mirror of
https://github.com/denoland/deno.git
synced 2024-10-30 09:08:00 -04:00
2595 lines
64 KiB
JavaScript
2595 lines
64 KiB
JavaScript
// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
|
|
// Copyright Joyent and Node contributors. All rights reserved. MIT license.
|
|
// Copyright Feross Aboukhadijeh, and other contributors. All rights reserved. MIT license.
|
|
|
|
// TODO(petamoriken): enable prefer-primordials for node polyfills
|
|
// deno-lint-ignore-file prefer-primordials
|
|
|
|
import { TextDecoder, TextEncoder } from "ext:deno_web/08_text_encoding.js";
|
|
import { codes } from "ext:deno_node/internal/error_codes.ts";
|
|
import { encodings } from "ext:deno_node/internal_binding/string_decoder.ts";
|
|
import {
|
|
indexOfBuffer,
|
|
indexOfNumber,
|
|
} from "ext:deno_node/internal_binding/buffer.ts";
|
|
import {
|
|
asciiToBytes,
|
|
base64ToBytes,
|
|
base64UrlToBytes,
|
|
bytesToAscii,
|
|
bytesToUtf16le,
|
|
hexToBytes,
|
|
utf16leToBytes,
|
|
} from "ext:deno_node/internal_binding/_utils.ts";
|
|
import {
|
|
isAnyArrayBuffer,
|
|
isArrayBufferView,
|
|
} from "ext:deno_node/internal/util/types.ts";
|
|
import { normalizeEncoding } from "ext:deno_node/internal/util.mjs";
|
|
import { validateBuffer } from "ext:deno_node/internal/validators.mjs";
|
|
import { isUint8Array } from "ext:deno_node/internal/util/types.ts";
|
|
import {
|
|
forgivingBase64Encode,
|
|
forgivingBase64UrlEncode,
|
|
} from "ext:deno_web/00_infra.js";
|
|
import { atob, btoa } from "ext:deno_web/05_base64.js";
|
|
import { Blob } from "ext:deno_web/09_file.js";
|
|
|
|
export { atob, Blob, btoa };
|
|
|
|
const utf8Encoder = new TextEncoder();
|
|
|
|
// Temporary buffers to convert numbers.
|
|
const float32Array = new Float32Array(1);
|
|
const uInt8Float32Array = new Uint8Array(float32Array.buffer);
|
|
const float64Array = new Float64Array(1);
|
|
const uInt8Float64Array = new Uint8Array(float64Array.buffer);
|
|
|
|
// Check endianness.
|
|
float32Array[0] = -1; // 0xBF800000
|
|
// Either it is [0, 0, 128, 191] or [191, 128, 0, 0]. It is not possible to
|
|
// check this with `os.endianness()` because that is determined at compile time.
|
|
export const bigEndian = uInt8Float32Array[3] === 0;
|
|
|
|
export const kMaxLength = 2147483647;
|
|
export const kStringMaxLength = 536870888;
|
|
const MAX_UINT32 = 2 ** 32;
|
|
|
|
const customInspectSymbol =
|
|
typeof Symbol === "function" && typeof Symbol["for"] === "function"
|
|
? Symbol["for"]("nodejs.util.inspect.custom")
|
|
: null;
|
|
|
|
const INSPECT_MAX_BYTES = 50;
|
|
|
|
export const constants = {
|
|
MAX_LENGTH: kMaxLength,
|
|
MAX_STRING_LENGTH: kStringMaxLength,
|
|
};
|
|
|
|
Object.defineProperty(Buffer.prototype, "parent", {
|
|
enumerable: true,
|
|
get: function () {
|
|
if (!Buffer.isBuffer(this)) {
|
|
return void 0;
|
|
}
|
|
return this.buffer;
|
|
},
|
|
});
|
|
|
|
Object.defineProperty(Buffer.prototype, "offset", {
|
|
enumerable: true,
|
|
get: function () {
|
|
if (!Buffer.isBuffer(this)) {
|
|
return void 0;
|
|
}
|
|
return this.byteOffset;
|
|
},
|
|
});
|
|
|
|
function createBuffer(length) {
|
|
if (length > kMaxLength) {
|
|
throw new RangeError(
|
|
'The value "' + length + '" is invalid for option "size"',
|
|
);
|
|
}
|
|
const buf = new Uint8Array(length);
|
|
Object.setPrototypeOf(buf, Buffer.prototype);
|
|
return buf;
|
|
}
|
|
|
|
export function Buffer(arg, encodingOrOffset, length) {
|
|
if (typeof arg === "number") {
|
|
if (typeof encodingOrOffset === "string") {
|
|
throw new codes.ERR_INVALID_ARG_TYPE(
|
|
"string",
|
|
"string",
|
|
arg,
|
|
);
|
|
}
|
|
return _allocUnsafe(arg);
|
|
}
|
|
return _from(arg, encodingOrOffset, length);
|
|
}
|
|
|
|
Buffer.poolSize = 8192;
|
|
|
|
function _from(value, encodingOrOffset, length) {
|
|
if (typeof value === "string") {
|
|
return fromString(value, encodingOrOffset);
|
|
}
|
|
|
|
if (typeof value === "object" && value !== null) {
|
|
if (isAnyArrayBuffer(value)) {
|
|
return fromArrayBuffer(value, encodingOrOffset, length);
|
|
}
|
|
|
|
const valueOf = value.valueOf && value.valueOf();
|
|
if (
|
|
valueOf != null &&
|
|
valueOf !== value &&
|
|
(typeof valueOf === "string" || typeof valueOf === "object")
|
|
) {
|
|
return _from(valueOf, encodingOrOffset, length);
|
|
}
|
|
|
|
const b = fromObject(value);
|
|
if (b) {
|
|
return b;
|
|
}
|
|
|
|
if (typeof value[Symbol.toPrimitive] === "function") {
|
|
const primitive = value[Symbol.toPrimitive]("string");
|
|
if (typeof primitive === "string") {
|
|
return fromString(primitive, encodingOrOffset);
|
|
}
|
|
}
|
|
}
|
|
|
|
throw new codes.ERR_INVALID_ARG_TYPE(
|
|
"first argument",
|
|
["string", "Buffer", "ArrayBuffer", "Array", "Array-like Object"],
|
|
value,
|
|
);
|
|
}
|
|
|
|
Buffer.from = function from(value, encodingOrOffset, length) {
|
|
return _from(value, encodingOrOffset, length);
|
|
};
|
|
|
|
Object.setPrototypeOf(Buffer.prototype, Uint8Array.prototype);
|
|
|
|
Object.setPrototypeOf(Buffer, Uint8Array);
|
|
|
|
function assertSize(size) {
|
|
validateNumber(size, "size");
|
|
if (!(size >= 0 && size <= kMaxLength)) {
|
|
throw new codes.ERR_INVALID_ARG_VALUE.RangeError("size", size);
|
|
}
|
|
}
|
|
|
|
function _alloc(size, fill, encoding) {
|
|
assertSize(size);
|
|
|
|
const buffer = createBuffer(size);
|
|
if (fill !== undefined) {
|
|
if (encoding !== undefined && typeof encoding !== "string") {
|
|
throw new codes.ERR_INVALID_ARG_TYPE(
|
|
"encoding",
|
|
"string",
|
|
encoding,
|
|
);
|
|
}
|
|
return buffer.fill(fill, encoding);
|
|
}
|
|
return buffer;
|
|
}
|
|
|
|
Buffer.alloc = function alloc(size, fill, encoding) {
|
|
return _alloc(size, fill, encoding);
|
|
};
|
|
|
|
function _allocUnsafe(size) {
|
|
assertSize(size);
|
|
return createBuffer(size < 0 ? 0 : checked(size) | 0);
|
|
}
|
|
|
|
Buffer.allocUnsafe = function allocUnsafe(size) {
|
|
return _allocUnsafe(size);
|
|
};
|
|
|
|
Buffer.allocUnsafeSlow = function allocUnsafeSlow(size) {
|
|
return _allocUnsafe(size);
|
|
};
|
|
|
|
function fromString(string, encoding) {
|
|
if (typeof encoding !== "string" || encoding === "") {
|
|
encoding = "utf8";
|
|
}
|
|
if (!Buffer.isEncoding(encoding)) {
|
|
throw new codes.ERR_UNKNOWN_ENCODING(encoding);
|
|
}
|
|
const length = byteLength(string, encoding) | 0;
|
|
let buf = createBuffer(length);
|
|
const actual = buf.write(string, encoding);
|
|
if (actual !== length) {
|
|
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 fromObject(obj) {
|
|
if (obj.length !== undefined || isAnyArrayBuffer(obj.buffer)) {
|
|
if (typeof obj.length !== "number") {
|
|
return createBuffer(0);
|
|
}
|
|
return fromArrayLike(obj);
|
|
}
|
|
|
|
if (obj.type === "Buffer" && Array.isArray(obj.data)) {
|
|
return fromArrayLike(obj.data);
|
|
}
|
|
}
|
|
|
|
function checked(length) {
|
|
if (length >= kMaxLength) {
|
|
throw new RangeError(
|
|
"Attempt to allocate Buffer larger than maximum size: 0x" +
|
|
kMaxLength.toString(16) + " bytes",
|
|
);
|
|
}
|
|
return length | 0;
|
|
}
|
|
|
|
export function SlowBuffer(length) {
|
|
assertSize(length);
|
|
return Buffer.alloc(+length);
|
|
}
|
|
|
|
Object.setPrototypeOf(SlowBuffer.prototype, Uint8Array.prototype);
|
|
|
|
Object.setPrototypeOf(SlowBuffer, Uint8Array);
|
|
|
|
Buffer.isBuffer = function isBuffer(b) {
|
|
return b != null && b._isBuffer === true && b !== Buffer.prototype;
|
|
};
|
|
|
|
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) {
|
|
return typeof encoding === "string" && encoding.length !== 0 &&
|
|
normalizeEncoding(encoding) !== undefined;
|
|
};
|
|
|
|
Buffer.concat = function concat(list, length) {
|
|
if (!Array.isArray(list)) {
|
|
throw new codes.ERR_INVALID_ARG_TYPE("list", "Array", list);
|
|
}
|
|
|
|
if (list.length === 0) {
|
|
return Buffer.alloc(0);
|
|
}
|
|
|
|
if (length === undefined) {
|
|
length = 0;
|
|
for (let i = 0; i < list.length; i++) {
|
|
if (list[i].length) {
|
|
length += list[i].length;
|
|
}
|
|
}
|
|
} else {
|
|
validateOffset(length, "length");
|
|
}
|
|
|
|
const buffer = Buffer.allocUnsafe(length);
|
|
let pos = 0;
|
|
for (let i = 0; i < list.length; i++) {
|
|
const buf = list[i];
|
|
if (!isUint8Array(buf)) {
|
|
// TODO(BridgeAR): This should not be of type ERR_INVALID_ARG_TYPE.
|
|
// Instead, find the proper error code for this.
|
|
throw new codes.ERR_INVALID_ARG_TYPE(
|
|
`list[${i}]`,
|
|
["Buffer", "Uint8Array"],
|
|
list[i],
|
|
);
|
|
}
|
|
pos += _copyActual(buf, buffer, pos, 0, buf.length);
|
|
}
|
|
|
|
// Note: `length` is always equal to `buffer.length` at this point
|
|
if (pos < length) {
|
|
// Zero-fill the remaining bytes if the specified `length` was more than
|
|
// the actual total length, i.e. if we have some remaining allocated bytes
|
|
// there were not initialized.
