diff --git "a/node_modules/@types/node/buffer.d.ts" "b/node_modules/@types/node/buffer.d.ts" new file mode 100644--- /dev/null +++ "b/node_modules/@types/node/buffer.d.ts" @@ -0,0 +1,2362 @@ +/** + * `Buffer` objects are used to represent a fixed-length sequence of bytes. Many + * Node.js APIs support `Buffer`s. + * + * 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 + * extends it with methods that cover additional use cases. Node.js APIs accept + * plain [`Uint8Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Uint8Array) s wherever `Buffer`s are supported as well. + * + * While the `Buffer` class is available within the global scope, it is still + * recommended to explicitly reference it via an import or require statement. + * + * ```js + * import { Buffer } from 'node:buffer'; + * + * // Creates a zero-filled Buffer of length 10. + * const buf1 = Buffer.alloc(10); + * + * // Creates a Buffer of length 10, + * // filled with bytes which all have the value `1`. + * const buf2 = Buffer.alloc(10, 1); + * + * // Creates an uninitialized buffer of length 10. + * // This is faster than calling Buffer.alloc() but the returned + * // Buffer instance might contain old data that needs to be + * // overwritten using fill(), write(), or other functions that fill the Buffer's + * // contents. + * const buf3 = Buffer.allocUnsafe(10); + * + * // Creates a Buffer containing the bytes [1, 2, 3]. + * const buf4 = Buffer.from([1, 2, 3]); + * + * // Creates a Buffer containing the bytes [1, 1, 1, 1] – the entries + * // are all truncated using `(value & 255)` to fit into the range 0–255. + * const buf5 = Buffer.from([257, 257.5, -255, '1']); + * + * // Creates a Buffer containing the UTF-8-encoded bytes for the string 'tést': + * // [0x74, 0xc3, 0xa9, 0x73, 0x74] (in hexadecimal notation) + * // [116, 195, 169, 115, 116] (in decimal notation) + * const buf6 = Buffer.from('tést'); + * + * // Creates a Buffer containing the Latin-1 bytes [0x74, 0xe9, 0x73, 0x74]. + * const buf7 = Buffer.from('tést', 'latin1'); + * ``` + * @see [source](https://github.com/nodejs/node/blob/v20.2.0/lib/buffer.js) + */ +declare module "buffer" { + import { BinaryLike } from "node:crypto"; + import { ReadableStream as WebReadableStream } from "node:stream/web"; + /** + * This function returns `true` if `input` contains only valid UTF-8-encoded data, + * including the case in which `input` is empty. + * + * Throws if the `input` is a detached array buffer. + * @since v19.4.0, v18.14.0 + * @param input The input to validate. + */ + export function isUtf8(input: Buffer | ArrayBuffer | NodeJS.TypedArray): boolean; + /** + * This function returns `true` if `input` contains only valid ASCII-encoded data, + * including the case in which `input` is empty. + * + * Throws if the `input` is a detached array buffer. + * @since v19.6.0, v18.15.0 + * @param input The input to validate. + */ + export function isAscii(input: Buffer | ArrayBuffer | NodeJS.TypedArray): boolean; + export const INSPECT_MAX_BYTES: number; + export const kMaxLength: number; + export const kStringMaxLength: number; + export const constants: { + MAX_LENGTH: number; + MAX_STRING_LENGTH: number; + }; + export type TranscodeEncoding = + | "ascii" + | "utf8" + | "utf-8" + | "utf16le" + | "utf-16le" + | "ucs2" + | "ucs-2" + | "latin1" + | "binary"; + /** + * Re-encodes the given `Buffer` or `Uint8Array` instance from one character + * encoding to another. Returns a new `Buffer` instance. + * + * Throws if the `fromEnc` or `toEnc` specify invalid character encodings or if + * conversion from `fromEnc` to `toEnc` is not permitted. + * + * Encodings supported by `buffer.transcode()` are: `'ascii'`, `'utf8'`,`'utf16le'`, `'ucs2'`, `'latin1'`, and `'binary'`. + * + * The transcoding process will use substitution characters if a given byte + * sequence cannot be adequately represented in the target encoding. For instance: + * + * ```js + * import { Buffer, transcode } from 'node:buffer'; + * + * const newBuf = transcode(Buffer.from('€'), 'utf8', 'ascii'); + * console.log(newBuf.toString('ascii')); + * // Prints: '?' + * ``` + * + * Because the Euro (`€`) sign is not representable in US-ASCII, it is replaced + * with `?