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authorJörg Frings-Fürst <debian@jff-webhosting.net>2023-08-14 19:45:36 +0200
committerJörg Frings-Fürst <debian@jff-webhosting.net>2023-08-14 19:45:36 +0200
commitbfa452a375ea0a0a3f95304a69186936567e5263 (patch)
treeaade062a143c1afcc4ea06ee27905ffc34a9217b /docs/html/xbc18.html
parentdd70ff8bf32c2d7ed365004b1770058265db1978 (diff)
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-<!DOCTYPE HTML PUBLIC>
-<HTML>
-<TITLE>Xbase DBMS Chapter 18</TITLE>
-<BODY BGCOLOR=#FFFFFF>
-<H2><p align="center">Class xbXBase</p></H2>
-<p align="center">Chapter Updated 2/7/23</p><hr>
-
-<h3>Class xbXBase - Core Level Class</h3>
-
-
-The xbXBase class is the core class that needs to be in every application program.
-Established an instance of class xbXBase before any other Xbase calls are made.
-
-<i>xbXBase x</i>
-
-<br><br>
-xbXBase is derived from base classes xbTblMgr and xbSsv.
-<br><br><br><br>
-
-
-
-
-
-<center>
-<table border=1>
-<tr><th width=40%>Method</th><th>Description</th><th>Category</th></tr>
-
-<tr><td>xbInt16 CloseAllTables()</td><td>Close all open tables.</td><td>Table</tr>
-
-<tr><td>xbInt16 OpenHighestVersion( const xbString &sTableName, const xbString &sAlias, xbDbf &dbf, int dummy )</td><td>Open highest version available for sTableName.</td><td>Table</tr>
-<tr><td>xbInt16 OpenHighestVersion( const xbString &sTableName, const xbString &sAlias, xbDbf **dbf )</td><td>Open highest version available for sTableName.</td><td>Table</tr>
-<tr><td>xbDbf * Open( const xbString &sTableName, xbInt16 &iRc )</td><td>Open the highest available version of the dbf file. Defaults to XB_READ_WRITE and XB_MULTI_USER mode.</td><td>Table</tr>
-<tr><td>xbDbf * Open( const xbString &sTableName, const xbString &sAlias, xbInt16 iOpenMode, xbInt16 iShareMode, xbInt16 iVersion, xbInt16 &iRc )</td><td>Open table.</td><td>Table</tr>
-
-<tr><td colspan=3><hr></td></tr>
-<tr><td>void DisableMsgLogging()</td><td>Disable logging routines.</td><td>Logging</td></tr>
-<tr><td>void EnableMsgLogging ()</td><td>Enable logging routines.</td><td>Logging</td></tr>
-<tr><td>xbInt16 FlushLog()</td><td>Flush any queued logfile updates to disk.</td><td>Logging</td></tr>
-<tr><td>const xbString &GetLogDirectory () const</td><td>Get the current logfile directory.</td><td>Logging</td></tr>
-<tr><td>const xbString &GetLogFileName () const</td><td>Get the current logfile name.</td><td>Logging</td></tr>
-<tr><td>const xbString &GetLogFqFileName() const</td><td>Get fully qualified logfile name.</td><td>Logging</td></tr>
-<tr><td>xbBool GetLogStatus () const</td><td>Get the logging status.</td><td>Logging</td></tr>
-<tr><td>void SetLogDirectory( const xbString &sLogFileDirectory )</td><td>Set the log directory. Must be done while logging is off.</td><td>Logging</td></tr>
-<tr><td>void SetLogFileName( const xbString &sLogFileName )</td><td>Set the log file name. Must be done while logging is off.</td><td>Logging</td></tr>
