mirror of
https://github.com/denoland/deno.git
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2074 lines
74 KiB
TypeScript
2074 lines
74 KiB
TypeScript
// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
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// Copyright DefinitelyTyped contributors. All rights reserved. MIT license.
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/**
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* One of many allowed encodings for the buffer content
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* - ascii
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* - base64
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* - base64url
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* - binary
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* - hex
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* - latin1
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* - ucs-2
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* - ucs2
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* - utf-8
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* - utf16le
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* - utf8
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*/
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type Encoding = unknown;
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type WithImplicitCoercion<T> =
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| T
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| {
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valueOf(): T;
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};
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/**
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* `Buffer` objects are used to represent a fixed-length sequence of bytes. Many
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* Node.js APIs support `Buffer`s.
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*
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* The `Buffer` class is a subclass of JavaScript's [`Uint8Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Uint8Array) class and
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* extends it with methods that cover additional use cases. Node.js APIs accept
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* plain [`Uint8Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Uint8Array) s wherever `Buffer`s are supported as well.
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*
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* While the `Buffer` class is available within the global scope, it is still
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* recommended to explicitly reference it via an import or require statement.
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*
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* ```js
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* import { Buffer } from "ext:deno_node/internal/buffer";
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*
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* // Creates a zero-filled Buffer of length 10.
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* const buf1 = Buffer.alloc(10);
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*
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* // Creates a Buffer of length 10,
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* // filled with bytes which all have the value `1`.
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* const buf2 = Buffer.alloc(10, 1);
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*
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* // Creates an uninitialized buffer of length 10.
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* // This is faster than calling Buffer.alloc() but the returned
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* // Buffer instance might contain old data that needs to be
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* // overwritten using fill(), write(), or other functions that fill the Buffer's
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* // contents.
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* const buf3 = Buffer.allocUnsafe(10);
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*
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* // Creates a Buffer containing the bytes [1, 2, 3].
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* const buf4 = Buffer.from([1, 2, 3]);
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*
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* // Creates a Buffer containing the bytes [1, 1, 1, 1] – the entries
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* // are all truncated using `(value & 255)` to fit into the range 0–255.
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* const buf5 = Buffer.from([257, 257.5, -255, '1']);
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*
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* // Creates a Buffer containing the UTF-8-encoded bytes for the string 'tést':
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* // [0x74, 0xc3, 0xa9, 0x73, 0x74] (in hexadecimal notation)
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* // [116, 195, 169, 115, 116] (in decimal notation)
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* const buf6 = Buffer.from('tést');
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*
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* // Creates a Buffer containing the Latin-1 bytes [0x74, 0xe9, 0x73, 0x74].
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* const buf7 = Buffer.from('tést', 'latin1');
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* ```
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* @see [source](https://github.com/nodejs/node/blob/v16.9.0/lib/buffer.js)
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*/
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export class Buffer extends Uint8Array {
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/**
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* Allocates a new buffer containing the given {str}.
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*
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* @param str String to store in buffer.
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* @param encoding encoding to use, optional. Default is 'utf8'
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* @deprecated since v10.0.0 - Use `Buffer.from(string[, encoding])` instead.
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*/
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constructor(str: string, encoding?: Encoding);
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/**
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* Allocates a new buffer of {size} octets.
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*
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* @param size count of octets to allocate.
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* @deprecated since v10.0.0 - Use `Buffer.alloc()` instead (also see `Buffer.allocUnsafe()`).
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*/
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constructor(size: number);
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/**
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* Allocates a new buffer containing the given {array} of octets.
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*
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* @param array The octets to store.
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* @deprecated since v10.0.0 - Use `Buffer.from(array)` instead.
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*/
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constructor(array: Uint8Array);
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/**
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* Produces a Buffer backed by the same allocated memory as
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* the given {ArrayBuffer}/{SharedArrayBuffer}.
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*
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* @param arrayBuffer The ArrayBuffer with which to share memory.
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* @deprecated since v10.0.0 - Use `Buffer.from(arrayBuffer[, byteOffset[, length]])` instead.
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*/
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constructor(arrayBuffer: ArrayBuffer | SharedArrayBuffer);
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/**
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* Allocates a new buffer containing the given {array} of octets.
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*
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* @param array The octets to store.
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* @deprecated since v10.0.0 - Use `Buffer.from(array)` instead.
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*/
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constructor(array: ReadonlyArray<unknown>);
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/**
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* Copies the passed {buffer} data onto a new {Buffer} instance.
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*
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* @param buffer The buffer to copy.
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* @deprecated since v10.0.0 - Use `Buffer.from(buffer)` instead.
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*/
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constructor(buffer: Buffer);
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/**
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* Allocates a new `Buffer` using an `array` of bytes in the range `0` – `255`.
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* Array entries outside that range will be truncated to fit into it.
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*
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* ```js
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* import { Buffer } from "ext:deno_node/internal/buffer";
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*
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* // Creates a new Buffer containing the UTF-8 bytes of the string 'buffer'.
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* const buf = Buffer.from([0x62, 0x75, 0x66, 0x66, 0x65, 0x72]);
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* ```
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*
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* A `TypeError` will be thrown if `array` is not an `Array` or another type
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* appropriate for `Buffer.from()` variants.
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*
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* `Buffer.from(array)` and `Buffer.from(string)` may also use the internal`Buffer` pool like `Buffer.allocUnsafe()` does.
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* @since v5.10.0
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*/
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static from(
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arrayBuffer: WithImplicitCoercion<ArrayBuffer | SharedArrayBuffer>,
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byteOffset?: number,
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length?: number,
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): Buffer;
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/**
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* Creates a new Buffer using the passed {data}
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* @param data data to create a new Buffer
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*/
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static from(data: Uint8Array | ReadonlyArray<number>): Buffer;
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static from(
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data: WithImplicitCoercion<Uint8Array | ReadonlyArray<number> | string>,
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): Buffer;
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/**
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* Creates a new Buffer containing the given JavaScript string {str}.
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* If provided, the {encoding} parameter identifies the character encoding.
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* If not provided, {encoding} defaults to 'utf8'.
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*/
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static from(
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str:
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| WithImplicitCoercion<string>
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| {
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[Symbol.toPrimitive](hint: "string"): string;
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},
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encoding?: Encoding,
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): Buffer;
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/**
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* Creates a new Buffer using the passed {data}
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* @param values to create a new Buffer
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*/
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static of(...items: number[]): Buffer;
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/**
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* Returns `true` if `obj` is a `Buffer`, `false` otherwise.
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*
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* ```js
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* import { Buffer } from "ext:deno_node/internal/buffer";
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*
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* Buffer.isBuffer(Buffer.alloc(10)); // true
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* Buffer.isBuffer(Buffer.from('foo')); // true
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* Buffer.isBuffer('a string'); // false
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* Buffer.isBuffer([]); // false
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* Buffer.isBuffer(new Uint8Array(1024)); // false
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* ```
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* @since v0.1.101
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*/
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static isBuffer(obj: unknown): obj is Buffer;
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/**
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* Returns `true` if `encoding` is the name of a supported character encoding,
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* or `false` otherwise.
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*
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* ```js
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* import { Buffer } from "ext:deno_node/internal/buffer";
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*
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* console.log(Buffer.isEncoding('utf8'));
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* // Prints: true
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*
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* console.log(Buffer.isEncoding('hex'));
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* // Prints: true
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*
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* console.log(Buffer.isEncoding('utf/8'));
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* // Prints: false
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*
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* console.log(Buffer.isEncoding(''));
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* // Prints: false
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* ```
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* @since v0.9.1
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* @param encoding A character encoding name to check.
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*/
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static isEncoding(encoding: string): boolean;
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/**
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* Returns the byte length of a string when encoded using `encoding`.
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* This is not the same as [`String.prototype.length`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/length), which does not account
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* for the encoding that is used to convert the string into bytes.
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*
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* For `'base64'`, `'base64url'`, and `'hex'`, this function assumes valid input.
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* For strings that contain non-base64/hex-encoded data (e.g. whitespace), the
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* return value might be greater than the length of a `Buffer` created from the
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* string.
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*
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* ```js
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* import { Buffer } from "ext:deno_node/internal/buffer";
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*
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* const str = '\u00bd + \u00bc = \u00be';
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*
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* console.log(`${str}: ${str.length} characters, ` +
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* `${Buffer.byteLength(str, 'utf8')} bytes`);
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* // Prints: ½ + ¼ = ¾: 9 characters, 12 bytes
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* ```
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*
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* When `string` is a
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* `Buffer`/[`DataView`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/DataView)/[`TypedArray`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/-
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* Reference/Global_Objects/TypedArray)/[`ArrayBuffer`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer)/[`SharedArrayBuffer`](https://develop-
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* er.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer), the byte length as reported by `.byteLength`is returned.
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* @since v0.1.90
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* @param string A value to calculate the length of.
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* @param [encoding='utf8'] If `string` is a string, this is its encoding.
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* @return The number of bytes contained within `string`.
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*/
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static byteLength(
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string:
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| string
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| ArrayBufferView
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| ArrayBuffer
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| SharedArrayBuffer,
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encoding?: Encoding,
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): number;
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/**
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* Returns a new `Buffer` which is the result of concatenating all the `Buffer`instances in the `list` together.
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*
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* If the list has no items, or if the `totalLength` is 0, then a new zero-length`Buffer` is returned.
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*
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* If `totalLength` is not provided, it is calculated from the `Buffer` instances
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* in `list` by adding their lengths.
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*
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* If `totalLength` is provided, it is coerced to an unsigned integer. If the
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* combined length of the `Buffer`s in `list` exceeds `totalLength`, the result is
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* truncated to `totalLength`.
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*
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* ```js
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* import { Buffer } from "ext:deno_node/internal/buffer";
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*
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* // Create a single `Buffer` from a list of three `Buffer` instances.
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*
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* const buf1 = Buffer.alloc(10);
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* const buf2 = Buffer.alloc(14);
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* const buf3 = Buffer.alloc(18);
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* const totalLength = buf1.length + buf2.length + buf3.length;
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*
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* console.log(totalLength);
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* // Prints: 42
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*
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* const bufA = Buffer.concat([buf1, buf2, buf3], totalLength);
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*
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* console.log(bufA);
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* // Prints: <Buffer 00 00 00 00 ...>
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* console.log(bufA.length);
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* // Prints: 42
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* ```
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*
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* `Buffer.concat()` may also use the internal `Buffer` pool like `Buffer.allocUnsafe()` does.
