src/msw/dir.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        msw/dir.cpp
   3 // Purpose:     wxDir implementation for Win32
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     08.12.99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1999 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 // For compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #ifndef WX_PRECOMP
  28     #include "wx/intl.h"
  29     #include "wx/log.h"
  30 #endif // PCH
  31
  32 #include "wx/dir.h"
  33 #include "wx/filefn.h"          // for wxDirExists()
  34
  35 #ifdef __WINDOWS__
  36     #include "wx/msw/private.h"
  37 #endif
  38
  39 // ----------------------------------------------------------------------------
  40 // define the types and functions used for file searching
  41 // ----------------------------------------------------------------------------
  42
  43 typedef WIN32_FIND_DATA FIND_STRUCT;
  44 typedef HANDLE FIND_DATA;
  45 typedef DWORD FIND_ATTR;
  46
  47 static inline FIND_DATA InitFindData() { return INVALID_HANDLE_VALUE; }
  48
  49 static inline bool IsFindDataOk(FIND_DATA fd)
  50 {
  51         return fd != INVALID_HANDLE_VALUE;
  52 }
  53
  54 static inline void FreeFindData(FIND_DATA fd)
  55 {
  56         if ( !::FindClose(fd) )
  57         {
  58             wxLogLastError(_T("FindClose"));
  59         }
  60 }
  61
  62 static inline FIND_DATA FindFirst(const wxString& spec,
  63                                       FIND_STRUCT *finddata)
  64 {
  65         return ::FindFirstFile(spec.fn_str(), finddata);
  66 }
  67
  68 static inline bool FindNext(FIND_DATA fd, FIND_STRUCT *finddata)
  69 {
  70         return ::FindNextFile(fd, finddata) != 0;
  71 }
  72
  73 static const wxChar *GetNameFromFindData(FIND_STRUCT *finddata)
  74 {
  75         return finddata->cFileName;
  76 }
  77
  78 static const FIND_ATTR GetAttrFromFindData(FIND_STRUCT *finddata)
  79 {
  80         return finddata->dwFileAttributes;
  81 }
  82
  83 static inline bool IsDir(FIND_ATTR attr)
  84 {
  85         return (attr & FILE_ATTRIBUTE_DIRECTORY) != 0;
  86 }
  87
  88 static inline bool IsHidden(FIND_ATTR attr)
  89 {
  90         return (attr & (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM)) != 0;
  91 }
  92
  93 // ----------------------------------------------------------------------------
  94 // constants
  95 // ----------------------------------------------------------------------------
  96
  97 #ifndef MAX_PATH
  98     #define MAX_PATH 260        // from VC++ headers
  99 #endif
 100
 101 // ----------------------------------------------------------------------------
 102 // macros
 103 // ----------------------------------------------------------------------------
 104
 105 #define M_DIR       ((wxDirData *)m_data)
 106
 107 // ----------------------------------------------------------------------------
 108 // private classes
 109 // ----------------------------------------------------------------------------
 110
 111 // this class stores everything we need to enumerate the files
 112 class wxDirData
 113 {
 114 public:
 115     wxDirData(const wxString& dirname);
 116     ~wxDirData();
 117
 118     void SetFileSpec(const wxString& filespec) { m_filespec = filespec; }
 119     void SetFlags(int flags) { m_flags = flags; }
 120
 121     void Close();
 122     void Rewind();
 123     bool Read(wxString *filename);
 124
 125     const wxString& GetName() const { return m_dirname; }
 126
 127 private:
 128     FIND_DATA m_finddata;
 129
 130     wxString m_dirname;
 131     wxString m_filespec;
 132
 133     int      m_flags;
 134
 135     DECLARE_NO_COPY_CLASS(wxDirData)
 136 };
 137
 138 // ============================================================================
