summaryrefslogtreecommitdiffstats
path: root/xpcom/io/nsIBinaryInputStream.idl
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--xpcom/io/nsIBinaryInputStream.idl118
1 files changed, 118 insertions, 0 deletions
diff --git a/xpcom/io/nsIBinaryInputStream.idl b/xpcom/io/nsIBinaryInputStream.idl
new file mode 100644
index 0000000000..698dbae4f8
--- /dev/null
+++ b/xpcom/io/nsIBinaryInputStream.idl
@@ -0,0 +1,118 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ * 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"
+
+/**
+ * This interface allows consumption of primitive data types from a "binary
+ * stream" containing untagged, big-endian binary data, i.e. as produced by an
+ * implementation of nsIBinaryOutputStream. This might be used, for example,
+ * to implement network protocols or to read from architecture-neutral disk
+ * files, i.e. ones that can be read and written by both big-endian and
+ * little-endian platforms.
+ *
+ * @See nsIBinaryOutputStream
+ */
+
+[scriptable, builtinclass, uuid(899b826b-2eb3-469c-8b31-4c29f5d341a6)]
+interface nsIBinaryInputStream : nsIInputStream {
+ void setInputStream(in nsIInputStream aInputStream);
+
+ /**
+ * Read 8-bits from the stream.
+ *
+ * @return that byte to be treated as a boolean.
+ */
+ boolean readBoolean();
+
+ uint8_t read8();
+ uint16_t read16();
+ uint32_t read32();
+ uint64_t read64();
+
+ float readFloat();
+ double readDouble();
+
+ /**
+ * Read an 8-bit pascal style string from the stream.
+ * 32-bit length field, followed by length 8-bit chars.
+ */
+ ACString readCString();
+
+ /**
+ * Read an 16-bit pascal style string from the stream.
+ * 32-bit length field, followed by length PRUnichars.
+ */
+ AString readString();
+
+ /**
+ * Read an opaque byte array from the stream.
+ *
+ * @param aLength the number of bytes that must be read.
+ *
+ * @throws NS_ERROR_FAILURE if it can't read aLength bytes
+ */
+ void readBytes(in uint32_t aLength,
+ [size_is(aLength), retval] out string aString);
+
+ /**
+ * Read an opaque byte array from the stream, storing the results
+ * as an array of PRUint8s.
+ *
+ * @param aLength the number of bytes that must be read.
+ *
+ * @throws NS_ERROR_FAILURE if it can't read aLength bytes
+ */
+ Array<uint8_t> readByteArray(in uint32_t aLength);
+
+ /**
+ * Read opaque bytes from the stream, storing the results in an ArrayBuffer.
+ *
+ * @param aLength the number of bytes that must be read
+ * @param aArrayBuffer the arraybuffer in which to store the results
+ * Note: passing view.buffer, where view is an ArrayBufferView of an
+ * ArrayBuffer, is not valid unless view.byteOffset == 0.
+ *
+ * @return The number of bytes actually read into aArrayBuffer.
+ */
+ [implicit_jscontext]
+ uint64_t readArrayBuffer(in uint64_t aLength, in jsval aArrayBuffer);
+};
+
+%{C++
+
+#ifdef MOZILLA_INTERNAL_API
+#include "nsString.h"
+
+inline nsresult
+NS_ReadOptionalCString(nsIBinaryInputStream* aStream, nsACString& aResult)
+{
+ bool nonnull;
+ nsresult rv = aStream->ReadBoolean(&nonnull);
+ if (NS_SUCCEEDED(rv)) {
+ if (nonnull)
+ rv = aStream->ReadCString(aResult);
+ else
+ aResult.Truncate();
+ }
+ return rv;
+}
+
+inline nsresult
+NS_ReadOptionalString(nsIBinaryInputStream* aStream, nsAString& aResult)
+{
+ bool nonnull;
+ nsresult rv = aStream->ReadBoolean(&nonnull);
+ if (NS_SUCCEEDED(rv)) {
+ if (nonnull)
+ rv = aStream->ReadString(aResult);
+ else
+ aResult.Truncate();
+ }
+ return rv;
+}
+#endif
+
+%}