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ZealOS/docs/Kernel/QuickSort.CC.html
TomAwezome 1b75d91002 Fix Mount AHCI Port selection. 
Add arg to SATARep to specify drive types to show.
Add checks in AHCIPortInit to verify port signatures, add helper method to get signatures from port.
2021-08-02 16:40:05 -04:00

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<a name="l1"></a><span class=cF1>U0</span><span class=cF0> </span><span class=cF5>QuickSortI64</span><span class=cF0>(</span><span class=cF9>I64</span><span class=cF0> *base, </span><span class=cF9>I64</span><span class=cF0> num, </span><span class=cF9>I64</span><span class=cF0> </span><span class=cF7>(</span><span class=cF0>*fp_compare</span><span class=cF7>)(</span><span class=cF9>I64</span><span class=cF0> e1, </span><span class=cF9>I64</span><span class=cF0> e2</span><span class=cF7>)</span><span class=cF0>)
<a name="l2"></a>{</span><span class=cF2>/*Quick Sort for width==8.</span><span class=cF0>
<a name="l3"></a></span><span class=cF2>fp_compare() passes by value instead of ref.</span><span class=cF0>
<a name="l4"></a>
<a name="l5"></a></span><span class=cF2>For ascending strings: return StrCompare(e1,e2);</span><span class=cF0>
<a name="l6"></a></span><span class=cF2>For ascending ints</span><span class=cF0> </span><span class=cF2> : return e1-e2;</span><span class=cF0>
<a name="l7"></a>
<a name="l8"></a></span><span class=cF2>Maybe, look at </span><a href="https://zeal-operating-system.github.io/ZealOS/Demo/MultiCore/MPRadix.CC.html#l1"><span class=cF4>::/Demo/MultiCore/MPRadix.CC</span></a><span class=cF2>.</span><span class=cF0>
<a name="l9"></a></span><span class=cF2>*/</span><span class=cF0>
<a name="l10"></a> </span><span class=cF9>I64</span><span class=cF0> i, *left, *right, pivot;
<a name="l11"></a>
<a name="l12"></a> </span><span class=cF1>if</span><span class=cF0> (num &gt; </span><span class=cFE>1</span><span class=cF0>)
<a name="l13"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l14"></a> left = base;
<a name="l15"></a> right = base + num - </span><span class=cFE>1</span><span class=cF0>;
<a name="l16"></a> pivot = base[num / </span><span class=cFE>2</span><span class=cF0>];
<a name="l17"></a> </span><span class=cF1>do</span><span class=cF0>
<a name="l18"></a> {
<a name="l19"></a> </span><span class=cF1>while</span><span class=cF0> (</span><span class=cF7>(</span><span class=cF0>*fp_compare</span><span class=cF7>)(</span><span class=cF0>*left, pivot</span><span class=cF7>)</span><span class=cF0> &lt; </span><span class=cFE>0</span><span class=cF0>)
<a name="l20"></a> left++;
<a name="l21"></a> </span><span class=cF1>while</span><span class=cF0> (</span><span class=cF7>(</span><span class=cF0>*fp_compare</span><span class=cF7>)(</span><span class=cF0>*right, pivot</span><span class=cF7>)</span><span class=cF0> &gt; </span><span class=cFE>0</span><span class=cF0>)
<a name="l22"></a> right--;
<a name="l23"></a> </span><span class=cF1>if</span><span class=cF0> (left &lt;= right)
<a name="l24"></a> </span><span class=cF5>SwapI64</span><span class=cF0>(left++, right--);
<a name="l25"></a> }
<a name="l26"></a> </span><span class=cF1>while</span><span class=cF0> (left &lt;= right);
<a name="l27"></a>
<a name="l28"></a> i = right + </span><span class=cFE>1</span><span class=cF0> - base;
<a name="l29"></a> </span><span class=cF1>if</span><span class=cF0> (</span><span class=cFE>1</span><span class=cF0> &lt; i &lt; num)
<a name="l30"></a> </span><span class=cF5>QuickSortI64</span><span class=cF0>(base, i, fp_compare);
<a name="l31"></a> i = base + num - left;
<a name="l32"></a> </span><span class=cF1>if</span><span class=cF0> (</span><span class=cFE>1</span><span class=cF0> &lt; i &lt; num)
<a name="l33"></a> </span><span class=cF5>QuickSortI64</span><span class=cF0>(left, i, fp_compare);
<a name="l34"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l35"></a>}
<a name="l36"></a>
<a name="l37"></a></span><span class=cF1>U0</span><span class=cF0> </span><span class=cFD>QuickSort2a</span><span class=cF0>(</span><span class=cF1>U8</span><span class=cF0> **base, </span><span class=cF9>I64</span><span class=cF0> num, </span><span class=cF9>I64</span><span class=cF0> </span><span class=cF7>(</span><span class=cF0>*fp_compare</span><span class=cF7>)(</span><span class=cF1>U8</span><span class=cF0> **_e1, </span><span class=cF1>U8</span><span class=cF0> **_e2</span><span class=cF7>)</span><span class=cF0>)