 139 // implementation
 140 // ============================================================================
 141
 142 // ----------------------------------------------------------------------------
 143 // wxDirData
 144 // ----------------------------------------------------------------------------
 145
 146 wxDirData::wxDirData(const wxString& dirname)
 147          : m_dirname(dirname)
 148 {
 149     m_finddata = InitFindData();
 150 }
 151
 152 wxDirData::~wxDirData()
 153 {
 154     Close();
 155 }
 156
 157 void wxDirData::Close()
 158 {
 159     if ( IsFindDataOk(m_finddata) )
 160     {
 161         FreeFindData(m_finddata);
 162
 163         m_finddata = InitFindData();
 164     }
 165 }
 166
 167 void wxDirData::Rewind()
 168 {
 169     Close();
 170 }
 171
 172 bool wxDirData::Read(wxString *filename)
 173 {
 174     bool first = false;
 175
 176     WIN32_FIND_DATA finddata;
 177     #define PTR_TO_FINDDATA (&finddata)
 178
 179     if ( !IsFindDataOk(m_finddata) )
 180     {
 181         // open first
 182         wxString filespec = m_dirname;
 183         if ( !wxEndsWithPathSeparator(filespec) )
 184         {
 185             filespec += _T('\\');
 186         }
 187         if ( !m_filespec )
 188             filespec += _T("*.*");
 189         else
 190             filespec += m_filespec;
 191
 192         m_finddata = FindFirst(filespec, PTR_TO_FINDDATA);
 193
 194         first = true;
 195     }
 196
 197     if ( !IsFindDataOk(m_finddata) )
 198     {
 199 #ifdef __WIN32__
 200         DWORD err = ::GetLastError();
 201
 202         if ( err != ERROR_FILE_NOT_FOUND && err != ERROR_NO_MORE_FILES )
 203         {
 204             wxLogSysError(err, _("Can not enumerate files in directory '%s'"),
 205                           m_dirname.c_str());
 206         }
 207 #endif // __WIN32__
 208         //else: not an error, just no (such) files
 209
 210         return false;
 211     }
 212
 213     const wxChar *name;
 214     FIND_ATTR attr;
 215
 216     for ( ;; )
 217     {
 218         if ( first )
 219         {
 220             first = false;
 221         }
 222         else
 223         {
 224             if ( !FindNext(m_finddata, PTR_TO_FINDDATA) )
 225             {
 226 #ifdef __WIN32__
 227                 DWORD err = ::GetLastError();
 228
 229                 if ( err != ERROR_NO_MORE_FILES )
 230                 {
 231                     wxLogLastError(_T("FindNext"));
 232                 }
 233 #endif // __WIN32__
 234                 //else: not an error, just no more (such) files
 235
 236                 return false;
 237             }
 238         }
 239
 240         name = GetNameFromFindData(PTR_TO_FINDDATA);
 241         attr = GetAttrFromFindData(PTR_TO_FINDDATA);
 242
 243         // don't return "." and ".." unless asked for
 244         if ( name[0] == _T('.') &&
 245              ((name[1] == _T('.') && name[2] == _T('\0')) ||
 246               (name[1] == _T('\0'))) )
 247         {
 248             if ( !(m_flags & wxDIR_DOTDOT) )
 249                 continue;
 250         }
 251
 252         // check the type now
 253         if ( !(m_flags & wxDIR_FILES) && !IsDir(attr) )
 254         {
 255             // it's a file, but we don't want them
 256             continue;
 257         }
 258         else if ( !(m_flags & wxDIR_DIRS) && IsDir(attr) )
 259         {
 260             // it's a dir, and we don't want it
 261             continue;
 262         }
 263
 264         // finally, check whether it's a hidden file
 265         if ( !(m_flags & wxDIR_HIDDEN) )
 266         {
 267             if ( IsHidden(attr) )
 268             {
 269                 // it's a hidden file, skip it
