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{************************************************************************} |
| 2 |
{ } |
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{ Borland Delphi Visual Component Library } |
| 4 |
{ InterBase Express core components } |
| 5 |
{ } |
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{ Copyright (c) 1998-2000 Inprise Corporation } |
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{ } |
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{ InterBase Express is based in part on the product } |
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{ Free IB Components, written by Gregory H. Deatz for } |
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{ Hoagland, Longo, Moran, Dunst & Doukas Company. } |
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{ Free IB Components is used under license. } |
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{ } |
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{ The contents of this file are subject to the InterBase } |
| 14 |
{ Public License Version 1.0 (the "License"); you may not } |
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{ use this file except in compliance with the License. You } |
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{ may obtain a copy of the License at http://www.Inprise.com/IPL.html } |
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{ Software distributed under the License is distributed on } |
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{ an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either } |
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{ express or implied. See the License for the specific language } |
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{ governing rights and limitations under the License. } |
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{ The Original Code was created by InterBase Software Corporation } |
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{ and its successors. } |
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{ Portions created by Inprise Corporation are Copyright (C) Inprise } |
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{ Corporation. All Rights Reserved. } |
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{ Contributor(s): Jeff Overcash } |
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{ } |
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{ IBX For Lazarus (Firebird Express) } |
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{ Contributor: Tony Whyman, MWA Software http://www.mwasoftware.co.uk } |
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{ Portions created by MWA Software are copyright McCallum Whyman } |
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{ Associates Ltd 2011 } |
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{ } |
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{************************************************************************} |
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|
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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', |
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'CURRENT_ROLE', |
| 98 |
'CURRENT_TIME', |
| 99 |
'CURRENT_TIMESTAMP', |
| 100 |
'CURRENT_TRANSACTION', |
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'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', |
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'FALSE', |
| 124 |
'FETCH', |
| 125 |
'FILTER', |
| 126 |
'FLOAT', |
| 127 |
'FOR', |
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'FOREIGN', |
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'FROM', |
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'FULL', |
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'FUNCTION', |
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'GDSCODE', |
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'GLOBAL', |
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'GRANT', |
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'GROUP', |
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'HAVING', |
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'HOUR', |
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'IN', |
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'INDEX', |
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'INNER', |
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'INSENSITIVE', |
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'INSERT', |
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'INSERTING', |
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'INT', |
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'INTEGER', |
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'INTO', |
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'IS', |
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'JOIN', |
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'LEADING', |
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'LEFT', |
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'LIKE', |
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'LONG', |
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'LOWER', |
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'MAX', |
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'MAXIMUM_SEGMENT', |
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'MERGE', |
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'MIN', |
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'MINUTE', |
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'MONTH', |
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'NATIONAL', |
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'NATURAL', |
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'NCHAR', |
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'NO', |
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'NOT', |
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'NULL', |
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'NUMERIC', |
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'OCTET_LENGTH', |
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'OF', |
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'OFFSET', |
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'ON', |
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'ONLY', |
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'OPEN', |
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'OR', |
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'ORDER', |
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'OUTER', |
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'OVER', |
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'PARAMETER', |
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'PLAN', |
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'POSITION', |
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'POST_EVENT', |
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'PRECISION', |
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'PRIMARY', |
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'PROCEDURE', |
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'RDB$DB_KEY', |
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'RDB$RECORD_VERSION', |
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'REAL', |
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'RECORD_VERSION', |
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'RECREATE', |
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'RECURSIVE', |
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'REFERENCES', |
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'REGR_AVGX', |
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'REGR_AVGY', |
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'REGR_COUNT', |
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'REGR_INTERCEPT', |
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'REGR_R2', |
