src/common/cmdline.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        common/cmdline.cpp
   3 // Purpose:     wxCmdLineParser implementation
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     05.01.00
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2000 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
   9 // Licence:     wxWindows licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  21     #pragma implementation "cmdline.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 #include "wx/cmdline.h"
  32
  33 #if wxUSE_CMDLINE_PARSER
  34
  35 #ifndef WX_PRECOMP
  36     #include "wx/string.h"
  37     #include "wx/log.h"
  38     #include "wx/intl.h"
  39     #include "wx/app.h"
  40     #include "wx/dynarray.h"
  41     #include "wx/filefn.h"
  42 #endif //WX_PRECOMP
  43
  44 #include <ctype.h>
  45
  46 #include "wx/datetime.h"
  47 #include "wx/msgout.h"
  48
  49 // ----------------------------------------------------------------------------
  50 // private functions
  51 // ----------------------------------------------------------------------------
  52
  53 static wxString GetTypeName(wxCmdLineParamType type);
  54
  55 static wxString GetOptionName(const wxChar *p, const wxChar *allowedChars);
  56
  57 static wxString GetShortOptionName(const wxChar *p);
  58
  59 static wxString GetLongOptionName(const wxChar *p);
  60
  61 // ----------------------------------------------------------------------------
  62 // private structs
  63 // ----------------------------------------------------------------------------
  64
  65 // an internal representation of an option
  66 struct wxCmdLineOption
  67 {
  68     wxCmdLineOption(wxCmdLineEntryType k,
  69                     const wxString& shrt,
  70                     const wxString& lng,
  71                     const wxString& desc,
  72                     wxCmdLineParamType typ,
  73                     int fl)
  74     {
  75         wxASSERT_MSG( !shrt.empty() || !lng.empty(),
  76                       _T("option should have at least one name") );
  77
  78         wxASSERT_MSG
  79             (
  80                 GetShortOptionName(shrt).Len() == shrt.Len(),
  81                 wxT("Short option contains invalid characters")
  82             );
  83
  84         wxASSERT_MSG
  85             (
  86                 GetLongOptionName(lng).Len() == lng.Len(),
  87                 wxT("Long option contains invalid characters")
  88             );
  89
  90
  91         kind = k;
  92
  93         shortName = shrt;
  94         longName = lng;
  95         description = desc;
  96
  97         type = typ;
  98         flags = fl;
  99
 100         m_hasVal = FALSE;
 101     }
 102
 103     // can't use union easily here, so just store all possible data fields, we
 104     // don't waste much (might still use union later if the number of supported
 105     // types increases, so always use the accessor functions and don't access
 106     // the fields directly!)
 107
 108     void Check(wxCmdLineParamType WXUNUSED_UNLESS_DEBUG(typ)) const
 109     {
 110         wxASSERT_MSG( type == typ, _T("type mismatch in wxCmdLineOption") );
 111     }
 112
 113     long GetLongVal() const
 114         { Check(wxCMD_LINE_VAL_NUMBER); return m_longVal; }
 115     const wxString& GetStrVal() const
 116         { Check(wxCMD_LINE_VAL_STRING); return m_strVal;  }
 117 #if wxUSE_DATETIME
 118     const wxDateTime& GetDateVal() const
 119         { Check(wxCMD_LINE_VAL_DATE);   return m_dateVal; }
 120 #endif // wxUSE_DATETIME
 121
 122     void SetLongVal(long val)
 123         { Check(wxCMD_LINE_VAL_NUMBER); m_longVal = val; m_hasVal = TRUE; }
 124     void SetStrVal(const wxString& val)
 125         { Check(wxCMD_LINE_VAL_STRING); m_strVal = val; m_hasVal = TRUE; }
 126 #if wxUSE_DATETIME
 127     void SetDateVal(const wxDateTime val)
 128         { Check(wxCMD_LINE_VAL_DATE); m_dateVal = val; m_hasVal = TRUE; }
 129 #endif // wxUSE_DATETIME
 130
 131     void SetHasValue(bool hasValue = TRUE) { m_hasVal = hasValue; }
 132     bool HasValue() const { return m_hasVal; }
 133
 134 public:
 135     wxCmdLineEntryType kind;
 136     wxString shortName,
 137              longName,
 138              description;
 139     wxCmdLineParamType type;
 140     int flags;
 141
 142 private:
 143     bool m_hasVal;
 144
 145     long m_longVal;
 146     wxString m_strVal;
 147 #if wxUSE_DATETIME
 148     wxDateTime m_dateVal;
 149 #endif // wxUSE_DATETIME
 150 };
 151
 152 struct wxCmdLineParam
 153 {
 154     wxCmdLineParam(const wxString& desc,
 155                    wxCmdLineParamType typ,
 156                    int fl)
 157         : description(desc)
 158     {
 159         type = typ;
 160         flags = fl;
 161     }
 162
 163     wxString description;
 164     wxCmdLineParamType type;
 165     int flags;
 166 };
 167
 168 WX_DECLARE_OBJARRAY(wxCmdLineOption, wxArrayOptions);
 169 WX_DECLARE_OBJARRAY(wxCmdLineParam, wxArrayParams);
 170
 171 #include "wx/arrimpl.cpp"
 172
 173 WX_DEFINE_OBJARRAY(wxArrayOptions);
 174 WX_DEFINE_OBJARRAY(wxArrayParams);
 175
 176 // the parser internal state
 177 struct wxCmdLineParserData
 178 {
 179     // options
 180     wxString m_switchChars;     // characters which may start an option
 181     bool m_enableLongOptions;   // TRUE if long options are enabled
