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Simplify DOM node walker.

This commit is contained in:
Michael Drake 2014-03-31 22:08:54 +01:00
parent 0adbfe125e
commit 9c60417f73
1 changed files with 24 additions and 40 deletions
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64
utils/libdom.c
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@ -50,58 +50,42 @@ bool libdom_treewalk(dom_node *root,
break;
}
if (next != NULL) { /* 1. children */
if (next != NULL) {
/* 1. Got children */
dom_node_unref(node);
node = next;
} else {
exc = dom_node_get_next_sibling(node, &next);
if (exc != DOM_NO_ERR) {
dom_node_unref(node);
break;
}
if (next != NULL) { /* 2. siblings */
dom_node_unref(node);
node = next;
} else { /* 3. ancestor siblings */
while (node != NULL) {
exc = dom_node_get_next_sibling(node,
&next);
if (exc != DOM_NO_ERR) {
dom_node_unref(node);
node = NULL;
break;
}
if (next != NULL) {
dom_node_unref(next);
break;
}
exc = dom_node_get_parent_node(node,
&next);
if (exc != DOM_NO_ERR) {
dom_node_unref(node);
node = NULL;
break;
}
dom_node_unref(node);
node = next;
}
if (node == NULL)
break;
/* No children; siblings & ancestor's siblings */
while (node != NULL) {
exc = dom_node_get_next_sibling(node, &next);
if (exc != DOM_NO_ERR) {
dom_node_unref(node);
node = NULL;
break;
}
if (next != NULL) {
/* 2. Got sibling */
break;
}
exc = dom_node_get_parent_node(node, &next);
if (exc != DOM_NO_ERR) {
dom_node_unref(node);
node = NULL;
break;
}
/* 3. Try parent */
dom_node_unref(node);
node = next;
}
if (node == NULL)
break;
dom_node_unref(node);
node = next;
}
assert(node != NULL);