` in the transcoded `Buffer`. + * @since v7.1.0 + * @param source A `Buffer` or `Uint8Array` instance. + * @param fromEnc The current encoding. + * @param toEnc To target encoding. + */ + export function transcode(source: Uint8Array, fromEnc: TranscodeEncoding, toEnc: TranscodeEncoding): Buffer; + export const SlowBuffer: { + /** @deprecated since v6.0.0, use `Buffer.allocUnsafeSlow()` */ + new(size: number): Buffer; + prototype: Buffer; + }; + /** + * Resolves a `'blob:nodedata:...'` an associated `Blob` object registered using + * a prior call to `URL.createObjectURL()`. + * @since v16.7.0 + * @experimental + * @param id A `'blob:nodedata:...` URL string returned by a prior call to `URL.createObjectURL()`. + */ + export function resolveObjectURL(id: string): Blob | undefined; + export { Buffer }; + /** + * @experimental + */ + export interface BlobOptions { + /** + * @default 'utf8' + */ + encoding?: BufferEncoding | undefined; + /** + * The Blob content-type. The intent is for `type` to convey + * the MIME media type of the data, however no validation of the type format + * is performed. + */ + type?: string | undefined; + } + /** + * A [`Blob`](https://developer.mozilla.org/en-US/docs/Web/API/Blob) encapsulates immutable, raw data that can be safely shared across + * multiple worker threads. + * @since v15.7.0, v14.18.0 + */ + export class Blob { + /** + * The total size of the `Blob` in bytes. + * @since v15.7.0, v14.18.0 + */ + readonly size: number; + /** + * The content-type of the `Blob`. + * @since v15.7.0, v14.18.0 + */ + readonly type: string; + /** + * Creates a new `Blob` object containing a concatenation of the given sources. + * + * {ArrayBuffer}, {TypedArray}, {DataView}, and {Buffer} sources are copied into + * the 'Blob' and can therefore be safely modified after the 'Blob' is created. + * + * String sources are also copied into the `Blob`. + */ + constructor(sources: Array, options?: BlobOptions); + /** + * Returns a promise that fulfills with an [ArrayBuffer](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer) containing a copy of + * the `Blob` data. + * @since v15.7.0, v14.18.0 + */ + arrayBuffer(): Promise; + /** + * Creates and returns a new `Blob` containing a subset of this `Blob` objects + * data. The original `Blob` is not altered. + * @since v15.7.0, v14.18.0 + * @param start The starting index. + * @param end The ending index. + * @param type The content-type for the new `Blob` + */ + slice(start?: number, end?: number, type?: string): Blob; + /** + * Returns a promise that fulfills with the contents of the `Blob` decoded as a + * UTF-8 string. + * @since v15.7.0, v14.18.0 + */ + text(): Promise; + /** + * Returns a new `ReadableStream` that allows the content of the `Blob` to be read. + * @since v16.7.0 + */ + stream(): WebReadableStream; + } + export interface FileOptions { + /** + * One of either `'transparent'` or `'native'`. When set to `'native'`, line endings in string source parts will be + * converted to the platform native line-ending as specified by `require('node:os').EOL`. + */ + endings?: "native" | "transparent"; + /** The File content-type. */ + type?: string; + /** The last modified date of the file. `Default`: Date.now(). */ + lastModified?: number; + } + /** + * A [`File`](https://developer.mozilla.org/en-US/docs/Web/API/File) provides information about files. + * @since v19.2.0, v18.13.0 + */ + export class File extends Blob { + constructor(sources: Array, fileName: string, options?: FileOptions); + /** + * The name of the `File`. + * @since v19.2.0, v18.13.0 + */ + readonly name: string; + /** + * The last modified date of the `File`. + * @since v19.2.0, v18.13.0 + */ + readonly lastModified: number; + } + export import atob = globalThis.atob; + export import btoa = globalThis.btoa; + import { Blob as NodeBlob } from "buffer"; + // This conditional type will be the existing global Blob in a browser, or + // the copy below in a Node environment. + type __Blob = typeof globalThis extends { onmessage: any; Blob: any } ? {} : NodeBlob; + global { + namespace NodeJS { + export { BufferEncoding }; + } + // Buffer class + type BufferEncoding = + | "ascii" + | "utf8" + | "utf-8" + | "utf16le" + | "utf-16le" + | "ucs2" + | "ucs-2" + | "base64" + | "base64url" + | "latin1" + | "binary" + | "hex"; + type WithImplicitCoercion = + | T + | { + valueOf(): T; + }; + /** + * Raw data is stored in instances of the Buffer class. + * A Buffer is similar to an array of integers but corresponds to a raw memory allocation outside the V8 heap. A Buffer cannot be resized. + * Valid string encodings: 'ascii'|'utf8'|'utf16le'|'ucs2'(alias