@jspm/core
Version:
This package contains the core libraries used in jspm 2.
777 lines (612 loc) • 193 kB
JavaScript
import { y as y$1 } from './chunk-tHuMsdT0.js';
import { X } from './chunk-D3uu3VYh.js';
import { p as process } from './chunk-b0rmRow7.js';
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var e={},n=e$1$1,o=n.Buffer;function t(r,e){for(var n in r)e[n]=r[n];}function f(r,e,n){return o(r,e,n)}o.from&&o.alloc&&o.allocUnsafe&&o.allocUnsafeSlow?e=n:(t(n,e),e.Buffer=f),f.prototype=Object.create(o.prototype),t(o,f),f.from=function(r,e,n){if("number"==typeof r)throw new TypeError("Argument must not be a number");return o(r,e,n)},f.alloc=function(r,e,n){if("number"!=typeof r)throw new TypeError("Argument must be a number");var t=o(r);return void 0!==e?"string"==typeof n?t.fill(e,n):t.fill(e):t.fill(0),t},f.allocUnsafe=function(r){if("number"!=typeof r)throw new TypeError("Argument must be a number");return o(r)},f.allocUnsafeSlow=function(r){if("number"!=typeof r)throw new TypeError("Argument must be a number");return n.SlowBuffer(r)};var u=e;var e$1={},s=u.Buffer,i=s.isEncoding||function(t){switch((t=""+t)&&t.toLowerCase()){case"hex":case"utf8":case"utf-8":case"ascii":case"binary":case"base64":case"ucs2":case"ucs-2":case"utf16le":case"utf-16le":case"raw":return !0;default:return !1}};function a(t){var e;switch(this.encoding=function(t){var e=function(t){if(!t)return "utf8";for(var e;;)switch(t){case"utf8":case"utf-8":return "utf8";case"ucs2":case"ucs-2":case"utf16le":case"utf-16le":return "utf16le";case"latin1":case"binary":return "latin1";case"base64":case"ascii":case"hex":return t;default:if(e)return;t=(""+t).toLowerCase(),e=!0;}}(t);if("string"!=typeof e&&(s.isEncoding===i||!i(t)))throw new Error("Unknown encoding: "+t);return e||t}(t),this.encoding){case"utf16le":this.text=h,this.end=l,e=4;break;case"utf8":this.fillLast=n$1,e=4;break;case"base64":this.text=u$1,this.end=o$1,e=3;break;default:return this.write=f$1,this.end=c,void 0}this.lastNeed=0,this.lastTotal=0,this.lastChar=s.allocUnsafe(e);}function r(t){return t<=127?0:t>>5==6?2:t>>4==14?3:t>>3==30?4:t>>6==2?-1:-2}function n$1(t){var e=this.lastTotal-this.lastNeed,s=function(t,e,s){if(128!=(192&e[0]))return t.lastNeed=0,"�";if(t.lastNeed>1&&e.length>1){if(128!=(192&e[1]))return t.lastNeed=1,"�";if(t.lastNeed>2&&e.length>2&&128!=(192&e[2]))return t.lastNeed=2,"�"}}(this,t);return void 0!==s?s:this.lastNeed<=t.length?(t.copy(this.lastChar,e,0,this.lastNeed),this.lastChar.toString(this.encoding,0,this.lastTotal)):(t.copy(this.lastChar,e,0,t.length),this.lastNeed-=t.length,void 0)}function h(t,e){if((t.length-e)%2==0){var s=t.toString("utf16le",e);if(s){var i=s.charCodeAt(s.length-1);if(i>=55296&&i<=56319)return this.lastNeed=2,this.lastTotal=4,this.lastChar[0]=t[t.length-2],this.lastChar[1]=t[t.length-1],s.slice(0,-1)}return s}return this.lastNeed=1,this.lastTotal=2,this.lastChar[0]=t[t.length-1],t.toString("utf16le",e,t.length-1)}function l(t){var e=t&&t.length?this.write(t):"";if(this.lastNeed){var s=this.lastTotal-this.lastNeed;return e+this.lastChar.toString("utf16le",0,s)}return e}function u$1(t,e){var s=(t.length-e)%3;return 0===s?t.toString("base64",e):(this.lastNeed=3-s,this.lastTotal=3,1===s?this.lastChar[0]=t[t.length-1]:(this.lastChar[0]=t[t.length-2],this.lastChar[1]=t[t.length-1]),t.toString("base64",e,t.length-s))}function