Пример #1
0
static int gt_inlineseq_split_runner(int argc, const char **argv,
                                     int parsed_args,
                              void *tool_arguments, GtError *err)
{
  GtInlineseqSplitArguments *arguments = tool_arguments;
  GtNodeStream *gff3_in_stream = NULL,
               *gff3_out_stream = NULL,
               *split_stream = NULL,
               *last_stream = NULL;
  GtFile *seq_out_file = NULL,
         *gff3_out_file = NULL;
  int had_err = 0;

  gt_error_check(err);
  gt_assert(arguments);

  if (gt_str_length(arguments->seqoutfile) > 0) {
    seq_out_file = gt_file_new(gt_str_get(arguments->seqoutfile), "w+", err);
    if (!seq_out_file)
      had_err = -1;
  }

  if (!had_err && gt_str_length(arguments->gffoutfile) > 0) {
    gff3_out_file = gt_file_new(gt_str_get(arguments->gffoutfile), "w+", err);
    if (!gff3_out_file)
      had_err = -1;
  }

  if (!had_err) {
    last_stream = gff3_in_stream = gt_gff3_in_stream_new_unsorted(
                                                            argc - parsed_args,
                                                            argv + parsed_args);
    gt_assert(gff3_in_stream);
  }

  if (!had_err) {
    last_stream = split_stream = gt_sequence_node_out_stream_new(last_stream,
                                                                 seq_out_file,
                                                                 err);
    gt_assert(split_stream);
  }

  if (!had_err) {
    last_stream = gff3_out_stream = gt_gff3_out_stream_new(last_stream,
                                                           gff3_out_file);
    had_err = gt_node_stream_pull(last_stream, err);
  }

  gt_node_stream_delete(gff3_in_stream);
  gt_node_stream_delete(gff3_out_stream);
  gt_node_stream_delete(split_stream);
  gt_file_delete(seq_out_file);
  gt_file_delete(gff3_out_file);

  return had_err;
}
Пример #2
0
static int create_manpage(const char *outdir, const char *toolname,
                          GtOptionParser *option_parser, GtError *err)
{
  GtFile *outfile = NULL;
  GtStr *man, *pathbuf;
  char *utoolname;
  int had_err = 0;
  gt_error_check(err);
  gt_assert(outdir && toolname && option_parser);
  man = gt_str_new();
  pathbuf = gt_str_new_cstr(outdir);
  utoolname = gt_cstr_dup(toolname);
  gt_cstr_rep(utoolname, ' ', '_');
  if (!gt_file_exists(gt_str_get(pathbuf)))
    gt_xmkdir(gt_str_get(pathbuf));
  gt_str_append_char(pathbuf, GT_PATH_SEPARATOR);
  gt_str_append_cstr(pathbuf, utoolname);
  gt_str_append_cstr(pathbuf, ".mansrc");
  gt_free(utoolname);
  if (!(outfile = gt_file_new(gt_str_get(pathbuf), "w+", err)))
    had_err = -1;
  if (!had_err)
    had_err = gt_option_parser_manpage(option_parser, toolname, man, err);
  if (!had_err)
    gt_file_xprintf(outfile, "%s", gt_str_get(man));
  gt_file_delete(outfile);
  gt_str_delete(pathbuf);
  gt_str_delete(man);
  return had_err;
}
Пример #3
0
static void canon_gff3_parse_options(int argc, char * const *argv,
                                     CanonGFF3Options *options, GtError *error)
{
  int opt = 0;
  int optindex = 0;
  const char *optstr = "hio:s:v";
  const struct option init_options[] =
  {
    { "help",    no_argument,       NULL, 'h' },
    { "infer",   no_argument,       NULL, 'i' },
    { "outfile", required_argument, NULL, 'o' },
    { "source",  required_argument, NULL, 's' },
    { "version", no_argument,       NULL, 'v' },
    { NULL,      no_argument,       NULL, 0 },
  };

  for(opt = getopt_long(argc, argv, optstr, init_options, &optindex);
      opt != -1;
      opt = getopt_long(argc, argv, optstr, init_options, &optindex))
  {
    if(opt == 'h')
    {
      print_usage(stdout);
      exit(0);
    }
    else if(opt == 'i')
      options->infer = true;
    else if(opt == 'o')
    {
      if(options->outstream != NULL)
        gt_file_delete(options->outstream);
      options->outstream = gt_file_new(optarg, "w", error);
    }
    else if(opt == 's')
    {
      if(options->source != NULL)
        gt_str_delete(options->source);
      options->source = gt_str_new_cstr(optarg);
    }
    else if(opt == 'v')
    {
      agn_print_version("CanonGFF3", stdout);
      exit(0);
    }
  }
}
Пример #4
0
static int gtf_in_stream_process_file(GtGTFInStream *gtf_in_stream,
                                      GtError *err)
{
  GtGTFParser *gtf_parser;
  GtStr *filenamestr;
  GtFile *fpin;
  int had_err = 0;
  gt_error_check(err);
  gt_assert(gtf_in_stream);

  gtf_parser = gt_gtf_parser_new(gtf_in_stream->type_checker);