|
|
buffer.fill(0, pos, length);
|
|
}
|
|
|
|
return buffer;
|
|
};
|
|
|
|
function byteLength(string, encoding) {
|
|
if (typeof string !== "string") {
|
|
if (isArrayBufferView(string) || isAnyArrayBuffer(string)) {
|
|
return string.byteLength;
|
|
}
|
|
|
|
throw new codes.ERR_INVALID_ARG_TYPE(
|
|
"string",
|
|
["string", "Buffer", "ArrayBuffer"],
|
|
string,
|
|
);
|
|
}
|
|
|
|
const len = string.length;
|
|
const mustMatch = arguments.length > 2 && arguments[2] === true;
|
|
if (!mustMatch && len === 0) {
|
|
return 0;
|
|
}
|
|
|
|
if (!encoding) {
|
|
return (mustMatch ? -1 : byteLengthUtf8(string));
|
|
}
|
|
|
|
const ops = getEncodingOps(encoding);
|
|
if (ops === undefined) {
|
|
return (mustMatch ? -1 : byteLengthUtf8(string));
|
|
}
|
|
return ops.byteLength(string);
|
|
}
|
|
|
|
Buffer.byteLength = byteLength;
|
|
|
|
Buffer.prototype._isBuffer = true;
|
|
|
|
function swap(b, n, m) {
|
|
const i = b[n];
|
|
b[n] = b[m];
|
|
b[m] = i;
|
|
}
|
|
|
|
Buffer.prototype.swap16 = function swap16() {
|
|
const len = this.length;
|
|
if (len % 2 !== 0) {
|
|
throw new RangeError("Buffer size must be a multiple of 16-bits");
|
|
}
|
|
for (let i = 0; i < len; i += 2) {
|
|
swap(this, i, i + 1);
|
|
}
|
|
return this;
|
|
};
|
|
|
|
Buffer.prototype.swap32 = function swap32() {
|
|
const len = this.length;
|
|
if (len % 4 !== 0) {
|
|
throw new RangeError("Buffer size must be a multiple of 32-bits");
|
|
}
|
|
for (let i = 0; i < len; i += 4) {
|
|
swap(this, i, i + 3);
|
|
swap(this, i + 1, i + 2);
|
|
}
|
|
return this;
|
|
};
|
|
|
|
Buffer.prototype.swap64 = function swap64() {
|
|
const len = this.length;
|
|
if (len % 8 !== 0) {
|
|
throw new RangeError("Buffer size must be a multiple of 64-bits");
|
|
}
|
|
for (let i = 0; i < len; i += 8) {
|
|
swap(this, i, i + 7);
|
|
swap(this, i + 1, i + 6);
|
|
swap(this, i + 2, i + 5);
|
|
swap(this, i + 3, i + 4);
|
|
}
|
|
return this;
|
|
};
|
|
|
|
Buffer.prototype.toString = function toString(encoding, start, end) {
|
|
if (arguments.length === 0) {
|
|
return this.utf8Slice(0, this.length);
|
|
}
|
|
|
|
const len = this.length;
|
|
|
|
if (start <= 0) {
|
|
start = 0;
|
|
} else if (start >= len) {
|
|
return "";
|
|
} else {
|
|
start |= 0;
|
|
}
|
|
|
|
if (end === undefined || end > len) {
|
|
end = len;
|
|
} else {
|
|
end |= 0;
|
|
}
|
|
|
|
if (end <= start) {
|
|
return "";
|
|
}
|
|
|
|
if (encoding === undefined) {
|
|
return this.utf8Slice(start, end);
|
|
}
|
|
|
|
const ops = getEncodingOps(encoding);
|
|
if (ops === undefined) {
|
|
throw new codes.ERR_UNKNOWN_ENCODING(encoding);
|
|
}
|
|
|
|
return ops.slice(this, start, end);
|
|
};
|
|
|
|
Buffer.prototype.toLocaleString = Buffer.prototype.toString;
|
|
|
|
Buffer.prototype.equals = function equals(b) {
|
|
if (!isUint8Array(b)) {
|
|
throw new codes.ERR_INVALID_ARG_TYPE(
|
|
"otherBuffer",
|
|
["Buffer", "Uint8Array"],
|
|
b,
|
|
);
|
|
}
|
|
if (this === b) {
|
|
return true;
|
|
}
|
|
return Buffer.compare(this, b) === 0;
|
|
};
|
|
|
|
Buffer.prototype.inspect = function inspect() {
|
|
let str = "";
|
|
const max = INSPECT_MAX_BYTES;
|
|
str = this.toString("hex", 0, max).replace(/(.{2})/g, "$1 ").trim();
|
|
if (this.length > max) {
|
|
str += " ... ";
|
|
}
|
|
return "<Buffer " + str + ">";
|
|
};
|
|
|
|
if (customInspectSymbol) {
|
|
Buffer.prototype[customInspectSymbol] = Buffer.prototype.inspect;
|
|
}
|
|
|
|
Buffer.prototype.compare = function compare(
|
|
target,
|
|
start,
|
|
end,
|
|
thisStart,
|
|
thisEnd,
|
|
) {
|
|
if (isInstance(target, Uint8Array)) {
|
|
target = Buffer.from(target, target.offset, target.byteLength);
|
|
}
|
|
if (!Buffer.isBuffer(target)) {
|
|
throw new codes.ERR_INVALID_ARG_TYPE(
|
|
"target",
|
|
["Buffer", "Uint8Array"],
|
|
target,
|
|
);
|
|
}
|
|
|
|
if (start === undefined) {
|
|
start = 0;
|
|
} else {
|
|
validateOffset(start, "targetStart", 0, kMaxLength);
|
|
}
|
|
|
|
if (end === undefined) {
|
|
end = target.length;
|
|
} else {
|
|
validateOffset(end, "targetEnd", 0, target.length);
|
|
}
|
|
|
|
if (thisStart === undefined) {
|
|
thisStart = 0;
|
|
} else {
|
|
validateOffset(start, "sourceStart", 0, kMaxLength);
|
|
}
|
|
|
|
if (thisEnd === undefined) {
|
|
thisEnd = this.length;
|
|
} else {
|
|
validateOffset(end, "sourceEnd", 0, this.length);
|
|
}
|
|
|
|
if (
|
|
start < 0 || end > target.length || thisStart < 0 ||
|
|
thisEnd > this.length
|
|
) {
|
|
throw new codes.ERR_OUT_OF_RANGE("out of range index", "range");
|
|
}
|
|
|
|
if (thisStart >= thisEnd && start >= end) {
|
|
return 0;
|
|
}
|
|
if (thisStart >= thisEnd) {
|
|
return -1;
|
|
}
|
|
if (start >= end) {
|
|
return 1;
|
|
}
|
|
start >>>= 0;
|
|
end >>>= 0;
|
|
thisStart >>>= 0;
|
|
thisEnd >>>= 0;
|
|
if (this === target) {
|
|
return 0;
|
|
}
|
|
let x = thisEnd - thisStart;
|
|
let y = end - start;
|
|
const len = Math.min(x, y);
|
|
const thisCopy = this.slice(thisStart, thisEnd);
|
|
const targetCopy = target.slice(start, end);
|
|
for (let i = 0; i < len; ++i) {
|
|
if (thisCopy[i] !== targetCopy[i]) {
|
|
x = thisCopy[i];
|
|
y = targetCopy[i];
|
|
break;
|
|
}
|
|
}
|
|
if (x < y) {
|
|
return -1;
|
|
}
|
|
if (y < x) {
|
|
return 1;
|
|
}
|
|
return 0;
|
|
};
|
|
|
|
function bidirectionalIndexOf(buffer, val, byteOffset, encoding, dir) {
|
|
validateBuffer(buffer);
|
|
|
|
if (typeof byteOffset === "string") {
|
|
encoding = byteOffset;
|
|
byteOffset = undefined;
|
|
} else if (byteOffset > 0x7fffffff) {
|
|
byteOffset = 0x7fffffff;
|
|
} else if (byteOffset < -0x80000000) {
|
|
byteOffset = -0x80000000;
|
|
}
|
|
byteOffset = +byteOffset;
|
|
if (Number.isNaN(byteOffset)) {
|
|
byteOffset = dir ? 0 : (buffer.length || buffer.byteLength);
|
|
}
|
|
dir = !!dir;
|
|
|
|
if (typeof val === "number") {
|
|
return indexOfNumber(buffer, val >>> 0, byteOffset, dir);
|
|
}
|
|
|
|
let ops;
|
|
if (encoding === undefined) {
|
|
ops = encodingOps.utf8;
|
|
} else {
|
|
ops = getEncodingOps(encoding);
|
|
}
|
|
|
|
if (typeof val === "string") {
|
|
if (ops === undefined) {
|
|
throw new codes.ERR_UNKNOWN_ENCODING(encoding);
|
|
}
|
|
return ops.indexOf(buffer, val, byteOffset, dir);
|
|
}
|
|
|
|
if (isUint8Array(val)) {
|
|
const encodingVal = ops === undefined ? encodingsMap.utf8 : ops.encodingVal;
|
|
return indexOfBuffer(buffer, val, byteOffset, encodingVal, dir);
|
|
}
|
|
|
|
throw new codes.ERR_INVALID_ARG_TYPE(
|
|
"value",
|
|
["number", "string", "Buffer", "Uint8Array"],
|
|
val,
|
|
);
|
|
}
|
|
|
|
Buffer.prototype.includes = function includes(val, byteOffset, encoding) {
|
|
return this.indexOf(val, byteOffset, encoding) !== -1;
|
|
};
|
|
|
|
Buffer.prototype.indexOf = function indexOf(val, byteOffset, encoding) {
|
|
return bidirectionalIndexOf(this, val, byteOffset, encoding, true);
|
|
};
|
|
|
|
Buffer.prototype.lastIndexOf = function lastIndexOf(
|
|
val,
|
|
byteOffset,
|
|
encoding,
|
|
) {
|
|
return bidirectionalIndexOf(this, val, byteOffset, encoding, false);
|
|
};
|
|
|
|
Buffer.prototype.asciiSlice = function asciiSlice(offset, length) {
|
|
if (offset === 0 && length === this.length) {
|
|
return bytesToAscii(this);
|
|
} else {
|
|
return bytesToAscii(this.slice(offset, length));
|
|
}
|
|
};
|
|
|
|
Buffer.prototype.asciiWrite = function asciiWrite(string, offset, length) {
|
|
return blitBuffer(asciiToBytes(string), this, offset, length);
|
|
};
|
|
|
|
Buffer.prototype.base64Slice = function base64Slice(
|
|
offset,
|
|
length,
|
|
) {
|
|
if (offset === 0 && length === this.length) {
|
|
return forgivingBase64Encode(this);
|
|
} else {
|
|
return forgivingBase64Encode(this.slice(offset, length));
|
|
}
|
|
};
|
|
|
|
Buffer.prototype.base64Write = function base64Write(
|
|
string,
|
|
offset,
|
|
length,
|
|
) {
|
|
return blitBuffer(base64ToBytes(string), this, offset, length);
|
|
};
|
|
|
|
Buffer.prototype.base64urlSlice = function base64urlSlice(
|
|
offset,
|
|
length,
|
|
) {
|
|
if (offset === 0 && length === this.length) {
|
|
return forgivingBase64UrlEncode(this);
|
|
} else {
|
|
return forgivingBase64UrlEncode(this.slice(offset, length));
|
|
}
|
|
};
|
|
|
|
Buffer.prototype.base64urlWrite = function base64urlWrite(
|
|
string,
|
|
offset,
|
|
length,
|
|
) {
|
|
return blitBuffer(base64UrlToBytes(string), this, offset, length);
|
|
};
|
|
|
|
Buffer.prototype.hexWrite = function hexWrite(string, offset, length) {
|
|
return blitBuffer(
|
|
hexToBytes(string, this.length - offset),
|
|
this,
|
|
offset,
|
|
length,
|
|
);
|
|
};
|
|
|
|
