@thi.ng/buffers/lifo.js

General purpose and generic read/write buffer implementations with different behaviors/orderings

import { assert } from "@thi.ng/errors/assert";
const lifo = (cap) => new LIFOBuffer(cap);
class LIFOBuffer {
  constructor(cap = 1) {
    this.cap = cap;
    assert(cap >= 1, `capacity must be >= 1`);
  }
  buf = [];
  get length() {
    return this.buf.length;
  }
  clear() {
    this.buf.length = 0;
  }
  copy() {
    const buf = new LIFOBuffer(this.buf.length);
    buf.buf = this.buf.slice();
    return buf;
  }
  readable() {
    return this.buf.length > 0;
  }
  read() {
    return this.buf.pop();
  }
  peek() {
    return this.buf[this.buf.length - 1];
  }
  writable() {
    return this.buf.length < this.cap;
  }
  write(x) {
    this.buf.push(x);
    return true;
  }
}
export {
  LIFOBuffer,
  lifo
};