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 license
  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 #if wxUSE_CMDLINE_PARSER
  32
  33 #ifndef WX_PRECOMP
  34     #include "wx/string.h"
  35     #include "wx/log.h"
  36     #include "wx/intl.h"
  37     #include "wx/app.h"
  38     #include "wx/dynarray.h"
  39     #include "wx/filefn.h"
  40 #endif //WX_PRECOMP
  41
  42 #include <ctype.h>
  43
  44 #include "wx/datetime.h"
  45 #include "wx/cmdline.h"
  46
  47 // ----------------------------------------------------------------------------
  48 // private functions
  49 // ----------------------------------------------------------------------------
  50
  51 static wxString GetTypeName(wxCmdLineParamType type);
  52
  53 // ----------------------------------------------------------------------------
  54 // private classes
  55 // ----------------------------------------------------------------------------
  56
  57 // an internal representation of an option
  58 struct wxCmdLineOption
  59 {
  60     wxCmdLineOption(wxCmdLineEntryType k,
  61                     const wxString& shrt,
  62                     const wxString& lng,
  63                     const wxString& desc,
  64                     wxCmdLineParamType typ,
  65                     int fl)
  66     {
  67         wxASSERT_MSG( !shrt.empty() || !lng.empty(),
  68                       _T("option should have at least one name") );
  69
  70         kind = k;
  71
  72         shortName = shrt;
  73         longName = lng;
  74         description = desc;
  75
  76         type = typ;
  77         flags = fl;
  78
  79         m_hasVal = FALSE;
  80     }
  81
  82     // can't use union easily here, so just store all possible data fields, we
  83     // don't waste much (might still use union later if the number of supported
  84     // types increases, so always use the accessor functions and don't access
  85     // the fields directly!)
  86
  87     void Check(wxCmdLineParamType WXUNUSED_UNLESS_DEBUG(typ)) const
  88     {
  89         wxASSERT_MSG( type == typ, _T("type mismatch in wxCmdLineOption") );
  90     }
  91
  92     long GetLongVal() const
  93         { Check(wxCMD_LINE_VAL_NUMBER); return m_longVal; }
  94     const wxString& GetStrVal() const
  95         { Check(wxCMD_LINE_VAL_STRING); return m_strVal;  }
  96     const wxDateTime& GetDateVal() const
  97         { Check(wxCMD_LINE_VAL_DATE);   return m_dateVal; }
  98
  99     void SetLongVal(long val)
 100         { Check(wxCMD_LINE_VAL_NUMBER); m_longVal = val; m_hasVal = TRUE; }
 101     void SetStrVal(const wxString& val)
 102         { Check(wxCMD_LINE_VAL_STRING); m_strVal = val; m_hasVal = TRUE; }
 103     void SetDateVal(const wxDateTime val)
 104         { Check(wxCMD_LINE_VAL_DATE); m_dateVal = val; m_hasVal = TRUE; }
 105
 106     void SetHasValue(bool hasValue = TRUE) { m_hasVal = hasValue; }
 107     bool HasValue() const { return m_hasVal; }
 108
 109 public:
 110     wxCmdLineEntryType kind;
 111     wxString shortName, longName, description;
 112     wxCmdLineParamType type;
 113     int flags;
 114
 115 private:
 116     bool m_hasVal;
 117
 118     long m_longVal;
 119     wxString m_strVal;
 120     wxDateTime m_dateVal;
 121 };
 122
 123 struct wxCmdLineParam
 124 {
 125     wxCmdLineParam(const wxString& desc,
 126                    wxCmdLineParamType typ,
 127                    int fl)
 128         : description(desc)
 129     {
 130         type = typ;
 131         flags = fl;
 132     }
 133
 134     wxString description;
 135     wxCmdLineParamType type;
 136     int flags;
 137 };
 138
 139 WX_DECLARE_OBJARRAY(wxCmdLineOption, wxArrayOptions);
 140 WX_DECLARE_OBJARRAY(wxCmdLineParam, wxArrayParams);
 141
 142 #include "wx/arrimpl.cpp"
 143
 144 WX_DEFINE_OBJARRAY(wxArrayOptions);
 145 WX_DEFINE_OBJARRAY(wxArrayParams);
 146
 147 // the parser internal state
 148 struct wxCmdLineParserData
 149 {
 150     // options
 151     wxString m_switchChars;     // characters which may start an option
 152     bool m_enableLongOptions;   // TRUE if long options are enabled
 153     wxString m_logo;            // some extra text to show in Usage()
 154
 155     // cmd line data
 156     wxArrayString m_arguments;  // == argv, argc == m_arguments.GetCount()
 157     wxArrayOptions m_options;   // all possible options and switchrs
 158     wxArrayParams m_paramDesc;  // description of all possible params
 159     wxArrayString m_parameters; // all params found
 160
 161     // methods
 162     wxCmdLineParserData();
 163     void SetArguments(int argc, char **argv);
 164     void SetArguments(const wxString& cmdline);
 165
 166     int FindOption(const wxString& name);
 167     int FindOptionByLongName(const wxString& name);
 168 };
 169
 170 // ============================================================================
 171 // implementation
 172 // ============================================================================
 173
 174 // ----------------------------------------------------------------------------
 175 // wxCmdLineParserData
