ZealOS/docs/Demo/Lectures/NegDisp.ZC.html
2021-12-11 06:10:58 -05:00

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<a name="l1"></a><span class=cF1>class</span><span class=cF0> Person
<a name="l2"></a>{
<a name="l3"></a> </span><span class=cF1>U8</span><span class=cF0> first [</span><span class=cFE>32</span><span class=cF0>];
<a name="l4"></a> </span><span class=cF1>U8</span><span class=cF0> last [</span><span class=cFE>32</span><span class=cF0>];
<a name="l5"></a> </span><span class=cF1>U8</span><span class=cF0> address1 [</span><span class=cFE>64</span><span class=cF0>];
<a name="l6"></a> </span><span class=cF1>U8</span><span class=cF0> address2 [</span><span class=cFE>64</span><span class=cF0>];
<a name="l7"></a> </span><span class=cF1>U8</span><span class=cF0> city [</span><span class=cFE>32</span><span class=cF0>];
<a name="l8"></a> </span><span class=cF1>U8</span><span class=cF0> state_zip [</span><span class=cFE>32</span><span class=cF0>];
<a name="l9"></a>};
<a name="l10"></a>
<a name="l11"></a></span><span class=cF1>U0</span><span class=cF0> OffsetDemo1()
<a name="l12"></a>{
<a name="l13"></a> Person *p = </span><span class=cF5>MAlloc</span><span class=cF0>(</span><span class=cF1>sizeof</span><span class=cF7>(</span><span class=cF0>Person</span><span class=cF7>)</span><span class=cF0>);
<a name="l14"></a>
<a name="l15"></a> </span><span class=cF5>StrCopy</span><span class=cF0>(p-&gt;first, </span><span class=cF6>&quot;Terry&quot;</span><span class=cF0>);
<a name="l16"></a> </span><span class=cF5>StrCopy</span><span class=cF0>(p-&gt;last, </span><span class=cF6>&quot;Davis&quot;</span><span class=cF0>);
<a name="l17"></a> </span><span class=cF5>StrCopy</span><span class=cF0>(p-&gt;address1, </span><span class=cF6>&quot;8144 Sickle Lane&quot;</span><span class=cF0>);
<a name="l18"></a> </span><span class=cF5>StrCopy</span><span class=cF0>(p-&gt;address2, </span><span class=cF6>&quot;&quot;</span><span class=cF0>);
<a name="l19"></a> </span><span class=cF5>StrCopy</span><span class=cF0>(p-&gt;city, </span><span class=cF6>&quot;Las Vegas&quot;</span><span class=cF0>);
<a name="l20"></a> </span><span class=cF5>StrCopy</span><span class=cF0>(p-&gt;state_zip, </span><span class=cF6>&quot;NV 89128&quot;</span><span class=cF0>);
<a name="l21"></a>}
<a name="l22"></a>
<a name="l23"></a></span><span class=cF5>U</span><span class=cF0>(&amp;OffsetDemo1, </span><span class=cFE>34</span><span class=cF0>);
<a name="l24"></a></span><span class=cF5>PressAKey</span><span class=cF0>;
<a name="l25"></a>
<a name="l26"></a></span><span class=cF2>/*</span><span class=cF0>
<a name="l27"></a>
<a name="l28"></a></span><span class=cF2>x86 has signed 8-bit</span><span class=cF0> </span><span class=cF2>displacements</span><span class=cF0>
<a name="l29"></a> </span><span class=cF2>and signed 32-bit displacements.</span><span class=cF0>
<a name="l30"></a>
<a name="l31"></a></span><span class=cF2>This example uses 8-bit negative displacements.</span><span class=cF0>
<a name="l32"></a>
<a name="l33"></a></span><span class=cF2>*/</span><span class=cF0>
<a name="l34"></a>
<a name="l35"></a></span><span class=cF1>class</span><span class=cF0> Person
<a name="l36"></a>{ $ = -</span><span class=cFE>128</span><span class=cF0>;
<a name="l37"></a></span><span class=cF1>U8</span><span class=cF0> first [</span><span class=cFE>32</span><span class=cF0>];
<a name="l38"></a></span><span class=cF1>U8</span><span class=cF0> last [</span><span class=cFE>32</span><span class=cF0>];
<a name="l39"></a></span><span class=cF1>U8</span><span class=cF0> address1 [</span><span class=cFE>64</span><span class=cF0>];
<a name="l40"></a></span><span class=cF1>U8</span><span class=cF0> address2 [</span><span class=cFE>64</span><span class=cF0>];
<a name="l41"></a></span><span class=cF1>U8</span><span class=cF0> city [</span><span class=cFE>32</span><span class=cF0>];
<a name="l42"></a></span><span class=cF1>U8</span><span class=cF0> state_zip [</span><span class=cFE>32</span><span class=cF0>];
<a name="l43"></a>};
<a name="l44"></a>
<a name="l45"></a></span><span class=cF1>U0</span><span class=cF0> OffsetDemo2()
<a name="l46"></a>{
<a name="l47"></a> Person *p = </span><span class=cF5>MAlloc</span><span class=cF0>(</span><span class=cF1>sizeof</span><span class=cF7>(</span><span class=cF0>Person</span><span class=cF7>)</span><span class=cF0>)(</span><span class=cF9>I64</span><span class=cF0>) + </span><span class=cFE>128</span><span class=cF0>;
<a name="l48"></a>
<a name="l49"></a> </span><span class=cF5>StrCopy</span><span class=cF0>(p-&gt;first, </span><span class=cF6>&quot;Terry&quot;</span><span class=cF0>);
<a name="l50"></a> </span><span class=cF5>StrCopy</span><span class=cF0>(p-&gt;last, </span><span class=cF6>&quot;Davis&quot;</span><span class=cF0>);
<a name="l51"></a> </span><span class=cF5>StrCopy</span><span class=cF0>(p-&gt;address1, </span><span class=cF6>&quot;8144 Sickle Lane&quot;</span><span class=cF0>);
<a name="l52"></a> </span><span class=cF5>StrCopy</span><span class=cF0>(p-&gt;address2, </span><span class=cF6>&quot;&quot;</span><span class=cF0>);
<a name="l53"></a> </span><span class=cF5>StrCopy</span><span class=cF0>(p-&gt;city, </span><span class=cF6>&quot;Las Vegas&quot;</span><span class=cF0>);
<a name="l54"></a> </span><span class=cF5>StrCopy</span><span class=cF0>(p-&gt;state_zip, </span><span class=cF6>&quot;NV 89128&quot;</span><span class=cF0>);
<a name="l55"></a>}
<a name="l56"></a>
<a name="l57"></a></span><span class=cF5>U</span><span class=cF0>(&amp;OffsetDemo2, </span><span class=cFE>34</span><span class=cF0>);
<a name="l58"></a></span><span class=cF5>PressAKey</span><span class=cF0>;
</span></pre></body>
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