o$1(t){var e=t&&t.length?this.write(t):"";return this.lastNeed?e+this.lastChar.toString("base64",0,3-this.lastNeed):e}function f$1(t){return t.toString(this.encoding)}function c(t){return t&&t.length?this.write(t):""}e$1.StringDecoder=a,a.prototype.write=function(t){if(0===t.length)return "";var e,s;if(this.lastNeed){if(void 0===(e=this.fillLast(t)))return "";s=this.lastNeed,this.lastNeed=0;}else s=0;return s<t.length?e?e+this.text(t,s):this.text(t,s):e||""},a.prototype.end=function(t){var e=t&&t.length?this.write(t):"";return this.lastNeed?e+"�":e},a.prototype.text=function(t,e){var s=function(t,e,s){var i=e.length-1;if(i<s)return 0;var a=r(e[i]);if(a>=0)return a>0&&(t.lastNeed=a-1),a;if(--i<s||-2===a)return 0;if((a=r(e[i]))>=0)return a>0&&(t.lastNeed=a-2),a;if(--i<s||-2===a)return 0;if((a=r(e[i]))>=0)return a>0&&(2===a?a=0:t.lastNeed=a-3),a;return 0}(this,t,e);if(!this.lastNeed)return t.toString("utf8",e);this.lastTotal=s;var i=t.length-(s-this.lastNeed);return t.copy(this.lastChar,0,i),t.toString("utf8",e,i)},a.prototype.fillLast=function(t){if(this.lastNeed<=t.length)return t.copy(this.lastChar,this.lastTotal-this.lastNeed,0,this.lastNeed),this.lastChar.toString(this.encoding,0,this.lastTotal);t.copy(this.lastChar,this.lastTotal-this.lastNeed,0,t.length),this.lastNeed-=t.length;};
var exports$2$1 = {},
_dewExec$2$1 = false;
function dew$2$1() {
if (_dewExec$2$1) return exports$2$1;
_dewExec$2$1 = true;
exports$2$1.byteLength = byteLength;
exports$2$1.toByteArray = toByteArray;
exports$2$1.fromByteArray = fromByteArray;
var lookup = [];
var revLookup = [];
var Arr = typeof Uint8Array !== "undefined" ? Uint8Array : Array;
var code = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
for (var i = 0, len = code.length; i < len; ++i) {
lookup[i] = code[i];
revLookup[code.charCodeAt(i)] = i;
} // Support decoding URL-safe base64 strings, as Node.js does.
// See: https://en.wikipedia.org/wiki/Base64#URL_applications
revLookup["-".charCodeAt(0)] = 62;
revLookup["_".charCodeAt(0)] = 63;
function getLens(b64) {
var len = b64.length;
if (len % 4 > 0) {
throw new Error("Invalid string. Length must be a multiple of 4");
} // Trim off extra bytes after placeholder bytes are found
// See: https://github.com/beatgammit/base64-js/issues/42
var validLen = b64.indexOf("=");
if (validLen === -1) validLen = len;
var placeHoldersLen = validLen === len ? 0 : 4 - validLen % 4;
return [validLen, placeHoldersLen];
} // base64 is 4/3 + up to two characters of the original data
function byteLength(b64) {
var lens = getLens(b64);
var validLen = lens[0];
var placeHoldersLen = lens[1];
return (validLen + placeHoldersLen) * 3 / 4 - placeHoldersLen;
}
function _byteLength(b64, validLen, placeHoldersLen) {
return (validLen + placeHoldersLen) * 3 / 4 - placeHoldersLen;
}
function toByteArray(b64) {
var tmp;
var lens = getLens(b64);
var validLen = lens[0];
var placeHoldersLen = lens[1];
var arr = new Arr(_byteLength(b64, validLen, placeHoldersLen));
var curByte = 0; // if there are placeholders, only get up to the last complete 4 chars
var len = placeHoldersLen > 0 ? validLen - 4 : validLen;
var i;
for (i = 0; i < len; i += 4) {
