C++ CFile::Seek方法代码示例

TEST(TestFile, Write)
{
  XFILE::CFile *file;
  const char str[] = "TestFile.Write test string\n";
  char buf[30];
  memset(&buf, 0, sizeof(buf));

  ASSERT_TRUE((file = XBMC_CREATETEMPFILE("")) != NULL);
  file->Close();
  ASSERT_TRUE(file->OpenForWrite(XBMC_TEMPFILEPATH(file), true));
  EXPECT_EQ((int)sizeof(str), file->Write(str, sizeof(str)));
  file->Flush();
  EXPECT_EQ(0, file->GetPosition());
  file->Close();
  ASSERT_TRUE(file->Open(XBMC_TEMPFILEPATH(file)));
  EXPECT_EQ(0, file->GetPosition());
  EXPECT_EQ((int64_t)sizeof(str), file->Seek(0, SEEK_END));
  EXPECT_EQ(0, file->Seek(0, SEEK_SET));
  EXPECT_EQ((int64_t)sizeof(str), file->GetLength());
  EXPECT_EQ(sizeof(str), file->Read(buf, sizeof(buf)));
  file->Flush();
  EXPECT_EQ((int64_t)sizeof(str), file->GetPosition());
  EXPECT_TRUE(!memcmp(str, buf, sizeof(str)));
  file->Close();
  EXPECT_TRUE(XBMC_DELETETEMPFILE(file));
}

/* The tests for XFILE::CFileFactory are tested indirectly through
 * XFILE::CFile. Since most parts of the VFS require some form of
 * network connection, the settings and VFS URLs must be given as
 * arguments in the main testsuite program.
 */
TEST_F(TestFileFactory, Read)
{
  XFILE::CFile file;
  std::string str;
  unsigned int size, i;
  unsigned char buf[16];
  int64_t count = 0;

  std::vector<std::string> urls =
    CXBMCTestUtils::Instance().getTestFileFactoryReadUrls();

  std::vector<std::string>::iterator it;
  for (it = urls.begin(); it < urls.end(); ++it)
  {
    std::cout << "Testing URL: " << *it << std::endl;
    ASSERT_TRUE(file.Open(*it));
    std::cout << "file.GetLength(): " <<
      testing::PrintToString(file.GetLength()) << std::endl;
    std::cout << "file.Seek(file.GetLength() / 2, SEEK_CUR) return value: " <<
      testing::PrintToString(file.Seek(file.GetLength() / 2, SEEK_CUR)) << std::endl;
    std::cout << "file.Seek(0, SEEK_END) return value: " <<
      testing::PrintToString(file.Seek(0, SEEK_END)) << std::endl;
    std::cout << "file.Seek(0, SEEK_SET) return value: " <<
      testing::PrintToString(file.Seek(0, SEEK_SET)) << std::endl;
    std::cout << "File contents:" << std::endl;
    while ((size = file.Read(buf, sizeof(buf))) > 0)
    {
      str = StringUtils::Format("  %08llX", count);
      std::cout << str << "  ";
      count += size;
      for (i = 0; i < size; i++)
      {
        str = StringUtils::Format("%02X ", buf[i]);
        std::cout << str;
      }
      while (i++ < sizeof(buf))
        std::cout << "   ";
      std::cout << " [";
      for (i = 0; i < size; i++)
      {
        if (buf[i] >= ' ' && buf[i] <= '~')
          std::cout << buf[i];
        else
          std::cout << ".";
      }
      std::cout << "]" << std::endl;
    }
    file.Close();
  }
}

static offset_t dvd_file_seek(void *h, offset_t pos, int whence)
{
  if(interrupt_cb(NULL))
    return -1;

  XFILE::CFile *pFile = (XFILE::CFile *)h;
  if(whence == AVSEEK_SIZE)
    return pFile->GetLength();
  else
    return pFile->Seek(pos, whence & ~AVSEEK_FORCE);
}

