ChertCompact::PostlistCursor Class Reference
Public Member Functions | |
| PostlistCursor (ChertTable *in, Xapian::docid offset_) | |
| ~PostlistCursor () | |
| bool | next () |
| Advance to the next key. | |
Public Attributes | |
| string | key |
| string | tag |
| Xapian::docid | firstdid |
| Xapian::termcount | tf |
| Xapian::termcount | cf |
Private Attributes | |
| Xapian::docid | offset |
Detailed Description
Definition at line 83 of file chert_compact.cc.
Constructor & Destructor Documentation
| ChertCompact::PostlistCursor::PostlistCursor | ( | ChertTable * | in, | |
| Xapian::docid | offset_ | |||
| ) | [inline] |
| ChertCompact::PostlistCursor::~PostlistCursor | ( | ) | [inline] |
Member Function Documentation
| bool ChertCompact::PostlistCursor::next | ( | ) | [inline] |
Advance to the next key.
If cursor is unpositioned, the result is simply false.
If cursor is positioned, and points to the very last item in the Btree the cursor is made unpositioned, and the result is false. Otherwise the cursor is moved to the next item in the B-tree, and the result is true.
Effectively, ChertCursor::next() loses the position of BC when it drops off the end of the list of items. If this is awkward, one can always arrange for a key to be present which has a rightmost position in a set of keys,
Reimplemented from ChertCursor.
Definition at line 103 of file chert_compact.cc.
References cf, ChertCursor::current_key, ChertCursor::current_tag, firstdid, ChertCompact::is_doclenchunk_key(), ChertCompact::is_metainfo_key(), ChertCompact::is_user_metadata_key(), ChertCompact::is_valuechunk_key(), ChertCompact::is_valuestats_key(), key, ChertCursor::next(), offset, pack_uint(), pack_uint_preserving_sort(), ChertCursor::read_tag(), tag, tf, unpack_string_preserving_sort(), unpack_uint(), and unpack_uint_preserving_sort().
Referenced by ChertCompact::merge_postlists(), and PostlistCursor().
Member Data Documentation
Definition at line 89 of file chert_compact.cc.
Referenced by ChertCompact::merge_postlists(), and next().
Definition at line 88 of file chert_compact.cc.
Referenced by ChertCompact::merge_postlists(), next(), and ChertCompact::PostlistCursorGt::operator()().
Definition at line 87 of file chert_compact.cc.
Referenced by ChertCompact::merge_postlists(), next(), and ChertCompact::PostlistCursorGt::operator()().
Definition at line 87 of file chert_compact.cc.
Referenced by ChertCompact::merge_postlists(), and next().
Definition at line 89 of file chert_compact.cc.
Referenced by ChertCompact::merge_postlists(), and next().
The documentation for this class was generated from the following file:
- backends/chert/chert_compact.cc