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* @since v0.7.11
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* @param list List of `Buffer` or {@link Uint8Array} instances to concatenate.
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* @param totalLength Total length of the `Buffer` instances in `list` when concatenated.
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*/
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static concat(
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list: ReadonlyArray<Uint8Array>,
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totalLength?: number,
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): Buffer;
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/**
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* Compares `buf1` to `buf2`, typically for the purpose of sorting arrays of`Buffer` instances. This is equivalent to calling `buf1.compare(buf2)`.
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*
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* ```js
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* import { Buffer } from "ext:deno_node/internal/buffer";
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*
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* const buf1 = Buffer.from('1234');
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* const buf2 = Buffer.from('0123');
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* const arr = [buf1, buf2];
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*
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* console.log(arr.sort(Buffer.compare));
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* // Prints: [ <Buffer 30 31 32 33>, <Buffer 31 32 33 34> ]
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* // (This result is equal to: [buf2, buf1].)
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* ```
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* @since v0.11.13
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* @return Either `-1`, `0`, or `1`, depending on the result of the comparison. See `compare` for details.
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*/
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static compare(buf1: Uint8Array, buf2: Uint8Array): number;
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/**
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* Allocates a new `Buffer` of `size` bytes. If `fill` is `undefined`, the`Buffer` will be zero-filled.
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*
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* ```js
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* import { Buffer } from "ext:deno_node/internal/buffer";
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*
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* const buf = Buffer.alloc(5);
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*
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* console.log(buf);
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* // Prints: <Buffer 00 00 00 00 00>
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* ```
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*
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* If `size` is larger than {@link constants.MAX_LENGTH} or smaller than 0, `ERR_INVALID_ARG_VALUE` is thrown.
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*
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* If `fill` is specified, the allocated `Buffer` will be initialized by calling `buf.fill(fill)`.
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*
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* ```js
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* import { Buffer } from "ext:deno_node/internal/buffer";
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*
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* const buf = Buffer.alloc(5, 'a');
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*
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* console.log(buf);
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* // Prints: <Buffer 61 61 61 61 61>
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* ```
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*
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* If both `fill` and `encoding` are specified, the allocated `Buffer` will be
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* initialized by calling `buf.fill(fill, encoding)`.
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*
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* ```js
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* import { Buffer } from "ext:deno_node/internal/buffer";
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*
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* const buf = Buffer.alloc(11, 'aGVsbG8gd29ybGQ=', 'base64');
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*
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* console.log(buf);
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* // Prints: <Buffer 68 65 6c 6c 6f 20 77 6f 72 6c 64>
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* ```
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*
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* Calling `Buffer.alloc()` can be measurably slower than the alternative `Buffer.allocUnsafe()` but ensures that the newly created `Buffer` instance
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* contents will never contain sensitive data from previous allocations, including
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* data that might not have been allocated for `Buffer`s.
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*
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* A `TypeError` will be thrown if `size` is not a number.
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* @since v5.10.0
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* @param size The desired length of the new `Buffer`.
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* @param [fill=0] A value to pre-fill the new `Buffer` with.
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* @param [encoding='utf8'] If `fill` is a string, this is its encoding.
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*/
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static alloc(
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size: number,
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fill?: string | Uint8Array | number,
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encoding?: Encoding,
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): Buffer;
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/**
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* Allocates a new `Buffer` of `size` bytes. If `size` is larger than {@link constants.MAX_LENGTH} or smaller than 0, `ERR_INVALID_ARG_VALUE` is thrown.
|
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*
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* The underlying memory for `Buffer` instances created in this way is _not_
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* _initialized_. The contents of the newly created `Buffer` are unknown and_may contain sensitive data_. Use `Buffer.alloc()` instead to initialize`Buffer` instances with zeroes.
|
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*
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* ```js
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* import { Buffer } from "ext:deno_node/internal/buffer";
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*
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* const buf = Buffer.allocUnsafe(10);
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*
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* console.log(buf);
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* // Prints (contents may vary): <Buffer a0 8b 28 3f 01 00 00 00 50 32>
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*
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* buf.fill(0);
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*
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* console.log(buf);
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* // Prints: <Buffer 00 00 00 00 00 00 00 00 00 00>
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* ```
|
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*
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* A `TypeError` will be thrown if `size` is not a number.
|
||
*
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* The `Buffer` module pre-allocates an internal `Buffer` instance of
|
||
* size `Buffer.poolSize` that is used as a pool for the fast allocation of new`Buffer` instances created using `Buffer.allocUnsafe()`,`Buffer.from(array)`, `Buffer.concat()`, and the
|
||
* deprecated`new Buffer(size)` constructor only when `size` is less than or equal
|
||
* to `Buffer.poolSize >> 1` (floor of `Buffer.poolSize` divided by two).
|
||
*
|
||
* Use of this pre-allocated internal memory pool is a key difference between
|
||
* calling `Buffer.alloc(size, fill)` vs. `Buffer.allocUnsafe(size).fill(fill)`.
|
||
* Specifically, `Buffer.alloc(size, fill)` will _never_ use the internal `Buffer`pool, while `Buffer.allocUnsafe(size).fill(fill)`_will_ use the internal`Buffer` pool if `size` is less
|
||
* than or equal to half `Buffer.poolSize`. The
|
||
* difference is subtle but can be important when an application requires the
|
||
* additional performance that `Buffer.allocUnsafe()` provides.
|
||
* @since v5.10.0
|
||
* @param size The desired length of the new `Buffer`.
|
||
*/
|
||
static allocUnsafe(size: number): Buffer;
|
||
/**
|
||
* Allocates a new `Buffer` of `size` bytes. If `size` is larger than {@link constants.MAX_LENGTH} or smaller than 0, `ERR_INVALID_ARG_VALUE` is thrown. A zero-length `Buffer` is created
|
||
* if `size` is 0.
|
||
*
|
||
* The underlying memory for `Buffer` instances created in this way is _not_
|
||
* _initialized_. The contents of the newly created `Buffer` are unknown and_may contain sensitive data_. Use `buf.fill(0)` to initialize
|
||
* such `Buffer` instances with zeroes.
|
||
*
|
||
* When using `Buffer.allocUnsafe()` to allocate new `Buffer` instances,
|
||
* allocations under 4 KB are sliced from a single pre-allocated `Buffer`. This
|
||
* allows applications to avoid the garbage collection overhead of creating many
|
||
* individually allocated `Buffer` instances. This approach improves both
|
||
* performance and memory usage by eliminating the need to track and clean up as
|
||
* many individual `ArrayBuffer` objects.
|
||
*
|
||
* However, in the case where a developer may need to retain a small chunk of
|
||
* memory from a pool for an indeterminate amount of time, it may be appropriate
|
||
* to create an un-pooled `Buffer` instance using `Buffer.allocUnsafeSlow()` and
|
||
* then copying out the relevant bits.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* // Need to keep around a few small chunks of memory.
|
||
* const store = [];
|
||
*
|
||
* socket.on('readable', () => {
|
||
* let data;
|
||
* while (null !== (data = readable.read())) {
|
||
* // Allocate for retained data.
|
||
* const sb = Buffer.allocUnsafeSlow(10);
|
||
*
|
||
* // Copy the data into the new allocation.
|
||
* data.copy(sb, 0, 0, 10);
|
||
*
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||
* store.push(sb);
|
||
* }
|
||
* });
|
||
* ```
|
||
*
|
||
* A `TypeError` will be thrown if `size` is not a number.
|
||
* @since v5.12.0
|
||
* @param size The desired length of the new `Buffer`.
|
||
*/
|
||
static allocUnsafeSlow(size: number): Buffer;
|
||
// /**
|
||
// * This is the size (in bytes) of pre-allocated internal `Buffer` instances used
|
||
// * for pooling. This value may be modified.
|
||
// * @since v0.11.3
|
||
// */
|
||
// static poolSize: number;
|
||
|
||
/**
|
||
* Writes `string` to `buf` at `offset` according to the character encoding in`encoding`. The `length` parameter is the number of bytes to write. If `buf` did
|
||
* not contain enough space to fit the entire string, only part of `string` will be
|
||
* written. However, partially encoded characters will not be written.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.alloc(256);
|
||
*
|
||
* const len = buf.write('\u00bd + \u00bc = \u00be', 0);
|
||
*
|
||
* console.log(`${len} bytes: ${buf.toString('utf8', 0, len)}`);
|
||
* // Prints: 12 bytes: ½ + ¼ = ¾
|
||
*
|
||
* const buffer = Buffer.alloc(10);
|
||
*
|
||
* const length = buffer.write('abcd', 8);
|
||
*
|
||
* console.log(`${length} bytes: ${buffer.toString('utf8', 8, 10)}`);
|
||
* // Prints: 2 bytes : ab
|
||
* ```
|
||
* @since v0.1.90
|
||
* @param string String to write to `buf`.
|
||
* @param [offset=0] Number of bytes to skip before starting to write `string`.
|
||
* @param [length=buf.length - offset] Maximum number of bytes to write (written bytes will not exceed `buf.length - offset`).
|
||
* @param [encoding='utf8'] The character encoding of `string`.
|
||
* @return Number of bytes written.
|
||
*/
|
||
write(string: string, encoding?: Encoding): number;
|
||
write(string: string, offset: number, encoding?: Encoding): number;
|
||
write(
|
||
string: string,
|
||
offset: number,
|
||
length: number,
|
||
encoding?: Encoding,
|
||
): number;
|
||
/**
|
||
* Decodes `buf` to a string according to the specified character encoding in`encoding`. `start` and `end` may be passed to decode only a subset of `buf`.
|
||
*
|
||
* If `encoding` is `'utf8'` and a byte sequence in the input is not valid UTF-8,
|
||
* then each invalid byte is replaced with the replacement character `U+FFFD`.
