src/common/filename.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/common/filename.cpp
   3 // Purpose:     wxFileName - encapsulates a file path
   4 // Author:      Robert Roebling, Vadim Zeitlin
   5 // Modified by:
   6 // Created:     28.12.2000
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2000 Robert Roebling
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  21     #pragma implementation "filename.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
  35
  36 #include "wx/filename.h"
  37 #include "wx/tokenzr.h"
  38 #include "wx/config.h"          // for wxExpandEnvVars
  39 #include "wx/utils.h"
  40
  41 // ============================================================================
  42 // implementation
  43 // ============================================================================
  44
  45 // ----------------------------------------------------------------------------
  46 // wxFileName construction
  47 // ----------------------------------------------------------------------------
  48
  49 void wxFileName::Assign( const wxFileName &filepath )
  50 {
  51     m_ext = filepath.GetExt();
  52     m_name = filepath.GetName();
  53     m_dirs = filepath.GetDirs();
  54 }
  55
  56 void wxFileName::Assign( const wxString& path,
  57                          const wxString& name,
  58                          const wxString& ext,
  59                          wxPathFormat format )
  60 {
  61     wxStringTokenizer tn(path, GetPathSeparators(format),
  62                          wxTOKEN_RET_EMPTY_ALL);
  63     bool first = TRUE;
  64     m_dirs.Clear();
  65     while ( tn.HasMoreTokens() )
  66     {
  67         wxString token = tn.GetNextToken();
  68
  69         // If the path starts with a slash, we need the first
  70         // dir entry to be an empty for later reassembly.
  71         if (first || !token.IsEmpty())
  72             m_dirs.Add( token );
  73
  74         first = FALSE;
  75     }
  76
  77     m_ext = ext;
  78     m_name = name;
  79 }
  80
  81 void wxFileName::Assign(const wxString& fullpath,
  82                         wxPathFormat format)
  83 {
  84     wxString path, name, ext;
  85     SplitPath(fullpath, &path, &name, &ext, format);
  86
  87     Assign(path, name, ext, format);
  88 }
  89
  90 void wxFileName::Assign(const wxString& path,
  91                         const wxString& fullname,
  92                         wxPathFormat format)
  93 {
  94     wxString name, ext;
  95     SplitPath(fullname, NULL /* no path */, &name, &ext, format);
  96
  97     Assign(path, name, ext, format);
  98 }
  99
 100 void wxFileName::Clear()
 101 {
 102     m_dirs.Clear();
 103     m_name =
 104     m_ext = wxEmptyString;
 105 }
 106
 107 /* static */
 108 wxFileName wxFileName::FileName(const wxString& file)
 109 {
 110     return wxFileName(file);
 111 }
 112
 113 /* static */
 114 wxFileName wxFileName::DirName(const wxString& dir)
 115 {
 116     wxFileName fn;
 117     fn.AssignDir(dir);
 118     return fn;
 119 }
 120
 121 // ----------------------------------------------------------------------------
 122 // existence tests
 123 // ----------------------------------------------------------------------------
 124
 125 bool wxFileName::FileExists()
 126 {
 127     return wxFileName::FileExists( GetFullPath() );
 128 }
 129
 130 bool wxFileName::FileExists( const wxString &file )
 131 {
 132     return ::wxFileExists( file );
 133 }
 134
 135 bool wxFileName::DirExists()
 136 {
 137     return wxFileName::DirExists( GetFullPath() );
 138 }
 139
 140 bool wxFileName::DirExists( const wxString &dir )
 141 {
 142     return ::wxDirExists( dir );
 143 }
 144
 145 // ----------------------------------------------------------------------------
 146 // CWD and HOME stuff
 147 // ----------------------------------------------------------------------------
 148
 149 void wxFileName::AssignCwd()
 150 {
 151     AssignDir(wxFileName::GetCwd());
 152 }
 153
 154 /* static */
 155 wxString wxFileName::GetCwd()
 156 {
 157     return ::wxGetCwd();
 158 }
 159
 160 bool wxFileName::SetCwd()
 161 {
 162     return wxFileName::SetCwd( GetFullPath() );
 163 }
 164
