chunkline_get_line_collated
while(chunkline_get_line_collated(chunk, chunk_pos, buf)) {
while(chunkline_get_line_collated(&chunk, &chunk_pos, scratch_buffer)) {
while(chunkline_get_line_collated(chunk, chunk_pos, buf)) {
while(chunkline_get_line_collated(&chunk, &chunk_pos, scratch_buffer)) {