Brunobkr/llama.cpp_AlgMor24_github

1'use strict';2 3var $TypeError = require('es-errors/type');4var callBound = require('call-bound');5var isLeadingSurrogate = require('../helpers/isLeadingSurrogate');6var isTrailingSurrogate = require('../helpers/isTrailingSurrogate');7 8var UTF16SurrogatePairToCodePoint = require('./UTF16SurrogatePairToCodePoint');9 10var $charAt = callBound('String.prototype.charAt');11var $charCodeAt = callBound('String.prototype.charCodeAt');12 13// https://262.ecma-international.org/12.0/#sec-codepointat14 15module.exports = function CodePointAt(string, position) {16	if (typeof string !== 'string') {17		throw new $TypeError('Assertion failed: `string` must be a String');18	}19	var size = string.length;20	if (position < 0 || position >= size) {21		throw new $TypeError('Assertion failed: `position` must be >= 0, and < the length of `string`');22	}23	var first = $charCodeAt(string, position);24	var cp = $charAt(string, position);25	var firstIsLeading = isLeadingSurrogate(first);26	var firstIsTrailing = isTrailingSurrogate(first);27	if (!firstIsLeading && !firstIsTrailing) {28		return {29			'[[CodePoint]]': cp,30			'[[CodeUnitCount]]': 1,31			'[[IsUnpairedSurrogate]]': false32		};33	}34	if (firstIsTrailing || (position + 1 === size)) {35		return {36			'[[CodePoint]]': cp,37			'[[CodeUnitCount]]': 1,38			'[[IsUnpairedSurrogate]]': true39		};40	}41	var second = $charCodeAt(string, position + 1);42	if (!isTrailingSurrogate(second)) {43		return {44			'[[CodePoint]]': cp,45			'[[CodeUnitCount]]': 1,46			'[[IsUnpairedSurrogate]]': true47		};48	}49 50	return {51		'[[CodePoint]]': UTF16SurrogatePairToCodePoint(first, second),52		'[[CodeUnitCount]]': 2,53		'[[IsUnpairedSurrogate]]': false54	};55};56