diff options
Diffstat (limited to 'pkg/segment/range.go')
-rw-r--r-- | pkg/segment/range.go | 79 |
1 files changed, 0 insertions, 79 deletions
diff --git a/pkg/segment/range.go b/pkg/segment/range.go deleted file mode 100644 index 4d4aeffef..000000000 --- a/pkg/segment/range.go +++ /dev/null @@ -1,79 +0,0 @@ -// Copyright 2018 The gVisor Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -package segment - -// T is a required type parameter that must be an integral type. -type T uint64 - -// A Range represents a contiguous range of T. -// -// +stateify savable -type Range struct { - // Start is the inclusive start of the range. - Start T - - // End is the exclusive end of the range. - End T -} - -// WellFormed returns true if r.Start <= r.End. All other methods on a Range -// require that the Range is well-formed. -func (r Range) WellFormed() bool { - return r.Start <= r.End -} - -// Length returns the length of the range. -func (r Range) Length() T { - return r.End - r.Start -} - -// Contains returns true if r contains x. -func (r Range) Contains(x T) bool { - return r.Start <= x && x < r.End -} - -// Overlaps returns true if r and r2 overlap. -func (r Range) Overlaps(r2 Range) bool { - return r.Start < r2.End && r2.Start < r.End -} - -// IsSupersetOf returns true if r is a superset of r2; that is, the range r2 is -// contained within r. -func (r Range) IsSupersetOf(r2 Range) bool { - return r.Start <= r2.Start && r.End >= r2.End -} - -// Intersect returns a range consisting of the intersection between r and r2. -// If r and r2 do not overlap, Intersect returns a range with unspecified -// bounds, but for which Length() == 0. -func (r Range) Intersect(r2 Range) Range { - if r.Start < r2.Start { - r.Start = r2.Start - } - if r.End > r2.End { - r.End = r2.End - } - if r.End < r.Start { - r.End = r.Start - } - return r -} - -// CanSplitAt returns true if it is legal to split a segment spanning the range -// r at x; that is, splitting at x would produce two ranges, both of which have -// non-zero length. -func (r Range) CanSplitAt(x T) bool { - return r.Contains(x) && r.Start < x -} |