := '"' + StringReplace (Value, '""', '"', [rfReplaceAll]) + '"';
355		Result := Value;
356		end;
357
358	<	function QuoteIdentifierIfNeeded(Dialect: Integer; Value: String): String;
358	>	const
359	>	ValidSQLIdentifierChars = ['A'..'Z','a'..'z','0'..'9','_','$'];
360	>
361	>	{Returns true if the value is a valid SQL Identifier - note lower case accepted}
362	>
363	>	function IsSQLIdentifier(Value: AnsiString): boolean;
364	>	var i: integer;
365	>	begin
366	>	Result := false;
367	>	for i := 1 to Length(Value) do
368	>	if not (Value[i] in ValidSQLIdentifierChars) then Exit;
369	>	Result := true;
370	>	end;
371	>
372	>	{Extracts the Database Connect string from a Create Database Statement}
373	>
374	>	function ExtractConnectString(const CreateSQL: AnsiString;
375	>	var ConnectString: AnsiString): boolean;
376	>	var RegexObj: TRegExpr;
377	>	begin
378	>	RegexObj := TRegExpr.Create;
379	>	try
380	>	{extact database file spec}
381	>	RegexObj.ModifierG := false; {turn off greedy matches}
382	>	RegexObj.ModifierI := true; {case insensitive match}
383	>	RegexObj.Expression := '^ *CREATE +(DATABASE|SCHEMA) +''(.*)''';
384	>	Result := RegexObj.Exec(CreateSQL);
385	>	if Result then
386	>	ConnectString := system.copy(CreateSQL,RegexObj.MatchPos[2],RegexObj.MatchLen[2]);
387	>	finally
388	>	RegexObj.Free;
389	>	end;
390	>	end;
391	>
392	>	{Format an SQL Identifier according to SQL Dialect with encapsulation if necessary}
393	>
394	>	function QuoteIdentifierIfNeeded(Dialect: Integer; Value: AnsiString): AnsiString;
395		begin
396		if (Dialect = 3) and
397	<	((AnsiUpperCase(Value) <> Value) or IsReservedWord(Value)) then
398	<	Result := '"' + Value + '"'
397	>	(IsReservedWord(Value) or not IsSQLIdentifier(Value) or (AnsiUpperCase(Value) <> Value)) then
398	>	Result := '"' + StringReplace (TrimRight(Value), '"', '""', [rfReplaceAll]) + '"'
399		else
400		Result := Value
401		end;
402
403	<	function Space2Underscore(s: string): string;
403	>	{Replaces unknown characters in a string with underscores}
404	>
405	>	function Space2Underscore(s: AnsiString): AnsiString;
406		var
407		k: integer;
408		begin
409		Result := s;
410		for k := 1 to Length(s) do
411	<	if not (Result[k] in ['0'..'9','A'..'Z','_','$'])  then
411	>	if not (Result[k] in ValidSQLIdentifierChars)  then
412		Result[k] := '_';
413		end;
414
415	+	{Reformats an SQL string with single quotes duplicated.}
416	+
417	+	function SQLSafeString(const s: AnsiString): AnsiString;
418	+	begin
419	+	Result := StringReplace(s,'''','''''',[rfReplaceAll]);
420	+	end;
421
422		end.

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