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/* 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 */
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