init: dec-music 项目初始化

mmkv/internal/protobuffer.go

@@ -0,0 +1,41 @@
+package internal
+
+// ProtoBuffer decodes a subset of the protobuf wire format for MMKV payloads.
+
+type ProtoBuffer struct {
+	buf []byte
+	idx int
+}
+
+// NewProtoBuffer returns a buffer whose unread portion is buf.
+func NewProtoBuffer(buf []byte) *ProtoBuffer {
+	return &ProtoBuffer{buf: buf}
+}
+
+// DecodeStringBytes consumes a length-prefixed string.
+func (b *ProtoBuffer) DecodeStringBytes() (string, error) {
+	v, n := ConsumeString(b.buf[b.idx:])
+	if n < 0 {
+		return "", parseError(n)
+	}
+	b.idx += n
+	return v, nil
+}
+
+// DecodeRawBytes consumes a length-prefixed bytes field.
+func (b *ProtoBuffer) DecodeRawBytes(alloc bool) ([]byte, error) {
+	v, n := ConsumeBytes(b.buf[b.idx:])
+	if n < 0 {
+		return nil, parseError(n)
+	}
+	b.idx += n
+	if alloc {
+		v = append([]byte(nil), v...)
+	}
+	return v, nil
+}
+
+// Unread returns the unread portion of the buffer.
+func (b *ProtoBuffer) Unread() []byte {
+	return b.buf[b.idx:]
+}