mirror of
https://github.com/cachix/install-nix-action.git
synced 2024-11-22 16:40:51 +00:00
332 lines
9 KiB
JavaScript
332 lines
9 KiB
JavaScript
"use strict";
|
|
|
|
function _(message, opts) {
|
|
return `${opts && opts.context ? opts.context : "Value"} ${message}.`;
|
|
}
|
|
|
|
function type(V) {
|
|
if (V === null) {
|
|
return "Null";
|
|
}
|
|
switch (typeof V) {
|
|
case "undefined":
|
|
return "Undefined";
|
|
case "boolean":
|
|
return "Boolean";
|
|
case "number":
|
|
return "Number";
|
|
case "string":
|
|
return "String";
|
|
case "symbol":
|
|
return "Symbol";
|
|
case "object":
|
|
// Falls through
|
|
case "function":
|
|
// Falls through
|
|
default:
|
|
// Per ES spec, typeof returns an implemention-defined value that is not any of the existing ones for
|
|
// uncallable non-standard exotic objects. Yet Type() which the Web IDL spec depends on returns Object for
|
|
// such cases. So treat the default case as an object.
|
|
return "Object";
|
|
}
|
|
}
|
|
|
|
// Round x to the nearest integer, choosing the even integer if it lies halfway between two.
|
|
function evenRound(x) {
|
|
// There are four cases for numbers with fractional part being .5:
|
|
//
|
|
// case | x | floor(x) | round(x) | expected | x <> 0 | x % 1 | x & 1 | example
|
|
// 1 | 2n + 0.5 | 2n | 2n + 1 | 2n | > | 0.5 | 0 | 0.5 -> 0
|
|
// 2 | 2n + 1.5 | 2n + 1 | 2n + 2 | 2n + 2 | > | 0.5 | 1 | 1.5 -> 2
|
|
// 3 | -2n - 0.5 | -2n - 1 | -2n | -2n | < | -0.5 | 0 | -0.5 -> 0
|
|
// 4 | -2n - 1.5 | -2n - 2 | -2n - 1 | -2n - 2 | < | -0.5 | 1 | -1.5 -> -2
|
|
// (where n is a non-negative integer)
|
|
//
|
|
// Branch here for cases 1 and 4
|
|
if ((x > 0 && (x % 1) === +0.5 && (x & 1) === 0) ||
|
|
(x < 0 && (x % 1) === -0.5 && (x & 1) === 1)) {
|
|
return censorNegativeZero(Math.floor(x));
|
|
}
|
|
|
|
return censorNegativeZero(Math.round(x));
|
|
}
|
|
|
|
function integerPart(n) {
|
|
return censorNegativeZero(Math.trunc(n));
|
|
}
|
|
|
|
function sign(x) {
|
|
return x < 0 ? -1 : 1;
|
|
}
|
|
|
|
function modulo(x, y) {
|
|
// https://tc39.github.io/ecma262/#eqn-modulo
|
|
// Note that http://stackoverflow.com/a/4467559/3191 does NOT work for large modulos
|
|
const signMightNotMatch = x % y;
|
|
if (sign(y) !== sign(signMightNotMatch)) {
|
|
return signMightNotMatch + y;
|
|
}
|
|
return signMightNotMatch;
|
|
}
|
|
|
|
function censorNegativeZero(x) {
|
|
return x === 0 ? 0 : x;
|
|
}
|
|
|
|
function createIntegerConversion(bitLength, typeOpts) {
|
|
const isSigned = !typeOpts.unsigned;
|
|
|
|
let lowerBound;
|
|
let upperBound;
|
|
if (bitLength === 64) {
|
|
upperBound = Math.pow(2, 53) - 1;
|
|
lowerBound = !isSigned ? 0 : -Math.pow(2, 53) + 1;
|
|
} else if (!isSigned) {
|
|
lowerBound = 0;
|
|
upperBound = Math.pow(2, bitLength) - 1;
|
|
} else {
|
|
lowerBound = -Math.pow(2, bitLength - 1);
|
|
upperBound = Math.pow(2, bitLength - 1) - 1;
|
|
}
|
|
|
|
const twoToTheBitLength = Math.pow(2, bitLength);
|
|
const twoToOneLessThanTheBitLength = Math.pow(2, bitLength - 1);
