kw_len
int subst_len, kw_len, subst_count, old_len, new_len;
kw_len = strlen(kw);
for (p = real, subst_count = 0;; p = p1 + kw_len, subst_count++) {
new_len = old_len + (subst_len - kw_len) * subst_count;
p = p1 + kw_len;
case kw_len:
kw_length = kw_len,
kw_size = kw_len,