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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=cF9>I64</span><span class=cF0> </span><span class=cF5>FSize</span><span class=cF0>(</span><span class=cF9>CFile</span><span class=cF0> *f)
<a name="l2"></a>{</span><span class=cF2>//Report size of opened file in bytes.</span><span class=cF0>
<a name="l3"></a> </span><span class=cF1>if</span><span class=cF0> (f)
<a name="l4"></a> </span><span class=cF1>return</span><span class=cF0> f-&gt;de.size;
<a name="l5"></a> </span><span class=cF1>else</span><span class=cF0>
<a name="l6"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cFE>0</span><span class=cF0>;
<a name="l7"></a>}
<a name="l8"></a>
<a name="l9"></a></span><span class=cF9>CFile</span><span class=cF0> *</span><span class=cF5>FOpen</span><span class=cF0>(</span><span class=cF1>U8</span><span class=cF0> *filename, </span><span class=cF1>U8</span><span class=cF0> *flags, </span><span class=cF9>I64</span><span class=cF0> count=</span><span class=cFE>0</span><span class=cF0>)
<a name="l10"></a>{</span><span class=cF2>//Allows flags &quot;r&quot;,&quot;w&quot;,&quot;w+&quot;. &quot;c&quot; for contiguous.</span><span class=cF0>
<a name="l11"></a></span><span class=cF2>//(It uses </span><a href="https://zeal-operating-system.github.io/ZealOS/Kernel/StrA.CC.html#l457"><span class=cF4>StrOcc</span></a><span class=cF2>() for 'w', 'r', '+', 'c')</span><span class=cF0>
<a name="l12"></a> </span><span class=cF9>CFile</span><span class=cF0> *f = </span><span class=cF5>CAlloc</span><span class=cF0>(</span><span class=cF1>sizeof</span><span class=cF7>(</span><span class=cF9>CFile</span><span class=cF7>)</span><span class=cF0>);
<a name="l13"></a> </span><span class=cF9>CDirContext</span><span class=cF0> *dirc;
<a name="l14"></a> </span><span class=cF1>U8</span><span class=cF0> *full_name;
<a name="l15"></a> </span><span class=cF1>Bool</span><span class=cF0> contiguous = </span><span class=cF5>StrOcc</span><span class=cF0>(flags, </span><span class=cF6>'c'</span><span class=cF0>);
<a name="l16"></a>
<a name="l17"></a> f-&gt;clus = </span><span class=cF3>INVALID_CLUS</span><span class=cF0>;
<a name="l18"></a> f-&gt;fblk_num = </span><span class=cFE>0</span><span class=cF0>;
<a name="l19"></a> </span><span class=cF1>if</span><span class=cF0> (count &gt; </span><span class=cFE>0</span><span class=cF0>)
<a name="l20"></a> f-&gt;max_blk = count - </span><span class=cFE>1</span><span class=cF0>;
<a name="l21"></a> </span><span class=cF1>else</span><span class=cF0>
<a name="l22"></a> f-&gt;max_blk = </span><span class=cF3>I64_MAX</span><span class=cF0>;
<a name="l23"></a> f-&gt;file_clus_num = </span><span class=cF3>INVALID_CLUS</span><span class=cF0>;
<a name="l24"></a> full_name = </span><span class=cF5>FileNameAbs</span><span class=cF0>(filename);
<a name="l25"></a> f-&gt;drive = </span><span class=cF5>Letter2Drive</span><span class=cF0>(*full_name);
<a name="l26"></a> </span><span class=cF1>if</span><span class=cF0> (f-&gt;drive-&gt;fs_type == </span><span class=cF3>FSt_REDSEA</span><span class=cF0>)
<a name="l27"></a> contiguous = </span><span class=cF3>TRUE</span><span class=cF0>;
<a name="l28"></a> </span><span class=cF1>if</span><span class=cF0> (contiguous)
<a name="l29"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l30"></a> f-&gt;flags |= </span><span class=cF3>FF_CONTIGUOUS</span><span class=cF0>;
<a name="l31"></a> </span><span class=cF1>if</span><span class=cF0> (f-&gt;drive-&gt;fs_type != </span><span class=cF3>FSt_REDSEA</span><span class=cF0> &amp;&amp; !</span><span class=cF7>(</span><span class=cF5>FileAttr</span><span class=cF0>(filename) &amp; </span><span class=cF3>RS_ATTR_CONTIGUOUS</span><span class=cF7>)</span><span class=cF0>)
