ulid_struct.hh

#pragma once

#include <chrono>
#include <cstdlib>
#include <ctime>
#include <functional>
#include <random>
#include <vector>

namespace ulid {

/**
 * ULID is a 16 byte Universally Unique Lexicographically Sortable Identifier
 * */
struct ULID {
	uint8_t data[16];

	ULID() {
		// for (int i = 0 ; i < 16 ; i++) {
		// 	data[i] = 0;
		// }

		// unrolled loop
		data[0] = 0;
		data[1] = 0;
		data[2] = 0;
		data[3] = 0;
		data[4] = 0;
		data[5] = 0;
		data[6] = 0;
		data[7] = 0;
		data[8] = 0;
		data[9] = 0;
		data[10] = 0;
		data[11] = 0;
		data[12] = 0;
		data[13] = 0;
		data[14] = 0;
		data[15] = 0;
	}

	ULID(uint64_t val) {
		// for (int i = 0 ; i < 16 ; i++) {
		// 	data[15 - i] = static_cast<uint8_t>(val);
		// 	val >>= 8;
		// }

		// unrolled loop
		data[15] = static_cast<uint8_t>(val);

		val >>= 8;
		data[14] = static_cast<uint8_t>(val);

		val >>= 8;
		data[13] = static_cast<uint8_t>(val);

		val >>= 8;
		data[12] = static_cast<uint8_t>(val);

		val >>= 8;
		data[11] = static_cast<uint8_t>(val);

		val >>= 8;
		data[10] = static_cast<uint8_t>(val);

		val >>= 8;
		data[9] = static_cast<uint8_t>(val);

		val >>= 8;
		data[8] = static_cast<uint8_t>(val);

		data[7] = 0;
		data[6] = 0;
		data[5] = 0;
		data[4] = 0;
		data[3] = 0;
		data[2] = 0;
		data[1] = 0;
		data[0] = 0;
	}

	ULID(const ULID& other) {
		// for (int i = 0 ; i < 16 ; i++) {
		// 	data[i] = other.data[i];
		// }

		// unrolled loop
		data[0] = other.data[0];
		data[1] = other.data[1];
		data[2] = other.data[2];
		data[3] = other.data[3];
		data[4] = other.data[4];
		data[5] = other.data[5];
		data[6] = other.data[6];
		data[7] = other.data[7];
		data[8] = other.data[8];
		data[9] = other.data[9];
		data[10] = other.data[10];
		data[11] = other.data[11];
		data[12] = other.data[12];
		data[13] = other.data[13];
		data[14] = other.data[14];
		data[15] = other.data[15];
	}

	ULID& operator=(const ULID& other) {
		// for (int i = 0 ; i < 16 ; i++) {
		// 	data[i] = other.data[i];
		// }

		// unrolled loop
		data[0] = other.data[0];
		data[1] = other.data[1];
		data[2] = other.data[2];
		data[3] = other.data[3];
		data[4] = other.data[4];
		data[5] = other.data[5];
		data[6] = other.data[6];
		data[7] = other.data[7];
		data[8] = other.data[8];
		data[9] = other.data[9];
		data[10] = other.data[10];
		data[11] = other.data[11];
		data[12] = other.data[12];
		data[13] = other.data[13];
		data[14] = other.data[14];
		data[15] = other.data[15];

		return *this;
	}

	ULID(ULID&& other) {
		// for (int i = 0 ; i < 16 ; i++) {
		// 	data[i] = other.data[i];
		// 	other.data[i] = 0;
		// }

