Context:  c.context,
	}
	text, err := difflib.GetUnifiedDiffString(diff)
	if err != nil {
		return err
	}
	if text != "" {
		fmt.Fprintln(c.w, "Listeners Don't Match")
		fmt.Fprintln(c.w, text)
	} else {
		fmt.Fprintln(c.w, "Listeners Match")
	}
	return nil

package cmd

import (
	"fmt"
	"net"
	"net/url"
	"strings"

	xnet "github.com/minio/pkg/v3/net"

	"github.com/minio/minio/internal/color"
	"github.com/minio/minio/internal/logger"
)

// generates format string depending on the string length and padding.
func getFormatStr(strLen int, padding int) string {
	formatStr := fmt.Sprintf("%ds", strLen+padding)
	return "%" + formatStr
}

	case float64:
		return fmt.Sprintf("%v", x), nil
	case int64:
		return fmt.Sprintf("%v", x), nil
	case string:
		return x, nil
	case []byte:
		return string(x), nil
	case bool:
		return fmt.Sprintf("%v", x), nil
	case nil:
		// FIXME: verify this case is correct
		return "NULL", nil
	}
	// This does not happen

	parsedPodAddr := net.ParseIP(pod.Status.PodIP)
	if parsedPodAddr == nil {
		return "", fmt.Errorf("failed to parse addr: %s", pod.Status.PodIP)
	}

	fs, err := procfs.NewFS("/host/proc")
	if err != nil {
		return "", fmt.Errorf("read procfs: %v", err)
	}
	procs, err := fs.AllProcs()
	if err != nil {
		return "", fmt.Errorf("read procs: %v", err)
	}
	oldest := uint64(math.MaxUint64)
	best := ""

		return filepath.Base(confFile), nil
	}

	return "", fmt.Errorf("no valid networks found in %s", confDir)
}

// insertCNIConfig will append newCNIConfig to existingCNIConfig
func insertCNIConfig(newCNIConfig, existingCNIConfig []byte) ([]byte, error) {
	var istioMap map[string]any
	err := json.Unmarshal(newCNIConfig, &istioMap)
	if err != nil {
		return nil, fmt.Errorf("error loading Istio CNI config (JSON error): %v", err)
	}

	if err := json.Unmarshal(b, meta); err != nil {
		return "", err
	}
	if meta.Version != formatMetaVersionV1 {
		return "", fmt.Errorf(`format.Version expected: %s, got: %s`, formatMetaVersionV1, meta.Version)
	}
	if meta.Format != formatBackendErasure && meta.Format != formatBackendErasureSingle {

				returnErr = nil
			} else {
				returnStr = ""
				returnErr = fmt.Errorf("can not retrieve inlineBytes from trustCA section")
			}
		} else {
			returnStr = ""
			returnErr = fmt.Errorf("can not retrieve trustedCa from secret ROOTCA")
		}
	} else {
		returnStr = ""
		returnErr = fmt.Errorf("can not find ROOTCA from secret config dump")
	}
	return returnStr, returnErr

			expectedOutput: nil,
			expectedError:  fmt.Errorf("invalid version XX, expected format like '1.0'"),
		},
		{
			revision:       "canary",
			version:        "2.0",
			expectedOutput: nil,
			expectedError:  fmt.Errorf("expected major version 1, got 2"),
		},
		{
			revision:       "canary",
			version:        "2.",
			expectedOutput: nil,
			expectedError:  fmt.Errorf("minor version is not a number: X"),
		},

	if entity == "" {
		return toAPIError(ctx, fmt.Errorf("error exporting %s with: %w", fname, err))
	}
	return toAPIError(ctx, fmt.Errorf("error exporting %s from %s with: %w", entity, fname, err))
}

// wraps import error for more context
func importError(ctx context.Context, err error, fname, entity string) APIError {
	if entity == "" {
		return toAPIError(ctx, fmt.Errorf("error importing %s with: %w", fname, err))
	}

# Usage

```go
package main

import (
	"fmt"

	"github.com/smallnest/ringbuffer"
)

func main() {
	rb := ringbuffer.New(1024)

	// write
	rb.Write([]byte("abcd"))
	fmt.Println(rb.Length())
	fmt.Println(rb.Free())

	// read
	buf := make([]byte, 4)
	rb.Read(buf)
	fmt.Println(string(buf))
}
```