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// ----------------------------------------------------------------------------
// - Open3D: www.open3d.org -
// ----------------------------------------------------------------------------
// Copyright (c) 2018-2024 www.open3d.org
// SPDX-License-Identifier: MIT
// ----------------------------------------------------------------------------
#include "pybind/pybind_utils.h"
#include <string>
#include "open3d/core/Dtype.h"
#include "open3d/core/Tensor.h"
#include "pybind/open3d_pybind.h"
namespace open3d {
namespace pybind_utils {
core::Dtype ArrayFormatToDtype(const std::string& format, size_t byte_size) {
// In general, format characters follows the standard:
// https://docs.python.org/3/library/struct.html#format-characters
//
// However, some integer dtypes have aliases. E.g. "l" can be 4 bytes or 8
// bytes depending on the OS. To be safe, we always check the byte size.
if (format == py::format_descriptor<float>::format() && byte_size == 4)
return core::Float32;
if (format == py::format_descriptor<double>::format() && byte_size == 8)
return core::Float64;
if (format == py::format_descriptor<int8_t>::format() && byte_size == 1)
return core::Int8;
if (format == py::format_descriptor<int16_t>::format() && byte_size == 2)
return core::Int16;
if ((format == py::format_descriptor<int32_t>::format() || format == "i" ||
format == "l") &&
byte_size == 4)
return core::Int32;
if ((format == py::format_descriptor<int64_t>::format() || format == "q" ||
format == "l") &&
byte_size == 8)
return core::Int64;
if (format == py::format_descriptor<uint8_t>::format() && byte_size == 1)
return core::UInt8;
if (format == py::format_descriptor<uint16_t>::format() && byte_size == 2)
return core::UInt16;
if ((format == py::format_descriptor<uint32_t>::format() ||
format == "L") &&
byte_size == 4)
return core::UInt32;
if ((format == py::format_descriptor<uint64_t>::format() ||
format == "L") &&
byte_size == 8)
return core::UInt64;
if (format == py::format_descriptor<bool>::format() && byte_size == 1)
return core::Bool;
utility::LogError(
"ArrayFormatToDtype: unsupported python array format {} with "
"byte_size {}.",
format, byte_size);
return core::Undefined;
}
std::string DtypeToArrayFormat(const core::Dtype& dtype) {
if (dtype == core::Float32) return py::format_descriptor<float>::format();
if (dtype == core::Float64) return py::format_descriptor<double>::format();
if (dtype == core::Int8) return py::format_descriptor<int8_t>::format();
if (dtype == core::Int16) return py::format_descriptor<int16_t>::format();
if (dtype == core::Int32) return py::format_descriptor<int32_t>::format();
if (dtype == core::Int64) return py::format_descriptor<int64_t>::format();
if (dtype == core::UInt8) return py::format_descriptor<uint8_t>::format();
if (dtype == core::UInt16) return py::format_descriptor<uint16_t>::format();
if (dtype == core::UInt32) return py::format_descriptor<uint32_t>::format();
if (dtype == core::UInt64) return py::format_descriptor<uint64_t>::format();
if (dtype == core::Bool) return py::format_descriptor<bool>::format();
utility::LogError("Unsupported data type.");
return std::string();
}
} // namespace pybind_utils
} // namespace open3d
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