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14<h1>DVDConvertPathToEntrynum</h1>
15
16<h2>Syntax</h2>
17<dl><dd><pre class="construction">
18#include &lt;revolution/dvd.h&gt;
19
20s32 DVDConvertPathToEntrynum(const char* fileName);
21</pre></dd></dl>
22
23<h2>Arguments</h2>
24<TABLE class="arguments" border="1" >
25  <tr>
26<TH>fileName</TH>
27<TD>Pointer to a file name to convert.</TD>
28    </tr>
29</TABLE>
30
31<h2>Return Values</h2>
32<p>Returns the entry number if the file is found, -1 if the file is not found.</p>
33
34<H2>Description</H2>
35<P>Converts a file name to an entry number. The entry number is a unique number assigned to a file. After an entry number is obtained for a file, call the <A href="DVDFastOpen.html"><CODE>DVDFastOpen</CODE></A> function. The <CODE><A href="DVDFastOpen.html">DVDFastOpen</A></CODE> function opens the file quicker than <A href="DVDOpen.html"><CODE>DVDOpen</CODE></A>.</P>
36<P>This function is also used to check whether a file exists. If <STRONG><code><em>fileName</em></code></STRONG> doesn't exist, you can check for the file easily because the <code>DVDConvertPathToEntrynum</code> function returns -1. Using the <A href="DVDOpen.html"><CODE>DVDOpen</CODE></A> function for this purpose is undesirable, because the <A href="DVDOpen.html"><CODE>DVDOpen</CODE></A> function displays a warning message if the specified file does not exist. Even if <SPAN class="argument">fileName</SPAN> does not exist, the <CODE>DVDConvertPathToEntrynum</CODE> function will not display a message.</P>
37<P>Because the <CODE>DVDConvertPathToEntrynum</CODE> function returns a unique entry number, the number can be used for the user's own purposes, for example, as a file ID for managing a file cache system. Note that this number changes with the next <CODE>ndrun</CODE>, especially after you add, delete or move files, or change disc layout.</P>
38
39<h2>See Also</h2>
40<p class="reference">
41<a href="DVDFastOpen.html">DVDFastOpen</a>
42</p>
43
44<H2>Revision History</H2>
45<P>
462006/03/01 Initial version.<BR>
47</P>
48
49<hr><p>CONFIDENTIAL</p></body>
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