Buffer.prototype.hexSlice = function hexSlice(string, offset, length) {
|
|
return _hexSlice(this, string, offset, length);
|
|
};
|
|
|
|
Buffer.prototype.latin1Slice = function latin1Slice(
|
|
string,
|
|
offset,
|
|
length,
|
|
) {
|
|
return _latin1Slice(this, string, offset, length);
|
|
};
|
|
|
|
Buffer.prototype.latin1Write = function latin1Write(
|
|
string,
|
|
offset,
|
|
length,
|
|
) {
|
|
return blitBuffer(asciiToBytes(string), this, offset, length);
|
|
};
|
|
|
|
Buffer.prototype.ucs2Slice = function ucs2Slice(offset, length) {
|
|
if (offset === 0 && length === this.length) {
|
|
return bytesToUtf16le(this);
|
|
} else {
|
|
return bytesToUtf16le(this.slice(offset, length));
|
|
}
|
|
};
|
|
|
|
Buffer.prototype.ucs2Write = function ucs2Write(string, offset, length) {
|
|
return blitBuffer(
|
|
utf16leToBytes(string, this.length - offset),
|
|
this,
|
|
offset,
|
|
length,
|
|
);
|
|
};
|
|
|
|
Buffer.prototype.utf8Slice = function utf8Slice(string, offset, length) {
|
|
return _utf8Slice(this, string, offset, length);
|
|
};
|
|
|
|
Buffer.prototype.utf8Write = function utf8Write(string, offset, length) {
|
|
return blitBuffer(
|
|
utf8ToBytes(string, this.length - offset),
|
|
this,
|
|
offset,
|
|
length,
|
|
);
|
|
};
|
|
|
|
Buffer.prototype.write = function write(string, offset, length, encoding) {
|
|
// Buffer#write(string);
|
|
if (offset === undefined) {
|
|
return this.utf8Write(string, 0, this.length);
|
|
}
|
|
// Buffer#write(string, encoding)
|
|
if (length === undefined && typeof offset === "string") {
|
|
encoding = offset;
|
|
length = this.length;
|
|
offset = 0;
|
|
|
|
// Buffer#write(string, offset[, length][, encoding])
|
|
} else {
|
|
validateOffset(offset, "offset", 0, this.length);
|
|
|
|
const remaining = this.length - offset;
|
|
|
|
if (length === undefined) {
|
|
length = remaining;
|
|
} else if (typeof length === "string") {
|
|
encoding = length;
|
|
length = remaining;
|
|
} else {
|
|
validateOffset(length, "length", 0, this.length);
|
|
if (length > remaining) {
|
|
length = remaining;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!encoding) {
|
|
return this.utf8Write(string, offset, length);
|
|
}
|
|
|
|
const ops = getEncodingOps(encoding);
|
|
if (ops === undefined) {
|
|
throw new codes.ERR_UNKNOWN_ENCODING(encoding);
|
|
}
|
|
return ops.write(this, string, offset, length);
|
|
};
|
|
|
|
Buffer.prototype.toJSON = function toJSON() {
|
|
return {
|
|
type: "Buffer",
|
|
data: Array.prototype.slice.call(this._arr || this, 0),
|
|
};
|
|
};
|
|
function fromArrayBuffer(obj, byteOffset, length) {
|
|
// Convert byteOffset to integer
|
|
if (byteOffset === undefined) {
|
|
byteOffset = 0;
|
|
} else {
|
|
byteOffset = +byteOffset;
|
|
if (Number.isNaN(byteOffset)) {
|
|
byteOffset = 0;
|
|
}
|
|
}
|
|
|
|
const maxLength = obj.byteLength - byteOffset;
|
|
|
|
if (maxLength < 0) {
|
|
throw new codes.ERR_BUFFER_OUT_OF_BOUNDS("offset");
|
|
}
|
|
|
|
if (length === undefined) {
|
|
length = maxLength;
|
|
} else {
|
|
// Convert length to non-negative integer.
|
|
length = +length;
|
|
if (length > 0) {
|
|
if (length > maxLength) {
|
|
throw new codes.ERR_BUFFER_OUT_OF_BOUNDS("length");
|
|
}
|
|
} else {
|
|
length = 0;
|
|
}
|
|
}
|
|
|
|
const buffer = new Uint8Array(obj, byteOffset, length);
|
|
Object.setPrototypeOf(buffer, Buffer.prototype);
|
|
return buffer;
|
|
}
|
|
|
|
function _base64Slice(buf, start, end) {
|
|
if (start === 0 && end === buf.length) {
|
|
return forgivingBase64Encode(buf);
|
|
} else {
|
|
return forgivingBase64Encode(buf.slice(start, end));
|
|
}
|
|
}
|
|
|
|
const decoder = new TextDecoder();
|
|
|
|
function _utf8Slice(buf, start, end) {
|
|
return decoder.decode(buf.slice(start, end));
|
|
}
|
|
|
|
function _latin1Slice(buf, start, end) {
|
|
let ret = "";
|
|
end = Math.min(buf.length, end);
|
|
for (let i = start; i < end; ++i) {
|
|
ret += String.fromCharCode(buf[i]);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
function _hexSlice(buf, start, end) {
|
|
const len = buf.length;
|
|
if (!start || start < 0) {
|
|
start = 0;
|
|
}
|
|
if (!end || end < 0 || end > len) {
|
|
end = len;
|
|
}
|
|
let out = "";
|
|
for (let i = start; i < end; ++i) {
|
|
out += hexSliceLookupTable[buf[i]];
|
|
}
|
|
return out;
|
|
}
|
|
|
|
Buffer.prototype.slice = function slice(start, end) {
|
|
return this.subarray(start, end);
|
|
};
|
|
|
|
Buffer.prototype.readUintLE = Buffer.prototype.readUIntLE = function readUIntLE(
|
|
offset,
|
|
byteLength,
|
|
) {
|
|
if (offset === undefined) {
|
|
throw new codes.ERR_INVALID_ARG_TYPE("offset", "number", offset);
|
|
}
|
|
if (byteLength === 6) {
|
|
return readUInt48LE(this, offset);
|
|
}
|
|
if (byteLength === 5) {
|
|
return readUInt40LE(this, offset);
|
|
}
|
|
if (byteLength === 3) {
|
|
return readUInt24LE(this, offset);
|
|
}
|
|
if (byteLength === 4) {
|
|
return this.readUInt32LE(offset);
|
|
}
|
|
if (byteLength === 2) {
|
|
return this.readUInt16LE(offset);
|
|
}
|
|
if (byteLength === 1) {
|
|
return this.readUInt8(offset);
|
|
}
|
|
|
|
boundsError(byteLength, 6, "byteLength");
|
|
};
|
|
|
|
Buffer.prototype.readUintBE = Buffer.prototype.readUIntBE = function readUIntBE(
|
|
offset,
|
|
byteLength,
|
|
) {
|
|
if (offset === undefined) {
|
|
throw new codes.ERR_INVALID_ARG_TYPE("offset", "number", offset);
|
|
}
|
|
if (byteLength === 6) {
|
|
return readUInt48BE(this, offset);
|
|
}
|
|
if (byteLength === 5) {
|
|
return readUInt40BE(this, offset);
|
|
}
|
|
if (byteLength === 3) {
|
|
return readUInt24BE(this, offset);
|
|
}
|
|
if (byteLength === 4) {
|
|
return this.readUInt32BE(offset);
|
|
}
|
|
if (byteLength === 2) {
|
|
return this.readUInt16BE(offset);
|
|
}
|
|
if (byteLength === 1) {
|
|
return this.readUInt8(offset);
|
|
}
|
|
|
|
boundsError(byteLength, 6, "byteLength");
|
|
};
|
|
|
|
Buffer.prototype.readUint8 = Buffer.prototype.readUInt8 = function readUInt8(
|
|
offset = 0,
|
|
) {
|
|
validateNumber(offset, "offset");
|
|
const val = this[offset];
|
|
if (val === undefined) {
|
|
boundsError(offset, this.length - 1);
|
|
}
|
|
|
|
return val;
|
|
};
|
|
|
|
Buffer.prototype.readUint16BE = Buffer.prototype.readUInt16BE = readUInt16BE;
|
|
|
|
Buffer.prototype.readUint16LE =
|
|
Buffer.prototype.readUInt16LE =
|
|
function readUInt16LE(offset = 0) {
|
|
validateNumber(offset, "offset");
|
|
const first = this[offset];
|
|
const last = this[offset + 1];
|
|
if (first === undefined || last === undefined) {
|
|
boundsError(offset, this.length - 2);
|
|
}
|
|
|
|
return first + last * 2 ** 8;
|
|
};
|
|
|
|
Buffer.prototype.readUint32LE =
|
|
Buffer.prototype.readUInt32LE =
|
|
function readUInt32LE(offset = 0) {
|
|
validateNumber(offset, "offset");
|
|
const first = this[offset];
|
|
const last = this[offset + 3];
|
|
if (first === undefined || last === undefined) {
|
|
boundsError(offset, this.length - 4);
|
|
}
|
|
|
|
return first +
|
|
this[++offset] * 2 ** 8 +
|
|
this[++offset] * 2 ** 16 +
|
|
last * 2 ** 24;
|
|
};
|
|
|
|
Buffer.prototype.readUint32BE = Buffer.prototype.readUInt32BE = readUInt32BE;
|
|
|
|
Buffer.prototype.readBigUint64LE =
|
|
Buffer.prototype.readBigUInt64LE =
|
|
defineBigIntMethod(
|
|
function readBigUInt64LE(offset) {
|
|
offset = offset >>> 0;
|
|
validateNumber(offset, "offset");
|
|
const first = this[offset];
|
|
const last = this[offset + 7];
|
|
if (first === void 0 || last === void 0) {
|
|
boundsError(offset, this.length - 8);
|
|
}
|
|
const lo = first + this[++offset] * 2 ** 8 +
|
|
this[++offset] * 2 ** 16 +
|
|
this[++offset] * 2 ** 24;
|
|
const hi = this[++offset] + this[++offset] * 2 ** 8 +
|
|
this[++offset] * 2 ** 16 + last * 2 ** 24;
|
|
return BigInt(lo) + (BigInt(hi) << BigInt(32));
|
|
},
|
|
);
|
|
|
|
Buffer.prototype.readBigUint64BE =
|
|
Buffer.prototype.readBigUInt64BE =
|
|
defineBigIntMethod(
|
|
function readBigUInt64BE(offset) {
|
|
offset = offset >>> 0;
|
|
validateNumber(offset, "offset");
|
|
const first = this[offset];
|
|
const last = this[offset + 7];
|
|
if (first === void 0 || last === void 0) {
|
|
boundsError(offset, this.length - 8);
|
|
}
|
|
const hi = first * 2 ** 24 + this[++offset] * 2 ** 16 +
|
|
this[++offset] * 2 ** 8 + this[++offset];
|
|
const lo = this[++offset] * 2 ** 24 + this[++offset] * 2 ** 16 +
|
|
this[++offset] * 2 ** 8 + last;
|
|
return (BigInt(hi) << BigInt(32)) + BigInt(lo);
|
|
},
|
|
);
|
|
|
|
Buffer.prototype.readIntLE = function readIntLE(
|
|
offset,
|
|
byteLength,
|
|
) {
|
|
if (offset === undefined) {
|
|
