C++ CStdString::reserve方法代码示例

void InfoPage::Process()
{
  while (!m_bStop)
  {
    PrintMenu();
    int i;
    static char buff[200] = "";
    scanf("%d %s", &i, buff); 

    if (i == 0) {
      exit(0);
    }
    
    std::map<int, std::pair<InfoPageble*, CStdString> >::iterator iter;
    iter = pages.find(i);
    if (iter != pages.end()) {
      CStdString page;
      CStdString params(buff);
      page.reserve(10000);
      iter->second.first->GetInfoPage(&page, params);
      printf("%s\n", page.c_str());      
    } else {
      printf("Page not found\n");      
    }
  }
}

CStdString CURL::Get() const
{
  unsigned int sizeneed = m_strProtocol.length()
                        + m_strDomain.length()
                        + m_strUserName.length()
                        + m_strPassword.length()
                        + m_strHostName.length()
                        + m_strFileName.length()
                        + m_strOptions.length()
                        + m_strProtocolOptions.length()
                        + 10;

  if (m_strProtocol == "")
    return m_strFileName;

  CStdString strURL;
  strURL.reserve(sizeneed);

  strURL = GetWithoutFilename();
  strURL += m_strFileName;

  if( m_strOptions.length() > 0 )
    strURL += m_strOptions;
  if (m_strProtocolOptions.length() > 0)
    strURL += "|"+m_strProtocolOptions;

  return strURL;
}

void CURL::GetURLWithoutFilename(CStdString& strURL) const
{
  unsigned int sizeneed = m_strProtocol.length()
                        + m_strDomain.length()
                        + m_strUserName.length()
                        + m_strPassword.length()
                        + m_strHostName.length()
                        + 10;

  if( strURL.capacity() < sizeneed )
    strURL.reserve(sizeneed);


  if (m_strProtocol == "")
  {
#ifdef _LINUX
    strURL.Empty();
#else
    strURL = m_strFileName.substr(0, 2); // only copy 'e:'
#endif
    return ;
  }

  strURL = m_strProtocol;
  strURL += "://";

  if (m_strDomain != "")
  {
    strURL += m_strDomain;
    strURL += ";";
  }
  else if (m_strUserName != "")
  {
    strURL += URLEncodeInline(m_strUserName);
    if (m_strPassword != "")
    {
      strURL += ":";
      strURL += URLEncodeInline(m_strPassword);
    }
    strURL += "@";
  }
  else if (m_strDomain != "")
    strURL += "@";

  if (m_strHostName != "")
  {
    if( m_strProtocol.Equals("rar") || m_strProtocol.Equals("zip") || m_strProtocol.Equals("musicsearch"))
      strURL += URLEncodeInline(m_strHostName);
    else
      strURL += m_strHostName;
    if (HasPort())
    {
      CStdString strPort;
      strPort.Format("%i", m_iPort);
      strURL += ":";
      strURL += strPort;
    }
    strURL += "/";
  }
}

bool CXBMCTinyXML::LoadFile(const CStdString &_filename, TiXmlEncoding encoding)
{
  // There was a really terrifying little bug here. The code:
  //    value = filename
  // in the STL case, cause the assignment method of the std::string to
  // be called. What is strange, is that the std::string had the same
  // address as it's c_str() method, and so bad things happen. Looks
  // like a bug in the Microsoft STL implementation.
  // Add an extra string to avoid the crash.
  CStdString filename(_filename);
  value = filename;

  XFILE::CFileStream file;
  if (!file.Open(value))
  {
    SetError(TIXML_ERROR_OPENING_FILE, NULL, NULL, TIXML_ENCODING_UNKNOWN);
    return false;
  }

  // Delete the existing data:
  Clear();
  location.Clear();

  CStdString data;
  data.reserve(8 * 1000);
  StreamIn(&file, &data);
  file.Close();

