# Hurricane VLSI Database

List of all members | Public Member Functions
Hurricane::Interval Class Reference

Interval description (API) More...

## Public Member Functions
| Interval (bool makeEmpty=true)
| Interval (const DbU::Unit &)
| Interval (const DbU::Unit &v1, const DbU::Unit &v2)
| Interval (const Interval &)
Interval & | operator= (const Interval &)
bool | operator== (const Interval &) const
bool | operator!= (const Interval &) const
const DbU::Unit & | getVMin () const
const DbU::Unit & | getVMax () const
DbU::Unit | getCenter () const
DbU::Unit | getSize () const
DbU::Unit | getHalfSize () const
Interval | getUnion (const Interval &) const
Interval | getIntersection (const Interval &) const
bool | isEmpty () const
bool | isPonctual () const
bool | contains (const DbU::Unit &) const
bool | contains (const Interval &) const
bool | intersect (const Interval &, bool strict=false) const
Interval & | makeEmpty ()
Interval & | inflate (const DbU::Unit &dv)
Interval & | inflate (const DbU::Unit &dvMin, const DbU::Unit &dvMax)
Interval & | merge (const DbU::Unit &)
Interval & | merge (const Interval &)
Interval & | intersection (const DbU::Unit &vMin, const DbU::Unit &vMax)
Interval & | intersection (const Interval &)
Interval & | translate (const DbU::Unit &)

## Detailed Description

Interval description (API)

# Introduction

Those objects represent intervals. They are defined by the values VMin and VMax which are representatives only when the interval is not empty. An interval is considered empty whenever it is not initialized or when it doesn't represent a real interval like the intersection of two disjoint intervals.

# Remark

All the function described in the chapter above return a reference on the modified interval, providing so the capability to apply to it a new modification.

## Constructor & Destructor Documentation

## ◆ Interval() [1/4]

Hurricane::Interval::Interval | ( | bool | makeEmpty = `true` | ) |

Default constructor : the returned interval is empty if makeEmpy is set to true (default) or full span otherwise.

## ◆ Interval() [2/4]

Hurricane::Interval::Interval | ( | const DbU::Unit & | v | ) |

Builds an interval of null size centered on the value defined by `<v>`.

## ◆ Interval() [3/4]

Hurricane::Interval::Interval | ( | const DbU::Unit & | v1,
|  | const DbU::Unit & | v2
| ) |  |

Builds the minimal interval enclosing the two values defined by `<v1>` and `<v2>`.

## ◆ Interval() [4/4]

Hurricane::Interval::Interval | ( | const Interval & | interval | ) |

Copy constructor.

## Member Function Documentation

## ◆ operator=()

Interval & Hurricane::Interval::operator= | ( | const Interval & | interval | ) |

Assignment operator.

## ◆ operator==()

bool Hurricane::Interval::operator== | ( | const Interval & | interval | ) | const

Equality operator.

Remarks
  Two empty intervals are always different.

## ◆ operator!=()

bool Hurricane::Interval::operator!= | ( | const Interval & | interval | ) | const

Difference operator.

## ◆ getVMin()

const DbU::Unit & Hurricane::Interval::getVMin | ( |  | ) | const
| inline

Returns: the VMin value : meaningful only for a non empty interval.

## ◆ getVMax()

const DbU::Unit & Hurricane::Interval::getVMax | ( |  | ) | const
| inline

Returns: the VMax value : meaningful only for a non empty interval.

## ◆ getCenter()

DbU::Unit Hurricane::Interval::getCenter | ( |  | ) | const
| inline

Returns: the interval center value : meaningful only for a non empty interval.

## ◆ getSize()

DbU::Unit Hurricane::Interval::getSize | ( |  | ) | const
| inline

Returns: the interval size : meaningful only for a non empty interval.

References isEmpty().

Referenced by getHalfSize().

## ◆ getHalfSize()

DbU::Unit Hurricane::Interval::getHalfSize | ( |  | ) | const
| inline

Returns: the half interval width : meaningful only for a non empty interval.

References getSize().

## ◆ getUnion()

Interval Hurricane::Interval::getUnion | ( | const Interval & | interval | ) | const

Returns: the smallest enclosing interval containing the intervals `<this>` and `<interval>`. The returned interval may be empty if both are.

## ◆ getIntersection()

Interval Hurricane::Interval::getIntersection | ( | const Interval & | interval | ) | const

Returns: interval representing the overlapping region. This interval is empty if either one of the two intervals is empty or if they are disjoint.

## ◆ isEmpty()

bool Hurricane::Interval::isEmpty | ( |  | ) | const
| inline

Returns: true if the interval is empty, else false.

Referenced by getSize().

## ◆ isPonctual()

bool Hurricane::Interval::isPonctual | ( |  | ) | const
| inline

Returns: true if the interval is reduced to a value, else false.

## ◆ contains() [1/2]

bool Hurricane::Interval::contains | ( | const DbU::Unit & | v | ) | const

Returns: true if the interval is non empty and contains the value defined by `<v>` else false.

## ◆ contains() [2/2]

bool Hurricane::Interval::contains | ( | const Interval & | interval | ) | const

Returns: true if the two intervals are non empty and if the interval `<this>` contains the interval `<interval>`, else false.

## ◆ intersect()

bool Hurricane::Interval::intersect | ( | const Interval & | ,
|  | bool | strict = `false`
| ) |  | const

Returns: true if the two intervals are non empty and if they overlap, else false.

## ◆ makeEmpty()

Interval & Hurricane::Interval::makeEmpty | ( |  | ) |

Transforms the interval into an empty one.

## ◆ inflate() [1/2]

Interval & Hurricane::Interval::inflate | ( | const DbU::Unit & | dv | ) |

Expands (or contracts) the interval, if not empty, in each direction of the quantity `<dv>`. This quantity might be negative enough to transform it into an empty interval.

## ◆ inflate() [2/2]

Interval & Hurricane::Interval::inflate | ( | const DbU::Unit & | dvMin,
|  | const DbU::Unit & | dvMax
| ) |  |

Expands (or contracts) the interval, if not empty, on the left of the quantity `<dvMin>` and on the right of the quantity `<dvMax>`. Those quantities might be negative enough to transform it into an empty interval.

## ◆ merge() [1/2]

Interval & Hurricane::Interval::merge | ( | const DbU::Unit & | v | ) |

Expands the interval in order that it encloses the value defined `<v>`. If the interval was initially empty it becomes reduced to the enclosed value.

## ◆ merge() [2/2]

Interval & Hurricane::Interval::merge | ( | const Interval & | interval | ) |

Expands the interval in order that it encloses, if not empty, the interval `<interval>`. If the interval `<this>` was initially empty it becomes reduced to the enclosed interval.

## ◆ intersection() [1/2]

Interval & Hurricane::Interval::intersection | ( | const DbU::Unit & | vMin,
|  | const DbU::Unit & | vMax
| ) |  |

The interval becomes the intersection of itself and [vMin,vMax].

## ◆ intersection() [2/2]

Interval & Hurricane::Interval::intersection | ( | const Interval & | interval | ) |

The interval becomes the intersection of itself and interval.

## ◆ translate()

Interval & Hurricane::Interval::translate | ( | const DbU::Unit & | dv | ) |

translates the interval, if not empty, of the quantity `<dv>`.

Exemple :

Interval interval1 = Interval(10, 100);
Interval interval2 = interval1;
assert(interval1.translate(10) == interval2.inflate(-10, 10));

The documentation for this class was generated from the following files:

- Interval.h
- Interval.dox

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