From 27401b6ea459921a6152ab1744da1618358465f4 Mon Sep 17 00:00:00 2001
From: Luke Shumaker <lukeshu@lukeshu.com>
Date: Sun, 10 Jul 2022 13:18:30 -0600
Subject: Rename the module, mv pkg lib

---
 lib/binstruct/marshal.go | 42 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)
 create mode 100644 lib/binstruct/marshal.go

(limited to 'lib/binstruct/marshal.go')

diff --git a/lib/binstruct/marshal.go b/lib/binstruct/marshal.go
new file mode 100644
index 0000000..684d2f3
--- /dev/null
+++ b/lib/binstruct/marshal.go
@@ -0,0 +1,42 @@
+package binstruct
+
+import (
+	"encoding"
+	"fmt"
+	"reflect"
+)
+
+type Marshaler = encoding.BinaryMarshaler
+
+func Marshal(obj any) ([]byte, error) {
+	if mar, ok := obj.(Marshaler); ok {
+		return mar.MarshalBinary()
+	}
+	return MarshalWithoutInterface(obj)
+}
+
+func MarshalWithoutInterface(obj any) ([]byte, error) {
+	val := reflect.ValueOf(obj)
+	switch val.Kind() {
+	case reflect.Uint8, reflect.Int8, reflect.Uint16, reflect.Int16, reflect.Uint32, reflect.Int32, reflect.Uint64, reflect.Int64:
+		typ := intKind2Type[val.Kind()]
+		return val.Convert(typ).Interface().(Marshaler).MarshalBinary()
+	case reflect.Ptr:
+		return Marshal(val.Elem().Interface())
+	case reflect.Array:
+		var ret []byte
+		for i := 0; i < val.Len(); i++ {
+			bs, err := Marshal(val.Index(i).Interface())
+			ret = append(ret, bs...)
+			if err != nil {
+				return ret, err
+			}
+		}
+		return ret, nil
+	case reflect.Struct:
+		return getStructHandler(val.Type()).Marshal(val)
+	default:
+		panic(fmt.Errorf("type=%v does not implement binfmt.Marshaler and kind=%v is not a supported statically-sized kind",
+			val.Type(), val.Kind()))
+	}
+}
-- 
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