mirror of
https://github.com/Team-Resurgent/XBMC4Xbox.git
synced 2026-08-15 11:18:13 -07:00
Rocky5
921f9fe9f8
If ever adding the XBMC4Xbox source to GitHub use "git add -f -A" or it wont add all the files.
1014 lines
22 KiB
C++
1014 lines
22 KiB
C++
/*
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* XBMC Media Center
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* Copyright (c) 2002 Frodo
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* Portions Copyright (c) by the authors of ffmpeg and xvid
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*
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* This program 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 program 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 program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "utils/log.h"
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#include "File.h"
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#include "FileFactory.h"
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#include "Application.h"
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#include "Util.h"
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#include "utils/URIUtils.h"
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#include "DirectoryCache.h"
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#include "FileCache.h"
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#include "utils/Win32Exception.h"
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#include "URL.h"
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using namespace XFILE;
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using namespace std;
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//////////////////////////////////////////////////////////////////////
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// Construction/Destruction
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//////////////////////////////////////////////////////////////////////
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#ifndef __GNUC__
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#pragma warning (disable:4244)
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#endif
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//*********************************************************************************************
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CFile::CFile()
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{
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m_pFile = NULL;
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m_pBuffer = NULL;
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m_flags = 0;
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m_bitStreamStats = NULL;
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}
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//*********************************************************************************************
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CFile::~CFile()
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{
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if (m_pFile)
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SAFE_DELETE(m_pFile);
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if (m_pBuffer)
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SAFE_DELETE(m_pBuffer);
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if (m_bitStreamStats)
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SAFE_DELETE(m_bitStreamStats);
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}
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//*********************************************************************************************
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class CAutoBuffer
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{
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char* p;
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public:
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explicit CAutoBuffer(size_t s) { p = (char*)malloc(s); }
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~CAutoBuffer() { free(p); }
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char* get() { return p; }
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};
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// This *looks* like a copy function, therefor the name "Cache" is misleading
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bool CFile::Cache(const CStdString& strFileName, const CStdString& strDest, XFILE::IFileCallback* pCallback, void* pContext)
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{
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CFile file;
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// special case for zips - ignore caching
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CURL url(strFileName);
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if (URIUtils::IsInZIP(strFileName))
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url.SetOptions("?cache=no");
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if (file.Open(url.Get(), READ_TRUNCATED))
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{
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CFile newFile;
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if (URIUtils::IsHD(strDest)) // create possible missing dirs
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{
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vector<CStdString> tokens;
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CStdString strDirectory;
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URIUtils::GetDirectory(strDest,strDirectory);
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URIUtils::RemoveSlashAtEnd(strDirectory); // for the test below
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if (!(strDirectory.size() == 2 && strDirectory[1] == ':'))
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{
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CURL url(strDirectory);
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CStdString pathsep;
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#ifndef _LINUX
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pathsep = "\\";
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#else
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pathsep = "/";
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#endif
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CUtil::Tokenize(url.GetFileName(),tokens,pathsep.c_str());
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CStdString strCurrPath;
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// Handle special
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if (!url.GetProtocol().IsEmpty()) {
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pathsep = "/";
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strCurrPath += url.GetProtocol() + "://";
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} // If the directory has a / at the beginning, don't forget it
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else if (strDirectory[0] == pathsep[0])
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strCurrPath += pathsep;
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for (vector<CStdString>::iterator iter=tokens.begin();iter!=tokens.end();++iter)
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{
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strCurrPath += *iter+pathsep;
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CDirectory::Create(strCurrPath);
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}
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}
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}
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if (CFile::Exists(strDest))
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CFile::Delete(strDest);
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if (!newFile.OpenForWrite(strDest, true)) // overwrite always
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{
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file.Close();
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return false;
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}
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// 128k is optimal for xbox
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int iBufferSize = 128 * 1024;
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CAutoBuffer buffer(iBufferSize);
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int iRead, iWrite;
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UINT64 llFileSize = file.GetLength();
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UINT64 llPos = 0;
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CStopWatch timer;
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timer.StartZero();
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float start = 0.0f;
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while (true)
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{
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g_application.ResetScreenSaver();
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iRead = file.Read(buffer.get(), iBufferSize);
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if (iRead == 0) break;
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else if (iRead < 0)
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{
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CLog::Log(LOGERROR, "%s - Failed read from file %s", __FUNCTION__, strFileName.c_str());
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llFileSize = (uint64_t)-1;
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break;
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}