|
||
*
|
||
* The maximum length of a string instance (in UTF-16 code units) is available
|
||
* as {@link constants.MAX_STRING_LENGTH}.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf1 = Buffer.allocUnsafe(26);
|
||
*
|
||
* for (let i = 0; i < 26; i++) {
|
||
* // 97 is the decimal ASCII value for 'a'.
|
||
* buf1[i] = i + 97;
|
||
* }
|
||
*
|
||
* console.log(buf1.toString('utf8'));
|
||
* // Prints: abcdefghijklmnopqrstuvwxyz
|
||
* console.log(buf1.toString('utf8', 0, 5));
|
||
* // Prints: abcde
|
||
*
|
||
* const buf2 = Buffer.from('tést');
|
||
*
|
||
* console.log(buf2.toString('hex'));
|
||
* // Prints: 74c3a97374
|
||
* console.log(buf2.toString('utf8', 0, 3));
|
||
* // Prints: té
|
||
* console.log(buf2.toString(undefined, 0, 3));
|
||
* // Prints: té
|
||
* ```
|
||
* @since v0.1.90
|
||
* @param [encoding='utf8'] The character encoding to use.
|
||
* @param [start=0] The byte offset to start decoding at.
|
||
* @param [end=buf.length] The byte offset to stop decoding at (not inclusive).
|
||
*/
|
||
toString(encoding?: Encoding, start?: number, end?: number): string;
|
||
/**
|
||
* Returns a JSON representation of `buf`. [`JSON.stringify()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify) implicitly calls
|
||
* this function when stringifying a `Buffer` instance.
|
||
*
|
||
* `Buffer.from()` accepts objects in the format returned from this method.
|
||
* In particular, `Buffer.from(buf.toJSON())` works like `Buffer.from(buf)`.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.from([0x1, 0x2, 0x3, 0x4, 0x5]);
|
||
* const json = JSON.stringify(buf);
|
||
*
|
||
* console.log(json);
|
||
* // Prints: {"type":"Buffer","data":[1,2,3,4,5]}
|
||
*
|
||
* const copy = JSON.parse(json, (key, value) => {
|
||
* return value && value.type === 'Buffer' ?
|
||
* Buffer.from(value) :
|
||
* value;
|
||
* });
|
||
*
|
||
* console.log(copy);
|
||
* // Prints: <Buffer 01 02 03 04 05>
|
||
* ```
|
||
* @since v0.9.2
|
||
*/
|
||
toJSON(): {
|
||
type: "Buffer";
|
||
data: number[];
|
||
};
|
||
/**
|
||
* Returns `true` if both `buf` and `otherBuffer` have exactly the same bytes,`false` otherwise. Equivalent to `buf.compare(otherBuffer) === 0`.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf1 = Buffer.from('ABC');
|
||
* const buf2 = Buffer.from('414243', 'hex');
|
||
* const buf3 = Buffer.from('ABCD');
|
||
*
|
||
* console.log(buf1.equals(buf2));
|
||
* // Prints: true
|
||
* console.log(buf1.equals(buf3));
|
||
* // Prints: false
|
||
* ```
|
||
* @since v0.11.13
|
||
* @param otherBuffer A `Buffer` or {@link Uint8Array} with which to compare `buf`.
|
||
*/
|
||
equals(otherBuffer: Uint8Array): boolean;
|
||
/**
|
||
* Compares `buf` with `target` and returns a number indicating whether `buf`comes before, after, or is the same as `target` in sort order.
|
||
* Comparison is based on the actual sequence of bytes in each `Buffer`.
|
||
*
|
||
* * `0` is returned if `target` is the same as `buf`
|
||
* * `1` is returned if `target` should come _before_`buf` when sorted.
|
||
* * `-1` is returned if `target` should come _after_`buf` when sorted.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf1 = Buffer.from('ABC');
|
||
* const buf2 = Buffer.from('BCD');
|
||
* const buf3 = Buffer.from('ABCD');
|
||
*
|
||
* console.log(buf1.compare(buf1));
|
||
* // Prints: 0
|
||
* console.log(buf1.compare(buf2));
|
||
* // Prints: -1
|
||
* console.log(buf1.compare(buf3));
|
||
* // Prints: -1
|
||
* console.log(buf2.compare(buf1));
|
||
* // Prints: 1
|
||
* console.log(buf2.compare(buf3));
|
||
* // Prints: 1
|
||
* console.log([buf1, buf2, buf3].sort(Buffer.compare));
|
||
* // Prints: [ <Buffer 41 42 43>, <Buffer 41 42 43 44>, <Buffer 42 43 44> ]
|
||
* // (This result is equal to: [buf1, buf3, buf2].)
|
||
* ```
|
||
*
|
||
* The optional `targetStart`, `targetEnd`, `sourceStart`, and `sourceEnd`arguments can be used to limit the comparison to specific ranges within `target`and `buf` respectively.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf1 = Buffer.from([1, 2, 3, 4, 5, 6, 7, 8, 9]);
|
||
* const buf2 = Buffer.from([5, 6, 7, 8, 9, 1, 2, 3, 4]);
|
||
*
|
||
* console.log(buf1.compare(buf2, 5, 9, 0, 4));
|
||
* // Prints: 0
|
||
* console.log(buf1.compare(buf2, 0, 6, 4));
|
||
* // Prints: -1
|
||
* console.log(buf1.compare(buf2, 5, 6, 5));
|
||
* // Prints: 1
|
||
* ```
|
||
*
|
||
* `ERR_OUT_OF_RANGE` is thrown if `targetStart < 0`, `sourceStart < 0`,`targetEnd > target.byteLength`, or `sourceEnd > source.byteLength`.
|
||
* @since v0.11.13
|
||
* @param target A `Buffer` or {@link Uint8Array} with which to compare `buf`.
|
||
* @param [targetStart=0] The offset within `target` at which to begin comparison.
|
||
* @param [targetEnd=target.length] The offset within `target` at which to end comparison (not inclusive).
|
||
* @param [sourceStart=0] The offset within `buf` at which to begin comparison.
|
||
* @param [sourceEnd=buf.length] The offset within `buf` at which to end comparison (not inclusive).
|
||
*/
|
||
compare(
|
||
target: Uint8Array,
|
||
targetStart?: number,
|
||
targetEnd?: number,
|
||
sourceStart?: number,
|
||
sourceEnd?: number,
|
||
): number;
|
||
/**
|
||
* Copies data from a region of `buf` to a region in `target`, even if the `target`memory region overlaps with `buf`.
|
||
*
|
||
* [`TypedArray.prototype.set()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray/set) performs the same operation, and is available
|
||
* for all TypedArrays, including Node.js `Buffer`s, although it takes
|
||
* different function arguments.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* // Create two `Buffer` instances.
|
||
* const buf1 = Buffer.allocUnsafe(26);
|
||
* const buf2 = Buffer.allocUnsafe(26).fill('!');
|
||
*
|
||
* for (let i = 0; i < 26; i++) {
|
||
* // 97 is the decimal ASCII value for 'a'.
|
||
* buf1[i] = i + 97;
|
||
* }
|
||
*
|
||
* // Copy `buf1` bytes 16 through 19 into `buf2` starting at byte 8 of `buf2`.
|
||
* buf1.copy(buf2, 8, 16, 20);
|
||
* // This is equivalent to:
|
||
* // buf2.set(buf1.subarray(16, 20), 8);
|
||
*
|
||
* console.log(buf2.toString('ascii', 0, 25));
|
||
* // Prints: !!!!!!!!qrst!!!!!!!!!!!!!
|
||
* ```
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* // Create a `Buffer` and copy data from one region to an overlapping region
|
||
* // within the same `Buffer`.
|
||
*
|
||
* const buf = Buffer.allocUnsafe(26);
|
||
*
|
||
* for (let i = 0; i < 26; i++) {
|
||
* // 97 is the decimal ASCII value for 'a'.
|
||
* buf[i] = i + 97;
|
||
* }
|
||
*
|
||
* buf.copy(buf, 0, 4, 10);
|
||
*
|
||
* console.log(buf.toString());
|
||
* // Prints: efghijghijklmnopqrstuvwxyz
|
||
* ```
|
||
* @since v0.1.90
|
||
* @param target A `Buffer` or {@link Uint8Array} to copy into.
|
||
* @param [targetStart=0] The offset within `target` at which to begin writing.
|
||
* @param [sourceStart=0] The offset within `buf` from which to begin copying.
|
||
* @param [sourceEnd=buf.length] The offset within `buf` at which to stop copying (not inclusive).
|
||
* @return The number of bytes copied.
|
||
*/
|
||
copy(
|
||
target: Uint8Array,
|
||
targetStart?: number,
|
||
sourceStart?: number,
|
||
sourceEnd?: number,
|
||
): number;
|
||
/**
|
||
* Returns a new `Buffer` that references the same memory as the original, but
|
||
* offset and cropped by the `start` and `end` indices.
|
||
*
|
||
* This is the same behavior as `buf.subarray()`.
|
||
*
|
||
* This method is not compatible with the `Uint8Array.prototype.slice()`,
|
||
* which is a superclass of `Buffer`. To copy the slice, use`Uint8Array.prototype.slice()`.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.from('buffer');
|
||
*
|
||
* const copiedBuf = Uint8Array.prototype.slice.call(buf);
|
||
* copiedBuf[0]++;
|
||
* console.log(copiedBuf.toString());
|
||
* // Prints: cuffer
|
||
*
|
||
* console.log(buf.toString());
|
||
* // Prints: buffer
|
||
* ```
|
||
* @since v0.3.0
|
||
* @param [start=0] Where the new `Buffer` will start.
|
||
* @param [end=buf.length] Where the new `Buffer` will end (not inclusive).
|
||
*/
|
||
slice(start?: number, end?: number): Buffer;
|
||
/**
|
||
* Returns a new `Buffer` that references the same memory as the original, but
|
||
* offset and cropped by the `start` and `end` indices.
|
||
*
|
||
* Specifying `end` greater than `buf.length` will return the same result as
|
||
* that of `end` equal to `buf.length`.
|
||
*
|
||
* This method is inherited from [`TypedArray.prototype.subarray()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray/subarray).
|
||
*
|
||
* Modifying the new `Buffer` slice will modify the memory in the original `Buffer`because the allocated memory of the two objects overlap.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* // Create a `Buffer` with the ASCII alphabet, take a slice, and modify one byte
|
||
* // from the original `Buffer`.
