source: trunk/yat/utility/VectorMutable.cc @ 1151

// $Id: VectorMutable.cc 1151 2008-02-25 22:32:04Z peter $

/*
  Copyright (C) 2003 Daniel Dalevi, Peter Johansson
  Copyright (C) 2004 Jari Häkkinen, Peter Johansson
  Copyright (C) 2005, 2006 Jari Häkkinen, Markus Ringnér, Peter Johansson
  Copyright (C) 2007 Jari Häkkinen, Peter Johansson

  This file is part of the yat library, http://trac.thep.lu.se/trac/yat

  The yat library 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 2 of the
  License, or (at your option) any later version.

  The yat library 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, write to the Free Software
  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  02111-1307, USA.
*/

#include "VectorMutable.h"
#include "utility.h"
#include "yat/random/random.h"

#include <algorithm>
#include <cassert>
#include <cmath>
#include <iostream>
#include <sstream>
#include <utility>
#include <vector>

namespace theplu {
namespace yat {
namespace utility {


  VectorMutable::VectorMutable(void)
    : VectorBase(NULL), vec_(NULL)
  {
  }


  VectorMutable::VectorMutable(gsl_vector* v)
    : VectorBase(v), vec_(v)
  {
  }


  VectorMutable::VectorMutable(const gsl_vector* v)
    : VectorBase(v), vec_(NULL)
  {
  }


  VectorMutable::~VectorMutable(void)
  {
  }


  void VectorMutable::all(double value)
  {
    assert(vec_);
    gsl_vector_set_all(vec_,value);
  }


  VectorMutable::iterator VectorMutable::begin(void)
  {
    if (vec_)
      return iterator(&(this->operator()(0)), vec_->stride);
    return iterator(NULL, 1);
  }


  void VectorMutable::div(const VectorBase& other)
  {
    assert(vec_);
    int status=gsl_vector_div(vec_,other.gsl_vector_p());
    if (status)
      throw utility::GSL_error(std::string("VectorMutable::div",status));
  }


  VectorMutable::iterator VectorMutable::end(void)
  {
    if (vec_)
      return iterator(&(this->operator()(0))+vec_->stride*size(), 
                            const_vec_->stride);
    return iterator(NULL, 1);
  }


  gsl_vector* VectorMutable::gsl_vector_p(void)
  {
    return vec_;
  }


  void VectorMutable::mul(const VectorBase& other)
  {
    assert(vec_);
    int status=gsl_vector_mul(vec_,other.gsl_vector_p());
    if (status)
      throw utility::GSL_error(std::string("VectorMutable::div",status));
  }


  double& VectorMutable::operator()(size_t i)
  {
    double* d=gsl_vector_ptr(vec_, i);
    if (!d)
      throw utility::GSL_error("VectorMutable::operator()",GSL_EINVAL);
    return *d;
  }


  const VectorMutable& VectorMutable::operator+=(double d)
  {
    assert(vec_);
    gsl_vector_add_constant(vec_, d);
    return *this;
  }


  const VectorMutable& VectorMutable::operator-=(const VectorBase& other)
  {
    assert(vec_);
    int status=gsl_vector_sub(vec_, other.gsl_vector_p());
    if (status)
      throw utility::GSL_error(std::string("VectorMutable::sub", status));
    return *this;
  }


  const VectorMutable& VectorMutable::operator-=(const double d)
  {
    assert(vec_);
    gsl_vector_add_constant(vec_, -d);
    return *this;
  }


  const VectorMutable& VectorMutable::operator*=(double d)
  {
    assert(vec_);
    gsl_vector_scale(vec_, d);
    return *this;
  }


  void shuffle(VectorMutable& invec)
  {
    random::random_shuffle(invec.begin(), invec.end());
  }


  void sort(VectorMutable& invec)
  {
    std::sort(invec.begin(), invec.end());
  }


  VectorMutable::operator proxy()
  {
    assert(vec_==const_vec_);
    proxy p;
    p.vec_ = vec_;
    vec_ = NULL; // proxy takes ownership and delivers to its receiver
    const_vec_ = NULL;
    return p;
  }

}}} // of namespace utility, yat, and thep