mirror of
https://github.com/Zeal-Operating-System/ZealOS.git
synced 2024-12-30 17:26:31 +00:00
1b75d91002
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.
344 lines
33 KiB
HTML
Executable file
344 lines
33 KiB
HTML
Executable file
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<pre style="font-family:monospace;font-size:12pt">
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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)
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<a name="l2"></a>{</span><span class=cF2>//Report size of opened file in bytes.</span><span class=cF0>
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<a name="l3"></a> </span><span class=cF1>if</span><span class=cF0> (f)
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<a name="l4"></a> </span><span class=cF1>return</span><span class=cF0> f->de.size;
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<a name="l5"></a> </span><span class=cF1>else</span><span class=cF0>
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<a name="l6"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cFE>0</span><span class=cF0>;
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<a name="l7"></a>}
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<a name="l8"></a>
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<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>)
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<a name="l10"></a>{</span><span class=cF2>//Allows flags "r","w","w+". "c" for contiguous.</span><span class=cF0>
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<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>
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<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>);
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<a name="l13"></a> </span><span class=cF9>CDirContext</span><span class=cF0> *dirc;
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<a name="l14"></a> </span><span class=cF1>U8</span><span class=cF0> *full_name;
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<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>);
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<a name="l16"></a>
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<a name="l17"></a> f->clus = </span><span class=cF3>INVALID_CLUS</span><span class=cF0>;
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<a name="l18"></a> f->fblk_num = </span><span class=cFE>0</span><span class=cF0>;
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<a name="l19"></a> </span><span class=cF1>if</span><span class=cF0> (count > </span><span class=cFE>0</span><span class=cF0>)
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<a name="l20"></a> f->max_blk = count - </span><span class=cFE>1</span><span class=cF0>;
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<a name="l21"></a> </span><span class=cF1>else</span><span class=cF0>
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<a name="l22"></a> f->max_blk = </span><span class=cF3>I64_MAX</span><span class=cF0>;
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<a name="l23"></a> f->file_clus_num = </span><span class=cF3>INVALID_CLUS</span><span class=cF0>;
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<a name="l24"></a> full_name = </span><span class=cF5>FileNameAbs</span><span class=cF0>(filename);
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<a name="l25"></a> f->drive = </span><span class=cF5>Letter2Drive</span><span class=cF0>(*full_name);
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<a name="l26"></a> </span><span class=cF1>if</span><span class=cF0> (f->drive->fs_type == </span><span class=cF3>FSt_REDSEA</span><span class=cF0>)
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<a name="l27"></a> contiguous = </span><span class=cF3>TRUE</span><span class=cF0>;
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<a name="l28"></a> </span><span class=cF1>if</span><span class=cF0> (contiguous)
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<a name="l29"></a> </span><span class=cF7>{</span><span class=cF0>
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<a name="l30"></a> f->flags |= </span><span class=cF3>FF_CONTIGUOUS</span><span class=cF0>;
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<a name="l31"></a> </span><span class=cF1>if</span><span class=cF0> (f->drive->fs_type != </span><span class=cF3>FSt_REDSEA</span><span class=cF0> && !</span><span class=cF7>(</span><span class=cF5>FileAttr</span><span class=cF0>(filename) & </span><span class=cF3>RS_ATTR_CONTIGUOUS</span><span class=cF7>)</span><span class=cF0>)
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<a name="l32"></a> </span><span class=cF5>throw</span><span class=cF0>(</span><span class=cF6>'File'</span><span class=cF0>);
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<a name="l33"></a> </span><span class=cF7>}</span><span class=cF0>
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<a name="l34"></a> f->clus_buf = </span><span class=cF5>CAlloc</span><span class=cF0>(f->drive->spc << </span><span class=cF3>BLK_SIZE_BITS</span><span class=cF0>);
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<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>)
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<a name="l36"></a> </span><span class=cF7>{</span><span class=cF0>
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<a name="l37"></a> f->flags = f->flags | </span><span class=cF3>FF_WRITE</span><span class=cF0> | </span><span class=cF3>FF_NEEDS_WRITE</span><span class=cF0>;
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<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>)
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<a name="l39"></a> {
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<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, &f->de, </span><span class=cF3>FUF_JUST_FILES</span><span class=cF7>)</span><span class=cF0>)
