OOBCH
if (s->lastch == OOBCH) {
p[pos++] = OOBCH;
if (val >= OOBCH)
s->lastch = OOBCH;
s->equiv[1] = OOBCH;
for (lastch = OOBCH; (ch = getchar()) != EOF; )
for (lastch = OOBCH; (ch = getchar()) != EOF;)
for (lastch = OOBCH; (ch = getchar()) != EOF;) {