<a name="l32"></a> </span><span class=cF5>throw</span><span class=cF0>(</span><span class=cF6>'File'</span><span class=cF0>);
<a name="l33"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l34"></a> f-&gt;clus_buf = </span><span class=cF5>CAlloc</span><span class=cF0>(f-&gt;drive-&gt;spc &lt;&lt; </span><span class=cF3>BLK_SIZE_BITS</span><span class=cF0>);
<a name="l35"></a> </span><span class=cF1>if</span><span class=cF0> (</span><span class=cF5>StrOcc</span><span class=cF7>(</span><span class=cF0>flags, </span><span class=cF6>'w'</span><span class=cF7>)</span><span class=cF0>)
<a name="l36"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l37"></a> f-&gt;flags = f-&gt;flags | </span><span class=cF3>FF_WRITE</span><span class=cF0> | </span><span class=cF3>FF_NEEDS_WRITE</span><span class=cF0>;
<a name="l38"></a> </span><span class=cF1>if</span><span class=cF0> (</span><span class=cF5>StrOcc</span><span class=cF7>(</span><span class=cF0>flags, </span><span class=cF6>'+'</span><span class=cF7>)</span><span class=cF0>)
<a name="l39"></a> {
<a name="l40"></a> </span><span class=cF1>if</span><span class=cF0> (</span><span class=cF5>FileFind</span><span class=cF7>(</span><span class=cF0>full_name, &amp;f-&gt;de, </span><span class=cF3>FUF_JUST_FILES</span><span class=cF7>)</span><span class=cF0>)
<a name="l41"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l42"></a> </span><span class=cF5>Free</span><span class=cF0>(full_name);
<a name="l43"></a> </span><span class=cF1>if</span><span class=cF0> (contiguous)
<a name="l44"></a> f-&gt;max_blk = (</span><span class=cF5>FSize</span><span class=cF7>(</span><span class=cF0>f</span><span class=cF7>)</span><span class=cF0> + </span><span class=cF3>BLK_SIZE</span><span class=cF0> - </span><span class=cFE>1</span><span class=cF0>) &gt;&gt; </span><span class=cF3>BLK_SIZE_BITS</span><span class=cF0> - </span><span class=cFE>1</span><span class=cF0>;
<a name="l45"></a> </span><span class=cF1>return</span><span class=cF0> f;
<a name="l46"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l47"></a> }
<a name="l48"></a> </span><span class=cF1>else</span><span class=cF0>
<a name="l49"></a> </span><span class=cF5>Del</span><span class=cF0>(full_name,,, </span><span class=cF3>FALSE</span><span class=cF0>);
<a name="l50"></a> f-&gt;de.full_name = full_name;
<a name="l51"></a> f-&gt;flags |= </span><span class=cF3>FF_NEW_FILE</span><span class=cF0>;
<a name="l52"></a> </span><span class=cF1>if</span><span class=cF0> (dirc = </span><span class=cF5>DirContextNew</span><span class=cF7>(</span><span class=cF0>full_name</span><span class=cF7>)</span><span class=cF0>)
<a name="l53"></a> {
<a name="l54"></a> </span><span class=cF5>StrCopy</span><span class=cF0>(f-&gt;de.name, dirc-&gt;mask);
<a name="l55"></a> </span><span class=cF1>if</span><span class=cF0> (count &gt; </span><span class=cFE>0</span><span class=cF0>)
<a name="l56"></a> </span><span class=cF7>{</span><span class=cF2>//We pre-alloc the whole thing.</span><span class=cF0>
<a name="l57"></a> f-&gt;de.clus = </span><span class=cF5>ClusAlloc</span><span class=cF0>(f-&gt;drive,</span><span class=cFE>0</span><span class=cF0>, </span><span class=cF7>(</span><span class=cF0>count + f-&gt;drive-&gt;spc - </span><span class=cFE>1</span><span class=cF7>)</span><span class=cF0> / f-&gt;drive-&gt;spc, contiguous);
<a name="l58"></a> f-&gt;de.size = count &lt;&lt; </span><span class=cF3>BLK_SIZE_BITS</span><span class=cF0>;
<a name="l59"></a> </span><span class=cF5>DirNew</span><span class=cF0>(dirc-&gt;drive, </span><span class=cF5>Fs</span><span class=cF0>-&gt;cur_dir, &amp;f-&gt;de, </span><span class=cF3>TRUE</span><span class=cF0>);
