public errors

internal/aes7z/reader.go

@@ -11,11 +11,11 @@ import (
 )
 
 var (
-	errAlreadyClosed          = errors.New("aes7z: already closed")
-	errNeedOneReader          = errors.New("aes7z: need exactly one reader")
-	errInsufficientProperties = errors.New("aes7z: not enough properties")
-	errNoPasswordSet          = errors.New("aes7z: no password set")
-	errUnsupportedMethod      = errors.New("aes7z: unsupported compression method")
+	ErrAlreadyClosed          = errors.New("aes7z: already closed")
+	ErrNeedOneReader          = errors.New("aes7z: need exactly one reader")
+	ErrInsufficientProperties = errors.New("aes7z: not enough properties")
+	ErrNoPasswordSet          = errors.New("aes7z: no password set")
+	ErrUnsupportedMethod      = errors.New("aes7z: unsupported compression method")
 )
 
 type readCloser struct {
@@ -28,7 +28,7 @@ type readCloser struct {
 
 func (rc *readCloser) Close() error {
 	if rc.rc == nil {
-		return errAlreadyClosed
+		return ErrAlreadyClosed
 	}
 
 	if err := rc.rc.Close(); err != nil {
@@ -58,11 +58,11 @@ func (rc *readCloser) Password(p string) error {
 
 func (rc *readCloser) Read(p []byte) (int, error) {
 	if rc.rc == nil {
-		return 0, errAlreadyClosed
+		return 0, ErrAlreadyClosed
 	}
 
 	if rc.cbc == nil {
-		return 0, errNoPasswordSet
+		return 0, ErrNoPasswordSet
 	}
 
 	var block [aes.BlockSize]byte
@@ -94,16 +94,16 @@ func (rc *readCloser) Read(p []byte) (int, error) {
 // cipher is correctly initialised.
 func NewReader(p []byte, _ uint64, readers []io.ReadCloser) (io.ReadCloser, error) {
 	if len(readers) != 1 {
-		return nil, errNeedOneReader
+		return nil, ErrNeedOneReader
 	}
 
 	// Need at least two bytes initially
 	if len(p) < 2 {
-		return nil, errInsufficientProperties
+		return nil, ErrInsufficientProperties
 	}
 
 	if p[0]&0xc0 == 0 {
-		return nil, errUnsupportedMethod
+		return nil, ErrUnsupportedMethod
 	}
 
 	rc := new(readCloser)
@@ -112,7 +112,7 @@ func NewReader(p []byte, _ uint64, readers []io.ReadCloser) (io.ReadCloser, erro
 	iv := p[0]>>6&1 + p[1]&0x0f
 
 	if len(p) != int(2+salt+iv) {
-		return nil, errInsufficientProperties
+		return nil, ErrInsufficientProperties
 	}
 
 	rc.salt = p[2 : 2+salt]

internal/bcj2/reader.go

@@ -37,8 +37,8 @@ const (
 )
 
 var (
-	errAlreadyClosed   = errors.New("bcj2: already closed")
-	errNeedFourReaders = errors.New("bcj2: need exactly four readers")
+	ErrAlreadyClosed   = errors.New("bcj2: already closed")
+	ErrNeedFourReaders = errors.New("bcj2: need exactly four readers")
 )
 
 func isJcc(b0, b1 byte) bool {
@@ -63,7 +63,7 @@ func index(b0, b1 byte) int {
 // NewReader returns a new BCJ2 io.ReadCloser.
 func NewReader(_ []byte, _ uint64, readers []io.ReadCloser) (io.ReadCloser, error) {
 	if len(readers) != 4 {
-		return nil, errNeedFourReaders
+		return nil, ErrNeedFourReaders
 	}
 
 	rc := &readCloser{
@@ -98,7 +98,7 @@ func NewReader(_ []byte, _ uint64, readers []io.ReadCloser) (io.ReadCloser, erro
 
 func (rc *readCloser) Close() error {
 	if rc.main == nil || rc.call == nil || rc.jump == nil || rc.rd == nil {
-		return errAlreadyClosed
+		return ErrAlreadyClosed
 	}
 
 	if err := errors.Join(rc.main.Close(), rc.call.Close(), rc.jump.Close(), rc.rd.Close()); err != nil {
@@ -112,7 +112,7 @@ func (rc *readCloser) Close() error {
 
 func (rc *readCloser) Read(p []byte) (int, error) {
 	if rc.main == nil || rc.call == nil || rc.jump == nil || rc.rd == nil {
-		return 0, errAlreadyClosed
+		return 0, ErrAlreadyClosed
 	}
 
 	if err := rc.read(); err != nil && !errors.Is(err, io.EOF) {

internal/bra/reader.go

@@ -15,13 +15,13 @@ type readCloser struct {
 }
 
 var (
-	errAlreadyClosed = errors.New("bra: already closed")
-	errNeedOneReader = errors.New("bra: need exactly one reader")
+	ErrAlreadyClosed = errors.New("bra: already closed")
+	ErrNeedOneReader = errors.New("bra: need exactly one reader")
 )
 