TEST_F(TestZipFile, Read)
{
  XFILE::CFile file;
  char buf[20];
  memset(&buf, 0, sizeof(buf));
  std::string reffile, strpathinzip;
  CFileItemList itemlist;

  reffile = XBMC_REF_FILE_PATH("xbmc/filesystem/test/reffile.txt.zip");
  CURL zipUrl = URIUtils::CreateArchivePath("zip", CURL(reffile), "");
  ASSERT_TRUE(XFILE::CDirectory::GetDirectory(zipUrl, itemlist, "",
    XFILE::DIR_FLAG_NO_FILE_DIRS));
  EXPECT_GT(itemlist.Size(), 0);
  EXPECT_FALSE(itemlist[0]->GetPath().empty());
  strpathinzip = itemlist[0]->GetPath();
  ASSERT_TRUE(file.Open(strpathinzip));
  EXPECT_EQ(0, file.GetPosition());
  EXPECT_EQ(1616, file.GetLength());
  EXPECT_EQ(sizeof(buf), static_cast<size_t>(file.Read(buf, sizeof(buf))));
  file.Flush();
  EXPECT_EQ(20, file.GetPosition());
  EXPECT_TRUE(!memcmp("About\n-----\nXBMC is ", buf, sizeof(buf) - 1));
  EXPECT_TRUE(file.ReadString(buf, sizeof(buf)));
  EXPECT_EQ(39, file.GetPosition());
  EXPECT_STREQ("an award-winning fr", buf);
  EXPECT_EQ(100, file.Seek(100));
  EXPECT_EQ(100, file.GetPosition());
  EXPECT_EQ(sizeof(buf), static_cast<size_t>(file.Read(buf, sizeof(buf))));
  file.Flush();
  EXPECT_EQ(120, file.GetPosition());
  EXPECT_TRUE(!memcmp("ent hub for digital ", buf, sizeof(buf) - 1));
  EXPECT_EQ(220, file.Seek(100, SEEK_CUR));
  EXPECT_EQ(220, file.GetPosition());
  EXPECT_EQ(sizeof(buf), static_cast<size_t>(file.Read(buf, sizeof(buf))));
  file.Flush();
  EXPECT_EQ(240, file.GetPosition());
  EXPECT_TRUE(!memcmp("rs, XBMC is a non-pr", buf, sizeof(buf) - 1));
  EXPECT_EQ(1596, file.Seek(-(int64_t)sizeof(buf), SEEK_END));
  EXPECT_EQ(1596, file.GetPosition());
  EXPECT_EQ(sizeof(buf), static_cast<size_t>(file.Read(buf, sizeof(buf))));
  file.Flush();
  EXPECT_EQ(1616, file.GetPosition());
  EXPECT_TRUE(!memcmp("multimedia jukebox.\n", buf, sizeof(buf) - 1));
  EXPECT_EQ(-1, file.Seek(100, SEEK_CUR));
  EXPECT_EQ(1616, file.GetPosition());
  EXPECT_EQ(0, file.Seek(0, SEEK_SET));
  EXPECT_EQ(sizeof(buf), static_cast<size_t>(file.Read(buf, sizeof(buf))));
  file.Flush();
  EXPECT_EQ(20, file.GetPosition());
  EXPECT_TRUE(!memcmp("About\n-----\nXBMC is ", buf, sizeof(buf) - 1));
  EXPECT_EQ(0, file.Seek(0, SEEK_SET));
  EXPECT_EQ(-1, file.Seek(-100, SEEK_SET));
  file.Close();
}

//========================================================================
int64_t CFileURLProtocol::SeekEx(URLContext *h, int64_t pos, int whence)
{
  XFILE::CFile *cfile = (XFILE::CFile*)h->priv_data;

  // seek to the end of file
  if (whence == AVSEEK_SIZE)
    pos = cfile->GetLength();
  else
    pos = cfile->Seek(pos, whence & ~AVSEEK_FORCE);

  printf("CFileURLProtocol::SeekEx pos(%lld), whence(%d)\n", pos, whence);

  return pos;
}

TEST(TestRarFile, Read)
{
  XFILE::CFile file;
  char buf[20];
  memset(&buf, 0, sizeof(buf));
  CStdString reffile, strrarpath, strpathinrar;
  CFileItemList itemlist;

