https://github.com/hslam/copyfilerange

Package copyfilerange wraps the copy_file_range system call.
https://github.com/hslam/copyfilerange

copy-file-range copyfilerange go golang

Last synced: about 1 year ago
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Package copyfilerange wraps the copy_file_range system call.

• Host: GitHub
• URL: https://github.com/hslam/copyfilerange
• Owner: hslam
• License: mit
• Created: 2023-11-14T19:30:54.000Z (over 2 years ago)
• Default Branch: master
• Last Pushed: 2023-11-14T20:31:40.000Z (over 2 years ago)
• Last Synced: 2023-11-16T10:01:21.229Z (over 2 years ago)
• Topics: copy-file-range, copyfilerange, go, golang
• Language: Go
• Homepage:
• Size: 8.79 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# copyfilerange

[![PkgGoDev](https://pkg.go.dev/badge/github.com/hslam/copyfilerange)](https://pkg.go.dev/github.com/hslam/copyfilerange)

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[![codecov](https://codecov.io/gh/hslam/copyfilerange/branch/master/graph/badge.svg)](https://codecov.io/gh/hslam/copyfilerange)

[![Go Report Card](https://goreportcard.com/badge/github.com/hslam/copyfilerange)](https://goreportcard.com/report/github.com/hslam/copyfilerange)

[![LICENSE](https://img.shields.io/github/license/hslam/copyfilerange.svg?style=flat-square)](https://github.com/hslam/copyfilerange/blob/master/LICENSE)

Package copyfilerange wraps the copy_file_range system call.

## Get started

### Install

```

go get github.com/hslam/copyfilerange

```

### Import

```

import "github.com/hslam/copyfilerange"

```

### Usage

#### Example

```go

package main

import (

	"fmt"

	"github.com/hslam/copyfilerange"

	"os"

)

func main() {

	srcName, dstName := "srcFile", "dstFile"

	srcFile, _ := os.Create(srcName)

	defer os.Remove(srcName)

	defer srcFile.Close()

	dstFile, _ := os.Create(dstName)

	defer os.Remove(dstName)

	defer dstFile.Close()

	content := []byte("Hello world")

	srcOffset, dstOffset := int64(64), int64(32)

	srcFile.Truncate(srcOffset)

	srcFile.WriteAt(content, srcOffset)

	dstFile.Truncate(dstOffset + int64(len(content)))

	roff, woff := srcOffset, dstOffset

	copyfilerange.CopyFileRange(int(srcFile.Fd()), &roff, int(dstFile.Fd()), &woff, len(content), 0)

	buf := make([]byte, len(content))

	dstFile.ReadAt(buf, dstOffset)

	fmt.Println(string(buf))

}

```

### Output

```

Hello world

```

### License

This package is licensed under a MIT license (Copyright (c) 2023 Meng Huang)

### Author

copyfilerange was written by Meng Huang.