ptlib.cxx

来自「pwlib源码库」· CXX 代码 · 共 1,293 行 · 第 1/3 页

    if (c <= '9')
      c -= '0';
    else
      c = toupper(c) - 'A' + 10;

    if (c >= base)
      break;

    total = base * total + c;
  }

  return total;
}


///////////////////////////////////////////////////////////////////////////////
// PTime

struct tm * PTime::os_localtime(const time_t * clock, struct tm * tb)
{
  struct tm * tp = ::localtime(clock);
  if (tp != NULL)
    return tp;

  memset(tb, 0, sizeof(*tb));
  return tb;
}


struct tm * PTime::os_gmtime(const time_t * clock, struct tm * tb)
{
  struct tm * tp = ::gmtime(clock);
  if (tp != NULL)
    return tp;

  memset(tb, 0, sizeof(*tb));
  return tb;
}


///////////////////////////////////////////////////////////////////////////////
// PChannel

void PChannel::Construct()
{
}


PString PChannel::GetName() const
{
  PAssertAlways(PUnimplementedFunction);
  return PString();
}


BOOL PChannel::Read(void *, PINDEX)
{
  PAssertAlways(PUnimplementedFunction);
  return FALSE;
}


BOOL PChannel::Write(const void *, PINDEX)
{
  PAssertAlways(PUnimplementedFunction);
  return FALSE;
}


BOOL PChannel::Close()
{
  return FALSE;
}

///////////////////////////////////////////////////////////////////////////////
// Directories

PDirectory PDirectory::GetParent() const
{
  if (IsRoot())
    return *this;
  
  return *this + "..";
}


BOOL PDirectory::Change(const PString & p)
{
  PDirectory d = p;

  if (d[0] != '\\')
    if (_chdrive(toupper(d[0])-'A'+1) != 0)
      return FALSE;

  return _chdir(d + ".") == 0;
}


BOOL PDirectory::Filtered()
{
#if defined(_WIN32)
#ifdef _WIN32_WCE
  USES_CONVERSION;
  char * name = T2A(fileinfo.cFileName);
#else
  char * name = fileinfo.cFileName;
#endif // _WIN32_WCE
#else
  char * name = fileinfo.name;
#endif
  if (strcmp(name, ".") == 0)
    return TRUE;
  if (strcmp(name, "..") == 0)
    return TRUE;
  if (scanMask == PFileInfo::AllPermissions)
    return FALSE;

  PFileInfo inf;
  PAssert(PFile::GetInfo(*this+name, inf), POperatingSystemError);
  return (inf.type&scanMask) == 0;
}


BOOL PDirectory::IsRoot() const
{
  if ((*this)[1] == ':')
    return GetLength() == 3;

  PINDEX pos = FindOneOf("/\\", 2);
  return pos == GetLength();
}


PDirectory PDirectory::GetRoot() const
{
  if ((*this)[1] == ':')
    return Left(3);

  return Left(FindOneOf("/\\", 2));
}


PStringArray PDirectory::GetPath() const
{
  PStringArray path;

  if (IsEmpty())
    return path;

  if ((*this)[1] == ':')
    path = Tokenise("/\\", FALSE);
  else {
    path = Mid(2).Tokenise("/\\", FALSE);
    path[0].Splice("\\\\", 0);
  }

  PINDEX last = path.GetSize()-1;
  while (path[last].IsEmpty())
    path.SetSize(last--);

  return path;
}


BOOL PDirectory::GetInfo(PFileInfo & info) const
{
  return PFile::GetInfo(*this + GetEntryName(), info);
}


///////////////////////////////////////////////////////////////////////////////
// File Path

PFilePath::PFilePath(const PString & str)
  : PCaselessString(PDirectory::CreateFullPath(str, FALSE))
{
}


PFilePath::PFilePath(const char * cstr)
  : PCaselessString(PDirectory::CreateFullPath(cstr, FALSE))
{
}


PFilePath::PFilePath(const char * prefix, const char * dir)
{
  if (dir != NULL) {
    PDirectory tmpdir(dir);
    operator=(tmpdir);
  }
  else {
    PConfig cfg(PConfig::Environment);
    PString path = cfg.GetString("TMPDIR");
    if (path.IsEmpty()) {
      path = cfg.GetString("TMP");
      if (path.IsEmpty())
        path = cfg.GetString("TEMP");
    }
    if (path.IsEmpty() || path[path.GetLength()-1] != '\\')
      path += '\\';
    *this = path;
  }
  if (prefix != NULL)
    *this += prefix;
  else
    *this += "PW";
  *this += "XXXXXX";
  PAssert(_mktemp(GetPointer()) != NULL, "Could not make temporary file");
}


void PFilePath::AssignContents(const PContainer & cont)
{
  PCaselessString::AssignContents(cont);
  PCaselessString::AssignContents(PDirectory::CreateFullPath(*this, FALSE));
}


static PINDEX GetVolumeSubStringLength(const PString & path)
{
  if (path[1] == ':')
    return 2;

  if (path[0] == '\\' && path[1] == '\\') {
    PINDEX backslash = path.Find('\\', 2);
    if (backslash != P_MAX_INDEX) {
      backslash = path.Find('\\', backslash+1);
      if (backslash != P_MAX_INDEX)
        return backslash;
    }
  }

