>.
 <p>
 The character array may be larger than the active area to be matched.
 Only values in the buffer between the specifed indices may be accessed.
 <p>
 The matching code may check one character or many.
 It may check characters preceding <code>pos</code> as well as those
 after, so long as no checks exceed the bounds specified.
 <p>
 It must return zero for no match, or a positive number if a match was found.
 The number indicates the number of characters that matched.</div>
<dl><dt><span class="stron