  /* open input file */
  if (gtf_in_stream->filename) {
    if (!(fpin = gt_file_new(gtf_in_stream->filename, "r", err)))
      had_err = -1;
  }
  else
    fpin = NULL;

  /* parse input file */
  if (!had_err) {
    filenamestr = gt_str_new_cstr(gtf_in_stream->filename
                                  ? gtf_in_stream->filename : "stdin");
    had_err = gt_gtf_parser_parse(gtf_parser, gtf_in_stream->genome_node_buffer,
                                  filenamestr, fpin, gtf_in_stream->tidy, err);
    gt_str_delete(filenamestr);
  }

  /* close input file, if necessary */
  gt_file_delete(fpin);

  /* free */
  gt_gtf_parser_delete(gtf_parser);

  return had_err;
}
Пример #5
0
int gt_condenseq_output_to_gff3(const GtCondenseq *condenseq,
                                GtError *err)
{
  int had_err = 0;
  GtUword idx,
          name_len,
          seqnum = 0, seqstart = 0, seqend = 0,
          desclen;
  GtStr *filename = NULL,
        *id = gt_str_new_cstr("U"),
        *name = gt_str_new_cstr("unique"),
        *parent_unique = gt_str_new_cstr("U"),
        *seqid = gt_str_new(),
        *source = gt_str_new_cstr("Condenseq");
  GtFile *outfile = NULL;
  GtGFF3Visitor *gffv = NULL;
  GtNodeVisitor *nodev = NULL;
  GtFeatureNode *fnode = NULL;
  GtGenomeNode *node = NULL;
  GtRange range;

  gt_assert(condenseq != NULL);

  filename = gt_str_new_cstr(gt_condenseq_basefilename(condenseq));

  name_len = gt_str_length(name);
  gt_str_append_cstr(filename, ".gff3");
  outfile = gt_file_new(gt_str_get(filename), "w", err);
  nodev = gt_gff3_visitor_new(outfile);
  gffv = (GtGFF3Visitor *) nodev;
  gt_gff3_visitor_retain_id_attributes(gffv);

