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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "tensor_buffer_type_mapper.h"
#include "tensor_buffer_operations.h"
#include <algorithm>
namespace search::tensor {
TensorBufferTypeMapper::TensorBufferTypeMapper()
: _array_sizes(),
_ops(nullptr)
{
}
TensorBufferTypeMapper::TensorBufferTypeMapper(uint32_t max_small_subspaces_type_id, TensorBufferOperations* ops)
: _array_sizes(),
_ops(ops)
{
_array_sizes.reserve(max_small_subspaces_type_id + 1);
_array_sizes.emplace_back(0); // type id 0 uses LargeSubspacesBufferType
for (uint32_t type_id = 1; type_id <= max_small_subspaces_type_id; ++type_id) {
auto num_subspaces = type_id - 1;
_array_sizes.emplace_back(_ops->get_array_size(num_subspaces));
}
}
TensorBufferTypeMapper::~TensorBufferTypeMapper() = default;
uint32_t
TensorBufferTypeMapper::get_type_id(size_t array_size) const
{
assert(!_array_sizes.empty());
auto result = std::lower_bound(_array_sizes.begin() + 1, _array_sizes.end(), array_size);
if (result == _array_sizes.end()) {
return 0; // type id 0 uses LargeSubspacesBufferType
}
return result - _array_sizes.begin();
}
size_t
TensorBufferTypeMapper::get_array_size(uint32_t type_id) const
{
assert(type_id > 0 && type_id < _array_sizes.size());
return _array_sizes[type_id];
}
}
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