  Parse(data, NULL, encoding);

  if (Error())
    return false;
  return true;
}

void CURL::GetURL(CStdString& strURL) const
{
  unsigned int sizeneed = m_strProtocol.length()
                        + m_strDomain.length()
                        + m_strUserName.length()
                        + m_strPassword.length()
                        + m_strHostName.length()
                        + m_strFileName.length()
                        + m_strOptions.length()
                        + 10;

  if( strURL.capacity() < sizeneed )
    strURL.reserve(sizeneed);

  if (m_strProtocol == "")
  {
    strURL = m_strFileName;
    return ;
  }
  GetURLWithoutFilename(strURL);
  strURL += m_strFileName;

  if( m_strOptions.length() > 0 )
    strURL += m_strOptions;
}

CStdString CURL::GetWithoutFilename() const
{
  if (m_strProtocol == "")
    return "";

  unsigned int sizeneed = m_strProtocol.length()
                        + m_strDomain.length()
                        + m_strUserName.length()
                        + m_strPassword.length()
                        + m_strHostName.length()
                        + 10;

  CStdString strURL;
  strURL.reserve(sizeneed);

  strURL = m_strProtocol;
  strURL += "://";

  if (m_strDomain != "")
  {
    strURL += m_strDomain;
    strURL += ";";
  }
  else if (m_strUserName != "")
  {
    strURL += URLEncodeInline(m_strUserName);
    if (m_strPassword != "")
    {
      strURL += ":";
      strURL += URLEncodeInline(m_strPassword);
    }
    strURL += "@";
  }
  else if (m_strDomain != "")
    strURL += "@";

  if (m_strHostName != "")
  {
    if( URIUtils::ProtocolHasEncodedHostname(m_strProtocol) )
      strURL += URLEncodeInline(m_strHostName);
    else
      strURL += m_strHostName;
    if (HasPort())
    {
      CStdString strPort;
      strPort.Format("%i", m_iPort);
      strURL += ":";
      strURL += strPort;
    }
    strURL += "/";
  }

  return strURL;
}

  void ILogger::Log(int loglevel, const char *format, ... )
  {
    CStdString strData;

    strData.reserve(16384);
    va_list va;
    va_start(va, format);
    strData.FormatV(format,va);
    va_end(va);

    log(loglevel, strData);
  }

void CLog::DebugLog(const char *format, ... )
{
#ifdef _DEBUG
  CSingleLock waitLock(critSec);

  CStdString strData;
  strData.reserve(16384);

  va_list va;
  va_start(va, format);
  strData.FormatV(format, va);    
  va_end(va);
  
  OutputDebugString(strData.c_str());
  if( strData.Right(1) != "\n" )
    OutputDebugString("\n");
#endif
}

void CURL::Encode(CStdString& strURLData)
{
  CStdString strResult;

  /* wonder what a good value is here is, depends on how often it occurs */
  strResult.reserve( strURLData.length() * 2 );

  for (int i = 0; i < (int)strURLData.size(); ++i)
  {
    int kar = (unsigned char)strURLData[i];
    //if (kar == ' ') strResult += '+'; // obsolete
    if (isalnum(kar) || strchr("-_.!()" , kar) ) // Don't URL encode these according to RFC1738
    {
      strResult += kar;
    }
    else
    {
      CStdString strTmp;
      strTmp.Format("%%%02.2x", kar);
      strResult += strTmp;
    }
  }
  strURLData = strResult;
}

void CURL::Decode(CStdString& strURLData)
//modified to be more accomodating - if a non hex value follows a % take the characters directly and don't raise an error.
// However % characters should really be escaped like any other non safe character (www.rfc-editor.org/rfc/rfc1738.txt)
{
  CStdString strResult;