<a name="l38"></a>{</span><span class=cF2>//Not public.For case of width==size(U8 *)==8.</span><span class=cF0>
<a name="l39"></a></span><span class=cF2>//fp_compare() passes by ref.</span><span class=cF0>
<a name="l40"></a> </span><span class=cF9>I64</span><span class=cF0> i;
<a name="l41"></a> </span><span class=cF1>U8</span><span class=cF0> **left, **right, *pivot;
<a name="l42"></a>
<a name="l43"></a> left = base;
<a name="l44"></a> right = base + num - </span><span class=cFE>1</span><span class=cF0>;
<a name="l45"></a> pivot = base[num / </span><span class=cFE>2</span><span class=cF0>];
<a name="l46"></a> </span><span class=cF1>do</span><span class=cF0>
<a name="l47"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l48"></a> </span><span class=cF1>while</span><span class=cF0> (</span><span class=cF7>(</span><span class=cF0>*fp_compare</span><span class=cF7>)(</span><span class=cF0>left, &amp;pivot</span><span class=cF7>)</span><span class=cF0> &lt; </span><span class=cFE>0</span><span class=cF0>)
<a name="l49"></a> left++;
<a name="l50"></a> </span><span class=cF1>while</span><span class=cF0> (</span><span class=cF7>(</span><span class=cF0>*fp_compare</span><span class=cF7>)(</span><span class=cF0>right, &amp;pivot</span><span class=cF7>)</span><span class=cF0> &gt; </span><span class=cFE>0</span><span class=cF0>)
<a name="l51"></a> right--;
<a name="l52"></a> </span><span class=cF1>if</span><span class=cF0> (left &lt;= right)
<a name="l53"></a> </span><span class=cF5>SwapI64</span><span class=cF0>(left++, right--);
<a name="l54"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l55"></a> </span><span class=cF1>while</span><span class=cF0> (left &lt;= right);
<a name="l56"></a>
<a name="l57"></a> i = right + </span><span class=cFE>1</span><span class=cF0> - base;
<a name="l58"></a> </span><span class=cF1>if</span><span class=cF0> (</span><span class=cFE>1</span><span class=cF0> &lt; i &lt; num)
<a name="l59"></a> </span><span class=cFD>QuickSort2a</span><span class=cF0>(base, i, fp_compare);
<a name="l60"></a> i = base + num - left;
<a name="l61"></a> </span><span class=cF1>if</span><span class=cF0> (</span><span class=cFE>1</span><span class=cF0> &lt; i &lt; num)
<a name="l62"></a> </span><span class=cFD>QuickSort2a</span><span class=cF0>(left, i, fp_compare);
<a name="l63"></a>}
<a name="l64"></a></span><span class=cF1>U0</span><span class=cF0> </span><span class=cFD>QuickSort2b</span><span class=cF0>(</span><span class=cF1>U8</span><span class=cF0> *base, </span><span class=cF9>I64</span><span class=cF0> num, </span><span class=cF9>I64</span><span class=cF0> width, </span><span class=cF9>I64</span><span class=cF0> </span><span class=cF7>(</span><span class=cF0>*fp_compare</span><span class=cF7>)(</span><span class=cF1>U8</span><span class=cF0> *e1, </span><span class=cF1>U8</span><span class=cF0> *e2</span><span class=cF7>)</span><span class=cF0>, </span><span class=cF1>U8</span><span class=cF0> *tmp)
<a name="l65"></a>{</span><span class=cF2>//Not public</span><span class=cF0>
<a name="l66"></a> </span><span class=cF9>I64</span><span class=cF0> i;
<a name="l67"></a> </span><span class=cF1>U8</span><span class=cF0> *left, *right, *pivot = tmp + width;
<a name="l68"></a>
<a name="l69"></a> left = base;
<a name="l70"></a> right = base + (num - </span><span class=cFE>1</span><span class=cF0>) * width;
<a name="l71"></a> </span><span class=cF5>MemCopy</span><span class=cF0>(pivot, base + num / </span><span class=cFE>2</span><span class=cF0> * width, width);
<a name="l72"></a> </span><span class=cF1>do</span><span class=cF0>
<a name="l73"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l74"></a> </span><span class=cF1>while</span><span class=cF0> (</span><span class=cF7>(</span><span class=cF0>*fp_compare</span><span class=cF7>)(</span><span class=cF0>left, pivot</span><span class=cF7>)</span><span class=cF0> &lt; </span><span class=cFE>0</span><span class=cF0>)
<a name="l75"></a> left += width;
<a name="l76"></a> </span><span class=cF1>while</span><span class=cF0> (</span><span class=cF7>(</span><span class=cF0>*fp_compare</span><span class=cF7>)(</span><span class=cF0>right, pivot</span><span class=cF7>)</span><span class=cF0> &gt; </span><span class=cFE>0</span><span class=cF0>)
