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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "fixedwidthbucketfunctionnode.h"
#include "integerresultnode.h"
#include "floatresultnode.h"
#include "integerbucketresultnode.h"
#include "floatbucketresultnode.h"
#include "resultvector.h"
#include <vespa/vespalib/util/stringfmt.h>
#include <stdexcept>
#include <cmath>
#include <limits>
namespace search::expression {
IMPLEMENT_EXPRESSIONNODE(FixedWidthBucketFunctionNode, UnaryFunctionNode);
void
FixedWidthBucketFunctionNode::IntegerBucketHandler::update(ResultNode &result, const ResultNode &value) const
{
IntegerBucketResultNode &bucket = (IntegerBucketResultNode &)result;
int64_t n = value.getInteger();
int64_t from = n;
int64_t to = n;
if (width > 0) {
if (n >= 0) {
from = (n/width) * width;
if (from >= (std::numeric_limits<int64_t>::max() - width)) {
to = std::numeric_limits<int64_t>::max();
} else {
to = from + width;
}
} else {
to = ((n+1)/width) * width;
if (to <= (std::numeric_limits<int64_t>::min() + width)) {
from = std::numeric_limits<int64_t>::min();
} else {
from = to - width;
}
}
}
bucket.setRange(from, to);
}
void
FixedWidthBucketFunctionNode::IntegerVectorBucketHandler::update(ResultNode &result, const ResultNode &value) const
{
const IntegerResultNodeVector::Vector & v(static_cast<const IntegerResultNodeVector &>(value).getVector());
IntegerBucketResultNodeVector::Vector & r(static_cast<IntegerBucketResultNodeVector &>(result).getVector());
r.resize(v.size());
for (size_t i(0), m(v.size()); i < m; i++) {
IntegerBucketHandler::update(r[i], v[i]);
}
}
void
FixedWidthBucketFunctionNode::FloatVectorBucketHandler::update(ResultNode &result, const ResultNode &value) const
{
const FloatResultNodeVector::Vector & v(static_cast<const FloatResultNodeVector &>(value).getVector());
FloatBucketResultNodeVector::Vector & r(static_cast<FloatBucketResultNodeVector &>(result).getVector());
r.resize(v.size());
for (size_t i(0), m(v.size()); i < m; i++) {
FloatBucketHandler::update(r[i], v[i]);
}
}
void
FixedWidthBucketFunctionNode::FloatBucketHandler::update(ResultNode &result, const ResultNode &value) const
{
FloatBucketResultNode &bucket = (FloatBucketResultNode &)result;
double n = value.getFloat();
double from = n;
double to = n;
if (width > 0.0) {
double tmp = std::floor(n/width);
from = tmp * width;
to = (tmp+1) * width;
}
bucket.setRange(from, to);
}
FixedWidthBucketFunctionNode::~FixedWidthBucketFunctionNode() = default;
void
FixedWidthBucketFunctionNode::onPrepareResult()
{
const ExpressionNode &child = getArg();
const ResultNode &input = *child.getResult();
if (input.getClass().inherits(IntegerResultNode::classId)) {
setResultType(std::make_unique<IntegerBucketResultNode>());
_bucketHandler.reset(new IntegerBucketHandler(_width->getInteger()));
} else if (input.getClass().inherits(FloatResultNode::classId)) {
setResultType(std::make_unique<FloatBucketResultNode>());
_bucketHandler.reset(new FloatBucketHandler(_width->getFloat()));
} else if (input.getClass().inherits(IntegerResultNodeVector::classId)) {
setResultType(std::make_unique<IntegerBucketResultNodeVector>());
_bucketHandler.reset(new IntegerVectorBucketHandler(_width->getInteger()));
} else if (input.getClass().inherits(FloatResultNodeVector::classId)) {
setResultType(std::make_unique<FloatBucketResultNodeVector>());
_bucketHandler.reset(new FloatVectorBucketHandler(_width->getFloat()));
} else {
throw std::runtime_error(vespalib::make_string("cannot create appropriate bucket for type '%s'", input.getClass().name()));
}
}
bool
FixedWidthBucketFunctionNode::onExecute() const
{
getArg().execute();
_bucketHandler->update(updateResult(), *getArg().getResult());
return true;
}
vespalib::Serializer &
FixedWidthBucketFunctionNode::onSerialize(vespalib::Serializer &os) const
{
UnaryFunctionNode::onSerialize(os);
return os << _width;
}
vespalib::Deserializer &
FixedWidthBucketFunctionNode::onDeserialize(vespalib::Deserializer &is)
{
UnaryFunctionNode::onDeserialize(is);
return is >> _width;
}
}
// this function was added by ../../forcelink.sh
void forcelink_file_searchlib_expression_fixedwidthbucketfunctionnode() {}
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