/*
* Determine if the sky is blue by checking that it isn't night.
* CAVEAT: Only sometimes right. May return TRUE when the answer
* is FALSE. Consider clouds, eclipses, short days.
* NOTE: Uses `hour' from `hightime.c'. Returns `int' for
* compatibility with the old version.
*/
int /* true or false */
skyblue(void)
{
extern int hour; /* current hour of the day */
return (hour >= MORNING && hour <= EVENING);
}
/*
* Find the last element in the linked list
* pointed to by nodep and return a pointer to it.
* Return NULL if there is no last element.
*/
node_t *
tail(node_t *nodep)
{
node_t *np; /* advances to NULL */
node_t *lp; /* follows one behind np */
if (nodep == NULL)
return (NULL);
for (np = lp = nodep; np != NULL; lp = np, np = np->next)
; /* VOID */
return (lp);
}