Function readArrayV1

src/api/c/stream.cpp:175–256

}

static af_array readArrayV1(const char *filename, const unsigned index) {
    char version = 0;
    int n_arrays = 0;

    std::fstream fs(filename, std::fstream::in | std::fstream::binary);

    // Throw exception if file is not open
    if (!fs.is_open()) { AF_ERROR("File failed to open", AF_ERR_ARG); }

    if (fs.peek() == std::fstream::traits_type::eof()) {
        AF_ERROR("File is empty", AF_ERR_ARG);
    }

    fs.read(&version, sizeof(char));
    fs.read(reinterpret_cast<char *>(&n_arrays), sizeof(int));

    AF_ASSERT((int)index < n_arrays, "Index out of bounds");

    for (unsigned i = 0; i < index; i++) {
        // (int    )   Length of the key
        // (cstring)   Key
        // (intl   )   Offset bytes to next array (type + dims + data)
        // (char   )   Type
        // (intl   )   dim4 (x 4)
        // (T      )   data (x elements)
        int klen = -1;
        fs.read(reinterpret_cast<char *>(&klen), sizeof(int));

        // char* key = new char[klen];
        // fs.read((char*)&key, klen * sizeof(char));

        // Skip the array name tag
        fs.seekg(klen, std::ios_base::cur);

        // Read data offset
        intl offset = -1;
        fs.read(reinterpret_cast<char *>(&offset), sizeof(intl));

        // Skip data
        fs.seekg(offset, std::ios_base::cur);
    }

    int klen = -1;
    fs.read(reinterpret_cast<char *>(&klen), sizeof(int));

    // char* key = new char[klen];
    // fs.read((char*)&key, klen * sizeof(char));

    // Skip the array name tag
    fs.seekg(klen, std::ios_base::cur);

    // Read data offset
    intl offset = -1;
    fs.read(reinterpret_cast<char *>(&offset), sizeof(intl));

    // Read type and dims
    char type_ = -1;
    fs.read(&type_, sizeof(char));