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[Modify] Throw exception

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sta 2019-06-09 22:34:21 +09:00
parent 26dadfa133
commit ef2dec992c
1 changed files with 16 additions and 6 deletions
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22
websocket-sharp/Ext.cs
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@ -1584,15 +1584,25 @@ namespace WebSocketSharp
/// </typeparam> /// </typeparam>
public static T[] SubArray<T> (this T[] array, int startIndex, int length) public static T[] SubArray<T> (this T[] array, int startIndex, int length)
{ {
int len; if (array == null)
if (array == null || (len = array.Length) == 0) throw new ArgumentNullException ("array");
return new T[0];
if (startIndex < 0 || length <= 0 || startIndex + length > len) var len = array.Length;
return new T[0]; if (len == 0) {
if (startIndex != 0)
throw new ArgumentOutOfRangeException ("startIndex");
if (length != 0)
throw new ArgumentOutOfRangeException ("length");
if (startIndex == 0 && length == len)
return array; return array;
}
if (startIndex < 0 || startIndex > len - 1)
throw new ArgumentOutOfRangeException ("startIndex");
if (length < 0 || length > len - startIndex)
throw new ArgumentOutOfRangeException ("length");
var subArray = new T[length]; var subArray = new T[length];
Array.Copy (array, startIndex, subArray, 0, length); Array.Copy (array, startIndex, subArray, 0, length);