 165 bool wxFileName::SetCwd( const wxString &cwd )
 166 {
 167     return ::wxSetWorkingDirectory( cwd );
 168 }
 169
 170 void wxFileName::AssignHomeDir()
 171 {
 172     AssignDir(wxFileName::GetHomeDir());
 173 }
 174
 175 wxString wxFileName::GetHomeDir()
 176 {
 177     return ::wxGetHomeDir();
 178 }
 179
 180 void wxFileName::AssignTempFileName( const wxString &prefix )
 181 {
 182     wxString fullname;
 183     if ( wxGetTempFileName(prefix, fullname) )
 184     {
 185         Assign(fullname);
 186     }
 187     else // error
 188     {
 189         Clear();
 190     }
 191 }
 192
 193 // ----------------------------------------------------------------------------
 194 // directory operations
 195 // ----------------------------------------------------------------------------
 196
 197 bool wxFileName::Mkdir( int perm )
 198 {
 199     return wxFileName::Mkdir( GetFullPath(), perm );
 200 }
 201
 202 bool wxFileName::Mkdir( const wxString &dir, int perm )
 203 {
 204     return ::wxMkdir( dir, perm );
 205 }
 206
 207 bool wxFileName::Rmdir()
 208 {
 209     return wxFileName::Rmdir( GetFullPath() );
 210 }
 211
 212 bool wxFileName::Rmdir( const wxString &dir )
 213 {
 214     return ::wxRmdir( dir );
 215 }
 216
 217 // ----------------------------------------------------------------------------
 218 // path normalization
 219 // ----------------------------------------------------------------------------
 220
 221 bool wxFileName::Normalize(wxPathNormalize flags,
 222                            const wxString& cwd,
 223                            wxPathFormat format)
 224 {
 225     // the existing path components
 226     wxArrayString dirs = GetDirs();
 227
 228     // the path to prepend in front to make the path absolute
 229     wxFileName curDir;
 230
 231     format = GetFormat(format);
 232
 233     // make the path absolute
 234     if ( (flags & wxPATH_NORM_ABSOLUTE) && !IsAbsolute() )
 235     {
 236         if ( cwd.empty() )
 237             curDir.AssignCwd();
 238         else
 239             curDir.AssignDir(cwd);
 240     }
 241
 242     // handle ~ stuff under Unix only
 243     if ( (format == wxPATH_UNIX) && (flags & wxPATH_NORM_TILDE) )
 244     {
 245         if ( !dirs.IsEmpty() )
 246         {
 247             wxString dir = dirs[0u];
 248             if ( !dir.empty() && dir[0u] == _T('~') )
 249             {
 250                 curDir.AssignDir(wxGetUserHome(dir.c_str() + 1));
 251
 252                 dirs.RemoveAt(0u);
 253             }
 254         }
 255     }
 256
 257     if ( curDir.IsOk() )
 258     {
 259         wxArrayString dirsNew = curDir.GetDirs();
 260         size_t count = dirs.GetCount();
 261         for ( size_t n = 0; n < count; n++ )
 262         {
 263             dirsNew.Add(dirs[n]);
 264         }
 265
 266         dirs = dirsNew;
 267     }
 268
 269     // now deal with ".", ".." and the rest
 270     m_dirs.Empty();
 271     size_t count = dirs.GetCount();
 272     for ( size_t n = 0; n < count; n++ )
 273     {
 274         wxString dir = dirs[n];
 275
 276         if ( flags && wxPATH_NORM_DOTS )
 277         {
 278             if ( dir == wxT(".") )
 279             {
 280                 // just ignore
 281                 continue;
 282             }
 283
 284             if ( dir == wxT("..") )
 285             {
 286                 if ( m_dirs.IsEmpty() )
 287                 {
 288                     wxLogError(_("The path '%s' contains too many \"..\"!"),
 289                                GetFullPath().c_str());
 290                     return FALSE;
 291                 }
 292
 293                 m_dirs.Remove(m_dirs.GetCount() - 1);
 294                 continue;
 295             }
 296         }
 297
 298         if ( flags & wxPATH_NORM_ENV_VARS )
 299         {
 300             dir = wxExpandEnvVars(dir);
 301         }
 302
 303         if ( (flags & wxPATH_NORM_CASE) && !IsCaseSensitive(format) )
 304         {
 305             dir.MakeLower();
 306         }
 307
 308         m_dirs.Add(dir);
 309     }
 310
 311     if ( (flags & wxPATH_NORM_CASE) && !IsCaseSensitive(format) )
 312     {
 313         // VZ: expand env vars here too?