throw new codes.ERR_INVALID_ARG_TYPE("offset", "number", offset);
|
|
}
|
|
if (byteLength === 6) {
|
|
return readInt48LE(this, offset);
|
|
}
|
|
if (byteLength === 5) {
|
|
return readInt40LE(this, offset);
|
|
}
|
|
if (byteLength === 3) {
|
|
return readInt24LE(this, offset);
|
|
}
|
|
if (byteLength === 4) {
|
|
return this.readInt32LE(offset);
|
|
}
|
|
if (byteLength === 2) {
|
|
return this.readInt16LE(offset);
|
|
}
|
|
if (byteLength === 1) {
|
|
return this.readInt8(offset);
|
|
}
|
|
|
|
boundsError(byteLength, 6, "byteLength");
|
|
};
|
|
|
|
Buffer.prototype.readIntBE = function readIntBE(offset, byteLength) {
|
|
if (offset === undefined) {
|
|
throw new codes.ERR_INVALID_ARG_TYPE("offset", "number", offset);
|
|
}
|
|
if (byteLength === 6) {
|
|
return readInt48BE(this, offset);
|
|
}
|
|
if (byteLength === 5) {
|
|
return readInt40BE(this, offset);
|
|
}
|
|
if (byteLength === 3) {
|
|
return readInt24BE(this, offset);
|
|
}
|
|
if (byteLength === 4) {
|
|
return this.readInt32BE(offset);
|
|
}
|
|
if (byteLength === 2) {
|
|
return this.readInt16BE(offset);
|
|
}
|
|
if (byteLength === 1) {
|
|
return this.readInt8(offset);
|
|
}
|
|
|
|
boundsError(byteLength, 6, "byteLength");
|
|
};
|
|
|
|
Buffer.prototype.readInt8 = function readInt8(offset = 0) {
|
|
validateNumber(offset, "offset");
|
|
const val = this[offset];
|
|
if (val === undefined) {
|
|
boundsError(offset, this.length - 1);
|
|
}
|
|
|
|
return val | (val & 2 ** 7) * 0x1fffffe;
|
|
};
|
|
|
|
Buffer.prototype.readInt16LE = function readInt16LE(offset = 0) {
|
|
validateNumber(offset, "offset");
|
|
const first = this[offset];
|
|
const last = this[offset + 1];
|
|
if (first === undefined || last === undefined) {
|
|
boundsError(offset, this.length - 2);
|
|
}
|
|
|
|
const val = first + last * 2 ** 8;
|
|
return val | (val & 2 ** 15) * 0x1fffe;
|
|
};
|
|
|
|
Buffer.prototype.readInt16BE = function readInt16BE(offset = 0) {
|
|
validateNumber(offset, "offset");
|
|
const first = this[offset];
|
|
const last = this[offset + 1];
|
|
if (first === undefined || last === undefined) {
|
|
boundsError(offset, this.length - 2);
|
|
}
|
|
|
|
const val = first * 2 ** 8 + last;
|
|
return val | (val & 2 ** 15) * 0x1fffe;
|
|
};
|
|
|
|
Buffer.prototype.readInt32LE = function readInt32LE(offset = 0) {
|
|
validateNumber(offset, "offset");
|
|
const first = this[offset];
|
|
const last = this[offset + 3];
|
|
if (first === undefined || last === undefined) {
|
|
boundsError(offset, this.length - 4);
|
|
}
|
|
|
|
return first +
|
|
this[++offset] * 2 ** 8 +
|
|
this[++offset] * 2 ** 16 +
|
|
(last << 24); // Overflow
|
|
};
|
|
|
|
Buffer.prototype.readInt32BE = function readInt32BE(offset = 0) {
|
|
validateNumber(offset, "offset");
|
|
const first = this[offset];
|
|
const last = this[offset + 3];
|
|
if (first === undefined || last === undefined) {
|
|
boundsError(offset, this.length - 4);
|
|
}
|
|
|
|
return (first << 24) + // Overflow
|
|
this[++offset] * 2 ** 16 +
|
|
this[++offset] * 2 ** 8 +
|
|
last;
|
|
};
|
|
|
|
Buffer.prototype.readBigInt64LE = defineBigIntMethod(
|
|
function readBigInt64LE(offset) {
|
|
offset = offset >>> 0;
|
|
validateNumber(offset, "offset");
|
|
const first = this[offset];
|
|
const last = this[offset + 7];
|
|
if (first === void 0 || last === void 0) {
|
|
boundsError(offset, this.length - 8);
|
|
}
|
|
const val = this[offset + 4] + this[offset + 5] * 2 ** 8 +
|
|
this[offset + 6] * 2 ** 16 + (last << 24);
|
|
return (BigInt(val) << BigInt(32)) +
|
|
BigInt(
|
|
first + this[++offset] * 2 ** 8 + this[++offset] * 2 ** 16 +
|
|
this[++offset] * 2 ** 24,
|
|
);
|
|
},
|
|
);
|
|
|
|
Buffer.prototype.readBigInt64BE = defineBigIntMethod(
|
|
function readBigInt64BE(offset) {
|
|
offset = offset >>> 0;
|
|
validateNumber(offset, "offset");
|
|
const first = this[offset];
|
|
const last = this[offset + 7];
|
|
if (first === void 0 || last === void 0) {
|
|
boundsError(offset, this.length - 8);
|
|
}
|
|
const val = (first << 24) + this[++offset] * 2 ** 16 +
|
|
this[++offset] * 2 ** 8 + this[++offset];
|
|
return (BigInt(val) << BigInt(32)) +
|
|
BigInt(
|
|
this[++offset] * 2 ** 24 + this[++offset] * 2 ** 16 +
|
|
this[++offset] * 2 ** 8 + last,
|
|
);
|
|
},
|
|
);
|
|
|
|
Buffer.prototype.readFloatLE = function readFloatLE(offset) {
|
|
return bigEndian
|
|
? readFloatBackwards(this, offset)
|
|
: readFloatForwards(this, offset);
|
|
};
|
|
|
|
Buffer.prototype.readFloatBE = function readFloatBE(offset) {
|
|
return bigEndian
|
|
? readFloatForwards(this, offset)
|
|
: readFloatBackwards(this, offset);
|
|
};
|
|
|
|
Buffer.prototype.readDoubleLE = function readDoubleLE(offset) {
|
|
return bigEndian
|
|
? readDoubleBackwards(this, offset)
|
|
: readDoubleForwards(this, offset);
|
|
};
|
|
|
|
Buffer.prototype.readDoubleBE = function readDoubleBE(offset) {
|
|
return bigEndian
|
|
? readDoubleForwards(this, offset)
|
|
: readDoubleBackwards(this, offset);
|
|
};
|
|
|
|
Buffer.prototype.writeUintLE =
|
|
Buffer.prototype.writeUIntLE =
|
|
function writeUIntLE(value, offset, byteLength) {
|
|
if (byteLength === 6) {
|
|
return writeU_Int48LE(this, value, offset, 0, 0xffffffffffff);
|
|
}
|
|
if (byteLength === 5) {
|
|
return writeU_Int40LE(this, value, offset, 0, 0xffffffffff);
|
|
}
|
|
if (byteLength === 3) {
|
|
return writeU_Int24LE(this, value, offset, 0, 0xffffff);
|
|
}
|
|
if (byteLength === 4) {
|
|
return writeU_Int32LE(this, value, offset, 0, 0xffffffff);
|
|
}
|
|
if (byteLength === 2) {
|
|
return writeU_Int16LE(this, value, offset, 0, 0xffff);
|
|
}
|
|
if (byteLength === 1) {
|
|
return writeU_Int8(this, value, offset, 0, 0xff);
|
|
}
|
|
|
|
boundsError(byteLength, 6, "byteLength");
|
|
};
|
|
|
|
Buffer.prototype.writeUintBE =
|
|
Buffer.prototype.writeUIntBE =
|
|
function writeUIntBE(value, offset, byteLength) {
|
|
if (byteLength === 6) {
|
|
return writeU_Int48BE(this, value, offset, 0, 0xffffffffffff);
|
|
}
|
|
if (byteLength === 5) {
|
|
return writeU_Int40BE(this, value, offset, 0, 0xffffffffff);
|
|
}
|
|
if (byteLength === 3) {
|
|
return writeU_Int24BE(this, value, offset, 0, 0xffffff);
|
|
}
|
|
if (byteLength === 4) {
|
|
return writeU_Int32BE(this, value, offset, 0, 0xffffffff);
|
|
}
|
|
if (byteLength === 2) {
|
|
return writeU_Int16BE(this, value, offset, 0, 0xffff);
|
|
}
|
|
if (byteLength === 1) {
|
|
return writeU_Int8(this, value, offset, 0, 0xff);
|
|
}
|
|
|
|
boundsError(byteLength, 6, "byteLength");
|
|
};
|
|
|
|
Buffer.prototype.writeUint8 = Buffer.prototype.writeUInt8 = function writeUInt8(
|
|
value,
|
|
offset = 0,
|
|
) {
|
|
return writeU_Int8(this, value, offset, 0, 0xff);
|
|
};
|
|
|
|
Buffer.prototype.writeUint16LE =
|
|
Buffer.prototype.writeUInt16LE =
|
|
function writeUInt16LE(value, offset = 0) {
|
|
return writeU_Int16LE(this, value, offset, 0, 0xffff);
|
|
};
|
|
|
|
Buffer.prototype.writeUint16BE =
|
|
Buffer.prototype.writeUInt16BE =
|
|
function writeUInt16BE(value, offset = 0) {
|
|
return writeU_Int16BE(this, value, offset, 0, 0xffff);
|
|
};
|
|
|
|
Buffer.prototype.writeUint32LE =
|
|
Buffer.prototype.writeUInt32LE =
|
|
function writeUInt32LE(value, offset = 0) {
|
|
return _writeUInt32LE(this, value, offset, 0, 0xffffffff);
|
|
};
|
|
|
|
Buffer.prototype.writeUint32BE =
|
|
Buffer.prototype.writeUInt32BE =
|
|
function writeUInt32BE(value, offset = 0) {
|
|
return _writeUInt32BE(this, value, offset, 0, 0xffffffff);
|
|
};
|
|
|
|
function wrtBigUInt64LE(buf, value, offset, min, max) {
|
|
checkIntBI(value, min, max, buf, offset, 7);
|
|
let lo = Number(value & BigInt(4294967295));
|
|
buf[offset++] = lo;
|
|
lo = lo >> 8;
|
|
buf[offset++] = lo;
|
|
lo = lo >> 8;
|
|
buf[offset++] = lo;
|
|
lo = lo >> 8;
|
|
buf[offset++] = lo;
|
|
let hi = Number(value >> BigInt(32) & BigInt(4294967295));
|
|
buf[offset++] = hi;
|
|
hi = hi >> 8;
|
|
buf[offset++] = hi;
|
|
hi = hi >> 8;
|
|
buf[offset++] = hi;
|
|
hi = hi >> 8;
|
|
buf[offset++] = hi;
|
|
return offset;
|
|
}
|
|
|
|
function wrtBigUInt64BE(buf, value, offset, min, max) {
|
|
checkIntBI(value, min, max, buf, offset, 7);
|
|
let lo = Number(value & BigInt(4294967295));
|
|
buf[offset + 7] = lo;
|
|
lo = lo >> 8;
|
|
buf[offset + 6] = lo;
|
|
lo = lo >> 8;
|
|
buf[offset + 5] = lo;
|
|
lo = lo >> 8;
|
|
buf[offset + 4] = lo;
|
|
let hi = Number(value >> BigInt(32) & BigInt(4294967295));
|
|
buf[offset + 3] = hi;
|
|
hi = hi >> 8;
|
|
buf[offset + 2] = hi;
|
|
hi = hi >> 8;
|
|
buf[offset + 1] = hi;
|
|
hi = hi >> 8;
|
|
buf[offset] = hi;
|
|