		// unrolled loop
		data[0] = other.data[0];
		other.data[0] = 0;

		data[1] = other.data[1];
		other.data[1] = 0;

		data[2] = other.data[2];
		other.data[2] = 0;

		data[3] = other.data[3];
		other.data[3] = 0;

		data[4] = other.data[4];
		other.data[4] = 0;

		data[5] = other.data[5];
		other.data[5] = 0;

		data[6] = other.data[6];
		other.data[6] = 0;

		data[7] = other.data[7];
		other.data[7] = 0;

		data[8] = other.data[8];
		other.data[8] = 0;

		data[9] = other.data[9];
		other.data[9] = 0;

		data[10] = other.data[10];
		other.data[10] = 0;

		data[11] = other.data[11];
		other.data[11] = 0;

		data[12] = other.data[12];
		other.data[12] = 0;

		data[13] = other.data[13];
		other.data[13] = 0;

		data[14] = other.data[14];
		other.data[14] = 0;

		data[15] = other.data[15];
		other.data[15] = 0;
	}

	ULID& operator=(ULID&& other) {
		// for (int i = 0 ; i < 16 ; i++) {
		// 	data[i] = other.data[i];
		// 	other.data[i] = 0;
		// }

		// unrolled loop
		data[0] = other.data[0];
		other.data[0] = 0;

		data[1] = other.data[1];
		other.data[1] = 0;

		data[2] = other.data[2];
		other.data[2] = 0;

		data[3] = other.data[3];
		other.data[3] = 0;

		data[4] = other.data[4];
		other.data[4] = 0;

		data[5] = other.data[5];
		other.data[5] = 0;

		data[6] = other.data[6];
		other.data[6] = 0;

		data[7] = other.data[7];
		other.data[7] = 0;

		data[8] = other.data[8];
		other.data[8] = 0;

		data[9] = other.data[9];
		other.data[9] = 0;

		data[10] = other.data[10];
		other.data[10] = 0;

		data[11] = other.data[11];
		other.data[11] = 0;

		data[12] = other.data[12];
		other.data[12] = 0;

		data[13] = other.data[13];
		other.data[13] = 0;

		data[14] = other.data[14];
		other.data[14] = 0;

		data[15] = other.data[15];
		other.data[15] = 0;

		return *this;
	}
};

/**
 * EncodeTime will encode the first 6 bytes of a uint8_t array to the passed
 * timestamp
 * */
void EncodeTime(time_t timestamp, ULID& ulid) {
	ulid.data[0] = static_cast<uint8_t>(timestamp >> 40);
	ulid.data[1] = static_cast<uint8_t>(timestamp >> 32);
	ulid.data[2] = static_cast<uint8_t>(timestamp >> 24);
	ulid.data[3] = static_cast<uint8_t>(timestamp >> 16);
	ulid.data[4] = static_cast<uint8_t>(timestamp >> 8);
	ulid.data[5] = static_cast<uint8_t>(timestamp);
}

/**
 * EncodeTimeNow will encode a ULID using the time obtained using std::time(nullptr)
 * */
void EncodeTimeNow(ULID& ulid) {
	EncodeTime(std::time(nullptr), ulid);
}

/**
 * EncodeTimeSystemClockNow will encode a ULID using the time obtained using
 * std::chrono::system_clock::now() by taking the timestamp in milliseconds.
 * */
void EncodeTimeSystemClockNow(ULID& ulid) {
	auto now = std::chrono::system_clock::now();
	auto ms = std::chrono::duration_cast<std::chrono::milliseconds>(now.time_since_epoch());
	EncodeTime(ms.count(), ulid);
}

/**
 * EncodeEntropy will encode the last 10 bytes of the passed uint8_t array with
 * the values generated using the passed random number generator.
 * */
void EncodeEntropy(const std::function<uint8_t()>& rng, ULID& ulid) {
	ulid.data[6] = rng();
	ulid.data[7] = rng();
	ulid.data[8] = rng();
	ulid.data[9] = rng();
	ulid.data[10] = rng();
	ulid.data[11] = rng();
	ulid.data[12] = rng();
	ulid.data[13] = rng();
	ulid.data[14] = rng();
	ulid.data[15] = rng();
}

