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