STATE_BSIZE
Lex_state states[STATE_BSIZE], *statep;
state_info.end = &states[STATE_BSIZE];
Lex_state *new = areallocarray(NULL, STATE_BSIZE,
si->end = &new[STATE_BSIZE];
si->base = old_end->ls_info.base - STATE_BSIZE;
return si->base + STATE_BSIZE - 1;
base = s-- - STATE_BSIZE;