 182     wxString m_logo;            // some extra text to show in Usage()
 183
 184     // cmd line data
 185     wxArrayString m_arguments;  // == argv, argc == m_arguments.GetCount()
 186     wxArrayOptions m_options;   // all possible options and switchrs
 187     wxArrayParams m_paramDesc;  // description of all possible params
 188     wxArrayString m_parameters; // all params found
 189
 190     // methods
 191     wxCmdLineParserData();
 192     void SetArguments(int argc, wxChar **argv);
 193     void SetArguments(const wxString& cmdline);
 194
 195     int FindOption(const wxString& name);
 196     int FindOptionByLongName(const wxString& name);
 197 };
 198
 199 // ============================================================================
 200 // implementation
 201 // ============================================================================
 202
 203 // ----------------------------------------------------------------------------
 204 // wxCmdLineParserData
 205 // ----------------------------------------------------------------------------
 206
 207 wxCmdLineParserData::wxCmdLineParserData()
 208 {
 209     m_enableLongOptions = TRUE;
 210 #ifdef __UNIX_LIKE__
 211     m_switchChars = _T("-");
 212 #else // !Unix
 213     m_switchChars = _T("/-");
 214 #endif
 215 }
 216
 217 void wxCmdLineParserData::SetArguments(int argc, wxChar **argv)
 218 {
 219     m_arguments.Empty();
 220
 221     for ( int n = 0; n < argc; n++ )
 222     {
 223         m_arguments.Add(argv[n]);
 224     }
 225 }
 226
 227 void wxCmdLineParserData::SetArguments(const wxString& cmdLine)
 228 {
 229     m_arguments.Empty();
 230
 231     m_arguments.Add(wxTheApp->GetAppName());
 232
 233     wxArrayString args = wxCmdLineParser::ConvertStringToArgs(cmdLine);
 234
 235     WX_APPEND_ARRAY(m_arguments, args);
 236 }
 237
 238 int wxCmdLineParserData::FindOption(const wxString& name)
 239 {
 240     if ( !name.empty() )
 241     {
 242         size_t count = m_options.GetCount();
 243         for ( size_t n = 0; n < count; n++ )
 244         {
 245             if ( m_options[n].shortName == name )
 246             {
 247                 // found
 248                 return n;
 249             }
 250         }
 251     }
 252
 253     return wxNOT_FOUND;
 254 }
 255
 256 int wxCmdLineParserData::FindOptionByLongName(const wxString& name)
 257 {
 258     size_t count = m_options.GetCount();
 259     for ( size_t n = 0; n < count; n++ )
 260     {
 261         if ( m_options[n].longName == name )
 262         {
 263             // found
 264             return n;
 265         }
 266     }
 267
 268     return wxNOT_FOUND;
 269 }
 270
 271 // ----------------------------------------------------------------------------
 272 // construction and destruction
 273 // ----------------------------------------------------------------------------
 274
 275 void wxCmdLineParser::Init()
 276 {
 277     m_data = new wxCmdLineParserData;
 278 }
 279
 280 void wxCmdLineParser::SetCmdLine(int argc, wxChar **argv)
 281 {
 282     m_data->SetArguments(argc, argv);
 283 }
 284
 285 void wxCmdLineParser::SetCmdLine(const wxString& cmdline)
 286 {
 287     m_data->SetArguments(cmdline);
 288 }
 289
 290 wxCmdLineParser::~wxCmdLineParser()
 291 {
 292     delete m_data;
 293 }
 294
 295 // ----------------------------------------------------------------------------
 296 // options
 297 // ----------------------------------------------------------------------------
 298
 299 void wxCmdLineParser::SetSwitchChars(const wxString& switchChars)
 300 {
 301     m_data->m_switchChars = switchChars;
 302 }
 303
 304 void wxCmdLineParser::EnableLongOptions(bool enable)
 305 {
 306     m_data->m_enableLongOptions = enable;
 307 }
 308
 309 bool wxCmdLineParser::AreLongOptionsEnabled()
 310 {
 311     return m_data->m_enableLongOptions;
 312 }
 313
 314 void wxCmdLineParser::SetLogo(const wxString& logo)
 315 {
 316     m_data->m_logo = logo;
 317 }
 318
 319 // ----------------------------------------------------------------------------
 320 // command line construction
 321 // ----------------------------------------------------------------------------
 322
 323 void wxCmdLineParser::SetDesc(const wxCmdLineEntryDesc *desc)
 324 {
 325     for ( ;; desc++ )
 326     {
 327         switch ( desc->kind )
 328         {
 329             case wxCMD_LINE_SWITCH:
 330                 AddSwitch(desc->shortName, desc->longName, desc->description,
 331                           desc->flags);
 332                 break;
 333
 334             case wxCMD_LINE_OPTION:
 335                 AddOption(desc->shortName, desc->longName, desc->description,
 336                           desc->type, desc->flags);
 337                 break;
 338
 339             case wxCMD_LINE_PARAM:
 340                 AddParam(desc->description, desc->type, desc->flags);
 341                 break;
 342
 343             default:
 344                 wxFAIL_MSG( _T("unknown command line entry type") );
 345                 // still fall through
 346
 347             case wxCMD_LINE_NONE:
 348                 return;
 349         }
 350     }
 351 }
 352
 353 void wxCmdLineParser::AddSwitch(const wxString& shortName,
 354                                 const wxString& longName,
 355                                 const wxString& desc,