|
|
|
|
return (V, opts) => {
|
|
if (opts === undefined) {
|
|
opts = {};
|
|
}
|
|
|
|
let x = +V;
|
|
x = censorNegativeZero(x); // Spec discussion ongoing: https://github.com/heycam/webidl/issues/306
|
|
|
|
if (opts.enforceRange) {
|
|
if (!Number.isFinite(x)) {
|
|
throw new TypeError(_("is not a finite number", opts));
|
|
}
|
|
|
|
x = integerPart(x);
|
|
|
|
if (x < lowerBound || x > upperBound) {
|
|
throw new TypeError(_(
|
|
`is outside the accepted range of ${lowerBound} to ${upperBound}, inclusive`, opts));
|
|
}
|
|
|
|
return x;
|
|
}
|
|
|
|
if (!Number.isNaN(x) && opts.clamp) {
|
|
x = Math.min(Math.max(x, lowerBound), upperBound);
|
|
x = evenRound(x);
|
|
return x;
|
|
}
|
|
|
|
if (!Number.isFinite(x) || x === 0) {
|
|
return 0;
|
|
}
|
|
x = integerPart(x);
|
|
|
|
// Math.pow(2, 64) is not accurately representable in JavaScript, so try to avoid these per-spec operations if
|
|
// possible. Hopefully it's an optimization for the non-64-bitLength cases too.
|
|
if (x >= lowerBound && x <= upperBound) {
|
|
return x;
|
|
}
|
|
|
|
// These will not work great for bitLength of 64, but oh well. See the README for more details.
|
|
x = modulo(x, twoToTheBitLength);
|
|
if (isSigned && x >= twoToOneLessThanTheBitLength) {
|
|
return x - twoToTheBitLength;
|
|
}
|
|
return x;
|
|
};
|
|
}
|
|
|
|
exports.any = V => {
|
|
return V;
|
|
};
|
|
|
|
exports.void = function () {
|
|
return undefined;
|
|
};
|
|
|
|
exports.boolean = function (val) {
|
|
return !!val;
|
|
};
|
|
|
|
exports.byte = createIntegerConversion(8, { unsigned: false });
|
|
exports.octet = createIntegerConversion(8, { unsigned: true });
|
|
|
|
exports.short = createIntegerConversion(16, { unsigned: false });
|
|
exports["unsigned short"] = createIntegerConversion(16, { unsigned: true });
|
|
|
|
exports.long = createIntegerConversion(32, { unsigned: false });
|
|
exports["unsigned long"] = createIntegerConversion(32, { unsigned: true });
|
|
|
|
exports["long long"] = createIntegerConversion(64, { unsigned: false });
|
|
exports["unsigned long long"] = createIntegerConversion(64, { unsigned: true });
|
|
|
|
exports.double = (V, opts) => {
|
|
const x = +V;
|
|
|
|
if (!Number.isFinite(x)) {
|
|
throw new TypeError(_("is not a finite floating-point value", opts));
|
|
}
|
|
|
|
return x;
|
|
};
|
|
|
|
exports["unrestricted double"] = V => {
|
|
const x = +V;
|
|
|
|
return x;
|
|
};
|
|
|
|
exports.float = (V, opts) => {
|
|
const x = +V;
|
|
|
|
if (!Number.isFinite(x)) {
|
|
throw new TypeError(_("is not a finite floating-point value", opts));
|
|
}
|
|
|
|
if (Object.is(x, -0)) {
|
|
return x;
|
|
}
|
|
|
|
const y = Math.fround(x);
|
|
|
|
if (!Number.isFinite(y)) {
|
|
throw new TypeError(_("is outside the range of a single-precision floating-point value", opts));
|
|
}
|
|
|
|
return y;
|
|
};
|
|
|
|
exports["unrestricted float"] = V => {
|
|
const x = +V;
|
|
|
|
if (isNaN(x)) {
|
|
return x;
|
|
}
|
|
|
|
if (Object.is(x, -0)) {
|
|
return x;
|
|
}
|
|
|
|
return Math.fround(x);