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/* write data and make sure we managed to write it all */
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iWrite = 0;
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while(iWrite < iRead)
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{
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int iWrite2 = newFile.Write(buffer.get()+iWrite, iRead-iWrite);
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if(iWrite2 <=0)
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break;
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iWrite+=iWrite2;
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}
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if (iWrite != iRead)
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{
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CLog::Log(LOGERROR, "%s - Failed write to file %s", __FUNCTION__, strDest.c_str());
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llFileSize = (uint64_t)-1;
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break;
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}
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llPos += iRead;
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// calculate the current and average speeds
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float end = timer.GetElapsedSeconds();
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if (pCallback && end - start > 0.5 && end)
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{
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start = end;
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float averageSpeed = llPos / end;
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int ipercent = 0;
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if(llFileSize)
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ipercent = 100 * llPos / llFileSize;
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if(!pCallback->OnFileCallback(pContext, ipercent, averageSpeed))
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{
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CLog::Log(LOGERROR, "%s - User aborted copy", __FUNCTION__);
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llFileSize = (uint64_t)-1;
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break;
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}
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}
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}
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/* close both files */
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newFile.Close();
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file.Close();
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/* verify that we managed to completed the file */
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if (llFileSize && llPos != llFileSize)
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{
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CFile::Delete(strDest);
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return false;
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}
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return true;
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}
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return false;
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}
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//*********************************************************************************************
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bool CFile::Open(const CStdString& strFileName, unsigned int flags)
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{
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m_flags = flags;
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try
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{
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bool bPathInCache;
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CURL url2(strFileName);
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if (url2.GetProtocol() == "zip")
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url2.SetOptions("");
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if (!g_directoryCache.FileExists(url2.Get(), bPathInCache) )
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{
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if (bPathInCache)
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return false;
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}
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CURL url(strFileName);
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if ( (flags & READ_NO_CACHE) == 0 && URIUtils::IsInternetStream(url, true) && !CUtil::IsPicture(strFileName) )
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m_flags |= READ_CACHED;
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if (m_flags & READ_CACHED)
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{
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m_pFile = new CFileCache();
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return m_pFile->Open(url);
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}
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m_pFile = CFileFactory::CreateLoader(url);
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if (!m_pFile)
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return false;
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try
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{
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if (!m_pFile->Open(url))
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{
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SAFE_DELETE(m_pFile);
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return false;
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}
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}
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catch (CRedirectException *pRedirectEx)
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{
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// the file implementation decided this item should use a different implementation.
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// the exception will contain the new implementation.
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CLog::Log(LOGDEBUG,"File::Open - redirecting implementation for %s", strFileName.c_str());
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SAFE_DELETE(m_pFile);
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if (pRedirectEx && pRedirectEx->m_pNewFileImp)
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{
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auto_ptr<CURL> pNewUrl(pRedirectEx->m_pNewUrl);
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m_pFile = pRedirectEx->m_pNewFileImp;
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delete pRedirectEx;
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if (pNewUrl.get())
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{
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if (!m_pFile->Open(*pNewUrl))
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{
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SAFE_DELETE(m_pFile);
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return false;
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}
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}
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else
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{
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if (!m_pFile->Open(url))
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{
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SAFE_DELETE(m_pFile);
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return false;
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}
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}
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}
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}
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catch (...)
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{
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CLog::Log(LOGERROR, "File::Open - unknown exception when opening %s", strFileName.c_str());
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SAFE_DELETE(m_pFile);
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return false;
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}
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if (m_pFile->GetChunkSize() && !(m_flags & READ_CHUNKED))
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{
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m_pBuffer = new CFileStreamBuffer(0);
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m_pBuffer->Attach(m_pFile);
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}
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if (m_flags & READ_BITRATE)
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{
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m_bitStreamStats = new BitstreamStats();
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m_bitStreamStats->Start();
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}
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return true;
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}
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#ifndef _LINUX
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catch (const win32_exception &e)
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{
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e.writelog(__FUNCTION__);
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}
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#endif
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catch(...)
