| /* 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_NOTMATCHER |
| #include "Lucy/Util/ToolSet.h" |
| |
| #include "Lucy/Search/NOTMatcher.h" |
| #include "Lucy/Index/Similarity.h" |
| #include "Lucy/Plan/Schema.h" |
| |
| NOTMatcher* |
| NOTMatcher_new(Matcher *negated_matcher, int32_t doc_max) { |
| NOTMatcher *self = (NOTMatcher*)VTable_Make_Obj(NOTMATCHER); |
| return NOTMatcher_init(self, negated_matcher, doc_max); |
| } |
| |
| NOTMatcher* |
| NOTMatcher_init(NOTMatcher *self, Matcher *negated_matcher, int32_t doc_max) { |
| VArray *children = VA_new(1); |
| VA_Push(children, INCREF(negated_matcher)); |
| PolyMatcher_init((PolyMatcher*)self, children, NULL); |
| |
| // Init. |
| self->doc_id = 0; |
| self->next_negation = 0; |
| |
| // Assign. |
| self->negated_matcher = (Matcher*)INCREF(negated_matcher); |
| self->doc_max = doc_max; |
| |
| DECREF(children); |
| |
| return self; |
| } |
| |
| void |
| NOTMatcher_destroy(NOTMatcher *self) { |
| DECREF(self->negated_matcher); |
| SUPER_DESTROY(self, NOTMATCHER); |
| } |
| |
| int32_t |
| NOTMatcher_next(NOTMatcher *self) { |
| while (1) { |
| self->doc_id++; |
| |
| // Get next negated doc id. |
| if (self->next_negation < self->doc_id) { |
| self->next_negation |
| = Matcher_Advance(self->negated_matcher, self->doc_id); |
| if (self->next_negation == 0) { |
| DECREF(self->negated_matcher); |
| self->negated_matcher = NULL; |
| self->next_negation = self->doc_max + 1; |
| } |
| } |
| |
| if (self->doc_id > self->doc_max) { |
| self->doc_id = self->doc_max; // halt advance |
| return 0; |
| } |
| else if (self->doc_id != self->next_negation) { |
| // Success! |
| return self->doc_id; |
| } |
| } |
| } |
| |
| int32_t |
| NOTMatcher_advance(NOTMatcher *self, int32_t target) { |
| self->doc_id = target - 1; |
| return NOTMatcher_next(self); |
| } |
| |
| int32_t |
| NOTMatcher_get_doc_id(NOTMatcher *self) { |
| return self->doc_id; |
| } |
| |
| float |
| NOTMatcher_score(NOTMatcher *self) { |
| UNUSED_VAR(self); |
| return 0.0f; |
| } |
| |
| |