 314
 315         m_name.MakeLower();
 316         m_ext.MakeLower();
 317     }
 318
 319     return TRUE;
 320 }
 321
 322 // ----------------------------------------------------------------------------
 323 // filename kind tests
 324 // ----------------------------------------------------------------------------
 325
 326 bool wxFileName::SameAs( const wxFileName &filepath, wxPathFormat format)
 327 {
 328     wxFileName fn1 = *this,
 329                fn2 = filepath;
 330
 331     // get cwd only once - small time saving
 332     wxString cwd = wxGetCwd();
 333     fn1.Normalize(wxPATH_NORM_ALL, cwd, format);
 334     fn2.Normalize(wxPATH_NORM_ALL, cwd, format);
 335
 336     if ( fn1.GetFullPath() == fn2.GetFullPath() )
 337         return TRUE;
 338
 339     // TODO: compare inodes for Unix, this works even when filenames are
 340     //       different but files are the same (symlinks) (VZ)
 341
 342     return FALSE;
 343 }
 344
 345 /* static */
 346 bool wxFileName::IsCaseSensitive( wxPathFormat format )
 347 {
 348     // only DOS filenames are case-sensitive
 349     return GetFormat(format) != wxPATH_DOS;
 350 }
 351
 352 bool wxFileName::IsRelative( wxPathFormat format )
 353 {
 354     return !IsAbsolute(format);
 355 }
 356
 357 bool wxFileName::IsAbsolute( wxPathFormat format )
 358 {
 359     wxChar ch = m_dirs.IsEmpty() ? _T('\0') : m_dirs[0u][0u];
 360
 361     // the path is absolute if it starts with a path separator or, only for
 362     // Unix filenames, with "~" or "~user"
 363     return IsPathSeparator(ch, format) ||
 364            (GetFormat(format) == wxPATH_UNIX && ch == _T('~') );
 365 }
 366
 367 /* static */
 368 wxString wxFileName::GetPathSeparators(wxPathFormat format)
 369 {
 370     wxString seps;
 371     switch ( GetFormat(format) )
 372     {
 373         case wxPATH_DOS:
 374             // accept both as native APIs do
 375             seps << wxFILE_SEP_PATH_UNIX << wxFILE_SEP_PATH_DOS;
 376             break;
 377
 378         default:
 379             wxFAIL_MSG( _T("unknown wxPATH_XXX style") );
 380             // fall through
 381
 382         case wxPATH_UNIX:
 383             seps = wxFILE_SEP_PATH_UNIX;
 384             break;
 385
 386         case wxPATH_MAC:
 387             seps = wxFILE_SEP_PATH_MAC;
 388             break;
 389     }
 390
 391     return seps;
 392 }
 393
 394 /* static */
 395 bool wxFileName::IsPathSeparator(wxChar ch, wxPathFormat format)
 396 {
 397     return GetPathSeparators(format).Find(ch) != wxNOT_FOUND;
 398 }
 399
 400 bool wxFileName::IsWild( wxPathFormat format )
 401 {
 402     // FIXME: this is probably false for Mac and this is surely wrong for most
 403     //        of Unix shells (think about "[...]")