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{
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CLog::Log(LOGERROR, "%s - Unhandled exception", __FUNCTION__);
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}
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CLog::Log(LOGERROR, "%s - Error opening %s", __FUNCTION__, strFileName.c_str());
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return false;
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}
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bool CFile::OpenForWrite(const CStdString& strFileName, bool bOverWrite)
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{
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try
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{
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CURL url(strFileName);
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m_pFile = CFileFactory::CreateLoader(url);
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if (m_pFile && m_pFile->OpenForWrite(url, bOverWrite))
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{
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// add this file to our directory cache (if it's stored)
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g_directoryCache.AddFile(strFileName);
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return true;
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}
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return false;
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}
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#ifndef _LINUX
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catch (const win32_exception &e)
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{
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e.writelog(__FUNCTION__);
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}
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#endif
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catch(...)
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{
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CLog::Log(LOGERROR, "%s - Unhandled exception opening %s", __FUNCTION__, strFileName.c_str());
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}
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CLog::Log(LOGERROR, "%s - Error opening %s", __FUNCTION__, strFileName.c_str());
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return false;
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}
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bool CFile::Exists(const CStdString& strFileName, bool bUseCache /* = true */)
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{
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CURL url;
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try
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{
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if (strFileName.IsEmpty())
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return false;
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if (bUseCache)
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{
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bool bPathInCache;
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if (g_directoryCache.FileExists(strFileName, bPathInCache) )
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return true;
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if (bPathInCache)
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return false;
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}
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url = URIUtils::SubstitutePath(strFileName);
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auto_ptr<IFile> pFile(CFileFactory::CreateLoader(url));
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if (!pFile.get())
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return false;
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return pFile->Exists(url);
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}
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#ifndef _LINUX
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catch (const win32_exception &e)
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{
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e.writelog(__FUNCTION__);
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}
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#endif
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catch (CRedirectException *pRedirectEx)
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{
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// the file implementation decided this item should use a different implementation.
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// the exception will contain the new implementation and optional a redirected URL.
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CLog::Log(LOGDEBUG,"File::Exists - redirecting implementation for %s", strFileName.c_str());
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if (pRedirectEx && pRedirectEx->m_pNewFileImp)
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{
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auto_ptr<IFile> pImp(pRedirectEx->m_pNewFileImp);
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auto_ptr<CURL> pNewUrl(pRedirectEx->m_pNewUrl);
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delete pRedirectEx;
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if (pNewUrl.get())
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{
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if (pImp.get() && !pImp->Exists(*pNewUrl))
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{
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return false;
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}
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}
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else
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{
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if (pImp.get() && !pImp->Exists(url))
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{
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return false;
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}
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}
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}
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}
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catch(...)
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{
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CLog::Log(LOGERROR, "%s - Unhandled exception", __FUNCTION__);
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}
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CLog::Log(LOGERROR, "%s - Error checking for %s", __FUNCTION__, strFileName.c_str());
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return false;
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}
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int CFile::Stat(struct __stat64 *buffer)
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{
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return m_pFile->Stat(buffer);
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}
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int CFile::Stat(const CStdString& strFileName, struct __stat64* buffer)
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{
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CURL url;
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try
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{
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url = URIUtils::SubstitutePath(strFileName);
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auto_ptr<IFile> pFile(CFileFactory::CreateLoader(url));
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if (!pFile.get())
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return false;
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return pFile->Stat(url, buffer);
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}
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#ifndef _LINUX
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catch (const win32_exception &e)
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{
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e.writelog(__FUNCTION__);
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}
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#endif
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catch (CRedirectException *pRedirectEx)
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{
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// the file implementation decided this item should use a different implementation.
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// the exception will contain the new implementation and optional a redirected URL.
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CLog::Log(LOGDEBUG,"File::Stat - redirecting implementation for %s", strFileName.c_str());
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if (pRedirectEx && pRedirectEx->m_pNewFileImp)
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{
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auto_ptr<IFile> pImp(pRedirectEx->m_pNewFileImp);
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auto_ptr<CURL> pNewUrl(pRedirectEx->m_pNewUrl);
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delete pRedirectEx;
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if (pNewUrl.get())
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{
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if (pImp.get() && !pImp->Stat(*pNewUrl, buffer))
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{
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return false;
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}
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}
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else
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{
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if (pImp.get() && !pImp->Stat(url, buffer))
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|
{
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return false;
|
|
}
|
|
}
|
|
}
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|
}
|
|
catch(...)