return offset + 8;
|
|
}
|
|
|
|
Buffer.prototype.writeBigUint64LE =
|
|
Buffer.prototype.writeBigUInt64LE =
|
|
defineBigIntMethod(
|
|
function writeBigUInt64LE(value, offset = 0) {
|
|
return wrtBigUInt64LE(
|
|
this,
|
|
value,
|
|
offset,
|
|
BigInt(0),
|
|
BigInt("0xffffffffffffffff"),
|
|
);
|
|
},
|
|
);
|
|
|
|
Buffer.prototype.writeBigUint64BE =
|
|
Buffer.prototype.writeBigUInt64BE =
|
|
defineBigIntMethod(
|
|
function writeBigUInt64BE(value, offset = 0) {
|
|
return wrtBigUInt64BE(
|
|
this,
|
|
value,
|
|
offset,
|
|
BigInt(0),
|
|
BigInt("0xffffffffffffffff"),
|
|
);
|
|
},
|
|
);
|
|
|
|
Buffer.prototype.writeIntLE = function writeIntLE(
|
|
value,
|
|
offset,
|
|
byteLength,
|
|
) {
|
|
if (byteLength === 6) {
|
|
return writeU_Int48LE(
|
|
this,
|
|
value,
|
|
offset,
|
|
-0x800000000000,
|
|
0x7fffffffffff,
|
|
);
|
|
}
|
|
if (byteLength === 5) {
|
|
return writeU_Int40LE(this, value, offset, -0x8000000000, 0x7fffffffff);
|
|
}
|
|
if (byteLength === 3) {
|
|
return writeU_Int24LE(this, value, offset, -0x800000, 0x7fffff);
|
|
}
|
|
if (byteLength === 4) {
|
|
return writeU_Int32LE(this, value, offset, -0x80000000, 0x7fffffff);
|
|
}
|
|
if (byteLength === 2) {
|
|
return writeU_Int16LE(this, value, offset, -0x8000, 0x7fff);
|
|
}
|
|
if (byteLength === 1) {
|
|
return writeU_Int8(this, value, offset, -0x80, 0x7f);
|
|
}
|
|
|
|
boundsError(byteLength, 6, "byteLength");
|
|
};
|
|
|
|
Buffer.prototype.writeIntBE = function writeIntBE(
|
|
value,
|
|
offset,
|
|
byteLength,
|
|
) {
|
|
if (byteLength === 6) {
|
|
return writeU_Int48BE(
|
|
this,
|
|
value,
|
|
offset,
|
|
-0x800000000000,
|
|
0x7fffffffffff,
|
|
);
|
|
}
|
|
if (byteLength === 5) {
|
|
return writeU_Int40BE(this, value, offset, -0x8000000000, 0x7fffffffff);
|
|
}
|
|
if (byteLength === 3) {
|
|
return writeU_Int24BE(this, value, offset, -0x800000, 0x7fffff);
|
|
}
|
|
if (byteLength === 4) {
|
|
return writeU_Int32BE(this, value, offset, -0x80000000, 0x7fffffff);
|
|
}
|
|
if (byteLength === 2) {
|
|
return writeU_Int16BE(this, value, offset, -0x8000, 0x7fff);
|
|
}
|
|
if (byteLength === 1) {
|
|
return writeU_Int8(this, value, offset, -0x80, 0x7f);
|
|
}
|
|
|
|
boundsError(byteLength, 6, "byteLength");
|
|
};
|
|
|
|
Buffer.prototype.writeInt8 = function writeInt8(value, offset = 0) {
|
|
return writeU_Int8(this, value, offset, -0x80, 0x7f);
|
|
};
|
|
|
|
Buffer.prototype.writeInt16LE = function writeInt16LE(value, offset = 0) {
|
|
return writeU_Int16LE(this, value, offset, -0x8000, 0x7fff);
|
|
};
|
|
|
|
Buffer.prototype.writeInt16BE = function writeInt16BE(
|
|
value,
|
|
offset = 0,
|
|
) {
|
|
return writeU_Int16BE(this, value, offset, -0x8000, 0x7fff);
|
|
};
|
|
|
|
Buffer.prototype.writeInt32LE = function writeInt32LE(value, offset = 0) {
|
|
return writeU_Int32LE(this, value, offset, -0x80000000, 0x7fffffff);
|
|
};
|
|
|
|
Buffer.prototype.writeInt32BE = function writeInt32BE(value, offset = 0) {
|
|
return writeU_Int32BE(this, value, offset, -0x80000000, 0x7fffffff);
|
|
};
|
|
|
|
Buffer.prototype.writeBigInt64LE = defineBigIntMethod(
|
|
function writeBigInt64LE(value, offset = 0) {
|
|
return wrtBigUInt64LE(
|
|
this,
|
|
value,
|
|
offset,
|
|
-BigInt("0x8000000000000000"),
|
|
BigInt("0x7fffffffffffffff"),
|
|
);
|
|
},
|
|
);
|
|
|
|
Buffer.prototype.writeBigInt64BE = defineBigIntMethod(
|
|
function writeBigInt64BE(value, offset = 0) {
|
|
return wrtBigUInt64BE(
|
|
this,
|
|
value,
|
|
offset,
|
|
-BigInt("0x8000000000000000"),
|
|
BigInt("0x7fffffffffffffff"),
|
|
);
|
|
},
|
|
);
|
|
|
|
Buffer.prototype.writeFloatLE = function writeFloatLE(
|
|
value,
|
|
offset,
|
|
) {
|
|
return bigEndian
|
|
? writeFloatBackwards(this, value, offset)
|
|
: writeFloatForwards(this, value, offset);
|
|
};
|
|
|
|
Buffer.prototype.writeFloatBE = function writeFloatBE(
|
|
value,
|
|
offset,
|
|
) {
|
|
return bigEndian
|
|
? writeFloatForwards(this, value, offset)
|
|
: writeFloatBackwards(this, value, offset);
|
|
};
|
|
|
|
Buffer.prototype.writeDoubleLE = function writeDoubleLE(
|
|
value,
|
|
offset,
|
|
) {
|
|
return bigEndian
|
|
? writeDoubleBackwards(this, value, offset)
|
|
: writeDoubleForwards(this, value, offset);
|
|
};
|
|
|
|
Buffer.prototype.writeDoubleBE = function writeDoubleBE(
|
|
value,
|
|
offset,
|
|
) {
|
|
return bigEndian
|
|
? writeDoubleForwards(this, value, offset)
|
|
: writeDoubleBackwards(this, value, offset);
|
|
};
|
|
|
|
Buffer.prototype.copy = function copy(
|
|
target,
|
|
targetStart,
|
|
sourceStart,
|
|
sourceEnd,
|
|
) {
|
|
if (!isUint8Array(this)) {
|
|
throw new codes.ERR_INVALID_ARG_TYPE(
|
|
"source",
|
|
["Buffer", "Uint8Array"],
|
|
this,
|
|
);
|
|
}
|
|
|
|
if (!isUint8Array(target)) {
|
|
throw new codes.ERR_INVALID_ARG_TYPE(
|
|
"target",
|
|
["Buffer", "Uint8Array"],
|
|
target,
|
|
);
|
|
}
|
|
|
|
if (targetStart === undefined) {
|
|
targetStart = 0;
|
|
} else {
|
|
targetStart = toInteger(targetStart, 0);
|
|
if (targetStart < 0) {
|
|
throw new codes.ERR_OUT_OF_RANGE("targetStart", ">= 0", targetStart);
|
|
}
|
|
}
|
|
|
|
if (sourceStart === undefined) {
|
|
sourceStart = 0;
|
|
} else {
|
|
sourceStart = toInteger(sourceStart, 0);
|
|
if (sourceStart < 0) {
|
|
throw new codes.ERR_OUT_OF_RANGE("sourceStart", ">= 0", sourceStart);
|
|
}
|
|
if (sourceStart >= MAX_UINT32) {
|
|
throw new codes.ERR_OUT_OF_RANGE(
|
|
"sourceStart",
|
|
`< ${MAX_UINT32}`,
|
|
sourceStart,
|
|
);
|
|
}
|
|
}
|
|
|
|
if (sourceEnd === undefined) {
|
|
sourceEnd = this.length;
|
|
} else {
|
|
sourceEnd = toInteger(sourceEnd, 0);
|
|
if (sourceEnd < 0) {
|
|
throw new codes.ERR_OUT_OF_RANGE("sourceEnd", ">= 0", sourceEnd);
|
|
}
|
|
if (sourceEnd >= MAX_UINT32) {
|
|
throw new codes.ERR_OUT_OF_RANGE(
|
|
"sourceEnd",
|
|
`< ${MAX_UINT32}`,
|
|
sourceEnd,
|
|
);
|
|
}
|
|
}
|
|
|
|
if (targetStart >= target.length) {
|
|
return 0;
|
|
}
|
|
|
|
if (sourceEnd > 0 && sourceEnd < sourceStart) {
|
|
sourceEnd = sourceStart;
|
|
}
|
|
if (sourceEnd === sourceStart) {
|
|
return 0;
|
|
}
|
|
if (target.length === 0 || this.length === 0) {
|
|
return 0;
|
|
}
|
|
|
|
if (sourceEnd > this.length) {
|
|
sourceEnd = this.length;
|
|
}
|
|
|
|
if (target.length - targetStart < sourceEnd - sourceStart) {
|
|
sourceEnd = target.length - targetStart + sourceStart;
|
|
}
|
|
|
|
const len = sourceEnd - sourceStart;
|
|
if (
|
|
this === target && typeof Uint8Array.prototype.copyWithin === "function"
|
|
) {
|
|
this.copyWithin(targetStart, sourceStart, sourceEnd);
|
|
} else {
|
|
Uint8Array.prototype.set.call(
|
|
target,
|
|
this.subarray(sourceStart, sourceEnd),
|
|
targetStart,
|
|
);
|
|
}
|
|
return len;
|
|
};
|
|
|
|
Buffer.prototype.fill = function fill(val, start, end, encoding) {
|
|
if (typeof val === "string") {
|
|
if (typeof start === "string") {
|
|
encoding = start;
|
|
start = 0;
|
|
end = this.length;
|
|
} else if (typeof end === "string") {
|
|
encoding = end;
|
|
end = this.length;
|
|
}
|
|
if (encoding !== void 0 && typeof encoding !== "string") {
|
|
throw new TypeError("encoding must be a string");
|
|
}
|
|
if (typeof encoding === "string" && !Buffer.isEncoding(encoding)) {
|
|
throw new TypeError("Unknown encoding: " + encoding);
|
|
}
|
|
if (val.length === 1) {
|
|
const code = val.charCodeAt(0);
|
|
if (encoding === "utf8" && code < 128 || encoding === "latin1") {
|
|
val = code;
|
|
}
|
|
}
|
|
} else if (typeof val === "number") {
|
|
val = val & 255;
|
|
} else if (typeof val === "boolean") {
|
|
val = Number(val);
|
|
}
|
|
if (start < 0 || this.length < start || this.length < end) {
|
|
throw new RangeError("Out of range index");
|
|
}
|
|
if (end <= start) {
|
|
return this;
|
|
}
|
|
start = start >>> 0;
|
|
end = end === void 0 ? this.length : end >>> 0;
|
|
if (!val) {
|
|
val = 0;
|
|
}
|
|
let i;
|
|
if (typeof val === "number") {
|
|
for (i = start; i < end; ++i) {
|
|
this[i] = val;
|
|
}
|
|
} else {
|
|
const bytes = Buffer.isBuffer(val) ? val : Buffer.from(val, encoding);
|
|
const len = bytes.length;
|
|
if (len === 0) {
|
|
throw new codes.ERR_INVALID_ARG_VALUE(
|
|
"value",
|
|
val,
|
|
);
|
|
}
|
|
for (i = 0; i < end - start; ++i) {
|
|
this[i + start] = bytes[i % len];
|
|
}
|
|
}
|
|
return this;
|
|
};
|
|
|
|
function checkBounds(buf, offset, byteLength2) {
|
|
validateNumber(offset, "offset");
|
|
if (buf[offset] === void 0 || buf[offset + byteLength2] === void 0) {
|
|
boundsError(offset, buf.length - (byteLength2 + 1));
|
|
}
|
|
}
|
|
|
|
function checkIntBI(value, min, max, buf, offset, byteLength2) {
