mirror of
https://github.com/mozilla/gecko-dev.git
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88 lines
2.6 KiB
C++
88 lines
2.6 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the 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 Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s): Jud Valeski & Brendan Eich
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*/
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#include "nsScriptableInputStream.h"
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#include "nsIAllocator.h"
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NS_IMPL_ISUPPORTS2(nsScriptableInputStream, nsIBaseStream, 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*)nsAllocator::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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nsAllocator::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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