roxml_nav.c

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#include "roxml_internal.h"
 
ROXML_API node_t *roxml_get_prev_sibling(node_t *n)
{
        node_t *prev = NULL;
        node_t *prev_elm = NULL;
 
        if (n == ROXML_INVALID_DOC)
                return ROXML_INVALID_DOC;
 
        if (n->prnt) {
                prev = n->prnt->chld;
                while (prev && prev != n) {
                        if ((prev->type & ROXML_NODE_TYPES) == ROXML_ELM_NODE) {
                                prev_elm = prev;
                        }
                        prev = prev->sibl;
                }
        }
        return prev_elm;
}
 
ROXML_API node_t *roxml_get_next_sibling(node_t *n)
{
        if (n == ROXML_INVALID_DOC)
                return ROXML_INVALID_DOC;
 
        while (n->sibl && (n->sibl->type & ROXML_NODE_TYPES) != ROXML_ELM_NODE) {
                n = n->sibl;
        }
        return n->sibl;
}
 
ROXML_API node_t *roxml_get_parent(node_t *n)
{
        if (n == ROXML_INVALID_DOC)
                return ROXML_INVALID_DOC;
 
        if (n->prnt == NULL)
                return n;
        return n->prnt;
}
 
ROXML_API node_t *roxml_get_root(node_t *n)
{
        node_t *root;
 
        if (n == ROXML_INVALID_DOC)
                return ROXML_INVALID_DOC;
 
        root = n;
        while (root->prnt)
                root = root->prnt;
        return root;
}