-<tr><td>void SetLogSize( size_t lSize )</td><td>Set the logfile size. After the size is reached, the log file roll.</td><td>Logging</td></tr>
-<tr><td>xbInt16 WriteLogBytes ( xbUInt32 lCnt, const char *p )</td><td>Write lCnt bytes pointed to by pointer p to the logfile.</td><td>Logging</td></tr>
-<tr><td>xbInt16 WriteLogMessage( const xbString &sLogMessage, xbInt16 iOutputOpt = 0 )</td><td>Write a string to the logfile.</td><td>Logging</td></tr>
-
-<tr><td colspan=3><hr></td></tr>
-<tr><td>xbInt16 xbXBase::GetCmdLineOpt( xbInt32 lArgc, char **sArgv, xbString &sOptRqst, xbString &sParmOut )<br>
-xbXBase::GetCmdLineOpt( xbInt32 lArgc, char **sArgv, const char *sOptRqst, xbString &sParmOut )</td><td>Parse command line values seeking given parameter info.</td><td>Misc</td></tr>
-
-<tr><td>void xbSleep( xbInt32 lMillisecs )</td><td>Sleep command, used mainly in lock commands for waiting between retries.</td><td>Misc</td></td></tr>
-
-<tr><td colspan=3><hr></td></tr>
-<tr><td>xbInt16 ABS( xbDouble dIn, xbDouble &dOut )</td><td>Dbase ABS function.</td><td>Expression</td></tr>
-<tr><td>xbInt16 ALLTRIM( const xbString &sIn, xbString &sOut )</td><td>Dbase ALLTRIM function.</td><td>Expression</td></tr>
-<tr><td>xbInt16 ASC( const xbString &s, xbDouble &dAscOut )</td><td>Dbase ASC function.</td><td>Expression</td></tr>
-<tr><td>xbInt16 AT( const xbString &sSrchFor, const xbString &sBase, xbDouble &dPos )</td><td>Dbase AT function.</td><td>Expression</td></tr>
-<tr><td>xbInt16 CDOW( xbDate &dInDate, xbString &sOutDow )</td><td>Dbase CDOW function.</td><td>Expression</td></tr>
-<tr><td>xbInt16 CHR( xbDouble dAsciCd, xbString &sOut )</td><td>Dbase CHR function.</td><td>Expression</td></tr>
-<tr><td>xbInt16 CMONTH( xbDate &dInDate, xbString &sOutMonth )</td><td>Dbase CMONTH function.</td><td>Expression</td></tr>
-<tr><td>xbInt16 CTOD( const xbString &sInDate, xbDate &dOutDate )</td><td>Dbase CTOD function.</td><td>Expression</td></tr>
-<tr><td>xbInt16 DATE( xbDate &dOutDate )</td><td>Dbase DATE function.</td><td>Expression</td></tr>
-<tr><td>xbInt16 DAY( const xbDate &dInDate, xbDouble &dOutDay )</td><td>Dbase DAY function.</td><td>Expression</td></tr>
-<tr><td>xbInt16 DEL( xbDbf * d, xbString &sOut, xbInt16 iRecBufSw = 0 )</td><td>Dbase DEL function.</td><td>Expression</td></tr>
-<tr><td>xbInt16 DELETED( xbDbf * d, xbBool &bOut, xbInt16 iRecBufSw = 0 )</td><td>Dbase DELETED function.</td><td>Expression</td></tr>
-<tr><td>xbInt16 DESCEND( const xbString &sIn,xbString &sOut )<br>xbInt16 DESCEND( const xbDate &dInDate, xbDate &dOutDate )<br>xbInt16 DESCEND( const xbDouble dIn, xbDouble &dsOut )</td><td>Dbase DESCEND function.</td><td>Expression</td></tr>
-<tr><td>xbInt16 DOW( const xbDate &sInDate, xbDouble &dDowOut )</td><td>Dbase DOW function.</td><td>Expression</td></tr>
-<tr><td>xbInt16 DTOC( xbDate &dInDate, xbString &sOutFmtDate )</td><td>Dbase DTOC function.</td><td>Expression</td></tr>
-<tr><td>xbInt16 DTOS( xbDate &dInDate, xbString &sOutFmtDate )</td><td>Dbase DTOS function.</td><td>Expression</td></tr>