 356                                 int flags)
 357 {
 358     wxASSERT_MSG( m_data->FindOption(shortName) == wxNOT_FOUND,
 359                   _T("duplicate switch") );
 360
 361     wxCmdLineOption *option = new wxCmdLineOption(wxCMD_LINE_SWITCH,
 362                                                   shortName, longName, desc,
 363                                                   wxCMD_LINE_VAL_NONE, flags);
 364
 365     m_data->m_options.Add(option);
 366 }
 367
 368 void wxCmdLineParser::AddOption(const wxString& shortName,
 369                                 const wxString& longName,
 370                                 const wxString& desc,
 371                                 wxCmdLineParamType type,
 372                                 int flags)
 373 {
 374     wxASSERT_MSG( m_data->FindOption(shortName) == wxNOT_FOUND,
 375                   _T("duplicate option") );
 376
 377     wxCmdLineOption *option = new wxCmdLineOption(wxCMD_LINE_OPTION,
 378                                                   shortName, longName, desc,
 379                                                   type, flags);
 380
 381     m_data->m_options.Add(option);
 382 }
 383
 384 void wxCmdLineParser::AddParam(const wxString& desc,
 385                                wxCmdLineParamType type,
 386                                int flags)
 387 {
 388     // do some consistency checks: a required parameter can't follow an
 389     // optional one and nothing should follow a parameter with MULTIPLE flag
 390 #ifdef __WXDEBUG__
 391     if ( !m_data->m_paramDesc.IsEmpty() )
 392     {
 393         wxCmdLineParam& param = m_data->m_paramDesc.Last();
 394
 395         wxASSERT_MSG( !(param.flags & wxCMD_LINE_PARAM_MULTIPLE),
 396                       _T("all parameters after the one with wxCMD_LINE_PARAM_MULTIPLE style will be ignored") );
 397
 398         if ( !(flags & wxCMD_LINE_PARAM_OPTIONAL) )
 399         {
 400             wxASSERT_MSG( !(param.flags & wxCMD_LINE_PARAM_OPTIONAL),
 401                           _T("a required parameter can't follow an optional one") );
 402         }
 403     }
 404 #endif // Debug
 405
 406     wxCmdLineParam *param = new wxCmdLineParam(desc, type, flags);
 407
 408     m_data->m_paramDesc.Add(param);
 409 }
 410
 411 // ----------------------------------------------------------------------------
 412 // access to parse command line
 413 // ----------------------------------------------------------------------------
 414
 415 bool wxCmdLineParser::Found(const wxString& name) const
 416 {
 417     int i = m_data->FindOption(name);
 418     if ( i == wxNOT_FOUND )
 419         i = m_data->FindOptionByLongName(name);
 420
 421     wxCHECK_MSG( i != wxNOT_FOUND, FALSE, _T("unknown switch") );
 422
 423     wxCmdLineOption& opt = m_data->m_options[(size_t)i];
 424     if ( !opt.HasValue() )
 425         return FALSE;
 426
 427     return TRUE;
 428 }
 429
 430 bool wxCmdLineParser::Found(const wxString& name, wxString *value) const
 431 {
 432     int i = m_data->FindOption(name);
 433     if ( i == wxNOT_FOUND )
 434         i = m_data->FindOptionByLongName(name);
 435
 436     wxCHECK_MSG( i != wxNOT_FOUND, FALSE, _T("unknown option") );
 437
 438     wxCmdLineOption& opt = m_data->m_options[(size_t)i];
 439     if ( !opt.HasValue() )
 440         return FALSE;
 441
 442     wxCHECK_MSG( value, FALSE, _T("NULL pointer in wxCmdLineOption::Found") );
 443
 444     *value = opt.GetStrVal();
 445
 446     return TRUE;
 447 }
 448
 449 bool wxCmdLineParser::Found(const wxString& name, long *value) const
 450 {
 451     int i = m_data->FindOption(name);
 452     if ( i == wxNOT_FOUND )
 453         i = m_data->FindOptionByLongName(name);
 454
 455     wxCHECK_MSG( i != wxNOT_FOUND, FALSE, _T("unknown option") );
 456
 457     wxCmdLineOption& opt = m_data->m_options[(size_t)i];
 458     if ( !opt.HasValue() )
 459         return FALSE;
 460
 461     wxCHECK_MSG( value, FALSE, _T("NULL pointer in wxCmdLineOption::Found") );
 462
 463     *value = opt.GetLongVal();
 464
 465     return TRUE;
 466 }
 467
 468 #if wxUSE_DATETIME
 469 bool wxCmdLineParser::Found(const wxString& name, wxDateTime *value) const
 470 {
 471     int i = m_data->FindOption(name);
 472     if ( i == wxNOT_FOUND )
 473         i = m_data->FindOptionByLongName(name);
 474
 475     wxCHECK_MSG( i != wxNOT_FOUND, FALSE, _T("unknown option") );
 476
 477     wxCmdLineOption& opt = m_data->m_options[(size_t)i];
 478     if ( !opt.HasValue() )
 479         return FALSE;
 480
 481     wxCHECK_MSG( value, FALSE, _T("NULL pointer in wxCmdLineOption::Found") );
 482
 483     *value = opt.GetDateVal();
 484
 485     return TRUE;
 486 }
 487 #endif // wxUSE_DATETIME
 488
 489 size_t wxCmdLineParser::GetParamCount() const
 490 {
 491     return m_data->m_parameters.GetCount();
 492 }
 493
 494 wxString wxCmdLineParser::GetParam(size_t n) const
 495 {
 496     wxCHECK_MSG( n < GetParamCount(), wxEmptyString, _T("invalid param index") );
 497
 498     return m_data->m_parameters[n];
 499 }
 500
 501 // Resets switches and options
 502 void wxCmdLineParser::Reset()
 503 {
 504     for ( size_t i = 0; i < m_data->m_options.Count(); i++ )
 505     {
 506         wxCmdLineOption& opt = m_data->m_options[i];
 507         opt.SetHasValue(FALSE);
 508     }
 509 }
