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141 строка
4.4 KiB
Plaintext
141 строка
4.4 KiB
Plaintext
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla Communicator client code, released
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* March 31, 1998.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998-1999
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsIInputStream.idl"
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#include "nsrootidl.idl"
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/**
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* This interface allows consumption of primitive data types from a "binary
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* stream" containing untagged, big-endian binary data, i.e. as produced by an
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* implementation of nsIBinaryOutputStream. This might be used, for example,
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* to implement network protocols or to read from architecture-neutral disk
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* files, i.e. ones that can be read and written by both big-endian and
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* little-endian platforms.
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*
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* @See nsIBinaryOutputStream
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*/
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[scriptable, uuid(7b456cb0-8772-11d3-90cf-0040056a906e)]
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interface nsIBinaryInputStream : nsIInputStream {
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void setInputStream(in nsIInputStream aInputStream);
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/**
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* Read 8-bits from the stream.
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*
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* @return that byte to be treated as a boolean.
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*/
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PRBool readBoolean();
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PRUint8 read8();
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PRUint16 read16();
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PRUint32 read32();
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PRUint64 read64();
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float readFloat();
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double readDouble();
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/**
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* Read an 8-bit pascal style string from the stream.
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* 32-bit length field, followed by length 8-bit chars.
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*/
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ACString readCString();
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/**
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* Read an 16-bit pascal style string from the stream.
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* 32-bit length field, followed by length PRUnichars.
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*/
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AString readString();
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/**
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* Read an opaque byte array from the stream.
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*
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* @param aLength the number of bytes that must be read.
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*
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* @throws NS_ERROR_FAILURE if it can't read aLength bytes
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*/
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void readBytes(in PRUint32 aLength,
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[size_is(aLength), retval] out string aString);
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/**
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* Read an opaque byte array from the stream, storing the results
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* as an array of PRUint8s.
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*
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* @param aLength the number of bytes that must be read.
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*
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* @throws NS_ERROR_FAILURE if it can't read aLength bytes
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*/
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void readByteArray(in PRUint32 aLength,
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[array, size_is(aLength), retval] out PRUint8 aBytes);
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};
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%{C++
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#ifdef MOZILLA_INTERNAL_API
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#include "nsString.h"
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inline nsresult
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NS_ReadOptionalCString(nsIBinaryInputStream* aStream, nsACString& aResult)
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{
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PRBool nonnull;
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nsresult rv = aStream->ReadBoolean(&nonnull);
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if (NS_SUCCEEDED(rv)) {
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if (nonnull)
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rv = aStream->ReadCString(aResult);
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else
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aResult.Truncate();
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}
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return rv;
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}
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inline nsresult
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NS_ReadOptionalString(nsIBinaryInputStream* aStream, nsAString& aResult)
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{
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PRBool nonnull;
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nsresult rv = aStream->ReadBoolean(&nonnull);
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if (NS_SUCCEEDED(rv)) {
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if (nonnull)
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rv = aStream->ReadString(aResult);
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else
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aResult.Truncate();
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}
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return rv;
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}
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#endif
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%}
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