 func (rc *readCloser) Close() error {
 	if rc.rc == nil {
-		return errAlreadyClosed
+		return ErrAlreadyClosed
 	}
 
 	if err := rc.rc.Close(); err != nil {
@@ -35,7 +35,7 @@ func (rc *readCloser) Close() error {
 
 func (rc *readCloser) Read(p []byte) (int, error) {
 	if rc.rc == nil {
-		return 0, errAlreadyClosed
+		return 0, ErrAlreadyClosed
 	}
 
 	if _, err := io.CopyN(&rc.buf, rc.rc, int64(max(len(p), rc.conv.Size())-rc.buf.Len())); err != nil {
@@ -62,7 +62,7 @@ func (rc *readCloser) Read(p []byte) (int, error) {
 
 func newReader(readers []io.ReadCloser, conv converter) (io.ReadCloser, error) {
 	if len(readers) != 1 {
-		return nil, errNeedOneReader
+		return nil, ErrNeedOneReader
 	}
 
 	return &readCloser{

internal/brotli/reader.go

@@ -28,8 +28,8 @@ var (
 	//nolint:gochecknoglobals
 	brotliReaderPool sync.Pool
 
-	errAlreadyClosed = errors.New("brotli: already closed")
-	errNeedOneReader = errors.New("brotli: need exactly one reader")
+	ErrAlreadyClosed = errors.New("brotli: already closed")
+	ErrNeedOneReader = errors.New("brotli: need exactly one reader")
 )
 
 // This isn't part of the Brotli format but is prepended by the 7-zip implementation.
@@ -43,7 +43,7 @@ type headerFrame struct {
 
 func (rc *readCloser) Close() error {
 	if rc.c == nil || rc.r == nil {
-		return errAlreadyClosed
+		return ErrAlreadyClosed
 	}
 
 	if err := rc.c.Close(); err != nil {
@@ -58,7 +58,7 @@ func (rc *readCloser) Close() error {
 
 func (rc *readCloser) Read(p []byte) (int, error) {
 	if rc.r == nil {
-		return 0, errAlreadyClosed
+		return 0, ErrAlreadyClosed
 	}
 
 	n, err := rc.r.Read(p)
@@ -72,7 +72,7 @@ func (rc *readCloser) Read(p []byte) (int, error) {
 // NewReader returns a new Brotli io.ReadCloser.
 func NewReader(_ []byte, _ uint64, readers []io.ReadCloser) (io.ReadCloser, error) {
 	if len(readers) != 1 {
-		return nil, errNeedOneReader
+		return nil, ErrNeedOneReader
 	}
 
 	hr, b := new(headerFrame), new(bytes.Buffer)

internal/bzip2/reader.go

@@ -14,13 +14,13 @@ type readCloser struct {
 }
 
 var (
-	errAlreadyClosed = errors.New("bzip2: already closed")
-	errNeedOneReader = errors.New("bzip2: need exactly one reader")
+	ErrAlreadyClosed = errors.New("bzip2: already closed")
+	ErrNeedOneReader = errors.New("bzip2: need exactly one reader")
 )
 
 func (rc *readCloser) Close() error {
 	if rc.c == nil || rc.r == nil {
-		return errAlreadyClosed
+		return ErrAlreadyClosed
 	}
 
 	if err := rc.c.Close(); err != nil {
@@ -34,7 +34,7 @@ func (rc *readCloser) Close() error {
 
 func (rc *readCloser) Read(p []byte) (int, error) {
 	if rc.r == nil {
-		return 0, errAlreadyClosed
+		return 0, ErrAlreadyClosed
 	}
 
 	n, err := rc.r.Read(p)
@@ -48,7 +48,7 @@ func (rc *readCloser) Read(p []byte) (int, error) {
 // NewReader returns a new bzip2 io.ReadCloser.
 func NewReader(_ []byte, _ uint64, readers []io.ReadCloser) (io.ReadCloser, error) {
 	if len(readers) != 1 {
-		return nil, errNeedOneReader
+		return nil, ErrNeedOneReader
 	}
 
 	return &readCloser{

internal/deflate/reader.go

@@ -20,13 +20,13 @@ var (
 	//nolint:gochecknoglobals
 	flateReaderPool sync.Pool
 
-	errAlreadyClosed = errors.New("deflate: already closed")
-	errNeedOneReader = errors.New("deflate: need exactly one reader")
+	ErrAlreadyClosed = errors.New("deflate: already closed")
+	ErrNeedOneReader = errors.New("deflate: need exactly one reader")
 )
 
 func (rc *readCloser) Close() error {
 	if rc.c == nil || rc.fr == nil {
-		return errAlreadyClosed
+		return ErrAlreadyClosed
 	}
 
 	if err := errors.Join(rc.fr.Close(), rc.c.Close()); err != nil {
@@ -41,7 +41,7 @@ func (rc *readCloser) Close() error {
 
 func (rc *readCloser) Read(p []byte) (int, error) {
 	if rc.c == nil || rc.fr == nil {
-		return 0, errAlreadyClosed
+		return 0, ErrAlreadyClosed
 	}
 
