将大整数/小数转换为JavaScript中有效的IPv6地址

Question

function covertToIPv6(IP)
{
       var ip = "";
       ip = ((IP >> 112 ) & 0xFFFF) + ":" + ((IP >> 96 ) & 0xFFFF) + ":" + ((IP 
         >> 80 ) & 0xFFFF) + ":" +((IP >> 64 ) & 0xFFFF) + ":" + ((IP >> 48 ) & 
         0xFFFF) + ":" + ((IP >> 32 ) & 0xFFFF) + ":" + ((IP >> 16 ) & 0xFFFF) + 
       ":"+( IP & 0xFFFF);
       console.log(ip);
}
covertToIPv6(63802943797675961899382738893456539648);

嗨，我正在尝试将大整数或小数号转换为有效的IPv6 address我已经尝试了以下功能。

这给出了所有零集

covertToIPv6(63802943797675961899382738893456539648);

ans：0：0：0：0：0：0：0：0：0

Answer 1

如果您真的无法使用BigInt或使用字符串表示形式，则是将您的大整数重新转换为IPv6地址的工作功能。但是，整数必须在字符串表示中才能起作用。

var divide = function(dividend, divisor) {
  var returnValue = "";
  var remainder = 0;
  var currentDividend = 0,
    currentQuotient;
  dividend.split("").forEach(function(digit, index) {
    // use classical digit by digit division 
    if (currentDividend !== 0) {
      currentDividend = currentDividend * 10;
    }
    currentDividend += parseInt(digit);
    if (currentDividend >= divisor) {
      currentQuotient = Math.floor(currentDividend / divisor);
      currentDividend -= currentQuotient * divisor;
      returnValue += currentQuotient.toString();
    } else if (returnValue.length > 0) {
      returnValue += "0";
    }
    if (index === dividend.length - 1) {
      remainder = currentDividend;
    }
  });
  return {
    quotient: returnValue.length === 0 ? "0" : returnValue,
    remainder: remainder
  };
};
var convertToIPv6 = function(input, base) {
  base = base || 10;
  var blocks = [];
  var blockSize = Math.pow(2, 16); // 16 bit per block
  while (blocks.length < 8) {
    var divisionResult = divide(input, blockSize);
    // The remainder is the block value
    blocks.unshift(divisionResult.remainder.toString(base));
    // The quotient will be used as dividend for the next block
    input = divisionResult.quotient;
  }
  return blocks.join(":");
};
// Examples
["63802943797675961899382738893456539648",
 "16894619001915479834806084984789761616",
 "734987203501750431791304671034703170303"
].forEach(function(input) {
  console.log("Input:", input);
  console.log("IP address (decimal):", convertToIPv6(input));
  console.log("IP address (hex):", convertToIPv6(input, 16));
});