tmp = revLookup[b64.charCodeAt(i)] << 18 | revLookup[b64.charCodeAt(i + 1)] << 12 | revLookup[b64.charCodeAt(i + 2)] << 6 | revLookup[b64.charCodeAt(i + 3)];
arr[curByte++] = tmp >> 16 & 255;
arr[curByte++] = tmp >> 8 & 255;
arr[curByte++] = tmp & 255;
}
if (placeHoldersLen === 2) {
tmp = revLookup[b64.charCodeAt(i)] << 2 | revLookup[b64.charCodeAt(i + 1)] >> 4;
arr[curByte++] = tmp & 255;
}
if (placeHoldersLen === 1) {
tmp = revLookup[b64.charCodeAt(i)] << 10 | revLookup[b64.charCodeAt(i + 1)] << 4 | revLookup[b64.charCodeAt(i + 2)] >> 2;
arr[curByte++] = tmp >> 8 & 255;
arr[curByte++] = tmp & 255;
}
return arr;
}
function tripletToBase64(num) {
return lookup[num >> 18 & 63] + lookup[num >> 12 & 63] + lookup[num >> 6 & 63] + lookup[num & 63];
}
function encodeChunk(uint8, start, end) {
var tmp;
var output = [];
for (var i = start; i < end; i += 3) {
tmp = (uint8[i] << 16 & 16711680) + (uint8[i + 1] << 8 & 65280) + (uint8[i + 2] & 255);
output.push(tripletToBase64(tmp));
}
return output.join("");
}
function fromByteArray(uint8) {
var tmp;
var len = uint8.length;
var extraBytes = len % 3; // if we have 1 byte left, pad 2 bytes
var parts = [];
var maxChunkLength = 16383; // must be multiple of 3
// go through the array every three bytes, we'll deal with trailing stuff later
for (var i = 0, len2 = len - extraBytes; i < len2; i += maxChunkLength) {
parts.push(encodeChunk(uint8, i, i + maxChunkLength > len2 ? len2 : i + maxChunkLength));
} // pad the end with zeros, but make sure to not forget the extra bytes
if (extraBytes === 1) {
tmp = uint8[len - 1];
parts.push(lookup[tmp >> 2] + lookup[tmp << 4 & 63] + "==");
} else if (extraBytes === 2) {
tmp = (uint8[len - 2] << 8) + uint8[len - 1];
parts.push(lookup[tmp >> 10] + lookup[tmp >> 4 & 63] + lookup[tmp << 2 & 63] + "=");
}
return parts.join("");
}
return exports$2$1;
}
var exports$1$1 = {},
_dewExec$1$1 = false;
function dew$1$1() {
if (_dewExec$1$1) return exports$1$1;
_dewExec$1$1 = true;
/*! ieee754. BSD-3-Clause License. Feross Aboukhadijeh <https://feross.org/opensource> */
exports$1$1.read = function (buffer, offset, isLE, mLen, nBytes) {
var e, m;
var eLen = nBytes * 8 - mLen - 1;
var eMax = (1 << eLen) - 1;
var eBias = eMax >> 1;
var nBits = -7;
var i = isLE ? nBytes - 1 : 0;
var d = isLE ? -1 : 1;
var s = buffer[offset + i];
i += d;
e = s & (1 << -nBits) - 1;
s >>= -nBits;
nBits += eLen;
for (; nBits > 0; e = e * 256 + buffer[offset + i], i += d, nBits -= 8) {}
m = e & (1 << -nBits) - 1;
e >>= -nBits;
nBits += mLen;
for (; nBits > 0; m = m * 256 + buffer[offset + i], i += d, nBits -= 8) {}
if (e === 0) {
e = 1 - eBias;
} else if (e === eMax) {
return m ? NaN : (s ? -1 : 1) * Infinity;
} else {
m = m + Math.pow(2, mLen);
e = e - eBias;
}
return (s ? -1 : 1) * m * Math.pow(2, e - mLen);
};
exports$1$1.write = function (buffer, value, offset, isLE, mLen, nBytes) {
var e, m, c;
var eLen = nBytes * 8 - mLen - 1;
var eMax = (1 << eLen) - 1;
var eBias = eMax >> 1;
var rt = mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0;
var i = isLE ? 0 : nBytes - 1;
var d = isLE ? 1 : -1;
var s = value < 0 || value === 0 && 1 / value < 0 ? 1 : 0;
value = Math.abs(value);
if (isNaN(value) || value === Infinity) {
m = isNaN(value) ? 1 : 0;
e = eMax;
} else {
e = Math.floor(Math.log(value) / Math.LN2);
if (value * (c = Math.pow(2, -e)) < 1) {
e--;
c *= 2;
}
if (e + eBias >= 1) {