  reffile = XBMC_REF_FILE_PATH("xbmc/filesystem/test/reffile.txt.rar");
  URIUtils::CreateArchivePath(strrarpath, "rar", reffile, "");
  ASSERT_TRUE(XFILE::CDirectory::GetDirectory(strrarpath, itemlist, "",
    XFILE::DIR_FLAG_NO_FILE_DIRS));
  strpathinrar = itemlist[0]->GetPath();
  ASSERT_TRUE(file.Open(strpathinrar));
  EXPECT_EQ(0, file.GetPosition());
  EXPECT_EQ(1616, file.GetLength());
  EXPECT_EQ(sizeof(buf), file.Read(buf, sizeof(buf)));
  file.Flush();
  EXPECT_EQ(20, file.GetPosition());
  EXPECT_TRUE(!memcmp("About\n-----\nXBMC is ", buf, sizeof(buf) - 1));
  EXPECT_TRUE(file.ReadString(buf, sizeof(buf)));
  EXPECT_EQ(39, file.GetPosition());
  EXPECT_STREQ("an award-winning fr", buf);
  EXPECT_EQ(100, file.Seek(100));
  EXPECT_EQ(100, file.GetPosition());
  EXPECT_EQ(sizeof(buf), file.Read(buf, sizeof(buf)));
  file.Flush();
  EXPECT_EQ(120, file.GetPosition());
  EXPECT_TRUE(!memcmp("ent hub for digital ", buf, sizeof(buf) - 1));
  EXPECT_EQ(220, file.Seek(100, SEEK_CUR));
  EXPECT_EQ(220, file.GetPosition());
  EXPECT_EQ(sizeof(buf), file.Read(buf, sizeof(buf)));
  file.Flush();
  EXPECT_EQ(240, file.GetPosition());
  EXPECT_TRUE(!memcmp("rs, XBMC is a non-pr", buf, sizeof(buf) - 1));
  EXPECT_EQ(1596, file.Seek(-(int64_t)sizeof(buf), SEEK_END));
  EXPECT_EQ(1596, file.GetPosition());
  EXPECT_EQ(sizeof(buf), file.Read(buf, sizeof(buf)));
  file.Flush();
  EXPECT_EQ(1616, file.GetPosition());
  EXPECT_TRUE(!memcmp("multimedia jukebox.\n", buf, sizeof(buf) - 1));
  EXPECT_EQ(1716, file.Seek(100, SEEK_CUR));
  EXPECT_EQ(1716, file.GetPosition());
  EXPECT_EQ(0, file.Seek(0, SEEK_SET));
  EXPECT_EQ(sizeof(buf), file.Read(buf, sizeof(buf)));
  file.Flush();
  EXPECT_EQ(20, file.GetPosition());
  EXPECT_TRUE(!memcmp("About\n-----\nXBMC is ", buf, sizeof(buf) - 1));
  EXPECT_EQ(0, file.Seek(0, SEEK_SET));
  EXPECT_EQ(-1, file.Seek(-100, SEEK_SET));
  file.Close();
}

//========================================================================
int64_t CFileURLProtocol::SeekEx(AML_URLContext *h, int64_t pos, int whence)
{
  //CLog::Log(LOGDEBUG, "CFileURLProtocol::SeekEx1 pos(%lld), whence(%d)", pos, whence);
  XFILE::CFile *cfile = (XFILE::CFile*)h->priv_data;
  whence &= ~AVSEEK_FORCE;

  // seek to the end of file
  if (pos == -1 || whence == AVSEEK_SIZE)
    pos = cfile->GetLength();
  else
    pos = cfile->Seek(pos, whence);

  //CLog::Log(LOGDEBUG, "CFileURLProtocol::SeekEx2 pos(%lld), whence(%d)", pos, whence);

  return pos;
}

bool CKaraokeLyricsTextKAR::Load()
{
  XFILE::CFile file;
  bool succeed = true;
  m_reportedInvalidVarField = false;

  // Clear the lyrics array
  clearLyrics();

  if ( !file.Open( m_midiFile ) )
    return false;

  m_midiSize = (unsigned int) file.GetLength();

  if ( !m_midiSize )
    return false;  // shouldn't happen, but

  file.Seek( 0, SEEK_SET );

  m_midiData = new unsigned char [ m_midiSize ];

