func init() {
	// Inject metrics.
	ioutilx.OsOpenFile = OpenFile
	ioutilx.OpenFileDirectIO = OpenFileDirectIO
	ioutilx.OsOpen = Open
}

type osMetrics struct {
	// All fields must be accessed atomically and aligned.
	operations [osMetricLast]uint64
	latency    [osMetricLast]lockedLastMinuteLatency
}

// time an os action.
func (o *osMetrics) time(s osMetric) func() {
	startTime := time.Now()
	return func() {

		return closer.Close()
	}
	return nil
}

func (b *streamingBitrotReader) ReadAt(buf []byte, offset int64) (int, error) {
	var err error
	if offset%b.shardSize != 0 {
		// Offset should always be aligned to b.shardSize
		// Can never happen unless there are programmer bugs
		return 0, errUnexpected
	}
	if b.rc == nil {
		// For the first ReadAt() call we need to open the stream for reading.
		b.currOffset = offset

		}
		pre = cur
	}
	return true
}

// alignSparseEntries mutates src and returns dst where each fragment's
// starting offset is aligned up to the nearest block edge, and each
// ending offset is aligned down to the nearest block edge.
//
// Even though the Go tar Reader and the BSD tar utility can handle entries
// with arbitrary offsets and lengths, the GNU tar utility can only handle

)

//go:generate stringer -type=scannerMetric -trimprefix=scannerMetric $GOFILE

type scannerMetric uint8

type scannerMetrics struct {
	// All fields must be accessed atomically and aligned.
	operations [scannerMetricLast]uint64
	latency    [scannerMetricLastRealtime]lockedLastMinuteLatency

	// actions records actions performed.
	actions        [lifecycle.ActionCount]uint64

 * b0b1s7 is the section prefix. If a section is omitted, that means its ranges data exactly matches
 * that of the preceding section.
 *
 * b2b3s2 is the offset into the ranges data. It is shifted by 2 because ranges are 4-byte aligned.
 *
 * Mappings Data (4,719 bytes)
 * ===========================
 *
 * This is UTF-8 character data. It is indexed into by b2b3 in the ranges dataset.
 *
 * Mappings may overlap.
 *
 * ASCII-Only

<p>
The <code>PCALIGN</code> pseudo-instruction is used to indicate that the next instruction should be aligned
to a specified boundary by padding with no-op instructions.
</p>

<p>
It is currently supported on arm64, amd64, ppc64, loong64 and riscv64.

For example, the start of the <code>MOVD</code> instruction below is aligned to 32 bytes:
<pre>
PCALIGN $32
MOVD $2, R0
</pre>
</p>

	if len(sparseMap) > 0 {
		paxHdrs[paxGNUSparseMap] = strings.Join(sparseMap, ",")
	}
	return paxHdrs, nil
}

// readHeader reads the next block header and assumes that the underlying reader
// is already aligned to a block boundary. It returns the raw block of the
// header in case further processing is required.
//
// The err will be set to io.EOF only when one of the following occurs:
//   - Exactly 0 bytes are read and EOF is hit.

	getMD5 := getMD5Hash(getContent)

	// Compare putContent and getContent.
	c.Assert(putMD5, getMD5)
}

// TestGetPartialObjectMisAligned - tests get object partially miss-aligned.
// create a large buffer of miss-aligned data and upload it.
// then make partial range requests to while fetching it back and assert the response content.
func (s *TestSuiteCommon) TestGetPartialObjectMisAligned(c *check) {

        }
    }

    @Test
    void testInterpolationWithBasedirAlignedDirectories() throws Exception {
        PomTestWrapper pom = buildPom("basedir-aligned-interpolation");
        assertEquals(
                new File(pom.getBasedir(), "src/main/java"),
                new File(pom.getValue("properties/buildMainSrc").toString()));
        assertEquals(

	MOVD R3, 257(R17)                          // 3b060491630300f9
	MOVD R3, 391(R17)                          // 3b1e0691630300f9
	MOVD R3, 4095(R17)                         // 3bfe3f91630300f9

// large aligned offset, use two instructions(add+ldr/str).
	MOVB	R1, 0x1001(R2) 		// MOVB		R1, 4097(R2)		// 5b04409161070039
	MOVB	R1, 0xffffff(R2)	// MOVB		R1, 16777215(R2)	// 5bfc7f9161ff3f39