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authorJiyoung Yun <jy910.yun@samsung.com>2016-12-27 16:46:08 +0900
committerJiyoung Yun <jy910.yun@samsung.com>2016-12-27 16:46:08 +0900
commitdb20f3f1bb8595633a7e16c8900fd401a453a6b5 (patch)
treee5435159cd1bf0519276363a6fe1663d1721bed3 /src/mscorlib/src/System/IO/StreamHelpers.CopyValidation.cs
parent4b4aad7217d3292650e77eec2cf4c198ea9c3b4b (diff)
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Imported Upstream version 1.0.0.9127upstream/1.0.0.9127
Diffstat (limited to 'src/mscorlib/src/System/IO/StreamHelpers.CopyValidation.cs')
-rw-r--r--src/mscorlib/src/System/IO/StreamHelpers.CopyValidation.cs46
1 files changed, 46 insertions, 0 deletions
diff --git a/src/mscorlib/src/System/IO/StreamHelpers.CopyValidation.cs b/src/mscorlib/src/System/IO/StreamHelpers.CopyValidation.cs
new file mode 100644
index 0000000000..8ff0e045ca
--- /dev/null
+++ b/src/mscorlib/src/System/IO/StreamHelpers.CopyValidation.cs
@@ -0,0 +1,46 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+namespace System.IO
+{
+ /// <summary>Provides methods to help in the implementation of Stream-derived types.</summary>
+ internal static partial class StreamHelpers
+ {
+ /// <summary>Validate the arguments to CopyTo, as would Stream.CopyTo.</summary>
+ public static void ValidateCopyToArgs(Stream source, Stream destination, int bufferSize)
+ {
+ if (destination == null)
+ {
+ throw new ArgumentNullException(nameof(destination));
+ }
+
+ if (bufferSize <= 0)
+ {
+ throw new ArgumentOutOfRangeException(nameof(bufferSize), bufferSize, Environment.GetResourceString("ArgumentOutOfRange_NeedPosNum"));
+ }
+
+ bool sourceCanRead = source.CanRead;
+ if (!sourceCanRead && !source.CanWrite)
+ {
+ throw new ObjectDisposedException(null, Environment.GetResourceString("ObjectDisposed_StreamClosed"));
+ }
+
+ bool destinationCanWrite = destination.CanWrite;
+ if (!destinationCanWrite && !destination.CanRead)
+ {
+ throw new ObjectDisposedException(nameof(destination), Environment.GetResourceString("ObjectDisposed_StreamClosed"));
+ }
+
+ if (!sourceCanRead)
+ {
+ throw new NotSupportedException(Environment.GetResourceString("NotSupported_UnreadableStream"));
+ }
+
+ if (!destinationCanWrite)
+ {
+ throw new NotSupportedException(Environment.GetResourceString("NotSupported_UnwritableStream"));
+ }
+ }
+ }
+}