 510
 511
 512 // ----------------------------------------------------------------------------
 513 // the real work is done here
 514 // ----------------------------------------------------------------------------
 515
 516 int wxCmdLineParser::Parse(bool showUsage)
 517 {
 518     bool maybeOption = TRUE;    // can the following arg be an option?
 519     bool ok = TRUE;             // TRUE until an error is detected
 520     bool helpRequested = FALSE; // TRUE if "-h" was given
 521     bool hadRepeatableParam = FALSE; // TRUE if found param with MULTIPLE flag
 522
 523     size_t currentParam = 0;    // the index in m_paramDesc
 524
 525     size_t countParam = m_data->m_paramDesc.GetCount();
 526     wxString errorMsg;
 527
 528     Reset();
 529
 530     // parse everything
 531     wxString arg;
 532     size_t count = m_data->m_arguments.GetCount();
 533     for ( size_t n = 1; ok && (n < count); n++ )    // 0 is program name
 534     {
 535         arg = m_data->m_arguments[n];
 536
 537         // special case: "--" should be discarded and all following arguments
 538         // should be considered as parameters, even if they start with '-' and
 539         // not like options (this is POSIX-like)
 540         if ( arg == _T("--") )
 541         {
 542             maybeOption = FALSE;
 543
 544             continue;
 545         }
 546
 547         // empty argument or just '-' is not an option but a parameter
 548         if ( maybeOption && arg.length() > 1 &&
 549                 wxStrchr(m_data->m_switchChars, arg[0u]) )
 550         {
 551             bool isLong;
 552             wxString name;
 553             int optInd = wxNOT_FOUND;   // init to suppress warnings
 554
 555             // an option or a switch: find whether it's a long or a short one
 556             if ( arg[0u] == _T('-') && arg[1u] == _T('-') )
 557             {
 558                 // a long one
 559                 isLong = TRUE;
 560
 561                 // Skip leading "--"
 562                 const wxChar *p = arg.c_str() + 2;
 563
 564                 bool longOptionsEnabled = AreLongOptionsEnabled();
 565
 566                 name = GetLongOptionName(p);
 567
 568                 if (longOptionsEnabled)
 569                 {
 570                     optInd = m_data->FindOptionByLongName(name);
 571                     if ( optInd == wxNOT_FOUND )
 572                     {
 573                         errorMsg << wxString::Format(_("Unknown long option '%s'"), name.c_str()) << wxT("\n");
 574                     }
 575                 }
 576                 else
 577                 {
 578                     optInd = wxNOT_FOUND; // Sanity check
 579
 580                     // Print the argument including leading "--"
 581                     name.Prepend( wxT("--") );
 582                     errorMsg << wxString::Format(_("Unknown option '%s'"), name.c_str()) << wxT("\n");
 583                 }
 584
 585             }
 586             else
 587             {
 588                 isLong = FALSE;
 589
 590                 // a short one: as they can be cumulated, we try to find the
 591                 // longest substring which is a valid option
 592                 const wxChar *p = arg.c_str() + 1;
 593
 594                 name = GetShortOptionName(p);
 595
 596                 size_t len = name.length();
 597                 do
 598                 {
 599                     if ( len == 0 )
 600                     {
 601                         // we couldn't find a valid option name in the
 602                         // beginning of this string
 603                         errorMsg << wxString::Format(_("Unknown option '%s'"), name.c_str()) << wxT("\n");
 604
 605                         break;
 606                     }
 607                     else
 608                     {
 609                         optInd = m_data->FindOption(name.Left(len));
 610
 611                         // will try with one character less the next time
 612                         len--;
 613                     }
 614                 }
 615                 while ( optInd == wxNOT_FOUND );
 616
 617                 len++;  // compensates extra len-- above
 618                 if ( (optInd != wxNOT_FOUND) && (len != name.length()) )
 619                 {
 620                     // first of all, the option name is only part of this
 621                     // string
 622                     name = name.Left(len);
 623
 624                     // our option is only part of this argument, there is
 625                     // something else in it - it is either the value of this
 626                     // option or other switches if it is a switch
 627                     if ( m_data->m_options[(size_t)optInd].kind
 628                             == wxCMD_LINE_SWITCH )
 629                     {
 630                         // pretend that all the rest of the argument is the
 631                         // next argument, in fact
 632                         wxString arg2 = arg[0u];
 633                         arg2 += arg.Mid(len + 1); // +1 for leading '-'
 634
 635                         m_data->m_arguments.Insert(arg2, n + 1);
 636                         count++;
 637                     }
 638                     //else: it's our value, we'll deal with it below
