vex

Vex is a variable-length, lexicographically-sortable hex format for uint64 values. It can be used instead of fmt.Sprintf("%016x", v) for shorter strings.

Usage

Values can be formatted to strings using the Format() function and formatted strings can be parsed using the Parse() function. Easy peasy.

Format(v uint64) string
Parse(s string) (uint64, error)

How it works

Vex simply formats a value as an unpadded hex-encoded number and then prepends the length of the resulting string (minus 1) as a hex value.

Here are some examples of encodings:

DECIMAL   HEX   VEX    ZERO-PADDED
0         0     00     0000000000000000
1         1     01     0000000000000001
2         2     02     0000000000000002
10        a     0a     000000000000000a
15        f     0f     000000000000000f
16        10    110    0000000000000010
288       120   2120   0000000000000120