|
|
if (value > max || value < min) {
|
|
const n = typeof min === "bigint" ? "n" : "";
|
|
let range;
|
|
if (byteLength2 > 3) {
|
|
if (min === 0 || min === BigInt(0)) {
|
|
range = `>= 0${n} and < 2${n} ** ${(byteLength2 + 1) * 8}${n}`;
|
|
} else {
|
|
range = `>= -(2${n} ** ${(byteLength2 + 1) * 8 - 1}${n}) and < 2 ** ${
|
|
(byteLength2 + 1) * 8 - 1
|
|
}${n}`;
|
|
}
|
|
} else {
|
|
range = `>= ${min}${n} and <= ${max}${n}`;
|
|
}
|
|
throw new codes.ERR_OUT_OF_RANGE("value", range, value);
|
|
}
|
|
checkBounds(buf, offset, byteLength2);
|
|
}
|
|
|
|
function utf8ToBytes(string, units) {
|
|
units = units || Infinity;
|
|
let codePoint;
|
|
const length = string.length;
|
|
let leadSurrogate = null;
|
|
const bytes = [];
|
|
for (let i = 0; i < length; ++i) {
|
|
codePoint = string.charCodeAt(i);
|
|
if (codePoint > 55295 && codePoint < 57344) {
|
|
if (!leadSurrogate) {
|
|
if (codePoint > 56319) {
|
|
if ((units -= 3) > -1) {
|
|
bytes.push(239, 191, 189);
|
|
}
|
|
continue;
|
|
} else if (i + 1 === length) {
|
|
if ((units -= 3) > -1) {
|
|
bytes.push(239, 191, 189);
|
|
}
|
|
continue;
|
|
}
|
|
leadSurrogate = codePoint;
|
|
continue;
|
|
}
|
|
if (codePoint < 56320) {
|
|
if ((units -= 3) > -1) {
|
|
bytes.push(239, 191, 189);
|
|
}
|
|
leadSurrogate = codePoint;
|
|
continue;
|
|
}
|
|
codePoint = (leadSurrogate - 55296 << 10 | codePoint - 56320) + 65536;
|
|
} else if (leadSurrogate) {
|
|
if ((units -= 3) > -1) {
|
|
bytes.push(239, 191, 189);
|
|
}
|
|
}
|
|
leadSurrogate = null;
|
|
if (codePoint < 128) {
|
|
if ((units -= 1) < 0) {
|
|
break;
|
|
}
|
|
bytes.push(codePoint);
|
|
} else if (codePoint < 2048) {
|
|
if ((units -= 2) < 0) {
|
|
break;
|
|
}
|
|
bytes.push(codePoint >> 6 | 192, codePoint & 63 | 128);
|
|
} else if (codePoint < 65536) {
|
|
if ((units -= 3) < 0) {
|
|
break;
|
|
}
|
|
bytes.push(
|
|
codePoint >> 12 | 224,
|
|
codePoint >> 6 & 63 | 128,
|
|
codePoint & 63 | 128,
|
|
);
|
|
} else if (codePoint < 1114112) {
|
|
if ((units -= 4) < 0) {
|
|
break;
|
|
}
|
|
bytes.push(
|
|
codePoint >> 18 | 240,
|
|
codePoint >> 12 & 63 | 128,
|
|
codePoint >> 6 & 63 | 128,
|
|
codePoint & 63 | 128,
|
|
);
|
|
} else {
|
|
throw new Error("Invalid code point");
|
|
}
|
|
}
|
|
return bytes;
|
|
}
|
|
|
|
function blitBuffer(src, dst, offset, byteLength) {
|
|
let i;
|
|
const length = byteLength === undefined ? src.length : byteLength;
|
|
for (i = 0; i < length; ++i) {
|
|
if (i + offset >= dst.length || i >= src.length) {
|
|
break;
|
|
}
|
|
dst[i + offset] = src[i];
|
|
}
|
|
return i;
|
|
}
|
|
|
|
function isInstance(obj, type) {
|
|
return obj instanceof type ||
|
|
obj != null && obj.constructor != null &&
|
|
obj.constructor.name != null && obj.constructor.name === type.name;
|
|
}
|
|
|
|
const hexSliceLookupTable = function () {
|
|
const alphabet = "0123456789abcdef";
|
|
const table = new Array(256);
|
|
for (let i = 0; i < 16; ++i) {
|
|
const i16 = i * 16;
|
|
for (let j = 0; j < 16; ++j) {
|
|
table[i16 + j] = alphabet[i] + alphabet[j];
|
|
}
|
|
}
|
|
return table;
|
|
}();
|
|
|
|
function defineBigIntMethod(fn) {
|
|
return typeof BigInt === "undefined" ? BufferBigIntNotDefined : fn;
|
|
}
|
|
|
|
function BufferBigIntNotDefined() {
|
|
throw new Error("BigInt not supported");
|
|
}
|
|
|
|
export function readUInt48LE(buf, offset = 0) {
|
|
validateNumber(offset, "offset");
|
|
const first = buf[offset];
|
|
const last = buf[offset + 5];
|
|
if (first === undefined || last === undefined) {
|
|
boundsError(offset, buf.length - 6);
|
|
}
|
|
|
|
return first +
|
|
buf[++offset] * 2 ** 8 +
|
|
buf[++offset] * 2 ** 16 +
|
|
buf[++offset] * 2 ** 24 +
|
|
(buf[++offset] + last * 2 ** 8) * 2 ** 32;
|
|
}
|
|
|
|
export function readUInt40LE(buf, offset = 0) {
|
|
validateNumber(offset, "offset");
|
|
const first = buf[offset];
|
|
const last = buf[offset + 4];
|
|
if (first === undefined || last === undefined) {
|
|
boundsError(offset, buf.length - 5);
|
|
}
|
|
|
|
return first +
|
|
buf[++offset] * 2 ** 8 +
|
|
buf[++offset] * 2 ** 16 +
|
|
buf[++offset] * 2 ** 24 +
|
|
last * 2 ** 32;
|
|
}
|
|
|
|
export function readUInt24LE(buf, offset = 0) {
|
|
validateNumber(offset, "offset");
|
|
const first = buf[offset];
|
|
const last = buf[offset + 2];
|
|
if (first === undefined || last === undefined) {
|
|
boundsError(offset, buf.length - 3);
|
|
}
|
|
|
|
return first + buf[++offset] * 2 ** 8 + last * 2 ** 16;
|
|
}
|
|
|
|
export function readUInt48BE(buf, offset = 0) {
|
|
validateNumber(offset, "offset");
|
|
const first = buf[offset];
|
|
const last = buf[offset + 5];
|
|
if (first === undefined || last === undefined) {
|
|
boundsError(offset, buf.length - 6);
|
|
}
|
|
|
|
return (first * 2 ** 8 + buf[++offset]) * 2 ** 32 +
|
|
buf[++offset] * 2 ** 24 +
|
|
buf[++offset] * 2 ** 16 +
|
|
buf[++offset] * 2 ** 8 +
|
|
last;
|
|
}
|
|
|
|
export function readUInt40BE(buf, offset = 0) {
|
|
validateNumber(offset, "offset");
|
|
const first = buf[offset];
|
|
const last = buf[offset + 4];
|
|
if (first === undefined || last === undefined) {
|
|
boundsError(offset, buf.length - 5);
|
|
}
|
|
|
|
return first * 2 ** 32 +
|
|
buf[++offset] * 2 ** 24 +
|
|
buf[++offset] * 2 ** 16 +
|
|
buf[++offset] * 2 ** 8 +
|
|
last;
|
|
}
|
|
|
|
export function readUInt24BE(buf, offset = 0) {
|
|
validateNumber(offset, "offset");
|
|
const first = buf[offset];
|
|
const last = buf[offset + 2];
|
|
if (first === undefined || last === undefined) {
|
|
boundsError(offset, buf.length - 3);
|
|
}
|
|
|
|
return first * 2 ** 16 + buf[++offset] * 2 ** 8 + last;
|
|
}
|
|
|
|
export function readUInt16BE(offset = 0) {
|
|
validateNumber(offset, "offset");
|
|
const first = this[offset];
|
|
const last = this[offset + 1];
|
|
if (first === undefined || last === undefined) {
|
|
boundsError(offset, this.length - 2);
|
|
}
|
|
|
|
return first * 2 ** 8 + last;
|
|
}
|
|
|
|
export function readUInt32BE(offset = 0) {
|
|
validateNumber(offset, "offset");
|
|
const first = this[offset];
|
|
const last = this[offset + 3];
|
|
if (first === undefined || last === undefined) {
|
|
boundsError(offset, this.length - 4);
|
|
}
|
|
|
|
return first * 2 ** 24 +
|
|
this[++offset] * 2 ** 16 +
|
|
this[++offset] * 2 ** 8 +
|
|
last;
|
|
}
|
|
|
|
export function readDoubleBackwards(buffer, offset = 0) {
|
|
validateNumber(offset, "offset");
|
|
const first = buffer[offset];
|
|
const last = buffer[offset + 7];
|
|
if (first === undefined || last === undefined) {
|
|
boundsError(offset, buffer.length - 8);
|
|
}
|
|
|
|
uInt8Float64Array[7] = first;
|
|
uInt8Float64Array[6] = buffer[++offset];
|
|
uInt8Float64Array[5] = buffer[++offset];
|
|
uInt8Float64Array[4] = buffer[++offset];
|
|
uInt8Float64Array[3] = buffer[++offset];
|
|
uInt8Float64Array[2] = buffer[++offset];
|
|
uInt8Float64Array[1] = buffer[++offset];
|
|
uInt8Float64Array[0] = last;
|
|
return float64Array[0];
|
|
}
|
|
|
|
export function readDoubleForwards(buffer, offset = 0) {
|
|
validateNumber(offset, "offset");
|
|
const first = buffer[offset];
|
|
const last = buffer[offset + 7];
|
|
if (first === undefined || last === undefined) {
|
|
boundsError(offset, buffer.length - 8);
|
|
}
|
|
|
|
uInt8Float64Array[0] = first;
|
|
uInt8Float64Array[1] = buffer[++offset];
|
|
uInt8Float64Array[2] = buffer[++offset];
|
|
uInt8Float64Array[3] = buffer[++offset];
|
|
uInt8Float64Array[4] = buffer[++offset];
|
|
uInt8Float64Array[5] = buffer[++offset];
|
|
uInt8Float64Array[6] = buffer[++offset];
|
|
uInt8Float64Array[7] = last;
|
|
return float64Array[0];
|
|
}
|
|
|
|
export function writeDoubleForwards(buffer, val, offset = 0) {
|
|
val = +val;
|
|
checkBounds(buffer, offset, 7);
|
|
|
|
float64Array[0] = val;
|
|
buffer[offset++] = uInt8Float64Array[0];
|
|
buffer[offset++] = uInt8Float64Array[1];
|
|
buffer[offset++] = uInt8Float64Array[2];
|
|
buffer[offset++] = uInt8Float64Array[3];
|
|
buffer[offset++] = uInt8Float64Array[4];
|
|
buffer[offset++] = uInt8Float64Array[5];
|
|
buffer[offset++] = uInt8Float64Array[6];
|
|
buffer[offset++] = uInt8Float64Array[7];
|
|
return offset;
|
|
}
|
|
|
|
export function writeDoubleBackwards(buffer, val, offset = 0) {
|
|
val = +val;
|
|
checkBounds(buffer, offset, 7);
|
|
|
|
float64Array[0] = val;
|
|
buffer[offset++] = uInt8Float64Array[7];
|
|
buffer[offset++] = uInt8Float64Array[6];
|
|
buffer[offset++] = uInt8Float64Array[5];
|
|
buffer[offset++] = uInt8Float64Array[4];
|
|
buffer[offset++] = uInt8Float64Array[3];
|
|
