mirror of
https://github.com/octoleo/syncthing.git
synced 2024-11-19 19:45:12 +00:00
28 lines
636 B
Go
28 lines
636 B
Go
// Copyright (c) 2014 The mathutil Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package mathutil
|
|
|
|
// QCmpUint32 compares a/b and c/d and returns:
|
|
//
|
|
// -1 if a/b < c/d
|
|
// 0 if a/b == c/d
|
|
// +1 if a/b > c/d
|
|
//
|
|
func QCmpUint32(a, b, c, d uint32) int {
|
|
switch x, y := uint64(a)*uint64(d), uint64(b)*uint64(c); {
|
|
case x < y:
|
|
return -1
|
|
case x == y:
|
|
return 0
|
|
default: // x > y
|
|
return 1
|
|
}
|
|
}
|
|
|
|
// QScaleUint32 returns a such that a/b >= c/d.
|
|
func QScaleUint32(b, c, d uint32) (a uint64) {
|
|
return 1 + (uint64(b)*uint64(c))/uint64(d)
|
|
}
|