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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsIInputStream.idl"
+
+%{C++
+#include "mozilla/MemoryReporting.h"
+%}
+
+native MallocSizeOf(mozilla::MallocSizeOf);
+
+/**
+ * nsIStringInputStream
+ *
+ * Provides scriptable and specialized C++-only methods for initializing a
+ * nsIInputStream implementation with a simple character array.
+ */
+[scriptable, builtinclass, uuid(450cd2d4-f0fd-424d-b365-b1251f80fd53)]
+interface nsIStringInputStream : nsIInputStream
+{
+ /**
+ * SetData - assign data to the input stream (copied on assignment).
+ *
+ * @param data - stream data
+ * @param dataLen - stream data length (-1 if length should be computed)
+ *
+ * NOTE: C++ code should consider using AdoptData or ShareData to avoid
+ * making an extra copy of the stream data.
+ *
+ * NOTE: For JS callers, the given data must not contain null characters
+ * (other than a null terminator) because a null character in the middle of
+ * the data string will be seen as a terminator when the data is converted
+ * from a JS string to a C++ character array.
+ */
+ void setData(in string data, in long dataLen);
+
+ /**
+ * NOTE: the following methods are designed to give C++ code added control
+ * over the ownership and lifetime of the stream data. Use with care :-)
+ */
+
+ /**
+ * AdoptData - assign data to the input stream. the input stream takes
+ * ownership of the given data buffer and will free it when
+ * the input stream is destroyed.
+ *
+ * @param data - stream data
+ * @param dataLen - stream data length (-1 if length should be computed)
+ */
+ [noscript] void adoptData(in charPtr data, in long dataLen);
+
+ /**
+ * ShareData - assign data to the input stream. the input stream references
+ * the given data buffer until the input stream is destroyed. the given
+ * data buffer must outlive the input stream.
+ *
+ * @param data - stream data
+ * @param dataLen - stream data length (-1 if length should be computed)
+ */
+ [noscript] void shareData(in string data, in long dataLen);
+
+ [noscript, notxpcom]
+ size_t SizeOfIncludingThis(in MallocSizeOf aMallocSizeOf);
+};