src/vs/base/common/numbers.ts
121 LOC · 83 covered · 38 uncovered · 21 ranges · 1887 concepts · 8 introducers · 942 tests
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/*---------------------------------------------------------------------------------------------
numbers.ts ×13
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License. See License.txt in the project root for license information.
*--------------------------------------------------------------------------------------------*/
import { assert } from './assert.js';
export function clamp(value: number, min: number, max: number): number {
return Math.min(Math.max(value, min), max);
}
/**
* Formats a token count for compact display (e.g. `128K`, `1M`, `1.5M`).
*/
export function formatTokenCount(count: number): string {
const floored = Math.floor(value * 10) / 10;
return floored % 1 === 0 ? `${floored.toFixed(0)}M` : `${floored.toFixed(1)}M`;
}
}
export function rot(index: number, modulo: number): number {
return (modulo + (index % modulo)) % modulo;
}
export class Counter {
private _next = 0;
getNext(): number {
return this._next++;
}
export class MovingAverage {
private _n = 1;
private _val = 0;
update(value: number): number {
this._val = this._val + (value - this._val) / this._n;
this._n += 1;
return this._val;
}
get value(): number {
return this._val;
}
export class SlidingWindowAverage {
private _n: number = 0;
private _val = 0;
private readonly _values: number[] = [];
private _index: number = 0;
private _sum = 0;
constructor(size: number) {
this._values = new Array(size);
this._values.fill(0, 0, size);
}
update(value: number): number {
const oldValue = this._values[this._index];
this._values[this._index] = value;
this._index = (this._index + 1) % this._values.length;
this._sum -= oldValue;
this._sum += value;
if (this._n < this._values.length) {
this._n += 1;
}
this._val = this._sum / this._n;
return this._val;
}
get value(): number {
return this._val;
}
/** Returns whether the point is within the triangle formed by the following 6 x/y point pairs */
export function isPointWithinTriangle(
ax: number, ay: number,
bx: number, by: number,
cx: number, cy: number
) {
const v0x = cx - ax;
const v0y = cy - ay;
const v1x = bx - ax;
const v1y = by - ay;
const v2x = x - ax;
const v2y = y - ay;
const dot00 = v0x * v0x + v0y * v0y;
const dot01 = v0x * v1x + v0y * v1y;
const dot02 = v0x * v2x + v0y * v2y;
const dot11 = v1x * v1x + v1y * v1y;
const dot12 = v1x * v2x + v1y * v2y;
const invDenom = 1 / (dot00 * dot11 - dot01 * dot01);
const u = (dot11 * dot02 - dot01 * dot12) * invDenom;
const v = (dot00 * dot12 - dot01 * dot02) * invDenom;
return u >= 0 && v >= 0 && u + v < 1;
}
export function randomChance(p: number): boolean {
assert(p >= 0 && p <= 1, 'p must be between 0 and 1');
return Math.random() < p;
}