static internal void WriteNumber(BitWriter bw, long n)
{
ulong number = (ulong)n;
if (number < 1)
{
bw.WriteBits(0, 1);
}
else if (number < 16)
{
bw.WriteBits(128 + number, 8);
}
else if (number < 256)
{
bw.WriteBits(7168 + number, 13);
}
else if (number < 4096)
{
bw.WriteBits(499712 + number, 19);
}
else if (number < 65536)
{
bw.WriteBits(1900544 + number, 21);
}
else if (number < 1048576)
{
bw.WriteBits(6291456 + number, 23);
}
else if (number < 16777216)
{
bw.WriteBits(8287944704 + number, 33);
}
else if (number < 268435456)
{
bw.WriteBits(16106127360 + number, 34);
}
else if (number < 4294967296)
{
bw.WriteBits(21474836480 + number, 35);
}
else if (number < 68719476736)
{
bw.WriteBits(618475290624 + number, 40);
}
else if (number < 1099511627776)
{
bw.WriteBits(34084860461056 + number, 45);
}
else if (number < 17592186044416)
{
bw.WriteBits(4327677766926336 + number, 52);
}
else if (number < 281474976710656)
{
bw.WriteBits(558164878817230848 + number, 59);
}
else if (number < 4503599627370496)
{
bw.WriteBits(8926134461448323072 + number, 63);
}
else if (number < 72057594037927936)
{
bw.WriteBits(1981, 11);
bw.WriteBits(number, 56);
}
else if (number < 1152921504606846976)
{
bw.WriteBits(3961, 12);
bw.WriteBits(number, 60);
}
else
{
bw.WriteBits(3960, 12);
bw.WriteBits(number, 64);
}
}