  node = gt_feature_node_new(seqid, "experimental_feature", (GtUword) 1,
                             (GtUword) 1, GT_STRAND_BOTH);
  fnode = (GtFeatureNode*) node;
  gt_feature_node_set_source(fnode, source);
  for (idx = 0; !had_err && idx < condenseq->udb_nelems; ++idx) {
    GtCondenseqUnique uq = condenseq->uniques[idx];
    if (seqend <= uq.orig_startpos) {
      const char *desc;
      gt_genome_node_delete(node);
      seqnum = gt_condenseq_pos2seqnum(condenseq, uq.orig_startpos);
      seqstart = gt_condenseq_seqstartpos(condenseq, seqnum);
      seqend = seqstart + condenseq_seqlength_help(condenseq, seqnum, seqstart);
      desc = gt_condenseq_description(condenseq, &desclen, seqnum);
      gt_str_reset(seqid);
      gt_str_append_cstr_nt(seqid, desc, desclen);
      node = gt_feature_node_new(seqid, "experimental_feature", (GtUword) 1,
                                 (GtUword) 1, GT_STRAND_BOTH);
      fnode = (GtFeatureNode*) node;
      gt_feature_node_set_source(fnode, source);
    }
    gt_str_set_length(name, name_len);
    gt_str_append_uword(name, idx);
    gt_str_set_length(id, (GtUword) 1);
    gt_str_append_uword(id, idx);
    gt_feature_node_set_attribute(fnode, "Name", gt_str_get(name));
    gt_feature_node_set_attribute(fnode, "ID", gt_str_get(id));
    /* 1 Based coordinates! */
    range.start = uq.orig_startpos + 1 - seqstart;
    range.end = uq.orig_startpos + uq.len - seqstart;
    gt_genome_node_set_range(node, &range);
    had_err = gt_genome_node_accept(node, nodev, err);
  }
  gt_str_reset(name);
  gt_str_append_cstr(name, "link");
  gt_str_reset(id);
  gt_str_append_cstr(id, "L");
  name_len = gt_str_length(name);
  seqend = 0;
  for (idx = 0; !had_err && idx < condenseq->ldb_nelems; ++idx) {
    GtCondenseqLink link = condenseq->links[idx];
    if (seqend <= link.orig_startpos) {
      const char *desc;
      gt_genome_node_delete(node);
      seqnum = gt_condenseq_pos2seqnum(condenseq, link.orig_startpos);
      seqstart = gt_condenseq_seqstartpos(condenseq, seqnum);
      seqend = seqstart + condenseq_seqlength_help(condenseq, seqnum, seqstart);
      desc = gt_condenseq_description(condenseq, &desclen, seqnum);
      gt_str_reset(seqid);
      gt_str_append_cstr_nt(seqid, desc, desclen);
      node = gt_feature_node_new(seqid, "experimental_feature", (GtUword) 1,
                                 (GtUword) 1, GT_STRAND_BOTH);
      fnode = (GtFeatureNode*) node;
      gt_feature_node_set_source(fnode, source);
    }
    gt_str_set_length(name, name_len);
    gt_str_append_uword(name, idx);
    gt_str_set_length(id, (GtUword) 1);
    gt_str_append_uword(id, idx);
    gt_feature_node_set_attribute(fnode, "Name", gt_str_get(name));
    gt_feature_node_set_attribute(fnode, "ID", gt_str_get(id));
    gt_str_set_length(parent_unique, (GtUword) 1);
    gt_str_append_uword(parent_unique, link.unique_id);
    gt_feature_node_set_attribute(fnode, "Derives_from",
                                  gt_str_get(parent_unique));
    /* 1 Based coordinates! */
    range.start = link.orig_startpos + 1 - seqstart;
    range.end = link.orig_startpos + link.len - seqstart;
    gt_genome_node_set_range(node, &range);
    had_err = gt_genome_node_accept(node, nodev, err);
  }
  gt_file_delete(outfile);
  gt_genome_node_delete(node);
  gt_node_visitor_delete(nodev);
  gt_str_delete(filename);
  gt_str_delete(id);
  gt_str_delete(name);
  gt_str_delete(parent_unique);
  gt_str_delete(seqid);
  gt_str_delete(source);
  return had_err;
}
Пример #6
0
void vcfoutput_init(VcfOutput *v, const char *of) {
  gt_assert(v);
  gt_assert(of);
  GtError *err = gt_error_new();
  v->file = gt_file_new(of,"w", err);
}
int main(int argc, char ** argv)
{
    GtNodeStream * in, * score, * out;
    GtFile * out_file;
    GtError * err;

    if (argc != 4)
    {
       usage(argv[0]);
       exit(1);
    }

    // initilaize genometools
    gt_lib_init();
    err = gt_error_new();

    if (!(in = gt_gff3_in_stream_new_sorted(argv[1])))
    {
        fprintf(stderr, "Failed to open input stream with arg %s\n", argv[1]);
        exit(1);
    }

    if (!(out_file = gt_file_new(argv[2], "w+", err)))
    {
        gt_node_stream_delete(in);
        fprintf(stderr, "Failed to create output file %s\n", argv[2]);
        exit(1);
    }

    if (!(score = CpGI_score_stream_new(in, argv[3])))
    {

        gt_file_delete(out_file);
        gt_node_stream_delete(in);
        fprintf(stderr, "Failed to create CpGI score stream\n");
        exit(1);
    }
    out = gt_gff3_out_stream_new(in, out_file);
    
    if (!(out = gt_gff3_out_stream_new(score, out_file)))
    {
        gt_node_stream_delete(score);
        gt_file_delete(out_file);
        gt_node_stream_delete(in);
        fprintf(stderr, "Failed to create output stream\n");
        exit(1);
    }

    if (gt_node_stream_pull(out, err))
    {
        fprintf(stderr, "Failed to pull through out stream\n");
    }

