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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "fast_value.h"
#include <vespa/vespalib/util/typify.h>
#include "fast_value.hpp"
namespace vespalib::eval {
//-----------------------------------------------------------------------------
namespace {
struct CreateFastValueBuilderBase {
template <typename T, typename R2> static std::unique_ptr<ValueBuilderBase> invoke(const ValueType &type,
size_t num_mapped_dims, size_t subspace_size, size_t expected_subspaces)
{
assert(check_cell_type<T>(type.cell_type()));
if (type.is_double()) {
return std::make_unique<FastDoubleValueBuilder>();
} else if (num_mapped_dims == 0) {
return std::make_unique<FastDenseValue<T>>(type, subspace_size);
} else {
return std::make_unique<FastValue<T,R2::value>>(type, num_mapped_dims, subspace_size, expected_subspaces);
}
}
};
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// look up a full address in the map directly
struct FastLookupView : public Value::Index::View {
const FastAddrMap ↦
size_t subspace;
FastLookupView(const FastAddrMap &map_in)
: map(map_in), subspace(FastAddrMap::npos()) {}
void lookup(ConstArrayRef<const string_id*> addr) override {
subspace = map.lookup(addr);
}
bool next_result(ConstArrayRef<string_id*>, size_t &idx_out) override {
if (subspace == FastAddrMap::npos()) {
return false;
}
idx_out = subspace;
subspace = FastAddrMap::npos();
return true;
}
};
//-----------------------------------------------------------------------------
// iterate all mappings
struct FastIterateView : public Value::Index::View {
const FastAddrMap ↦
size_t pos;
FastIterateView(const FastAddrMap &map_in)
: map(map_in), pos(FastAddrMap::npos()) {}
void lookup(ConstArrayRef<const string_id*>) override {
pos = 0;
}
bool next_result(ConstArrayRef<string_id*> addr_out, size_t &idx_out) override {
if (pos >= map.size()) {
return false;
}
auto addr = map.get_addr(pos);
assert(addr.size() == addr_out.size());
for (size_t i = 0; i < addr.size(); ++i) {
*addr_out[i] = addr[i];
}
idx_out = pos++;
return true;
}
};
// find matching mappings for a partial address with brute force filtering
struct FastFilterView : public Value::Index::View {
const FastAddrMap ↦
SmallVector<size_t> match_dims;
SmallVector<size_t> extract_dims;
SmallVector<string_id> query;
size_t pos;
bool is_match(ConstArrayRef<string_id> addr) const {
for (size_t i = 0; i < query.size(); ++i) {
if (query[i] != addr[match_dims[i]]) {
return false;
}
}
return true;
}
FastFilterView(const FastAddrMap &map_in, ConstArrayRef<size_t> match_dims_in) __attribute__((noinline));
FastFilterView(const FastFilterView &) = delete;
FastFilterView & operator =(const FastFilterView &) = delete;
~FastFilterView() override;
void lookup(ConstArrayRef<const string_id*> addr) override {
assert(addr.size() == query.size());
for (size_t i = 0; i < addr.size(); ++i) {
query[i] = *addr[i];
}
pos = 0;
}
bool next_result(ConstArrayRef<string_id*> addr_out, size_t &idx_out) override {
while (pos < map.size()) {
auto addr = map.get_addr(pos);
if (is_match(addr)) {
assert(addr_out.size() == extract_dims.size());
for (size_t i = 0; i < extract_dims.size(); ++i) {
*addr_out[i] = addr[extract_dims[i]];
}
idx_out = pos++;
return true;
}
++pos;
}
return false;
}
};
FastFilterView::FastFilterView(const FastAddrMap &map_in, ConstArrayRef<size_t> match_dims_in)
: map(map_in), match_dims(match_dims_in.begin(), match_dims_in.end()),
extract_dims(), query(match_dims.size()), pos(FastAddrMap::npos())
{
auto my_pos = match_dims.begin();
for (size_t i = 0; i < map.addr_size(); ++i) {
if ((my_pos == match_dims.end()) || (*my_pos != i)) {
extract_dims.push_back(i);
} else {
++my_pos;
}
}
assert(my_pos == match_dims.end());
assert((match_dims.size() + extract_dims.size()) == map.addr_size());
}
FastFilterView::~FastFilterView() = default;
} // namespace <unnamed>
//-----------------------------------------------------------------------------
std::unique_ptr<Value::Index::View>
FastValueIndex::create_view(ConstArrayRef<size_t> dims) const
{
if (map.addr_size() == 0) {
return TrivialIndex::get().create_view(dims);
} else if (dims.empty()) {
return std::make_unique<FastIterateView>(map);
} else if (dims.size() == map.addr_size()) {
return std::make_unique<FastLookupView>(map);
} else {
return std::make_unique<FastFilterView>(map, dims);
}
}
//-----------------------------------------------------------------------------
FastValueBuilderFactory::FastValueBuilderFactory() = default;
FastValueBuilderFactory FastValueBuilderFactory::_factory;
std::unique_ptr<ValueBuilderBase>
FastValueBuilderFactory::create_value_builder_base(const ValueType &type, bool transient, size_t num_mapped_dims, size_t subspace_size,
size_t expected_subspaces) const
{
using MyTypify = TypifyValue<TypifyCellType,TypifyBool>;
return typify_invoke<2,MyTypify,CreateFastValueBuilderBase>(type.cell_type(), transient, type, num_mapped_dims, subspace_size, expected_subspaces);
}
//-----------------------------------------------------------------------------
}
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