 	n, err := rc.fr.Read(p)
@@ -55,7 +55,7 @@ func (rc *readCloser) Read(p []byte) (int, error) {
 // NewReader returns a new DEFLATE io.ReadCloser.
 func NewReader(_ []byte, _ uint64, readers []io.ReadCloser) (io.ReadCloser, error) {
 	if len(readers) != 1 {
-		return nil, errNeedOneReader
+		return nil, ErrNeedOneReader
 	}
 
 	fr, ok := flateReaderPool.Get().(io.ReadCloser)

internal/delta/reader.go

@@ -18,14 +18,14 @@ const (
 )
 
 var (
-	errAlreadyClosed          = errors.New("delta: already closed")
-	errNeedOneReader          = errors.New("delta: need exactly one reader")
-	errInsufficientProperties = errors.New("delta: not enough properties")
+	ErrAlreadyClosed          = errors.New("delta: already closed")
+	ErrNeedOneReader          = errors.New("delta: need exactly one reader")
+	ErrInsufficientProperties = errors.New("delta: not enough properties")
 )
 
 func (rc *readCloser) Close() error {
 	if rc.rc == nil {
-		return errAlreadyClosed
+		return ErrAlreadyClosed
 	}
 
 	if err := rc.rc.Close(); err != nil {
@@ -39,7 +39,7 @@ func (rc *readCloser) Close() error {
 
 func (rc *readCloser) Read(p []byte) (int, error) {
 	if rc.rc == nil {
-		return 0, errAlreadyClosed
+		return 0, ErrAlreadyClosed
 	}
 
 	n, err := rc.rc.Read(p)
@@ -75,11 +75,11 @@ func (rc *readCloser) Read(p []byte) (int, error) {
 // NewReader returns a new Delta io.ReadCloser.
 func NewReader(p []byte, _ uint64, readers []io.ReadCloser) (io.ReadCloser, error) {
 	if len(readers) != 1 {
-		return nil, errNeedOneReader
+		return nil, ErrNeedOneReader
 	}
 
 	if len(p) != 1 {
-		return nil, errInsufficientProperties
+		return nil, ErrInsufficientProperties
 	}
 
 	return &readCloser{

internal/lz4/reader.go

@@ -19,13 +19,13 @@ var (
 	//nolint:gochecknoglobals
 	lz4ReaderPool sync.Pool
 
-	errAlreadyClosed = errors.New("lz4: already closed")
-	errNeedOneReader = errors.New("lz4: need exactly one reader")
+	ErrAlreadyClosed = errors.New("lz4: already closed")
+	ErrNeedOneReader = errors.New("lz4: need exactly one reader")
 )
 
 func (rc *readCloser) Close() error {
 	if rc.c == nil || rc.r == nil {
-		return errAlreadyClosed
+		return ErrAlreadyClosed
 	}
 
 	if err := rc.c.Close(); err != nil {
@@ -40,7 +40,7 @@ func (rc *readCloser) Close() error {
 
 func (rc *readCloser) Read(p []byte) (int, error) {
 	if rc.r == nil {
-		return 0, errAlreadyClosed
+		return 0, ErrAlreadyClosed
 	}
 
 	n, err := rc.r.Read(p)
@@ -54,7 +54,7 @@ func (rc *readCloser) Read(p []byte) (int, error) {
 // NewReader returns a new LZ4 io.ReadCloser.
 func NewReader(_ []byte, _ uint64, readers []io.ReadCloser) (io.ReadCloser, error) {
 	if len(readers) != 1 {
-		return nil, errNeedOneReader
+		return nil, ErrNeedOneReader
 	}
 
 	r, ok := lz4ReaderPool.Get().(*lz4.Reader)

internal/lzma/reader.go

@@ -17,13 +17,13 @@ type readCloser struct {
 }
 
 var (
-	errAlreadyClosed = errors.New("lzma: already closed")
-	errNeedOneReader = errors.New("lzma: need exactly one reader")
+	ErrAlreadyClosed = errors.New("lzma: already closed")
+	ErrNeedOneReader = errors.New("lzma: need exactly one reader")
 )
 
 func (rc *readCloser) Close() error {
 	if rc.c == nil || rc.r == nil {
-		return errAlreadyClosed
+		return ErrAlreadyClosed
 	}
 
 	if err := rc.c.Close(); err != nil {
@@ -37,7 +37,7 @@ func (rc *readCloser) Close() error {
 
 func (rc *readCloser) Read(p []byte) (int, error) {
 	if rc.r == nil {
-		return 0, errAlreadyClosed
+		return 0, ErrAlreadyClosed
 	}
 
 	n, err := rc.r.Read(p)
@@ -51,7 +51,7 @@ func (rc *readCloser) Read(p []byte) (int, error) {
 // NewReader returns a new LZMA io.ReadCloser.
 func NewReader(p []byte, s uint64, readers []io.ReadCloser) (io.ReadCloser, error) {
 	if len(readers) != 1 {
-		return nil, errNeedOneReader
+		return nil, ErrNeedOneReader
 	}
 
 	h := bytes.NewBuffer(p)