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|
{
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CLog::Log(LOGERROR, "%s - Unhandled exception", __FUNCTION__);
|
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}
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CLog::Log(LOGERROR, "%s - Error statting %s", __FUNCTION__, strFileName.c_str());
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return -1;
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}
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|
|
unsigned int CFile::Read(void *lpBuf, int64_t uiBufSize)
|
|
{
|
|
if (!m_pFile)
|
|
return 0;
|
|
|
|
if(m_pBuffer)
|
|
{
|
|
if(m_flags & READ_TRUNCATED)
|
|
{
|
|
unsigned int nBytes = m_pBuffer->sgetn(
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(char *)lpBuf, min<streamsize>((streamsize)uiBufSize,
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m_pBuffer->in_avail()));
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if (m_bitStreamStats && nBytes>0)
|
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m_bitStreamStats->AddSampleBytes(nBytes);
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return nBytes;
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|
}
|
|
else
|
|
{
|
|
unsigned int nBytes = m_pBuffer->sgetn((char*)lpBuf, uiBufSize);
|
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if (m_bitStreamStats && nBytes>0)
|
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m_bitStreamStats->AddSampleBytes(nBytes);
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|
return nBytes;
|
|
}
|
|
}
|
|
|
|
try
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|
{
|
|
if(m_flags & READ_TRUNCATED)
|
|
{
|
|
unsigned int nBytes = m_pFile->Read(lpBuf, uiBufSize);
|
|
if (m_bitStreamStats && nBytes>0)
|
|
m_bitStreamStats->AddSampleBytes(nBytes);
|
|
return nBytes;
|
|
}
|
|
else
|
|
{
|
|
unsigned int done = 0;
|
|
while((uiBufSize-done) > 0)
|
|
{
|
|
int curr = m_pFile->Read((char*)lpBuf+done, uiBufSize-done);
|
|
if(curr<=0)
|
|
break;
|
|
|
|
done+=curr;
|
|
}
|
|
if (m_bitStreamStats && done > 0)
|
|
m_bitStreamStats->AddSampleBytes(done);
|
|
return done;
|
|
}
|
|
}
|
|
#ifndef _LINUX
|
|
catch (const win32_exception &e)
|
|
{
|
|
e.writelog(__FUNCTION__);
|
|
}
|
|
#endif
|
|
catch(...)
|
|
{
|
|
CLog::Log(LOGERROR, "%s - Unhandled exception", __FUNCTION__);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
//*********************************************************************************************
|
|
void CFile::Close()
|
|
{
|
|
try
|
|
{
|
|
if (m_pFile)
|
|
m_pFile->Close();
|
|
|
|
SAFE_DELETE(m_pBuffer);
|
|
SAFE_DELETE(m_pFile);
|
|
}
|
|
#ifndef _LINUX
|
|
catch (const win32_exception &e)
|
|
{
|
|
e.writelog(__FUNCTION__);
|
|
}
|
|
#endif
|
|
catch(...)
|
|
{
|
|
CLog::Log(LOGERROR, "%s - Unhandled exception", __FUNCTION__);
|
|
}
|
|
return;
|
|
}
|
|
|
|
void CFile::Flush()
|
|
{
|
|
try
|
|
{
|
|
if (m_pFile)
|
|
m_pFile->Flush();
|
|
}
|
|
#ifndef _LINUX
|
|
catch (const win32_exception &e)
|
|
{
|
|
e.writelog(__FUNCTION__);
|
|
}
|
|
#endif
|
|
catch(...)
|
|
{
|
|
CLog::Log(LOGERROR, "%s - Unhandled exception", __FUNCTION__);
|
|
}
|
|
return;
|
|
}
|
|
|
|
//*********************************************************************************************
|
|
int64_t CFile::Seek(int64_t iFilePosition, int iWhence)
|
|
{
|
|
if (!m_pFile)
|
|
return -1;
|
|
|
|
if (m_pBuffer)
|
|
{
|
|
if(iWhence == SEEK_CUR)
|
|
return m_pBuffer->pubseekoff(iFilePosition,ios_base::cur);
|
|
else if(iWhence == SEEK_END)
|
|
return m_pBuffer->pubseekoff(iFilePosition,ios_base::end);
|
|
else if(iWhence == SEEK_SET)
|
|
return m_pBuffer->pubseekoff(iFilePosition,ios_base::beg);
|
|
}
|
|
|
|
try
|
|
{
|
|
return m_pFile->Seek(iFilePosition, iWhence);
|
|
}
|
|
#ifndef _LINUX
|
|
catch (const win32_exception &e)
|
|
{
|
|
e.writelog(__FUNCTION__);
|
|
}
|
|
#endif
|
|
catch(...)