of 'utf16le')|'base64'|'base64url'|'binary'(deprecated)|'hex' + */ + interface BufferConstructor { + /** + * Allocates a new buffer containing the given {str}. + * + * @param str String to store in buffer. + * @param encoding encoding to use, optional. Default is 'utf8' + * @deprecated since v10.0.0 - Use `Buffer.from(string[, encoding])` instead. + */ + new(str: string, encoding?: BufferEncoding): Buffer; + /** + * Allocates a new buffer of {size} octets. + * + * @param size count of octets to allocate. + * @deprecated since v10.0.0 - Use `Buffer.alloc()` instead (also see `Buffer.allocUnsafe()`). + */ + new(size: number): Buffer; + /** + * Allocates a new buffer containing the given {array} of octets. + * + * @param array The octets to store. + * @deprecated since v10.0.0 - Use `Buffer.from(array)` instead. + */ + new(array: Uint8Array): Buffer; + /** + * Produces a Buffer backed by the same allocated memory as + * the given {ArrayBuffer}/{SharedArrayBuffer}. + * + * @param arrayBuffer The ArrayBuffer with which to share memory. + * @deprecated since v10.0.0 - Use `Buffer.from(arrayBuffer[, byteOffset[, length]])` instead. + */ + new(arrayBuffer: ArrayBuffer | SharedArrayBuffer): Buffer; + /** + * Allocates a new buffer containing the given {array} of octets. + * + * @param array The octets to store. + * @deprecated since v10.0.0 - Use `Buffer.from(array)` instead. + */ + new(array: readonly any[]): Buffer; + /** + * Copies the passed {buffer} data onto a new {Buffer} instance. + * + * @param buffer The buffer to copy. + * @deprecated since v10.0.0 - Use `Buffer.from(buffer)` instead. + */ + new(buffer: Buffer): Buffer; + /** + * Allocates a new `Buffer` using an `array` of bytes in the range `0` – `255`. + * Array entries outside that range will be truncated to fit into it. + * + * ```js + * import { Buffer } from 'node:buffer'; + * + * // Creates a new Buffer containing the UTF-8 bytes of the string 'buffer'. + * const buf = Buffer.from([0x62, 0x75, 0x66, 0x66, 0x65, 0x72]); + * ``` + * + * If `array` is an `Array`\-like object (that is, one with a `length` property of + * type `number`), it is treated as if it is an array, unless it is a `Buffer` or + * a `Uint8Array`. This means all other `TypedArray` variants get treated as an`Array`. To create a `Buffer` from the bytes backing a `TypedArray`, use `Buffer.copyBytesFrom()`. + * + * A `TypeError` will be thrown if `array` is not an `Array` or another type + * appropriate for `Buffer.from()` variants. + * + * `Buffer.from(array)` and `Buffer.from(string)` may also use the internal`Buffer` pool like `Buffer.allocUnsafe()` does. + * @since v5.10.0 + */ + from( + arrayBuffer: WithImplicitCoercion, + byteOffset?: number, + length?: number, + ): Buffer; + /** + * Creates a new Buffer using the passed {data} + * @param data data to create a new Buffer + */ + from(data: Uint8Array | readonly number[]): Buffer; + from(data: WithImplicitCoercion): Buffer; + /** + * Creates a new Buffer containing the given JavaScript string {str}. + * If provided, the {encoding} parameter identifies the character encoding. + * If not provided, {encoding} defaults to 'utf8'. + */ + from( + str: + | WithImplicitCoercion + | { + [Symbol.toPrimitive](hint: "string"): string; + }, + encoding?: BufferEncoding, + ): Buffer; + /** + * Creates a new Buffer using the passed {data} + * @param values to create a new Buffer + */ + of(...items: number[]): Buffer; + /** + * Returns `true` if `obj` is a `Buffer`, `false` otherwise. + * + * ```js + * import { Buffer } from 'node:buffer'; + * + * Buffer.isBuffer(Buffer.alloc(10)); // true + * Buffer.isBuffer(Buffer.from('foo')); // true + * Buffer.isBuffer('a string'); // false + * Buffer.isBuffer([]); // false + * Buffer.isBuffer(new Uint8Array(1024)); // false + * ``` + * @since v0.1.101 + */ + isBuffer(obj: any): obj is Buffer; + /** + * Returns `true` if `encoding` is the name of a supported character encoding, + * or `false` otherwise. + * + * ```js + * import { Buffer } from 'node:buffer'; + * + * console.log(Buffer.isEncoding('utf8')); + * // Prints: true + * + * console.log(Buffer.isEncoding('hex')); + * // Prints: true + * + * console.log(Buffer.isEncoding('utf/8')); + * // Prints: false + * + * console.log(Buffer.isEncoding('')); + * // Prints: false + * ``` + * @since v0.9.1 + * @param encoding A character encoding name to check. + */ + isEncoding(encoding: string): encoding is