    // close genome tools
    gt_node_stream_delete(out);
    gt_node_stream_delete(score);
    gt_file_delete(out_file);
    gt_node_stream_delete(in);
    gt_error_delete(err);
    gt_lib_clean();
    return 0;
}
static int gt_condenser_search_runner(GT_UNUSED int argc,
                                      GT_UNUSED const char **argv,
                                      GT_UNUSED int parsed_args,
                                      void *tool_arguments,
                                      GtError *err)
{
  GtCondenserSearchArguments *arguments = tool_arguments;
  int i, had_err = 0;
  char *querypath = gt_str_get(arguments->querypath);
  GtStr* coarse_fname = gt_str_new_cstr("coarse_");
  char *db_basename = NULL;
  char *suffix_ptr = NULL;
  GtTimer *timer = NULL;
  GtLogger *logger = NULL;

  gt_error_check(err);
  gt_assert(arguments);

  logger = gt_logger_new(arguments->verbose, GT_LOGGER_DEFLT_PREFIX, stderr);

  db_basename = gt_basename(gt_str_get(arguments->dbpath));
  /* if first char is '.' this might be a hidden file */
  if (strlen(db_basename) > (size_t) 1 &&
      (suffix_ptr = strrchr(db_basename + 1, '.')) != NULL) {
    /* remove suffix */
    *suffix_ptr = '\0';
  }
  gt_str_append_cstr(coarse_fname, db_basename);
  gt_str_append_cstr(coarse_fname, ".fas");
  gt_free(db_basename);
  db_basename = NULL;
  suffix_ptr = NULL;

  if (arguments->blastn || arguments->blastp) {
    GtMatch              *match;
    GtMatchIterator      *mp = NULL;
    GtNREncseq           *nrencseq = NULL;
    GtStr                *fastaname = gt_str_clone(arguments->dbpath);
    HitPosition          *hits;
    double                eval,
                          raw_eval = 0.0;
    GtUword               coarse_db_len = 0;
    GtMatchIteratorStatus status;
    int                   curr_hits = 0,
                          max_hits = 100;

    hits = gt_malloc(sizeof (*hits) * (size_t) max_hits);

    gt_str_append_cstr(fastaname, ".fas");

    for (i=0; i < max_hits; i++) {
      hits[i].range = gt_malloc(sizeof (*hits[i].range) * (size_t) 1);
    }

    if (gt_showtime_enabled()) {
      timer = gt_timer_new_with_progress_description("initialization");
      gt_timer_start(timer);
    }

    /*extract sequences from compressed database*/
    if (!had_err) {
      nrencseq = gt_n_r_encseq_new_from_file(gt_str_get(arguments->dbpath),
                                             logger, err);
      if (nrencseq == NULL)
        had_err = -1;
    }
    if (!had_err) {
      if (arguments->ceval == GT_UNDEF_DOUBLE ||
          arguments->feval == GT_UNDEF_DOUBLE) {
        /* from NCBI BLAST tutorial:
           E = Kmne^{-lambdaS}
           calculates E-value for score S with natural scale parameters K for
           search space size and lambda for the scoring system
           E = mn2^-S'
           m being the subject (total) length, n the length of ONE query
           calculates E-value for bit-score S'
         */
        GtFastaReader *reader;
        GtCondenserSearchAvg avg = {0,0};
        reader = gt_fasta_reader_rec_new(arguments->querypath);
        had_err = gt_fasta_reader_run(reader, NULL, NULL,
                                      gt_condenser_search_cum_moving_avg,
                                      &avg,
                                      err);
        if (!had_err) {
          GtUword S = arguments->bitscore;
          gt_log_log(GT_WU " queries, avg query size: " GT_WU,
                     avg.count, avg.avg);
          raw_eval = 1/pow(2.0, (double) S) * avg.avg;
          gt_logger_log(logger, "Raw E-value set to %.4e", raw_eval);
          gt_assert(avg.avg != 0);
        }
        gt_fasta_reader_delete(reader);
      }
    }

    /*create BLAST database from compressed database fasta file*/
    if (!had_err) {
      if (timer != NULL)
        gt_timer_show_progress(timer, "create coarse BLAST db", stderr);
      if (arguments->blastn)
        had_err = gt_condenser_search_create_nucl_blastdb(gt_str_get(fastaname),
                                                          err);
      else
        had_err = gt_condenser_search_create_prot_blastdb(gt_str_get(fastaname),
                                                          err);
    }

    if (!had_err) {
      GtBlastProcessCall *call;

      if (timer != NULL)
        gt_timer_show_progress(timer, "coarse BLAST run", stderr);

      if (arguments->blastp)
        call = gt_blast_process_call_new_prot();
      else
        call = gt_blast_process_call_new_nucl();
      gt_blast_process_call_set_db(call, gt_str_get(fastaname));
      gt_blast_process_call_set_query(call, querypath);
      gt_blast_process_call_set_evalue(call, arguments->ceval);
      gt_blast_process_call_set_num_threads(call, arguments->blthreads);