 639                 }
 640             }
 641
 642             if ( optInd == wxNOT_FOUND )
 643             {
 644                 ok = FALSE;
 645
 646                 continue;   // will break, in fact
 647             }
 648
 649             wxCmdLineOption& opt = m_data->m_options[(size_t)optInd];
 650             if ( opt.kind == wxCMD_LINE_SWITCH )
 651             {
 652                 // nothing more to do
 653                 opt.SetHasValue();
 654
 655                 if ( opt.flags & wxCMD_LINE_OPTION_HELP )
 656                 {
 657                     helpRequested = TRUE;
 658
 659                     // it's not an error, but we still stop here
 660                     ok = FALSE;
 661                 }
 662             }
 663             else
 664             {
 665                 // get the value
 666
 667                 // +1 for leading '-'
 668                 const wxChar *p = arg.c_str() + 1 + name.length();
 669                 if ( isLong )
 670                 {
 671                     p++;    // for another leading '-'
 672
 673                     if ( *p++ != _T('=') )
 674                     {
 675                         errorMsg << wxString::Format(_("Option '%s' requires a value, '=' expected."), name.c_str()) << wxT("\n");
 676
 677                         ok = FALSE;
 678                     }
 679                 }
 680                 else
 681                 {
 682                     switch ( *p )
 683                     {
 684                         case _T('='):
 685                         case _T(':'):
 686                             // the value follows
 687                             p++;
 688                             break;
 689
 690                         case 0:
 691                             // the value is in the next argument
 692                             if ( ++n == count )
 693                             {
 694                                 // ... but there is none
 695                                 errorMsg << wxString::Format(_("Option '%s' requires a value."),
 696                                                              name.c_str()) << wxT("\n");
 697
 698                                 ok = FALSE;
 699                             }
 700                             else
 701                             {
 702                                 // ... take it from there
 703                                 p = m_data->m_arguments[n].c_str();
 704                             }
 705                             break;
 706
 707                         default:
 708                             // the value is right here: this may be legal or
 709                             // not depending on the option style
 710                             if ( opt.flags & wxCMD_LINE_NEEDS_SEPARATOR )
 711                             {
 712                                 errorMsg << wxString::Format(_("Separator expected after the option '%s'."),
 713                                                              name.c_str()) << wxT("\n");
 714
 715                                 ok = FALSE;
 716                             }
 717                     }
 718                 }
 719
 720                 if ( ok )
 721                 {
 722                     wxString value = p;
 723                     switch ( opt.type )
 724                     {
 725                         default:
 726                             wxFAIL_MSG( _T("unknown option type") );
 727                             // still fall through
 728
 729                         case wxCMD_LINE_VAL_STRING:
 730                             opt.SetStrVal(value);
 731                             break;
 732
 733                         case wxCMD_LINE_VAL_NUMBER:
 734                             {
 735                                 long val;
 736                                 if ( value.ToLong(&val) )
 737                                 {
 738                                     opt.SetLongVal(val);
 739                                 }
 740                                 else
 741                                 {
 742                                     errorMsg << wxString::Format(_("'%s' is not a correct numeric value for option '%s'."),
 743                                                                  value.c_str(), name.c_str()) << wxT("\n");
 744
 745                                     ok = FALSE;
 746                                 }
 747                             }
 748                             break;
 749
 750 #if wxUSE_DATETIME
 751                         case wxCMD_LINE_VAL_DATE:
 752                             {
 753                                 wxDateTime dt;
 754                                 const wxChar *res = dt.ParseDate(value);
 755                                 if ( !res || *res )
 756                                 {
 757                                     errorMsg << wxString::Format(_("Option '%s': '%s' cannot be converted to a date."),
 758                                                                  name.c_str(), value.c_str()) << wxT("\n");
 759
 760                                     ok = FALSE;
 761                                 }
 762                                 else
 763                                 {
 764                                     opt.SetDateVal(dt);