 270                 continue;
 271             }
 272         }
 273
 274         *filename = name;
 275
 276         break;
 277     }
 278
 279     return true;
 280 }
 281
 282 // ----------------------------------------------------------------------------
 283 // wxDir helpers
 284 // ----------------------------------------------------------------------------
 285
 286 /* static */
 287 bool wxDir::Exists(const wxString& dir)
 288 {
 289     return wxDirExists(dir);
 290 }
 291
 292 // ----------------------------------------------------------------------------
 293 // wxDir construction/destruction
 294 // ----------------------------------------------------------------------------
 295
 296 wxDir::wxDir(const wxString& dirname)
 297 {
 298     m_data = NULL;
 299
 300     (void)Open(dirname);
 301 }
 302
 303 bool wxDir::Open(const wxString& dirname)
 304 {
 305     delete M_DIR;
 306     m_data = new wxDirData(dirname);
 307
 308     return true;
 309 }
 310
 311 bool wxDir::IsOpened() const
 312 {
 313     return m_data != NULL;
 314 }
 315
 316 wxString wxDir::GetName() const
 317 {
 318     wxString name;
 319     if ( m_data )
 320     {
 321         name = M_DIR->GetName();
 322         if ( !name.empty() )
 323         {
 324             // bring to canonical Windows form
 325             name.Replace(_T("/"), _T("\\"));
 326
 327             if ( name.Last() == _T('\\') )
 328             {
 329                 // chop off the last (back)slash
 330                 name.Truncate(name.length() - 1);
 331             }
 332         }
 333     }
 334
 335     return name;
 336 }
 337
 338 wxDir::~wxDir()
 339 {
 340     delete M_DIR;
 341 }
 342
 343 // ----------------------------------------------------------------------------
 344 // wxDir enumerating
 345 // ----------------------------------------------------------------------------
 346
 347 bool wxDir::GetFirst(wxString *filename,
 348                      const wxString& filespec,
 349                      int flags) const
 350 {
 351     wxCHECK_MSG( IsOpened(), false, _T("must wxDir::Open() first") );
 352
 353     M_DIR->Rewind();
 354
 355     M_DIR->SetFileSpec(filespec);
 356     M_DIR->SetFlags(flags);
 357
 358     return GetNext(filename);
 359 }
 360
 361 bool wxDir::GetNext(wxString *filename) const
 362 {
 363     wxCHECK_MSG( IsOpened(), false, _T("must wxDir::Open() first") );
 364
 365     wxCHECK_MSG( filename, false, _T("bad pointer in wxDir::GetNext()") );
 366
 367     return M_DIR->Read(filename);
 368 }
 369
 370 // ----------------------------------------------------------------------------
 371 // wxGetDirectoryTimes: used by wxFileName::GetTimes()
 372 // ----------------------------------------------------------------------------
 373
 374 #ifdef __WIN32__
 375
 376 extern bool
 377 wxGetDirectoryTimes(const wxString& dirname,
 378                     FILETIME *ftAccess, FILETIME *ftCreate, FILETIME *ftMod)
 379 {
 380 #ifdef __WXWINCE__
 381     // FindFirst() is going to fail
 382     wxASSERT_MSG( !dirname.empty(),
 383                   _T("incorrect directory name format in wxGetDirectoryTimes") );
 384 #else
 385     // FindFirst() is going to fail
 386     wxASSERT_MSG( !dirname.empty() && dirname.Last() != _T('\\'),
 387                   _T("incorrect directory name format in wxGetDirectoryTimes") );
 388 #endif
 389
 390     FIND_STRUCT fs;
 391     FIND_DATA fd = FindFirst(dirname, &fs);
 392     if ( !IsFindDataOk(fd) )
 393     {
 394         return false;
 395     }
 396
 397     *ftAccess = fs.ftLastAccessTime;
 398     *ftCreate = fs.ftCreationTime;
 399     *ftMod = fs.ftLastWriteTime;
 400
 401     FindClose(fd);
 402
 403     return true;
 404 }
 405
 406 #endif // __WIN32__
 407