/**
 * EncodeEntropyRand will encode a ulid using std::rand
 *
 * std::rand returns values in [0, RAND_MAX]
 * */
void EncodeEntropyRand(ULID& ulid) {
	ulid.data[6] = (std::rand() * 255ull) / RAND_MAX;
	ulid.data[7] = (std::rand() * 255ull) / RAND_MAX;
	ulid.data[8] = (std::rand() * 255ull) / RAND_MAX;
	ulid.data[9] = (std::rand() * 255ull) / RAND_MAX;
	ulid.data[10] = (std::rand() * 255ull) / RAND_MAX;
	ulid.data[11] = (std::rand() * 255ull) / RAND_MAX;
	ulid.data[12] = (std::rand() * 255ull) / RAND_MAX;
	ulid.data[13] = (std::rand() * 255ull) / RAND_MAX;
	ulid.data[14] = (std::rand() * 255ull) / RAND_MAX;
	ulid.data[15] = (std::rand() * 255ull) / RAND_MAX;
}

std::uniform_int_distribution<uint8_t> Distribution_0_255(0, 255);

/**
 * EncodeEntropyMt19937 will encode a ulid using std::mt19937
 *
 * It also creates a std::uniform_int_distribution to generate values in [0, 255]
 * */
void EncodeEntropyMt19937(std::mt19937& generator, ULID& ulid) {
	ulid.data[6] = Distribution_0_255(generator);
	ulid.data[7] = Distribution_0_255(generator);
	ulid.data[8] = Distribution_0_255(generator);
	ulid.data[9] = Distribution_0_255(generator);
	ulid.data[10] = Distribution_0_255(generator);
	ulid.data[11] = Distribution_0_255(generator);
	ulid.data[12] = Distribution_0_255(generator);
	ulid.data[13] = Distribution_0_255(generator);
	ulid.data[14] = Distribution_0_255(generator);
	ulid.data[15] = Distribution_0_255(generator);
}

/**
 * Encode will create an encoded ULID with a timestamp and a generator.
 * */
void Encode(time_t timestamp, const std::function<uint8_t()>& rng, ULID& ulid) {
	EncodeTime(timestamp, ulid);
	EncodeEntropy(rng, ulid);
}

/**
 * EncodeNowRand = EncodeTimeNow + EncodeEntropyRand.
 * */
void EncodeNowRand(ULID& ulid) {
	EncodeTimeNow(ulid);
	EncodeEntropyRand(ulid);
}

/**
 * Create will create a ULID with a timestamp and a generator.
 * */
ULID Create(time_t timestamp, const std::function<uint8_t()>& rng) {
	ULID ulid;
	Encode(timestamp, rng, ulid);
	return ulid;
}

/**
 * CreateNowRand:EncodeNowRand = Create:Encode.
 * */
ULID CreateNowRand() {
	ULID ulid;
	EncodeNowRand(ulid);
	return ulid;
}

/**
 * Crockford's Base32
 * */
const char Encoding[33] = "0123456789ABCDEFGHJKMNPQRSTVWXYZ";

/**
 * MarshalTo will marshal a ULID to the passed character array.
 *
 * Implementation taken directly from oklog/ulid
 * (https://sourcegraph.com/github.com/oklog/ulid@0774f81f6e44af5ce5e91c8d7d76cf710e889ebb/-/blob/ulid.go#L162-190)
 *
 * timestamp:<br>
 * dst[0]: first 3 bits of data[0]<br>
 * dst[1]: last 5 bits of data[0]<br>
 * dst[2]: first 5 bits of data[1]<br>
 * dst[3]: last 3 bits of data[1] + first 2 bits of data[2]<br>
 * dst[4]: bits 3-7 of data[2]<br>
 * dst[5]: last bit of data[2] + first 4 bits of data[3]<br>
 * dst[6]: last 4 bits of data[3] + first bit of data[4]<br>
 * dst[7]: bits 2-6 of data[4]<br>
 * dst[8]: last 2 bits of data[4] + first 3 bits of data[5]<br>
 * dst[9]: last 5 bits of data[5]<br>
 *
 * entropy:
 * follows similarly, except now all components are set to 5 bits.
 * */
void MarshalTo(const ULID& ulid, char dst[26]) {
	// 10 byte timestamp
	dst[0] = Encoding[(ulid.data[0] & 224) >> 5];
	dst[1] = Encoding[ulid.data[0] & 31];
	dst[2] = Encoding[(ulid.data[1] & 248) >> 3];
	dst[3] = Encoding[((ulid.data[1] & 7) << 2) | ((ulid.data[2] & 192) >> 6)];
	dst[4] = Encoding[(ulid.data[2] & 62) >> 1];
	dst[5] = Encoding[((ulid.data[2] & 1) << 4) | ((ulid.data[3] & 240) >> 4)];
	dst[6] = Encoding[((ulid.data[3] & 15) << 1) | ((ulid.data[4] & 128) >> 7)];
	dst[7] = Encoding[(ulid.data[4] & 124) >> 2];
	dst[8] = Encoding[((ulid.data[4] & 3) << 3) | ((ulid.data[5] & 224) >> 5)];
	dst[9] = Encoding[ulid.data[5] & 31];