value += rt / c;
} else {
value += rt * Math.pow(2, 1 - eBias);
}
if (value * c >= 2) {
e++;
c /= 2;
}
if (e + eBias >= eMax) {
m = 0;
e = eMax;
} else if (e + eBias >= 1) {
m = (value * c - 1) * Math.pow(2, mLen);
e = e + eBias;
} else {
m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen);
e = 0;
}
}
for (; mLen >= 8; buffer[offset + i] = m & 255, i += d, m /= 256, mLen -= 8) {}
e = e << mLen | m;
eLen += mLen;
for (; eLen > 0; buffer[offset + i] = e & 255, i += d, e /= 256, eLen -= 8) {}
buffer[offset + i - d] |= s * 128;
};
return exports$1$1;
}
var exports$g = {},
_dewExec$g = false;
function dew$g() {
if (_dewExec$g) return exports$g;
_dewExec$g = true;
const base64 = dew$2$1();
const ieee754 = dew$1$1();
const customInspectSymbol = typeof Symbol === "function" && typeof Symbol["for"] === "function" ? Symbol["for"]("nodejs.util.inspect.custom") // eslint-disable-line dot-notation
: null;
exports$g.Buffer = Buffer;
exports$g.SlowBuffer = SlowBuffer;
exports$g.INSPECT_MAX_BYTES = 50;
const K_MAX_LENGTH = 2147483647;
exports$g.kMaxLength = K_MAX_LENGTH;
/**
* If `Buffer.TYPED_ARRAY_SUPPORT`:
* === true Use Uint8Array implementation (fastest)
* === false Print warning and recommend using `buffer` v4.x which has an Object
* implementation (most compatible, even IE6)
*
* Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+,
* Opera 11.6+, iOS 4.2+.
*
* We report that the browser does not support typed arrays if the are not subclassable
* using __proto__. Firefox 4-29 lacks support for adding new properties to `Uint8Array`
* (See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438). IE 10 lacks support
* for __proto__ and has a buggy typed array implementation.
*/
Buffer.TYPED_ARRAY_SUPPORT = typedArraySupport();
if (!Buffer.TYPED_ARRAY_SUPPORT && typeof console !== "undefined" && typeof console.error === "function") {
console.error("This browser lacks typed array (Uint8Array) support which is required by " + "`buffer` v5.x. Use `buffer` v4.x if you require old browser support.");
}
function typedArraySupport() {
// Can typed array instances can be augmented?
try {
const arr = new Uint8Array(1);
const proto = {
foo: function () {
return 42;
}
};
Object.setPrototypeOf(proto, Uint8Array.prototype);
Object.setPrototypeOf(arr, proto);
return arr.foo() === 42;
} catch (e) {
return false;
}
}
Object.defineProperty(Buffer.prototype, "parent", {
enumerable: true,
get: function () {
if (!Buffer.isBuffer(this)) return undefined;
return this.buffer;
}
});
Object.defineProperty(Buffer.prototype, "offset", {
enumerable: true,
get: function () {
if (!Buffer.isBuffer(this)) return undefined;
return this.byteOffset;
}
});
function createBuffer(length) {
if (length > K_MAX_LENGTH) {
throw new RangeError("The value \"" + length + "\" is invalid for option \"size\"");
} // Return an augmented `Uint8Array` instance
const buf = new Uint8Array(length);
Object.setPrototypeOf(buf, Buffer.prototype);
return buf;
}
/**
* The Buffer constructor returns instances of `Uint8Array` that have their
* prototype changed to `Buffer.prototype`. Furthermore, `Buffer` is a subclass of
* `Uint8Array`, so the returned instances will have all the node `Buffer` methods
* and the `Uint8Array` methods. Square bracket notation works as expected -- it
* returns a single octet.