  /* result will always be less than source */
  strResult.reserve( strURLData.length() );

  for (unsigned int i = 0; i < strURLData.size(); ++i)
  {
    int kar = (unsigned char)strURLData[i];
    if (kar == '+') strResult += ' ';
    else if (kar == '%')
    {
      if (i < strURLData.size() - 2)
      {
        CStdString strTmp;
        strTmp.assign(strURLData.substr(i + 1, 2));
        int dec_num=-1;
        sscanf(strTmp,"%x",(unsigned int *)&dec_num);
        if (dec_num<0 || dec_num>255)
          strResult += kar;
        else
        {
          strResult += (char)dec_num;
          i += 2;
        }
      }
      else
        strResult += kar;
    }
    else strResult += kar;
  }
  strURLData = strResult;
}

void CLog::Log(int loglevel, const char *format, ... )
{
    if (g_advancedSettings.m_logLevel > LOG_LEVEL_NORMAL ||
            (g_advancedSettings.m_logLevel > LOG_LEVEL_NONE && loglevel >= LOGNOTICE))
    {
        CSingleLock waitLock(critSec);
        if (!fd)
        {
            // g_stSettings.m_logFolder is initialized in the CSettings constructor to Q:
            // and if we are running from DVD, it's changed to T: in CApplication::Create()
            CStdString strLogFile, strLogFileOld;

            strLogFile.Format("%sxbmc.log", _P(g_stSettings.m_logFolder).c_str());
            strLogFileOld.Format("%sxbmc.old.log", _P(g_stSettings.m_logFolder).c_str());

#ifndef _LINUX
            ::DeleteFile(strLogFileOld.c_str());
            ::MoveFile(strLogFile.c_str(), strLogFileOld.c_str());
#else
            ::unlink(strLogFileOld.c_str());
            ::rename(strLogFile.c_str(), strLogFileOld.c_str());
#endif

#ifndef _LINUX
            fd = _fsopen(strLogFile, "a+", _SH_DENYWR);
#else
            fd = fopen(strLogFile, "a+");
#endif
        }

        if (!fd)
            return ;

        SYSTEMTIME time;
        GetLocalTime(&time);

        MEMORYSTATUS stat;
        GlobalMemoryStatus(&stat);

        CStdString strPrefix, strData;

#ifdef __APPLE__
        strPrefix.Format("%02.2d:%02.2d:%02.2d T:%lu M:%9ju %7s: ", time.wHour, time.wMinute, time.wSecond, GetCurrentThreadId(), stat.dwAvailPhys, levelNames[loglevel]);
#else
        strPrefix.Format("%02.2d:%02.2d:%02.2d T:%lu M:%9u %7s: ", time.wHour, time.wMinute, time.wSecond, GetCurrentThreadId(), stat.dwAvailPhys, levelNames[loglevel]);
#endif

        strData.reserve(16384);
        va_list va;
        va_start(va, format);
        strData.FormatV(format,va);
        va_end(va);


        int length = 0;
        while ( length != (int)strData.length() )
        {
            length = strData.length();
            strData.TrimRight(" ");
            strData.TrimRight('\n');
            strData.TrimRight("\r");
        }

#if !defined(_LINUX) && (defined(_DEBUG) || defined(PROFILE))
        OutputDebugString(strData.c_str());
        OutputDebugString("\n");
#endif

        /* fixup newline alignment, number of spaces should equal prefix length */
        strData.Replace("\n", "\n                             ");
        strData += "\n";

        fwrite(strPrefix.c_str(), strPrefix.size(), 1, fd);
        fwrite(strData.c_str(), strData.size(), 1, fd);
        fflush(fd);
    }
#ifndef _LINUX
#if defined(_DEBUG) || defined(PROFILE)
    else
    {
        // In debug mode dump everything to devstudio regardless of level
        CSingleLock waitLock(critSec);
        CStdString strData;
        strData.reserve(16384);

        va_list va;
        va_start(va, format);
        strData.FormatV(format, va);
        va_end(va);

        OutputDebugString(strData.c_str());
        if( strData.Right(1) != "\n" )
            OutputDebugString("\n");