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<a name="l41"></a> </span><span class=cF7>{</span><span class=cF0>
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<a name="l42"></a> </span><span class=cF5>Free</span><span class=cF0>(full_name);
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<a name="l43"></a> </span><span class=cF1>if</span><span class=cF0> (contiguous)
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<a name="l44"></a> f->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>) >> </span><span class=cF3>BLK_SIZE_BITS</span><span class=cF0> - </span><span class=cFE>1</span><span class=cF0>;
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<a name="l45"></a> </span><span class=cF1>return</span><span class=cF0> f;
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<a name="l46"></a> </span><span class=cF7>}</span><span class=cF0>
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<a name="l47"></a> }
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<a name="l48"></a> </span><span class=cF1>else</span><span class=cF0>
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<a name="l49"></a> </span><span class=cF5>Del</span><span class=cF0>(full_name,,, </span><span class=cF3>FALSE</span><span class=cF0>);
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<a name="l50"></a> f->de.full_name = full_name;
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<a name="l51"></a> f->flags |= </span><span class=cF3>FF_NEW_FILE</span><span class=cF0>;
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<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>)
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<a name="l53"></a> {
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<a name="l54"></a> </span><span class=cF5>StrCopy</span><span class=cF0>(f->de.name, dirc->mask);
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<a name="l55"></a> </span><span class=cF1>if</span><span class=cF0> (count > </span><span class=cFE>0</span><span class=cF0>)
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<a name="l56"></a> </span><span class=cF7>{</span><span class=cF2>//We pre-alloc the whole thing.</span><span class=cF0>
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<a name="l57"></a> f->de.clus = </span><span class=cF5>ClusAlloc</span><span class=cF0>(f->drive,</span><span class=cFE>0</span><span class=cF0>, </span><span class=cF7>(</span><span class=cF0>count + f->drive->spc - </span><span class=cFE>1</span><span class=cF7>)</span><span class=cF0> / f->drive->spc, contiguous);
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<a name="l58"></a> f->de.size = count << </span><span class=cF3>BLK_SIZE_BITS</span><span class=cF0>;
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<a name="l59"></a> </span><span class=cF5>DirNew</span><span class=cF0>(dirc->drive, </span><span class=cF5>Fs</span><span class=cF0>->cur_dir, &f->de, </span><span class=cF3>TRUE</span><span class=cF0>);
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<a name="l60"></a> f->flags &= ~</span><span class=cF3>FF_NEW_FILE</span><span class=cF0>;
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<a name="l61"></a> </span><span class=cF7>}</span><span class=cF0>
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<a name="l62"></a> </span><span class=cF5>DirContextDel</span><span class=cF0>(dirc);
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<a name="l63"></a> </span><span class=cF1>return</span><span class=cF0> f;
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<a name="l64"></a> }
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<a name="l65"></a> </span><span class=cF7>}</span><span class=cF0>
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<a name="l66"></a> </span><span class=cF1>else</span><span class=cF0>
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<a name="l67"></a> </span><span class=cF7>{</span><span class=cF0>
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<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, &f->de, </span><span class=cF3>FUF_JUST_FILES</span><span class=cF7>)</span><span class=cF0>)
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<a name="l69"></a> {
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<a name="l70"></a> </span><span class=cF5>Free</span><span class=cF0>(full_name);
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<a name="l71"></a> f->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>) >> </span><span class=cF3>BLK_SIZE_BITS</span><span class=cF0> - </span><span class=cFE>1</span><span class=cF0>;
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<a name="l72"></a> </span><span class=cF1>return</span><span class=cF0> f;
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<a name="l73"></a> }
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<a name="l74"></a> </span><span class=cF7>}</span><span class=cF0>
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<a name="l75"></a> </span><span class=cF5>Free</span><span class=cF0>(f->clus_buf);
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<a name="l76"></a> </span><span class=cF5>Free</span><span class=cF0>(full_name);
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<a name="l77"></a> </span><span class=cF5>Free</span><span class=cF0>(f);
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<a name="l78"></a>
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<a name="l79"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cF3>NULL</span><span class=cF0>;
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<a name="l80"></a>}
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<a name="l81"></a>
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<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)
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<a name="l83"></a>{</span><span class=cF2>//Close CFile, updating directory.</span><span class=cF0>
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<a name="l84"></a> </span><span class=cF9>CDirContext</span><span class=cF0> *dirc;
