@tonaljs/time-signature/dist/index.js

Musical time signatures

"use strict";
var __defProp = Object.defineProperty;
var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
var __getOwnPropNames = Object.getOwnPropertyNames;
var __hasOwnProp = Object.prototype.hasOwnProperty;
var __export = (target, all) => {
  for (var name in all)
    __defProp(target, name, { get: all[name], enumerable: true });
};
var __copyProps = (to, from, except, desc) => {
  if (from && typeof from === "object" || typeof from === "function") {
    for (let key of __getOwnPropNames(from))
      if (!__hasOwnProp.call(to, key) && key !== except)
        __defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
  }
  return to;
};
var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);

// index.ts
var time_signature_exports = {};
__export(time_signature_exports, {
  default: () => time_signature_default,
  get: () => get,
  names: () => names,
  parse: () => parse
});
module.exports = __toCommonJS(time_signature_exports);
var NONE = {
  empty: true,
  name: "",
  upper: void 0,
  lower: void 0,
  type: void 0,
  additive: []
};
var NAMES = ["4/4", "3/4", "2/4", "2/2", "12/8", "9/8", "6/8", "3/8"];
function names() {
  return NAMES.slice();
}
var REGEX = /^(\d*\d(?:\+\d)*)\/(\d+)$/;
var CACHE = /* @__PURE__ */ new Map();
function get(literal) {
  const stringifiedLiteral = JSON.stringify(literal);
  const cached = CACHE.get(stringifiedLiteral);
  if (cached) {
    return cached;
  }
  const ts = build(parse(literal));
  CACHE.set(stringifiedLiteral, ts);
  return ts;
}
function parse(literal) {
  if (typeof literal === "string") {
    const [_, up2, low] = REGEX.exec(literal) || [];
    return parse([up2, low]);
  }
  const [up, down] = literal;
  const denominator = +down;
  if (typeof up === "number") {
    return [up, denominator];
  }
  const list = up.split("+").map((n) => +n);
  return list.length === 1 ? [list[0], denominator] : [list, denominator];
}
var time_signature_default = { names, parse, get };
var isPowerOfTwo = (x) => Math.log(x) / Math.log(2) % 1 === 0;
function build([up, down]) {
  const upper = Array.isArray(up) ? up.reduce((a, b) => a + b, 0) : up;
  const lower = down;
  if (upper === 0 || lower === 0) {
    return NONE;
  }
  const name = Array.isArray(up) ? `${up.join("+")}/${down}` : `${up}/${down}`;
  const additive = Array.isArray(up) ? up : [];
  const type = lower === 4 || lower === 2 ? "simple" : lower === 8 && upper % 3 === 0 ? "compound" : isPowerOfTwo(lower) ? "irregular" : "irrational";
  return {
    empty: false,
    name,
    type,
    upper,
    lower,
    additive
  };
}
// Annotate the CommonJS export names for ESM import in node:
0 && (module.exports = {
  get,
  names,
  parse
});
//# sourceMappingURL=index.js.map