    }
#endif
#endif
}

bool CDirectoryTuxBox::GetDirectory(const CStdString& strPath, CFileItemList &items)
{
  // so we know that we have enigma2
  static bool enigma2 = false;
  // Detect and delete slash at end
  CStdString strRoot = strPath;
  if (CUtil::HasSlashAtEnd(strRoot))
  strRoot.Delete(strRoot.size() - 1);

  //Get the request strings
  CStdString strBQRequest;
  CStdString strXMLRootString;
  CStdString strXMLChildString;
  if(!GetRootAndChildString(strRoot, strBQRequest, strXMLRootString, strXMLChildString))
    return false;

  //Set url Protocol
  CURL url(strRoot);
  CStdString strFilter;
  CStdString protocol = url.GetProtocol();
  CStdString strOptions = url.GetOptions();
  url.SetProtocol("http");
  bool bIsBouquet=false;

  int ipoint = strOptions.Find("?path=");
  if (ipoint >=0)
  {
    // send Zap!
    return g_tuxbox.ZapToUrl(url, strOptions, ipoint);
  }
  else
  {
    ipoint = strOptions.Find("&reference=");
    if (ipoint >=0 || enigma2)
    {
      //List reference
      strFilter = strOptions.Right((strOptions.size()-(ipoint+11)));
      bIsBouquet = false; //On Empty is Bouquet
      if (enigma2)
      {
        CStdString strPort;
        strPort.Format(":%i",url.GetPort());
        if (strRoot.Right(strPort.GetLength()) != strPort) // If not root dir, enable Channels
          strFilter = "e2"; // Disable Bouquets for Enigma2

        GetRootAndChildStringEnigma2(strBQRequest, strXMLRootString, strXMLChildString);
        url.SetOptions("");
        url.SetFileName(strBQRequest);
      }
    }
  }
  if(strFilter.IsEmpty())
  {
    url.SetOptions(strBQRequest);
    bIsBouquet = true;
  }
  //Open
  CFileCurl http;
  int iTryConnect = 0;
  int iWaitTimer = 20;
  bool result = false;

  while (iTryConnect < 4)
  {
    http.SetTimeout(iWaitTimer);
    if(http.Open(url))
    {
      //We are connected!
      iTryConnect = 4;

      // restore protocol
      url.SetProtocol(protocol);

      int size_read = 0;
      int size_total = (int)http.GetLength();
      int data_size = 0;
      CStdString data;
      data.reserve(size_total);

      // read response from server into string buffer
      char buffer[16384];
      while ((size_read = http.Read(buffer, sizeof(buffer)-1)) > 0)
      {
        buffer[size_read] = 0;
        data += buffer;
        data_size += size_read;
      }
      http.Close();

      // parse returned xml
      TiXmlDocument doc;
      data.Replace("></",">-</"); //FILL EMPTY ELEMENTS WITH "-"!
      doc.Parse(data.c_str());
      TiXmlElement *root = doc.RootElement();
      if(root == NULL)
      {
        CLog::Log(LOGERROR, "%s - Unable to parse xml", __FUNCTION__);
        CLog::Log(LOGERROR, "%s - Sample follows...\n%s", __FUNCTION__, data.c_str());
        return false;
      }
//.........这里部分代码省略.........

void CLog::Log(int loglevel, const char *format, ... )
{
  if (g_advancedSettings.m_logLevel > LOG_LEVEL_NORMAL ||
     (g_advancedSettings.m_logLevel > LOG_LEVEL_NONE && loglevel >= LOGNOTICE))
  {
    CSingleLock waitLock(critSec);
    if (!m_file)
      return;

    SYSTEMTIME time;
    GetLocalTime(&time);

    MEMORYSTATUS stat;
    GlobalMemoryStatus(&stat);

