GByte *OGRMIAttrIndex::BuildKey( OGRField *psKey )
{
GByte* ret = nullptr;
switch( poFldDefn->GetType() )
{
case OFTInteger:
ret = poINDFile->BuildKey( iIndex, psKey->Integer );
break;
case OFTInteger64:
{
if( !CPL_INT64_FITS_ON_INT32(psKey->Integer64) )
{
CPLError(CE_Warning, CPLE_NotSupported,
"64bit integer value passed to OGRMIAttrIndex::BuildKey()");
}
ret = poINDFile->BuildKey( iIndex, static_cast<int>(psKey->Integer64) );
break;
}
case OFTReal:
ret = poINDFile->BuildKey( iIndex, psKey->Real );
break;
case OFTString:
ret = poINDFile->BuildKey( iIndex, psKey->String );
break;
default:
CPLAssert( false );
break;
}
return ret;
}
GByte *OGRMIAttrIndex::BuildKey( OGRField *psKey )
{
switch( poFldDefn->GetType() )
{
case OFTInteger:
return poINDFile->BuildKey( iIndex, psKey->Integer );
break;
case OFTInteger64:
{
if( !CPL_INT64_FITS_ON_INT32(psKey->Integer64) )
{
CPLError(CE_Warning, CPLE_NotSupported,
"64bit integer value passed to OGRMIAttrIndex::BuildKey()");
}
return poINDFile->BuildKey( iIndex, (int)psKey->Integer64 );
break;
}
case OFTReal:
return poINDFile->BuildKey( iIndex, psKey->Real );
break;
case OFTString:
return poINDFile->BuildKey( iIndex, psKey->String );
break;
default:
CPLAssert( FALSE );
return NULL;
}
}
/**********************************************************************
* SearchIndex()
*
* Search a TAB dataset's .IND file for pszVal in index nIndexNo
**********************************************************************/
static int SearchIndex(const char *pszFname, int nIndexNo, const char *pszVal)
{
TABFile oTABFile;
TABINDFile *poINDFile;
/*---------------------------------------------------------------------
* Try to open source file
*--------------------------------------------------------------------*/
if (oTABFile.Open(pszFname, "rb") != 0)
{
printf("Failed to open %s as a TABFile.\n", pszFname);
return -1;
}
/*---------------------------------------------------------------------
* Fetch IND file handle
*--------------------------------------------------------------------*/
if ((poINDFile = oTABFile.GetINDFileRef()) == NULL)
{
printf("Dataset %s has no .IND file\n", pszFname);
return -1;
}
/*---------------------------------------------------------------------
* Search the index.
* For now we search only 'char' index types!!!
*--------------------------------------------------------------------*/
GByte *pKey;
int nRecordNo;
pKey = poINDFile->BuildKey(nIndexNo, pszVal);
nRecordNo = poINDFile->FindFirst(nIndexNo, pKey);
if (nRecordNo < 1)
{
printf("Value '%s' not found in index #%d\n", pszVal, nIndexNo);
}
else
{
while(nRecordNo > 0)
{
printf("Record %d...\n", nRecordNo);
nRecordNo = poINDFile->FindNext(nIndexNo, pKey);
}
}
/*---------------------------------------------------------------------
* Cleanup and exit.
*--------------------------------------------------------------------*/
oTABFile.Close();
return 0;
}
GByte *OGRMIAttrIndex::BuildKey( OGRField *psKey )
{
switch( poFldDefn->GetType() )
{
case OFTInteger:
return poINDFile->BuildKey( iIndex, psKey->Integer );
break;
case OFTReal:
return poINDFile->BuildKey( iIndex, psKey->Real );
break;
case OFTString:
return poINDFile->BuildKey( iIndex, psKey->String );
break;
default:
CPLAssert( FALSE );
return NULL;
}
}
/**********************************************************************
* CreateIndex()
*
* Create index for specified field in an existing TAB dataset.
