copy(hm.opad, key)
	for i := range hm.ipad {
		hm.ipad[i] ^= 0x36
	}
	for i := range hm.opad {
		hm.opad[i] ^= 0x5c
	}
	hm.inner.Write(hm.ipad)

	return hm
}

// Equal compares two MACs for equality without leaking timing information.
func Equal(mac1, mac2 []byte) bool {
	// We don't have to be constant time if the lengths of the MACs are
	// different as that suggests that a completely different hash function

		m := collectLocalMetrics(types, collectMetricsOpts{
			hosts: map[string]struct{}{
				globalLocalNodeName: {},
			},
		})

		for _, hm := range m.ByHost {
			if hm.Mem != nil && len(hm.Mem.Info.Addr) > 0 {
				v = hm.Mem.Info
				break
			}
		}

		return
	}

	return cachevalue.NewFromFunc(1*time.Minute,
		cachevalue.Opts{ReturnLastGood: true},
		loadMemoryMetrics)

	var types madmin.MetricType = madmin.MetricsDisk | madmin.MetricNet | madmin.MetricsMem | madmin.MetricsCPU

	m := collectLocalMetrics(types, collectMetricsOpts{})
	for _, hm := range m.ByHost {
		if hm.Net != nil && len(hm.Net.NetStats.Name) > 0 {
			stats := hm.Net.NetStats
			labels := map[string]string{"interface": stats.Name}
			updateResourceMetrics(interfaceSubsystem, interfaceRxBytes, float64(stats.RxBytes), labels, true)

      </Filter>
      <Filter Include="Header Files">
        <!-- if you would like to add more endings to this pattern, make sure to also edit DefaultCppLibrary.java and DefaultCppComponent.java-->
        <Extensions>h;hpp;h++;hxx;hm;inl;inc;xsd</Extensions>
      </Filter>
      <Filter Include="Resource Files">
        <Extensions>rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav</Extensions>
      </Filter>
    </ItemGroup>

		}
	}
	return
}

func checkPlausibleHeapMetrics(t *testing.T, data format.Data) {
	hms := heapMetrics(data)
	var nonZeroAllocated, nonZeroNextGC bool
	for _, hm := range hms {
		if hm.Allocated > 0 {
			nonZeroAllocated = true
		}
		if hm.NextGC > 0 {
			nonZeroNextGC = true
		}
	}

	if !nonZeroAllocated {
		t.Errorf("nonZeroAllocated=%v, want true", nonZeroAllocated)
	}
	if !nonZeroNextGC {

	case w > n:
		m = nat(nil).shr(m, w-n)
	}
	exp64 := int64(x.exp) - 1 // avoid wrap-around

	hm := m.utoa(16)
	if debugFloat && hm[0] != '1' {
		panic("incorrect mantissa: " + string(hm))
	}
	buf = append(buf, "0x1"...)
	if len(hm) > 1 {
		buf = append(buf, '.')
		buf = append(buf, hm[1:]...)
	}

	buf = append(buf, 'p')
	if exp64 >= 0 {
		buf = append(buf, '+')
	} else {

		return ErrSignatureDoesNotMatch
	}
	return ErrNone
}

func calculateSignatureV2(stringToSign string, secret string) string {
	hm := hmac.New(sha1.New, []byte(secret))
	hm.Write([]byte(stringToSign))
	return base64.StdEncoding.EncodeToString(hm.Sum(nil))
}

// Return signature-v2 for the presigned request.

        Node headerFiles = itemGroup('Filters').Filter.find({it.'@Include' == 'Header Files'}) as Node
        headerFiles.Extensions[0].text() == 'h;hpp;h++;hxx;hm;inl;inc;xsd'

        Node resourceFiles = itemGroup('Filters').Filter.find({it.'@Include' == 'Resource Files'}) as Node

        patterns.include("**/*.h");
        patterns.include("**/*.hpp");
        patterns.include("**/*.h++");
        patterns.include("**/*.hxx");
        patterns.include("**/*.hm");
        patterns.include("**/*.inl");
        patterns.include("**/*.inc");
        patterns.include("**/*.xsd");
        return getAllHeaderDirs().getAsFileTree().matching(patterns);
    }

        patterns.include("**/*.h");
        patterns.include("**/*.hpp");
        patterns.include("**/*.h++");
        patterns.include("**/*.hxx");
        patterns.include("**/*.hm");
        patterns.include("**/*.inl");
        patterns.include("**/*.inc");
        patterns.include("**/*.xsd");
        return publicHeadersWithConvention.getAsFileTree().matching(patterns);
    }