|
||
*
|
||
* const buf1 = Buffer.allocUnsafe(26);
|
||
*
|
||
* for (let i = 0; i < 26; i++) {
|
||
* // 97 is the decimal ASCII value for 'a'.
|
||
* buf1[i] = i + 97;
|
||
* }
|
||
*
|
||
* const buf2 = buf1.subarray(0, 3);
|
||
*
|
||
* console.log(buf2.toString('ascii', 0, buf2.length));
|
||
* // Prints: abc
|
||
*
|
||
* buf1[0] = 33;
|
||
*
|
||
* console.log(buf2.toString('ascii', 0, buf2.length));
|
||
* // Prints: !bc
|
||
* ```
|
||
*
|
||
* Specifying negative indexes causes the slice to be generated relative to the
|
||
* end of `buf` rather than the beginning.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.from('buffer');
|
||
*
|
||
* console.log(buf.subarray(-6, -1).toString());
|
||
* // Prints: buffe
|
||
* // (Equivalent to buf.subarray(0, 5).)
|
||
*
|
||
* console.log(buf.subarray(-6, -2).toString());
|
||
* // Prints: buff
|
||
* // (Equivalent to buf.subarray(0, 4).)
|
||
*
|
||
* console.log(buf.subarray(-5, -2).toString());
|
||
* // Prints: uff
|
||
* // (Equivalent to buf.subarray(1, 4).)
|
||
* ```
|
||
* @since v3.0.0
|
||
* @param [start=0] Where the new `Buffer` will start.
|
||
* @param [end=buf.length] Where the new `Buffer` will end (not inclusive).
|
||
*/
|
||
subarray(start?: number, end?: number): Buffer;
|
||
/**
|
||
* Writes `value` to `buf` at the specified `offset` as big-endian.
|
||
*
|
||
* `value` is interpreted and written as a two's complement signed integer.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.allocUnsafe(8);
|
||
*
|
||
* buf.writeBigInt64BE(0x0102030405060708n, 0);
|
||
*
|
||
* console.log(buf);
|
||
* // Prints: <Buffer 01 02 03 04 05 06 07 08>
|
||
* ```
|
||
* @since v12.0.0, v10.20.0
|
||
* @param value Number to be written to `buf`.
|
||
* @param [offset=0] Number of bytes to skip before starting to write. Must satisfy: `0 <= offset <= buf.length - 8`.
|
||
* @return `offset` plus the number of bytes written.
|
||
*/
|
||
writeBigInt64BE(value: bigint, offset?: number): number;
|
||
/**
|
||
* Writes `value` to `buf` at the specified `offset` as little-endian.
|
||
*
|
||
* `value` is interpreted and written as a two's complement signed integer.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.allocUnsafe(8);
|
||
*
|
||
* buf.writeBigInt64LE(0x0102030405060708n, 0);
|
||
*
|
||
* console.log(buf);
|
||
* // Prints: <Buffer 08 07 06 05 04 03 02 01>
|
||
* ```
|
||
* @since v12.0.0, v10.20.0
|
||
* @param value Number to be written to `buf`.
|
||
* @param [offset=0] Number of bytes to skip before starting to write. Must satisfy: `0 <= offset <= buf.length - 8`.
|
||
* @return `offset` plus the number of bytes written.
|
||
*/
|
||
writeBigInt64LE(value: bigint, offset?: number): number;
|
||
/**
|
||
* Writes `value` to `buf` at the specified `offset` as big-endian.
|
||
*
|
||
* This function is also available under the `writeBigUint64BE` alias.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.allocUnsafe(8);
|
||
*
|
||
* buf.writeBigUInt64BE(0xdecafafecacefaden, 0);
|
||
*
|
||
* console.log(buf);
|
||
* // Prints: <Buffer de ca fa fe ca ce fa de>
|
||
* ```
|
||
* @since v12.0.0, v10.20.0
|
||
* @param value Number to be written to `buf`.
|
||
* @param [offset=0] Number of bytes to skip before starting to write. Must satisfy: `0 <= offset <= buf.length - 8`.
|
||
* @return `offset` plus the number of bytes written.
|
||
*/
|
||
writeBigUInt64BE(value: bigint, offset?: number): number;
|
||
/**
|
||
* Writes `value` to `buf` at the specified `offset` as little-endian
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.allocUnsafe(8);
|
||
*
|
||
* buf.writeBigUInt64LE(0xdecafafecacefaden, 0);
|
||
*
|
||
* console.log(buf);
|
||
* // Prints: <Buffer de fa ce ca fe fa ca de>
|
||
* ```
|
||
*
|
||
* This function is also available under the `writeBigUint64LE` alias.
|
||
* @since v12.0.0, v10.20.0
|
||
* @param value Number to be written to `buf`.
|
||
* @param [offset=0] Number of bytes to skip before starting to write. Must satisfy: `0 <= offset <= buf.length - 8`.
|
||
* @return `offset` plus the number of bytes written.
|
||
*/
|
||
writeBigUInt64LE(value: bigint, offset?: number): number;
|
||
/**
|
||
* Writes `byteLength` bytes of `value` to `buf` at the specified `offset`as little-endian. Supports up to 48 bits of accuracy. Behavior is undefined
|
||
* when `value` is anything other than an unsigned integer.
|
||
*
|
||
* This function is also available under the `writeUintLE` alias.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.allocUnsafe(6);
|
||
*
|
||
* buf.writeUIntLE(0x1234567890ab, 0, 6);
|
||
*
|
||
* console.log(buf);
|
||
* // Prints: <Buffer ab 90 78 56 34 12>
|
||
* ```
|
||
* @since v0.5.5
|
||
* @param value Number to be written to `buf`.
|
||
* @param offset Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - byteLength`.
|
||
* @param byteLength Number of bytes to write. Must satisfy `0 < byteLength <= 6`.
|
||
* @return `offset` plus the number of bytes written.
|
||
*/
|
||
writeUIntLE(value: number, offset: number, byteLength: number): number;
|
||
/**
|
||
* Writes `byteLength` bytes of `value` to `buf` at the specified `offset`as big-endian. Supports up to 48 bits of accuracy. Behavior is undefined
|
||
* when `value` is anything other than an unsigned integer.
|
||
*
|
||
* This function is also available under the `writeUintBE` alias.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.allocUnsafe(6);
|
||
*
|
||
* buf.writeUIntBE(0x1234567890ab, 0, 6);
|
||
*
|
||
* console.log(buf);
|
||
* // Prints: <Buffer 12 34 56 78 90 ab>
|
||
* ```
|
||
* @since v0.5.5
|
||
* @param value Number to be written to `buf`.
|
||
* @param offset Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - byteLength`.
|
||
* @param byteLength Number of bytes to write. Must satisfy `0 < byteLength <= 6`.
|
||
* @return `offset` plus the number of bytes written.
|
||
*/
|
||
writeUIntBE(value: number, offset: number, byteLength: number): number;
|
||
/**
|
||
* Writes `byteLength` bytes of `value` to `buf` at the specified `offset`as little-endian. Supports up to 48 bits of accuracy. Behavior is undefined
|
||
* when `value` is anything other than a signed integer.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.allocUnsafe(6);
|
||
*
|
||
* buf.writeIntLE(0x1234567890ab, 0, 6);
|
||
*
|
||
* console.log(buf);
|
||
* // Prints: <Buffer ab 90 78 56 34 12>
|
||
* ```
|
||
* @since v0.11.15
|
||
* @param value Number to be written to `buf`.
|
||
* @param offset Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - byteLength`.
|
||
* @param byteLength Number of bytes to write. Must satisfy `0 < byteLength <= 6`.
|
||
* @return `offset` plus the number of bytes written.
|
||
*/
|
||
writeIntLE(value: number, offset: number, byteLength: number): number;
|
||
/**
|
||
* Writes `byteLength` bytes of `value` to `buf` at the specified `offset`as big-endian. Supports up to 48 bits of accuracy. Behavior is undefined when`value` is anything other than a
|
||
* signed integer.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.allocUnsafe(6);
|
||
*
|
||
* buf.writeIntBE(0x1234567890ab, 0, 6);
|
||
*
|
||
* console.log(buf);
|
||
* // Prints: <Buffer 12 34 56 78 90 ab>
|
||
* ```
|
||
* @since v0.11.15
|
||
* @param value Number to be written to `buf`.
|
||
* @param offset Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - byteLength`.
|
||
* @param byteLength Number of bytes to write. Must satisfy `0 < byteLength <= 6`.
|
||
* @return `offset` plus the number of bytes written.
|
||
*/
|
||
writeIntBE(value: number, offset: number, byteLength: number): number;
|
||
/**
|
||
* Reads an unsigned, big-endian 64-bit integer from `buf` at the specified`offset`.
|
||
*
|
||
* This function is also available under the `readBigUint64BE` alias.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.from([0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff]);
|
||
*
|
||
* console.log(buf.readBigUInt64BE(0));
|
||
* // Prints: 4294967295n
|
||
* ```
|
||
* @since v12.0.0, v10.20.0
|
||
* @param [offset=0] Number of bytes to skip before starting to read. Must satisfy: `0 <= offset <= buf.length - 8`.
|
||
*/
|
||
readBigUInt64BE(offset?: number): bigint;
|
||
/**
|
||
* Reads an unsigned, little-endian 64-bit integer from `buf` at the specified`offset`.
|
||
*
|
||
* This function is also available under the `readBigUint64LE` alias.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.from([0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff]);
|
||
*
|
||
* console.log(buf.readBigUInt64LE(0));
|
||
* // Prints: 18446744069414584320n
|
||
* ```
|
||
* @since v12.0.0, v10.20.0
|
||
* @param [offset=0] Number of bytes to skip before starting to read. Must satisfy: `0 <= offset <= buf.length - 8`.
|
||
*/
|
||
readBigUInt64LE(offset?: number): bigint;
|
||
/**
|
||
* Reads a signed, big-endian 64-bit integer from `buf` at the specified `offset`.
|
||
*
|
||
* Integers read from a `Buffer` are interpreted as two's complement signed
|
||
* values.
