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Filename : string_decoder.d.ts
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/**
 * The `string_decoder` module provides an API for decoding `Buffer` objects into
 * strings in a manner that preserves encoded multi-byte UTF-8 and UTF-16
 * characters. It can be accessed using:
 *
 * ```js
 * const { StringDecoder } = require('string_decoder');
 * ```
 *
 * The following example shows the basic use of the `StringDecoder` class.
 *
 * ```js
 * const { StringDecoder } = require('string_decoder');
 * const decoder = new StringDecoder('utf8');
 *
 * const cent = Buffer.from([0xC2, 0xA2]);
 * console.log(decoder.write(cent));
 *
 * const euro = Buffer.from([0xE2, 0x82, 0xAC]);
 * console.log(decoder.write(euro));
 * ```
 *
 * When a `Buffer` instance is written to the `StringDecoder` instance, an
 * internal buffer is used to ensure that the decoded string does not contain
 * any incomplete multibyte characters. These are held in the buffer until the
 * next call to `stringDecoder.write()` or until `stringDecoder.end()` is called.
 *
 * In the following example, the three UTF-8 encoded bytes of the European Euro
 * symbol (`€`) are written over three separate operations:
 *
 * ```js
 * const { StringDecoder } = require('string_decoder');
 * const decoder = new StringDecoder('utf8');
 *
 * decoder.write(Buffer.from([0xE2]));
 * decoder.write(Buffer.from([0x82]));
 * console.log(decoder.end(Buffer.from([0xAC])));
 * ```
 * @see [source](https://github.com/nodejs/node/blob/v18.0.0/lib/string_decoder.js)
 */
declare module 'string_decoder' {
    class StringDecoder {
        constructor(encoding?: BufferEncoding);
        /**
         * Returns a decoded string, ensuring that any incomplete multibyte characters at
         * the end of the `Buffer`, or `TypedArray`, or `DataView` are omitted from the
         * returned string and stored in an internal buffer for the next call to`stringDecoder.write()` or `stringDecoder.end()`.
         * @since v0.1.99
         * @param buffer A `Buffer`, or `TypedArray`, or `DataView` containing the bytes to decode.
         */
        write(buffer: Buffer): string;
        /**
         * Returns any remaining input stored in the internal buffer as a string. Bytes
         * representing incomplete UTF-8 and UTF-16 characters will be replaced with
         * substitution characters appropriate for the character encoding.
         *
         * If the `buffer` argument is provided, one final call to `stringDecoder.write()`is performed before returning the remaining input.
         * After `end()` is called, the `stringDecoder` object can be reused for new input.
         * @since v0.9.3
         * @param buffer A `Buffer`, or `TypedArray`, or `DataView` containing the bytes to decode.
         */
        end(buffer?: Buffer): string;
    }
}
declare module 'node:string_decoder' {
    export * from 'string_decoder';
}