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 license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  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 // ----------------------------------------------------------------------------
  40 // define the types and functions used for file searching
  41 // ----------------------------------------------------------------------------
  42
  43 // under Win16 use compiler-specific functions
  44 #ifdef __WIN16__
  45     #ifdef __VISUALC__
  46         #include <dos.h>
  47         #include <errno.h>
  48
  49         typedef struct _find_t FIND_STRUCT;
  50     #elif defined(__BORLANDC__)
  51         #include <dir.h>
  52
  53         typedef struct ffblk FIND_STRUCT;
  54     #else
  55         #error "No directory searching functions for this compiler"
  56     #endif
  57
  58     typedef FIND_STRUCT *FIND_DATA;
  59     typedef char FIND_ATTR;
  60
  61     static inline FIND_DATA InitFindData() { return (FIND_DATA)NULL; }
  62     static inline bool IsFindDataOk(FIND_DATA fd) { return fd != NULL; }
  63     static inline void FreeFindData(FIND_DATA fd) { free(fd); }
  64
  65     static inline FIND_DATA FindFirst(const wxString& spec,
  66                                       FIND_STRUCT * WXUNUSED(finddata))
  67     {
  68         // attribute to find all files
  69         static const FIND_ATTR attr = 0x3F;
  70
  71         FIND_DATA fd = (FIND_DATA)malloc(sizeof(FIND_STRUCT));
  72
  73         if (
  74         #ifdef __VISUALC__
  75             _dos_findfirst(spec, attr, fd) == 0
  76         #else // Borland
  77             findfirst(spec, fd, attr) == 0
  78         #endif
  79            )
  80         {
  81             return fd;
  82         }
  83         else
  84         {
  85             free(fd);
  86
  87             return NULL;
  88         }
  89     }
  90
  91     static inline bool FindNext(FIND_DATA fd, FIND_STRUCT * WXUNUSED(finddata))
  92     {
  93         #ifdef __VISUALC__
  94             return _dos_findnext(fd) == 0;
  95         #else // Borland
  96             return findnext(fd) == 0;
  97         #endif
  98     }
  99
 100     static const wxChar *GetNameFromFindData(FIND_STRUCT *finddata)
 101     {
 102         #ifdef __VISUALC__
 103             return finddata->name;
 104         #else // Borland
 105             return finddata->ff_name;
 106         #endif
 107     }
 108
 109     static const FIND_ATTR GetAttrFromFindData(FIND_STRUCT *finddata)
 110     {
 111         #ifdef __VISUALC__
 112             return finddata->attrib;
 113         #else // Borland
 114             return finddata->ff_attrib;
 115         #endif
 116     }
 117
 118     static inline bool IsDir(FIND_ATTR attr)
 119     {
 120         return (attr & _A_SUBDIR) != 0;
 121     }
 122
 123     static inline bool IsHidden(FIND_ATTR attr)
 124     {
 125         return (attr & (_A_SYSTEM | _A_HIDDEN)) != 0;
 126     }
 127 #else // Win32
 128     #include <windows.h>
 129
 130     typedef WIN32_FIND_DATA FIND_STRUCT;
 131     typedef HANDLE FIND_DATA;
 132     typedef DWORD FIND_ATTR;
 133
 134     static inline FIND_DATA InitFindData() { return INVALID_HANDLE_VALUE; }
 135
 136     static inline bool IsFindDataOk(FIND_DATA fd)
 137     {
 138         return fd != INVALID_HANDLE_VALUE;
 139     }
 140
 141     static inline void FreeFindData(FIND_DATA fd)
 142     {
 143         if ( !::FindClose(fd) )
 144         {
 145             wxLogLastError(_T("FindClose"));
 146         }
 147     }
 148
 149     static inline FIND_DATA FindFirst(const wxString& spec,
 150                                       FIND_STRUCT *finddata)
 151     {
 152         return ::FindFirstFile(filespec, &finddata);
 153     }
 154
 155     static inline bool FindNext(FIND_DATA fd, FIND_STRUCT *finddata)
 156     {
