src/unix/dir.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        unix/dir.cpp
   3 // Purpose:     wxDir implementation for Unix/POSIX systems
   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 wxMatchWild
  38
  39 #include <sys/types.h>
  40
  41 #include <dirent.h>
  42
  43 // ----------------------------------------------------------------------------
  44 // macros
  45 // ----------------------------------------------------------------------------
  46
  47 #define M_DIR       ((wxDirData *)m_data)
  48
  49 // ----------------------------------------------------------------------------
  50 // private classes
  51 // ----------------------------------------------------------------------------
  52
  53 // this class stores everything we need to enumerate the files
  54 class wxDirData
  55 {
  56 public:
  57     wxDirData(const wxString& dirname);
  58     ~wxDirData();
  59
  60     bool IsOk() const { return m_dir != NULL; }
  61
  62     void SetFileSpec(const wxString& filespec) { m_filespec = filespec; }
  63     void SetFlags(int flags) { m_flags = flags; }
  64
  65     void Rewind() { rewinddir(m_dir); }
  66     bool Read(wxString *filename);
  67
  68 private:
  69     DIR     *m_dir;
  70
  71     wxString m_dirname;
  72     wxString m_filespec;
  73
  74     int      m_flags;
  75 };
  76
  77 // ============================================================================
  78 // implementation
  79 // ============================================================================
  80
  81 // ----------------------------------------------------------------------------
  82 // wxDirData
  83 // ----------------------------------------------------------------------------
  84
  85 #if !defined( __VMS__ ) || ( __VMS_VER >= 70000000 )
  86
  87 wxDirData::wxDirData(const wxString& dirname)
  88          : m_dirname(dirname)
  89 {
  90     m_dir = NULL;
  91
  92     // throw away the trailing slashes
  93     size_t n = m_dirname.length();
  94     wxCHECK_RET( n, _T("empty dir name in wxDir") );
  95
  96     while ( n > 0 && m_dirname[--n] == '/' )
  97         ;
  98
  99     m_dirname.Truncate(n + 1);
 100
 101     // do open the dir
 102     m_dir = opendir(m_dirname.fn_str());
 103 }
 104
 105 wxDirData::~wxDirData()
 106 {
 107     if ( m_dir )
 108     {
 109         if ( closedir(m_dir) != 0 )
 110         {
 111             wxLogLastError(_T("closedir"));
 112         }
 113     }
 114 }
 115
 116 bool wxDirData::Read(wxString *filename)
 117 {
 118     dirent *de;
 119     bool matches = FALSE;
 120
 121     while ( !matches )
 122     {
 123         de = readdir(m_dir);
 124         if ( !de )
 125             return FALSE;
 126
 127         // don't return "." and ".." unless asked for
 128         if ( de->d_name[0] == '.' &&
 129              ((de->d_name[1] == '.' && de->d_name[2] == '\0') ||
 130               (de->d_name[1] == '\0')) )
 131         {
 132             if ( !(m_flags & wxDIR_DOTDOT) )
 133                 continue;
 134         }
 135
 136         // check the type now
 137         if ( !(m_flags & wxDIR_FILES) &&
 138              !wxDir::Exists(m_dirname + _T('/') + de->d_name) )
 139         {
 140             // it's a file, but we don't want them
 141             continue;
 142         }
 143         else if ( !(m_flags & wxDIR_DIRS) &&
 144                   wxDir::Exists(m_dirname + _T('/') + de->d_name) )
 145         {
 146             // it's a dir, and we don't want it
 147             continue;
 148         }
 149
 150         // finally, check the name
 151         if ( !m_filespec )
 152         {
 153             matches = m_flags & wxDIR_HIDDEN ? TRUE : de->d_name[0] != '.';
 154         }
 155         else
 156         {
 157             // test against the pattern
 158             matches = wxMatchWild(m_filespec, de->d_name,
 159                                   !(m_flags & wxDIR_HIDDEN));
 160         }
 161     }
 162
 163     *filename = de->d_name;
 164
 165     return TRUE;
 166 }
 167
 168 #else // old VMS (TODO)
 169
 170 wxDirData::wxDirData(const wxString& WXUNUSED(dirname))
 171 {
 172     wxFAIL_MSG(_T("not implemented"));
 173 }
 174
 175 wxDirData::~wxDirData()
 176 {
 177 }
 178
 179 bool wxDirData::Read(wxString * WXUNUSED(filename))
 180 {
 181     return FALSE;
 182 }
 183
 184 #endif // not or new VMS/old VMS
 185
 186 // ----------------------------------------------------------------------------
 187 // wxDir helpers
 188 // ----------------------------------------------------------------------------
 189
 190 /* static */
 191 bool wxDir::Exists(const wxString& dir)
 192 {
 193     return wxPathExists(dir);
 194 }
 195
 196 // ----------------------------------------------------------------------------
 197 // wxDir construction/destruction
 198 // ----------------------------------------------------------------------------
 199
 200 wxDir::wxDir(const wxString& dirname)
 201 {
 202     m_data = NULL;
 203
 204     (void)Open(dirname);
 205 }
 206
 207 bool wxDir::Open(const wxString& dirname)
 208 {
 209     delete M_DIR;
 210     m_data = new wxDirData(dirname);
 211
 212     if ( !M_DIR->IsOk() )
 213     {
 214         wxLogSysError(_("Can not enumerate files in directory '%s'"),
 215                       dirname.c_str());
 216
 217         delete M_DIR;
 218         m_data = NULL;
 219
 220         return FALSE;
 221     }
 222
 223     return TRUE;
 224 }
 225
 226 bool wxDir::IsOpened() const
 227 {
 228     return m_data != NULL;
 229 }
 230
 231 wxDir::~wxDir()
 232 {
 233     delete M_DIR;
 234 }
 235
 236 // ----------------------------------------------------------------------------
 237 // wxDir enumerating
 238 // ----------------------------------------------------------------------------
 239
 240 bool wxDir::GetFirst(wxString *filename,
 241                      const wxString& filespec,
 242                      int flags) const
 243 {
 244     wxCHECK_MSG( IsOpened(), FALSE, _T("must wxDir::Open() first") );
 245
 246     M_DIR->Rewind();
 247
 248     M_DIR->SetFileSpec(filespec);
 249     M_DIR->SetFlags(flags);
 250
 251     return GetNext(filename);
 252 }
 253
 254 bool wxDir::GetNext(wxString *filename) const
 255 {
 256     wxCHECK_MSG( IsOpened(), FALSE, _T("must wxDir::Open() first") );
 257
 258     wxCHECK_MSG( filename, FALSE, _T("bad pointer in wxDir::GetNext()") );
 259
 260     return M_DIR->Read(filename);
 261 }