https://forge.codesys.com/forge/talk/Engineering/thread/614d6cb4d3/2020-02-27T14:22:53.519000ZRecent posts to hide/encapsulate/protect content of a library2020-02-27T14:22:53.519000Z2020-02-27T14:22:53.519000Zkurvanovhttps://forge.codesys.com/u/kurvanov/https://forge.codesys.com172d355afb4950304529d14ab01dc45eebe3b139

<div class="markdown_content"><p>Hello <br/> I am currently writing a library in which I have following structs</p> <div class="codehilite"><pre><span></span><span class="k">TYPE</span> <span class="n">Input_com</span><span class="p">:</span> <span class="err"> </span> <span class="err"> </span><span class="n">STRUCT</span> <span class="err"> </span> <span class="err">  </span> <span class="err"> </span><span class="n">In_bit</span> <span class="nb">ARRAY</span> <span class="p">[</span><span class="mi">0</span><span class="p">..</span><span class="mi">15</span><span class="p">]</span> <span class="k">OF</span> <span class="nb">BIT</span><span class="p">;</span> <span class="err"> </span> <span class="err">  </span> <span class="err"> </span><span class="n">In_Word</span> <span class="nb">ARRAY</span> <span class="p">[</span><span class="mi">0</span><span class="p">..</span><span class="mi">10</span><span class="p">]</span> <span class="k">OF</span> <span class="n">WORD</span><span class="p">;</span> <span class="err"> </span> <span class="err">  </span> <span class="err"> </span><span class="n">In_Float</span> <span class="nb">ARRAY</span> <span class="p">[</span><span class="mi">0</span><span class="p">..</span><span class="mi">10</span><span class="p">]</span> <span class="k">OF</span> <span class="nb">REAL</span> <span class="err"> </span> <span class="err"> </span><span class="n">END_STRUCT</span><span class="p">;</span> <span class="n">END_TYPE</span> <span class="k">TYPE</span> <span class="n">Com_protocol</span><span class="p">:</span> <span class="err"> </span> <span class="err"> </span><span class="n">STRUCT</span> <span class="err"> </span> <span class="err">  </span> <span class="err"> </span><span class="n">inputData</span><span class="err"> </span> <span class="err"> </span> <span class="err"> </span><span class="k">AT</span><span class="o">%</span><span class="n">I</span><span class="o">*</span><span class="err"> </span> <span class="err"> </span> <span class="err"> </span> <span class="err"> </span> <span class="err"> </span> <span class="err"> </span><span class="p">:</span> <span class="n">Input_com</span><span class="p">;</span> <span class="err"> </span> <span class="err"> </span> <span class="err"> </span> <span class="err"> </span> <span class="err"> </span> <span class="err"> </span> <span class="err"> </span> <span class="err"> </span> <span class="p">......</span> <span class="err"> </span> <span class="err"> </span><span class="n">END_STRUCT</span><span class="p">;</span> <span class="n">END_TYPE</span> </pre></div> <p>My library includes getters/setters for reading/writing into the members of the struct. But nevertheless, when a user is adding my library into his project, he must define a variable of Com_protocol Type for setting up the address of the inputs </p> <div class="codehilite"><pre><span></span><span class="n">VAR</span> <span class="err"> </span> <span class="err"> </span> <span class="n">ST_InComm</span><span class="err"> </span> <span class="p">:</span> <span class="n">PKR</span><span class="p">.</span><span class="n">Com_protocol</span><span class="p">;</span><span class="err"> </span> <span class="o">//</span> <span class="p">(</span><span class="n">PKR</span> <span class="k">is</span> <span class="n">the</span> <span class="n">namespace</span><span class="p">)</span> <span class="n">END_VAR</span> </pre></div> <p>Thus, he can directly read data from the struct (and indirectly from the Inputs). This is something I would like to avoid because of safety reason, I would like to force him using the dedicated 'getters'<br/> Is there a way to do this ?<br/> I would appreciate any help on that matter.<br/> kurvanov</p></div>