	// 16 bytes of entropy
	dst[10] = Encoding[(ulid.data[6] & 248) >> 3];
	dst[11] = Encoding[((ulid.data[6] & 7) << 2) | ((ulid.data[7] & 192) >> 6)];
	dst[12] = Encoding[(ulid.data[7] & 62) >> 1];
	dst[13] = Encoding[((ulid.data[7] & 1) << 4) | ((ulid.data[8] & 240) >> 4)];
	dst[14] = Encoding[((ulid.data[8] & 15) << 1) | ((ulid.data[9] & 128) >> 7)];
	dst[15] = Encoding[(ulid.data[9] & 124) >> 2];
	dst[16] = Encoding[((ulid.data[9] & 3) << 3) | ((ulid.data[10] & 224) >> 5)];
	dst[17] = Encoding[ulid.data[10] & 31];
	dst[18] = Encoding[(ulid.data[11] & 248) >> 3];
	dst[19] = Encoding[((ulid.data[11] & 7) << 2) | ((ulid.data[12] & 192) >> 6)];
	dst[20] = Encoding[(ulid.data[12] & 62) >> 1];
	dst[21] = Encoding[((ulid.data[12] & 1) << 4) | ((ulid.data[13] & 240) >> 4)];
	dst[22] = Encoding[((ulid.data[13] & 15) << 1) | ((ulid.data[14] & 128) >> 7)];
	dst[23] = Encoding[(ulid.data[14] & 124) >> 2];
	dst[24] = Encoding[((ulid.data[14] & 3) << 3) | ((ulid.data[15] & 224) >> 5)];
	dst[25] = Encoding[ulid.data[15] & 31];
}

/**
 * Marshal will marshal a ULID to a std::string.
 * */
std::string Marshal(const ULID& ulid) {
	char data[27];
	data[26] = '\0';
	MarshalTo(ulid, data);
	return std::string(data);
}

/**
 * MarshalBinaryTo will Marshal a ULID to the passed byte array
 * */
void MarshalBinaryTo(const ULID& ulid, uint8_t dst[16]) {
	// timestamp
	dst[0] = ulid.data[0];
	dst[1] = ulid.data[1];
	dst[2] = ulid.data[2];
	dst[3] = ulid.data[3];
	dst[4] = ulid.data[4];
	dst[5] = ulid.data[5];

	// entropy
	dst[6] = ulid.data[6];
	dst[7] = ulid.data[7];
	dst[8] = ulid.data[8];
	dst[9] = ulid.data[9];
	dst[10] = ulid.data[10];
	dst[11] = ulid.data[11];
	dst[12] = ulid.data[12];
	dst[13] = ulid.data[13];
	dst[14] = ulid.data[14];
	dst[15] = ulid.data[15];
}

/**
 * MarshalBinary will Marshal a ULID to a byte vector.
 * */
std::vector<uint8_t> MarshalBinary(const ULID& ulid) {
	std::vector<uint8_t> dst(16);
	MarshalBinaryTo(ulid, dst.data());
	return dst;
}

/**
 * dec storesdecimal encodings for characters.
 * 0xFF indicates invalid character.
 * 48-57 are digits.
 * 65-90 are capital alphabets.
 * */
const uint8_t dec[256] = {
	0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
	0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
	0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
	0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,