 765                                 }
 766                             }
 767                             break;
 768 #endif // wxUSE_DATETIME
 769                     }
 770                 }
 771             }
 772         }
 773         else
 774         {
 775             // a parameter
 776             if ( currentParam < countParam )
 777             {
 778                 wxCmdLineParam& param = m_data->m_paramDesc[currentParam];
 779
 780                 // TODO check the param type
 781
 782                 m_data->m_parameters.Add(arg);
 783
 784                 if ( !(param.flags & wxCMD_LINE_PARAM_MULTIPLE) )
 785                 {
 786                     currentParam++;
 787                 }
 788                 else
 789                 {
 790                     wxASSERT_MSG( currentParam == countParam - 1,
 791                                   _T("all parameters after the one with wxCMD_LINE_PARAM_MULTIPLE style are ignored") );
 792
 793                     // remember that we did have this last repeatable parameter
 794                     hadRepeatableParam = TRUE;
 795                 }
 796             }
 797             else
 798             {
 799                 errorMsg << wxString::Format(_("Unexpected parameter '%s'"), arg.c_str()) << wxT("\n");
 800
 801                 ok = FALSE;
 802             }
 803         }
 804     }
 805
 806     // verify that all mandatory options were given
 807     if ( ok )
 808     {
 809         size_t countOpt = m_data->m_options.GetCount();
 810         for ( size_t n = 0; ok && (n < countOpt); n++ )
 811         {
 812             wxCmdLineOption& opt = m_data->m_options[n];
 813             if ( (opt.flags & wxCMD_LINE_OPTION_MANDATORY) && !opt.HasValue() )
 814             {
 815                 wxString optName;
 816                 if ( !opt.longName )
 817                 {
 818                     optName = opt.shortName;
 819                 }
 820                 else
 821                 {
 822                     if ( AreLongOptionsEnabled() )
 823                     {
 824                         optName.Printf( _("%s (or %s)"),
 825                                         opt.shortName.c_str(),
 826                                         opt.longName.c_str() );
 827                     }
 828                     else
 829                     {
 830                         optName.Printf( wxT("%s"),
 831                                         opt.shortName.c_str() );
 832                     }
 833                 }
 834
 835                 errorMsg << wxString::Format(_("The value for the option '%s' must be specified."),
 836                                              optName.c_str()) << wxT("\n");
 837
 838                 ok = FALSE;
 839             }
 840         }
 841
 842         for ( ; ok && (currentParam < countParam); currentParam++ )
 843         {
 844             wxCmdLineParam& param = m_data->m_paramDesc[currentParam];
 845             if ( (currentParam == countParam - 1) &&
 846                  (param.flags & wxCMD_LINE_PARAM_MULTIPLE) &&
 847                  hadRepeatableParam )
 848             {
 849                 // special case: currentParam wasn't incremented, but we did
 850                 // have it, so don't give error
 851                 continue;
 852             }
 853
 854             if ( !(param.flags & wxCMD_LINE_PARAM_OPTIONAL) )
 855             {
 856                 errorMsg << wxString::Format(_("The required parameter '%s' was not specified."),
 857                                              param.description.c_str()) << wxT("\n");
 858
 859                 ok = FALSE;
 860             }
 861         }
 862     }
 863
 864     // if there was an error during parsing the command line, show this error
 865     // and also the usage message if it had been requested
 866     if ( !ok && (!errorMsg.empty() || (helpRequested && showUsage)) )
 867     {
 868         wxMessageOutput* msgOut = wxMessageOutput::Get();
 869         if ( msgOut )
 870         {
 871             wxString usage;
 872             if ( showUsage )
 873                 usage = GetUsageString();
 874
 875             msgOut->Printf( wxT("%s%s"), usage.c_str(), errorMsg.c_str() );
 876         }
 877         else
 878         {
 879             wxFAIL_MSG( _T("no wxMessageOutput object?") );
 880         }
 881     }
 882
 883     return ok ? 0 : helpRequested ? -1 : 1;
 884 }
 885
 886 // ----------------------------------------------------------------------------
 887 // give the usage message
 888 // ----------------------------------------------------------------------------
 889
 890 void wxCmdLineParser::Usage()
 891 {
 892     wxMessageOutput* msgOut = wxMessageOutput::Get();
 893     if ( msgOut )
 894     {
 895         msgOut->Printf( wxT("%s"), GetUsageString().c_str() );
 896     }
 897     else
 898     {
 899         wxFAIL_MSG( _T("no wxMessageOutput object?") );
 900     }
 901 }
 902
 903 wxString wxCmdLineParser::GetUsageString()
 904 {
 905     wxString appname = wxTheApp->GetAppName();
 906     if ( !appname )
 907     {
 908         wxCHECK_MSG( !m_data->m_arguments.IsEmpty(), wxEmptyString,
 909                      _T("no program name") );
 910
 911         appname = wxFileNameFromPath(m_data->m_arguments[0]);
