/* 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_RAWLEXICON
#include "Lucy/Util/ToolSet.h"
#include "Lucy/Index/RawLexicon.h"
#include "Lucy/Index/Posting/MatchPosting.h"
#include "Lucy/Index/TermStepper.h"
#include "Lucy/Index/TermInfo.h"
#include "Lucy/Plan/FieldType.h"
#include "Lucy/Plan/Schema.h"
#include "Lucy/Store/InStream.h"
RawLexicon*
RawLex_new(Schema *schema, String *field, InStream *instream,
int64_t start, int64_t end) {
RawLexicon *self = (RawLexicon*)Class_Make_Obj(RAWLEXICON);
return RawLex_init(self, schema, field, instream, start, end);
}
RawLexicon*
RawLex_init(RawLexicon *self, Schema *schema, String *field,
InStream *instream, int64_t start, int64_t end) {
FieldType *type = Schema_Fetch_Type(schema, field);
Lex_init((Lexicon*)self, field);
RawLexiconIVARS *const ivars = RawLex_IVARS(self);
// Assign
ivars->start = start;
ivars->end = end;
ivars->len = end - start;
ivars->instream = (InStream*)INCREF(instream);
// Get ready to begin.
InStream_Seek(ivars->instream, ivars->start);
// Get steppers.
ivars->term_stepper = FType_Make_Term_Stepper(type);
ivars->tinfo_stepper = (TermStepper*)MatchTInfoStepper_new(schema);
return self;
}
void
RawLex_Destroy_IMP(RawLexicon *self) {
RawLexiconIVARS *const ivars = RawLex_IVARS(self);
DECREF(ivars->instream);
DECREF(ivars->term_stepper);
DECREF(ivars->tinfo_stepper);
SUPER_DESTROY(self, RAWLEXICON);
}
bool
RawLex_Next_IMP(RawLexicon *self) {
RawLexiconIVARS *const ivars = RawLex_IVARS(self);
if (InStream_Tell(ivars->instream) >= ivars->len) { return false; }
TermStepper_Read_Delta(ivars->term_stepper, ivars->instream);
TermStepper_Read_Delta(ivars->tinfo_stepper, ivars->instream);
return true;
}
Obj*
RawLex_Get_Term_IMP(RawLexicon *self) {
RawLexiconIVARS *const ivars = RawLex_IVARS(self);
return TermStepper_Get_Value(ivars->term_stepper);
}
int32_t
RawLex_Doc_Freq_IMP(RawLexicon *self) {
RawLexiconIVARS *const ivars = RawLex_IVARS(self);
TermInfo *tinfo = (TermInfo*)TermStepper_Get_Value(ivars->tinfo_stepper);
return tinfo ? TInfo_Get_Doc_Freq(tinfo) : 0;
}