	0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
	0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
	/* 0     1     2     3     4     5     6     7  */
	0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
	/* 8     9                                      */
	0x08, 0x09, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,

	/*    10(A) 11(B) 12(C) 13(D) 14(E) 15(F) 16(G) */
	0xFF, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10,
	/*17(H)     18(J) 19(K)       20(M) 21(N)       */
	0x11, 0xFF, 0x12, 0x13, 0xFF, 0x14, 0x15, 0xFF,
	/*22(P)23(Q)24(R) 25(S) 26(T)       27(V) 28(W) */
	0x16, 0x17, 0x18, 0x19, 0x1A, 0xFF, 0x1B, 0x1C,
	/*29(X)30(Y)31(Z)                               */
	0x1D, 0x1E, 0x1F, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,

	0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
	0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
	0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
	0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,

	0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
	0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
	0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
	0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,

	0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
	0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
	0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
	0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,

	0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
	0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
	0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
	0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,

	0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
	0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
	0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
	0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF
};

/**
 * UnmarshalFrom will unmarshal a ULID from the passed character array.
 * */
void UnmarshalFrom(const char str[26], ULID& ulid) {
	// timestamp
	ulid.data[0] = (dec[int(str[0])] << 5) | dec[int(str[1])];
	ulid.data[1] = (dec[int(str[2])] << 3) | (dec[int(str[3])] >> 2);
	ulid.data[2] = (dec[int(str[3])] << 6) | (dec[int(str[4])] << 1) | (dec[int(str[5])] >> 4);
	ulid.data[3] = (dec[int(str[5])] << 4) | (dec[int(str[6])] >> 1);
	ulid.data[4] = (dec[int(str[6])] << 7) | (dec[int(str[7])] << 2) | (dec[int(str[8])] >> 3);
	ulid.data[5] = (dec[int(str[8])] << 5) | dec[int(str[9])];

	// entropy
	ulid.data[6] = (dec[int(str[10])] << 3) | (dec[int(str[11])] >> 2);
	ulid.data[7] = (dec[int(str[11])] << 6) | (dec[int(str[12])] << 1) | (dec[int(str[13])] >> 4);
	ulid.data[8] = (dec[int(str[13])] << 4) | (dec[int(str[14])] >> 1);
	ulid.data[9] = (dec[int(str[14])] << 7) | (dec[int(str[15])] << 2) | (dec[int(str[16])] >> 3);
	ulid.data[10] = (dec[int(str[16])] << 5) | dec[int(str[17])];
	ulid.data[11] = (dec[int(str[18])] << 3) | (dec[int(str[19])] >> 2);
	ulid.data[12] = (dec[int(str[19])] << 6) | (dec[int(str[20])] << 1) | (dec[int(str[21])] >> 4);
	ulid.data[13] = (dec[int(str[21])] << 4) | (dec[int(str[22])] >> 1);
	ulid.data[14] = (dec[int(str[22])] << 7) | (dec[int(str[23])] << 2) | (dec[int(str[24])] >> 3);
	ulid.data[15] = (dec[int(str[24])] << 5) | dec[int(str[25])];
}

/**
 * Unmarshal will create a new ULID by unmarshaling the passed string.
 * */
ULID Unmarshal(const std::string& str) {
	ULID ulid;
	UnmarshalFrom(str.c_str(), ulid);
	return ulid;
}

/**
 * UnmarshalBinaryFrom will unmarshal a ULID from the passed byte array.
 * */
void UnmarshalBinaryFrom(const uint8_t b[16], ULID& ulid) {
	// timestamp
	ulid.data[0] = b[0];
	ulid.data[1] = b[1];
	ulid.data[2] = b[2];
	ulid.data[3] = b[3];
	ulid.data[4] = b[4];
	ulid.data[5] = b[5];

	// entropy
	ulid.data[6] = b[6];
	ulid.data[7] = b[7];
	ulid.data[8] = b[8];
	ulid.data[9] = b[9];
	ulid.data[10] = b[10];
	ulid.data[11] = b[11];
	ulid.data[12] = b[12];
	ulid.data[13] = b[13];
	ulid.data[14] = b[14];
	ulid.data[15] = b[15];
}

