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92c7695981
Most streams are backed by a memory buffer. Create common base classes for this functionality to avoid code duplication.
56 lines
1.5 KiB
C++
56 lines
1.5 KiB
C++
/* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
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* Copyright (C) 2013 D. R. Commander. All Rights Reserved.
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* Copyright 2015 Pierre Ossman for Cendio AB
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*
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* This is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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* USA.
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*/
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#include <errno.h>
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#include <rdr/Exception.h>
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#include <rdr/FileInStream.h>
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using namespace rdr;
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FileInStream::FileInStream(const char *fileName)
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{
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file = fopen(fileName, "rb");
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if (!file)
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throw SystemException("fopen", errno);
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}
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FileInStream::~FileInStream(void) {
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if (file) {
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fclose(file);
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file = NULL;
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}
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}
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bool FileInStream::fillBuffer(size_t maxSize, bool wait)
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{
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size_t n = fread((U8 *)end, 1, maxSize, file);
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if (n == 0) {
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if (ferror(file))
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throw SystemException("fread", errno);
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if (feof(file))
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throw EndOfStream();
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return false;
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}
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end += n;
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return true;
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}
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