| /* Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #define C_LUCY_MATCHER |
| #define LUCY_USE_SHORT_NAMES |
| #define CHY_USE_SHORT_NAMES |
| |
| #include "Lucy/Search/Matcher.h" |
| #include "Lucy/Object/Err.h" |
| #include "Lucy/Object/VTable.h" |
| #include "Lucy/Search/Collector.h" |
| |
| Matcher* |
| Matcher_init(Matcher *self) { |
| ABSTRACT_CLASS_CHECK(self, MATCHER); |
| return self; |
| } |
| |
| int32_t |
| Matcher_advance(Matcher *self, int32_t target) { |
| while (1) { |
| int32_t doc_id = Matcher_Next(self); |
| if (doc_id == 0 || doc_id >= target) { |
| return doc_id; |
| } |
| } |
| } |
| |
| void |
| Matcher_collect(Matcher *self, Collector *collector, Matcher *deletions) { |
| int32_t doc_id = 0; |
| int32_t next_deletion = deletions ? 0 : I32_MAX; |
| |
| Coll_Set_Matcher(collector, self); |
| |
| // Execute scoring loop. |
| while (1) { |
| if (doc_id > next_deletion) { |
| next_deletion = Matcher_Advance(deletions, doc_id); |
| if (next_deletion == 0) { next_deletion = I32_MAX; } |
| continue; |
| } |
| else if (doc_id == next_deletion) { |
| // Skip past deletions. |
| while (doc_id == next_deletion) { |
| // Artifically advance matcher. |
| while (doc_id == next_deletion) { |
| doc_id++; |
| next_deletion = Matcher_Advance(deletions, doc_id); |
| if (next_deletion == 0) { next_deletion = I32_MAX; } |
| } |
| // Verify that the artificial advance actually worked. |
| doc_id = Matcher_Advance(self, doc_id); |
| if (doc_id > next_deletion) { |
| next_deletion = Matcher_Advance(deletions, doc_id); |
| } |
| } |
| } |
| else { |
| doc_id = Matcher_Advance(self, doc_id + 1); |
| if (doc_id >= next_deletion) { |
| next_deletion = Matcher_Advance(deletions, doc_id); |
| if (doc_id == next_deletion) { continue; } |
| } |
| } |
| |
| if (doc_id) { |
| Coll_Collect(collector, doc_id); |
| } |
| else { |
| break; |
| } |
| } |
| |
| Coll_Set_Matcher(collector, NULL); |
| } |
| |
| |