1 /*
  2  * isBlank.js - Character type is blank
  3  *
  4  * Copyright © 2012-2015, 2018, JEDLSoft
  5  *
  6  * Licensed under the Apache License, Version 2.0 (the "License");
  7  * you may not use this file except in compliance with the License.
  8  * You may obtain a copy of the License at
  9  *
 10  *     http://www.apache.org/licenses/LICENSE-2.0
 11  *
 12  * Unless required by applicable law or agreed to in writing, software
 13  * distributed under the License is distributed on an "AS IS" BASIS,
 14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 15  *
 16  * See the License for the specific language governing permissions and
 17  * limitations under the License.
 18  */
 19 
 20 // !data ctype
 21 
 22 var ilib = require("./ilib.js");
 23 var CType = require("./CType.js");
 24 var IString = require("./IString.js");
 25 
 26 /**
 27  * Return whether or not the first character is a blank character.<p>
 28  *
 29  * @static
 30  * ie. a space or a tab.
 31  * @param {string|IString|number} ch character or code point to examine
 32  * @return {boolean} true if the first character is a blank character.
 33  */
 34 var isBlank = function (ch) {
 35     var num;
 36     switch (typeof(ch)) {
 37         case 'number':
 38             num = ch;
 39             break;
 40         case 'string':
 41             num = IString.toCodePoint(ch, 0);
 42             break;
 43         case 'undefined':
 44             return false;
 45         default:
 46             num = ch._toCodePoint(0);
 47             break;
 48     }
 49     return ilib.data.ctype ? CType._inRange(num, 'blank', ilib.data.ctype) : (ch === ' ' || ch === '\t');
 50 };
 51 
 52 /**
 53  * @protected
 54  * @param {boolean} sync
 55  * @param {Object|undefined} loadParams
 56  * @param {function(*)|undefined} onLoad
 57  */
 58 isBlank._init = function (sync, loadParams, onLoad) {
 59     CType._init(sync, loadParams, onLoad);
 60 };
 61 
 62 module.exports = isBlank;