Function getVarintLen

pkg/util/encoding/encoding.go:261–279

getVarintLen returns the encoded length of an encoded varint. Assumes the slice has at least one byte.

(b []byte)

// getVarintLen returns the encoded length of an encoded varint. Assumes the
// slice has at least one byte.
func getVarintLen(b []byte) (int, error) {
	length := int(b[0]) - intZero
	if length >= 0 {
		if length <= intSmall {
			// just the tag
			return 1, nil
		}
		// tag and length-intSmall bytes
		length = 1 + length - intSmall
	} else {
		// tag and -length bytes
		length = 1 - length
	}

	if length > len(b) {
		return 0, errors.Errorf("varint length %d exceeds slice length %d", length, len(b))
	}
	return length, nil
}

// DecodeVarintAscending decodes a value encoded by EncodeVaringAscending.
func DecodeVarintAscending(b []byte) ([]byte, int64, error) {