|
||
* @since v12.0.0, v10.20.0
|
||
* @param [offset=0] Number of bytes to skip before starting to read. Must satisfy: `0 <= offset <= buf.length - 8`.
|
||
*/
|
||
readBigInt64BE(offset?: number): bigint;
|
||
/**
|
||
* Reads a signed, little-endian 64-bit integer from `buf` at the specified`offset`.
|
||
*
|
||
* Integers read from a `Buffer` are interpreted as two's complement signed
|
||
* values.
|
||
* @since v12.0.0, v10.20.0
|
||
* @param [offset=0] Number of bytes to skip before starting to read. Must satisfy: `0 <= offset <= buf.length - 8`.
|
||
*/
|
||
readBigInt64LE(offset?: number): bigint;
|
||
/**
|
||
* Reads `byteLength` number of bytes from `buf` at the specified `offset`and interprets the result as an unsigned, little-endian integer supporting
|
||
* up to 48 bits of accuracy.
|
||
*
|
||
* This function is also available under the `readUintLE` alias.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.from([0x12, 0x34, 0x56, 0x78, 0x90, 0xab]);
|
||
*
|
||
* console.log(buf.readUIntLE(0, 6).toString(16));
|
||
* // Prints: ab9078563412
|
||
* ```
|
||
* @since v0.11.15
|
||
* @param offset Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - byteLength`.
|
||
* @param byteLength Number of bytes to read. Must satisfy `0 < byteLength <= 6`.
|
||
*/
|
||
readUIntLE(offset: number, byteLength: number): number;
|
||
/**
|
||
* Reads `byteLength` number of bytes from `buf` at the specified `offset`and interprets the result as an unsigned big-endian integer supporting
|
||
* up to 48 bits of accuracy.
|
||
*
|
||
* This function is also available under the `readUintBE` alias.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.from([0x12, 0x34, 0x56, 0x78, 0x90, 0xab]);
|
||
*
|
||
* console.log(buf.readUIntBE(0, 6).toString(16));
|
||
* // Prints: 1234567890ab
|
||
* console.log(buf.readUIntBE(1, 6).toString(16));
|
||
* // Throws ERR_OUT_OF_RANGE.
|
||
* ```
|
||
* @since v0.11.15
|
||
* @param offset Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - byteLength`.
|
||
* @param byteLength Number of bytes to read. Must satisfy `0 < byteLength <= 6`.
|
||
*/
|
||
readUIntBE(offset: number, byteLength: number): number;
|
||
/**
|
||
* Reads `byteLength` number of bytes from `buf` at the specified `offset`and interprets the result as a little-endian, two's complement signed value
|
||
* supporting up to 48 bits of accuracy.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.from([0x12, 0x34, 0x56, 0x78, 0x90, 0xab]);
|
||
*
|
||
* console.log(buf.readIntLE(0, 6).toString(16));
|
||
* // Prints: -546f87a9cbee
|
||
* ```
|
||
* @since v0.11.15
|
||
* @param offset Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - byteLength`.
|
||
* @param byteLength Number of bytes to read. Must satisfy `0 < byteLength <= 6`.
|
||
*/
|
||
readIntLE(offset: number, byteLength: number): number;
|
||
/**
|
||
* Reads `byteLength` number of bytes from `buf` at the specified `offset`and interprets the result as a big-endian, two's complement signed value
|
||
* supporting up to 48 bits of accuracy.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.from([0x12, 0x34, 0x56, 0x78, 0x90, 0xab]);
|
||
*
|
||
* console.log(buf.readIntBE(0, 6).toString(16));
|
||
* // Prints: 1234567890ab
|
||
* console.log(buf.readIntBE(1, 6).toString(16));
|
||
* // Throws ERR_OUT_OF_RANGE.
|
||
* console.log(buf.readIntBE(1, 0).toString(16));
|
||
* // Throws ERR_OUT_OF_RANGE.
|
||
* ```
|
||
* @since v0.11.15
|
||
* @param offset Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - byteLength`.
|
||
* @param byteLength Number of bytes to read. Must satisfy `0 < byteLength <= 6`.
|
||
*/
|
||
readIntBE(offset: number, byteLength: number): number;
|
||
/**
|
||
* Reads an unsigned 8-bit integer from `buf` at the specified `offset`.
|
||
*
|
||
* This function is also available under the `readUint8` alias.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.from([1, -2]);
|
||
*
|
||
* console.log(buf.readUInt8(0));
|
||
* // Prints: 1
|
||
* console.log(buf.readUInt8(1));
|
||
* // Prints: 254
|
||
* console.log(buf.readUInt8(2));
|
||
* // Throws ERR_OUT_OF_RANGE.
|
||
* ```
|
||
* @since v0.5.0
|
||
* @param [offset=0] Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 1`.
|
||
*/
|
||
readUInt8(offset?: number): number;
|
||
/**
|
||
* Reads an unsigned, little-endian 16-bit integer from `buf` at the specified`offset`.
|
||
*
|
||
* This function is also available under the `readUint16LE` alias.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.from([0x12, 0x34, 0x56]);
|
||
*
|
||
* console.log(buf.readUInt16LE(0).toString(16));
|
||
* // Prints: 3412
|
||
* console.log(buf.readUInt16LE(1).toString(16));
|
||
* // Prints: 5634
|
||
* console.log(buf.readUInt16LE(2).toString(16));
|
||
* // Throws ERR_OUT_OF_RANGE.
|
||
* ```
|
||
* @since v0.5.5
|
||
* @param [offset=0] Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 2`.
|
||
*/
|
||
readUInt16LE(offset?: number): number;
|
||
/**
|
||
* Reads an unsigned, big-endian 16-bit integer from `buf` at the specified`offset`.
|
||
*
|
||
* This function is also available under the `readUint16BE` alias.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.from([0x12, 0x34, 0x56]);
|
||
*
|
||
* console.log(buf.readUInt16BE(0).toString(16));
|
||
* // Prints: 1234
|
||
* console.log(buf.readUInt16BE(1).toString(16));
|
||
* // Prints: 3456
|
||
* ```
|
||
* @since v0.5.5
|
||
* @param [offset=0] Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 2`.
|
||
*/
|
||
readUInt16BE(offset?: number): number;
|
||
/**
|
||
* Reads an unsigned, little-endian 32-bit integer from `buf` at the specified`offset`.
|
||
*
|
||
* This function is also available under the `readUint32LE` alias.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.from([0x12, 0x34, 0x56, 0x78]);
|
||
*
|
||
* console.log(buf.readUInt32LE(0).toString(16));
|
||
* // Prints: 78563412
|
||
* console.log(buf.readUInt32LE(1).toString(16));
|
||
* // Throws ERR_OUT_OF_RANGE.
|
||
* ```
|
||
* @since v0.5.5
|
||
* @param [offset=0] Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 4`.
|
||
*/
|
||
readUInt32LE(offset?: number): number;
|
||
/**
|
||
* Reads an unsigned, big-endian 32-bit integer from `buf` at the specified`offset`.
|
||
*
|
||
* This function is also available under the `readUint32BE` alias.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.from([0x12, 0x34, 0x56, 0x78]);
|
||
*
|
||
* console.log(buf.readUInt32BE(0).toString(16));
|
||
* // Prints: 12345678
|
||
* ```
|
||
* @since v0.5.5
|
||
* @param [offset=0] Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 4`.
|
||
*/
|
||
readUInt32BE(offset?: number): number;
|
||
/**
|
||
* Reads a signed 8-bit integer from `buf` at the specified `offset`.
|
||
*
|
||
* Integers read from a `Buffer` are interpreted as two's complement signed values.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.from([-1, 5]);
|
||
*
|
||
* console.log(buf.readInt8(0));
|
||
* // Prints: -1
|
||
* console.log(buf.readInt8(1));
|
||
* // Prints: 5
|
||
* console.log(buf.readInt8(2));
|
||
* // Throws ERR_OUT_OF_RANGE.
|
||
* ```
|
||
* @since v0.5.0
|
||
* @param [offset=0] Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 1`.
|
||
*/
|
||
readInt8(offset?: number): number;
|
||
/**
|
||
* Reads a signed, little-endian 16-bit integer from `buf` at the specified`offset`.
|
||
*
|
||
* Integers read from a `Buffer` are interpreted as two's complement signed values.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.from([0, 5]);
|
||
*
|
||
* console.log(buf.readInt16LE(0));
|
||
* // Prints: 1280
|
||
* console.log(buf.readInt16LE(1));
|
||
* // Throws ERR_OUT_OF_RANGE.
|
||
* ```
|
||
* @since v0.5.5
|
||
* @param [offset=0] Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 2`.
|
||
*/
|
||
readInt16LE(offset?: number): number;
|
||
/**
|
||
* Reads a signed, big-endian 16-bit integer from `buf` at the specified `offset`.
|
||
*
|
||
* Integers read from a `Buffer` are interpreted as two's complement signed values.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.from([0, 5]);
|
||
*
|
||
* console.log(buf.readInt16BE(0));
|
||
* // Prints: 5
|
||
* ```
|
||
* @since v0.5.5
|
||
* @param [offset=0] Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 2`.
|
||
*/
|
||
readInt16BE(offset?: number): number;
|
||
/**
|
||
* Reads a signed, little-endian 32-bit integer from `buf` at the specified`offset`.
|
||
*
|
||
* Integers read from a `Buffer` are interpreted as two's complement signed values.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.from([0, 0, 0, 5]);
|
||
*
|
||
* console.log(buf.readInt32LE(0));
|
||
* // Prints: 83886080
|
||
* console.log(buf.readInt32LE(1));
|
||
* // Throws ERR_OUT_OF_RANGE.
|
||
* ```
|
||
* @since v0.5.5
|
||
* @param [offset=0] Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 4`.
|
||
*/
|
||
readInt32LE(offset?: number): number;
|
||
/**
|
||
* Reads a signed, big-endian 32-bit integer from `buf` at the specified `offset`.
|
||
*
|
||
* Integers read from a `Buffer` are interpreted as two's complement signed values.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.from([0, 0, 0, 5]);
|
||
*
|
||
* console.log(buf.readInt32BE(0));
|
||
* // Prints: 5
|
||
* ```
|
||
* @since v0.5.5
|
||
* @param [offset=0] Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 4`.