    CStdString strPrefix, strData;

    strPrefix.Format("%02.2d:%02.2d:%02.2d T:%"PRIu64" M:%9"PRIu64" %7s: ", time.wHour, time.wMinute, time.wSecond, (uint64_t)CThread::GetCurrentThreadId(), (uint64_t)stat.dwAvailPhys, levelNames[loglevel]);

    strData.reserve(16384);
    va_list va;
    va_start(va, format);
    strData.FormatV(format,va);
    va_end(va);

    if (m_repeatLogLevel == loglevel && *m_repeatLine == strData)
    {
      m_repeatCount++;
      return;
    }
    else if (m_repeatCount)
    {
      CStdString strPrefix2, strData2;
      strPrefix2.Format("%02.2d:%02.2d:%02.2d T:%"PRIu64" M:%9"PRIu64" %7s: ", time.wHour, time.wMinute, time.wSecond, (uint64_t)CThread::GetCurrentThreadId(), (uint64_t)stat.dwAvailPhys, levelNames[m_repeatLogLevel]);

      strData2.Format("Previous line repeats %d times." LINE_ENDING, m_repeatCount);
      fwrite(strPrefix2.c_str(),strPrefix2.size(),1,m_file);
      fwrite(strData2.c_str(),strData2.size(),1,m_file);
#if !defined(_LINUX) && (defined(_DEBUG) || defined(PROFILE))
      OutputDebugString(strData2.c_str());
#endif
      m_repeatCount = 0;
    }
    
    *m_repeatLine     = strData;
    m_repeatLogLevel  = loglevel;

    unsigned int length = 0;
    while ( length != strData.length() )
    {
      length = strData.length();
      strData.TrimRight(" ");
      strData.TrimRight('\n');
      strData.TrimRight("\r");
    }

    if (!length)
      return;

#if !defined(_LINUX) && (defined(_DEBUG) || defined(PROFILE))
    OutputDebugString(strData.c_str());
    OutputDebugString("\n");
#endif

    /* fixup newline alignment, number of spaces should equal prefix length */
    strData.Replace("\n", LINE_ENDING"                                            ");
    strData += LINE_ENDING;

    fwrite(strPrefix.c_str(),strPrefix.size(),1,m_file);
    fwrite(strData.c_str(),strData.size(),1,m_file);
    fflush(m_file);
  }
#ifndef _LINUX
#if defined(_DEBUG) || defined(PROFILE)
  else
  {
    // In debug mode dump everything to devstudio regardless of level
    CSingleLock waitLock(critSec);
    CStdString strData;
    strData.reserve(16384);

    va_list va;
    va_start(va, format);
    strData.FormatV(format, va);
    va_end(va);

    OutputDebugString(strData.c_str());
    if( strData.Right(1) != "\n" )
      OutputDebugString("\n");

  }
#endif
#endif
}

CStdString CURL::GetWithoutUserDetails() const
{
  CStdString strURL;

  if (m_strProtocol.Equals("stack"))
  {
    CFileItemList items;
    CStdString strURL2;
    strURL2 = Get();
    XFILE::CStackDirectory dir;
    dir.GetDirectory(strURL2,items);
    vector<CStdString> newItems;
    for (int i=0;i<items.Size();++i)
    {
      CURL url(items[i]->GetPath());
      items[i]->SetPath(url.GetWithoutUserDetails());
      newItems.push_back(items[i]->GetPath());
    }
    dir.ConstructStackPath(newItems,strURL);
    return strURL;
  }

  unsigned int sizeneed = m_strProtocol.length()
                        + m_strDomain.length()
                        + m_strHostName.length()
                        + m_strFileName.length()
                        + m_strOptions.length()
                        + m_strProtocolOptions.length()
                        + 10;

  strURL.reserve(sizeneed);

  if (m_strProtocol == "")
    return m_strFileName;

  strURL = m_strProtocol;
  strURL += "://";