/**
 * Unmarshal will create a new ULID by unmarshaling the passed byte vector.
 * */
ULID UnmarshalBinary(const std::vector<uint8_t>& b) {
	ULID ulid;
	UnmarshalBinaryFrom(b.data(), ulid);
	return ulid;
}

/**
 * CompareULIDs will compare two ULIDs.
 * returns:
 *     -1 if ulid1 is Lexicographically before ulid2
 *      1 if ulid1 is Lexicographically after ulid2
 *      0 if ulid1 is same as ulid2
 * */
int CompareULIDs(const ULID& ulid1, const ULID& ulid2) {
	// for (int i = 0 ; i < 16 ; i++) {
	// 	if (ulid1.data[i] != ulid2.data[i]) {
	// 		return (ulid1.data[i] < ulid2.data[i]) * -2 + 1;
	// 	}
	// }

	// unrolled loop

	if (ulid1.data[0] != ulid2.data[0]) {
		return (ulid1.data[0] < ulid2.data[0]) * -2 + 1;
	}

	if (ulid1.data[1] != ulid2.data[1]) {
		return (ulid1.data[1] < ulid2.data[1]) * -2 + 1;
	}

	if (ulid1.data[2] != ulid2.data[2]) {
		return (ulid1.data[2] < ulid2.data[2]) * -2 + 1;
	}

	if (ulid1.data[3] != ulid2.data[3]) {
		return (ulid1.data[3] < ulid2.data[3]) * -2 + 1;
	}

	if (ulid1.data[4] != ulid2.data[4]) {
		return (ulid1.data[4] < ulid2.data[4]) * -2 + 1;
	}

	if (ulid1.data[5] != ulid2.data[5]) {
		return (ulid1.data[5] < ulid2.data[5]) * -2 + 1;
	}

	if (ulid1.data[6] != ulid2.data[6]) {
		return (ulid1.data[6] < ulid2.data[6]) * -2 + 1;
	}

	if (ulid1.data[7] != ulid2.data[7]) {
		return (ulid1.data[7] < ulid2.data[7]) * -2 + 1;
	}

	if (ulid1.data[8] != ulid2.data[8]) {
		return (ulid1.data[8] < ulid2.data[8]) * -2 + 1;
	}

	if (ulid1.data[9] != ulid2.data[9]) {
		return (ulid1.data[9] < ulid2.data[9]) * -2 + 1;
	}

	if (ulid1.data[10] != ulid2.data[10]) {
		return (ulid1.data[10] < ulid2.data[10]) * -2 + 1;
	}

	if (ulid1.data[11] != ulid2.data[11]) {
		return (ulid1.data[11] < ulid2.data[11]) * -2 + 1;
	}

	if (ulid1.data[12] != ulid2.data[12]) {
		return (ulid1.data[12] < ulid2.data[12]) * -2 + 1;
	}

	if (ulid1.data[13] != ulid2.data[13]) {
		return (ulid1.data[13] < ulid2.data[13]) * -2 + 1;
	}

	if (ulid1.data[14] != ulid2.data[14]) {
		return (ulid1.data[14] < ulid2.data[14]) * -2 + 1;
	}

	if (ulid1.data[15] != ulid2.data[15]) {
		return (ulid1.data[15] < ulid2.data[15]) * -2 + 1;
	}

	return 0;
}

/**
 * Time will extract the timestamp used to generate a ULID
 * */
time_t Time(const ULID& ulid) {
	time_t ans = 0;

	ans |= ulid.data[0];

	ans <<= 8;
	ans |= ulid.data[1];

	ans <<= 8;
	ans |= ulid.data[2];

	ans <<= 8;
	ans |= ulid.data[3];

	ans <<= 8;
	ans |= ulid.data[4];

	ans <<= 8;
	ans |= ulid.data[5];

	return ans;
}

};  // namespace ulid