/*
*@param str輸入值
*@param boolean[asstring=false]設置爲true以返回哈希值爲8位十六進制字符串而不是整數
*@param integer[seed]可選地傳遞前一塊的哈希
*@返回整數字符串
*/
hashFnv32a(str, asString, seed) {
/*jshint bitwise:false */
var i, l,
hval = (seed === undefined) ? 0x811c9dc5 : seed;
for (i = 0, l = str.length; i < l; i++) {
hval ^= str.charCodeAt(i);
hval += (hval << 1) + (hval << 4) + (hval << 7) + (hval << 8) + (hval << 24);
}
if (asString) {
// Convert to 8 digit hex string
return ("0000000" + (hval >>> 0).toString(16)).substr(-8);
}
return hval >>> 0;
}