|
|
{
|
|
CLog::Log(LOGERROR, "%s - Unhandled exception", __FUNCTION__);
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
//*********************************************************************************************
|
|
int64_t CFile::GetLength()
|
|
{
|
|
try
|
|
{
|
|
if (m_pFile)
|
|
return m_pFile->GetLength();
|
|
return 0;
|
|
}
|
|
#ifndef _LINUX
|
|
catch (const win32_exception &e)
|
|
{
|
|
e.writelog(__FUNCTION__);
|
|
}
|
|
#endif
|
|
catch(...)
|
|
{
|
|
CLog::Log(LOGERROR, "%s - Unhandled exception", __FUNCTION__);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
//*********************************************************************************************
|
|
int64_t CFile::GetPosition()
|
|
{
|
|
if (!m_pFile)
|
|
return -1;
|
|
|
|
if (m_pBuffer)
|
|
return m_pBuffer->pubseekoff(0, ios_base::cur);
|
|
|
|
try
|
|
{
|
|
return m_pFile->GetPosition();
|
|
}
|
|
#ifndef _LINUX
|
|
catch (const win32_exception &e)
|
|
{
|
|
e.writelog(__FUNCTION__);
|
|
}
|
|
#endif
|
|
catch(...)
|
|
{
|
|
CLog::Log(LOGERROR, "%s - Unhandled exception", __FUNCTION__);
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
|
|
//*********************************************************************************************
|
|
bool CFile::ReadString(char *szLine, int iLineLength)
|
|
{
|
|
if (!m_pFile)
|
|
return false;
|
|
|
|
if (m_pBuffer)
|
|
{
|
|
typedef CFileStreamBuffer::traits_type traits;
|
|
CFileStreamBuffer::int_type aByte = m_pBuffer->sgetc();
|
|
|
|
if(aByte == traits::eof())
|
|
return false;
|
|
|
|
while(iLineLength>0)
|
|
{
|
|
aByte = m_pBuffer->sbumpc();
|
|
|
|
if(aByte == traits::eof())
|
|
break;
|
|
|
|
if(aByte == traits::to_int_type('\n'))
|
|
{
|
|
if(m_pBuffer->sgetc() == traits::to_int_type('\r'))
|
|
m_pBuffer->sbumpc();
|
|
break;
|
|
}
|
|
|
|
if(aByte == traits::to_int_type('\r'))
|
|
{
|
|
if(m_pBuffer->sgetc() == traits::to_int_type('\n'))
|
|
m_pBuffer->sbumpc();
|
|
break;
|
|
}
|
|
|
|
*szLine = traits::to_char_type(aByte);
|
|
szLine++;
|
|
iLineLength--;
|
|
}
|
|
|
|
// if we have no space for terminating character we failed
|
|
if(iLineLength==0)
|
|
return false;
|
|
|
|
*szLine = 0;
|
|
|
|
return true;
|
|
}
|
|
|
|
try
|
|
{
|
|
return m_pFile->ReadString(szLine, iLineLength);
|
|
}
|
|
#ifndef _LINUX
|
|
catch (const win32_exception &e)
|
|
{
|
|
e.writelog(__FUNCTION__);
|
|
}
|
|
#endif
|
|
catch(...)
|
|
{
|
|
CLog::Log(LOGERROR, "%s - Unhandled exception", __FUNCTION__);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
int CFile::Write(const void* lpBuf, int64_t uiBufSize)
|
|
{
|
|
try
|
|
{
|
|
return m_pFile->Write(lpBuf, uiBufSize);
|
|
}
|
|
#ifndef _LINUX
|
|
catch (const win32_exception &e)
|
|
{
|
|
e.writelog(__FUNCTION__);
|
|
}
|
|
#endif
|
|
catch(...)
