func TestAndInt32(t *testing.T) {
	var x struct {
		before int32
		i      int32
		after  int32
	}
	x.before = magic32
	x.after = magic32
	x.i = -1
	j := x.i
	for mask := int32(1); mask != 0; mask <<= 1 {
		old := x.i
		k := AndInt32(&x.i, ^mask)
		j &= ^mask
		if x.i != j || k != old {
			t.Fatalf("mask=%d i=%d j=%d k=%d old=%d", mask, x.i, j, k, old)
		}
	}
	if x.before != magic32 || x.after != magic32 {

	v := BaseOptions{}
	b.ReportAllocs()
	b.ResetTimer()
	for i := 0; i < b.N; i++ {
		v.MarshalMsg(nil)
	}
}

func BenchmarkAppendMsgBaseOptions(b *testing.B) {
	v := BaseOptions{}
	bts := make([]byte, 0, v.Msgsize())
	bts, _ = v.MarshalMsg(bts[0:0])
	b.SetBytes(int64(len(bts)))
	b.ReportAllocs()
	b.ResetTimer()
	for i := 0; i < b.N; i++ {
		bts, _ = v.MarshalMsg(bts[0:0])
	}
}

	// In this backward scan, c0 == text[i] and c1 == text[i+1].
	// By scanning backward, we can keep track of whether the current
	// position is type-S or type-L according to the usual definition:
	//
	//	- position len(text) is type S with text[len(text)] == -1 (the sentinel)
	//	- position i is type S if text[i] < text[i+1], or if text[i] == text[i+1] && i+1 is type S.

	i -= len(m.Hostname)
	copy(dAtA[i:], m.Hostname)
	i = encodeVarintGenerated(dAtA, i, uint64(len(m.Hostname)))
	i--
	dAtA[i] = 0x1
	i--
	dAtA[i] = 0x82
	i--
	if m.HostIPC {
		dAtA[i] = 1
	} else {
		dAtA[i] = 0
	}
	i--
	dAtA[i] = 0x68
	i--
	if m.HostPID {
		dAtA[i] = 1
	} else {
		dAtA[i] = 0
	}
	i--
	dAtA[i] = 0x60
	i--
	if m.HostNetwork {
		dAtA[i] = 1

	i -= len(m.Hostname)
	copy(dAtA[i:], m.Hostname)
	i = encodeVarintGenerated(dAtA, i, uint64(len(m.Hostname)))
	i--
	dAtA[i] = 0x1
	i--
	dAtA[i] = 0x82
	i--
	if m.HostIPC {
		dAtA[i] = 1
	} else {
		dAtA[i] = 0
	}
	i--
	dAtA[i] = 0x68
	i--
	if m.HostPID {
		dAtA[i] = 1
	} else {
		dAtA[i] = 0
	}
	i--
	dAtA[i] = 0x60
	i--
	if m.HostNetwork {
		dAtA[i] = 1

	i := len(dAtA)
	_ = i
	var l int
	_ = l
	i -= len(m.UID)
	copy(dAtA[i:], m.UID)
	i = encodeVarintGenerated(dAtA, i, uint64(len(m.UID)))
	i--
	dAtA[i] = 0x22
	i -= len(m.Name)
	copy(dAtA[i:], m.Name)
	i = encodeVarintGenerated(dAtA, i, uint64(len(m.Name)))
	i--
	dAtA[i] = 0x1a
	i -= len(m.APIVersion)
	copy(dAtA[i:], m.APIVersion)

}

type Bitmap []uint32

// set the i-th bit.
func (bm Bitmap) Set(i Sym) {
	n, r := uint(i)/32, uint(i)%32
	bm[n] |= 1 << r
}

// unset the i-th bit.
func (bm Bitmap) Unset(i Sym) {
	n, r := uint(i)/32, uint(i)%32
	bm[n] &^= (1 << r)
}

// whether the i-th bit is set.
func (bm Bitmap) Has(i Sym) bool {
	n, r := uint(i)/32, uint(i)%32
	return bm[n]&(1<<r) != 0
}

			baseI := i
			i -= len(v)
			copy(dAtA[i:], v)
			i = encodeVarintGenerated(dAtA, i, uint64(len(v)))
			i--
			dAtA[i] = 0x12
			i -= len(keysForDeprecatedTopology[iNdEx])
			copy(dAtA[i:], keysForDeprecatedTopology[iNdEx])
			i = encodeVarintGenerated(dAtA, i, uint64(len(keysForDeprecatedTopology[iNdEx])))
			i--
			dAtA[i] = 0xa
			i = encodeVarintGenerated(dAtA, i, uint64(baseI-i))

					data := sd.data[:j]
					for i := 0; i < b.N; i++ {
						FieldsFunc(data, unicode.IsSpace)
					}
				})
			}
		})
	}
}

func BenchmarkSplitEmptySeparator(b *testing.B) {
	for i := 0; i < b.N; i++ {
		Split(benchInputHard, "")
	}
}

func BenchmarkSplitSingleByteSeparator(b *testing.B) {
	for i := 0; i < b.N; i++ {
		Split(benchInputHard, "/")
	}
}

				return layout[0:i], std0x[layout[i+1]-'1'], layout[i+2:]
			}
			if len(layout) >= i+3 && layout[i+1] == '0' && layout[i+2] == '2' {
				return layout[0:i], stdZeroYearDay, layout[i+3:]
			}

		case '1': // 15, 1
			if len(layout) >= i+2 && layout[i+1] == '5' {
				return layout[0:i], stdHour, layout[i+2:]
			}
			return layout[0:i], stdNumMonth, layout[i+1:]