  // Read the whole file
  if ( !m_midiData || file.Read( m_midiData, m_midiSize) != m_midiSize )
    return false;

  file.Close();

  // Parse MIDI
  try
  {
    parseMIDI();
  }
  catch ( const char * p )
  {
    CLog::Log( LOGERROR, "KAR lyrics loader: cannot load file: %s", p );
    succeed = false;
  }

  delete [] m_midiData;
  m_midiData = 0;
  return succeed;
}

TEST(TestRarFile, NormalRAR)
{
  XFILE::CFile file;
  char buf[20];
  memset(&buf, 0, sizeof(buf));
  CStdString reffile, strrarpath, strpathinrar;
  CFileItemList itemlist, itemlistemptydir;
  struct __stat64 stat_buffer;

  reffile = XBMC_REF_FILE_PATH("xbmc/filesystem/test/refRARnormal.rar");
  URIUtils::CreateArchivePath(strrarpath, "rar", reffile, "");
  ASSERT_TRUE(XFILE::CDirectory::GetDirectory(strrarpath, itemlist));
  itemlist.Sort(SORT_METHOD_FULLPATH, SortOrderAscending);

  /* /reffile.txt */
  strpathinrar = itemlist[1]->GetPath();
  ASSERT_TRUE(StringUtils::EndsWith(strpathinrar, "/reffile.txt", true));
  EXPECT_EQ(0, XFILE::CFile::Stat(strpathinrar, &stat_buffer));
  EXPECT_TRUE((stat_buffer.st_mode & S_IFMT) | S_IFREG);

  ASSERT_TRUE(file.Open(strpathinrar));
  EXPECT_EQ(0, file.GetPosition());
  EXPECT_EQ(1616, file.GetLength());
  EXPECT_EQ(sizeof(buf), file.Read(buf, sizeof(buf)));
  file.Flush();
  EXPECT_EQ(20, file.GetPosition());
  EXPECT_TRUE(!memcmp("About\n-----\nXBMC is ", buf, sizeof(buf) - 1));
  EXPECT_TRUE(file.ReadString(buf, sizeof(buf)));
  EXPECT_EQ(39, file.GetPosition());
  EXPECT_STREQ("an award-winning fr", buf);
  EXPECT_EQ(100, file.Seek(100));
  EXPECT_EQ(100, file.GetPosition());
  EXPECT_EQ(sizeof(buf), file.Read(buf, sizeof(buf)));
  file.Flush();
  EXPECT_EQ(120, file.GetPosition());
  EXPECT_TRUE(!memcmp("ent hub for digital ", buf, sizeof(buf) - 1));
  EXPECT_EQ(220, file.Seek(100, SEEK_CUR));
  EXPECT_EQ(220, file.GetPosition());
  EXPECT_EQ(sizeof(buf), file.Read(buf, sizeof(buf)));
  file.Flush();
  EXPECT_EQ(240, file.GetPosition());
  EXPECT_TRUE(!memcmp("rs, XBMC is a non-pr", buf, sizeof(buf) - 1));
  EXPECT_EQ(1596, file.Seek(-(int64_t)sizeof(buf), SEEK_END));
  EXPECT_EQ(1596, file.GetPosition());
  EXPECT_EQ(sizeof(buf), file.Read(buf, sizeof(buf)));
  file.Flush();
  EXPECT_EQ(1616, file.GetPosition());
  EXPECT_TRUE(!memcmp("multimedia jukebox.\n", buf, sizeof(buf) - 1));
  EXPECT_EQ(1716, file.Seek(100, SEEK_CUR));
  EXPECT_EQ(1716, file.GetPosition());
  EXPECT_EQ(0, file.Seek(0, SEEK_SET));
  EXPECT_EQ(sizeof(buf), file.Read(buf, sizeof(buf)));
  file.Flush();
  EXPECT_EQ(20, file.GetPosition());
  EXPECT_TRUE(!memcmp("About\n-----\nXBMC is ", buf, sizeof(buf) - 1));
  EXPECT_EQ(0, file.Seek(0, SEEK_SET));
  EXPECT_EQ(-1, file.Seek(-100, SEEK_SET));
  file.Close();

