sheetjs/bits/05_buf.js

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var has_buf = (typeof Buffer !== 'undefined');
function new_raw_buf(len/*:number*/) {
/* jshint -W056 */
return new (has_buf ? Buffer : Array)(len);
/* jshint +W056 */
}
function s2a(s/*:string*/) {
if(has_buf) return new Buffer(s, "binary");
return s.split("").map(function(x){ return x.charCodeAt(0) & 0xff; });
}
var bconcat = function(bufs) { return [].concat.apply([], bufs); };
var chr0 = /\u0000/g, chr1 = /[\u0001-\u0006]/;