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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 } |
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{ 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} |
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{$Mode Delphi} |
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{$codepage UTF8} |
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{$ENDIF} |
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|
| 44 |
interface |
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|
| 46 |
uses Classes, SysUtils; |
| 47 |
|
| 48 |
const |
| 49 |
CRLF = #13 + #10; |
| 50 |
CR = #13; |
| 51 |
LF = #10; |
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TAB = #9; |
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NULL_TERMINATOR = #0; |
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|
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sqlReservedWords: array [0..197] of string = ( |
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'ADD', |
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'ADMIN', |
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'ALL', |
| 59 |
'ALTER', |
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'AND', |
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'ANY', |
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'AS', |
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'AT', |
| 64 |
'AVG', |
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'BEGIN', |
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'BETWEEN', |
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'BIGINT', |
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'BIT_LENGTH', |
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'BLOB', |
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'BOOLEAN', |
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'BOTH', |
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'BY', |
| 73 |
'CASE', |
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'CAST', |
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'CHAR', |
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'CHAR_LENGTH', |
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'CHARACTER', |
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'CHARACTER_LENGTH', |
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'CHECK', |
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'CLOSE', |
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'COLLATE', |
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'COLUMN', |
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'COMMIT', |
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'CONNECT', |
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'CONSTRAINT', |
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'CORR', |
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'COUNT', |
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'COVAR_POP', |
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'COVAR_SAMP', |
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'CREATE', |
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'CROSS', |
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'CURRENT', |
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'CURRENT_CONNECTION', |
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'CURRENT_DATE', |
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'CURRENT_ROLE', |
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'CURRENT_TIME', |
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'CURRENT_TIMESTAMP', |
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'CURRENT_TRANSACTION', |
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'CURRENT_USER', |
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'CURSOR', |
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'DATE', |
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'DAY', |
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'DEC', |
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'DECIMAL', |
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'DECLARE', |
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'DEFAULT', |
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'DELETE', |
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'DELETING', |
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'DETERMINISTIC', |
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'DISCONNECT', |
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'DISTINCT', |
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'DOUBLE', |
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'DROP', |
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'ELSE', |
| 115 |
'END', |
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'ESCAPE', |
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'EXECUTE', |
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'EXISTS', |
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'EXTERNAL', |
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'EXTRACT', |
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'FALSE', |
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'FETCH', |
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'FILTER', |
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'FLOAT', |
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'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; |
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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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uses RegExpr; |
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|
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function Max(n1, n2: Integer): Integer; |
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begin |
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if (n1 > n2) then |
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result := n1 |
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else |
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result := n2; |
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end; |
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|
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function Min(n1, n2: Integer): Integer; |
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begin |
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if (n1 < n2) then |
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result := n1 |
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else |
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result := n2; |
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end; |
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|
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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))); |
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if Length(result) > iLength then |
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result := Copy(result, 1, iLength); |
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end; |
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|
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function RandomInteger(iLow, iHigh: Integer): Integer; |
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begin |
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result := Trunc(Random(iHigh - iLow)) + iLow; |
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end; |
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|
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function StripString(st: AnsiString; CharsToStrip: AnsiString): AnsiString; |
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var |
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i: Integer; |
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begin |
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result := ''; |
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for i := 1 to Length(st) do begin |
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if AnsiPos(st[i], CharsToStrip) = 0 then |
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result := result + st[i]; |
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end; |
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end; |
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|
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{Extracts SQL Identifier typically from a Dialect 3 encoding} |
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|
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function ExtractIdentifier(Dialect: Integer; Value: AnsiString): AnsiString; |
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begin |
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Value := Trim(Value); |
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if Dialect = 1 then |
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Value := AnsiUpperCase(Value) |
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else |
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begin |
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if (Value <> '') and (Value[1] = '"') then |
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begin |
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Delete(Value, 1, 1); |
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Delete(Value, Length(Value), 1); |
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Value := StringReplace (Value, '""', '"', [rfReplaceAll]); |
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end |
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else |
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Value := AnsiUpperCase(Value); |
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end; |
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Result := Value; |
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end; |
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|
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{Returns true if "w" is a Firebird SQL reserved word} |
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|
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function IsReservedWord(w: AnsiString): boolean; |
| 338 |
var i: integer; |
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begin |
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Result := true; |
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for i := 0 to Length(sqlReservedWords) - 1 do |
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if w = sqlReservedWords[i] then |
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Exit; |
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Result := false; |
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end; |
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|
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{Format an SQL Identifier according to SQL Dialect} |
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|
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function QuoteIdentifier(Dialect: Integer; Value: AnsiString): AnsiString; |
| 350 |
begin |
| 351 |
if Dialect = 1 then |
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Value := AnsiUpperCase(Trim(Value)) |
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else |
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Value := '"' + StringReplace (Value, '""', '"', [rfReplaceAll]) + '"'; |
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Result := Value; |
| 356 |
end; |
| 357 |
|
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const |
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ValidSQLIdentifierChars = ['A'..'Z','a'..'z','0'..'9','_','$']; |
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|
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{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; |
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|
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{Extracts the Database Connect string from a Create Database Statement} |
| 373 |
|
| 374 |
function ExtractConnectString(const CreateSQL: AnsiString; |
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var ConnectString: AnsiString): boolean; |
| 376 |
var RegexObj: TRegExpr; |
| 377 |
begin |
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RegexObj := TRegExpr.Create; |
| 379 |
try |
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{extact database file spec} |
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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 |
(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 |
{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 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. |