-<tr><td>xbInt16 EXP( xbDouble dIn, xbDouble &dOut )</td><td>Dbase EXP function.</td><td>Expression</td></tr>
-<tr><td>xbInt16 IIF( xbBool bResult, const xbString &sTrueResult, const xbString &sFalseResult, xbString &sResult )</td><td>Dbase IIF function.</td><td>Expression</td></tr>
-<tr><td>xbInt16 INT( xbDouble dIn, xbDouble &dOut )</td><td>Dbase INT function.</td><td>Expression</td></tr>
-<tr><td>xbInt16 ISALPHA( const xbString &s, xbBool &bResult )</td><td>Dbase ISALPHA function.</td><td>Expression</td></tr>
-<tr><td>xbInt16 ISLOWER( const xbString &s, xbBool &bResult )</td><td>Dbase ISLOWER function.</td><td>Expression</td></tr>
-<tr><td>xbInt16 ISUPPER( const xbString &s, xbBool &bResult )</td><td>Dbase ISUPPER function.</td><td>Expression</td></tr>
-<tr><td>xbInt16 LEFT( const xbString &sIn, xbUInt32 lCharCnt, xbString &sOut )</td><td>Dbase LEF function.</td><td>Expression</td></tr>
-<tr><td>xbInt16 LEN( const xbString &sIn, xbDouble &dLen )</td><td>Dbase LEN function.</td><td>Expression</td></tr>
-<tr><td>xbInt16 LOG( xbDouble dIn, xbDouble &dOut )</td><td>Dbase LOG function.</td><td>Expression</td></tr>
-<tr><td>xbInt16 LOWER( const xbString &sIn, xbString &sOut )</td><td>Dbase LOWER function.</td><td>Expression</td></tr>
-<tr><td>xbInt16 LTRIM( const xbString &sIn, xbString & sOut )</td><td>Dbase LTRIM function.</td><td>Expression</td></tr>
-<tr><td>xbInt16 MAX( xbDouble dIn1, xbDouble dIn2, xbDouble &dOut )</td><td>Dbase MAX function.</td><td>Expression</td></tr>
-<tr><td>xbInt16 MIN( xbDouble dIn1, xbDouble dIn2, xbDouble &dOut )</td><td>Dbase MIN function.</td><td>Expression</td></tr>
-<tr><td>xbInt16 MONTH( xbDate &dInDate, xbDouble &dMonthOut )</td><td>Dbase MONTH function.</td><td>Expression</td></tr>
-<tr><td>xbInt16 RECCOUNT( xbDbf * d, xbDouble &dRecOut )</td><td>Dbase RECCOUNT function.</td><td>Expression</td></tr>
-<tr><td>xbInt16 RECNO( xbDbf * d, xbDouble &dRecOut )</td><td>Dbase RECNO function.</td><td>Expression</td></tr>
-<tr><td>xbInt16 REPLICATE( const xbString &sIn, xbUInt32 ulRepCnt, xbString &sOut )</td><td>Dbase REPLICATE function.</td><td>Expression</td></tr>
-<tr><td>xbInt16 RIGHT( const xbString &sIn, xbUInt32 iCharCnt, xbString &sOut )</td><td>Dbase RIGHT function.</td><td>Expression</td></tr>
-<tr><td>xbInt16 RTRIM( const xbString &sIn, xbString &sOut )</td><td>Dbase RTRIM function.</td><td>Expression</td></tr>
-<tr><td>xbInt16 SPACE( xbInt32 lCnt, xbString &sOut )</td><td>Dbase SPACE function.</td><td>Expression</td></tr>
-<tr><td>xbInt16 SQRT( xbDouble dBase, xbDouble &dSqrRt )</td><td>Dbase SQRT function.</td><td>Expression</td></tr>
-<tr><td>xbInt16 STOD( const xbString &sIn, xbDate &sDateOut )</td><td>Dbase STOD function.</td><td>Expression</td></tr>
-<tr><td>xbInt16 STR( xbDouble dIn, xbString &sOut )</td><td>Dbase function.</td><td>Expression</td></tr>
-<tr><td>xbInt16 STR( xbDouble dIn, xbUInt32 ulLen, xbString &sOut )<br>