|
|
{
|
|
CLog::Log(LOGERROR, "%s - Unhandled exception", __FUNCTION__);
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
bool CFile::Delete(const CStdString& strFileName)
|
|
{
|
|
try
|
|
{
|
|
CURL url(strFileName);
|
|
|
|
auto_ptr<IFile> pFile(CFileFactory::CreateLoader(url));
|
|
if (!pFile.get())
|
|
return false;
|
|
|
|
if(pFile->Delete(url))
|
|
{
|
|
g_directoryCache.ClearFile(strFileName);
|
|
return true;
|
|
}
|
|
}
|
|
#ifndef _LINUX
|
|
catch (const access_violation &e)
|
|
{
|
|
e.writelog(__FUNCTION__);
|
|
}
|
|
catch (const win32_exception &e)
|
|
{
|
|
e.writelog(__FUNCTION__);
|
|
}
|
|
#endif
|
|
catch(...)
|
|
{
|
|
CLog::Log(LOGERROR, "%s - Unhandled exception", __FUNCTION__);
|
|
}
|
|
if (Exists(strFileName))
|
|
CLog::Log(LOGERROR, "%s - Error deleting file %s", __FUNCTION__, strFileName.c_str());
|
|
return false;
|
|
}
|
|
|
|
bool CFile::Rename(const CStdString& strFileName, const CStdString& strNewFileName)
|
|
{
|
|
try
|
|
{
|
|
CURL url(strFileName);
|
|
CURL urlnew(strNewFileName);
|
|
|
|
auto_ptr<IFile> pFile(CFileFactory::CreateLoader(url));
|
|
if (!pFile.get())
|
|
return false;
|
|
|
|
if(pFile->Rename(url, urlnew))
|
|
{
|
|
g_directoryCache.ClearFile(strFileName);
|
|
g_directoryCache.ClearFile(strNewFileName);
|
|
return true;
|
|
}
|
|
}
|
|
#ifndef _LINUX
|
|
catch (const win32_exception &e)
|
|
{
|
|
e.writelog(__FUNCTION__);
|
|
}
|
|
#endif
|
|
catch(...)
|
|
{
|
|
CLog::Log(LOGERROR, "%s - Unhandled exception ", __FUNCTION__);
|
|
}
|
|
CLog::Log(LOGERROR, "%s - Error renaming file %s", __FUNCTION__, strFileName.c_str());
|
|
return false;
|
|
}
|
|
|
|
int CFile::IoControl(EIoControl request, void* param)
|
|
{
|
|
int result = -1;
|
|
if (m_pFile == NULL)
|
|
return -1;
|
|
result = m_pFile->IoControl(request, param);
|
|
|
|
if(result == -1 && request == IOCTRL_SEEK_POSSIBLE)
|
|
{
|
|
if(m_pFile->GetLength() >= 0 && m_pFile->Seek(0, SEEK_CUR) >= 0)
|
|
return 1;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
//*********************************************************************************************
|
|
//*************** Stream IO for CFile objects *************************************************
|
|
//*********************************************************************************************
|
|
CFileStreamBuffer::~CFileStreamBuffer()
|
|
{
|
|
sync();
|
|
Detach();
|
|
}
|
|
|
|
CFileStreamBuffer::CFileStreamBuffer(int backsize)
|
|
: streambuf()
|
|
, m_file(NULL)
|
|
, m_buffer(NULL)
|
|
, m_backsize(backsize)
|
|
, m_frontsize(0)
|
|
{
|
|
}
|
|
|
|
void CFileStreamBuffer::Attach(IFile *file)
|
|
{
|
|
m_file = file;
|
|
|
|
m_frontsize = CFile::GetChunkSize(m_file->GetChunkSize(), 64*1024);
|
|
|
|
m_buffer = new char[m_frontsize+m_backsize];
|
|
setg(0,0,0);
|
|
setp(0,0);
|
|
}
|
|
|
|
void CFileStreamBuffer::Detach()
|
|
{
|
|
setg(0,0,0);
|
|
setp(0,0);
|
|
delete[] m_buffer;
|
|
m_buffer = NULL;
|
|
}
|
|
|
|
CFileStreamBuffer::int_type CFileStreamBuffer::underflow()
|
|
{
|
|
if(gptr() < egptr())
|
|
return traits_type::to_int_type(*gptr());
|
|