BufferEncoding; + /** + * Returns the byte length of a string when encoded using `encoding`. + * 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 + * for the encoding that is used to convert the string into bytes. + * + * For `'base64'`, `'base64url'`, and `'hex'`, this function assumes valid input. + * For strings that contain non-base64/hex-encoded data (e.g. whitespace), the + * return value might be greater than the length of a `Buffer` created from the + * string. + * + * ```js + * import { Buffer } from 'node:buffer'; + * + * const str = '\u00bd + \u00bc = \u00be'; + * + * console.log(`${str}: ${str.length} characters, ` + + * `${Buffer.byteLength(str, 'utf8')} bytes`); + * // Prints: ½ + ¼ = ¾: 9 characters, 12 bytes + * ``` + * + * When `string` is a + * `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/- + * Reference/Global_Objects/TypedArray)/[`ArrayBuffer`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer)/[`SharedArrayBuffer`](https://develop- + * er.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer), the byte length as reported by `.byteLength`is returned. + * @since v0.1.90 + * @param string A value to calculate the length of. + * @param [encoding='utf8'] If `string` is a string, this is its encoding. + * @return The number of bytes contained within `string`. + */ + byteLength( + string: string | NodeJS.ArrayBufferView | ArrayBuffer | SharedArrayBuffer, + encoding?: BufferEncoding, + ): number; + /** + * Returns a new `Buffer` which is the result of concatenating all the `Buffer`instances in the `list` together. + * + * If the list has no items, or if the `totalLength` is 0, then a new zero-length`Buffer` is returned. + * + * If `totalLength` is not provided, it is calculated from the `Buffer` instances + * in `list` by adding their lengths. + * + * If `totalLength` is provided, it is coerced to an unsigned integer. If the + * combined length of the `Buffer`s in `list` exceeds `totalLength`, the result is + * truncated to `totalLength`. + * + * ```js + * import { Buffer } from 'node:buffer'; + * + * // Create a single `Buffer` from a list of three `Buffer` instances. + * + * const buf1 = Buffer.alloc(10); + * const buf2 = Buffer.alloc(14); + * const buf3 = Buffer.alloc(18); + * const totalLength = buf1.length + buf2.length + buf3.length; + * + * console.log(totalLength); + * // Prints: 42 + * + * const bufA = Buffer.concat([buf1, buf2, buf3], totalLength); + * + * console.log(bufA); + * // Prints: + * console.log(bufA.length); + * // Prints: 42 + * ``` + * + * `Buffer.concat()` may also use the internal `Buffer` pool like `Buffer.allocUnsafe()` does. + * @since v0.7.11 + * @param list List of `Buffer` or {@link Uint8Array} instances to concatenate. + * @param totalLength Total length of the `Buffer` instances in `list` when concatenated. + */ + concat(list: readonly Uint8Array[], totalLength?: number): Buffer; + /** + * Copies the underlying memory of `view` into a new `Buffer`. + * + * ```js + * const u16 = new Uint16Array([0, 0xffff]); + * const buf = Buffer.copyBytesFrom(u16, 1, 1); + * u16[1] = 0; + * console.log(buf.length); // 2 + * console.log(buf[0]); // 255 + * console.log(buf[1]); // 255 + * ``` + * @since v19.8.0 + * @param view The {TypedArray} to copy. + * @param [offset=': 0'] The starting offset within `view`. + * @param [length=view.length - offset] The number of elements from `view` to copy. + */ + copyBytesFrom(view: NodeJS.TypedArray, offset?: number, length?: number): Buffer; + /** + * Compares `buf1` to `buf2`, typically for the purpose of sorting arrays of`Buffer` instances. This is equivalent to calling `buf1.compare(buf2)`. + * + * ```js + * import { Buffer } from 'node:buffer'; + * + * const buf1 = Buffer.from('1234'); + * const buf2 = Buffer.from('0123'); + * const arr = [buf1, buf2]; + * + * console.log(arr.sort(Buffer.compare)); + * // Prints: [ , ] + * // (This result is equal to: [buf2, buf1].) + * ``` + * @since v0.11.13 + * @return Either `-1`, `0`, or `1`, depending on the result of the comparison. See `compare` for details. + */ + compare(buf1: Uint8Array, buf2: Uint8Array): -1 | 0 | 1; + /** + * Allocates a new `Buffer` of `size` bytes. If `fill` is `undefined`, the`Buffer` will be zero-filled. + * + * ```js + * import { Buffer } from 'node:buffer'; + * + * const buf = Buffer.alloc(5); + * + * console.log(buf); + * // Prints: + * ``` + * + * If `size` is larger than {@link