rn.hh

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#ifndef __RVLRN
#define __RVLRN

#include "local.hh"

namespace RVL {

  template<class Scalar>
  class RnArray: public LocalDataContainer<Scalar> {
  private:

    size_t n;
    int own;
    size_t start;
    mutable Scalar * a;

    RnArray() {}

  public:

    RnArray(const RnArray<Scalar> & x)
      : n(x.n), own(1), start(0), a(new Scalar[n]) {
      for (size_t i=0;i<n;i++) {
    a[i]=x.a[i];
      }
    }

    RnArray(size_t _n)
      : n(_n),
    own(1), start(0), a(NULL) {
      if (n<=0) {
    RVLException e;
    e<<"Error: RnArray constructor\n";
    e<<"must have positive dimension = "<<n<<"\n";
    throw e;
      }
    }

    RnArray(LocalDataContainer<Scalar> & rn, size_t len, size_t _start=0)
      : start(_start), n(len), own(0) {
      a = &(rn.getData()[start]);
      if (start+n>rn.getSize()) {
    RVLException e;
    e<<"Error: RnArray \"view\" constructor\n";
    e<<"segment runs off end of input LocalDC\n";
    e<<"length of input LocalDC = "<<rn.getSize()<<"\n";
    e<<"index of segment start  = "<<start<<"\n";
    e<<"length of segment       = "<<n<<"\n";
    throw e;
      }
    }

    ~RnArray() { if (own && a) delete [] a; }

    size_t getSize() const { return n; }

    Scalar * getData() { 
      if (!a) a = new Scalar[n];
      return a; 
    }

    Scalar const * getData() const {
      if (!a) a = new Scalar[n];
      return a;
    }

    void write(RVLException & str) const {
      str<<"RnArray Local Data Container object\n";
      str<<"length = "<<n<<"\n";
      if (a) {
    str<<"samples: \n";
    for (size_t i=0;i<n;i++) {
      str<<"data["<<i<<"] = "<<a[i]<<"\n";
    }
      }
      else {
    str<<"data samples not initialized\n";
      }
    }

    ostream & write(ostream & str) const {
      str<<"RnArray Local Data Container object\n";
      str<<"length = "<<n<<"\n";
      str<<"samples: \n";
      if (a) {
    for (size_t i=0;i<n;i++) {
      str<<"data["<<i<<"] = "<<a[i]<<"\n";
    }
      }
      else {
    str<<"data samples not initialized\n";
      }
      return str;
    }
  };

  template<class Scalar> 
  class RnDataContainerFactory: public LocalDataContainerFactory<Scalar> {

  private:

    size_t n;

  protected:

    void redim(size_t _n) { n = _n; }

  public:

    RnDataContainerFactory(size_t _n=0): n(_n) {}
    RnDataContainerFactory(const RnDataContainerFactory<Scalar> & f): n(f.n) {}
    ~RnDataContainerFactory() {}

    virtual LocalDataContainer<Scalar> * buildLocal() const { 
      try {
    return new RnArray<Scalar>(n);
      }
      catch (RVLException & e) {
    e<<"\ncalled from RnDataContainerFactory::buildLocal()\n";
    throw e;
      }
    }      

    virtual bool compare( DataContainerFactory const & dcf) const {
      try {
    if (&dcf == this) return 1;
    RnDataContainerFactory<Scalar> const & a = 
      dynamic_cast< RnDataContainerFactory<Scalar> const &>(dcf);
    if (n == a.n) return 1;
    return 0;
      }
      catch (bad_cast) {
    return 0;
      }
    }

    virtual bool isCompatible(DataContainer const & dc) const  {
      try {
    RnArray<Scalar> const & a = 
      dynamic_cast<RnArray<Scalar> const &>(dc);
    if (n == a.getSize()) return 1;
    return 0;
      }
      catch (bad_cast) {
    return 0;
      }
    }

    size_t getSize() const { return n; }

    virtual void write(RVLException & e) const {
      e<<"RnDataContainerFactory, dimn = "<<n<<"\n";
    }
    virtual ostream & write(ostream & str) const {
      str<<"RnDataContainerFactory, dimn = "<<n<<"\n";
      return str;
    }

  };

}

#endif

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