/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- * The contents of this file are subject to the Netscape 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/NPL/ * * 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 Netscape are * Copyright (C) 1998-1999 Netscape Communications Corporation. All * Rights Reserved. * */ #include "nsByteArrayInputStream.h" #include "nsMemory.h" NS_IMPL_THREADSAFE_ISUPPORTS2(nsByteArrayInputStream, nsIInputStream, nsIByteArrayInputStream) nsByteArrayInputStream::nsByteArrayInputStream (char *buffer, PRUint32 bytes) : _buffer (buffer), _nbytes (bytes), _pos (0) { } nsByteArrayInputStream::~nsByteArrayInputStream () { if (_buffer != NULL) nsMemory::Free (_buffer); } NS_IMETHODIMP nsByteArrayInputStream::Available (PRUint32* aResult) { if (aResult == NULL) return NS_ERROR_NULL_POINTER; if (_nbytes == 0 || _buffer == NULL) *aResult = 0; else *aResult = _nbytes - _pos; return NS_OK; } NS_IMETHODIMP nsByteArrayInputStream::Read (char* aBuffer, PRUint32 aCount, PRUint32 *aNumRead) { if (aBuffer == NULL || aNumRead == NULL) return NS_ERROR_NULL_POINTER; if (_nbytes == 0) return NS_ERROR_FAILURE; if (aCount == 0 || _pos == _nbytes) *aNumRead = 0; else { NS_ASSERTION (_buffer != NULL, "Stream buffer has been released - there's an ownership problem somewhere!"); if (_buffer == NULL) *aNumRead = 0; else if (aCount > _nbytes - _pos) { memcpy (aBuffer, &_buffer[_pos], *aNumRead = _nbytes - _pos); _pos = _nbytes; } else { memcpy (aBuffer, &_buffer[_pos], *aNumRead = aCount); _pos += aCount; } } return NS_OK; } NS_IMETHODIMP nsByteArrayInputStream::ReadSegments(nsWriteSegmentFun writer, void * aClosure, PRUint32 aCount, PRUint32 *aNumRead) { if (aNumRead == NULL) return NS_ERROR_NULL_POINTER; if (_nbytes == 0) return NS_ERROR_FAILURE; if (aCount == 0 || _pos == _nbytes) *aNumRead = 0; else { NS_ASSERTION (_buffer != NULL, "Stream buffer has been released - there's an ownership problem somewhere!"); PRUint32 readCount = PR_MIN(aCount, (_nbytes - _pos)); if (_buffer == NULL) *aNumRead = 0; else { nsresult rv = writer (this, aClosure, &_buffer[_pos], _pos, readCount, aNumRead); if (NS_SUCCEEDED(rv)) _pos += *aNumRead; } } // do not propogate errors returned from writer! return NS_OK; } NS_IMETHODIMP nsByteArrayInputStream::IsNonBlocking(PRBool *aNonBlocking) { *aNonBlocking = PR_TRUE; return NS_OK; } NS_IMETHODIMP nsByteArrayInputStream::Close () { if (_buffer != NULL) { nsMemory::Free (_buffer); _buffer = NULL; _nbytes = 0; } else return NS_ERROR_FAILURE; return NS_OK; } NS_COM nsresult NS_NewByteArrayInputStream (nsIByteArrayInputStream* *aResult, char * buffer, unsigned long bytes) { if (aResult == NULL) return NS_ERROR_NULL_POINTER; nsIByteArrayInputStream * stream = new nsByteArrayInputStream (buffer, bytes); if (!stream) return NS_ERROR_OUT_OF_MEMORY; NS_ADDREF (stream); *aResult = stream; return NS_OK; }