Rename goupnp2dcpgen to goupnpsrvgen.

v2alpha/cmd/goupnp2srvgen/zipread/zipread.go

@@ -0,0 +1,68 @@
+package zipread
+
+import (
+	"archive/zip"
+	"bytes"
+	"io"
+	"io/fs"
+	"os"
+)
+
+type SizedReaderAt struct {
+	R    io.ReaderAt
+	Size int64
+}
+
+func NewSizedReaderFromOsFile(f *os.File) (*SizedReaderAt, error) {
+	stat, err := f.Stat()
+	if err != nil {
+		return nil, err
+	}
+	return &SizedReaderAt{R: f, Size: stat.Size()}, nil
+}
+
+func NewSizedReaderFromReader(r io.Reader) (*SizedReaderAt, error) {
+	data, err := io.ReadAll(r)
+	if err != nil {
+		return nil, err
+	}
+	contents := bytes.NewReader(data)
+	return &SizedReaderAt{R: contents, Size: int64(len(data))}, nil
+}
+
+type ZipRead struct {
+	*zip.Reader
+}
+
+func New(r *SizedReaderAt) (*ZipRead, error) {
+	zr, err := zip.NewReader(r.R, r.Size)
+	if err != nil {
+		return nil, err
+	}
+	return &ZipRead{zr}, nil
+}
+
+func FromOsFile(f *os.File) (*ZipRead, error) {
+	r, err := NewSizedReaderFromOsFile(f)
+	if err != nil {
+		return nil, err
+	}
+	return New(r)
+}
+
+func FromFsFile(f fs.File) (*ZipRead, error) {
+	r, err := NewSizedReaderFromReader(f)
+	if err != nil {
+		return nil, err
+	}
+	return New(r)
+}
+
+func (zr *ZipRead) OpenZip(path string) (*ZipRead, error) {
+	f, err := zr.Reader.Open(path)
+	if err != nil {
+		return nil, err
+	}
+	defer f.Close()
+	return FromFsFile(f)
+}