126 lines
4.2 KiB
C++
126 lines
4.2 KiB
C++
/*
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* (c) Copyright Ascensio System SIA 2010-2023
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*
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* This program is a free software product. You can redistribute it and/or
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* modify it under the terms of the GNU Affero General Public License (AGPL)
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* version 3 as published by the Free Software Foundation. In accordance with
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* Section 7(a) of the GNU AGPL its Section 15 shall be amended to the effect
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* that Ascensio System SIA expressly excludes the warranty of non-infringement
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* of any third-party rights.
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*
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* This program is distributed WITHOUT ANY WARRANTY; without even the implied
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* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. For
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* details, see the GNU AGPL at: http://www.gnu.org/licenses/agpl-3.0.html
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*
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* You can contact Ascensio System SIA at 20A-6 Ernesta Birznieka-Upish
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* street, Riga, Latvia, EU, LV-1050.
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*
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* The interactive user interfaces in modified source and object code versions
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* of the Program must display Appropriate Legal Notices, as required under
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* Section 5 of the GNU AGPL version 3.
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*
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* Pursuant to Section 7(b) of the License you must retain the original Product
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* logo when distributing the program. Pursuant to Section 7(e) we decline to
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* grant you any rights under trademark law for use of our trademarks.
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*
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* All the Product's GUI elements, including illustrations and icon sets, as
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* well as technical writing content are licensed under the terms of the
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* Creative Commons Attribution-ShareAlike 4.0 International. See the License
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* terms at http://creativecommons.org/licenses/by-sa/4.0/legalcode
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*
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*/
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#include "fstream_utils.h"
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#include "fstream_wrapper.h"
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#include "stream_utils.h"
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#include "../../../DesktopEditor/common/File.h"
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#include <algorithm>
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using namespace CFCPP;
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CFCPP::Stream CFCPP::OpenFileStream(const std::wstring & filename, bool bRewrite, bool trunc)
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{
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#if defined(_WIN32) || defined(_WIN32_WCE) || defined(_WIN64)
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CFCPP::Stream st;
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// it's not good, but otherwise file doesn't create or if use ios::app, then the seek for writing will be blocked
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if (bRewrite)
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std::wfstream create(filename, std::ios::app | std::ios::out);
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if (trunc && bRewrite)
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st.reset(new FStreamWrapper(filename, std::ios::binary | std::ios::in | std::ios::out | std::ios::trunc));
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else if (bRewrite)
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st.reset(new FStreamWrapper(filename, std::ios::binary | std::ios::in | std::ios::out));
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else
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st.reset(new FStreamWrapper(filename, std::ios::binary | std::ios::in));
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return st;
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#else
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BYTE* pUtf8 = nullptr;
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LONG lLen = 0;
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NSFile::CUtf8Converter::GetUtf8StringFromUnicode(filename.c_str(), filename.length(), pUtf8, lLen, false);
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std::string utf8filename((char*)pUtf8, lLen);
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delete [] pUtf8;
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return OpenFileStream(utf8filename, bRewrite, trunc);
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#endif
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}
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CFCPP::Stream CFCPP::OpenFileStream(const std::string & filename, bool bRewrite, bool trunc)
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{
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CFCPP::Stream st;
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// it's not good, but otherwise file doesn't create or if use ios::app, then the seek for writing will be blocked
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if (bRewrite)
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std::fstream create(filename, std::ios::app | std::ios::out);
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if (trunc && bRewrite)
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st.reset(new FStreamWrapper(filename, std::ios::binary | std::ios::in | std::ios::out | std::ios::trunc));
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else if (bRewrite)
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st.reset(new FStreamWrapper(filename, std::ios::binary | std::ios::in | std::ios::out));
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else
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st.reset(new FStreamWrapper(filename, std::ios::binary | std::ios::in));
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return st;
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}
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_INT64 CFCPP::FileLenght(const std::wstring & filename)
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{
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auto stream = OpenFileStream(filename);
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auto lenght = Length(stream);
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stream->close();
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return lenght;
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}
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ULONG64 CFCPP::FileFNVHash(const std::wstring & filename, _INT64 len, _INT64 offset)
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{
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auto stream = OpenFileStream(filename);
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if (!IsOpen(stream))
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return 0;
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if (len < 0)
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len = Length(stream);
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stream->seek(offset);
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ULONG64 h = 2166136261;
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constexpr _INT64 bufLen = 0x2000;
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char buffer[bufLen];
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while (len > 0)
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{
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memset(buffer, 0, bufLen);
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_INT64 readLen = std::min(bufLen, len);
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stream->read(buffer, readLen);
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_INT64 i;
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for (i = 0; i < readLen; i++)
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h = (h * 16777619) ^ buffer[i];
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len -= readLen;
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}
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return h;
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}
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