  if (m_strHostName != "")
  {
    if (URIUtils::ProtocolHasParentInHostname(m_strProtocol))
      strURL += CURL(m_strHostName).GetWithoutUserDetails();
    else
      strURL += m_strHostName;

    if ( HasPort() )
    {
      CStdString strPort;
      strPort.Format("%i", m_iPort);
      strURL += ":";
      strURL += strPort;
    }
    strURL += "/";
  }
  strURL += m_strFileName;

  if( m_strOptions.length() > 0 )
    strURL += m_strOptions;
  if( m_strProtocolOptions.length() > 0 )
    strURL += "|"+m_strProtocolOptions;

  return strURL;
}

bool CShoutcastDirectory::GetDirectory(const CStdString& strPath, CFileItemList &items)
{

  CStdString strRoot = strPath;
  if (CUtil::HasSlashAtEnd(strRoot))
    strRoot.Delete(strRoot.size() - 1);

  /* for old users wich doesn't have the full url */
  if( strRoot.Equals("shout://www.shoutcast.com") )
    strRoot = "shout://www.shoutcast.com/sbin/newxml.phtml";

  if (g_directoryCache.GetDirectory(strRoot, items))
    return true;

  CGUIDialogProgress* dlgProgress = (CGUIDialogProgress*)m_gWindowManager.GetWindow(WINDOW_DIALOG_PROGRESS);
  if (dlgProgress)
  {
    dlgProgress->ShowProgressBar(false);
    dlgProgress->SetHeading(260);
    dlgProgress->SetLine(0, 14003);
    dlgProgress->SetLine(1, "");
    dlgProgress->SetLine(2, "");
    dlgProgress->StartModal();
  }

  CURL url(strRoot);
  CStdString protocol = url.GetProtocol();
  url.SetProtocol("http");

  CFileCurl http;

  //CURL doesn't seem to understand that data is encoded.. odd
  // opening as text for now
  //http.SetContentEncoding("deflate");

  if( !http.Open(url, false) ) 
  {
    CLog::Log(LOGERROR, "%s - Unable to get shoutcast dir", __FUNCTION__);
    if (dlgProgress) dlgProgress->Close();
    return false;
  }

  /* restore protocol */
  url.SetProtocol(protocol);

  CStdString content = http.GetContent();
  if( !(content.Equals("text/html") || content.Equals("text/xml") 
	  || content.Equals("text/html;charset=utf-8") || content.Equals("text/xml;charset=utf-8") ))
  {
    CLog::Log(LOGERROR, "%s - Invalid content type %s", __FUNCTION__, content.c_str());
    if (dlgProgress) dlgProgress->Close();
    return false;
  }
  
  
  int size_read = 0;  
  int size_total = (int)http.GetLength();
  int data_size = 0;

  CStdString data;
  data.reserve(size_total);
  
  /* read response from server into string buffer */
  char buffer[16384];
  while( (size_read = http.Read(buffer, sizeof(buffer)-1)) > 0 )
  {
    buffer[size_read] = 0;
    data += buffer;
    data_size += size_read;

    dlgProgress->Progress();

    if (dlgProgress->IsCanceled())
    {
      dlgProgress->Close();
      return false;
    }
  }

  /* parse returned xml */
  TiXmlDocument doc;
  doc.Parse(data.c_str());

  TiXmlElement *root = doc.RootElement();
  if(root == NULL)
  {
    CLog::Log(LOGERROR, "%s - Unable to parse xml", __FUNCTION__);
    CLog::Log(LOGDEBUG, "%s - Sample follows...\n%s", __FUNCTION__, data.c_str());

    dlgProgress->Close();
    return false;
  }

  /* clear data to keep memusage down, not needed anymore */
  data.Empty();

  bool result = false;
  if( strcmp(root->Value(), "genrelist") == 0 )
    result = ParseGenres(root, items, url);
  else if( strcmp(root->Value(), "stationlist") == 0 )
//.........这里部分代码省略.........