<a name="l60"></a> f-&gt;flags &amp;= ~</span><span class=cF3>FF_NEW_FILE</span><span class=cF0>;
<a name="l61"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l62"></a> </span><span class=cF5>DirContextDel</span><span class=cF0>(dirc);
<a name="l63"></a> </span><span class=cF1>return</span><span class=cF0> f;
<a name="l64"></a> }
<a name="l65"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l66"></a> </span><span class=cF1>else</span><span class=cF0>
<a name="l67"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l68"></a> </span><span class=cF1>if</span><span class=cF0> (</span><span class=cF5>FileFind</span><span class=cF7>(</span><span class=cF0>full_name, &amp;f-&gt;de, </span><span class=cF3>FUF_JUST_FILES</span><span class=cF7>)</span><span class=cF0>)
<a name="l69"></a> {
<a name="l70"></a> </span><span class=cF5>Free</span><span class=cF0>(full_name);
<a name="l71"></a> f-&gt;max_blk = (</span><span class=cF5>FSize</span><span class=cF7>(</span><span class=cF0>f</span><span class=cF7>)</span><span class=cF0> + </span><span class=cF3>BLK_SIZE</span><span class=cF0> - </span><span class=cFE>1</span><span class=cF0>) &gt;&gt; </span><span class=cF3>BLK_SIZE_BITS</span><span class=cF0> - </span><span class=cFE>1</span><span class=cF0>;
<a name="l72"></a> </span><span class=cF1>return</span><span class=cF0> f;
<a name="l73"></a> }
<a name="l74"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l75"></a> </span><span class=cF5>Free</span><span class=cF0>(f-&gt;clus_buf);
<a name="l76"></a> </span><span class=cF5>Free</span><span class=cF0>(full_name);
<a name="l77"></a> </span><span class=cF5>Free</span><span class=cF0>(f);
<a name="l78"></a>
<a name="l79"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cF3>NULL</span><span class=cF0>;
<a name="l80"></a>}
<a name="l81"></a>
<a name="l82"></a></span><span class=cF1>U0</span><span class=cF0> </span><span class=cF5>FClose</span><span class=cF0>(</span><span class=cF9>CFile</span><span class=cF0> *f)
<a name="l83"></a>{</span><span class=cF2>//Close CFile, updating directory.</span><span class=cF0>
<a name="l84"></a> </span><span class=cF9>CDirContext</span><span class=cF0> *dirc;
<a name="l85"></a>
<a name="l86"></a> </span><span class=cF1>if</span><span class=cF0> (f)
<a name="l87"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l88"></a> </span><span class=cF1>if</span><span class=cF0> (f-&gt;flags &amp; </span><span class=cF3>FF_BUF_DIRTY</span><span class=cF0>)
<a name="l89"></a> {
<a name="l90"></a> </span><span class=cF5>ClusWrite</span><span class=cF0>(f-&gt;drive, f-&gt;clus_buf, f-&gt;clus, </span><span class=cFE>1</span><span class=cF0>);
<a name="l91"></a> f-&gt;flags &amp;= ~</span><span class=cF3>FF_BUF_DIRTY</span><span class=cF0>;
<a name="l92"></a> }
<a name="l93"></a> </span><span class=cF1>if</span><span class=cF0> (f-&gt;flags &amp; </span><span class=cF3>FF_NEEDS_WRITE</span><span class=cF0>)
<a name="l94"></a> {
<a name="l95"></a> </span><span class=cF1>if</span><span class=cF0> (dirc = </span><span class=cF5>DirContextNew</span><span class=cF7>(</span><span class=cF0>f-&gt;de.full_name</span><span class=cF7>)</span><span class=cF0>)
<a name="l96"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l97"></a> </span><span class=cF1>if</span><span class=cF0> (!</span><span class=cF7>(</span><span class=cF0>f-&gt;flags &amp; </span><span class=cF3>FF_USE_OLD_DATETIME</span><span class=cF7>)</span><span class=cF0>)
<a name="l98"></a> f-&gt;de.datetime = </span><span class=cF5>Now</span><span class=cF0>;
<a name="l99"></a> </span><span class=cF1>if</span><span class=cF0> (f-&gt;flags &amp; </span><span class=cF3>FF_NEW_FILE</span><span class=cF0>)
