3e2ce5494f
commit 2f56f4c23ea840f9d15c43801368cf4a089efa84 Author: sophgo-forum-service <forum_service@sophgo.com> Date: Sun May 19 23:03:28 2024 +0800 [feat] cnpy opensource for cv18xx soc. - e9d84e
118 lines
3.4 KiB
C++
118 lines
3.4 KiB
C++
//Copyright (C) 2011 Carl Rogers
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//Released under MIT License
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//license available in LICENSE file, or at http://www.opensource.org/licenses/mit-license.php
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#ifndef LIBCNPY_H_
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#define LIBCNPY_H_
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#include<string>
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#include<cstring>
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#include<stdexcept>
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#include<sstream>
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#include<vector>
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#include<cstdio>
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#include<typeinfo>
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#include<iostream>
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#include<cassert>
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#include<zlib.h>
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#include<map>
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#include<memory>
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#include<stdint.h>
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#include<numeric>
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namespace cnpy {
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struct NpyArray {
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NpyArray(const std::vector<size_t>& _shape, size_t _word_size,
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char _type, bool _fortran_order)
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: shape(_shape), word_size(_word_size),
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type(_type), fortran_order(_fortran_order) {
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num_vals = 1;
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for(size_t i = 0;i < shape.size();i++) num_vals *= shape[i];
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data_holder = std::shared_ptr<std::vector<char>>(
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new std::vector<char>(num_vals * word_size));
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}
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NpyArray() : shape(0), word_size(0), type(0), fortran_order(0), num_vals(0) {}
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template<typename T>
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T* data() {
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return reinterpret_cast<T*>(&(*data_holder)[0]);
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}
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template<typename T>
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const T* data() const {
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return reinterpret_cast<T*>(&(*data_holder)[0]);
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}
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template<typename T>
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std::vector<T> as_vec() const {
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const T* p = data<T>();
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return std::vector<T>(p, p+num_vals);
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}
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size_t num_bytes() const {
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return data_holder->size();
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}
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std::shared_ptr<std::vector<char>> data_holder;
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std::vector<size_t> shape;
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size_t word_size;
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char type;
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bool fortran_order;
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size_t num_vals;
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};
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using npz_t = std::map<std::string, NpyArray>;
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std::vector<char> create_npy_header(const std::vector<size_t>& shape,
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size_t word_size, char type);
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void parse_npy_header(FILE* fp,size_t& word_size, char& type,
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std::vector<size_t>& shape, bool& fortran_order);
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void parse_npy_header(unsigned char* buffer, size_t& word_size, char& type,
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std::vector<size_t>& shape, bool& fortran_order);
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void parse_zip_footer(FILE* fp, uint16_t& nrecs, size_t& global_header_size,
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size_t& global_header_offset);
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npz_t npz_load(std::string fname);
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NpyArray npz_load(std::string fname, std::string varname);
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NpyArray npy_load(std::string fname);
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template<typename T>
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std::vector<char>& operator+=(std::vector<char>& lhs, const T rhs);
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template<>
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std::vector<char>& operator+=(std::vector<char>& lhs, const std::string rhs);
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template<>
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std::vector<char>& operator+=(std::vector<char>& lhs, const char* rhs);
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template<typename T>
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void npy_save(std::string fname, const T* data,
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const std::vector<size_t> shape, std::string mode = "w");
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template<typename T>
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void npy_save(std::string fname, const std::vector<T> data,
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std::string mode = "w");
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template<typename T>
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void npz_save(std::string zipname, std::string fname,
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const T* data, const std::vector<size_t>& shape,
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std::string mode = "w");
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template<typename T>
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void npz_save(std::string zipname, std::string fname,
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const std::vector<T> &data, std::string mode = "w");
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template<typename T>
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void npz_save(std::string zipname, std::string fname,
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NpyArray &array, std::string mode = "w");
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template<typename T>
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void npz_add_array(npz_t &map, std::string fname,
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const T* data, const std::vector<size_t> shape);
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template<typename T>
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void npz_add_array(npz_t &map, std::string fname,
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const std::vector<T> &data);
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void npz_save_all(std::string zipname, npz_t &map);
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} // namespace cnpy
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#endif
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