Function JoinLenPrefix

lib/util.go:775–800

JoinLenPrefix() appends the items together separated by a single byte to represent the length of the segment

(toAppend ...[]byte)

// JoinLenPrefix() appends the items together separated by a single byte to represent the length of the segment
func JoinLenPrefix(toAppend ...[]byte) []byte {
	// calculate total length first
	totalLen := 0
	for _, item := range toAppend {
		// if the item isn't empty, calculate the size
		if item != nil {
			// 1 byte for length + item length
			totalLen += 1 + len(item)
		}
	}
	// make the proper size buffer
	res := make([]byte, 0, totalLen)
	// iterate through each 'segment' and append it
	for _, item := range toAppend {
		// if item is empty, skip
		if item == nil {
			continue
		}
		// length
		res = append(res, byte(len(item)))
		// item
		res = append(res, item...)
	}
	// return the result
	return res
}

// DecodeLengthPrefixed() decodes a key that is delimited by the length of the segment in a single byte
func DecodeLengthPrefixed(key []byte) (segments [][]byte) {