/* 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*)Class_Make_Obj(NOTMATCHER);
return NOTMatcher_init(self, negated_matcher, doc_max);
}
NOTMatcher*
NOTMatcher_init(NOTMatcher *self, Matcher *negated_matcher, int32_t doc_max) {
NOTMatcherIVARS *const ivars = NOTMatcher_IVARS(self);
VArray *children = VA_new(1);
VA_Push(children, INCREF(negated_matcher));
PolyMatcher_init((PolyMatcher*)self, children, NULL);
// Init.
ivars->doc_id = 0;
ivars->next_negation = 0;
// Assign.
ivars->negated_matcher = (Matcher*)INCREF(negated_matcher);
ivars->doc_max = doc_max;
DECREF(children);
return self;
}
void
NOTMatcher_Destroy_IMP(NOTMatcher *self) {
NOTMatcherIVARS *const ivars = NOTMatcher_IVARS(self);
DECREF(ivars->negated_matcher);
SUPER_DESTROY(self, NOTMATCHER);
}
int32_t
NOTMatcher_Next_IMP(NOTMatcher *self) {
NOTMatcherIVARS *const ivars = NOTMatcher_IVARS(self);
while (1) {
ivars->doc_id++;
// Get next negated doc id.
if (ivars->next_negation < ivars->doc_id) {
ivars->next_negation
= Matcher_Advance(ivars->negated_matcher, ivars->doc_id);
if (ivars->next_negation == 0) {
DECREF(ivars->negated_matcher);
ivars->negated_matcher = NULL;
ivars->next_negation = ivars->doc_max + 1;
}
}
if (ivars->doc_id > ivars->doc_max) {
ivars->doc_id = ivars->doc_max; // halt advance
return 0;
}
else if (ivars->doc_id != ivars->next_negation) {
// Success!
return ivars->doc_id;
}
}
}
int32_t
NOTMatcher_Advance_IMP(NOTMatcher *self, int32_t target) {
NOTMatcher_IVARS(self)->doc_id = target - 1;
return NOTMatcher_Next_IMP(self);
}
int32_t
NOTMatcher_Get_Doc_ID_IMP(NOTMatcher *self) {
return NOTMatcher_IVARS(self)->doc_id;
}
float
NOTMatcher_Score_IMP(NOTMatcher *self) {
UNUSED_VAR(self);
return 0.0f;
}