gecko-dev/xpcom/io/nsStringStream.h

109 строки
4.4 KiB
C

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** 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.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* darin@netscape.com (original author)
*
* 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 ***** */
#ifndef nsStringStream_h__
#define nsStringStream_h__
#include "nsIStringStream.h"
#include "nsStringGlue.h"
#include "nsMemory.h"
/**
* Implements:
* nsIStringInputStream
* nsIInputStream
* nsISeekableStream
* nsISupportsCString
*/
#define NS_STRINGINPUTSTREAM_CLASSNAME "nsStringInputStream"
#define NS_STRINGINPUTSTREAM_CONTRACTID "@mozilla.org/io/string-input-stream;1"
#define NS_STRINGINPUTSTREAM_CID \
{ /* 0abb0835-5000-4790-af28-61b3ba17c295 */ \
0x0abb0835, \
0x5000, \
0x4790, \
{0xaf, 0x28, 0x61, 0xb3, 0xba, 0x17, 0xc2, 0x95} \
}
/**
* Factory method to get an nsInputStream from a byte buffer. Result will
* implement nsIStringInputStream and nsISeekableStream.
*
* If aAssignment is NS_ASSIGNMENT_COPY, then the resulting stream holds a copy
* of the given buffer (aStringToRead), and the caller is free to discard
* aStringToRead after this function returns.
*
* If aAssignment is NS_ASSIGNMENT_DEPEND, then the resulting stream refers
* directly to the given buffer (aStringToRead), so the caller must ensure that
* the buffer remains valid for the lifetime of the stream object. Use with
* care!!
*
* If aAssignment is NS_ASSIGNMENT_ADOPT, then the resulting stream refers
* directly to the given buffer (aStringToRead) and will free aStringToRead
* once the stream is closed.
*
* If aLength is less than zero, then the length of aStringToRead will be
* determined by scanning the buffer for the first null byte.
*/
extern NS_COM nsresult
NS_NewByteInputStream(nsIInputStream** aStreamResult,
const char* aStringToRead, PRInt32 aLength = -1,
nsAssignmentType aAssignment = NS_ASSIGNMENT_DEPEND);
/**
* Factory method to get an nsInputStream from an nsAString. Result will
* implement nsIStringInputStream and nsISeekableStream.
*
* The given string data will be converted to a single-byte data buffer via
* truncation (i.e., the high-order byte of each character will be discarded).
* This could result in data-loss, so be careful when using this function.
*/
extern NS_COM nsresult
NS_NewStringInputStream(nsIInputStream** aStreamResult,
const nsAString& aStringToRead);
/**
* Factory method to get an nsInputStream from an nsACString. Result will
* implement nsIStringInputStream and nsISeekableStream.
*/
extern NS_COM nsresult
NS_NewCStringInputStream(nsIInputStream** aStreamResult,
const nsACString& aStringToRead);
#endif // nsStringStream_h__