digest

func DigestStruct ¶

func DigestStruct(input interface{}, sumFunc SumFunc) []byte

This package supports the digesting on struct:

type MyStruct type {
	Name string `digest:1`
	Age int `digest:2`
}

Constructs the struct tag and performs digesting ¶

Digesting rule on field: []byte(<field name> +'|') bytes on fields

If field is the type of "interface{}", this type would be purified into more accurate type, which makes the digesting more easy.

Supporting type on field:

buildin types of golang
pointers of buildin types of golang

array types(element could be any type or pointer types)

the type implementing Digestor

"interface{}"

Fields could implement Digestor for customized bytes of your object:

type sha1String string
func (s sha1String) GetDigest() []byte {
	digest := sha1.Sum([]byte(s))
	return digest[:]
}

According to the "sequence" part of tag value, the digest value of every field would be concated to a stream of bytes and use sumFunc to digest the final result.

For nested structs, the inner one would be digested(by sumFunc) as stream of bytes.

For bool values:

true - []byte{ 1 }
false - []byte{ 0 }

func Md5SumFunc ¶

func Md5SumFunc(v []byte) []byte

func NoByteFunc ¶

func NoByteFunc() []byte

Gets the function provides constant no byte(empty array)

func NonZeroBytesFunc ¶

func NonZeroBytesFunc() []byte

func SumAll ¶

func SumAll(sumFunc SumFunc, rest ...Digestor) []byte

Sums all of the digestors with customized sum function

func ZeroBytesFunc ¶

func ZeroBytesFunc() []byte

Gets the function provides constant zero bytes(not empty array)