  PINDEX backslash = path.Find('\\');
  if (backslash != P_MAX_INDEX)
    return backslash;

  return 0;
}


PCaselessString PFilePath::GetVolume() const
{
  return Left(GetVolumeSubStringLength(*this));
}


PDirectory PFilePath::GetDirectory() const
{
  PINDEX backslash = FindLast('\\');
  if (backslash != P_MAX_INDEX)
    return Left(backslash+1);

  return PCaselessString();
}


PCaselessString PFilePath::GetPath() const
{
  return operator()(GetVolumeSubStringLength(*this), FindLast('\\', GetLength()-2));
}


PCaselessString PFilePath::GetFileName() const
{
  PINDEX backslash = FindLast('\\', GetLength()-2);
  if (backslash == P_MAX_INDEX)
    backslash = 0;
  else
    backslash++;

  return Mid(backslash);
}


PCaselessString PFilePath::GetTitle() const
{
  PINDEX backslash = FindLast('\\', GetLength()-2);
  if (backslash == P_MAX_INDEX)
    backslash = 0;
  else
    backslash++;

  PINDEX last_dot = FindLast('.');
  if (last_dot < backslash)
    last_dot = P_MAX_INDEX;

  return operator()(backslash, last_dot-1);
}


PCaselessString PFilePath::GetType() const
{
  PINDEX slash = FindLast('\\');
  if (slash == P_MAX_INDEX)
    slash = 0;
  PINDEX dot = FindLast('.');
  if (dot < slash)
    return PCaselessString();
  return operator()(dot, P_MAX_INDEX);
}


void PFilePath::SetType(const PCaselessString & type)
{
  PINDEX dot = Find('.', FindLast('\\'));
  if (dot != P_MAX_INDEX)
    Splice(type, dot, GetLength()-dot);
  else
    *this += type;
}


///////////////////////////////////////////////////////////////////////////////
// PFile

void PFile::SetFilePath(const PString & newName)
{
  if (!IsOpen())
    path = newName;
}


BOOL PFile::Access(const PFilePath & name, OpenMode mode)
{
  int accmode;

  switch (mode) {
    case ReadOnly :
#ifndef R_OK
#define R_OK 4
#endif
      accmode = R_OK;
      break;

    case WriteOnly :
#ifndef W_OK
#define W_OK 2
#endif
      accmode = W_OK;
      break;

    default :
      accmode = R_OK|W_OK;
  }

  return access(name, accmode) == 0;
}


BOOL PFile::Remove(const PFilePath & name, BOOL force)
{
  if (remove(name) == 0)
    return TRUE;
  if (!force || errno != EACCES)
    return FALSE;
  if (_chmod(name, _S_IWRITE) != 0)
    return FALSE;
  return remove(name) == 0;
}


BOOL PFile::Rename(const PFilePath & oldname, const PString & newname, BOOL force)
{
  if (newname.FindOneOf(":\\/") != P_MAX_INDEX) {
#ifdef _WIN32_WCE
    set_errno(EINVAL);
#else
    errno = EINVAL;
#endif // _WIN32_WCE
    return FALSE;
  }
  PString fullname = oldname.GetDirectory() + newname;
  if (rename(oldname, fullname) == 0)
    return TRUE;
  if (!force || errno == ENOENT || !Exists(fullname))
    return FALSE;
  if (!Remove(fullname, TRUE))
    return FALSE;
  return rename(oldname, fullname) == 0;
}


BOOL PFile::Move(const PFilePath & oldname, const PFilePath & newname, BOOL force)
{
  if (rename(oldname, newname) == 0)
    return TRUE;
  if (errno == ENOENT)
    return FALSE;
  if (force && Exists(newname)) {
    if (!Remove(newname, TRUE))
      return FALSE;
    if (rename(oldname, newname) == 0)
      return TRUE;
  }
  return Copy(oldname, newname, force) && Remove(oldname);
}


#ifdef _WIN32_WCE

BOOL PFile::GetInfo(const PFilePath & name, PFileInfo & info)
{
  USES_CONVERSION;
  
  PString fn = name;
  PINDEX pos = fn.GetLength()-1;
  while (PDirectory::IsSeparator(fn[pos]))
    pos--;
  fn.Delete(pos+1, P_MAX_INDEX);
  
  HANDLE hFile = CreateFile(A2T((const char*)fn),0,FILE_SHARE_READ,NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,NULL);
  if (hFile==INVALID_HANDLE_VALUE) 
    return false;
  
  bool res=false;
  BY_HANDLE_FILE_INFORMATION FInfo;
  if (GetFileInformationByHandle(hFile,&FInfo))
  {
    info.created = FileTimeToTime(FInfo.ftCreationTime);
    info.modified = FileTimeToTime(FInfo.ftLastWriteTime);
    info.accessed = FileTimeToTime(FInfo.ftLastAccessTime);
    info.size = (__int64(FInfo.nFileSizeHigh)<<32)+__int64(FInfo.nFileSizeLow);		
    
    info.permissions = PFileInfo::UserRead|PFileInfo::GroupRead|PFileInfo::WorldRead;
    
    if (FInfo.dwFileAttributes & FILE_ATTRIBUTE_READONLY==0)
      info.permissions |= PFileInfo::UserWrite|PFileInfo::GroupWrite|PFileInfo::WorldWrite;
    
    if (FInfo.dwFileAttributes&FILE_ATTRIBUTE_DIRECTORY)
    {