 157         return ::FindNextFile(fd, finddata) != 0;
 158     }
 159
 160     static const wxChar *GetNameFromFindData(FIND_STRUCT *finddata)
 161     {
 162         return finddata->cFileName;
 163     }
 164
 165     static const FIND_ATTR GetAttrFromFindData(FIND_STRUCT *finddata)
 166     {
 167         return finddata->dwFileAttributes;
 168     }
 169
 170     static inline bool IsDir(FIND_ATTR attr)
 171     {
 172         return (attr & FILE_ATTRIBUTE_DIRECTORY) != 0;
 173     }
 174
 175     static inline bool IsHidden(FIND_ATTR attr)
 176     {
 177         return (attr & (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM)) != 0;
 178     }
 179 #endif // __WIN16__
 180
 181 // ----------------------------------------------------------------------------
 182 // constants
 183 // ----------------------------------------------------------------------------
 184
 185 #ifndef MAX_PATH
 186     #define MAX_PATH 260        // from VC++ headers
 187 #endif
 188
 189 // ----------------------------------------------------------------------------
 190 // macros
 191 // ----------------------------------------------------------------------------
 192
 193 #define M_DIR       ((wxDirData *)m_data)
 194
 195 // ----------------------------------------------------------------------------
 196 // private classes
 197 // ----------------------------------------------------------------------------
 198
 199 // this class stores everything we need to enumerate the files
 200 class wxDirData
 201 {
 202 public:
 203     wxDirData(const wxString& dirname);
 204     ~wxDirData();
 205
 206     void SetFileSpec(const wxString& filespec) { m_filespec = filespec; }
 207     void SetFlags(int flags) { m_flags = flags; }
 208
 209     void Close();
 210     void Rewind();
 211     bool Read(wxString *filename);
 212
 213 private:
 214     FIND_DATA m_finddata;
 215
 216     wxString m_dirname;
 217     wxString m_filespec;
 218
 219     int      m_flags;
 220 };
 221
 222 // ============================================================================
 223 // implementation
 224 // ============================================================================
 225
 226 // ----------------------------------------------------------------------------
 227 // wxDirData
 228 // ----------------------------------------------------------------------------
 229
 230 wxDirData::wxDirData(const wxString& dirname)
 231          : m_dirname(dirname)
 232 {
 233     m_finddata = InitFindData();
 234 }
 235
 236 wxDirData::~wxDirData()
 237 {
 238     Close();
 239 }
 240
 241 void wxDirData::Close()
 242 {
 243     if ( IsFindDataOk(m_finddata) )
 244     {
 245         FreeFindData(m_finddata);
 246
 247         m_finddata = InitFindData();
 248     }
 249 }
 250
 251 void wxDirData::Rewind()
 252 {
 253     Close();
 254 }
 255
 256 bool wxDirData::Read(wxString *filename)
 257 {
 258     bool first = FALSE;
 259
 260 #ifdef __WIN32__
 261     WIN32_FIND_DATA finddata;
 262     #define PTR_TO_FINDDATA (&finddata)
 263 #else // Win16
 264     #define PTR_TO_FINDDATA (m_finddata)
 265 #endif
 266
 267     if ( !IsFindDataOk(m_finddata) )
 268     {
 269         // open first
 270         wxString filespec;
 271         filespec << m_dirname << _T('\\')
 272                  << (!m_filespec ? _T("*.*") : m_filespec.c_str());
 273
 274         m_finddata = FindFirst(filespec, PTR_TO_FINDDATA);
 275
 276         first = TRUE;
 277     }
 278
 279     if ( !IsFindDataOk(m_finddata) )
 280     {
 281 #ifdef __WIN32__
 282         DWORD err = ::GetLastError();
 283
 284         if ( err != ERROR_FILE_NOT_FOUND )
 285         {
 286             wxLogSysError(err, _("Can not enumerate files in directory '%s'"),
 287                           m_dirname.c_str());
 288         }
 289 #endif // __WIN32__
