出荷時の回答はこちらです。最初に見逃した重要な部分は次のとおりです。
- IEnumerable (foreach) 内の要素に書き込むことはできません。
- 配列へのキャストを忘れて、[] 演算子を使用します (get/set 値を使用するだけです)。
- 予期しない場所でボクシングが必要になることがあります
このシリアライザーは FIXED SIZE クラスで機能することに注意してください (属性クラスは文字列の長さを指定するために使用されます。デシリアライゼーションのターゲットには、すべてのコンポーネントのデフォルトの初期化が必要で、null は必要ありません)。これは、C# 組み込みシリアライザーが冗長すぎて、スペースが限られた組み込みデバイスのフラッシュに値を格納できない場合に使用されます。多次元配列はサポートしていません (読者の演習)。
誰かがこれを役に立てば幸いです。提案に感謝します。
敬具、デイブ
private static void navelGaze(string name, int level, ref object val, int storageSize)
{
Debug.Assert(val != null); // can happen with an unitialized string (please init to "")
Type t = val.GetType();
StringBuilder diagString = new StringBuilder(100);
diagString.Append(name); diagString.Append(": ");
if (t.IsArray)
{
Type t_item = t.GetElementType();
Array ar = val as Array;
int len = ar.Length;
diagString.Append("Type="); diagString.Append(t_item.Name);
diagString.Append("["); diagString.Append(len); diagString.Append("]");
if (t_item.BaseType.Name == "ValueType")
{
// array of primitive types like Bool or Int32...
diagString.Append(", value=[");
// Because C# does not permit modification of the iteration object
// in "foreach", nor subscript operations on an array of primitive values,
// use "GetValue/Setvalue" and a regular index iteration.
for(int idx=0; idx<len; idx++) {
object arrayElementBoxObj = ar.GetValue(idx);
Munger(ref arrayElementBoxObj, 0);
diagString.Append(arrayElementBoxObj.ToString());
diagString.Append(", ");
if (currentOperation == SerializerOperation_T.Deserialize)
ar.SetValue(arrayElementBoxObj, idx);
}
diagString.Append("]");
WriteDiagnostic(level, diagString.ToString());
return;
}
else
{
// This is an array of a complex type; recurse for each element in the array...
WriteDiagnostic(level, diagString.ToString());
// The following cast operation is required to subscript 'ar'...
// Note an array of a primitive type like 'int' cannot be cast to an array of objects.
object[] vResObjArray = (object[])ar;
for(int i=0; i<len; i++) {
object boxObj = vResObjArray[i];
navelGaze(name + "[" + i + "]", level + 1, ref boxObj, 0);
if (currentOperation == SerializerOperation_T.Deserialize)
{
// Setting vResObjArray[x] DOES set the original object passed into
// this function, as required for deserialization.
vResObjArray[i] = boxObj;
}
}
return;
}
}
else if (t.Name == "String")
{
// 'String' is actually a class, but normal class handling below blows up...
diagString.Append("Type="); diagString.Append(t.Name);
diagString.Append(", value=");
Munger(ref val, storageSize);
diagString.Append(val.ToString());
}
else if (t.IsClass)
{
// Decompose class and recurse over members
WriteDiagnostic(level, diagString + "Class " + t.Name);
// Note that custom attributes are associated with the class's fields and properties,
// NOT the type of the value of the fields/properties, so this must be checked here
// prior recursion to process the values...
// GetFields does not get the PROPERTIES of the object, that's very annoying...
