encoding

func IDToRef ¶

func IDToRef(id uint, prefix string, length int, refChars, refPaddingChars string) (string, error)

IDToRef convert defined ID to reference

func RefToID ¶

func RefToID(ref, prefix string, refChars, refPaddingChars string) (uint64, error)

RefToID convert defined reference to id

func String2Uint ¶

func String2Uint(s string, chars, paddingChars string) (n uint64, err error)

String2Uint is the revert of Uint2String

It returns negative result in 2 cases:
- s contains character not exist in chars
- the result is bigger than max int64 (integer overflow happen)

func Uint2String ¶

func Uint2String(number uint64, chars, paddingChars string, length int) (s string, err error)

Uint2String converts a number to a string using characters from chars.

Validation:

• `length` must > 0
• length of `chars` must >= 10
• `paddingChars` must not be empty
• `chars` & `paddingChars` must not overlap

If length of the result < required length, the result will be left padded with random characters from `paddingChars`.