|
|
};
|
|
|
|
exports.DOMString = function (V, opts) {
|
|
if (opts === undefined) {
|
|
opts = {};
|
|
}
|
|
|
|
if (opts.treatNullAsEmptyString && V === null) {
|
|
return "";
|
|
}
|
|
|
|
if (typeof V === "symbol") {
|
|
throw new TypeError(_("is a symbol, which cannot be converted to a string", opts));
|
|
}
|
|
|
|
return String(V);
|
|
};
|
|
|
|
exports.ByteString = (V, opts) => {
|
|
const x = exports.DOMString(V, opts);
|
|
let c;
|
|
for (let i = 0; (c = x.codePointAt(i)) !== undefined; ++i) {
|
|
if (c > 255) {
|
|
throw new TypeError(_("is not a valid ByteString", opts));
|
|
}
|
|
}
|
|
|
|
return x;
|
|
};
|
|
|
|
exports.USVString = (V, opts) => {
|
|
const S = exports.DOMString(V, opts);
|
|
const n = S.length;
|
|
const U = [];
|
|
for (let i = 0; i < n; ++i) {
|
|
const c = S.charCodeAt(i);
|
|
if (c < 0xD800 || c > 0xDFFF) {
|
|
U.push(String.fromCodePoint(c));
|
|
} else if (0xDC00 <= c && c <= 0xDFFF) {
|
|
U.push(String.fromCodePoint(0xFFFD));
|
|
} else if (i === n - 1) {
|
|
U.push(String.fromCodePoint(0xFFFD));
|
|
} else {
|
|
const d = S.charCodeAt(i + 1);
|
|
if (0xDC00 <= d && d <= 0xDFFF) {
|
|
const a = c & 0x3FF;
|
|
const b = d & 0x3FF;
|
|
U.push(String.fromCodePoint((2 << 15) + ((2 << 9) * a) + b));
|
|
++i;
|
|
} else {
|
|
U.push(String.fromCodePoint(0xFFFD));
|
|
}
|
|
}
|
|
}
|
|
|
|
return U.join("");
|
|
};
|
|
|
|
exports.object = (V, opts) => {
|
|
if (type(V) !== "Object") {
|
|
throw new TypeError(_("is not an object", opts));
|
|
}
|
|
|
|
return V;
|
|
};
|
|
|
|
// Not exported, but used in Function and VoidFunction.
|
|
|
|
// Neither Function nor VoidFunction is defined with [TreatNonObjectAsNull], so
|
|
// handling for that is omitted.
|
|
function convertCallbackFunction(V, opts) {
|
|
if (typeof V !== "function") {
|
|
throw new TypeError(_("is not a function", opts));
|
|
}
|
|
return V;
|
|
}
|
|
|
|
[
|
|
Error,
|
|
ArrayBuffer, // The IsDetachedBuffer abstract operation is not exposed in JS
|
|
DataView, Int8Array, Int16Array, Int32Array, Uint8Array,
|
|
Uint16Array, Uint32Array, Uint8ClampedArray, Float32Array, Float64Array
|
|
].forEach(func => {
|
|
const name = func.name;
|
|
const article = /^[AEIOU]/.test(name) ? "an" : "a";
|
|
exports[name] = (V, opts) => {
|
|
if (!(V instanceof func)) {
|
|
throw new TypeError(_(`is not ${article} ${name} object`, opts));
|
|
}
|
|
|
|
return V;
|
|
};
|
|
});
|
|
|
|
// Common definitions
|
|
|
|
exports.ArrayBufferView = (V, opts) => {
|
|
if (!ArrayBuffer.isView(V)) {
|
|
throw new TypeError(_("is not a view on an ArrayBuffer object", opts));
|
|
}
|
|
|
|
return V;
|
|
};
|
|
|
|
exports.BufferSource = (V, opts) => {
|
|
if (!(ArrayBuffer.isView(V) || V instanceof ArrayBuffer)) {
|
|
throw new TypeError(_("is not an ArrayBuffer object or a view on one", opts));
|
|
}
|
|
|
|
return V;
|
|
};
|
|
|
|
exports.DOMTimeStamp = exports["unsigned long long"];
|
|
|
|
exports.Function = convertCallbackFunction;
|
|
|
|
exports.VoidFunction = convertCallbackFunction;
|