FieldInfo[] fi = val.GetType().GetFields();
foreach (FieldInfo f in fi)
{
if (f.IsStatic) continue; // ignore class constants
// Skip this if the FIELD is marked [HSB_GUI_SerializeSuppress]
HSB_GUI_SerializeSuppressAttribute[] GUI_field_suppressSerializationAtt =
(HSB_GUI_SerializeSuppressAttribute[])
f.GetCustomAttributes(typeof(HSB_GUI_SerializeSuppressAttribute), true);
if (GUI_field_suppressSerializationAtt.Length > 0)
continue; // this field is marked with "suppress serialization to GUI save are"
// Get optional size specifier (required for strings)
int nextLevelStorageSize = 0;
HSB_GUI_SerializableAttribute[] HSB_GUI_SerializableAtt =
(HSB_GUI_SerializableAttribute[])
f.GetCustomAttributes(typeof(HSB_GUI_SerializableAttribute), true);
if (HSB_GUI_SerializableAtt.Length > 0)
nextLevelStorageSize = HSB_GUI_SerializableAtt[0].StorageLength;
// box, and gaze into this field...
object boxObj = f.GetValue(val);
// could replace null with default object constructed here
navelGaze(f.Name, level + 1, ref boxObj, nextLevelStorageSize);
if (currentOperation == SerializerOperation_T.Deserialize)
f.SetValue(val, boxObj);
}
// Now iterate over the PROPERTIES
foreach (PropertyInfo prop in /*typeof(T)*/ val.GetType().GetProperties())
{
// Skip this if the PROPERTY is marked [HSB_GUI_SerializeSuppress]
HSB_GUI_SerializeSuppressAttribute[] GUI_prop_suppressSerializationAtt =
(HSB_GUI_SerializeSuppressAttribute[])
prop.GetCustomAttributes(typeof(HSB_GUI_SerializeSuppressAttribute), true);
if (GUI_prop_suppressSerializationAtt.Length > 0)
continue; // this property is marked with "suppress serialization to GUI save are"
// not relevant; does not occur: if (!type.IsSerializable) continue;
// Get optional size specifier (required for strings)
int nextLevelStorageSize = 0;
HSB_GUI_SerializableAttribute[] HSB_GUI_SerializableAtt =
(HSB_GUI_SerializableAttribute[])
prop.GetCustomAttributes(typeof(HSB_GUI_SerializableAttribute), true);
if (HSB_GUI_SerializableAtt.Length > 0)
nextLevelStorageSize = HSB_GUI_SerializableAtt[0].StorageLength;
// box, and gaze into this field...
object boxObj = prop.GetValue(val, null);
// could replace null with default object constructed here
navelGaze("Property " + prop.Name, level + 1, ref boxObj, nextLevelStorageSize);
if (currentOperation == SerializerOperation_T.Deserialize)
prop.SetValue(val, boxObj, null);
}
return;
}
else if (t.IsEnum)
{
Munger(ref val, 0);
diagString.Append("Enum ("); diagString.Append(t.Name); diagString.Append("), value=");
diagString.Append(val.ToString()); diagString.Append(", raw value="); diagString.Append((int)val);
}
else
{
Munger(ref val, 0);
diagString.Append("Type="); diagString.Append(t.Name);
diagString.Append(", value="); diagString.Append(val.ToString());
}
WriteDiagnostic(level,diagString.ToString());
}
public static HSB_Settings_Class DeserializeResult(byte[] datastream)
{
Debug.Assert(datastream.Length == 0x0600);
idx = 0;
buf = datastream;
currentOperation = SerializerOperation_T.Deserialize;
HSB_Settings_Class new_HSB_settings = new HSB_Settings_Class();
object boxObj = new_HSB_settings;
navelGaze("DeserializeResult", 0, ref boxObj, 0);
new_HSB_settings = (HSB_Settings_Class)boxObj;
Console.WriteLine("==== Deserialization used a total of " + idx.ToString() + " bytes (out of 1536 available) ====");
return new_HSB_settings;
}
public static byte[] SerializeHSBsettings(ref HSB_Settings_Class hsbset)
{
idx = 0;
currentOperation = SerializerOperation_T.Serialize;
object boxObj = hsbset;
navelGaze("SerializeHSB", 0, ref boxObj, 0);
Console.WriteLine("==== Serialization used a total of "+idx.ToString() + " bytes (out of 1536 available) ====");
return buf;
}