<a name="l100"></a> </span><span class=cF5>DirNew</span><span class=cF0>(dirc-&gt;drive, </span><span class=cF5>Fs</span><span class=cF0>-&gt;cur_dir, &amp;f-&gt;de, </span><span class=cF3>TRUE</span><span class=cF0>);
<a name="l101"></a> </span><span class=cF1>else</span><span class=cF0>
<a name="l102"></a> </span><span class=cF5>DirNew</span><span class=cF0>(dirc-&gt;drive, </span><span class=cF5>Fs</span><span class=cF0>-&gt;cur_dir, &amp;f-&gt;de, </span><span class=cF3>FALSE</span><span class=cF0>);
<a name="l103"></a> </span><span class=cF5>DirContextDel</span><span class=cF0>(dirc);
<a name="l104"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l105"></a> </span><span class=cF1>else</span><span class=cF0>
<a name="l106"></a> </span><span class=cF5>throw</span><span class=cF0>(</span><span class=cF6>'File'</span><span class=cF0>);
<a name="l107"></a> }
<a name="l108"></a> </span><span class=cF5>Free</span><span class=cF0>(f-&gt;clus_buf);
<a name="l109"></a> </span><span class=cF5>Free</span><span class=cF0>(f-&gt;de.full_name);
<a name="l110"></a> </span><span class=cF5>Free</span><span class=cF0>(f);
<a name="l111"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l112"></a>}
<a name="l113"></a>
<a name="l114"></a></span><span class=cF9>I64</span><span class=cF0> </span><span class=cFD>FSetClus</span><span class=cF0>(</span><span class=cF9>CFile</span><span class=cF0> *f, </span><span class=cF9>I64</span><span class=cF0> c, </span><span class=cF9>I64</span><span class=cF0> blk, </span><span class=cF1>Bool</span><span class=cF0> read)
<a name="l115"></a>{
<a name="l116"></a> </span><span class=cF9>CDrive</span><span class=cF0> *drive = f-&gt;drive;
<a name="l117"></a> </span><span class=cF9>I64</span><span class=cF0> i;
<a name="l118"></a>
<a name="l119"></a> </span><span class=cF1>if</span><span class=cF0> (f-&gt;clus != c)
<a name="l120"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l121"></a> </span><span class=cF1>if</span><span class=cF0> (f-&gt;flags &amp; </span><span class=cF3>FF_BUF_DIRTY</span><span class=cF0>)
<a name="l122"></a> {
<a name="l123"></a> i = drive-&gt;spc;
<a name="l124"></a> </span><span class=cF1>if</span><span class=cF0> (f-&gt;max_blk != </span><span class=cF3>I64_MAX</span><span class=cF0>)
<a name="l125"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l126"></a> i = f-&gt;max_blk + </span><span class=cFE>1</span><span class=cF0> - f-&gt;file_clus_num * drive-&gt;spc;
<a name="l127"></a> </span><span class=cF1>if</span><span class=cF0> (i &gt; drive-&gt;spc)
<a name="l128"></a> i = drive-&gt;spc;
<a name="l129"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l130"></a> </span><span class=cF5>ClusBlkWrite</span><span class=cF0>(drive, f-&gt;clus_buf, f-&gt;clus, i);
<a name="l131"></a> f-&gt;flags = f-&gt;flags &amp; ~</span><span class=cF3>FF_BUF_DIRTY</span><span class=cF0>;
<a name="l132"></a> }
<a name="l133"></a> f-&gt;clus = c;
<a name="l134"></a> f-&gt;file_clus_num = blk / drive-&gt;spc;
<a name="l135"></a> </span><span class=cF1>if</span><span class=cF0> (read)
<a name="l136"></a> {
<a name="l137"></a> i = drive-&gt;spc;
<a name="l138"></a> </span><span class=cF1>if</span><span class=cF0> (f-&gt;max_blk != </span><span class=cF3>I64_MAX</span><span class=cF0>)
<a name="l139"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l140"></a> i = f-&gt;max_blk + </span><span class=cFE>1</span><span class=cF0> - f-&gt;file_clus_num * drive-&gt;spc;
<a name="l141"></a> </span><span class=cF1>if</span><span class=cF0> (i &gt; drive-&gt;spc)
<a name="l142"></a> i = drive-&gt;spc;
<a name="l143"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l144"></a> c = </span><span class=cF5>ClusBlkRead</span><span class=cF0>(drive, f-&gt;clus_buf, c, i);