|
||
*/
|
||
readInt32BE(offset?: number): number;
|
||
/**
|
||
* Reads a 32-bit, little-endian float from `buf` at the specified `offset`.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.from([1, 2, 3, 4]);
|
||
*
|
||
* console.log(buf.readFloatLE(0));
|
||
* // Prints: 1.539989614439558e-36
|
||
* console.log(buf.readFloatLE(1));
|
||
* // Throws ERR_OUT_OF_RANGE.
|
||
* ```
|
||
* @since v0.11.15
|
||
* @param [offset=0] Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 4`.
|
||
*/
|
||
readFloatLE(offset?: number): number;
|
||
/**
|
||
* Reads a 32-bit, big-endian float from `buf` at the specified `offset`.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.from([1, 2, 3, 4]);
|
||
*
|
||
* console.log(buf.readFloatBE(0));
|
||
* // Prints: 2.387939260590663e-38
|
||
* ```
|
||
* @since v0.11.15
|
||
* @param [offset=0] Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 4`.
|
||
*/
|
||
readFloatBE(offset?: number): number;
|
||
/**
|
||
* Reads a 64-bit, little-endian double from `buf` at the specified `offset`.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.from([1, 2, 3, 4, 5, 6, 7, 8]);
|
||
*
|
||
* console.log(buf.readDoubleLE(0));
|
||
* // Prints: 5.447603722011605e-270
|
||
* console.log(buf.readDoubleLE(1));
|
||
* // Throws ERR_OUT_OF_RANGE.
|
||
* ```
|
||
* @since v0.11.15
|
||
* @param [offset=0] Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 8`.
|
||
*/
|
||
readDoubleLE(offset?: number): number;
|
||
/**
|
||
* Reads a 64-bit, big-endian double from `buf` at the specified `offset`.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.from([1, 2, 3, 4, 5, 6, 7, 8]);
|
||
*
|
||
* console.log(buf.readDoubleBE(0));
|
||
* // Prints: 8.20788039913184e-304
|
||
* ```
|
||
* @since v0.11.15
|
||
* @param [offset=0] Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 8`.
|
||
*/
|
||
readDoubleBE(offset?: number): number;
|
||
reverse(): this;
|
||
/**
|
||
* Interprets `buf` as an array of unsigned 16-bit integers and swaps the
|
||
* byte order _in-place_. Throws `ERR_INVALID_BUFFER_SIZE` if `buf.length` is not a multiple of 2.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf1 = Buffer.from([0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8]);
|
||
*
|
||
* console.log(buf1);
|
||
* // Prints: <Buffer 01 02 03 04 05 06 07 08>
|
||
*
|
||
* buf1.swap16();
|
||
*
|
||
* console.log(buf1);
|
||
* // Prints: <Buffer 02 01 04 03 06 05 08 07>
|
||
*
|
||
* const buf2 = Buffer.from([0x1, 0x2, 0x3]);
|
||
*
|
||
* buf2.swap16();
|
||
* // Throws ERR_INVALID_BUFFER_SIZE.
|
||
* ```
|
||
*
|
||
* One convenient use of `buf.swap16()` is to perform a fast in-place conversion
|
||
* between UTF-16 little-endian and UTF-16 big-endian:
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.from('This is little-endian UTF-16', 'utf16le');
|
||
* buf.swap16(); // Convert to big-endian UTF-16 text.
|
||
* ```
|
||
* @since v5.10.0
|
||
* @return A reference to `buf`.
|
||
*/
|
||
swap16(): Buffer;
|
||
/**
|
||
* Interprets `buf` as an array of unsigned 32-bit integers and swaps the
|
||
* byte order _in-place_. Throws `ERR_INVALID_BUFFER_SIZE` if `buf.length` is not a multiple of 4.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf1 = Buffer.from([0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8]);
|
||
*
|
||
* console.log(buf1);
|
||
* // Prints: <Buffer 01 02 03 04 05 06 07 08>
|
||
*
|
||
* buf1.swap32();
|
||
*
|
||
* console.log(buf1);
|
||
* // Prints: <Buffer 04 03 02 01 08 07 06 05>
|
||
*
|
||
* const buf2 = Buffer.from([0x1, 0x2, 0x3]);
|
||
*
|
||
* buf2.swap32();
|
||
* // Throws ERR_INVALID_BUFFER_SIZE.
|
||
* ```
|
||
* @since v5.10.0
|
||
* @return A reference to `buf`.
|
||
*/
|
||
swap32(): Buffer;
|
||
/**
|
||
* Interprets `buf` as an array of 64-bit numbers and swaps byte order _in-place_.
|
||
* Throws `ERR_INVALID_BUFFER_SIZE` if `buf.length` is not a multiple of 8.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf1 = Buffer.from([0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8]);
|
||
*
|
||
* console.log(buf1);
|
||
* // Prints: <Buffer 01 02 03 04 05 06 07 08>
|
||
*
|
||
* buf1.swap64();
|
||
*
|
||
* console.log(buf1);
|
||
* // Prints: <Buffer 08 07 06 05 04 03 02 01>
|
||
*
|
||
* const buf2 = Buffer.from([0x1, 0x2, 0x3]);
|
||
*
|
||
* buf2.swap64();
|
||
* // Throws ERR_INVALID_BUFFER_SIZE.
|
||
* ```
|
||
* @since v6.3.0
|
||
* @return A reference to `buf`.
|
||
*/
|
||
swap64(): Buffer;
|
||
/**
|
||
* Writes `value` to `buf` at the specified `offset`. `value` must be a
|
||
* valid unsigned 8-bit integer. Behavior is undefined when `value` is anything
|
||
* other than an unsigned 8-bit integer.
|
||
*
|
||
* This function is also available under the `writeUint8` alias.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.allocUnsafe(4);
|
||
*
|
||
* buf.writeUInt8(0x3, 0);
|
||
* buf.writeUInt8(0x4, 1);
|
||
* buf.writeUInt8(0x23, 2);
|
||
* buf.writeUInt8(0x42, 3);
|
||
*
|
||
* console.log(buf);
|
||
* // Prints: <Buffer 03 04 23 42>
|
||
* ```
|
||
* @since v0.5.0
|
||
* @param value Number to be written to `buf`.
|
||
* @param [offset=0] Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 1`.
|
||
* @return `offset` plus the number of bytes written.
|
||
*/
|
||
writeUInt8(value: number, offset?: number): number;
|
||
/**
|
||
* Writes `value` to `buf` at the specified `offset` as little-endian. The `value`must be a valid unsigned 16-bit integer. Behavior is undefined when `value` is
|
||
* anything other than an unsigned 16-bit integer.
|
||
*
|
||
* This function is also available under the `writeUint16LE` alias.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.allocUnsafe(4);
|
||
*
|
||
* buf.writeUInt16LE(0xdead, 0);
|
||
* buf.writeUInt16LE(0xbeef, 2);
|
||
*
|
||
* console.log(buf);
|
||
* // Prints: <Buffer ad de ef be>
|
||
* ```
|
||
* @since v0.5.5
|
||
* @param value Number to be written to `buf`.
|
||
* @param [offset=0] Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 2`.
|
||
* @return `offset` plus the number of bytes written.
|
||
*/
|
||
writeUInt16LE(value: number, offset?: number): number;
|
||
/**
|
||
* Writes `value` to `buf` at the specified `offset` as big-endian. The `value`must be a valid unsigned 16-bit integer. Behavior is undefined when `value`is anything other than an
|
||
* unsigned 16-bit integer.
|
||
*
|
||
* This function is also available under the `writeUint16BE` alias.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.allocUnsafe(4);
|
||
*
|
||
* buf.writeUInt16BE(0xdead, 0);
|
||
* buf.writeUInt16BE(0xbeef, 2);
|
||
*
|
||
* console.log(buf);
|
||
* // Prints: <Buffer de ad be ef>
|
||
* ```
|
||
* @since v0.5.5
|
||
* @param value Number to be written to `buf`.
|
||
* @param [offset=0] Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 2`.
|
||
* @return `offset` plus the number of bytes written.
|
||
*/
|
||
writeUInt16BE(value: number, offset?: number): number;
|
||
/**
|
||
* Writes `value` to `buf` at the specified `offset` as little-endian. The `value`must be a valid unsigned 32-bit integer. Behavior is undefined when `value` is
|
||
* anything other than an unsigned 32-bit integer.
|
||
*
|
||
* This function is also available under the `writeUint32LE` alias.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.allocUnsafe(4);
|
||
*
|
||
* buf.writeUInt32LE(0xfeedface, 0);
|
||
*
|
||
* console.log(buf);
|
||
* // Prints: <Buffer ce fa ed fe>
|
||
* ```
|
||
* @since v0.5.5
|
||
* @param value Number to be written to `buf`.
|
||
* @param [offset=0] Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 4`.
|
||
* @return `offset` plus the number of bytes written.
|
||
*/
|
||
writeUInt32LE(value: number, offset?: number): number;
|
||
/**
|
||
* Writes `value` to `buf` at the specified `offset` as big-endian. The `value`must be a valid unsigned 32-bit integer. Behavior is undefined when `value`is anything other than an
|
||
* unsigned 32-bit integer.
|
||
*
|
||
* This function is also available under the `writeUint32BE` alias.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.allocUnsafe(4);
|
||
*
|
||
* buf.writeUInt32BE(0xfeedface, 0);
|
||
*
|
||
* console.log(buf);
|
||
* // Prints: <Buffer fe ed fa ce>
|
||
* ```
|
||
* @since v0.5.5
|
||
* @param value Number to be written to `buf`.
|
||
* @param [offset=0] Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 4`.
|
||
* @return `offset` plus the number of bytes written.
|
||
*/
|
||
writeUInt32BE(value: number, offset?: number): number;
|
||
/**
|
||
* Writes `value` to `buf` at the specified `offset`. `value` must be a valid
|
||
* signed 8-bit integer. Behavior is undefined when `value` is anything other than
|
||
* a signed 8-bit integer.
