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Range.hxx
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1996-05-31
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#ifndef RANGE_HXX
#define RANGE_HXX
/* Range.h -- header file for class Range
THIS SOFTWARE FITS THE DESCRIPTION IN THE U.S. COPYRIGHT ACT OF A
"UNITED STATES GOVERNMENT WORK". IT WAS WRITTEN AS A PART OF THE
AUTHOR'S OFFICIAL DUTIES AS A GOVERNMENT EMPLOYEE. THIS MEANS IT
CANNOT BE COPYRIGHTED. THIS SOFTWARE IS FREELY AVAILABLE TO THE
PUBLIC FOR USE WITHOUT A COPYRIGHT NOTICE, AND THERE ARE NO
RESTRICTIONS ON ITS USE, NOW OR SUBSEQUENTLY.
Author:
C. J. Eppich
Computer Systems Laboratory, DCRT
National Institutes of Health
Bethesda, MD 20892
$Log: Range.h,v $
* Revision 3.0 90/05/20 00:20:57 kgorlen
* Release for 1st edition.
*
* @(#)Range.hxx 1.1
*
*/
class ostream;
class Range {
public: // constructors
Range() : first(0), len(-1) {}
Range(int f, int l) : first(f), len(l) {}
public: // operators
void operator=(const Range& r) { first = r.first; len = r.len; }
int operator==(const Range& r) const { return ((first == r.first) && (len == r.len)); }
int operator!=(const Range& r) const { return !(*this==r); }
public: // functions
int firstIndex() const { return first; }
int firstIndex(int f) { return first = f; }
int lastIndex() const { return (first + len - 1); }
int lastIndex(int i) { len = i - first + 1; return i; }
int length() const { return len; }
int length(int l) { return len = l; }
int valid() const { return (len >= 0); }
void printOn(ostream& strm) const;
private: // data
int first,len;
};
extern ostream& operator<< (ostream& strm, const Range& r);
#endif