*
* The `Uint8Array` prototype remains unmodified.
*/
function Buffer(arg, encodingOrOffset, length) {
// Common case.
if (typeof arg === "number") {
if (typeof encodingOrOffset === "string") {
throw new TypeError("The \"string\" argument must be of type string. Received type number");
}
return allocUnsafe(arg);
}
return from(arg, encodingOrOffset, length);
}
Buffer.poolSize = 8192; // not used by this implementation
function from(value, encodingOrOffset, length) {
if (typeof value === "string") {
return fromString(value, encodingOrOffset);
}
if (ArrayBuffer.isView(value)) {
return fromArrayView(value);
}
if (value == null) {
throw new TypeError("The first argument must be one of type string, Buffer, ArrayBuffer, Array, " + "or Array-like Object. Received type " + typeof value);
}
if (isInstance(value, ArrayBuffer) || value && isInstance(value.buffer, ArrayBuffer)) {
return fromArrayBuffer(value, encodingOrOffset, length);
}
if (typeof SharedArrayBuffer !== "undefined" && (isInstance(value, SharedArrayBuffer) || value && isInstance(value.buffer, SharedArrayBuffer))) {
return fromArrayBuffer(value, encodingOrOffset, length);
}
if (typeof value === "number") {
throw new TypeError("The \"value\" argument must not be of type number. Received type number");
}
const valueOf = value.valueOf && value.valueOf();
if (valueOf != null && valueOf !== value) {
return Buffer.from(valueOf, encodingOrOffset, length);
}
const b = fromObject(value);
if (b) return b;
if (typeof Symbol !== "undefined" && Symbol.toPrimitive != null && typeof value[Symbol.toPrimitive] === "function") {
return Buffer.from(value[Symbol.toPrimitive]("string"), encodingOrOffset, length);
}
throw new TypeError("The first argument must be one of type string, Buffer, ArrayBuffer, Array, " + "or Array-like Object. Received type " + typeof value);
}
/**
* Functionally equivalent to Buffer(arg, encoding) but throws a TypeError
* if value is a number.
* Buffer.from(str[, encoding])
* Buffer.from(array)
* Buffer.from(buffer)
* Buffer.from(arrayBuffer[, byteOffset[, length]])
**/
Buffer.from = function (value, encodingOrOffset, length) {
return from(value, encodingOrOffset, length);
}; // Note: Change prototype *after* Buffer.from is defined to workaround Chrome bug:
// https://github.com/feross/buffer/pull/148
Object.setPrototypeOf(Buffer.prototype, Uint8Array.prototype);
Object.setPrototypeOf(Buffer, Uint8Array);
function assertSize(size) {
if (typeof size !== "number") {
throw new TypeError("\"size\" argument must be of type number");
} else if (size < 0) {
throw new RangeError("The value \"" + size + "\" is invalid for option \"size\"");
}
}
function alloc(size, fill, encoding) {
assertSize(size);
if (size <= 0) {
return createBuffer(size);
}
if (fill !== undefined) {
// Only pay attention to encoding if it's a string. This
// prevents accidentally sending in a number that would
// be interpreted as a start offset.
return typeof encoding === "string" ? createBuffer(size).fill(fill, encoding) : createBuffer(size).fill(fill);
}
return createBuffer(size);
}
/**
* Creates a new filled Buffer instance.
* alloc(size[, fill[, encoding]])
**/
Buffer.alloc = function (size, fill, encoding) {
return alloc(size, fill, encoding);
};
function allocUnsafe(size) {
assertSize(size);
return createBuffer(size < 0 ? 0 : checked(size) | 0);
}
/**
* Equivalent to Buffer(num), by default creates a non-zero-filled Buffer instance.