 404     return m_name.find_first_of(_T("*?")) != wxString::npos;
 405 }
 406
 407 // ----------------------------------------------------------------------------
 408 // path components manipulation
 409 // ----------------------------------------------------------------------------
 410
 411 void wxFileName::AppendDir( const wxString &dir )
 412 {
 413     m_dirs.Add( dir );
 414 }
 415
 416 void wxFileName::PrependDir( const wxString &dir )
 417 {
 418     m_dirs.Insert( dir, 0 );
 419 }
 420
 421 void wxFileName::InsertDir( int before, const wxString &dir )
 422 {
 423     m_dirs.Insert( dir, before );
 424 }
 425
 426 void wxFileName::RemoveDir( int pos )
 427 {
 428     m_dirs.Remove( (size_t)pos );
 429 }
 430
 431 // ----------------------------------------------------------------------------
 432 // accessors
 433 // ----------------------------------------------------------------------------
 434
 435 void wxFileName::SetFullName(const wxString& fullname)
 436 {
 437     SplitPath(fullname, NULL /* no path */, &m_name, &m_ext);
 438 }
 439
 440 wxString wxFileName::GetFullName() const
 441 {
 442     wxString fullname = m_name;
 443     if ( !m_ext.empty() )
 444     {
 445         fullname << wxFILE_SEP_EXT << m_ext;
 446     }
 447
 448     return fullname;
 449 }
 450
 451 wxString wxFileName::GetPath( bool add_separator, wxPathFormat format ) const
 452 {
 453     format = GetFormat( format );
 454
 455     wxString ret;
 456     size_t count = m_dirs.GetCount();
 457     for ( size_t i = 0; i < count; i++ )
 458     {
 459         ret += m_dirs[i];
 460         if ( add_separator || (i < count) )
 461             ret += wxFILE_SEP_PATH;
 462     }
 463
 464     return ret;
 465 }
 466
 467 wxString wxFileName::GetFullPath( wxPathFormat format ) const
 468 {
 469     return GetPathWithSep() + GetFullName();
 470 }
 471
 472 wxPathFormat wxFileName::GetFormat( wxPathFormat format )
 473 {
 474     if (format == wxPATH_NATIVE)
 475     {
 476 #if defined(__WXMSW__) || defined(__WXPM__)
 477         format = wxPATH_DOS;
 478 #elif defined(__WXMAC__)
 479         format = wxPATH_MAC;
 480 #else
 481         format = wxPATH_UNIX;
 482 #endif
 483     }
 484     return format;
 485 }
 486
 487 // ----------------------------------------------------------------------------
 488 // path splitting function
 489 // ----------------------------------------------------------------------------
 490
 491 void wxFileName::SplitPath(const wxString& fullpath,
 492                            wxString *pstrPath,
 493                            wxString *pstrName,
 494                            wxString *pstrExt,
 495                            wxPathFormat format)
 496 {
 497     format = GetFormat(format);
 498
 499     // find the positions of the last dot and last path separator in the path
 500     size_t posLastDot = fullpath.find_last_of(wxFILE_SEP_EXT);
 501     size_t posLastSlash = fullpath.find_last_of(GetPathSeparators(format));
 502
 503     if ( (posLastDot != wxString::npos) && (format == wxPATH_UNIX) )
 504     {
 505         if ( (posLastDot == 0) ||
 506              (fullpath[posLastDot - 1] == wxFILE_SEP_PATH_UNIX) )
 507         {
 508             // under Unix, dot may be (and commonly is) the first character of
 509             // the filename, don't treat the entire filename as extension in
 510             // this case
 511             posLastDot = wxString::npos;
 512         }
 513     }
 514
 515     if ( (posLastDot != wxString::npos) && (posLastDot < posLastSlash) )
 516     {
 517         // the dot is part of the path, not the start of the extension
 518         posLastDot = wxString::npos;
 519     }
 520
 521     // now fill in the variables provided by user
 522     if ( pstrPath )
 523     {
 524         if ( posLastSlash == wxString::npos )
 525         {
 526             // no path at all
 527             pstrPath->Empty();
 528         }
 529         else
 530         {
 531             // take all until the separator
 532             *pstrPath = fullpath.Left(posLastSlash);
 533         }
 534     }
 535
 536     if ( pstrName )
 537     {
 538         size_t nStart = posLastSlash == wxString::npos ? 0 : posLastSlash + 1;
 539         size_t count = posLastDot == wxString::npos ? wxString::npos
 540                                                     : posLastDot - posLastSlash;
 541
 542         *pstrName = fullpath.Mid(nStart, count);
 543     }
 544
 545     if ( pstrExt )
 546     {
 547         if ( posLastDot == wxString::npos )
 548         {
 549             // no extension
 550             pstrExt->Empty();
 551         }
 552         else
 553         {
 554             // take everything after the dot
 555             *pstrExt = fullpath.Mid(posLastDot + 1);
 556         }
 557     }
 558 }