1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ 2 /* 3 * This file is part of the LibreOffice project. 4 * 5 * This Source Code Form is subject to the terms of the Mozilla Public 6 * License, v. 2.0. If a copy of the MPL was not distributed with this 7 * file, You can obtain one at http://mozilla.org/MPL/2.0/. 8 * 9 * This file incorporates work covered by the following license notice: 10 * 11 * Licensed to the Apache Software Foundation (ASF) under one or more 12 * contributor license agreements. See the NOTICE file distributed 13 * with this work for additional information regarding copyright 14 * ownership. The ASF licenses this file to you under the Apache 15 * License, Version 2.0 (the "License"); you may not use this file 16 * except in compliance with the License. You may obtain a copy of 17 * the License at http://www.apache.org/licenses/LICENSE-2.0 . 18 */ 19 20 #ifndef INCLUDED_UNOTOOLS_STREAMHELPER_HXX 21 #define INCLUDED_UNOTOOLS_STREAMHELPER_HXX 22 23 #include <unotools/unotoolsdllapi.h> 24 #include <com/sun/star/io/XInputStream.hpp> 25 #include <com/sun/star/io/XSeekable.hpp> 26 #include <osl/mutex.hxx> 27 #include <cppuhelper/implbase.hxx> 28 #include <tools/stream.hxx> 29 30 namespace utl 31 { 32 33 /** 34 * The helper implementation for a using input streams based on SvLockBytes. 35 */ 36 class UNOTOOLS_DLLPUBLIC OInputStreamHelper final : public cppu::WeakImplHelper<css::io::XInputStream, css::io::XSeekable> 37 { 38 ::osl::Mutex m_aMutex; 39 SvLockBytesRef m_xLockBytes; 40 sal_uInt64 m_nActPos; 41 sal_Int32 m_nAvailable; // this is typically the chunk(buffer) size 42 43 public: OInputStreamHelper(const SvLockBytesRef & _xLockBytes,sal_uInt32 _nAvailable)44 OInputStreamHelper(const SvLockBytesRef& _xLockBytes, 45 sal_uInt32 _nAvailable) 46 :m_xLockBytes(_xLockBytes) 47 ,m_nActPos(0) 48 ,m_nAvailable(_nAvailable){} 49 50 // css::io::XInputStream 51 virtual sal_Int32 SAL_CALL readBytes( css::uno::Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead ) override; 52 virtual sal_Int32 SAL_CALL readSomeBytes( css::uno::Sequence< sal_Int8 >& aData, sal_Int32 nMaxBytesToRead ) override; 53 virtual void SAL_CALL skipBytes( sal_Int32 nBytesToSkip ) override; 54 virtual sal_Int32 SAL_CALL available( ) override; 55 virtual void SAL_CALL closeInput( ) override; 56 57 virtual void SAL_CALL seek( sal_Int64 location ) override; 58 virtual sal_Int64 SAL_CALL getPosition( ) override; 59 virtual sal_Int64 SAL_CALL getLength( ) override; 60 }; 61 62 } // namespace utl 63 64 #endif // _UNOTOOLS_STREAM_WRAPPER_HXX_ 65 66 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */ 67