skipf
skipf = 0; /* not skipping an input line */
static int skipf; /* if skipf == 1, skip rest of input line */
if (skipf) {
skipf = 0;
skipf = 1; /* note skip in progress */
skipf ((int)nlines);
skipf ((int)-nlines);
static void skipf(register int nskip);
static int skipf(int);
if ((skip = skipf(sign *nlines)) == 0) {
if ((skip = skipf(-sign * nlines)) == 0) {