node_relink

SFL
Version 2.11

`node_relink`

#include "sflnode.h"
void *
node_relink (
    void *left,
    void *node,
    void *right)

Synopsis

Links the node into a linked list. This is a general-purpose function that can be used to attach and remove nodes anywhere in a list. Sets the global variable 'node_unsafe' while the list is being changed. Returns the address of node.

Source Code - (sflnode.c)

{
    NODE *swap;

    node_unsafe = TRUE;
    swap = ((NODE *) left)-> next;      /*  Exchange left pointers           */
           ((NODE *) left)-> next = ((NODE *) node)-> next;
                                    ((NODE *) node)-> next = swap;

    swap = ((NODE *) right)-> prev;     /*  Exchange right pointers          */
           ((NODE *) right)-> prev = ((NODE *) node)-> prev;
                                     ((NODE *) node)-> prev = swap;
    node_unsafe = FALSE;
    return (node);
}

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