diff options
Diffstat (limited to 'src/core/xbtblmgr.cpp')
| -rwxr-xr-x | src/core/xbtblmgr.cpp | 257 |
1 files changed, 257 insertions, 0 deletions
diff --git a/src/core/xbtblmgr.cpp b/src/core/xbtblmgr.cpp new file mode 100755 index 0000000..e1bf496 --- /dev/null +++ b/src/core/xbtblmgr.cpp @@ -0,0 +1,257 @@ +/* xbtblmgr.cpp + +XBase64 Software Library + +Copyright (c) 1997,2003,2014,2022 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 + +*/ + +#include "xbase.h" + +//#ifdef HAVE_STRING_H +//#include <string.h> +//#endif + +namespace xb{ + +/*************************************************************************/ + +xbTblMgr::xbTblMgr(){ + TblList = NULL; + iOpenTableCount = 0; +} + +/*************************************************************************/ + +xbTblMgr::~xbTblMgr(){ + xbTblList *l; + if( TblList ){ + while( TblList ){ + l = TblList; + TblList = TblList->pNext; + delete l->psTblName; + delete l->psTblAlias; + free( l ); + } + } +} + +/*************************************************************************/ + +xbInt16 xbTblMgr::AddTblToTblList( xbDbf *d, const xbString & sTblName ){ + return AddTblToTblList( d, sTblName, "" ); +} + +/*************************************************************************/ + +xbInt16 xbTblMgr::AddTblToTblList( xbDbf *d, const xbString & sTblName, const xbString & sTblAlias ) { + + xbTblList *i, *s, *t; + xbInt16 iRc = 0; + xbInt16 iErrorStop = 0; + xbString sAlias; + + try{ + + if( sTblName.Len() == 0 ){ + iErrorStop = 10; + iRc = XB_INVALID_TABLE_NAME; + throw iRc; + } + + if( sTblAlias.Len() == 0 ){ + sAlias = sTblName; + sAlias.SwapChars( '\\', '/' ); + xbUInt32 iPos = sAlias.GetLastPos( '/' ); + if( iPos > 0 ) /* get rid of the directory part of the name */ + sAlias.Ltrunc( iPos ); + } else { + sAlias = sTblAlias; + } + + if((i = (xbTblList *) calloc(1, sizeof(xbTblList))) == NULL){ + iErrorStop = 20; + iRc = XB_NO_MEMORY; + throw iRc; + } + i->psTblName = new xbString( sTblName ); + i->psTblAlias = new xbString( sAlias ); + i->pDbf = d; + i->pNext = NULL; + + // insert new table into the list of open tables, sorted by table name + s = NULL; + t = TblList; + + while(t && (strcmp( t->psTblAlias->Str(), sAlias.Str()) < 0 )){ + s = t; + t = t->pNext; + } + + if( t && (strcmp( t->psTblAlias->Str(), sAlias.Str()) == 0 )){ + iErrorStop = 30; + delete i->psTblName; + delete i->psTblAlias; + free( i ); + iRc = XB_DUP_TABLE_OR_ALIAS; + throw iRc; + } + i->pNext = t; + if (s == NULL) + TblList = i; + else + s->pNext = i; + } + catch (xbInt16 iRc ){ + if( iErrorStop != 30 ){ + xbString sMsg; + sMsg.Sprintf( "xbTblMgr::AddTblToTblList() Exception Caught. Error Stop = [%d] iRc = [%d] Tbl Name = [%s] Alias = [%s]", iErrorStop, iRc, sTblName.Str(), sTblAlias.Str() ); + std::cout << sMsg << std::endl; + } + } + if( iRc == XB_NO_ERROR ) + iOpenTableCount++; + return iRc; +} + +/*************************************************************************/ +xbInt16 xbTblMgr::DisplayTableList() const { + xbInt16 iTblCnt = 0; + xbTblList * l = TblList; + std::cout << "-- Open Table List --" << std::endl; + if( l == NULL ) + std::cout << "Table list is empty" << std::endl; + else{ + while( l ){ + iTblCnt++; + std::cout << iTblCnt << " Table=[" << l->psTblName->Str() << "] Alias=[" << l->psTblAlias->Str() << "]" << std::endl; + l = l->pNext; + } + } + return iTblCnt; +} + +/*************************************************************************/ +/* Get pointer to named dbf. + Looks up an open DBF file by Name. + + returns A pointer to the xbDbf class instance if found or NULL if not found. + + // looks for a match as an alias first, if not found as an alias, looks at the name + +*/ + +xbDbf *xbTblMgr::GetDbfPtr(const xbString& sTblAlias) const { + + xbTblList *t; + t = TblList; + while( t ){ + if( sTblAlias == t->psTblAlias->Str()) + return t->pDbf; + t = t->pNext; + } + + t = TblList; + while( t ){ + if( sTblAlias == t->psTblName->Str()) + return t->pDbf; + t = t->pNext; + } + return NULL; +} + +/*************************************************************************/ +/* Get pointer to named dbf. + Looks up an open DBF file by Name. + + returns pointer to the xbDbf class instance if found or NULL if not found. +*/ + +xbDbf *xbTblMgr::GetDbfPtr(xbInt16 iItemNo ) const { + + xbTblList *t; + t = TblList; + xbInt16 iCnt = 1; + + if( iItemNo < 1 || iItemNo > iOpenTableCount ) + return NULL; + + while( t && iCnt < iItemNo ){ + t = t->pNext; + iCnt++; + } + if( t ) + return t->pDbf; + else + return NULL; +} + +/*************************************************************************/ +xbInt16 xbTblMgr::GetOpenTableCount() const { + return iOpenTableCount; +} + +/*************************************************************************/ +xbInt16 xbTblMgr::RemoveTblFromTblList( const xbString & sTblAlias ) { + xbTblList *i, *s; + + i = TblList; + s = NULL; + + while( i ){ + + if( strcmp( i->psTblAlias->Str(), sTblAlias.Str()) == 0 ) { + if(s) + s->pNext = i->pNext; + else + TblList = i->pNext; + + delete i->psTblName; + delete i->psTblAlias; + free( i ); + iOpenTableCount--; + return XB_NO_ERROR; + } else { + s = i; + i = i->pNext; + } + } + return XB_NOT_FOUND; +} +/*************************************************************************/ +xbInt16 xbTblMgr::RemoveTblFromTblList( xbDbf *pTbl ) { + xbTblList *i, *s; + + i = TblList; + s = NULL; + + while( i ){ + + if( i->pDbf == pTbl ) { + if(s) + s->pNext = i->pNext; + else + TblList = i->pNext; + + delete i->psTblName; + delete i->psTblAlias; + free( i ); + iOpenTableCount--; + return XB_NO_ERROR; + } else { + s = i; + i = i->pNext; + } + } + return XB_NOT_FOUND; +} + +/*************************************************************************/ +} /* namespace */ |