- xbInt16 STR( xbDouble dIn, xbUInt32 ulLen, xbUInt32 ulDec, xbString &sOut )<br>
- xbInt16 STR( xbDouble dIn, xbUInt32 ulLen, xbUInt32 ulDec, xbString &sPadChar, xbString &sOut )</td><td>Dbase STR function.</td><td>Expression</td></tr>
-<tr><td>xbInt16 STRZERO( xbDouble dIn, xbUInt32 ulLen, xbUInt32 ulDec, xbString &sOut )</td><td>Dbase STRZERO function.</td><td>Expression</td></tr>
-<tr><td>xbInt16 SUBSTR( const xbString &sIn, xbUInt32 ulStartPos, xbUInt32 ulLen, xbString &sOut )</td><td>Dbase SUBSTR function.</td><td>Expression</td></tr>
-<tr><td>xbInt16 TRIM( const xbString &sIn, xbString &sOut )</td><td>Dbase TRIM function.</td><td>Expression</td></tr>
-<tr><td>xbInt16 UPPER( const xbString &sIn, xbString &sOut )</td><td>Dbase UPPER function.</td><td>Expression</td></tr>
-<tr><td>xbInt16 VAL( const xbString &sIn, xbDouble &dOut )</td><td>Dbase VAL function.</td><td>Expression</td></tr>
-<tr><td>xbInt16 YEAR( xbDate &dInDate, xbDouble &dOutYear )</td><td>Dbase YEAR function.</td><td>Expression</td></tr>
-</table>
-
-<br><br>
-<hr>
-
-<h3>Example program using xbXbase methods</h3>
-</center>
-<xmp>
-/* xb_ex_ssv.cpp
-XBase64 Software Library
-
-Copyright (c) 1997,2003,2014,2021,2022,2023 Gary A Kunkel
-
-The xb64 software library is covered under the terms of the GPL Version 3, 2007 license.
-
-Email Contact:
-
- XDB-devel@lists.sourceforge.net
- XDB-users@lists.sourceforge.net
-
-This program demonstrates using functionality of the xbSsv class (Shared system values)
-
-*/
-
-#include "xbase.h"
-
-using namespace xb;
-
-int main( int ac, char ** av ){
-
- xbXBase x; // set up xbase for business
- xbString sMsg; // a message string
-
- sMsg.Sprintf( "Program [%s] initializing...", av[0] );
- std::cout << sMsg.Str() << std::endl;
-
- // example code to set up log file usage
- #ifdef XB_LOGGING_SUPPORT
- char cSeperator; // is this a unix (/) or windows (\) file system
- xbString sLog; // general string for log file activities
- sLog = x.GetLogFqFileName().Str(); // get the system default log file name
- std::cout << "System default logfile is [" << sLog.Str() << "]" << std::endl;
-
- cSeperator = sLog.GetPathSeparator(); // get the seperator from
- std::cout << "Path seperator = [" << cSeperator << "]" << std::endl;
-
- sLog.Sprintf( "..%c", cSeperator );
- x.SetLogDirectory( sLog );
- std::cout << "sLog = [" << sLog.Str() << "]\n";
-
- sLog = x.GetLogFqFileName().Str(); // get the system default log file name
- std::cout << "New logfile is [" << sLog.Str() << "]" << std::endl;
-
- // turn on logging after file name set
- x.EnableMsgLogging();
- #endif // XB_LOGGING_SUPPORT
-
- // const char *GetErrorMessage( xbInt16 ErrorCode ) const;
- // void DisplayError( xbInt16 ErrorCode ) const;
- std::cout << "DisplayError( -100 ) - ";
- x.DisplayError( -100 );
- // << "]" << std::endl;
-
-
- // void SetDefaultDateFormat( const xbString &sDefaultDateFormat );
- // xbString& GetDefaultDateFormat() const;
- std::cout << "GetDefaultDateFormat() - " << x.GetDefaultDateFormat() << std::endl;