buffer[offset++] = uInt8Float64Array[2];
|
|
buffer[offset++] = uInt8Float64Array[1];
|
|
buffer[offset++] = uInt8Float64Array[0];
|
|
return offset;
|
|
}
|
|
|
|
export function readFloatBackwards(buffer, offset = 0) {
|
|
validateNumber(offset, "offset");
|
|
const first = buffer[offset];
|
|
const last = buffer[offset + 3];
|
|
if (first === undefined || last === undefined) {
|
|
boundsError(offset, buffer.length - 4);
|
|
}
|
|
|
|
uInt8Float32Array[3] = first;
|
|
uInt8Float32Array[2] = buffer[++offset];
|
|
uInt8Float32Array[1] = buffer[++offset];
|
|
uInt8Float32Array[0] = last;
|
|
return float32Array[0];
|
|
}
|
|
|
|
export function readFloatForwards(buffer, offset = 0) {
|
|
validateNumber(offset, "offset");
|
|
const first = buffer[offset];
|
|
const last = buffer[offset + 3];
|
|
if (first === undefined || last === undefined) {
|
|
boundsError(offset, buffer.length - 4);
|
|
}
|
|
|
|
uInt8Float32Array[0] = first;
|
|
uInt8Float32Array[1] = buffer[++offset];
|
|
uInt8Float32Array[2] = buffer[++offset];
|
|
uInt8Float32Array[3] = last;
|
|
return float32Array[0];
|
|
}
|
|
|
|
export function writeFloatForwards(buffer, val, offset = 0) {
|
|
val = +val;
|
|
checkBounds(buffer, offset, 3);
|
|
|
|
float32Array[0] = val;
|
|
buffer[offset++] = uInt8Float32Array[0];
|
|
buffer[offset++] = uInt8Float32Array[1];
|
|
buffer[offset++] = uInt8Float32Array[2];
|
|
buffer[offset++] = uInt8Float32Array[3];
|
|
return offset;
|
|
}
|
|
|
|
export function writeFloatBackwards(buffer, val, offset = 0) {
|
|
val = +val;
|
|
checkBounds(buffer, offset, 3);
|
|
|
|
float32Array[0] = val;
|
|
buffer[offset++] = uInt8Float32Array[3];
|
|
buffer[offset++] = uInt8Float32Array[2];
|
|
buffer[offset++] = uInt8Float32Array[1];
|
|
buffer[offset++] = uInt8Float32Array[0];
|
|
return offset;
|
|
}
|
|
|
|
export function readInt24LE(buf, offset = 0) {
|
|
validateNumber(offset, "offset");
|
|
const first = buf[offset];
|
|
const last = buf[offset + 2];
|
|
if (first === undefined || last === undefined) {
|
|
boundsError(offset, buf.length - 3);
|
|
}
|
|
|
|
const val = first + buf[++offset] * 2 ** 8 + last * 2 ** 16;
|
|
return val | (val & 2 ** 23) * 0x1fe;
|
|
}
|
|
|
|
export function readInt40LE(buf, offset = 0) {
|
|
validateNumber(offset, "offset");
|
|
const first = buf[offset];
|
|
const last = buf[offset + 4];
|
|
if (first === undefined || last === undefined) {
|
|
boundsError(offset, buf.length - 5);
|
|
}
|
|
|
|
return (last | (last & 2 ** 7) * 0x1fffffe) * 2 ** 32 +
|
|
first +
|
|
buf[++offset] * 2 ** 8 +
|
|
buf[++offset] * 2 ** 16 +
|
|
buf[++offset] * 2 ** 24;
|
|
}
|
|
|
|
export function readInt48LE(buf, offset = 0) {
|
|
validateNumber(offset, "offset");
|
|
const first = buf[offset];
|
|
const last = buf[offset + 5];
|
|
if (first === undefined || last === undefined) {
|
|
boundsError(offset, buf.length - 6);
|
|
}
|
|
|
|
const val = buf[offset + 4] + last * 2 ** 8;
|
|
return (val | (val & 2 ** 15) * 0x1fffe) * 2 ** 32 +
|
|
first +
|
|
buf[++offset] * 2 ** 8 +
|
|
buf[++offset] * 2 ** 16 +
|
|
buf[++offset] * 2 ** 24;
|
|
}
|
|
|
|
export function readInt24BE(buf, offset = 0) {
|
|
validateNumber(offset, "offset");
|
|
const first = buf[offset];
|
|
const last = buf[offset + 2];
|
|
if (first === undefined || last === undefined) {
|
|
boundsError(offset, buf.length - 3);
|
|
}
|
|
|
|
const val = first * 2 ** 16 + buf[++offset] * 2 ** 8 + last;
|
|
return val | (val & 2 ** 23) * 0x1fe;
|
|
}
|
|
|
|
export function readInt48BE(buf, offset = 0) {
|
|
validateNumber(offset, "offset");
|
|
const first = buf[offset];
|
|
const last = buf[offset + 5];
|
|
if (first === undefined || last === undefined) {
|
|
boundsError(offset, buf.length - 6);
|
|
}
|
|
|
|
const val = buf[++offset] + first * 2 ** 8;
|
|
return (val | (val & 2 ** 15) * 0x1fffe) * 2 ** 32 +
|
|
buf[++offset] * 2 ** 24 +
|
|
buf[++offset] * 2 ** 16 +
|
|
buf[++offset] * 2 ** 8 +
|
|
last;
|
|
}
|
|
|
|
export function readInt40BE(buf, offset = 0) {
|
|
validateNumber(offset, "offset");
|
|
const first = buf[offset];
|
|
const last = buf[offset + 4];
|
|
if (first === undefined || last === undefined) {
|
|
boundsError(offset, buf.length - 5);
|
|
}
|
|
|
|
return (first | (first & 2 ** 7) * 0x1fffffe) * 2 ** 32 +
|
|
buf[++offset] * 2 ** 24 +
|
|
buf[++offset] * 2 ** 16 +
|
|
buf[++offset] * 2 ** 8 +
|
|
last;
|
|
}
|
|
|
|
export function byteLengthUtf8(str) {
|
|
return utf8Encoder.encode(str).length;
|
|
}
|
|
|
|
function base64ByteLength(str, bytes) {
|
|
// Handle padding
|
|
if (str.charCodeAt(bytes - 1) === 0x3D) {
|
|
bytes--;
|
|
}
|
|
if (bytes > 1 && str.charCodeAt(bytes - 1) === 0x3D) {
|
|
bytes--;
|
|
}
|
|
|
|
// Base64 ratio: 3/4
|
|
return (bytes * 3) >>> 2;
|
|
}
|
|
|
|
export const encodingsMap = Object.create(null);
|
|
for (let i = 0; i < encodings.length; ++i) {
|
|
encodingsMap[encodings[i]] = i;
|
|
}
|
|
|
|
export const encodingOps = {
|
|
ascii: {
|
|
byteLength: (string) => string.length,
|
|
encoding: "ascii",
|
|
encodingVal: encodingsMap.ascii,
|
|
indexOf: (buf, val, byteOffset, dir) =>
|
|
indexOfBuffer(
|
|
buf,
|
|
asciiToBytes(val),
|
|
byteOffset,
|
|
encodingsMap.ascii,
|
|
dir,
|
|
),
|
|
slice: (buf, start, end) => buf.asciiSlice(start, end),
|
|
write: (buf, string, offset, len) => buf.asciiWrite(string, offset, len),
|
|
},
|
|
base64: {
|
|
byteLength: (string) => base64ByteLength(string, string.length),
|
|
encoding: "base64",
|
|
encodingVal: encodingsMap.base64,
|
|
indexOf: (buf, val, byteOffset, dir) =>
|
|
indexOfBuffer(
|
|
buf,
|
|
base64ToBytes(val),
|
|
byteOffset,
|
|
encodingsMap.base64,
|
|
dir,
|
|
),
|
|
slice: (buf, start, end) => buf.base64Slice(start, end),
|
|
write: (buf, string, offset, len) => buf.base64Write(string, offset, len),
|
|
},
|
|
base64url: {
|
|
byteLength: (string) => base64ByteLength(string, string.length),
|
|
encoding: "base64url",
|
|
encodingVal: encodingsMap.base64url,
|
|
indexOf: (buf, val, byteOffset, dir) =>
|
|
indexOfBuffer(
|
|
buf,
|
|
base64UrlToBytes(val),
|
|
byteOffset,
|
|
encodingsMap.base64url,
|
|
dir,
|
|
),
|
|
slice: (buf, start, end) => buf.base64urlSlice(start, end),
|
|
write: (buf, string, offset, len) =>
|
|
buf.base64urlWrite(string, offset, len),
|
|
},
|
|
hex: {
|
|
byteLength: (string) => string.length >>> 1,
|
|
encoding: "hex",
|
|
encodingVal: encodingsMap.hex,
|
|
indexOf: (buf, val, byteOffset, dir) =>
|
|
indexOfBuffer(
|
|
buf,
|
|
hexToBytes(val),
|
|
byteOffset,
|
|
encodingsMap.hex,
|
|
dir,
|
|
),
|
|
slice: (buf, start, end) => buf.hexSlice(start, end),
|
|
write: (buf, string, offset, len) => buf.hexWrite(string, offset, len),
|
|
},
|
|
latin1: {
|
|
byteLength: (string) => string.length,
|
|
encoding: "latin1",
|
|
encodingVal: encodingsMap.latin1,
|
|
indexOf: (buf, val, byteOffset, dir) =>
|
|
indexOfBuffer(
|
|
buf,
|
|
asciiToBytes(val),
|
|
byteOffset,
|
|
encodingsMap.latin1,
|
|
dir,
|
|
),
|
|
slice: (buf, start, end) => buf.latin1Slice(start, end),
|
|
write: (buf, string, offset, len) => buf.latin1Write(string, offset, len),
|
|
},
|
|
ucs2: {
|
|
byteLength: (string) => string.length * 2,
|
|
encoding: "ucs2",
|
|
encodingVal: encodingsMap.utf16le,
|
|
indexOf: (buf, val, byteOffset, dir) =>
|
|
indexOfBuffer(
|
|
buf,
|
|
utf16leToBytes(val),
|
|
byteOffset,
|
|
encodingsMap.utf16le,
|
|
dir,
|
|
),
|
|
slice: (buf, start, end) => buf.ucs2Slice(start, end),
|
|
write: (buf, string, offset, len) => buf.ucs2Write(string, offset, len),
|
|
},
|
|
utf8: {
|
|
byteLength: byteLengthUtf8,
|
|
encoding: "utf8",
|
|
encodingVal: encodingsMap.utf8,
|
|
indexOf: (buf, val, byteOffset, dir) =>
|
|
indexOfBuffer(
|
|
buf,
|
|
utf8Encoder.encode(val),
|
|
byteOffset,
|
|
encodingsMap.utf8,
|
|
dir,
|
|
),
|
|
slice: (buf, start, end) => buf.utf8Slice(start, end),
|
|
write: (buf, string, offset, len) => buf.utf8Write(string, offset, len),
|
|
},
|
|
utf16le: {
|
|
byteLength: (string) => string.length * 2,
|
|
encoding: "utf16le",
|
|
encodingVal: encodingsMap.utf16le,
|
|
indexOf: (buf, val, byteOffset, dir) =>
|
|
indexOfBuffer(
|
|
buf,
|
|
utf16leToBytes(val),
|
|
byteOffset,
|
|
encodingsMap.utf16le,
|
|
dir,
|
|
),
|
|
slice: (buf, start, end) => buf.ucs2Slice(start, end),
|
|
write: (buf, string, offset, len) => buf.ucs2Write(string, offset, len),
|
|
},
|
|
};
|
|
|
|
export function getEncodingOps(encoding) {
|
|
encoding = String(encoding).toLowerCase();
|
|
switch (encoding.length) {
|
|
case 4:
|
|
if (encoding === "utf8") return encodingOps.utf8;
|
|