 912         wxStripExtension(appname);
 913     }
 914
 915     // we construct the brief cmd line desc on the fly, but not the detailed
 916     // help message below because we want to align the options descriptions
 917     // and for this we must first know the longest one of them
 918     wxString usage;
 919     wxArrayString namesOptions, descOptions;
 920
 921     if ( !m_data->m_logo.empty() )
 922     {
 923         usage << m_data->m_logo << _T('\n');
 924     }
 925
 926     usage << wxString::Format(_("Usage: %s"), appname.c_str());
 927
 928     // the switch char is usually '-' but this can be changed with
 929     // SetSwitchChars() and then the first one of possible chars is used
 930     wxChar chSwitch = !m_data->m_switchChars ? _T('-')
 931                                              : m_data->m_switchChars[0u];
 932
 933     bool areLongOptionsEnabled = AreLongOptionsEnabled();
 934     size_t n, count = m_data->m_options.GetCount();
 935     for ( n = 0; n < count; n++ )
 936     {
 937         wxCmdLineOption& opt = m_data->m_options[n];
 938
 939         usage << _T(' ');
 940         if ( !(opt.flags & wxCMD_LINE_OPTION_MANDATORY) )
 941         {
 942             usage << _T('[');
 943         }
 944
 945         if ( !opt.shortName.empty() )
 946         {
 947             usage << chSwitch << opt.shortName;
 948         }
 949         else if ( areLongOptionsEnabled && !opt.longName.empty() )
 950         {
 951             usage << _T("--") << opt.longName;
 952         }
 953         else
 954         {
 955             if (!opt.longName.empty())
 956             {
 957                 wxFAIL_MSG( wxT("option with only a long name while long ")
 958                     wxT("options are disabled") );
 959             }
 960             else
 961             {
 962                 wxFAIL_MSG( _T("option without neither short nor long name") );
 963             }
 964         }
 965
 966         wxString option;
 967
 968         if ( !opt.shortName.empty() )
 969         {
 970             option << _T("  ") << chSwitch << opt.shortName;
 971         }
 972
 973         if ( areLongOptionsEnabled && !opt.longName.empty() )
 974         {
 975             option << (option.empty() ? _T("  ") : _T(", "))
 976                    << _T("--") << opt.longName;
 977         }
 978
 979         if ( opt.kind != wxCMD_LINE_SWITCH )
 980         {
 981             wxString val;
 982             val << _T('<') << GetTypeName(opt.type) << _T('>');
 983             usage << _T(' ') << val;
 984             option << (!opt.longName ? _T(':') : _T('=')) << val;
 985         }
 986
 987         if ( !(opt.flags & wxCMD_LINE_OPTION_MANDATORY) )
 988         {
 989             usage << _T(']');
 990         }
 991
 992         namesOptions.Add(option);
 993         descOptions.Add(opt.description);
 994     }
 995
 996     count = m_data->m_paramDesc.GetCount();
 997     for ( n = 0; n < count; n++ )
 998     {
 999         wxCmdLineParam& param = m_data->m_paramDesc[n];
1000
1001         usage << _T(' ');
1002         if ( param.flags & wxCMD_LINE_PARAM_OPTIONAL )
1003         {
1004             usage << _T('[');
1005         }
1006
1007         usage << param.description;
1008
1009         if ( param.flags & wxCMD_LINE_PARAM_MULTIPLE )
1010         {
1011             usage << _T("...");
1012         }
1013
1014         if ( param.flags & wxCMD_LINE_PARAM_OPTIONAL )
1015         {
1016             usage << _T(']');
1017         }
1018     }
1019
1020     usage << _T('\n');
1021
1022     // now construct the detailed help message
1023     size_t len, lenMax = 0;
1024     count = namesOptions.GetCount();
1025     for ( n = 0; n < count; n++ )
1026     {
1027         len = namesOptions[n].length();
1028         if ( len > lenMax )
1029             lenMax = len;
1030     }
1031
1032     for ( n = 0; n < count; n++ )
1033     {
1034         len = namesOptions[n].length();
1035         usage << namesOptions[n]
1036               << wxString(_T(' '), lenMax - len) << _T('\t')
1037               << descOptions[n]
1038               << _T('\n');
1039     }
1040
1041     return usage;
1042 }
1043
1044 // ----------------------------------------------------------------------------
1045 // private functions
1046 // ----------------------------------------------------------------------------
1047
1048 static wxString GetTypeName(wxCmdLineParamType type)
1049 {
1050     wxString s;
1051     switch ( type )
1052     {
1053         default:
1054             wxFAIL_MSG( _T("unknown option type") );
1055             // still fall through
1056
1057         case wxCMD_LINE_VAL_STRING:
1058             s = _("str");
1059             break;
1060
1061         case wxCMD_LINE_VAL_NUMBER:
1062             s = _("num");
1063             break;
1064
1065         case wxCMD_LINE_VAL_DATE:
1066             s = _("date");
1067             break;
1068     }
1069
1070     return s;
1071 }
1072
1073 /*
1074 Returns a string which is equal to the string pointed to by p, but up to the
1075 point where p contains an character that's not allowed.
1076 Allowable characters are letters and numbers, and characters pointed to by
1077 the parameter allowedChars.
1078
1079 For example, if p points to "abcde-@-_", and allowedChars is "-_",
1080 this function returns "abcde-".
