/home/paulfitz/cvs/coopy_scm/coopy/src/libcoopy_core/include/coopy/OrderResult.h

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#ifndef ORDERRESULT_INC
#define ORDERRESULT_INC

#include <coopy/IntSheet.h>

namespace coopy {
  namespace cmp {
    class OrderResult;
    class IdentityOrderResult;
  }
}

class coopy::cmp::OrderResult {
private:
  coopy::store::IntSheet _a2b, _b2a;
public:
  const coopy::store::IntSheet& allA2b() const { return _a2b; }
  const coopy::store::IntSheet& allB2a() const { return _b2a; }

  void setup(coopy::store::IntSheet& _a2b, 
             coopy::store::IntSheet& _b2a) {
    this->_a2b = _a2b;
    this->_b2a = _b2a;
  }

  virtual int a2b(int x) const {
    if (x==-2) return -2;
    if (x<0||x>=_a2b.height()) { return -1; }
    return _a2b.cell(0,x);
  }

  virtual int b2a(int x) const {
    if (x==-2) return -2;
    if (x<0||x>=_b2a.height()) { return -1; }
    return _b2a.cell(0,x);
  }

  int alen() const { return _a2b.height(); }
  int blen() const { return _b2a.height(); }

  void trimHead(int pre, int post) {
    int ha = _a2b.height();
    int hb = _b2a.height();
    for (int i=0; i<ha; i++) {
      int& x = _a2b.cell(0,i);
      if (x==pre) x = post; else break;
    }
    for (int i=0; i<hb; i++) {
      int& x = _b2a.cell(0,i);
      if (x==pre) x = post; else break;
    }
  }

  void trimTail(int pre, int post) {
    int ha = _a2b.height();
    int hb = _b2a.height();
    for (int i=ha-1; i>=0; i--) {
      int& x = _a2b.cell(0,i);
      if (x==pre) x = post; else break;
    }
    for (int i=hb-1; i>=0; i--) {
      int& x = _b2a.cell(0,i);
      if (x==pre) x = post; else break;
    }
  }

  virtual bool isBlank() const {
    return alen()==0 && blen()==0;
  }
};

class coopy::cmp::IdentityOrderResult : public OrderResult {
public:
  virtual int a2b(int x) const {
    return x;
  }

  virtual int b2a(int x) const {
    return x;
  }

  virtual bool isBlank() const {
    return false;
  }
};

#endif