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<a name="l85"></a>
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<a name="l86"></a> </span><span class=cF1>if</span><span class=cF0> (f)
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<a name="l87"></a> </span><span class=cF7>{</span><span class=cF0>
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<a name="l88"></a> </span><span class=cF1>if</span><span class=cF0> (f->flags & </span><span class=cF3>FF_BUF_DIRTY</span><span class=cF0>)
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<a name="l89"></a> {
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<a name="l90"></a> </span><span class=cF5>ClusWrite</span><span class=cF0>(f->drive, f->clus_buf, f->clus, </span><span class=cFE>1</span><span class=cF0>);
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<a name="l91"></a> f->flags &= ~</span><span class=cF3>FF_BUF_DIRTY</span><span class=cF0>;
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<a name="l92"></a> }
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<a name="l93"></a> </span><span class=cF1>if</span><span class=cF0> (f->flags & </span><span class=cF3>FF_NEEDS_WRITE</span><span class=cF0>)
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<a name="l94"></a> {
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<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->de.full_name</span><span class=cF7>)</span><span class=cF0>)
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<a name="l96"></a> </span><span class=cF7>{</span><span class=cF0>
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<a name="l97"></a> </span><span class=cF1>if</span><span class=cF0> (!</span><span class=cF7>(</span><span class=cF0>f->flags & </span><span class=cF3>FF_USE_OLD_DATETIME</span><span class=cF7>)</span><span class=cF0>)
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<a name="l98"></a> f->de.datetime = </span><span class=cF5>Now</span><span class=cF0>;
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<a name="l99"></a> </span><span class=cF1>if</span><span class=cF0> (f->flags & </span><span class=cF3>FF_NEW_FILE</span><span class=cF0>)
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<a name="l100"></a> </span><span class=cF5>DirNew</span><span class=cF0>(dirc->drive, </span><span class=cF5>Fs</span><span class=cF0>->cur_dir, &f->de, </span><span class=cF3>TRUE</span><span class=cF0>);
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<a name="l101"></a> </span><span class=cF1>else</span><span class=cF0>
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<a name="l102"></a> </span><span class=cF5>DirNew</span><span class=cF0>(dirc->drive, </span><span class=cF5>Fs</span><span class=cF0>->cur_dir, &f->de, </span><span class=cF3>FALSE</span><span class=cF0>);
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<a name="l103"></a> </span><span class=cF5>DirContextDel</span><span class=cF0>(dirc);
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<a name="l104"></a> </span><span class=cF7>}</span><span class=cF0>
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<a name="l105"></a> </span><span class=cF1>else</span><span class=cF0>
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<a name="l106"></a> </span><span class=cF5>throw</span><span class=cF0>(</span><span class=cF6>'File'</span><span class=cF0>);
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<a name="l107"></a> }
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<a name="l108"></a> </span><span class=cF5>Free</span><span class=cF0>(f->clus_buf);
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<a name="l109"></a> </span><span class=cF5>Free</span><span class=cF0>(f->de.full_name);
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<a name="l110"></a> </span><span class=cF5>Free</span><span class=cF0>(f);
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<a name="l111"></a> </span><span class=cF7>}</span><span class=cF0>
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<a name="l112"></a>}
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<a name="l113"></a>
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<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)
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<a name="l115"></a>{
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<a name="l116"></a> </span><span class=cF9>CDrive</span><span class=cF0> *drive = f->drive;
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<a name="l117"></a> </span><span class=cF9>I64</span><span class=cF0> i;
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<a name="l118"></a>
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<a name="l119"></a> </span><span class=cF1>if</span><span class=cF0> (f->clus != c)
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<a name="l120"></a> </span><span class=cF7>{</span><span class=cF0>
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<a name="l121"></a> </span><span class=cF1>if</span><span class=cF0> (f->flags & </span><span class=cF3>FF_BUF_DIRTY</span><span class=cF0>)
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<a name="l122"></a> {
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<a name="l123"></a> i = drive->spc;
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<a name="l124"></a> </span><span class=cF1>if</span><span class=cF0> (f->max_blk != </span><span class=cF3>I64_MAX</span><span class=cF0>)
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<a name="l125"></a> </span><span class=cF7>{</span><span class=cF0>
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<a name="l126"></a> i = f->max_blk + </span><span class=cFE>1</span><span class=cF0> - f->file_clus_num * drive->spc;
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<a name="l127"></a> </span><span class=cF1>if</span><span class=cF0> (i > drive->spc)
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<a name="l128"></a> i = drive->spc;
