fixed = preimage->buf;
for (i = reduced = ctx = 0; i < postimage->nr; i++) {
size_t l_len = postimage->line[i].len;
if (!(postimage->line[i].flag & LINE_COMMON)) {
/* an added line -- no counterparts in preimage */
fixed = preimage->buf;
for (i = reduced = ctx = 0; i < postimage->nr; i++) {
size_t l_len = postimage->line[i].len;
if (!(postimage->line[i].flag & LINE_COMMON)) {
/* an added line -- no counterparts in preimage */