**********************************************************************/
static int CreateIndex(const char *pszSrcFname, const char *pszField)
{
IMapInfoFile *poSrcFile = NULL;
int nFeatureId, iField;
TABFeature *poFeature;
TABINDFile *poINDFile;
/*---------------------------------------------------------------------
* Try to open source file
*--------------------------------------------------------------------*/
if ((poSrcFile = IMapInfoFile::SmartOpen(pszSrcFname)) == NULL)
{
printf("Failed to open %s\n", pszSrcFname);
return -1;
}
if (poSrcFile->GetFileClass() != TABFC_TABFile)
{
printf("Indexes cannot be added to this type of TAB datasets\n");
poSrcFile->Close();
delete poSrcFile;
return -1;
}
/*---------------------------------------------------------------------
* Make sure field exists and is not already indexed
*--------------------------------------------------------------------*/
OGRFeatureDefn *poDefn = poSrcFile->GetLayerDefn();
if ( poDefn == NULL ||
(iField = poDefn->GetFieldIndex(pszField)) == -1 ||
poSrcFile->IsFieldIndexed(iField))
{
printf("Cannot create index: field '%s' not found or is already indexed.\n",
pszField);
poSrcFile->Close();
delete poSrcFile;
return -1;
}
/*---------------------------------------------------------------------
* Things seem OK... open IND file for update
* (Note that TABINDFile automagically adjusts file extension)
*--------------------------------------------------------------------*/
poINDFile = new TABINDFile;
if ( poINDFile->Open(pszSrcFname, "r+", TRUE) != 0 &&
poINDFile->Open(pszSrcFname, "w", TRUE) != 0)
{
printf("Unable to create IND file for %s.\n", pszSrcFname);
delete poINDFile;
poSrcFile->Close();
delete poSrcFile;
return -1;
}
int nNewIndexNo = -1;
OGRFieldDefn *poFieldDefn = poDefn->GetFieldDefn(iField);
TABFieldType eFieldType = poSrcFile->GetNativeFieldType(iField);
if (poFieldDefn == NULL ||
(nNewIndexNo = poINDFile->CreateIndex(eFieldType,
poFieldDefn->GetWidth()) ) < 1)
{
// Failed... an error has already been reported.
delete poINDFile;
poSrcFile->Close();
delete poSrcFile;
return -1;
}
printf("Index number %d will be created for field %s...\n\n"
"This program does not update the TAB header file (yet!) so you \n"
"should edit %s and add 'Index %d' at the end of the definition \n"
"of field %s.\n\n",
nNewIndexNo, pszField, pszSrcFname, nNewIndexNo, pszField);
/*---------------------------------------------------------------------
* Add index entries until we reach EOF
*--------------------------------------------------------------------*/
nFeatureId = -1;
while ( (nFeatureId = poSrcFile->GetNextFeatureId(nFeatureId)) != -1 )
{
poFeature = poSrcFile->GetFeatureRef(nFeatureId);
if (poFeature)
{
GByte *pKey = NULL;
switch(eFieldType)
{
case TABFChar:
pKey = poINDFile->BuildKey(nNewIndexNo,
poFeature->GetFieldAsString(iField));
break;
case TABFInteger:
case TABFSmallInt:
pKey = poINDFile->BuildKey(nNewIndexNo,
poFeature->GetFieldAsInteger(iField));
break;
case TABFDecimal:
case TABFFloat:
case TABFLogical:
pKey = poINDFile->BuildKey(nNewIndexNo,
poFeature->GetFieldAsDouble(iField));
break;
default:
case TABFDate:
CPLAssert(FALSE); // Unsupported for now.
}
if (poINDFile->AddEntry(nNewIndexNo, pKey, nFeatureId) != 0)
return -1;
}
else
break; // GetFeatureRef() failed: Abort the loop
}
/*---------------------------------------------------------------------
* Cleanup and exit.
*--------------------------------------------------------------------*/
poINDFile->Close();
delete poINDFile;
poSrcFile->Close();
delete poSrcFile;
MITABFreeCoordSysTable();
return 0;
}