+ // apply max_nm
+ if (max_nm > 0 && nm >= max_nm) {
+ for (i = y = 0, x = c->pos; i < c->n_cigar; ++i) {
+ int j, l = cigar[i]>>4, op = cigar[i]&0xf;
+ if (op == BAM_CMATCH) {
+ for (j = 0; j < l; ++j) {
+ int z = y + j;
+ int c1 = bam1_seqi(seq, z), c2 = bam_nt16_table[(int)ref[x+j]];
+ if (ref[x+j] == 0) break; // out of boundary
+ if ((c1 == c2 && c1 != 15 && c2 != 15) || c1 == 0) { // a match
+ seq[z/2] |= (z&1)? 0x0f : 0xf0;
+ bam1_qual(b)[z] = 0;
+ }
+ }
+ if (j < l) break;
+ x += l; y += l;
+ } else if (op == BAM_CDEL || op == BAM_CREF_SKIP) x += l;
+ else if (op == BAM_CINS || op == BAM_CSOFT_CLIP) y += l;
+ }
+ }
+ // update NM
+ old_nm = bam_aux_get(b, "NM");
+ if (c->flag & BAM_FUNMAP) return;
+ if (old_nm) old_nm_i = bam_aux2i(old_nm);
+ if (!old_nm) bam_aux_append(b, "NM", 'i', 4, (uint8_t*)&nm);
+ else if (nm != old_nm_i) {
+ fprintf(stderr, "[bam_fillmd1] different NM for read '%s': %d -> %d\n", bam1_qname(b), old_nm_i, nm);
+ bam_aux_del(b, old_nm);
+ bam_aux_append(b, "NM", 'i', 4, (uint8_t*)&nm);
+ }
+ // update MD
+ old_md = bam_aux_get(b, "MD");