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
71 lines
2.4 KiB
C++
71 lines
2.4 KiB
C++
#include"cnpy.h"
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#include<complex>
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#include<cstdlib>
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#include<iostream>
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#include<map>
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#include<string>
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const int Nx = 128;
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const int Ny = 64;
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const int Nz = 32;
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int main()
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{
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//set random seed so that result is reproducible (for testing)
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srand(0);
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//create random data
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std::vector<std::complex<double>> data(Nx*Ny*Nz);
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for(int i = 0;i < Nx*Ny*Nz;i++) data[i] = std::complex<double>(rand(),rand());
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//save it to file
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cnpy::npy_save("arr1.npy",&data[0],{Nz,Ny,Nx},"w");
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//load it into a new array
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cnpy::NpyArray arr = cnpy::npy_load("arr1.npy");
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std::complex<double>* loaded_data = arr.data<std::complex<double>>();
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//make sure the loaded data matches the saved data
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assert(arr.word_size == sizeof(std::complex<double>));
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assert(arr.shape.size() == 3 && arr.shape[0] == Nz && arr.shape[1] == Ny && arr.shape[2] == Nx);
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for(int i = 0; i < Nx*Ny*Nz;i++) assert(data[i] == loaded_data[i]);
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//append the same data to file
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//npy array on file now has shape (Nz+Nz,Ny,Nx)
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cnpy::npy_save("arr1.npy",&data[0],{Nz,Ny,Nx},"a");
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//now write to an npz file
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//non-array variables are treated as 1D arrays with 1 element
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double myVar1 = 1.2;
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char myVar2 = 'a';
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cnpy::npz_save("out.npz","myVar1",&myVar1,{1},"w"); //"w" overwrites any existing file
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cnpy::npz_save("out.npz","myVar2",&myVar2,{1},"a"); //"a" appends to the file we created above
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cnpy::npz_save("out.npz","arr1",&data[0],{Nz,Ny,Nx},"a"); //"a" appends to the file we created above
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//load a single var from the npz file
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cnpy::NpyArray arr2 = cnpy::npz_load("out.npz","arr1");
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//load the entire npz file
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cnpy::npz_t my_npz = cnpy::npz_load("out.npz");
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// add a new array
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std::vector<std::complex<double>> new_data(20);
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for(int i = 0;i < 20;i++)
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new_data[i] = std::complex<double>(i, 20 - i);
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cnpy::npz_add_array<std::complex<double> >(my_npz, "new_arr", new_data);
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//save the entire npz file back
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// TODO: this has some problem, because npz_save_all() is assuming
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// all array in same type, this is because NPArray struct does not
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// convey a type info.
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cnpy::npz_save_all("out_new.npz", my_npz);
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//check that the loaded myVar1 matches myVar1
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cnpy::NpyArray arr_mv1 = my_npz["myVar1"];
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double* mv1 = arr_mv1.data<double>();
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assert(arr_mv1.shape.size() == 1 && arr_mv1.shape[0] == 1);
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assert(mv1[0] == myVar1);
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return 0;
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}
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