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Golang library for reading RVZ disc images

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# Dolphin RVZ disc images

The [github.com/bodgit/rvz](https://github.com/bodgit/rvz) package reads the [RVZ disc image format](https://github.com/dolphin-emu/dolphin/blob/master/docs/WiaAndRvz.md) used by the [Dolphin emulator](https://dolphin-emu.org).

* Handles all supported compression methods; Zstandard is only marginally slower to read than no compression. Bzip2, LZMA, and LZMA2 are noticeably slower.

How to read a disc image:
```golang
package main

import (
	"io"
	"os"

"github.com/bodgit/rvz"
)

func main() {
	f, err := os.Open("image.rvz")
	if err != nil {
		panic(err)
	}
	defer f.Close()

r, err := rvz.NewReader(f)
	if err != nil {
		panic(err)
	}

w, err := os.Create("image.iso")
	if err != nil {
		panic(err)
	}
	defer w.Close()

if _, err = io.Copy(w, r); err != nil {
		panic(err)
	}
}
```

## rvz

The `rvz` utility currently allows you to decompress an `.rvz` file back to its original `.iso` format.

A quick demo:

rvz

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