      mp = gt_match_iterator_blast_process_new(call, err);
      if (!mp)
        had_err = -1;

      gt_blast_process_call_delete(call);

      while (!had_err &&
             (status = gt_match_iterator_next(mp, &match, err)) !=
             GT_MATCHER_STATUS_END)
      {
        if (status == GT_MATCHER_STATUS_OK) {
          GtUword hit_seq_id;
          char string[7];
          const char *dbseqid = gt_match_get_seqid2(match);
          if (sscanf(dbseqid,"%6s" GT_WU, string, &hit_seq_id) == 2) {
            gt_match_get_range_seq2(match, hits[curr_hits].range);
            hits[curr_hits].idx = hit_seq_id;
            gt_match_delete(match);
            curr_hits++;
            if (curr_hits == max_hits) {
              HitPosition *hit_extention;
              max_hits += 100;
              hits = gt_realloc(hits, sizeof (*hit_extention) * max_hits);
              for (i=max_hits - 100; i < max_hits; i++) {
                hits[i].range = gt_malloc(sizeof (*hits[i].range));
              }
            }
          } else {
            gt_error_set(err, "could not parse unique db header %s", dbseqid);
            had_err = -1;
          }
        } else if (status == GT_MATCHER_STATUS_ERROR) {
          had_err = -1;
        }
      }
      gt_match_iterator_delete(mp);
    }
    /*extract sequences*/
    if (!had_err) {
      GtNREncseqDecompressor *decomp;
      GtFile *coarse_hits;
      if (timer != NULL)
        gt_timer_show_progress(timer, "extract coarse search hits", stderr);
      decomp = gt_n_r_encseq_decompressor_new(nrencseq);
      coarse_hits = gt_file_new(gt_str_get(coarse_fname),"w", err);
      /* TODO DW do NOT extract complete uniques! these could be complete
         chromosomes!! just extract something around it? maybe +- max query
         length*/
      for (i = 0; i < curr_hits; i++) {
        gt_n_r_encseq_decompressor_add_unique_idx_to_extract(decomp,
                                                             hits[i].idx);
      }
      had_err =
        gt_n_r_encseq_decompressor_start_unique_extraction(coarse_hits,
                                                           decomp,
                                                           &coarse_db_len,
                                                           err);
      gt_assert(coarse_db_len != 0);
      gt_file_delete(coarse_hits);
      gt_n_r_encseq_decompressor_delete(decomp);
    }
    gt_n_r_encseq_delete(nrencseq);

    /* create BLAST database from decompressed database file */
    if (!had_err) {
      if (timer != NULL)
        gt_timer_show_progress(timer, "create fine BLAST db", stderr);
      if (arguments->blastn)
        had_err =
          gt_condenser_search_create_nucl_blastdb(gt_str_get(coarse_fname),
                                                  err);
      else
        had_err =
          gt_condenser_search_create_prot_blastdb(gt_str_get(coarse_fname),
                                                  err);
    }
    /* perform fine BLAST search */
    if (!had_err) {
      GtBlastProcessCall *call;

      if (timer != NULL)
        gt_timer_show_progress(timer, "fine BLAST run", stderr);

      if (arguments->feval == GT_UNDEF_DOUBLE) {
        eval = raw_eval * coarse_db_len;
      } else {
        eval = arguments->feval;
      }

      if (arguments->blastp)
        call = gt_blast_process_call_new_prot();
      else
        call = gt_blast_process_call_new_nucl();

      gt_blast_process_call_set_db(call, gt_str_get(coarse_fname));
      gt_blast_process_call_set_query(call, querypath);
      gt_blast_process_call_set_evalue(call, eval);
      gt_blast_process_call_set_num_threads(call, arguments->blthreads);

      gt_logger_log(logger, "Fine E-value set to: %.4e (len)" GT_WU, eval,
                    coarse_db_len);

      mp = gt_match_iterator_blast_process_new(call, err);
      if (!mp)
        had_err = -1;

      gt_blast_process_call_delete(call);