  /* /testsymlink -> testdir/reffile.txt */
  strpathinrar = itemlist[2]->GetPath();
  ASSERT_TRUE(StringUtils::EndsWith(strpathinrar, "/testsymlink", true));
  EXPECT_EQ(0, XFILE::CFile::Stat(strpathinrar, &stat_buffer));
  EXPECT_TRUE((stat_buffer.st_mode & S_IFMT) | S_IFLNK);

  /*
   * FIXME: Reading symlinks in RARs is currently broken. It takes a long time
   * to read them and they produce erroneous results. The expected result is
   * the target paths of the symlinks.
   */
  ASSERT_TRUE(file.Open(strpathinrar));
  EXPECT_EQ(19, file.GetLength());
  file.Close();

  /* /testsymlinksubdir -> testdir/testsubdir/reffile.txt */
  strpathinrar = itemlist[3]->GetPath();
  ASSERT_TRUE(StringUtils::EndsWith(strpathinrar, "/testsymlinksubdir", true));
  EXPECT_EQ(0, XFILE::CFile::Stat(strpathinrar, &stat_buffer));
  EXPECT_TRUE((stat_buffer.st_mode & S_IFMT) | S_IFLNK);

  ASSERT_TRUE(file.Open(strpathinrar));
  EXPECT_EQ(30, file.GetLength());
  file.Close();

  /* /testdir/ */
  strpathinrar = itemlist[0]->GetPath();
  ASSERT_TRUE(StringUtils::EndsWith(strpathinrar, "/testdir/", true));
  EXPECT_EQ(0, XFILE::CFile::Stat(strpathinrar, &stat_buffer));
  EXPECT_TRUE((stat_buffer.st_mode & S_IFMT) | S_IFDIR);

  itemlist.Clear();
  ASSERT_TRUE(XFILE::CDirectory::GetDirectory(strpathinrar, itemlist));
  itemlist.Sort(SORT_METHOD_FULLPATH, SortOrderAscending);

  /* /testdir/reffile.txt */
  strpathinrar = itemlist[1]->GetPath();
  ASSERT_TRUE(StringUtils::EndsWith(strpathinrar, "/testdir/reffile.txt",
                                    true));
  EXPECT_EQ(0, XFILE::CFile::Stat(strpathinrar, &stat_buffer));
  EXPECT_TRUE((stat_buffer.st_mode & S_IFMT) | S_IFREG);
//.........这里部分代码省略.........

std::vector< CStdString > CKaraokeLyricsTextUStar::readFile(const CStdString & lyricsFile, bool report_errors )
{
  std::vector< CStdString > lines;

  XFILE::CFile file;

  if ( !file.Open( lyricsFile ) )
    return std::vector< CStdString >();

  unsigned int lyricSize = (unsigned int) file.GetLength();

  if ( !lyricSize )
  {
    if ( report_errors )
      CLog::Log( LOGERROR, "UStar lyric loader: lyric file %s has zero length", lyricsFile.c_str() );

    return std::vector< CStdString >();
  }

  // Read the file into memory array
  std::vector<char> lyricData( lyricSize );

  file.Seek( 0, SEEK_SET );

  // Read the whole file
  if ( file.Read( &lyricData[0], lyricSize) != lyricSize )
    return std::vector< CStdString >(); // disk error?

  file.Close();

  // Parse into the string array
  unsigned int offset = 0;
  unsigned int lineoffset = 0;

  while ( offset < lyricSize )
  {
    // End of line?
    if ( lyricData[offset] == 0x0D || lyricData[offset] == 0x0A )
    {
      // An empty line?
      if ( lineoffset != offset )
      {
        lyricData[offset] = '\0';
        lines.push_back( &lyricData[lineoffset] );
      }

      // Point to the next symbol
      lineoffset = offset + 1;
    }

    offset++;
  }

  // Last line, if any
  if ( lineoffset < lyricSize )
  {
    lyricData[lyricSize-1] = '\0';
    lines.push_back( &lyricData[lineoffset] );
  }

  return lines;
}