Function getDecimalLen

pkg/util/encoding/decimal.go:321–344

getDecimalLen returns the length of an encoded decimal.

(buf []byte)

// getDecimalLen returns the length of an encoded decimal.
func getDecimalLen(buf []byte) (int, error) {
	m := buf[0]
	p := 1
	if m < decimalNaN || m > decimalNaNDesc {
		panic(fmt.Errorf("invalid tag %d", m))
	}
	switch m {
	case decimalNaN, decimalNegativeInfinity, decimalNaNDesc, decimalInfinity, decimalZero:
		return 1, nil
	case decimalNegLarge, decimalNegSmall, decimalPosLarge, decimalPosSmall:
		// Skip the varint exponent.
		l, err := getVarintLen(buf[p:])
		if err != nil {
			return 0, err
		}
		p += l
	}

	idx, err := findDecimalTerminator(buf[p:])
	if err != nil {
		return 0, err
	}
	return p + idx + 1, nil
}

// makeDecimalFromMandE reconstructs the decimal from the mantissa M and
// exponent E.