Current File : //usr/share/nodejs/@types/node/string_decoder.d.ts
/**
* 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";
}
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