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// Copyright (c) 2020-2023, ARM Limited.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef _TOSA_NUMPY_UTILS_H
#define _TOSA_NUMPY_UTILS_H
#include <cassert>
#include <cctype>
#include <cstdint>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <vector>
#include "half.hpp"
class NumpyUtilities
{
public:
enum NPError
{
NO_ERROR = 0,
FILE_NOT_FOUND,
FILE_IO_ERROR,
FILE_TYPE_MISMATCH,
HEADER_PARSE_ERROR,
BUFFER_SIZE_MISMATCH,
DATA_TYPE_NOT_SUPPORTED,
};
template <typename T>
static const char* getDTypeString(bool& is_bool)
{
is_bool = false;
if (std::is_same<T, bool>::value)
{
is_bool = true;
return "'|b1'";
}
if (std::is_same<T, uint8_t>::value)
{
return "'|u1'";
}
if (std::is_same<T, int8_t>::value)
{
return "'|i1'";
}
if (std::is_same<T, uint16_t>::value)
{
return "'<u2'";
}
if (std::is_same<T, int16_t>::value)
{
return "'<i2'";
}
if (std::is_same<T, int32_t>::value)
{
return "'<i4'";
}
if (std::is_same<T, int64_t>::value)
{
return "'<i8'";
}
if (std::is_same<T, float>::value)
{
return "'<f4'";
}
if (std::is_same<T, double>::value)
{
return "'<f8'";
}
if (std::is_same<T, half_float::half>::value)
{
return "'<f2'";
}
assert(false && "unsupported Dtype");
};
template <typename T>
static NPError writeToNpyFile(const char* filename, const uint32_t elems, const T* databuf)
{
std::vector<int32_t> shape = { static_cast<int32_t>(elems) };
return writeToNpyFile(filename, shape, databuf);
}
template <typename T>
static NPError writeToNpyFile(const char* filename, const std::vector<int32_t>& shape, const T* databuf)
{
bool is_bool;
const char* dtype_str = getDTypeString<T>(is_bool);
return writeToNpyFileCommon(filename, dtype_str, sizeof(T), shape, databuf, is_bool);
}
template <typename T>
static NPError readFromNpyFile(const char* filename, const uint32_t elems, T* databuf)
{
bool is_bool;
const char* dtype_str = getDTypeString<T>(is_bool);
return readFromNpyFileCommon(filename, dtype_str, sizeof(T), elems, databuf, is_bool);
}
template <typename D, typename S>
static void copyBufferByElement(D* dest_buf, S* src_buf, int num)
{
static_assert(sizeof(D) >= sizeof(S), "The size of dest_buf must be equal to or larger than that of src_buf");
for (int i = 0; i < num; ++i)
{
dest_buf[i] = src_buf[i];
}
}
private:
static NPError writeToNpyFileCommon(const char* filename,
const char* dtype_str,
const size_t elementsize,
const std::vector<int32_t>& shape,
const void* databuf,
bool bool_translate);
static NPError readFromNpyFileCommon(const char* filename,
const char* dtype_str,
const size_t elementsize,
const uint32_t elems,
void* databuf,
bool bool_translate);
static NPError checkNpyHeader(FILE* infile, const uint32_t elems, const char* dtype_str);
static NPError getHeader(FILE* infile, bool& is_signed, int& bit_length, char& byte_order);
static NPError writeNpyHeader(FILE* outfile, const std::vector<int32_t>& shape, const char* dtype_str);
};
template <>
NumpyUtilities::NPError NumpyUtilities::readFromNpyFile(const char* filename, const uint32_t elems, int32_t* databuf);
#endif // _TOSA_NUMPY_UTILS_H
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