constants.MAX_LENGTH} or smaller than 0, `ERR_OUT_OF_RANGE` is thrown. + * + * If `fill` is specified, the allocated `Buffer` will be initialized by calling `buf.fill(fill)`. + * + * ```js + * import { Buffer } from 'node:buffer'; + * + * const buf = Buffer.alloc(5, 'a'); + * + * console.log(buf); + * // Prints: + * ``` + * + * If both `fill` and `encoding` are specified, the allocated `Buffer` will be + * initialized by calling `buf.fill(fill, encoding)`. + * + * ```js + * import { Buffer } from 'node:buffer'; + * + * const buf = Buffer.alloc(11, 'aGVsbG8gd29ybGQ=', 'base64'); + * + * console.log(buf); + * // Prints: + * ``` + * + * Calling `Buffer.alloc()` can be measurably slower than the alternative `Buffer.allocUnsafe()` but ensures that the newly created `Buffer` instance + * contents will never contain sensitive data from previous allocations, including + * data that might not have been allocated for `Buffer`s. + * + * A `TypeError` will be thrown if `size` is not a number. + * @since v5.10.0 + * @param size The desired length of the new `Buffer`. + * @param [fill=0] A value to pre-fill the new `Buffer` with. + * @param [encoding='utf8'] If `fill` is a string, this is its encoding. + */ + alloc(size: number, fill?: string | Uint8Array | number, encoding?: BufferEncoding): Buffer; + /** + * Allocates a new `Buffer` of `size` bytes. If `size` is larger than {@link constants.MAX_LENGTH} or smaller than 0, `ERR_OUT_OF_RANGE` is thrown. + * + * 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 `Buffer.alloc()` instead to initialize`Buffer` instances with zeroes. + * + * ```js + * import { Buffer } from 'node:buffer'; + * + * const buf = Buffer.allocUnsafe(10); + * + * console.log(buf); + * // Prints (contents may vary): + * + * buf.fill(0); + * + * console.log(buf); + * // Prints: + * ``` + * + * A `TypeError` will be thrown if `size` is not a number. + * + * 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)`, + * and `Buffer.concat()` only when `size` is less than`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`. + */ + 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_OUT_OF_RANGE` 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 KiB 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 'node: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); + * + * 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`. + */ + 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 + */ + poolSize: number; + } + interface Buffer extends Uint8Array { + /** + * 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 'node: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?: BufferEncoding): number; + write(string: string, offset: number, encoding?: BufferEncoding): number; + write(string: string, offset: number, length: number, encoding?: BufferEncoding): 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 'node: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?: BufferEncoding, 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 'node: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: + * ``` + * @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 'node: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 'node: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: [ , , ] + * // (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 'node: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, + ): -1 | 0 | 1; + /** + * 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 'node: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 'node: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 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 'node: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 + * + * // With buf.slice(), the original buffer is modified. + * const notReallyCopiedBuf = buf.slice(); + * notReallyCopiedBuf[0]++; + * console.log(notReallyCopiedBuf.toString()); + * // Prints: cuffer + * console.log(buf.toString()); + * // Also prints: cuffer (!) + * ``` + * @since v0.3.0 + * @deprecated Use `subarray` instead. + * @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 'node: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 'node: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 'node:buffer'; + * + * const buf = Buffer.allocUnsafe(8); + * + * buf.writeBigInt64BE(0x0102030405060708n, 0); + * + * console.log(buf); + * // Prints: + * ``` + * @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 