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'REGR_SLOPE', |
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'REGR_SXX', |
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'REGR_SXY', |
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'REGR_SYY', |
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'RELEASE', |
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'RETURN', |
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'RETURNING_VALUES', |
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'RETURNS', |
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'REVOKE', |
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'RIGHT', |
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'ROLLBACK', |
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'ROW', |
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'ROW_COUNT', |
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'ROWS', |
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'SAVEPOINT', |
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'SCROLL', |
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'SECOND', |
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'SELECT', |
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'SENSITIVE', |
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'SET', |
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'SIMILAR', |
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'SMALLINT', |
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'SOME', |
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'SQLCODE', |
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'SQLSTATE', |
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'SQLSTATE', |
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'START', |
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'STDDEV_POP', |
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'STDDEV_SAMP', |
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'SUM', |
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'TABLE', |
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'THEN', |
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'TIME', |
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'TIMESTAMP', |
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'TO', |
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'TRAILING', |
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'TRIGGER', |
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'TRIM', |
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'TRUE', |
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'UNION', |
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'UNIQUE', |
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'UNKNOWN', |
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'UPDATE', |
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'UPDATING', |
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'UPPER', |
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'USER', |
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'USING', |
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'VALUE', |
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'VALUES', |
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'VAR_POP', |
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'VAR_SAMP', |
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'VARCHAR', |
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'VARIABLE', |
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'VARYING', |
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'VIEW', |
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'WHEN', |
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'WHERE', |
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'WHILE', |
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'WITH', |
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'YEAR' |
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); |
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|
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function Max(n1, n2: Integer): Integer; |
| 259 |
function Min(n1, n2: Integer): Integer; |
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function RandomString(iLength: Integer): AnsiString; |
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function RandomInteger(iLow, iHigh: Integer): Integer; |
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function StripString(st: AnsiString; CharsToStrip: AnsiString): AnsiString; |
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function ExtractIdentifier(Dialect: Integer; Value: AnsiString): AnsiString; |
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function QuoteIdentifier(Dialect: Integer; Value: AnsiString): AnsiString; |
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function QuoteIdentifierIfNeeded(Dialect: Integer; Value: AnsiString): AnsiString; |
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function Space2Underscore(s: AnsiString): AnsiString; |
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function SQLSafeString(const s: AnsiString): AnsiString; |
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function IsSQLIdentifier(Value: AnsiString): boolean; |
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function ExtractConnectString(const CreateSQL: AnsiString; var ConnectString: AnsiString): boolean; |
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|
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implementation |
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|
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{$IFDEF HASREQEX} |
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uses RegExpr; |
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{$ENDIF} |
| 276 |
|
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function Max(n1, n2: Integer): Integer; |
| 278 |
begin |
| 279 |
if (n1 > n2) then |
| 280 |
result := n1 |
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else |
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result := n2; |
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end; |
| 284 |
|
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function Min(n1, n2: Integer): Integer; |
| 286 |
begin |
| 287 |
if (n1 < n2) then |
| 288 |
result := n1 |
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else |
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result := n2; |
| 291 |
end; |
| 292 |
|
| 293 |
function RandomString(iLength: Integer): AnsiString; |
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begin |
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result := ''; |
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while Length(result) < iLength do |
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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 |
|
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{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 |
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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 |
{$ELSE} |
| 397 |
{cruder version of above for Delphi. Older versions lack regular expression |
| 398 |
handling.} |
| 399 |
function ExtractConnectString(const CreateSQL: AnsiString; |
| 400 |
var ConnectString: AnsiString): boolean; |
| 401 |
var i: integer; |
| 402 |
begin |
| 403 |
Result := false; |
| 404 |
i := Pos('''',CreateSQL); |
| 405 |
if i > 0 then |
| 406 |
begin |
| 407 |
ConnectString := CreateSQL; |
| 408 |
delete(ConnectString,1,i); |
| 409 |
i := Pos('''',ConnectString); |
| 410 |
if i > 0 then |
| 411 |
begin |
| 412 |
delete(ConnectString,i,Length(ConnectString)-i+1); |
| 413 |
Result := true; |
| 414 |
end; |
| 415 |
end; |
| 416 |
end; |
| 417 |
{$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 |
(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 |
{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 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. |