* */
Buffer.allocUnsafe = function (size) {
return allocUnsafe(size);
};
/**
* Equivalent to SlowBuffer(num), by default creates a non-zero-filled Buffer instance.
*/
Buffer.allocUnsafeSlow = function (size) {
return allocUnsafe(size);
};
function fromString(string, encoding) {
if (typeof encoding !== "string" || encoding === "") {
encoding = "utf8";
}
if (!Buffer.isEncoding(encoding)) {
throw new TypeError("Unknown encoding: " + encoding);
}
const length = byteLength(string, encoding) | 0;
let buf = createBuffer(length);
const actual = buf.write(string, encoding);
if (actual !== length) {
// Writing a hex string, for example, that contains invalid characters will
// cause everything after the first invalid character to be ignored. (e.g.
// 'abxxcd' will be treated as 'ab')
buf = buf.slice(0, actual);
}
return buf;
}
function fromArrayLike(array) {
const length = array.length < 0 ? 0 : checked(array.length) | 0;
const buf = createBuffer(length);
for (let i = 0; i < length; i += 1) {
buf[i] = array[i] & 255;
}
return buf;
}
function fromArrayView(arrayView) {
if (isInstance(arrayView, Uint8Array)) {
const copy = new Uint8Array(arrayView);
return fromArrayBuffer(copy.buffer, copy.byteOffset, copy.byteLength);
}
return fromArrayLike(arrayView);
}
function fromArrayBuffer(array, byteOffset, length) {
if (byteOffset < 0 || array.byteLength < byteOffset) {
throw new RangeError("\"offset\" is outside of buffer bounds");
}
if (array.byteLength < byteOffset + (length || 0)) {
throw new RangeError("\"length\" is outside of buffer bounds");
}
let buf;
if (byteOffset === undefined && length === undefined) {
buf = new Uint8Array(array);
} else if (length === undefined) {
buf = new Uint8Array(array, byteOffset);
} else {
buf = new Uint8Array(array, byteOffset, length);
} // Return an augmented `Uint8Array` instance
Object.setPrototypeOf(buf, Buffer.prototype);
return buf;
}
function fromObject(obj) {
if (Buffer.isBuffer(obj)) {
const len = checked(obj.length) | 0;
const buf = createBuffer(len);
if (buf.length === 0) {
return buf;
}
obj.copy(buf, 0, 0, len);
return buf;
}
if (obj.length !== undefined) {
if (typeof obj.length !== "number" || numberIsNaN(obj.length)) {
return createBuffer(0);
}
return fromArrayLike(obj);
}
if (obj.type === "Buffer" && Array.isArray(obj.data)) {
return fromArrayLike(obj.data);
}
}
function checked(length) {
// Note: cannot use `length < K_MAX_LENGTH` here because that fails when
// length is NaN (which is otherwise coerced to zero.)
