Function decompress_zlib

src/gpu/cl/ClKernelLibrary.cpp:126–161

Decompress a zlib compressed string * * @param[in] str ZLib compressed string * * @return The decompressed string if successful, otherwise false. */

 * @return The decompressed string if successful, otherwise false.
 */
std::string decompress_zlib(const std::string &str)
{
    // Create and initialize decompression stream
    z_stream ds{};
    if (inflateInit(&ds) != Z_OK)
    {
        return std::string();
    }
    ds.avail_in = str.size();
    ds.next_in  = (Bytef *)str.data();

    // Roll-over the string using a buffer and decompress
    int         status = Z_OK;
    char        roll_buff[16384];
    std::string inflated_str;
    do
    {
        ds.avail_out = sizeof(roll_buff);
        ds.next_out  = reinterpret_cast<Bytef *>(roll_buff);

        status = inflate(&ds, 0);
        if (inflated_str.size() < ds.total_out)
        {
            inflated_str.append(roll_buff, ds.total_out - inflated_str.size());
        }
    } while (status == Z_OK);

    // Finalize decompression stream
    inflateEnd(&ds);
    if (status != Z_STREAM_END)
    {
        return std::string();
    }

    return inflated_str;
}
} // namespace
#endif /* ARM_COMPUTE_COMPRESSED_KERNELS */