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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "attrvector.h"
#include "attrvector.hpp"
#include "iattributesavetarget.h"
#include "load_utils.h"
#include <vespa/vespalib/data/databuffer.h>
#include <vespa/log/log.h>
LOG_SETUP(".searchlib.attribute.attr_vector");
namespace search {
StringDirectAttribute::
StringDirectAttribute(const vespalib::string & baseFileName, const Config & c)
: search::StringAttribute(baseFileName, c),
_buffer(),
_offsets(),
_idx()
{
}
StringDirectAttribute::~StringDirectAttribute() = default;
AttributeVector::SearchContext::UP
StringDirectAttribute::getSearch(QueryTermSimpleUP, const attribute::SearchContextParams &) const {
LOG_ABORT("StringDirectAttribute::getSearch is not implemented and should never be called.");
}
bool StringDirectAttribute::findEnum(const char * key, EnumHandle & e) const
{
if (_offsets.size() < 1) {
e = 0;
return false;
}
int delta;
const int eMax = getEnumMax();
for (delta = 1; delta <= eMax; delta <<= 1) { }
delta >>= 1;
int pos = delta - 1;
int cmpres(0);
while (delta != 0) {
delta >>= 1;
if (pos >= eMax) {
pos -= delta;
} else {
const char *name = &_buffer[_offsets[pos]];
cmpres = strcmp(key, name);
if (cmpres == 0) {
e = pos;
return true;
}
pos += (cmpres < 0) ? -delta : +delta;
}
}
e = ((cmpres > 0) && (pos < eMax)) ? pos + 1 : pos;
return false;
}
// XXX this is not really correct
std::vector<StringDirectAttribute::EnumHandle>
StringDirectAttribute::findFoldedEnums(const char *key) const
{
std::vector<EnumHandle> result;
EnumHandle handle;
if (findEnum(key, handle)) {
result.push_back(handle);
}
return result;
}
void StringDirectAttribute::onSave(IAttributeSaveTarget & saveTarget)
{
assert(!saveTarget.getEnumerated());
using Buffer = IAttributeSaveTarget::Buffer;
if ( hasEnum() ) {
uint32_t sz(getMaxValueCount());
Buffer dat(saveTarget.datWriter().allocBuf(sz*getNumDocs()*11));
const char * * v = new const char *[sz];
for(size_t i(0), m(getNumDocs()); i < m; i++) {
for(size_t j(0), k(static_cast<const AttributeVector &>(*this).get(i, v, sz)); j < k; j++) {
dat->writeBytes(v[j], strlen(v[j]) + 1);
}
}
delete [] v;
} else if ( ! _buffer.empty() ) {
Buffer dat(saveTarget.datWriter().allocBuf(_buffer.size()));
dat->writeBytes(&_buffer[0], _buffer.size());
saveTarget.datWriter().writeBuf(std::move(dat));
}
if (hasMultiValue()) {
Buffer buf(saveTarget.idxWriter().allocBuf(sizeof(uint32_t) *
_idx.size()));
buf->writeBytes(&_idx[0], sizeof(uint32_t) * _idx.size());
saveTarget.idxWriter().writeBuf(std::move(buf));
}
}
class stringComp {
public:
stringComp(const char * buffer) : _buffer(buffer) { }
bool operator()(uint32_t x, uint32_t y) const { return strcmp(_buffer+x, _buffer+y) < 0; }
private:
const char * _buffer;
};
void addString(const char * v, StringAttribute::OffsetVector & offsets, std::vector<char> & buffer)
{
offsets.push_back(buffer.size());
for(const char *p(v); *p; p++) {
buffer.push_back(*p);
}
buffer.push_back('\0');
}
bool StringDirectAttribute::onLoad(vespalib::Executor *)
{
{
std::vector<char> empty;
std::vector<uint32_t> empty1;
std::vector<uint32_t> empty2;
OffsetVector empty3;
std::swap(empty, _buffer);
std::swap(empty2, _idx);
std::swap(empty3, _offsets);
setNumDocs(0);
setCommittedDocIdLimit(0);
}
auto tmpBuffer = attribute::LoadUtils::loadDAT(*this);
bool rc(tmpBuffer.get());
if (rc) {
if ( ! tmpBuffer->empty()) {
OffsetVector tmpOffsets;
tmpOffsets.reserve(countZero(tmpBuffer->c_str(), tmpBuffer->size()) + 1);
generateOffsets(tmpBuffer->c_str(), tmpBuffer->size(), tmpOffsets);
if ( hasEnum() ) {
std::sort(tmpOffsets.begin(), tmpOffsets.end(), stringComp(tmpBuffer->c_str()));
_offsets.clear();
_buffer.clear();
if (!tmpOffsets.empty()) {
const char * prev(tmpBuffer->c_str() + tmpOffsets[0]);
addString(prev, _offsets, _buffer);
for(OffsetVector::const_iterator it(tmpOffsets.begin()+1), mt(tmpOffsets.end()); it != mt; it++) {
if (strcmp(tmpBuffer->c_str() + *it, prev) != 0) {
prev = tmpBuffer->c_str() + *it;
addString(prev, _offsets, _buffer);
}
}
}
setEnumMax(_offsets.size());
generateOffsets(tmpBuffer->c_str(), tmpBuffer->size(), tmpOffsets);
} else {
_buffer.clear();
_buffer.reserve(tmpBuffer->size());
for (size_t i=0; i < tmpBuffer->size(); i++) {
_buffer.push_back(tmpBuffer->c_str()[i]);
}
std::swap(tmpOffsets, _offsets);
}
}
if (hasMultiValue()) {
auto tmpIdx = attribute::LoadUtils::loadIDX(*this);
size_t tmpIdxLen(tmpIdx->size(sizeof(uint32_t)));
_idx.clear();
_idx.reserve(tmpIdxLen);
uint32_t prev(0);
const uint32_t * idxPtr(static_cast<const uint32_t *>(tmpIdx->buffer()));
for (size_t i=0; i < tmpIdxLen; i++) {
checkSetMaxValueCount(idxPtr[i] - prev);
prev = idxPtr[i];
_idx.push_back(prev);
}
rc = tmpIdx.get();
tmpIdx.reset();
}
uint32_t numDocs(hasMultiValue() ? (_idx.size()-1) : _offsets.size());
setNumDocs(numDocs);
setCommittedDocIdLimit(numDocs);
}
// update statistics
uint64_t numValues = _offsets.size();
uint64_t numUniqueValues = _offsets.size();
uint64_t allocated = _buffer.size() * sizeof(char) + _offsets.size() * sizeof(uint32_t) +
+ _idx.size() * sizeof(uint32_t);
this->updateStatistics(numValues, numUniqueValues, allocated, allocated, 0, 0);
return rc;
}
void StringDirectAttribute::onCommit()
{
LOG_ABORT("should not be reached");
}
bool StringDirectAttribute::addDoc(DocId & doc)
{
(void) doc;
return false;
}
} // namespace search
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