зеркало из https://github.com/mozilla/gecko-dev.git
103 строки
3.4 KiB
C++
103 строки
3.4 KiB
C++
/* -*- 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.org code.
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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
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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 "nsScriptableInputStream.h"
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#include "nsMemory.h"
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NS_IMPL_ISUPPORTS1(nsScriptableInputStream, nsIScriptableInputStream)
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// nsIBaseStream methods
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NS_IMETHODIMP
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nsScriptableInputStream::Close(void) {
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if (!mInputStream) return NS_ERROR_NOT_INITIALIZED;
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return mInputStream->Close();
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}
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// nsIScriptableInputStream methods
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NS_IMETHODIMP
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nsScriptableInputStream::Init(nsIInputStream *aInputStream) {
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if (!aInputStream) return NS_ERROR_NULL_POINTER;
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mInputStream = aInputStream;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsScriptableInputStream::Available(PRUint32 *_retval) {
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if (!mInputStream) return NS_ERROR_NOT_INITIALIZED;
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return mInputStream->Available(_retval);
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}
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NS_IMETHODIMP
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nsScriptableInputStream::Read(PRUint32 aCount, char **_retval) {
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nsresult rv = NS_OK;
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PRUint32 count = 0;
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char *buffer = nsnull;
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if (!mInputStream) return NS_ERROR_NOT_INITIALIZED;
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rv = mInputStream->Available(&count);
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if (NS_FAILED(rv)) return rv;
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count = PR_MIN(count, aCount);
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buffer = (char*)nsMemory::Alloc(count+1); // make room for '\0'
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if (!buffer) return NS_ERROR_OUT_OF_MEMORY;
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PRUint32 amtRead = 0;
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rv = mInputStream->Read(buffer, count, &amtRead);
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if (NS_FAILED(rv)) {
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nsMemory::Free(buffer);
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return rv;
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}
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buffer[amtRead] = '\0';
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*_retval = buffer;
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return NS_OK;
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}
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NS_METHOD
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nsScriptableInputStream::Create(nsISupports *aOuter, REFNSIID aIID, void **aResult) {
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if (aOuter) return NS_ERROR_NO_AGGREGATION;
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nsScriptableInputStream *sis = new nsScriptableInputStream();
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if (!sis) return NS_ERROR_OUT_OF_MEMORY;
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NS_ADDREF(sis);
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nsresult rv = sis->QueryInterface(aIID, aResult);
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NS_RELEASE(sis);
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return rv;
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}
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