|
|
if(!m_file)
|
|
return traits_type::eof();
|
|
|
|
size_t backsize = 0;
|
|
if(m_backsize)
|
|
{
|
|
backsize = (size_t)min<ptrdiff_t>((ptrdiff_t)m_backsize, egptr()-eback());
|
|
memmove(m_buffer, egptr()-backsize, backsize);
|
|
}
|
|
|
|
unsigned int size = 0;
|
|
#ifndef _LINUX
|
|
try
|
|
{
|
|
#endif
|
|
size = m_file->Read(m_buffer+backsize, m_frontsize);
|
|
#ifndef _LINUX
|
|
}
|
|
catch (const win32_exception &e)
|
|
{
|
|
e.writelog(__FUNCTION__);
|
|
}
|
|
#endif
|
|
|
|
if(size == 0)
|
|
return traits_type::eof();
|
|
|
|
setg(m_buffer, m_buffer+backsize, m_buffer+backsize+size);
|
|
return traits_type::to_int_type(*gptr());
|
|
}
|
|
|
|
CFileStreamBuffer::pos_type CFileStreamBuffer::seekoff(
|
|
off_type offset,
|
|
ios_base::seekdir way,
|
|
ios_base::openmode mode)
|
|
{
|
|
// calculate relative offset
|
|
off_type pos = m_file->GetPosition() - (egptr() - gptr());
|
|
off_type offset2;
|
|
if(way == ios_base::cur)
|
|
offset2 = offset;
|
|
else if(way == ios_base::beg)
|
|
offset2 = offset - pos;
|
|
else if(way == ios_base::end)
|
|
offset2 = offset + m_file->GetLength() - pos;
|
|
else
|
|
return streampos(-1);
|
|
|
|
// a non seek shouldn't modify our buffer
|
|
if(offset2 == 0)
|
|
return pos;
|
|
|
|
// try to seek within buffer
|
|
if(gptr()+offset2 >= eback() && gptr()+offset2 < egptr())
|
|
{
|
|
gbump(offset2);
|
|
return pos + offset2;
|
|
}
|
|
|
|
// reset our buffer pointer, will
|
|
// start buffering on next read
|
|
setg(0,0,0);
|
|
setp(0,0);
|
|
|
|
int64_t position = -1;
|
|
#ifndef _LINUX
|
|
try
|
|
{
|
|
#endif
|
|
if(way == ios_base::cur)
|
|
position = m_file->Seek(offset, SEEK_CUR);
|
|
else if(way == ios_base::end)
|
|
position = m_file->Seek(offset, SEEK_END);
|
|
else
|
|
position = m_file->Seek(offset, SEEK_SET);
|
|
#ifndef _LINUX
|
|
}
|
|
catch (const win32_exception &e)
|
|
{
|
|
e.writelog(__FUNCTION__);
|
|
return streampos(-1);
|
|
}
|
|
#endif
|
|
|
|
if(position<0)
|
|
return streampos(-1);
|
|
|
|
return position;
|
|
}
|
|
|
|
CFileStreamBuffer::pos_type CFileStreamBuffer::seekpos(
|
|
pos_type pos,
|
|
ios_base::openmode mode)
|
|
{
|
|
return seekoff(pos, ios_base::beg, mode);
|
|
}
|
|
|
|
streamsize CFileStreamBuffer::showmanyc()
|
|
{
|
|
underflow();
|
|
return egptr() - gptr();
|
|
}
|
|
|
|
CFileStream::CFileStream(int backsize /*= 0*/) :
|
|
istream(&m_buffer),
|
|
m_buffer(backsize),
|
|
m_file(NULL)
|
|
{
|
|
}
|
|
|
|
CFileStream::~CFileStream()
|
|
{
|
|
Close();
|
|
}
|
|
|
|
|
|
bool CFileStream::Open(const CURL& filename)
|
|
{
|
|
Close();
|
|
|
|
m_file = CFileFactory::CreateLoader(filename);
|
|
if(m_file && m_file->Open(filename))
|
|
{
|
|
m_buffer.Attach(m_file);
|
|
return true;
|
|
}
|
|
|
|
setstate(failbit);
|
|
return false;
|
|
}
|
|
|
|
int64_t CFileStream::GetLength()
|
|
{
|
|
return m_file->GetLength();
|
|
}
|
|
|
|
void CFileStream::Close()
|
|
{
|
|
if(!m_file)
|
|
return;
|
|
|
|
m_buffer.Detach();
|
|
SAFE_DELETE(m_file);
|
|
}
|
|
|
|
bool CFileStream::Open(const CStdString& filename)
|
|
{
|
|
return Open(CURL(filename));
|
|
}
|