'node:buffer'; + * + * const buf = Buffer.allocUnsafe(8); + * + * buf.writeBigInt64LE(0x0102030405060708n, 0); + * + * console.log(buf); + * // Prints: + * ``` + * @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 'node:buffer'; + * + * const buf = Buffer.allocUnsafe(8); + * + * buf.writeBigUInt64BE(0xdecafafecacefaden, 0); + * + * console.log(buf); + * // Prints: + * ``` + * @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; + /** + * @alias Buffer.writeBigUInt64BE + * @since v14.10.0, v12.19.0 + */ + writeBigUint64BE(value: bigint, offset?: number): number; + /** + * Writes `value` to `buf` at the specified `offset` as little-endian + * + * ```js + * import { Buffer } from 'node:buffer'; + * + * const buf = Buffer.allocUnsafe(8); + * + * buf.writeBigUInt64LE(0xdecafafecacefaden, 0); + * + * console.log(buf); + * // Prints: + * ``` + * + * 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; + /** + * @alias Buffer.writeBigUInt64LE + * @since v14.10.0, v12.19.0 + */ + 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 'node:buffer'; + * + * const buf = Buffer.allocUnsafe(6); + * + * buf.writeUIntLE(0x1234567890ab, 0, 6); + * + * console.log(buf); + * // Prints: + * ``` + * @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; + /** + * @alias Buffer.writeUIntLE + * @since v14.9.0, v12.19.0 + */ + 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 'node:buffer'; + * + * const buf = Buffer.allocUnsafe(6); + * + * buf.writeUIntBE(0x1234567890ab, 0, 6); + * + * console.log(buf); + * // Prints: + * ``` + * @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; + /** + * @alias Buffer.writeUIntBE + * @since v14.9.0, v12.19.0 + */ + 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 'node:buffer'; + * + * const buf = Buffer.allocUnsafe(6); + * + * buf.writeIntLE(0x1234567890ab, 0, 6); + * + * console.log(buf); + * // Prints: + * ``` + * @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 'node:buffer'; + * + * const buf = Buffer.allocUnsafe(6); + * + * buf.writeIntBE(0x1234567890ab, 0, 6); + * + * console.log(buf); + * // Prints: + * ``` + * @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 'node: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; + /** + * @alias Buffer.readBigUInt64BE + * @since v14.10.0, v12.19.0 + */ + 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 'node: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; + /** + * @alias Buffer.readBigUInt64LE + * @since v14.10.0, v12.19.0 + */ + 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 'node: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; + /** + * @alias Buffer.readUIntLE + * @since v14.9.0, v12.19.0 + */ + 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 'node: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; + /** + * @alias Buffer.readUIntBE + * @since v14.9.0, v12.19.0 + */ + 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 'node: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 'node: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 'node: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; + /** + * @alias Buffer.readUInt8 + * @since v14.9.0, v12.19.0 + */ + 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 'node: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; + /** + * @alias Buffer.readUInt16LE + * @since v14.9.0, v12.19.0 + */ + 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 'node: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; + /** + * @alias Buffer.readUInt16BE + * @since v14.9.0, v12.19.0 + */ + 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 'node: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; + /** + * @alias Buffer.readUInt32LE + * @since v14.9.0, v12.19.0 + */ + 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 'node: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; + /** + * @alias Buffer.readUInt32BE + * @since v14.9.0, v12.19.0 + */ + 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 'node: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 'node: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 'node: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 'node: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 'node: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 'node: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 'node: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 'node: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 