/*
* Copyright (c) 2018 Rafael da Silva Rocha.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*/
/**
* @fileoverview The utf8-buffer-size API.
* @see https://github.com/rochars/utf8-buffer-size
*/
/** @module utf8BufferSize */
/**
* Returns how many bytes are needed to serialize a UTF-8 string.
* @see https://encoding.spec.whatwg.org/#utf-8-encoder
* @param {string} str The string to pack.
* @return {number} The number of bytes needed to serialize the string.
*/
export default function utf8BufferSize(str) {
/** @type {number} */
let bytes = 0;
for (let i = 0, len = str.length; i < len; i++) {
/** @type {number} */
let codePoint = str.codePointAt(i);
if (codePoint < 128) {
bytes++;
} else {
if (codePoint <= 2047) {
bytes++;
} else if(codePoint <= 65535) {
bytes+=2;
} else if(codePoint <= 1114111) {
i++;
bytes+=3;
}
bytes++;
}
}
return bytes;
}