pskip
p = pskip(q);
q = pskip(p);
(void) pskip(&msg[6]);
p = pskip(&msg[3]);
q = pskip(p);
static char *pskip();
int pskip; /* previous line was skipped */
pskip = pvalid = FALSE;
if (!pskip) {
pskip = TRUE;
pskip = FALSE;
bt_psplit(t, h, l, r, pskip, ilen)
indx_t *pskip;
skip = *pskip;
*pskip -= nxt;