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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "gen_spec.h"
#include <vespa/eval/eval/string_stuff.h>
#include <vespa/vespalib/util/require.h>
#include <vespa/vespalib/util/stringfmt.h>
#include <ostream>
using vespalib::make_string_short::fmt;
namespace vespalib::eval::test {
//-----------------------------------------------------------------------------
Sequence N(double bias) {
return [bias](size_t i) noexcept { return (i + bias); };
}
Sequence AX_B(double a, double b) {
return [a,b](size_t i) noexcept { return (a * i) + b; };
}
Sequence Div16(const Sequence &seq) {
return [seq](size_t i) { return (seq(i) / 16.0); };
}
Sequence Div17(const Sequence &seq) {
return [seq](size_t i) { return (seq(i) / 17.0); };
}
Sequence Sub2(const Sequence &seq) {
return [seq](size_t i) { return (seq(i) - 2.0); };
}
Sequence OpSeq(const Sequence &seq, map_fun_t op) {
return [seq,op](size_t i) { return op(seq(i)); };
}
Sequence SigmoidF(const Sequence &seq) {
return [seq](size_t i) { return (float)operation::Sigmoid::f(seq(i)); };
}
Sequence Seq(const std::vector<double> &seq) {
REQUIRE(!seq.empty());
return [seq](size_t i) noexcept { return seq[i % seq.size()]; };
}
//-----------------------------------------------------------------------------
DimSpec::DimSpec(const vespalib::string &name, size_t size) noexcept
: _name(name), _size(size), _dict()
{
assert(_size);
}
DimSpec::DimSpec(const vespalib::string &name, std::vector<vespalib::string> dict) noexcept
: _name(name), _size(), _dict(std::move(dict))
{
assert(!_size);
}
DimSpec::DimSpec(DimSpec &&) noexcept = default;
DimSpec::DimSpec(const DimSpec &) = default;
DimSpec & DimSpec::operator=(DimSpec &&) noexcept = default;
DimSpec & DimSpec::operator=(const DimSpec &) = default;
DimSpec::~DimSpec() = default;
std::vector<vespalib::string>
DimSpec::make_dict(size_t size, size_t stride, const vespalib::string &prefix)
{
std::vector<vespalib::string> dict;
for (size_t i = 0; i < size; ++i) {
dict.push_back(fmt("%s%zu", prefix.c_str(), (i + 1) * stride));
}
return dict;
}
namespace {
auto is_dim_name = [](char c) {
return ((c >= 'a') && (c <= 'z'))
|| ((c >= 'A') && (c <= 'Z')); };
}
// 'a2' -> DimSpec("a", 2);
// 'b2_3' -> DimSpec("b", make_dict(2, 3, ""));
DimSpec
DimSpec::from_desc(const vespalib::string &desc)
{
size_t idx = 0;
vespalib::string name;
auto is_num = [](char c) { return ((c >= '0') && (c <= '9')); };
auto as_num = [](char c) { return size_t(c - '0'); };
auto is_map_tag = [](char c) { return (c == '_'); };
auto extract_number = [&]() {
REQUIRE(idx < desc.size());
REQUIRE(is_num(desc[idx]));
size_t num = as_num(desc[idx++]);
while ((idx < desc.size()) && is_num(desc[idx])) {
num = (num * 10) + as_num(desc[idx++]);
}
return num;
};
REQUIRE(!desc.empty());
REQUIRE(is_dim_name(desc[idx]));
name.push_back(desc[idx++]);
size_t size = extract_number();
if (idx < desc.size()) {
// mapped
REQUIRE(is_map_tag(desc[idx++]));
size_t stride = extract_number();
REQUIRE(idx == desc.size());
return {name, make_dict(size, stride, "")};
} else {
// indexed
return {name, size};
}
}
// 'a2b12c5' -> GenSpec().idx("a", 2).idx("b", 12).idx("c", 5);
// 'a2_1b3_2c5_1' -> GenSpec().map("a", 2).map("b", 3, 2).map("c", 5);
GenSpec
GenSpec::from_desc(const vespalib::string &desc)
{
size_t idx = 0;
vespalib::string dim_desc;
std::vector<DimSpec> dim_list;
while (idx < desc.size()) {
dim_desc.clear();
REQUIRE(is_dim_name(desc[idx]));
dim_desc.push_back(desc[idx++]);
while ((idx < desc.size()) && !is_dim_name(desc[idx])) {
dim_desc.push_back(desc[idx++]);
}
dim_list.push_back(DimSpec::from_desc(dim_desc));
}
return {std::move(dim_list)};
}
GenSpec::GenSpec(GenSpec &&other) noexcept = default;
GenSpec::GenSpec(const GenSpec &other) = default;
GenSpec &GenSpec::operator=(GenSpec &&other) noexcept = default;
GenSpec &GenSpec::operator=(const GenSpec &other) = default;
GenSpec::~GenSpec() = default;
bool
GenSpec::bad_scalar() const
{
return (_dims.empty() && (_cells != CellType::DOUBLE));
}
ValueType
GenSpec::type() const
{
std::vector<ValueType::Dimension> dim_types;
for (const auto &dim: _dims) {
dim_types.push_back(dim.type());
}
auto type = ValueType::make_type(_cells, dim_types);
REQUIRE(!type.is_error());
return type;
}
TensorSpec
GenSpec::gen() const
{
size_t idx = 0;
TensorSpec::Address addr;
REQUIRE(!bad_scalar());
TensorSpec result(type().to_spec());
std::function<void(size_t)> add_cells = [&](size_t dim_idx) {
if (dim_idx == _dims.size()) {
result.add(addr, _seq(idx++));
} else {
const auto &dim = _dims[dim_idx];
for (size_t i = 0; i < dim.size(); ++i) {
addr.insert_or_assign(dim.name(), dim.label(i));
add_cells(dim_idx + 1);
}
}
};
add_cells(0);
return result.normalize();
}
std::ostream &operator<<(std::ostream &out, const GenSpec &spec)
{
out << spec.gen();
return out;
}
} // namespace
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