660   struct seq seq1, seq2;  in join()  local
668   initseq (&seq1);  in join()
669   getseq (fp1, &seq1, 1);  in join()
675       autocount_1 = seq1.count ? seq1.lines[0]->nfields : 0;  in join()
679   if (join_header_lines && (seq1.count || seq2.count))  in join()
681       struct line const *hline1 = seq1.count ? seq1.lines[0] : &uni_blank;  in join()
686       if (seq1.count)  in join()
687         advance_seq (fp1, &seq1, true, 1);  in join()
692   while (seq1.count && seq2.count)  in join()
694       diff = keycmp (seq1.lines[0], seq2.lines[0],  in join()
699             prjoin (seq1.lines[0], &uni_blank);  in join()
700           advance_seq (fp1, &seq1, true, 1);  in join()
717         if (!advance_seq (fp1, &seq1, false, 1))  in join()
720             ++seq1.count;  in join()
723       while (!keycmp (seq1.lines[seq1.count - 1], seq2.lines[0],  in join()
736       while (!keycmp (seq1.lines[0], seq2.lines[seq2.count - 1],  in join()
741           for (idx_t i = 0; i < seq1.count - 1; ++i)  in join()
745                 prjoin (seq1.lines[i], seq2.lines[j]);  in join()
751           SWAPLINES (seq1.lines[0], seq1.lines[seq1.count - 1]);  in join()
752           seq1.count = 1;  in join()
755         seq1.count = 0;  in join()
777   if ((print_unpairables_1 || checktail) && seq1.count)  in join()
780         prjoin (seq1.lines[0], &uni_blank);  in join()
796       if (seq1.count)  in join()
810   delseq (&seq1);  in join()