<a name="l145"></a> }
<a name="l146"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l147"></a>
<a name="l148"></a> </span><span class=cF1>return</span><span class=cF0> c;
<a name="l149"></a>}
<a name="l150"></a>
<a name="l151"></a></span><span class=cF1>Bool</span><span class=cF0> </span><span class=cF5>FBlkRead</span><span class=cF0>(</span><span class=cF9>CFile</span><span class=cF0> *f, </span><span class=cF1>U8</span><span class=cF0> *buf, </span><span class=cF9>I64</span><span class=cF0> blk=</span><span class=cF3>FFB_NEXT_BLK</span><span class=cF0>, </span><span class=cF9>I64</span><span class=cF0> count=</span><span class=cFE>1</span><span class=cF0>)
<a name="l152"></a>{</span><span class=cF2>//Read [nth,n+count) blks of file.</span><span class=cF0>
<a name="l153"></a> </span><span class=cF9>CDrive</span><span class=cF0> *drive = f-&gt;drive;
<a name="l154"></a> </span><span class=cF9>I64</span><span class=cF0> spc = drive-&gt;spc, i, j, c = f-&gt;de.clus;
<a name="l155"></a>
<a name="l156"></a> </span><span class=cF1>if</span><span class=cF0> (!f || !drive)
<a name="l157"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cF3>FALSE</span><span class=cF0>;
<a name="l158"></a> </span><span class=cF1>if</span><span class=cF0> (blk == </span><span class=cF3>FFB_NEXT_BLK</span><span class=cF0>)
<a name="l159"></a> blk = f-&gt;fblk_num;
<a name="l160"></a> </span><span class=cF1>if</span><span class=cF0> (blk + count - </span><span class=cFE>1</span><span class=cF0> &gt; f-&gt;max_blk)
<a name="l161"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cF3>FALSE</span><span class=cF0>;
<a name="l162"></a> </span><span class=cF1>if</span><span class=cF0> (count &lt;= </span><span class=cFE>0</span><span class=cF0>)
<a name="l163"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cF3>TRUE</span><span class=cF0>;
<a name="l164"></a>
<a name="l165"></a> </span><span class=cF1>if</span><span class=cF0> (f-&gt;flags &amp; </span><span class=cF3>FF_CONTIGUOUS</span><span class=cF0>)
<a name="l166"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l167"></a> </span><span class=cF5>BlkRead</span><span class=cF0>(drive, buf, </span><span class=cF5>Clus2Blk</span><span class=cF7>(</span><span class=cF0>drive, c</span><span class=cF7>)</span><span class=cF0> + blk, count);
<a name="l168"></a> blk += count;
<a name="l169"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l170"></a> </span><span class=cF1>else</span><span class=cF0>
<a name="l171"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l172"></a> i = blk / spc;
<a name="l173"></a> </span><span class=cF1>if</span><span class=cF0> (</span><span class=cFE>0</span><span class=cF0> &lt;= f-&gt;file_clus_num &lt;= i)
<a name="l174"></a> {
<a name="l175"></a> c = f-&gt;clus;
<a name="l176"></a> i -= f-&gt;file_clus_num;
<a name="l177"></a> }
<a name="l178"></a> </span><span class=cF1>if</span><span class=cF0> (i &gt; </span><span class=cFE>0</span><span class=cF0>)
<a name="l179"></a> c = </span><span class=cF5>ClusNumNext</span><span class=cF0>(drive, c, i);
<a name="l180"></a>
<a name="l181"></a> </span><span class=cF1>if</span><span class=cF0> (i = blk % spc)
<a name="l182"></a> {
<a name="l183"></a> c = </span><span class=cFD>FSetClus</span><span class=cF0>(f, c, blk, </span><span class=cF3>TRUE</span><span class=cF0>);
<a name="l184"></a> </span><span class=cF1>if</span><span class=cF0> (count &lt; spc - i)
<a name="l185"></a> j = count;
<a name="l186"></a> </span><span class=cF1>else</span><span class=cF0>
<a name="l187"></a> j = spc - i;