if (length >= K_MAX_LENGTH) {
throw new RangeError("Attempt to allocate Buffer larger than maximum " + "size: 0x" + K_MAX_LENGTH.toString(16) + " bytes");
}
return length | 0;
}
function SlowBuffer(length) {
if (+length != length) {
// eslint-disable-line eqeqeq
length = 0;
}
return Buffer.alloc(+length);
}
Buffer.isBuffer = function isBuffer(b) {
return b != null && b._isBuffer === true && b !== Buffer.prototype; // so Buffer.isBuffer(Buffer.prototype) will be false
};
Buffer.compare = function compare(a, b) {
if (isInstance(a, Uint8Array)) a = Buffer.from(a, a.offset, a.byteLength);
if (isInstance(b, Uint8Array)) b = Buffer.from(b, b.offset, b.byteLength);
if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {
throw new TypeError("The \"buf1\", \"buf2\" arguments must be one of type Buffer or Uint8Array");
}
if (a === b) return 0;
let x = a.length;
let y = b.length;
for (let i = 0, len = Math.min(x, y); i < len; ++i) {
if (a[i] !== b[i]) {
x = a[i];
y = b[i];
break;
}
}
if (x < y) return -1;
if (y < x) return 1;
return 0;
};
Buffer.isEncoding = function isEncoding(encoding) {
switch (String(encoding).toLowerCase()) {
case "hex":
case "utf8":
case "utf-8":
case "ascii":
case "latin1":
case "binary":
case "base64":
case "ucs2":
case "ucs-2":
case "utf16le":
case "utf-16le":
return true;
default:
return false;
}
};
Buffer.concat = function concat(list, length) {
if (!Array.isArray(list)) {
throw new TypeError("\"list\" argument must be an Array of Buffers");
}
if (list.length === 0) {
return Buffer.alloc(0);
}
let i;
if (length === undefined) {
length = 0;
for (i = 0; i < list.length; ++i) {
length += list[i].length;
}
}
const buffer = Buffer.allocUnsafe(length);
let pos = 0;
for (i = 0; i < list.length; ++i) {
let buf = list[i];
if (isInstance(buf, Uint8Array)) {
if (pos + buf.length > buffer.length) {
if (!Buffer.isBuffer(buf)) buf = Buffer.from(buf);
buf.copy(buffer, pos);
} else {
Uint8Array.prototype.set.call(buffer, buf, pos);
}
} else if (!Buffer.isBuffer(buf)) {
throw new TypeError("\"list\" argument must be an Array of Buffers");
} else {
buf.copy(buffer, pos);
}
pos += buf.length;
}
return buffer;
};
function byteLength(string, encoding) {
if (Buffer.isBuffer(string)) {
return string.length;
}
if (ArrayBuffer.isView(string) || isInstance(string, ArrayBuffer)) {
return string.byteLength;
}
if (typeof string !== "string") {
throw new TypeError("The \"string\" argument must be one of type string, Buffer, or ArrayBuffer. " + "Received type " + typeof string);
}
const len = string.length;
const mustMatch = arguments.length > 2 && arguments[2] === true;
if (!mustMatch && len === 0) return 0; // Use a for loop to avoid recursion
let loweredCase = false;
for (;;) {
switch (encoding) {
case "ascii":
case "latin1":
case "binary":
return len;
case "utf8":
case "utf-8":
return utf8ToBytes(string).length;
case "ucs2":
case "ucs-2":
case "utf16le":
case "utf-16le":
return len * 2;
case "hex":
return len >>> 1;
case "base64":
return base64ToBytes(string).length;
default:
if (loweredCase) {
return mustMatch ? -1 : utf8ToBytes(string).length; // assume utf8
}
encoding = ("" + encoding).toLowerCase();
loweredCase = true;
}
}
}
Buffer.byteLength = byteLength;
function slowToString(encoding, start, end) {
let loweredCase = false; // No need to verify that "this.length <= MAX_UINT32" since it's a read-only
// property of a typed array.
// This behaves neither like String nor Uint8Array in that we set start/end
// to their upper/lower bounds if the value passed is out of range.
// undefined is handled specially as per ECMA-262 6th Edition,
// Section 13.3.3.7 Runtime Semantics: KeyedBindingInitialization.
if (start === undefined || start < 0) {
start = 0;
} // Return early if start > this.length. Done here to prevent potential uint32
// coercion fail below.
if (start > this.length) {
return "";
}
if (end === undefined || end > this.length) {
end = this.length;
}
if (end <= 0) {
return "";
} // Force coercion to uint32. This will also coerce falsey/NaN values to 0.
end >>>= 0;
start >>>= 0;
if (end <= start) {
return "";
}
if (!encoding) encoding = "utf8";
while (true) {
switch (encoding) {
case "hex":
return hexSlice(this, start, end);
case "utf8":
case "utf-8":
return utf8Slice(this, start, end);
case "ascii":
return asciiSlice(this, start, end);
case "latin1":
case "binary":
return latin1Slice(this, start, end);
case "base64":
return base64Slice(this, start, end);
case "ucs2":
case "ucs-2":
case "utf16le":
case "utf-16le":
return utf16leSlice(this, start, end);
default:
if (loweredCase) throw new TypeError("Unknown encoding: " + encoding);
encoding