/* OpenIndexRead
* VOpenIndexRead
* open an index for read
*
* "idx" [ OUT ] - return parameter for newly opened index
*
* "name" [ IN ] - NUL terminated string in UTF-8 giving simple name of idx
*/
LIB_EXPORT rc_t CC VTableVOpenIndexRead ( const VTable *self,
struct KIndex const **idx, const char *name, va_list args )
{
rc_t rc;
KIdxType type;
uint32_t version;
const KMDataNode *node;
if ( self == NULL )
{
if ( idx == NULL )
return RC ( rcVDB, rcTable, rcOpening, rcParam, rcNull );
* idx = NULL;
return RC ( rcVDB, rcTable, rcOpening, rcSelf, rcNull );
}
/* open the requested index */
rc = KTableVOpenIndexRead ( self -> ktbl, idx, name, args );
if ( rc != 0 )
return rc;
/* get version and type */
rc = KIndexVersion ( * idx, & version );
if ( rc == 0 )
rc = KIndexType ( * idx, & type );
if ( rc != 0 )
return 0;
/* look for versions 2 or 3, type kitText or kitText with projection */
switch ( version )
{
case 2:
case 3:
switch ( type )
{
case kitText:
case kitText | kitProj:
break;
default:
return 0;
}
break;
default:
return 0;
}
/* look for a node in metadata for repairing maximum id */
rc = KMetadataOpenNodeRead ( self -> meta, & node, "/.seq/spot" );
if ( rc == 0 )
{
int64_t maxid;
rc = KMDataNodeReadAsI64 ( node, & maxid );
if ( rc == 0 )
KIndexSetMaxRowId ( * idx, maxid );
KMDataNodeRelease ( node );
}
return 0;
}
static
bool KMetadataNumEqual ( const KMetadata *meta, const char *path, int64_t num )
{
const KMDataNode *node;
rc_t rc = KMetadataOpenNodeRead ( meta, & node, "%s", path );
if ( rc == 0 )
{
int64_t i;
rc = KMDataNodeReadAsI64 ( node, & i );
KMDataNodeRelease ( node );
if ( rc == 0 )
{
if ( i == num )
return true;
}
}
return false;
}
inline rc_t Read ( int64_t *value ) const throw()
{ return KMDataNodeReadAsI64 ( this, value ); }