<a name="l188"></a> </span><span class=cF5>MemCopy</span><span class=cF0>(buf, f-&gt;clus_buf + i &lt;&lt; </span><span class=cF3>BLK_SIZE_BITS</span><span class=cF0>, j &lt;&lt; </span><span class=cF3>BLK_SIZE_BITS</span><span class=cF0>);
<a name="l189"></a> buf += j &lt;&lt; </span><span class=cF3>BLK_SIZE_BITS</span><span class=cF0>;
<a name="l190"></a> count -= j;
<a name="l191"></a> blk += j;
<a name="l192"></a> }
<a name="l193"></a> </span><span class=cF1>while</span><span class=cF0> (count &gt;= spc)
<a name="l194"></a> {
<a name="l195"></a> c = </span><span class=cFD>FSetClus</span><span class=cF0>(f, c, blk, </span><span class=cF3>TRUE</span><span class=cF0>);
<a name="l196"></a> </span><span class=cF5>MemCopy</span><span class=cF0>(buf, f-&gt;clus_buf, spc &lt;&lt; </span><span class=cF3>BLK_SIZE_BITS</span><span class=cF0>);
<a name="l197"></a> buf += spc &lt;&lt; </span><span class=cF3>BLK_SIZE_BITS</span><span class=cF0>;
<a name="l198"></a> count -= spc;
<a name="l199"></a> blk += spc;
<a name="l200"></a> }
<a name="l201"></a> </span><span class=cF1>if</span><span class=cF0> (count &gt; </span><span class=cFE>0</span><span class=cF0>)
<a name="l202"></a> {
<a name="l203"></a> c = </span><span class=cFD>FSetClus</span><span class=cF0>(f, c, blk, </span><span class=cF3>TRUE</span><span class=cF0>);
<a name="l204"></a> </span><span class=cF5>MemCopy</span><span class=cF0>(buf, f-&gt;clus_buf, count &lt;&lt; </span><span class=cF3>BLK_SIZE_BITS</span><span class=cF0>);
<a name="l205"></a> buf += count&lt;&lt;</span><span class=cF3>BLK_SIZE_BITS</span><span class=cF0>;
<a name="l206"></a> blk += count;
<a name="l207"></a> }
<a name="l208"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l209"></a> f-&gt;fblk_num = blk;
<a name="l210"></a>
<a name="l211"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cF3>TRUE</span><span class=cF0>;
<a name="l212"></a>}
<a name="l213"></a>
<a name="l214"></a></span><span class=cF1>Bool</span><span class=cF0> </span><span class=cF5>FBlkWrite</span><span class=cF0>(</span><span class=cF9>CFile</span><span class=cF0> *f, </span><span class=cF1>U8</span><span class=cF0> *buf, </span><span class=cF9>I64</span><span class=cF0> blk=</span><span class=cF3>FFB_NEXT_BLK</span><span class=cF0>, </span><span class=cF9>I64</span><span class=cF0> count=</span><span class=cFE>1</span><span class=cF0>)
<a name="l215"></a>{</span><span class=cF2>//Write [nth,n+count) blks of file.</span><span class=cF0>
<a name="l216"></a> </span><span class=cF9>CDrive</span><span class=cF0> *drive = f-&gt;drive;
<a name="l217"></a> </span><span class=cF9>I64</span><span class=cF0> spc = drive-&gt;spc, i, j, c = f-&gt;de.clus, c1;
<a name="l218"></a>
<a name="l219"></a> </span><span class=cF1>if</span><span class=cF0> (!f || !drive)
<a name="l220"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cF3>FALSE</span><span class=cF0>;
<a name="l221"></a> </span><span class=cF1>if</span><span class=cF0> (blk == </span><span class=cF3>FFB_NEXT_BLK</span><span class=cF0>)
<a name="l222"></a> blk = f-&gt;fblk_num;
<a name="l223"></a> </span><span class=cF1>if</span><span class=cF0> (blk + count - </span><span class=cFE>1</span><span class=cF0> &gt; f-&gt;max_blk)
<a name="l224"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cF3>FALSE</span><span class=cF0>;
<a name="l225"></a> </span><span class=cF1>if</span><span class=cF0> (!</span><span class=cF7>(</span><span class=cF0>f-&gt;flags &amp; </span><span class=cF3>FF_WRITE</span><span class=cF7>)</span><span class=cF0>)
<a name="l226"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cF3>FALSE</span><span class=cF0>;
<a name="l227"></a> </span><span class=cF1>if</span><span class=cF0> (count &lt;= </span><span class=cFE>0</span><span class=cF0>)
