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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "readerbase.h"
#include "attributevector.h"
#include "load_utils.h"
#include <vespa/fastlib/io/bufferedfile.h>
#include <vespa/searchlib/util/filesizecalculator.h>
#include <vespa/vespalib/util/size_literals.h>
#include <cassert>
#include <vespa/log/log.h>
LOG_SETUP(".search.attribute.readerbase");
namespace search {
namespace {
const vespalib::string versionTag = "version";
const vespalib::string docIdLimitTag = "docIdLimit";
const vespalib::string createSerialNumTag = "createSerialNum";
uint64_t
extractCreateSerialNum(const vespalib::GenericHeader &header)
{
return (header.hasTag(createSerialNumTag)) ? header.getTag(createSerialNumTag).asInteger() : 0u;
}
}
ReaderBase::ReaderBase(AttributeVector &attr)
: _datFile(attribute::LoadUtils::openDAT(attr)),
_weightFile(attr.hasWeightedSetType() ?
attribute::LoadUtils::openWeight(attr) : std::unique_ptr<Fast_BufferedFile>()),
_idxFile(attr.hasMultiValue() ?
attribute::LoadUtils::openIDX(attr) : std::unique_ptr<Fast_BufferedFile>()),
_weightReader(_weightFile.valid() ? &_weightFile.file() : nullptr),
_idxReader(_idxFile.valid() ? &_idxFile.file() : nullptr),
_enumReader(&_datFile.file()),
_currIdx(0),
_createSerialNum(0u),
_fixedWidth(attr.getFixedWidth()),
_enumerated(false),
_hasLoadData(false),
_version(0),
_docIdLimit(0)
{
if (!attr.headerTypeOK(_datFile.header())) {
_datFile.close();
}
_createSerialNum = extractCreateSerialNum(_datFile.header());
if (_datFile.header().hasTag(versionTag)) {
_version = _datFile.header().getTag(versionTag).asInteger();
}
_docIdLimit = _datFile.header().getTag(docIdLimitTag).asInteger();
if (hasIdx()) {
if (!attr.headerTypeOK(_idxFile.header())) {
_idxFile.close();
} else {
_currIdx = _idxReader.readHostOrder();
}
}
if (hasWeight()) {
if (!attr.headerTypeOK(_weightFile.header())) {
_weightFile.close();
}
}
if (hasData() && AttributeVector::isEnumerated(_datFile.header())) {
_enumerated = true;
}
_hasLoadData = hasData() &&
(!attr.hasMultiValue() || hasIdx()) &&
(!attr.hasWeightedSetType() || hasWeight());
}
ReaderBase::~ReaderBase() = default;
size_t
ReaderBase::getEnumCount() const {
size_t dataSize = _datFile.data_size();
assert((dataSize % sizeof(uint32_t)) == 0);
return dataSize / sizeof(uint32_t);
}
bool
ReaderBase::hasWeight() const {
return _weightFile.valid();
}
bool
ReaderBase::hasIdx() const {
return _idxFile.valid();
}
bool
ReaderBase::hasData() const {
return _datFile.valid();
}
void
ReaderBase::rewind()
{
_datFile.rewind();
_currIdx = 0;
if (hasIdx()) {
_idxFile.rewind();
_currIdx = _idxReader.readHostOrder();
}
if (hasWeight()) {
_weightFile.rewind();
}
}
size_t
ReaderBase::getNumValues()
{
if (getEnumerated()) {
return getEnumCount();
} else {
if (_fixedWidth > 0) {
size_t dataSize = _datFile.data_size();
assert((dataSize % _fixedWidth) == 0);
return dataSize / _fixedWidth;
} else {
// TODO. This limits the number of multivalues to 2^32-1
// This is assert during write, so this should never be a problem here.
_idxFile.file().SetPosition(_idxFile.file_size() - 4);
size_t numValues = _idxReader.readHostOrder();
rewind();
return numValues;
}
}
}
uint32_t
ReaderBase::getNextValueCount()
{
uint32_t nextIdx = _idxReader.readHostOrder();
uint32_t numValues = nextIdx - _currIdx;
_currIdx = nextIdx;
return numValues;
}
}
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