      if (!had_err) {
        GtUword numofhits = 0;
        while (!had_err &&
               (status = gt_match_iterator_next(mp, &match, err)) !=
               GT_MATCHER_STATUS_END) {
          if (status == GT_MATCHER_STATUS_OK) {
            GtMatchBlast *matchb = (GtMatchBlast*) match;
            char *dbseqid = gt_malloc(sizeof (*dbseqid) * 50);
            GtRange range_seq1;
            GtRange range_seq2;
            numofhits++;
            gt_match_get_range_seq1(match, &range_seq1);
            gt_match_get_range_seq2(match, &range_seq2);
            gt_file_xprintf(
                    arguments->outfp,
                    "%s\t%s\t%.2f\t" GT_WU "\t" GT_WU "\t" GT_WU "\t" GT_WU "\t"
                    GT_WU "\t%g\t%.3f\n",
                    gt_match_get_seqid1(match),
                    gt_match_get_seqid2(match),
                    gt_match_blast_get_similarity(matchb),
                    gt_match_blast_get_align_length(matchb),
                    range_seq1.start,
                    range_seq1.end,
                    range_seq2.start,
                    range_seq2.end,
                    gt_match_blast_get_evalue(matchb),
                    (double) gt_match_blast_get_bitscore(matchb));
            gt_match_delete(match);
            gt_free(dbseqid);
          } else if (status == GT_MATCHER_STATUS_ERROR) {
            had_err = -1;
          }
        }
        gt_log_log(GT_WU " hits found\n", numofhits);
      }
      gt_match_iterator_delete(mp);

    }
    if (!had_err)
      if (timer != NULL)
        gt_timer_show_progress_final(timer, stderr);
    gt_timer_delete(timer);

    /*cleanup*/
    for (i=0; i < max_hits; i++) {
      gt_free(hits[i].range);
    }
    gt_free(hits);
    gt_str_delete(fastaname);
  }
  gt_str_delete(coarse_fname);
  gt_logger_delete(logger);
  return had_err;
}
Пример #9
0
static int gt_select_runner(int argc, const char **argv, int parsed_args,
                            void *tool_arguments, GtError *err)
{
  SelectArguments *arguments = tool_arguments;
  GtNodeStream *gff3_in_stream, *select_stream,
               *targetbest_select_stream = NULL, *gff3_out_stream;
  int had_err;
  GtFile *drop_file = NULL;
  GtNodeVisitor *gff3outvis = NULL;
  gt_error_check(err);
  gt_assert(arguments);

  /* create a gff3 input stream */
  gff3_in_stream = gt_gff3_in_stream_new_unsorted(argc - parsed_args,
                                                  argv + parsed_args);
  if (arguments->verbose && arguments->outfp)
    gt_gff3_in_stream_show_progress_bar((GtGFF3InStream*) gff3_in_stream);

  /* create a filter stream */
  select_stream = gt_select_stream_new(gff3_in_stream, arguments->seqid,
                                       arguments->source,
                                       &arguments->contain_range,
                                       &arguments->overlap_range,
                                       arguments->strand,
                                       arguments->targetstrand,
                                       arguments->has_CDS,
                                       arguments->max_gene_length,
                                       arguments->max_gene_num,
                                       arguments->min_gene_score,
                                       arguments->max_gene_score,
                                       arguments->min_average_splice_site_prob,
                                       arguments->feature_num,
                                       arguments->filter_files,
                                       arguments->filter_logic,
                                       err);

  if (select_stream) {
    GtSelectStream *fs = (GtSelectStream*) select_stream;

    if (gt_str_length(arguments->dropped_file) > 0) {
      drop_file = gt_file_new(gt_str_get(arguments->dropped_file), "w", err);
      gff3outvis = gt_gff3_visitor_new(drop_file);
      gt_select_stream_set_drophandler(fs, print_to_file_drophandler,
                                       (void*) gff3outvis);
    } else {
      gt_select_stream_set_drophandler(fs, default_drophandler, NULL);
    }

    gt_select_stream_set_single_intron_factor(select_stream,
                                              arguments->single_intron_factor);

    if (arguments->targetbest)
      targetbest_select_stream = gt_targetbest_select_stream_new(select_stream);

    /* create a gff3 output stream */
    gff3_out_stream = gt_gff3_out_stream_new(arguments->targetbest
                                             ? targetbest_select_stream
                                             : select_stream,
                                             arguments->outfp);

    /* pull the features through the stream and free them afterwards */
    had_err = gt_node_stream_pull(gff3_out_stream, err);

    /* free */
    gt_node_stream_delete(gff3_out_stream);
    gt_node_stream_delete(select_stream);
    gt_node_stream_delete(targetbest_select_stream);
  } else {
    had_err = -1;
  }
  gt_file_delete(drop_file);
  gt_node_visitor_delete(gff3outvis);
  gt_node_stream_delete(gff3_in_stream);
  return had_err;
}