<a name="l228"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cF3>TRUE</span><span class=cF0>;
<a name="l229"></a> </span><span class=cF1>if</span><span class=cF0> (f-&gt;flags &amp; </span><span class=cF3>FF_CONTIGUOUS</span><span class=cF0>)
<a name="l230"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l231"></a> </span><span class=cF5>BlkWrite</span><span class=cF0>(drive, buf, </span><span class=cF5>Clus2Blk</span><span class=cF7>(</span><span class=cF0>drive, c</span><span class=cF7>)</span><span class=cF0> + blk, count);
<a name="l232"></a> blk += count;
<a name="l233"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l234"></a> </span><span class=cF1>else</span><span class=cF0>
<a name="l235"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l236"></a> </span><span class=cF1>if</span><span class=cF0> (!c)
<a name="l237"></a> {
<a name="l238"></a> c = </span><span class=cF5>ClusAlloc</span><span class=cF0>(drive, </span><span class=cFE>0</span><span class=cF0>, </span><span class=cFE>1</span><span class=cF0>, </span><span class=cF3>FALSE</span><span class=cF0>);
<a name="l239"></a> f-&gt;file_clus_num = </span><span class=cFE>0</span><span class=cF0>;
<a name="l240"></a> f-&gt;clus = c;
<a name="l241"></a> f-&gt;de.clus = c;
<a name="l242"></a> f-&gt;flags |= </span><span class=cF3>FF_NEEDS_WRITE</span><span class=cF0> | </span><span class=cF3>FF_NEW_FILE</span><span class=cF0>;
<a name="l243"></a> }
<a name="l244"></a> i = blk / spc;
<a name="l245"></a> </span><span class=cF1>if</span><span class=cF0> (</span><span class=cFE>0</span><span class=cF0> &lt;= f-&gt;file_clus_num &lt;= i)
<a name="l246"></a> {
<a name="l247"></a> c = f-&gt;clus;
<a name="l248"></a> i -= f-&gt;file_clus_num;
<a name="l249"></a> }
<a name="l250"></a> </span><span class=cF1>while</span><span class=cF0> (i &gt; </span><span class=cFE>0</span><span class=cF0>)
<a name="l251"></a> {
<a name="l252"></a> c1 = c;
<a name="l253"></a> c = </span><span class=cF5>ClusNumNext</span><span class=cF0>(drive, c1, </span><span class=cFE>1</span><span class=cF0>);
<a name="l254"></a> </span><span class=cF1>if</span><span class=cF0> (c == </span><span class=cF3>INVALID_CLUS</span><span class=cF0>)
<a name="l255"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l256"></a> c = </span><span class=cF5>ClusAlloc</span><span class=cF0>(drive, c1, i, </span><span class=cF3>FALSE</span><span class=cF0>);
<a name="l257"></a> </span><span class=cF1>if</span><span class=cF0> (i &gt; </span><span class=cFE>1</span><span class=cF0>)
<a name="l258"></a> c = </span><span class=cF5>ClusNumNext</span><span class=cF0>(drive, c, i - </span><span class=cFE>1</span><span class=cF0>);
<a name="l259"></a> </span><span class=cF1>break</span><span class=cF0>;
<a name="l260"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l261"></a> </span><span class=cF1>else</span><span class=cF0>
<a name="l262"></a> i--;
<a name="l263"></a> }
<a name="l264"></a>
<a name="l265"></a> </span><span class=cF1>if</span><span class=cF0> (i = blk % spc)
<a name="l266"></a> {
<a name="l267"></a> </span><span class=cFD>FSetClus</span><span class=cF0>(f, c, blk, </span><span class=cF3>TRUE</span><span class=cF0>);
<a name="l268"></a> </span><span class=cF1>if</span><span class=cF0> (count &lt; spc - i)
<a name="l269"></a> j = count;
<a name="l270"></a> </span><span class=cF1>else</span><span class=cF0>
<a name="l271"></a> j = spc - i;
<a name="l272"></a> </span><span class=cF5>MemCopy</span><span class=cF0>(f-&gt;clus_buf + </span><span class=cF3>BLK_SIZE</span><span class=cF0> * i, buf, j &lt;&lt; </span><span class=cF3>BLK_SIZE_BITS</span><span class=cF0>);
<a name="l273"></a> f-&gt;flags |= </span><span class=cF3>FF_BUF_DIRTY</span><span class=cF0>;