|
||
*
|
||
* `value` is interpreted and written as a two's complement signed integer.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.allocUnsafe(2);
|
||
*
|
||
* buf.writeInt8(2, 0);
|
||
* buf.writeInt8(-2, 1);
|
||
*
|
||
* console.log(buf);
|
||
* // Prints: <Buffer 02 fe>
|
||
* ```
|
||
* @since v0.5.0
|
||
* @param value Number to be written to `buf`.
|
||
* @param [offset=0] Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 1`.
|
||
* @return `offset` plus the number of bytes written.
|
||
*/
|
||
writeInt8(value: number, offset?: number): number;
|
||
/**
|
||
* Writes `value` to `buf` at the specified `offset` as little-endian. The `value`must be a valid signed 16-bit integer. Behavior is undefined when `value` is
|
||
* anything other than a signed 16-bit integer.
|
||
*
|
||
* The `value` is interpreted and written as a two's complement signed integer.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.allocUnsafe(2);
|
||
*
|
||
* buf.writeInt16LE(0x0304, 0);
|
||
*
|
||
* console.log(buf);
|
||
* // Prints: <Buffer 04 03>
|
||
* ```
|
||
* @since v0.5.5
|
||
* @param value Number to be written to `buf`.
|
||
* @param [offset=0] Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 2`.
|
||
* @return `offset` plus the number of bytes written.
|
||
*/
|
||
writeInt16LE(value: number, offset?: number): number;
|
||
/**
|
||
* Writes `value` to `buf` at the specified `offset` as big-endian. The `value`must be a valid signed 16-bit integer. Behavior is undefined when `value` is
|
||
* anything other than a signed 16-bit integer.
|
||
*
|
||
* The `value` is interpreted and written as a two's complement signed integer.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.allocUnsafe(2);
|
||
*
|
||
* buf.writeInt16BE(0x0102, 0);
|
||
*
|
||
* console.log(buf);
|
||
* // Prints: <Buffer 01 02>
|
||
* ```
|
||
* @since v0.5.5
|
||
* @param value Number to be written to `buf`.
|
||
* @param [offset=0] Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 2`.
|
||
* @return `offset` plus the number of bytes written.
|
||
*/
|
||
writeInt16BE(value: number, offset?: number): number;
|
||
/**
|
||
* Writes `value` to `buf` at the specified `offset` as little-endian. The `value`must be a valid signed 32-bit integer. Behavior is undefined when `value` is
|
||
* anything other than a signed 32-bit integer.
|
||
*
|
||
* The `value` is interpreted and written as a two's complement signed integer.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.allocUnsafe(4);
|
||
*
|
||
* buf.writeInt32LE(0x05060708, 0);
|
||
*
|
||
* console.log(buf);
|
||
* // Prints: <Buffer 08 07 06 05>
|
||
* ```
|
||
* @since v0.5.5
|
||
* @param value Number to be written to `buf`.
|
||
* @param [offset=0] Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 4`.
|
||
* @return `offset` plus the number of bytes written.
|
||
*/
|
||
writeInt32LE(value: number, offset?: number): number;
|
||
/**
|
||
* Writes `value` to `buf` at the specified `offset` as big-endian. The `value`must be a valid signed 32-bit integer. Behavior is undefined when `value` is
|
||
* anything other than a signed 32-bit integer.
|
||
*
|
||
* The `value` is interpreted and written as a two's complement signed integer.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.allocUnsafe(4);
|
||
*
|
||
* buf.writeInt32BE(0x01020304, 0);
|
||
*
|
||
* console.log(buf);
|
||
* // Prints: <Buffer 01 02 03 04>
|
||
* ```
|
||
* @since v0.5.5
|
||
* @param value Number to be written to `buf`.
|
||
* @param [offset=0] Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 4`.
|
||
* @return `offset` plus the number of bytes written.
|
||
*/
|
||
writeInt32BE(value: number, offset?: number): number;
|
||
/**
|
||
* Writes `value` to `buf` at the specified `offset` as little-endian. Behavior is
|
||
* undefined when `value` is anything other than a JavaScript number.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.allocUnsafe(4);
|
||
*
|
||
* buf.writeFloatLE(0xcafebabe, 0);
|
||
*
|
||
* console.log(buf);
|
||
* // Prints: <Buffer bb fe 4a 4f>
|
||
* ```
|
||
* @since v0.11.15
|
||
* @param value Number to be written to `buf`.
|
||
* @param [offset=0] Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 4`.
|
||
* @return `offset` plus the number of bytes written.
|
||
*/
|
||
writeFloatLE(value: number, offset?: number): number;
|
||
/**
|
||
* Writes `value` to `buf` at the specified `offset` as big-endian. Behavior is
|
||
* undefined when `value` is anything other than a JavaScript number.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.allocUnsafe(4);
|
||
*
|
||
* buf.writeFloatBE(0xcafebabe, 0);
|
||
*
|
||
* console.log(buf);
|
||
* // Prints: <Buffer 4f 4a fe bb>
|
||
* ```
|
||
* @since v0.11.15
|
||
* @param value Number to be written to `buf`.
|
||
* @param [offset=0] Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 4`.
|
||
* @return `offset` plus the number of bytes written.
|
||
*/
|
||
writeFloatBE(value: number, offset?: number): number;
|
||
/**
|
||
* Writes `value` to `buf` at the specified `offset` as little-endian. The `value`must be a JavaScript number. Behavior is undefined when `value` is anything
|
||
* other than a JavaScript number.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.allocUnsafe(8);
|
||
*
|
||
* buf.writeDoubleLE(123.456, 0);
|
||
*
|
||
* console.log(buf);
|
||
* // Prints: <Buffer 77 be 9f 1a 2f dd 5e 40>
|
||
* ```
|
||
* @since v0.11.15
|
||
* @param value Number to be written to `buf`.
|
||
* @param [offset=0] Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 8`.
|
||
* @return `offset` plus the number of bytes written.
|
||
*/
|
||
writeDoubleLE(value: number, offset?: number): number;
|
||
/**
|
||
* Writes `value` to `buf` at the specified `offset` as big-endian. The `value`must be a JavaScript number. Behavior is undefined when `value` is anything
|
||
* other than a JavaScript number.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.allocUnsafe(8);
|
||
*
|
||
* buf.writeDoubleBE(123.456, 0);
|
||
*
|
||
* console.log(buf);
|
||
* // Prints: <Buffer 40 5e dd 2f 1a 9f be 77>
|
||
* ```
|
||
* @since v0.11.15
|
||
* @param value Number to be written to `buf`.
|
||
* @param [offset=0] Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 8`.
|
||
* @return `offset` plus the number of bytes written.
|
||
*/
|
||
writeDoubleBE(value: number, offset?: number): number;
|
||
/**
|
||
* Fills `buf` with the specified `value`. If the `offset` and `end` are not given,
|
||
* the entire `buf` will be filled:
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* // Fill a `Buffer` with the ASCII character 'h'.
|
||
*
|
||
* const b = Buffer.allocUnsafe(50).fill('h');
|
||
*
|
||
* console.log(b.toString());
|
||
* // Prints: hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
|
||
* ```
|
||
*
|
||
* `value` is coerced to a `uint32` value if it is not a string, `Buffer`, or
|
||
* integer. If the resulting integer is greater than `255` (decimal), `buf` will be
|
||
* filled with `value & 255`.
|
||
*
|
||
* If the final write of a `fill()` operation falls on a multi-byte character,
|
||
* then only the bytes of that character that fit into `buf` are written:
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* // Fill a `Buffer` with character that takes up two bytes in UTF-8.
|
||
*
|
||
* console.log(Buffer.allocUnsafe(5).fill('\u0222'));
|
||
* // Prints: <Buffer c8 a2 c8 a2 c8>
|
||
* ```
|
||
*
|
||
* If `value` contains invalid characters, it is truncated; if no valid
|
||
* fill data remains, an exception is thrown:
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.allocUnsafe(5);
|
||
*
|
||
* console.log(buf.fill('a'));
|
||
* // Prints: <Buffer 61 61 61 61 61>
|
||
* console.log(buf.fill('aazz', 'hex'));
|
||
* // Prints: <Buffer aa aa aa aa aa>
|
||
* console.log(buf.fill('zz', 'hex'));
|
||
* // Throws an exception.
|
||
* ```
|
||
* @since v0.5.0
|
||
* @param value The value with which to fill `buf`.
|
||
* @param [offset=0] Number of bytes to skip before starting to fill `buf`.
|
||
* @param [end=buf.length] Where to stop filling `buf` (not inclusive).
|
||
* @param [encoding='utf8'] The encoding for `value` if `value` is a string.
|
||
* @return A reference to `buf`.
|
||
*/
|
||
fill(
|
||
value: string | Uint8Array | number,
|
||
offset?: number,
|
||
end?: number,
|
||
encoding?: Encoding,
|
||
): this;
|
||
/**
|
||
* If `value` is:
|
||
*
|
||
* * a string, `value` is interpreted according to the character encoding in`encoding`.
|
||
* * a `Buffer` or [`Uint8Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Uint8Array), `value` will be used in its entirety.
|
||
* To compare a partial `Buffer`, use `buf.slice()`.
|
||
* * a number, `value` will be interpreted as an unsigned 8-bit integer
|
||
* value between `0` and `255`.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.from('this is a buffer');
|
||
*
|
||
* console.log(buf.indexOf('this'));
|
||
* // Prints: 0
|
||
* console.log(buf.indexOf('is'));
|
||
* // Prints: 2
|
||
* console.log(buf.indexOf(Buffer.from('a buffer')));
|
||
* // Prints: 8
|
||
* console.log(buf.indexOf(97));
|
||
* // Prints: 8 (97 is the decimal ASCII value for 'a')
|
||
* console.log(buf.indexOf(Buffer.from('a buffer example')));
|
||
* // Prints: -1
|
||
* console.log(buf.indexOf(Buffer.from('a buffer example').slice(0, 8)));
|
||
* // Prints: 8
|
||
*
|
||
* const utf16Buffer = Buffer.from('\u039a\u0391\u03a3\u03a3\u0395', 'utf16le');
|
||
*
|
||
* console.log(utf16Buffer.indexOf('\u03a3', 0, 'utf16le'));
|
||
* // Prints: 4
|
||
* console.log(utf16Buffer.indexOf('\u03a3', -4, 'utf16le'));
|
||
* // Prints: 6
|
||
* ```
|
||
*
|
||
* If `value` is not a string, number, or `Buffer`, this method will throw a`TypeError`. If `value` is a number, it will be coerced to a valid byte value,
|
||
* an integer between 0 and 255.
|
||
*
|
||
* If `byteOffset` is not a number, it will be coerced to a number. If the result
|
||
* of coercion is `NaN` or `0`, then the entire buffer will be searched. This
|
||
* behavior matches [`String.prototype.indexOf()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/indexOf).