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<a name="l129"></a> </span><span class=cF7>}</span><span class=cF0>
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<a name="l130"></a> </span><span class=cF5>ClusBlkWrite</span><span class=cF0>(drive, f->clus_buf, f->clus, i);
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<a name="l131"></a> f->flags = f->flags & ~</span><span class=cF3>FF_BUF_DIRTY</span><span class=cF0>;
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<a name="l132"></a> }
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<a name="l133"></a> f->clus = c;
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<a name="l134"></a> f->file_clus_num = blk / drive->spc;
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<a name="l135"></a> </span><span class=cF1>if</span><span class=cF0> (read)
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<a name="l136"></a> {
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<a name="l137"></a> i = drive->spc;
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<a name="l138"></a> </span><span class=cF1>if</span><span class=cF0> (f->max_blk != </span><span class=cF3>I64_MAX</span><span class=cF0>)
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<a name="l139"></a> </span><span class=cF7>{</span><span class=cF0>
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<a name="l140"></a> i = f->max_blk + </span><span class=cFE>1</span><span class=cF0> - f->file_clus_num * drive->spc;
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<a name="l141"></a> </span><span class=cF1>if</span><span class=cF0> (i > drive->spc)
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<a name="l142"></a> i = drive->spc;
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<a name="l143"></a> </span><span class=cF7>}</span><span class=cF0>
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<a name="l144"></a> c = </span><span class=cF5>ClusBlkRead</span><span class=cF0>(drive, f->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->drive;
|
|
<a name="l154"></a> </span><span class=cF9>I64</span><span class=cF0> spc = drive->spc, i, j, c = f->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->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> > f->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 <= </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->flags & </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> <= f->file_clus_num <= i)
|
|
<a name="l174"></a> {
|
|
<a name="l175"></a> c = f->clus;
|
|
<a name="l176"></a> i -= f->file_clus_num;
|
|
<a name="l177"></a> }
|
|
<a name="l178"></a> </span><span class=cF1>if</span><span class=cF0> (i > </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 < 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->clus_buf + i << </span><span class=cF3>BLK_SIZE_BITS</span><span class=cF0>, j << </span><span class=cF3>BLK_SIZE_BITS</span><span class=cF0>);
|
|
<a name="l189"></a> buf += j << </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 >= 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->clus_buf, spc << </span><span class=cF3>BLK_SIZE_BITS</span><span class=cF0>);
|
|
<a name="l197"></a> buf += spc << </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 > </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->clus_buf, count << </span><span class=cF3>BLK_SIZE_BITS</span><span class=cF0>);
|
|
<a name="l205"></a> buf += count<<</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->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->drive;
|
|
<a name="l217"></a> </span><span class=cF9>I64</span><span class=cF0> spc = drive->spc, i, j, c = f->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->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> > f->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->flags & </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 <= </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->flags & </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->file_clus_num = </span><span class=cFE>0</span><span class=cF0>;
|
|
<a name="l240"></a> f->clus = c;
|
|
<a name="l241"></a> f->de.clus = c;
|
|
<a name="l242"></a> f->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> <= f->file_clus_num <= i)
|
|
<a name="l246"></a> {
|
|
<a name="l247"></a> c = f->clus;
|
|
<a name="l248"></a> i -= f->file_clus_num;
|
|
<a name="l249"></a> }
|
|
<a name="l250"></a> </span><span class=cF1>while</span><span class=cF0> (i > </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 > </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 < 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->clus_buf + </span><span class=cF3>BLK_SIZE</span><span class=cF0> * i, buf, j << </span><span class=cF3>BLK_SIZE_BITS</span><span class=cF0>);
|
|
<a name="l273"></a> f->flags |= </span><span class=cF3>FF_BUF_DIRTY</span><span class=cF0>;
|
|
<a name="l274"></a> buf += j << </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 > </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 >= 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->clus_buf, buf, spc << </span><span class=cF3>BLK_SIZE_BITS</span><span class=cF0>);
|
|
<a name="l289"></a> f->flags |= </span><span class=cF3>FF_BUF_DIRTY</span><span class=cF0>;
|
|
<a name="l290"></a> buf += spc << </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 > </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 > </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->clus_buf, buf, count << </span><span class=cF3>BLK_SIZE_BITS</span><span class=cF0>);
|
|
<a name="l305"></a> f->flags |= </span><span class=cF3>FF_BUF_DIRTY</span><span class=cF0>;
|
|
<a name="l306"></a> buf += count << </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->de.size < blk << </span><span class=cF3>BLK_SIZE_BITS</span><span class=cF0>)
|
|
<a name="l310"></a> f->de.size = blk << </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->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>
|
|
</html>
|