<a name="l274"></a> buf += j &lt;&lt; </span><span class=cF3>BLK_SIZE_BITS</span><span class=cF0>;
<a name="l275"></a> count -= j;
<a name="l276"></a> blk += j;
<a name="l277"></a> </span><span class=cF1>if</span><span class=cF0> (count &gt; </span><span class=cFE>0</span><span class=cF0>)
<a name="l278"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l279"></a> c1 = c;
<a name="l280"></a> c = </span><span class=cF5>ClusNumNext</span><span class=cF0>(drive, c1, </span><span class=cFE>1</span><span class=cF0>);
<a name="l281"></a> </span><span class=cF1>if</span><span class=cF0> (c == </span><span class=cF3>INVALID_CLUS</span><span class=cF0>)
<a name="l282"></a> c = </span><span class=cF5>ClusAlloc</span><span class=cF0>(drive, c1, </span><span class=cFE>1</span><span class=cF0>, </span><span class=cF3>FALSE</span><span class=cF0>);
<a name="l283"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l284"></a> }
<a name="l285"></a> </span><span class=cF1>while</span><span class=cF0> (count &gt;= spc)
<a name="l286"></a> {
<a name="l287"></a> </span><span class=cFD>FSetClus</span><span class=cF0>(f, c, blk, </span><span class=cF3>FALSE</span><span class=cF0>);
<a name="l288"></a> </span><span class=cF5>MemCopy</span><span class=cF0>(f-&gt;clus_buf, buf, spc &lt;&lt; </span><span class=cF3>BLK_SIZE_BITS</span><span class=cF0>);
<a name="l289"></a> f-&gt;flags |= </span><span class=cF3>FF_BUF_DIRTY</span><span class=cF0>;
<a name="l290"></a> buf += spc &lt;&lt; </span><span class=cF3>BLK_SIZE_BITS</span><span class=cF0>;
<a name="l291"></a> count -= spc;
<a name="l292"></a> blk += spc;
<a name="l293"></a> </span><span class=cF1>if</span><span class=cF0> (count &gt; </span><span class=cFE>0</span><span class=cF0>)
<a name="l294"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l295"></a> c1 = c;
<a name="l296"></a> c = </span><span class=cF5>ClusNumNext</span><span class=cF0>(drive, c1, </span><span class=cFE>1</span><span class=cF0>);
<a name="l297"></a> </span><span class=cF1>if</span><span class=cF0> (c == </span><span class=cF3>INVALID_CLUS</span><span class=cF0>)
<a name="l298"></a> c = </span><span class=cF5>ClusAlloc</span><span class=cF0>(drive, c1, </span><span class=cFE>1</span><span class=cF0>, </span><span class=cF3>FALSE</span><span class=cF0>);
<a name="l299"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l300"></a> }
<a name="l301"></a> </span><span class=cF1>if</span><span class=cF0> (count &gt; </span><span class=cFE>0</span><span class=cF0>)
<a name="l302"></a> {
<a name="l303"></a> </span><span class=cFD>FSetClus</span><span class=cF0>(f, c, blk, </span><span class=cF3>TRUE</span><span class=cF0>);
<a name="l304"></a> </span><span class=cF5>MemCopy</span><span class=cF0>(f-&gt;clus_buf, buf, count &lt;&lt; </span><span class=cF3>BLK_SIZE_BITS</span><span class=cF0>);
<a name="l305"></a> f-&gt;flags |= </span><span class=cF3>FF_BUF_DIRTY</span><span class=cF0>;
<a name="l306"></a> buf += count &lt;&lt; </span><span class=cF3>BLK_SIZE_BITS</span><span class=cF0>;
<a name="l307"></a> blk += count;
<a name="l308"></a> }
<a name="l309"></a> </span><span class=cF1>if</span><span class=cF0> (f-&gt;de.size &lt; blk &lt;&lt; </span><span class=cF3>BLK_SIZE_BITS</span><span class=cF0>)
<a name="l310"></a> f-&gt;de.size = blk &lt;&lt; </span><span class=cF3>BLK_SIZE_BITS</span><span class=cF0>;
<a name="l311"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l312"></a> f-&gt;fblk_num = blk;
<a name="l313"></a>
<a name="l314"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cF3>TRUE</span><span class=cF0>;
<a name="l315"></a>}
</span></pre></body>
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