-
- // void SetDataDirectory ( const xbString &sDataDirectory );
- // xbString& GetDataDirectory() const;
- std::cout << "GetDataDirectory() - " << x.GetDataDirectory() << std::endl;
-
- // xbInt16 GetEndianType() const;
- if( x.GetEndianType() == 'L' )
- std::cout << "Little Endian Architecture." << std::endl;
- else
- std::cout << "Bid Endian Architecture." << std::endl;
-
- //xbBool GetDefaultAutoCommit() const;
- //void SetDefaultAutoCommit( xbBool bDefaultAutoCommit );
- if( x.GetDefaultAutoCommit())
- std::cout << "AutoCommit is on." << std::endl;
- else
- std::cout << "AutoCommit is off." << std::endl;
-
- //xbBool GetMultiUser () const;
- //void SetMultiUser ( xbBool bMultiUser );
- if( x.GetMultiUser())
- std::cout << "Multi user (locking) is enabled." << std::endl;
- else
- std::cout << "Multi user (locking) not enabled." << std::endl;
-
- #if defined (XB_NDX_SUPPORT) || defined (XB_MDX_SUPPORT)
- // xbInt16 GetUniqueKeyOpt () const;
- // xbInt16 SetUniqueKeyOpt ( xbInt16 iUniqueKeyOpt );
- // XB_HALT_ON_DUPKEY
- // XB_EMULATE_DBASE
- if( x.GetUniqueKeyOpt() == XB_HALT_ON_DUPKEY )
- std::cout << "UniqueKey option - XB_HALT_ON_DUPKEY" << std::endl;
- else if( x.GetUniqueKeyOpt() == XB_EMULATE_DBASE )
- std::cout << "UniqueKey option - XB_EMULATE_DBASE" << std::endl;
- #endif // (XB_NDX_SUPPORT) || defined (XB_MDX_SUPPORT)
-
- #ifdef XB_LOCKING_SUPPORT
- //xbInt16 GetDefaultLockRetries () const;
- //void SetDefaultLockRetries ( xbInt16 iRetryCount );
- //xbInt32 GetDefaultLockWait () const;
- //void SetDefaultLockWait ( xbInt32 lRetryWait );
- //xbInt16 GetDefaultLockFlavor () const;
- //void SetDefaultLockFlavor ( xbInt16 iLockFlavor );
- //xbBool GetDefaultAutoLock () const;
- //void SetDefaultAutoLock ( xbBool bAutoLock );
- //void EnableDefaultAutoLock ();
- //void DisableDefaultAutoLock ();
-
- std::cout << "GetDefaultLockRetries() - " << x.GetDefaultLockRetries() << std::endl;
- std::cout << "GetDefaultLockWait() - " << x.GetDefaultLockWait() << std::endl;
- std::cout << "GetDefaultAutoLock() - " << x.GetDefaultAutoLock() << std::endl;
- #endif // XB_LOCKING_SUPPORT
-
- #ifdef XB_MDX_SUPPORT
- // xbInt16 GetCreateMdxBlockSize() const;
- // xbInt16 SetCreateMdxBlockSize( xbInt16 ulBlockSize );
- std::cout << "GetCreateMdxBlockSize() - " << x.GetCreateMdxBlockSize() << std::endl;
- #endif // XB_MDX_SUPPORT
-
- #ifdef XB_BLOCKREAD_SUPPORT
- // xbUInt32 GetDefaultBlockReadSize() const;
- // void SetDefaultBlockReadSize( xbUInt32 ulDfltBlockReadSize );
- std::cout << "GetDefaultBlockReadSize() - " << x.GetDefaultBlockReadSize() << std::endl;
- #endif // XB_BLOCKREAD_SUPPORT
-
- //xbBool BitSet ( unsigned char c, xbInt16 iBitNo ) const;
- //void BitDump ( unsigned char c ) const;
- //void BitDump ( char c ) const;
- std::cout << "BitDump( 'A' ) - ";
- x.BitDump( 'A' );
-
- return 0;
-}
-
-
-</xmp>
-
-<br><br>
-<hr>
-<p><img src="xbase.jpg"><br><hr>
-</BODY>
-</HTML>
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