}

// doesPolicySignatureMatch - Verify query headers with post policy
//   - http://docs.aws.amazon.com/AmazonS3/latest/API/sigv4-HTTPPOSTConstructPolicy.html
//
// returns ErrNone if the signature matches.
func doesPolicySignatureV4Match(formValues http.Header) (auth.Credentials, APIErrorCode) {
	// Server region.
	region := globalSite.Region

	// Parse credential tag.

	ifNoneMatchETagHeader := r.Header.Get(xhttp.AmzCopySourceIfNoneMatch)
	if ifNoneMatchETagHeader != "" {
		if isETagEqual(objInfo.ETag, ifNoneMatchETagHeader) {
			// If the object ETag matches with the specified ETag.
			writeHeaders()
			writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrPreconditionFailed), r.URL)
			return true
		}
	}
	// Object content should be written to http.ResponseWriter

	return wrapReader{
		Reader: wrapped,
	}
}

// A Reader wraps an io.Reader and computes the
// MD5 checksum of the read content as ETag.
//
// Optionally, a Reader can also verify that
// the computed ETag matches an expected value.
// Therefore, it compares both ETags once the
// underlying io.Reader returns io.EOF.
// If the computed ETag does not match the
// expected ETag then Read returns a VerifyError.
//

				topEntries[i] = entry
				current = entry
				agree++
				continue
			}
			// If exact match, we agree.
			if _, ok := current.matches(&entry, true); ok {
				topEntries[i] = entry
				agree++
				continue
			}
			// If only the name matches we didn't agree, but add it for resolution.
			if entry.name == current.name {
				topEntries[i] = entry
				continue
			}

			return
		}
	}

	if !globalIAMSys.Initialized() {
		writeSTSErrorResponse(ctx, w, ErrSTSIAMNotInitialized, errIAMNotInitialized)
		return
	}

	// Validate JWT; check clientID in claims matches the one associated with the roleArn
	if err := globalIAMSys.OpenIDConfig.Validate(r.Context(), roleArn, token, accessToken, r.Form.Get(stsDurationSeconds), claims); err != nil {
		switch err {
		case openid.ErrTokenExpired:

			ModTime:    expPart.ModTime,
			Index:      expPart.Index,
			Checksums:  nil, // Not transferred since we do not need it.
		}
	}

	if opts.WantChecksum != nil {
		err := opts.WantChecksum.Matches(checksumCombined)
		if err != nil {
			return oi, err
		}
	}

	// Hold namespace to complete the transaction
	lk := er.NewNSLock(bucket, object)

	}
	ri.mu.Unlock()
	return nil
}

// Note: to be used only with batch jobs that affect multiple versions through
// a single action. e.g batch-expire has an option to expire all versions of an
// object which matches the given filters.
func (ri *batchJobInfo) trackMultipleObjectVersions(bucket string, info ObjectInfo, success bool) {
	if success {
		ri.Objects += int64(info.NumVersions)
	} else {

	err := o.GetRawData(ctx, volume, file, rawDataFn)
	if err != nil {
		if errors.Is(err, errFileNotFound) {
			addErr("GetRawData: No files matched the given pattern")
			return
		}
		embedFileInZip(inspectZipW, "GetRawData-err.txt", []byte(err.Error()), 0o600)
		adminLogIf(ctx, err)
	}

	// save the format.json as part of inspect by default

		return false
	}

	for _, sprefix := range v.ExcludedPrefixes {
		// Note: all excluded prefix patterns end with `/` (See Validate)
		sprefix.Prefix += "*"

		if matched := wildcard.MatchSimple(sprefix.Prefix, prefix); matched {
			return false
		}
	}
	return true
}

// Suspended - returns true if versioning is suspended
func (v Versioning) Suspended() bool {
	return v.Status == Suspended
}

// jsonFloat converts a float to string similar to Go stdlib formats json floats.
func jsonFloat(f float64) string {
	var tmp [32]byte
	dst := tmp[:0]

	// Convert as if by ES6 number to string conversion.
	// This matches most other JSON generators.
	// See golang.org/issue/6384 and golang.org/issue/14135.
	// Like fmt %g, but the exponent cutoffs are different
	// and exponents themselves are not padded to two digits.
	abs := math.Abs(f)