<a name="l77"></a> right -= width;
<a name="l78"></a> </span><span class=cF1>if</span><span class=cF0> (left &lt;= right)
<a name="l79"></a> {
<a name="l80"></a> </span><span class=cF1>if</span><span class=cF0> (left != right)
<a name="l81"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l82"></a> </span><span class=cF5>MemCopy</span><span class=cF0>(tmp, right, width);
<a name="l83"></a> </span><span class=cF5>MemCopy</span><span class=cF0>(right, left, width);
<a name="l84"></a> </span><span class=cF5>MemCopy</span><span class=cF0>(left, tmp, width);
<a name="l85"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l86"></a> left += width;
<a name="l87"></a> right -= width;
<a name="l88"></a> }
<a name="l89"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l90"></a> </span><span class=cF1>while</span><span class=cF0> (left &lt;= right);
<a name="l91"></a>
<a name="l92"></a> i = </span><span class=cFE>1</span><span class=cF0> + (right - base) / width;
<a name="l93"></a> </span><span class=cF1>if</span><span class=cF0> (</span><span class=cFE>1</span><span class=cF0> &lt; i &lt; num)
<a name="l94"></a> </span><span class=cFD>QuickSort2b</span><span class=cF0>(base, i, width, fp_compare, tmp);
<a name="l95"></a> i = num + (base - left) / width;
<a name="l96"></a> </span><span class=cF1>if</span><span class=cF0> (</span><span class=cFE>1</span><span class=cF0> &lt; i &lt; num)
<a name="l97"></a> </span><span class=cFD>QuickSort2b</span><span class=cF0>(left, i, width, fp_compare, tmp);
<a name="l98"></a>}
<a name="l99"></a></span><span class=cF1>U0</span><span class=cF0> </span><span class=cF5>QuickSort</span><span class=cF0>(</span><span class=cF1>U8</span><span class=cF0> *base, </span><span class=cF9>I64</span><span class=cF0> num, </span><span class=cF9>I64</span><span class=cF0> width, </span><span class=cF9>I64</span><span class=cF0> </span><span class=cF7>(</span><span class=cF0>*fp_compare</span><span class=cF7>)(</span><span class=cF1>U8</span><span class=cF0> *e1, </span><span class=cF1>U8</span><span class=cF0> *e2</span><span class=cF7>)</span><span class=cF0>)
<a name="l100"></a>{</span><span class=cF2>/*Quick Sort: fp_compare() passes by ref.</span><span class=cF0>
<a name="l101"></a>
<a name="l102"></a></span><span class=cF2>For ascending strings: return StrCompare(*e1,*e2);</span><span class=cF0>
<a name="l103"></a></span><span class=cF2>For ascending ints</span><span class=cF0> </span><span class=cF2> : return *e1-*e2;</span><span class=cF0>
<a name="l104"></a></span><span class=cF2>Don't return e1-e2 if numbers can overflow, return -1,0 or 1.</span><span class=cF0>
<a name="l105"></a>
<a name="l106"></a></span><span class=cF2>Maybe, look at </span><a href="https://zeal-operating-system.github.io/ZealOS/Demo/MultiCore/MPRadix.CC.html#l1"><span class=cF4>::/Demo/MultiCore/MPRadix.CC</span></a><span class=cF2>.</span><span class=cF0>
<a name="l107"></a></span><span class=cF2>*/</span><span class=cF0>
<a name="l108"></a> </span><span class=cF1>U8</span><span class=cF0> *tmp;
<a name="l109"></a>
<a name="l110"></a> </span><span class=cF1>if</span><span class=cF0> (width &amp;&amp; num &gt; </span><span class=cFE>1</span><span class=cF0>)
<a name="l111"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l112"></a> </span><span class=cF1>if</span><span class=cF0> (width == </span><span class=cF1>sizeof</span><span class=cF7>(</span><span class=cF1>U8</span><span class=cF0> *</span><span class=cF7>)</span><span class=cF0>) </span><span class=cF2>//assign instead of MemCopy for width 8</span><span class=cF0>
<a name="l113"></a> </span><span class=cFD>QuickSort2a</span><span class=cF0>(base, num, fp_compare);
<a name="l114"></a> </span><span class=cF1>else</span><span class=cF0>
<a name="l115"></a> {
<a name="l116"></a> tmp = </span><span class=cF5>MAlloc</span><span class=cF0>(width * </span><span class=cFE>2</span><span class=cF0>);
<a name="l117"></a> </span><span class=cFD>QuickSort2b</span><span class=cF0>(base, num, width, fp_compare, tmp);
<a name="l118"></a> </span><span class=cF5>Free</span><span class=cF0>(tmp);
<a name="l119"></a> }
<a name="l120"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l121"></a>}
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