| 54 | } |
| 55 | |
| 56 | void read_mnist_labels(string label_file, vector<unsigned> &labels) { |
| 57 | ifstream file (label_file, ios::binary); |
| 58 | if (file.is_open()) { |
| 59 | int magic_number = 0; |
| 60 | int number_of_images = 0; |
| 61 | file.read((char*)&magic_number, sizeof(magic_number)); |
| 62 | magic_number = ReverseInt(magic_number); |
| 63 | file.read((char*)&number_of_images, sizeof(number_of_images)); |
| 64 | number_of_images = ReverseInt(number_of_images); |
| 65 | for (int i = 0; i < number_of_images; ++i) { |
| 66 | unsigned char temp = 0; |
| 67 | file.read((char*)&temp, sizeof(temp)); |
| 68 | labels.push_back((unsigned)temp); |
| 69 | } |
| 70 | }else { |
| 71 | stringstream ss; |
| 72 | ss << "Error with input file " << label_file; |
| 73 | throw runtime_error(ss.str()); |
| 74 | } |
| 75 | } |
| 76 | |
| 77 | #endif |