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const b = Buffer.from('abcdef');
|
||
*
|
||
* // Passing a value that's a number, but not a valid byte.
|
||
* // Prints: 2, equivalent to searching for 99 or 'c'.
|
||
* console.log(b.indexOf(99.9));
|
||
* console.log(b.indexOf(256 + 99));
|
||
*
|
||
* // Passing a byteOffset that coerces to NaN or 0.
|
||
* // Prints: 1, searching the whole buffer.
|
||
* console.log(b.indexOf('b', undefined));
|
||
* console.log(b.indexOf('b', {}));
|
||
* console.log(b.indexOf('b', null));
|
||
* console.log(b.indexOf('b', []));
|
||
* ```
|
||
*
|
||
* If `value` is an empty string or empty `Buffer` and `byteOffset` is less
|
||
* than `buf.length`, `byteOffset` will be returned. If `value` is empty and`byteOffset` is at least `buf.length`, `buf.length` will be returned.
|
||
* @since v1.5.0
|
||
* @param value What to search for.
|
||
* @param [byteOffset=0] Where to begin searching in `buf`. If negative, then offset is calculated from the end of `buf`.
|
||
* @param [encoding='utf8'] If `value` is a string, this is the encoding used to determine the binary representation of the string that will be searched for in `buf`.
|
||
* @return The index of the first occurrence of `value` in `buf`, or `-1` if `buf` does not contain `value`.
|
||
*/
|
||
indexOf(
|
||
value: string | number | Uint8Array,
|
||
byteOffset?: number,
|
||
encoding?: Encoding,
|
||
): number;
|
||
/**
|
||
* Identical to `buf.indexOf()`, except the last occurrence of `value` is found
|
||
* rather than the first occurrence.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.from('this buffer is a buffer');
|
||
*
|
||
* console.log(buf.lastIndexOf('this'));
|
||
* // Prints: 0
|
||
* console.log(buf.lastIndexOf('buffer'));
|
||
* // Prints: 17
|
||
* console.log(buf.lastIndexOf(Buffer.from('buffer')));
|
||
* // Prints: 17
|
||
* console.log(buf.lastIndexOf(97));
|
||
* // Prints: 15 (97 is the decimal ASCII value for 'a')
|
||
* console.log(buf.lastIndexOf(Buffer.from('yolo')));
|
||
* // Prints: -1
|
||
* console.log(buf.lastIndexOf('buffer', 5));
|
||
* // Prints: 5
|
||
* console.log(buf.lastIndexOf('buffer', 4));
|
||
* // Prints: -1
|
||
*
|
||
* const utf16Buffer = Buffer.from('\u039a\u0391\u03a3\u03a3\u0395', 'utf16le');
|
||
*
|
||
* console.log(utf16Buffer.lastIndexOf('\u03a3', undefined, 'utf16le'));
|
||
* // Prints: 6
|
||
* console.log(utf16Buffer.lastIndexOf('\u03a3', -5, 'utf16le'));
|
||
* // Prints: 4
|
||
* ```
|
||
*
|
||
* If `value` is not a string, number, or `Buffer`, this method will throw a`TypeError`. If `value` is a number, it will be coerced to a valid byte value,
|
||
* an integer between 0 and 255.
|
||
*
|
||
* If `byteOffset` is not a number, it will be coerced to a number. Any arguments
|
||
* that coerce to `NaN`, like `{}` or `undefined`, will search the whole buffer.
|
||
* This behavior matches [`String.prototype.lastIndexOf()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/lastIndexOf).
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const b = Buffer.from('abcdef');
|
||
*
|
||
* // Passing a value that's a number, but not a valid byte.
|
||
* // Prints: 2, equivalent to searching for 99 or 'c'.
|
||
* console.log(b.lastIndexOf(99.9));
|
||
* console.log(b.lastIndexOf(256 + 99));
|
||
*
|
||
* // Passing a byteOffset that coerces to NaN.
|
||
* // Prints: 1, searching the whole buffer.
|
||
* console.log(b.lastIndexOf('b', undefined));
|
||
* console.log(b.lastIndexOf('b', {}));
|
||
*
|
||
* // Passing a byteOffset that coerces to 0.
|
||
* // Prints: -1, equivalent to passing 0.
|
||
* console.log(b.lastIndexOf('b', null));
|
||
* console.log(b.lastIndexOf('b', []));
|
||
* ```
|
||
*
|
||
* If `value` is an empty string or empty `Buffer`, `byteOffset` will be returned.
|
||
* @since v6.0.0
|
||
* @param value What to search for.
|
||
* @param [byteOffset=buf.length - 1] Where to begin searching in `buf`. If negative, then offset is calculated from the end of `buf`.
|
||
* @param [encoding='utf8'] If `value` is a string, this is the encoding used to determine the binary representation of the string that will be searched for in `buf`.
|
||
* @return The index of the last occurrence of `value` in `buf`, or `-1` if `buf` does not contain `value`.
|
||
*/
|
||
lastIndexOf(
|
||
value: string | number | Uint8Array,
|
||
byteOffset?: number,
|
||
encoding?: Encoding,
|
||
): number;
|
||
/**
|
||
* Creates and returns an [iterator](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Iteration_protocols) of `[index, byte]` pairs from the contents
|
||
* of `buf`.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* // Log the entire contents of a `Buffer`.
|
||
*
|
||
* const buf = Buffer.from('buffer');
|
||
*
|
||
* for (const pair of buf.entries()) {
|
||
* console.log(pair);
|
||
* }
|
||
* // Prints:
|
||
* // [0, 98]
|
||
* // [1, 117]
|
||
* // [2, 102]
|
||
* // [3, 102]
|
||
* // [4, 101]
|
||
* // [5, 114]
|
||
* ```
|
||
* @since v1.1.0
|
||
*/
|
||
entries(): IterableIterator<[number, number]>;
|
||
/**
|
||
* Equivalent to `buf.indexOf() !== -1`.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.from('this is a buffer');
|
||
*
|
||
* console.log(buf.includes('this'));
|
||
* // Prints: true
|
||
* console.log(buf.includes('is'));
|
||
* // Prints: true
|
||
* console.log(buf.includes(Buffer.from('a buffer')));
|
||
* // Prints: true
|
||
* console.log(buf.includes(97));
|
||
* // Prints: true (97 is the decimal ASCII value for 'a')
|
||
* console.log(buf.includes(Buffer.from('a buffer example')));
|
||
* // Prints: false
|
||
* console.log(buf.includes(Buffer.from('a buffer example').slice(0, 8)));
|
||
* // Prints: true
|
||
* console.log(buf.includes('this', 4));
|
||
* // Prints: false
|
||
* ```
|
||
* @since v5.3.0
|
||
* @param value What to search for.
|
||
* @param [byteOffset=0] Where to begin searching in `buf`. If negative, then offset is calculated from the end of `buf`.
|
||
* @param [encoding='utf8'] If `value` is a string, this is its encoding.
|
||
* @return `true` if `value` was found in `buf`, `false` otherwise.
|
||
*/
|
||
includes(
|
||
value: string | number | Buffer,
|
||
byteOffset?: number,
|
||
encoding?: Encoding,
|
||
): boolean;
|
||
/**
|
||
* Creates and returns an [iterator](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Iteration_protocols) of `buf` keys (indices).
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.from('buffer');
|
||
*
|
||
* for (const key of buf.keys()) {
|
||
* console.log(key);
|
||
* }
|
||
* // Prints:
|
||
* // 0
|
||
* // 1
|
||
* // 2
|
||
* // 3
|
||
* // 4
|
||
* // 5
|
||
* ```
|
||
* @since v1.1.0
|
||
*/
|
||
keys(): IterableIterator<number>;
|
||
/**
|
||
* Creates and returns an [iterator](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Iteration_protocols) for `buf` values (bytes). This function is
|
||
* called automatically when a `Buffer` is used in a `for..of` statement.
|
||
*
|
||
* ```js
|
||
* import { Buffer } from "ext:deno_node/internal/buffer";
|
||
*
|
||
* const buf = Buffer.from('buffer');
|
||
*
|
||
* for (const value of buf.values()) {
|
||
* console.log(value);
|
||
* }
|
||
* // Prints:
|
||
* // 98
|
||
* // 117
|
||
* // 102
|
||
* // 102
|
||
* // 101
|
||
* // 114
|
||
*
|
||
* for (const value of buf) {
|
||
* console.log(value);
|
||
* }
|
||
* // Prints:
|
||
* // 98
|
||
* // 117
|
||
* // 102
|
||
* // 102
|
||
* // 101
|
||
* // 114
|
||
* ```
|
||
* @since v1.1.0
|
||
*/
|
||
values(): IterableIterator<number>;
|
||
}
|
||
|
||
export const SlowBuffer: {
|
||
/** @deprecated since v6.0.0, use `Buffer.allocUnsafeSlow()` */
|
||
new (size: number): Buffer;
|
||
prototype: Buffer;
|
||
};
|
||
|
||
export const atob: typeof globalThis.atob;
|
||
export const Blob: Blob;
|
||
export const btoa: typeof globalThis.btoa;
|
||
export const constants: {
|
||
MAX_LENGTH: number;
|
||
MAX_STRING_LENGTH: number;
|
||
};
|
||
export const kMaxLength: number;
|
||
export const kStringMaxLength: number;
|
||
|
||
declare const exports: {
|
||
atob: typeof atob;
|
||
Blob: Blob;
|
||
btoa: typeof btoa;
|
||
Buffer: Buffer;
|
||
constants: typeof constants;
|
||
kMaxLength: typeof kMaxLength;
|
||
kStringMaxLength: typeof kStringMaxLength;
|
||
SlowBuffer: typeof SlowBuffer;
|
||
};
|
||
|
||
export default exports;
|