gecko-dev/xpcom/io/nsIBinaryOutputStream.idl

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Communicator client code, released
* March 31, 1998.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998-1999
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsIOutputStream.idl"
#include "nsrootidl.idl"
/**
* This interface allows writing of primitive data types (integers,
* floating-point values, booleans, etc.) to a stream in a binary, untagged,
* fixed-endianness format. This might be used, for example, to implement
* network protocols or to produce architecture-neutral binary disk files,
* i.e. ones that can be read and written by both big-endian and little-endian
* platforms. Output is written in big-endian order (high-order byte first),
* as this is traditional network order.
*
* @See nsIBinaryInputStream
*/
[scriptable, uuid(204ee610-8765-11d3-90cf-0040056a906e)]
interface nsIBinaryOutputStream : nsIOutputStream {
void setOutputStream(in nsIOutputStream aOutputStream);
/**
* Write a boolean as an 8-bit char to the stream.
*/
void writeBoolean(in boolean aBoolean);
void write8(in PRUint8 aByte);
void write16(in PRUint16 a16);
void write32(in PRUint32 a32);
void write64(in PRUint64 a64);
void writeFloat(in float aFloat);
void writeDouble(in double aDouble);
/**
* Write an 8-bit pascal style string to the stream.
* 32-bit length field, followed by length 8-bit chars.
*/
void writeStringZ(in string aString);
/**
* Write a 16-bit pascal style string to the stream.
* 32-bit length field, followed by length PRUnichars.
*/
void writeWStringZ(in wstring aString);
/**
* Write an 8-bit pascal style string (UTF8-encoded) to the stream.
* 32-bit length field, followed by length 8-bit chars.
*/
void writeUtf8Z(in wstring aString);
/**
* Write an opaque byte array to the stream.
*/
void writeBytes([size_is(aLength)] in string aString, in PRUint32 aLength);
/**
* Write an opaque byte array to the stream.
*/
void writeByteArray([array, size_is(aLength)] in PRUint8 aBytes,
in PRUint32 aLength);
};
%{C++
inline nsresult
NS_WriteOptionalStringZ(nsIBinaryOutputStream* aStream, const char* aString)
{
bool nonnull = (aString != nsnull);
nsresult rv = aStream->WriteBoolean(nonnull);
if (NS_SUCCEEDED(rv) && nonnull)
rv = aStream->WriteStringZ(aString);
return rv;
}
inline nsresult
NS_WriteOptionalWStringZ(nsIBinaryOutputStream* aStream, const PRUnichar* aString)
{
bool nonnull = (aString != nsnull);
nsresult rv = aStream->WriteBoolean(nonnull);
if (NS_SUCCEEDED(rv) && nonnull)
rv = aStream->WriteWStringZ(aString);
return rv;
}
%}