source: trunk/yat/omic/BamRead.cc @ 2985

// $Id: BamRead.cc 2985 2013-02-18 07:36:14Z peter $
//
// Copyright (C) 2012, 2013 Peter Johansson
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.

#include <config.h>

#include "BamRead.h"
#include "config_bam.h"

#include YAT_BAM_HEADER

#include <algorithm>
#include <cassert>
#include <sstream>

namespace theplu {
namespace yat {
namespace omic {

  BamRead::BamRead(void)
    : bam_(bam_init1())
  {}


  BamRead::BamRead(const BamRead& other)
    : bam_(bam_dup1(other.bam_))
  {
  }


  BamRead::~BamRead(void)
  {
    bam_destroy1(bam_);
  }


  const BamRead& BamRead::operator=(const BamRead& rhs)
  {
    if (bam_!=rhs.bam_)
      bam_copy1(bam_, rhs.bam_);
    return *this;
  }


  const uint8_t* BamRead::aux(void) const
  {
    return bam1_aux(bam_);
  }


  const uint32_t* BamRead::cigar(void) const
  {
    return bam1_cigar(bam_);
  }


  uint32_t BamRead::cigar(size_t i) const
  {
    assert(i<core().n_cigar);
    return bam1_cigar(bam_)[i];
  }


  uint32_t BamRead::cigar_op(size_t i) const
  {
    assert(i<core().n_cigar);
    return bam_cigar_op(cigar(i));
  }


  uint32_t BamRead::cigar_oplen(size_t i) const
  {
    assert(i<core().n_cigar);
    return bam_cigar_oplen(cigar(i));
  }


  std::string BamRead::cigar_str(void) const
  {
    std::ostringstream os;
    std::string str = BAM_CIGAR_STR;
    for (uint32_t i=0; i<core().n_cigar; ++i) {
      os << bam_cigar_oplen(bam1_cigar(bam_)[i])
         << str[bam_cigar_op(bam1_cigar(bam_)[i])];
    }
    return os.str();
  }


  void BamRead::cigar(const std::vector<uint32_t>& c)
  {
    int m_data = bam_->m_data;
    int data_len = bam_->data_len + 4*c.size() - 4*core().n_cigar;
    // double capacity if needed
    if (m_data < data_len) {
      m_data = data_len;
      kroundup32(m_data);
    }
    uint8_t* data = (uint8_t*)calloc(m_data, 1);
    /*
      data comes as qname, cigar, rest
     */
    // first copy qname
    memcpy(data, bam_->data, core().l_qname);
    // copy new cigar
    if (c.size())
      // each cigar element is 4 bytes
      memcpy(data + core().l_qname, &c[0], 4*c.size());
    // copy remaining data
    memcpy(data + core().l_qname + 4*c.size(), bam1_seq(bam_),
           data_len - 4*c.size() - core().l_qname);
    bam_->m_data = m_data;
    bam_->data_len = data_len;
    core().n_cigar = c.size();
    free(bam_->data);
    bam_->data = data;
  }


  const bam1_core_t& BamRead::core(void) const
  { return bam_->core; }


  bam1_core_t& BamRead::core(void)
  { return bam_->core; }


  const char* BamRead::name(void) const
  { return bam1_qname(bam_); }


  uint8_t BamRead::qual(size_t i) const
  { return *(bam1_qual(bam_)+i); }


  std::string BamRead::sequence(void) const
  {
    // FIXME bam_nt16_rev_table not available in old lbam
    std::string result(sequence_length(), ' ');
    for (size_t i=0; i<result.size(); ++i)
      result[i] = bam_nt16_rev_table[sequence(i)];
    return result;
  }


  void BamRead::sequence(size_t i, uint8_t seq)
  {
    assert(bam_);
    assert(seq < 16);
    bam1_seq_seti(bam1_seq(bam_), i, seq);
  }


  uint8_t BamRead::sequence(size_t index) const
  {
    assert(bam_);
    return bam1_seqi(bam1_seq(bam_),index);
  }


  uint32_t BamRead::sequence_length(void) const
  {
    assert(bam_);
    return bam_->core.l_qseq;
  }


  int32_t BamRead::pos(void) const
  {
    assert(bam_);
    return bam_->core.pos;
  }


  int32_t BamRead::tid(void) const
  {
    assert(bam_);
    return bam_->core.tid;
  }



  int32_t BamRead::mpos(void) const
  {
    assert(bam_);
    return bam_->core.mpos;
  }


  int32_t BamRead::end(void) const
  {
    assert(bam_);
    return bam_calend(&core(), bam1_cigar(bam_));
  }


  void BamRead::swap(BamRead& other)
  {
    std::swap(bam_, other.bam_);
  }


  void swap(BamRead& lhs, BamRead& rhs)
  {
    lhs.swap(rhs);
  }

  bool same_query_name(const BamRead& lhs, const BamRead& rhs)
  {
    if (lhs.core().l_qname != rhs.core().l_qname)
      return false;

    return std::equal(lhs.name(),
                      lhs.name() + lhs.core().l_qname,
                      rhs.name());
  }


  bool soft_clipped(const BamRead& bam)
  {
    return left_soft_clipped(bam) || right_soft_clipped(bam);
  }


  uint32_t left_soft_clipped(const BamRead& bam)
  {
    for (size_t i=0; i<bam.core().n_cigar; ++i) {
      if (bam.cigar_op(i) == BAM_CSOFT_CLIP)
        return bam.cigar_oplen(i);
      if (bam_cigar_type(bam.cigar_op(i))&1)
        return 0;
    }
    return 0;
  }


  uint32_t right_soft_clipped(const BamRead& bam)
  {
    if (bam.core().n_cigar==0)
      return 0;
    // right clip can't be at first (most left cigar element)
    for (size_t i=bam.core().n_cigar-1; i>0; --i) {
      if (bam.cigar_op(i) == BAM_CSOFT_CLIP)
        return bam.cigar_oplen(i);
      if (bam_cigar_type(bam.cigar_op(i))&1)
        return 0;
    }
    return 0;
  }


  bool BamLessPos::operator()(const BamRead& lhs, const BamRead& rhs) const
  {
    return lhs.tid() < rhs.tid() ||
      (lhs.tid() == rhs.tid() && lhs.pos() < rhs.pos());
  }


  bool BamLessEnd::operator()(const BamRead& lhs, const BamRead& rhs) const
  {
    return lhs.tid() < rhs.tid() ||
      (lhs.tid() == rhs.tid() && lhs.end() < rhs.end());
  }

}}}