if (encoding === "ucs2") return encodingOps.ucs2;
|
|
break;
|
|
case 5:
|
|
if (encoding === "utf-8") return encodingOps.utf8;
|
|
if (encoding === "ascii") return encodingOps.ascii;
|
|
if (encoding === "ucs-2") return encodingOps.ucs2;
|
|
break;
|
|
case 7:
|
|
if (encoding === "utf16le") {
|
|
return encodingOps.utf16le;
|
|
}
|
|
break;
|
|
case 8:
|
|
if (encoding === "utf-16le") {
|
|
return encodingOps.utf16le;
|
|
}
|
|
break;
|
|
// deno-lint-ignore no-fallthrough
|
|
case 6:
|
|
if (encoding === "latin1" || encoding === "binary") {
|
|
return encodingOps.latin1;
|
|
}
|
|
if (encoding === "base64") return encodingOps.base64;
|
|
case 3:
|
|
if (encoding === "hex") {
|
|
return encodingOps.hex;
|
|
}
|
|
break;
|
|
case 9:
|
|
if (encoding === "base64url") {
|
|
return encodingOps.base64url;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
export function _copyActual(
|
|
source,
|
|
target,
|
|
targetStart,
|
|
sourceStart,
|
|
sourceEnd,
|
|
) {
|
|
if (sourceEnd - sourceStart > target.length - targetStart) {
|
|
sourceEnd = sourceStart + target.length - targetStart;
|
|
}
|
|
|
|
let nb = sourceEnd - sourceStart;
|
|
const sourceLen = source.length - sourceStart;
|
|
if (nb > sourceLen) {
|
|
nb = sourceLen;
|
|
}
|
|
|
|
if (sourceStart !== 0 || sourceEnd < source.length) {
|
|
source = new Uint8Array(source.buffer, source.byteOffset + sourceStart, nb);
|
|
}
|
|
|
|
target.set(source, targetStart);
|
|
|
|
return nb;
|
|
}
|
|
|
|
export function boundsError(value, length, type) {
|
|
if (Math.floor(value) !== value) {
|
|
validateNumber(value, type);
|
|
throw new codes.ERR_OUT_OF_RANGE(type || "offset", "an integer", value);
|
|
}
|
|
|
|
if (length < 0) {
|
|
throw new codes.ERR_BUFFER_OUT_OF_BOUNDS();
|
|
}
|
|
|
|
throw new codes.ERR_OUT_OF_RANGE(
|
|
type || "offset",
|
|
`>= ${type ? 1 : 0} and <= ${length}`,
|
|
value,
|
|
);
|
|
}
|
|
|
|
export function validateNumber(value, name) {
|
|
if (typeof value !== "number") {
|
|
throw new codes.ERR_INVALID_ARG_TYPE(name, "number", value);
|
|
}
|
|
}
|
|
|
|
function checkInt(value, min, max, buf, offset, byteLength) {
|
|
if (value > max || value < min) {
|
|
const n = typeof min === "bigint" ? "n" : "";
|
|
let range;
|
|
if (byteLength > 3) {
|
|
if (min === 0 || min === 0n) {
|
|
range = `>= 0${n} and < 2${n} ** ${(byteLength + 1) * 8}${n}`;
|
|
} else {
|
|
range = `>= -(2${n} ** ${(byteLength + 1) * 8 - 1}${n}) and ` +
|
|
`< 2${n} ** ${(byteLength + 1) * 8 - 1}${n}`;
|
|
}
|
|
} else {
|
|
range = `>= ${min}${n} and <= ${max}${n}`;
|
|
}
|
|
throw new codes.ERR_OUT_OF_RANGE("value", range, value);
|
|
}
|
|
checkBounds(buf, offset, byteLength);
|
|
}
|
|
|
|
export function toInteger(n, defaultVal) {
|
|
n = +n;
|
|
if (
|
|
!Number.isNaN(n) &&
|
|
n >= Number.MIN_SAFE_INTEGER &&
|
|
n <= Number.MAX_SAFE_INTEGER
|
|
) {
|
|
return ((n % 1) === 0 ? n : Math.floor(n));
|
|
}
|
|
return defaultVal;
|
|
}
|
|
|
|
// deno-lint-ignore camelcase
|
|
export function writeU_Int8(buf, value, offset, min, max) {
|
|
value = +value;
|
|
validateNumber(offset, "offset");
|
|
if (value > max || value < min) {
|
|
throw new codes.ERR_OUT_OF_RANGE("value", `>= ${min} and <= ${max}`, value);
|
|
}
|
|
if (buf[offset] === undefined) {
|
|
boundsError(offset, buf.length - 1);
|
|
}
|
|
|
|
buf[offset] = value;
|
|
return offset + 1;
|
|
}
|
|
|
|
// deno-lint-ignore camelcase
|
|
export function writeU_Int16BE(buf, value, offset, min, max) {
|
|
value = +value;
|
|
checkInt(value, min, max, buf, offset, 1);
|
|
|
|
buf[offset++] = value >>> 8;
|
|
buf[offset++] = value;
|
|
return offset;
|
|
}
|
|
|
|
export function _writeUInt32LE(buf, value, offset, min, max) {
|
|
value = +value;
|
|
checkInt(value, min, max, buf, offset, 3);
|
|
|
|
buf[offset++] = value;
|
|
value = value >>> 8;
|
|
buf[offset++] = value;
|
|
value = value >>> 8;
|
|
buf[offset++] = value;
|
|
value = value >>> 8;
|
|
buf[offset++] = value;
|
|
return offset;
|
|
}
|
|
|
|
// deno-lint-ignore camelcase
|
|
export function writeU_Int16LE(buf, value, offset, min, max) {
|
|
value = +value;
|
|
checkInt(value, min, max, buf, offset, 1);
|
|
|
|
buf[offset++] = value;
|
|
buf[offset++] = value >>> 8;
|
|
return offset;
|
|
}
|
|
|
|
export function _writeUInt32BE(buf, value, offset, min, max) {
|
|
value = +value;
|
|
checkInt(value, min, max, buf, offset, 3);
|
|
|
|
buf[offset + 3] = value;
|
|
value = value >>> 8;
|
|
buf[offset + 2] = value;
|
|
value = value >>> 8;
|
|
buf[offset + 1] = value;
|
|
value = value >>> 8;
|
|
buf[offset] = value;
|
|
return offset + 4;
|
|
}
|
|
|
|
// deno-lint-ignore camelcase
|
|
export function writeU_Int48BE(buf, value, offset, min, max) {
|
|
value = +value;
|
|
checkInt(value, min, max, buf, offset, 5);
|
|
|
|
const newVal = Math.floor(value * 2 ** -32);
|
|
buf[offset++] = newVal >>> 8;
|
|
buf[offset++] = newVal;
|
|
buf[offset + 3] = value;
|
|
value = value >>> 8;
|
|
buf[offset + 2] = value;
|
|
value = value >>> 8;
|
|
buf[offset + 1] = value;
|
|
value = value >>> 8;
|
|
buf[offset] = value;
|
|
return offset + 4;
|
|
}
|
|
|
|
// deno-lint-ignore camelcase
|
|
export function writeU_Int40BE(buf, value, offset, min, max) {
|
|
value = +value;
|
|
checkInt(value, min, max, buf, offset, 4);
|
|
|
|
buf[offset++] = Math.floor(value * 2 ** -32);
|
|
buf[offset + 3] = value;
|
|
value = value >>> 8;
|
|
buf[offset + 2] = value;
|
|
value = value >>> 8;
|
|
buf[offset + 1] = value;
|
|
value = value >>> 8;
|
|
buf[offset] = value;
|
|
return offset + 4;
|
|
}
|
|
|
|
// deno-lint-ignore camelcase
|
|
export function writeU_Int32BE(buf, value, offset, min, max) {
|
|
value = +value;
|
|
checkInt(value, min, max, buf, offset, 3);
|
|
|
|
buf[offset + 3] = value;
|
|
value = value >>> 8;
|
|
buf[offset + 2] = value;
|
|
value = value >>> 8;
|
|
buf[offset + 1] = value;
|
|
value = value >>> 8;
|
|
buf[offset] = value;
|
|
return offset + 4;
|
|
}
|
|
|
|
// deno-lint-ignore camelcase
|
|
export function writeU_Int24BE(buf, value, offset, min, max) {
|
|
value = +value;
|
|
checkInt(value, min, max, buf, offset, 2);
|
|
|
|
buf[offset + 2] = value;
|
|
value = value >>> 8;
|
|
buf[offset + 1] = value;
|
|
value = value >>> 8;
|
|
buf[offset] = value;
|
|
return offset + 3;
|
|
}
|
|
|
|
export function validateOffset(
|
|
value,
|
|
name,
|
|
min = 0,
|
|
max = Number.MAX_SAFE_INTEGER,
|
|
) {
|
|
if (typeof value !== "number") {
|
|
throw new codes.ERR_INVALID_ARG_TYPE(name, "number", value);
|
|
}
|
|
if (!Number.isInteger(value)) {
|
|
throw new codes.ERR_OUT_OF_RANGE(name, "an integer", value);
|
|
}
|
|
if (value < min || value > max) {
|
|
throw new codes.ERR_OUT_OF_RANGE(name, `>= ${min} && <= ${max}`, value);
|
|
}
|
|
}
|
|
|
|
// deno-lint-ignore camelcase
|
|
export function writeU_Int48LE(buf, value, offset, min, max) {
|
|
value = +value;
|
|
checkInt(value, min, max, buf, offset, 5);
|
|
|
|
const newVal = Math.floor(value * 2 ** -32);
|
|
buf[offset++] = value;
|
|
value = value >>> 8;
|
|
buf[offset++] = value;
|
|
value = value >>> 8;
|
|
buf[offset++] = value;
|
|
value = value >>> 8;
|
|
buf[offset++] = value;
|
|
buf[offset++] = newVal;
|
|
buf[offset++] = newVal >>> 8;
|
|
return offset;
|
|
}
|
|
|
|
// deno-lint-ignore camelcase
|
|
export function writeU_Int40LE(buf, value, offset, min, max) {
|
|
value = +value;
|
|
checkInt(value, min, max, buf, offset, 4);
|
|
|
|
const newVal = value;
|
|
buf[offset++] = value;
|
|
value = value >>> 8;
|
|
buf[offset++] = value;
|
|
value = value >>> 8;
|
|
buf[offset++] = value;
|
|
value = value >>> 8;
|
|
buf[offset++] = value;
|
|
buf[offset++] = Math.floor(newVal * 2 ** -32);
|
|
return offset;
|
|
}
|
|
|
|
// deno-lint-ignore camelcase
|
|
export function writeU_Int32LE(buf, value, offset, min, max) {
|
|
value = +value;
|
|
checkInt(value, min, max, buf, offset, 3);
|
|
|
|
buf[offset++] = value;
|
|
value = value >>> 8;
|
|
buf[offset++] = value;
|
|
value = value >>> 8;
|
|
buf[offset++] = value;
|
|
value = value >>> 8;
|
|
buf[offset++] = value;
|
|
return offset;
|
|
}
|
|
|
|
// deno-lint-ignore camelcase
|
|
export function writeU_Int24LE(buf, value, offset, min, max) {
|
|
value = +value;
|
|
checkInt(value, min, max, buf, offset, 2);
|
|
|
|
buf[offset++] = value;
|
|
value = value >>> 8;
|
|
buf[offset++] = value;
|
|
value = value >>> 8;
|
|
buf[offset++] = value;
|
|
return offset;
|
|
}
|
|
|
|
export default {
|
|
atob,
|
|
btoa,
|
|
Blob,
|
|
Buffer,
|
|
constants,
|
|
kMaxLength,
|
|
kStringMaxLength,
|
|
SlowBuffer,
|
|
};
|