'node: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 'node:buffer'; + * + * const buf1 = Buffer.from([0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8]); + * + * console.log(buf1); + * // Prints: + * + * buf1.swap16(); + * + * console.log(buf1); + * // Prints: + * + * 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 'node: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 'node:buffer'; + * + * const buf1 = Buffer.from([0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8]); + * + * console.log(buf1); + * // Prints: + * + * buf1.swap32(); + * + * console.log(buf1); + * // Prints: + * + * 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 'node:buffer'; + * + * const buf1 = Buffer.from([0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8]); + * + * console.log(buf1); + * // Prints: + * + * buf1.swap64(); + * + * console.log(buf1); + * // Prints: + * + * 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 'node: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: + * ``` + * @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; + /** + * @alias Buffer.writeUInt8 + * @since v14.9.0, v12.19.0 + */ + 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 'node:buffer'; + * + * const buf = Buffer.allocUnsafe(4); + * + * buf.writeUInt16LE(0xdead, 0); + * buf.writeUInt16LE(0xbeef, 2); + * + * console.log(buf); + * // Prints: + * ``` + * @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; + /** + * @alias Buffer.writeUInt16LE + * @since v14.9.0, v12.19.0 + */ + 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 'node:buffer'; + * + * const buf = Buffer.allocUnsafe(4); + * + * buf.writeUInt16BE(0xdead, 0); + * buf.writeUInt16BE(0xbeef, 2); + * + * console.log(buf); + * // Prints: + * ``` + * @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; + /** + * @alias Buffer.writeUInt16BE + * @since v14.9.0, v12.19.0 + */ + 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 'node:buffer'; + * + * const buf = Buffer.allocUnsafe(4); + * + * buf.writeUInt32LE(0xfeedface, 0); + * + * console.log(buf); + * // Prints: + * ``` + * @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; + /** + * @alias Buffer.writeUInt32LE + * @since v14.9.0, v12.19.0 + */ + 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 'node:buffer'; + * + * const buf = Buffer.allocUnsafe(4); + * + * buf.writeUInt32BE(0xfeedface, 0); + * + * console.log(buf); + * // Prints: + * ``` + * @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; + /** + * @alias Buffer.writeUInt32BE + * @since v14.9.0, v12.19.0 + */ + 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 'node:buffer'; + * + * const buf = Buffer.allocUnsafe(2); + * + * buf.writeInt8(2, 0); + * buf.writeInt8(-2, 1); + * + * console.log(buf); + * // Prints: + * ``` + * @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 'node:buffer'; + * + * const buf = Buffer.allocUnsafe(2); + * + * buf.writeInt16LE(0x0304, 0); + * + * console.log(buf); + * // Prints: + * ``` + * @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 'node:buffer'; + * + * const buf = Buffer.allocUnsafe(2); + * + * buf.writeInt16BE(0x0102, 0); + * + * console.log(buf); + * // Prints: + * ``` + * @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 'node:buffer'; + * + * const buf = Buffer.allocUnsafe(4); + * + * buf.writeInt32LE(0x05060708, 0); + * + * console.log(buf); + * // Prints: + * ``` + * @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 'node:buffer'; + * + * const buf = Buffer.allocUnsafe(4); + * + * buf.writeInt32BE(0x01020304, 0); + * + * console.log(buf); + * // Prints: + * ``` + * @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 'node:buffer'; + * + * const buf = Buffer.allocUnsafe(4); + * + * buf.writeFloatLE(0xcafebabe, 0); + * + * console.log(buf); + * // Prints: + * ``` + * @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 'node:buffer'; + * + * const buf = Buffer.allocUnsafe(4); + * + * buf.writeFloatBE(0xcafebabe, 0); + * + * console.log(buf); + * // Prints: + * ``` + * @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 'node:buffer'; + * + * const buf = Buffer.allocUnsafe(8); + * + * buf.writeDoubleLE(123.456, 0); + * + * console.log(buf); + * // Prints: + * ``` + * @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 'node:buffer'; + * + * const buf = Buffer.allocUnsafe(8); + * + * buf.writeDoubleBE(123.456, 0); + * + * console.log(buf); + * // Prints: + * ``` + * @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 'node:buffer'; + * + * // Fill a `Buffer` with the ASCII character 'h'. + * + * const b = Buffer.allocUnsafe(50).fill('h'); + * + * console.log(b.toString()); + * // Prints: hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh + * + * // Fill a buffer with empty string + * const c = Buffer.allocUnsafe(5).fill(''); + * + * console.log(c.fill('')); + * // Prints: + * ``` + * + * `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 'node:buffer'; + * + * // Fill a `Buffer` with character that takes up two bytes in UTF-8. + * + * console.log(Buffer.allocUnsafe(5).fill('\u0222')); + * // Prints: + * ``` + * + * If `value` contains invalid characters, it is truncated; if no valid + * fill data remains, an exception is thrown: + * + * ```js + * import { Buffer } from 'node:buffer'; + * + * const buf = Buffer.allocUnsafe(5); + * + * console.log(buf.fill('a')); + * // Prints: + * console.log(buf.fill('aazz', 'hex')); + * // Prints: + * console.log(buf.fill('zz', 'hex')); + * // Throws an exception. + * ``` + * @since v0.5.0 + * @param value The value with which to fill `buf`. Empty value (string, Uint8Array, Buffer) is coerced to `0`. + * @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?: BufferEncoding): 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.subarray`. + * * a number, `value` will be interpreted as an unsigned 8-bit integer + * value between `0` and `255`. + * + * ```js + * import { Buffer } from 'node: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 'node: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?: BufferEncoding): number; + /** + * Identical to `buf.indexOf()`, except the last occurrence of `value` is found + * rather than the first occurrence. + * + * ```js + * import { Buffer } from 'node: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 'node: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?: BufferEncoding): 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 'node: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 'node: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?: BufferEncoding): 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 'node: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; + /** + * 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 'node: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; + } + var Buffer: BufferConstructor; + /** + * Decodes a string of Base64-encoded data into bytes, and encodes those bytes + * into a string using Latin-1 (ISO-8859-1). + * + * The `data` may be any JavaScript-value that can be coerced into a string. + * + * **This function is only provided for compatibility with legacy web platform APIs** + * **and should never be used in new code, because they use strings to represent** + * **binary data and predate the introduction of typed arrays in JavaScript.** + * **For code running using Node.js APIs, converting between base64-encoded strings** + * **and binary data should be performed using `Buffer.from(str, 'base64')` and`buf.toString('base64')`.** + * @since v15.13.0, v14.17.0 + * @legacy Use `Buffer.from(data, 'base64')` instead. + * @param data The Base64-encoded input string. + */ + function atob(data: string): string; + /** + * Decodes a string into bytes using Latin-1 (ISO-8859), and encodes those bytes + * into a string using Base64. + * + * The `data` may be any JavaScript-value that can be coerced into a string. + * + * **This function is only provided for compatibility with legacy web platform APIs** + * **and should never be used in new code, because they use strings to represent** + * **binary data and predate the introduction of typed arrays in JavaScript.** + * **For code running using Node.js APIs, converting between base64-encoded strings** + * **and binary data should be performed using `Buffer.from(str, 'base64')` and`buf.toString('base64')`.** + * @since v15.13.0, v14.17.0 + * @legacy Use `buf.toString('base64')` instead. + * @param data An ASCII (Latin1) string. + */ + function btoa(data: string): string; + interface Blob extends __Blob {} + /** + * `Blob` class is a global reference for `require('node:buffer').Blob` + * https://nodejs.org/api/buffer.html#class-blob + * @since v18.0.0 + */ + var Blob: typeof globalThis extends { + onmessage: any; + Blob: infer T; + } ? T + : typeof NodeBlob; + } +} +declare module "node:buffer" { + export * from "buffer"; +}