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<body lang="EN-US" link="#0563C1" vlink="#954F72">Hello!<br>
<br>
See the init_list() function and the list structure. All lists in lib/lists.[hc] have heads. Therefore if n->prev is NULL, you don't have a valid node but a list head, the same for list tail and n->next. <br>
<br>
All valid nodes have valid both prev and next pointers.<br>
<br>
Maria <br><br><div class="gmail_quote">On July 27, 2018 8:53:18 AM GMT+02:00, Arvin Gan <AGan@advaoptical.com> wrote:<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div class="WordSection1">
<p class="MsoNormal">Hi all,<o:p></o:p></p>
<p class="MsoNormal"> There may be an issue in blow function when deleted the node is the first one, that mean n->prev is NULL….., similarly, same issue as the last one node is deleted.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">LIST_INLINE void<o:p></o:p></p>
<p class="MsoNormal">rem_node(node *n)<o:p></o:p></p>
<p class="MsoNormal">{<o:p></o:p></p>
<p class="MsoNormal"> node *z = n->prev;<o:p></o:p></p>
<p class="MsoNormal"> node *x = n->next;<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"> z->next = x;<o:p></o:p></p>
<p class="MsoNormal"> x->prev = z;<o:p></o:p></p>
<p class="MsoNormal"> n->next = NULL;<o:p></o:p></p>
<p class="MsoNormal"> n->prev = NULL;<o:p></o:p></p>
<p class="MsoNormal">}<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks<o:p></o:p></p>
<p class="MsoNormal">Arvin<o:p></o:p></p>
</div>
</blockquote></div><br>
-- <br>
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