 290         //else: not an error, just no (such) files
 291
 292         return FALSE;
 293     }
 294
 295     const wxChar *name;
 296     FIND_ATTR attr;
 297
 298     for ( ;; )
 299     {
 300         if ( first )
 301         {
 302             first = FALSE;
 303         }
 304         else
 305         {
 306             if ( !FindNext(m_finddata, PTR_TO_FINDDATA) )
 307             {
 308 #ifdef __WIN32__
 309                 DWORD err = ::GetLastError();
 310
 311                 if ( err != ERROR_NO_MORE_FILES )
 312                 {
 313                     wxLogLastError(_T("FindNext"));
 314                 }
 315 #endif // __WIN32__
 316                 //else: not an error, just no more (such) files
 317
 318                 return FALSE;
 319             }
 320         }
 321
 322         name = GetNameFromFindData(PTR_TO_FINDDATA);
 323         attr = GetAttrFromFindData(PTR_TO_FINDDATA);
 324
 325         // don't return "." and ".." unless asked for
 326         if ( name[0] == _T('.') &&
 327              ((name[1] == _T('.') && name[2] == _T('\0')) ||
 328               (name[1] == _T('\0'))) )
 329         {
 330             if ( !(m_flags & wxDIR_DOTDOT) )
 331                 continue;
 332         }
 333
 334         // check the type now
 335         if ( !(m_flags & wxDIR_FILES) && !IsDir(attr) )
 336         {
 337             // it's a file, but we don't want them
 338             continue;
 339         }
 340         else if ( !(m_flags & wxDIR_DIRS) && IsDir(attr) )
 341         {
 342             // it's a dir, and we don't want it
 343             continue;
 344         }
 345
 346         // finally, check whether it's a hidden file
 347         if ( !(m_flags & wxDIR_HIDDEN) )
 348         {
 349             if ( IsHidden(attr) )
 350             {
 351                 // it's a hidden file, skip it
 352                 continue;
 353             }
 354         }
 355
 356         *filename = name;
 357
 358         break;
 359     }
 360
 361     return TRUE;
 362 }
 363
 364 // ----------------------------------------------------------------------------
 365 // wxDir helpers
 366 // ----------------------------------------------------------------------------
 367
 368 /* static */
 369 bool wxDir::Exists(const wxString& dir)
 370 {
 371     return wxPathExists(dir);
 372 }
 373
 374 // ----------------------------------------------------------------------------
 375 // wxDir construction/destruction
 376 // ----------------------------------------------------------------------------
 377
 378 wxDir::wxDir(const wxString& dirname)
 379 {
 380     m_data = NULL;
 381
 382     (void)Open(dirname);
 383 }
 384
 385 bool wxDir::Open(const wxString& dirname)
 386 {
 387     delete M_DIR;
 388     m_data = new wxDirData(dirname);
 389
 390     return TRUE;
 391 }
 392
 393 bool wxDir::IsOpened() const
 394 {
 395     return m_data != NULL;
 396 }
 397
 398 wxDir::~wxDir()
 399 {
 400     delete M_DIR;
 401 }
 402
 403 // ----------------------------------------------------------------------------
 404 // wxDir enumerating
 405 // ----------------------------------------------------------------------------
 406
 407 bool wxDir::GetFirst(wxString *filename,
 408                      const wxString& filespec,
 409                      int flags) const
 410 {
 411     wxCHECK_MSG( IsOpened(), FALSE, _T("must wxDir::Open() first") );
 412
 413     M_DIR->Rewind();
 414
 415     M_DIR->SetFileSpec(filespec);
 416     M_DIR->SetFlags(flags);
 417
 418     return GetNext(filename);
 419 }
 420
 421 bool wxDir::GetNext(wxString *filename) const
 422 {
 423     wxCHECK_MSG( IsOpened(), FALSE, _T("must wxDir::Open() first") );
 424
 425     wxCHECK_MSG( filename, FALSE, _T("bad pointer in wxDir::GetNext()") );
 426
 427     return M_DIR->Read(filename);
 428 }