Method setpos

utils/sbufstream.h:179–186

    }

    static KTX_error_code setpos(ktxStream* str, ktx_off_t offset)
    {
        auto self = parent(str);
        const auto newpos = std::streamoff(offset);
        const std::streampos setpos = self->_streambuf->pubseekoff(newpos, std::ios::beg, self->_seek_mode);
        logstream << "\tsetpos: " << offset << std::endl;
        return (setpos == newpos) ? KTX_SUCCESS : KTX_FILE_SEEK_ERROR;
    }

    static KTX_error_code getsize(ktxStream* str, ktx_size_t* size)
    {