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TomAwezome 6b3fd2fecb Rename abs_addres to abs_address. 
Update documentation/comments to rename addr, fun, var, stmt, blk, desc, reg, seg, ptr, dup, clus, val, and bttn, to address, function, variable, statement, block, description, register, segment, pointer, duplicate, cluster, value, and button, respectively.
2021-10-06 21:35:32 -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) blocks 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) blocks 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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