1081 */
1082 static wxString GetOptionName(const wxChar *p,
1083     const wxChar *allowedChars)
1084 {
1085     wxString argName;
1086
1087     while ( *p && (wxIsalnum(*p) || wxStrchr(allowedChars, *p)) )
1088     {
1089         argName += *p++;
1090     }
1091
1092     return argName;
1093 }
1094
1095 // Besides alphanumeric characters, short and long options can
1096 // have other characters.
1097
1098 // A short option additionally can have these
1099 #define wxCMD_LINE_CHARS_ALLOWED_BY_SHORT_OPTION wxT("_?")
1100
1101 // A long option can have the same characters as a short option and a '-'.
1102 #define wxCMD_LINE_CHARS_ALLOWED_BY_LONG_OPTION \
1103     wxCMD_LINE_CHARS_ALLOWED_BY_SHORT_OPTION wxT("-")
1104
1105 static wxString GetShortOptionName(const wxChar *p)
1106 {
1107     return GetOptionName(p, wxCMD_LINE_CHARS_ALLOWED_BY_SHORT_OPTION);
1108 }
1109
1110 static wxString GetLongOptionName(const wxChar *p)
1111 {
1112     return GetOptionName(p, wxCMD_LINE_CHARS_ALLOWED_BY_LONG_OPTION);
1113 }
1114
1115 #endif // wxUSE_CMDLINE_PARSER
1116
1117 // ----------------------------------------------------------------------------
1118 // global functions
1119 // ----------------------------------------------------------------------------
1120
1121 /*
1122    This function is mainly used under Windows (as under Unix we always get the
1123    command line arguments as argc/argv anyhow) and so it tries to handle the
1124    Windows path names (separated by backslashes) correctly. For this it only
1125    considers that a backslash may be used to escape another backslash (but
1126    normally this is _not_ needed) or a quote but nothing else.
1127
1128    In particular, to pass a single argument containing a space to the program
1129    it should be quoted:
1130
1131    myprog.exe foo bar       -> argc = 3, argv[1] = "foo", argv[2] = "bar"
1132    myprog.exe "foo bar"     -> argc = 2, argv[1] = "foo bar"
1133
1134    To pass an argument containing spaces and quotes, the latter should be
1135    escaped with a backslash:
1136
1137    myprog.exe "foo \"bar\"" -> argc = 2, argv[1] = "foo "bar""
1138
1139    This hopefully matches the conventions used by Explorer/command line
1140    interpreter under Windows. If not, this function should be fixed.
1141  */
1142
1143 /* static */
1144 wxArrayString wxCmdLineParser::ConvertStringToArgs(const wxChar *p)
1145 {
1146     wxArrayString args;
1147
1148     wxString arg;
1149     arg.reserve(1024);
1150
1151     bool isInsideQuotes = FALSE;
1152     for ( ;; )
1153     {
1154         // skip white space
1155         while ( *p == _T(' ') || *p == _T('\t') )
1156             p++;
1157
1158         // anything left?
1159         if ( *p == _T('\0') )
1160             break;
1161
1162         // parse this parameter
1163         arg.clear();
1164         for ( ;; p++ )
1165         {
1166             // do we have a (lone) backslash?
1167             bool isQuotedByBS = FALSE;
1168             while ( *p == _T('\\') )
1169             {
1170                 p++;
1171
1172                 // if we have 2 backslashes in a row, output one
1173                 // unless it looks like a UNC path \\machine\dir\file.ext
1174                 if ( isQuotedByBS || arg.Len() == 0 )
1175                 {
1176                     arg += _T('\\');
1177                     isQuotedByBS = FALSE;
1178                 }
1179                 else // the next char is quoted
1180                 {
1181                     isQuotedByBS = TRUE;
1182                 }
1183             }
1184
1185             bool skipChar = FALSE,
1186                  endParam = FALSE;
1187             switch ( *p )
1188             {
1189                 case _T('"'):
1190                     if ( !isQuotedByBS )
1191                     {
1192                         // don't put the quote itself in the arg
1193                         skipChar = TRUE;
1194
1195                         isInsideQuotes = !isInsideQuotes;
1196                     }
1197                     //else: insert a literal quote
1198
1199                     break;
1200
1201                 case _T(' '):
1202                 case _T('\t'):
1203                     // we intentionally don't check for preceding backslash
1204                     // here as if we allowed it to be used to escape spaces the
1205                     // cmd line of the form "foo.exe a:\ c:\bar" wouldn't be
1206                     // parsed correctly
1207                     if ( isInsideQuotes )
1208                     {
1209                         // preserve it, skip endParam below
1210                         break;
1211                     }
1212                     //else: fall through
1213
1214                 case _T('\0'):
1215                     endParam = TRUE;
1216                     break;
1217
1218                 default:
1219                     if ( isQuotedByBS )
1220                     {
1221                         // ignore backslash before an ordinary character - this
1222                         // is needed to properly handle the file names under
1223                         // Windows appearing in the command line
1224                         arg += _T('\\');
1225                     }
1226             }
1227
1228             // end of argument?
1229             if ( endParam )
1230                 break;
1231
1232             // otherwise copy this char to arg
1233             if ( !skipChar )
1234             {
1235                 arg += *p;
1236             }
1237         }
1238
1239         args.Add(arg);
1240     }
1241
1242     return args;
1243 }
1244