 176 // ----------------------------------------------------------------------------
 177
 178 wxCmdLineParserData::wxCmdLineParserData()
 179 {
 180     m_enableLongOptions = TRUE;
 181 #ifdef __UNIX_LIKE__
 182     m_switchChars = _T("-");
 183 #else // !Unix
 184     m_switchChars = _T("/-");
 185 #endif
 186 }
 187
 188 void wxCmdLineParserData::SetArguments(int argc, char **argv)
 189 {
 190     m_arguments.Empty();
 191
 192     for ( int n = 0; n < argc; n++ )
 193     {
 194         m_arguments.Add(argv[n]);
 195     }
 196 }
 197
 198 void wxCmdLineParserData::SetArguments(const wxString& cmdLine)
 199 {
 200     m_arguments.Empty();
 201
 202     m_arguments.Add(wxTheApp->GetAppName());
 203
 204     // Break up string
 205     // Treat strings enclosed in double-quotes as single arguments
 206     int i = 0;
 207     int len = cmdLine.Length();
 208     while (i < len)
 209     {
 210         // Skip whitespace
 211         while ((i < len) && wxIsspace(cmdLine.GetChar(i)))
 212             i ++;
 213
 214         if (i < len)
 215         {
 216             if (cmdLine.GetChar(i) == wxT('"')) // We found the start of a string
 217             {
 218                 i ++;
 219                 int first = i;
 220                 while ((i < len) && (cmdLine.GetChar(i) != wxT('"')))
 221                     i ++;
 222
 223                 wxString arg(cmdLine.Mid(first, (i - first)));
 224
 225                 m_arguments.Add(arg);
 226
 227                 if (i < len)
 228                     i ++; // Skip past 2nd quote
 229             }
 230             else // Unquoted argument
 231             {
 232                 int first = i;
 233                 while ((i < len) && !wxIsspace(cmdLine.GetChar(i)))
 234                     i ++;
 235
 236                 wxString arg(cmdLine.Mid(first, (i - first)));
 237
 238                 m_arguments.Add(arg);
 239             }
 240         }
 241     }
 242 }
 243
 244 int wxCmdLineParserData::FindOption(const wxString& name)
 245 {
 246     if ( !name.empty() )
 247     {
 248         size_t count = m_options.GetCount();
 249         for ( size_t n = 0; n < count; n++ )
 250         {
 251             if ( m_options[n].shortName == name )
 252             {
 253                 // found
 254                 return n;
 255             }
 256         }
 257     }
 258
 259     return wxNOT_FOUND;
 260 }
 261
 262 int wxCmdLineParserData::FindOptionByLongName(const wxString& name)
 263 {
 264     size_t count = m_options.GetCount();
 265     for ( size_t n = 0; n < count; n++ )
 266     {
 267         if ( m_options[n].longName == name )
 268         {
 269             // found
 270             return n;
 271         }
 272     }
 273
 274     return wxNOT_FOUND;
 275 }
 276
 277 // ----------------------------------------------------------------------------
 278 // construction and destruction
 279 // ----------------------------------------------------------------------------
 280
 281 void wxCmdLineParser::Init()
 282 {
 283     m_data = new wxCmdLineParserData;
 284 }
 285
 286 void wxCmdLineParser::SetCmdLine(int argc, char **argv)
 287 {
 288     m_data->SetArguments(argc, argv);
 289 }
 290
 291 void wxCmdLineParser::SetCmdLine(const wxString& cmdline)
 292 {
 293     m_data->SetArguments(cmdline);
 294 }
 295
 296 wxCmdLineParser::~wxCmdLineParser()
 297 {
 298     delete m_data;
 299 }
 300
 301 // ----------------------------------------------------------------------------
 302 // options
 303 // ----------------------------------------------------------------------------
 304
 305 void wxCmdLineParser::SetSwitchChars(const wxString& switchChars)
 306 {
 307     m_data->m_switchChars = switchChars;
 308 }
 309
 310 void wxCmdLineParser::EnableLongOptions(bool enable)
 311 {
 312     m_data->m_enableLongOptions = enable;
 313 }
 314
 315 void wxCmdLineParser::SetLogo(const wxString& logo)
 316 {
 317     m_data->m_logo = logo;
 318 }
 319
 320 // ----------------------------------------------------------------------------
 321 // command line construction
 322 // ----------------------------------------------------------------------------
 323
 324 void wxCmdLineParser::SetDesc(const wxCmdLineEntryDesc *desc)
 325 {
 326     for ( ;; desc++ )
 327     {
 328         switch ( desc->kind )
 329         {
 330             case wxCMD_LINE_SWITCH:
 331                 AddSwitch(desc->shortName, desc->longName, desc->description,
 332                           desc->flags);
 333                 break;
 334
 335             case wxCMD_LINE_OPTION:
 336                 AddOption(desc->shortName, desc->longName, desc->description,
 337                           desc->type, desc->flags);
 338                 break;
 339
 340             case wxCMD_LINE_PARAM:
 341                 AddParam(desc->description, desc->type, desc->flags);
 342                 break;
 343
 344             default:
 345                 wxFAIL_MSG( _T("unknown command line entry type") );
 346                 // still fall through
 347
 348             case wxCMD_LINE_NONE:
 349                 return;
 350         }
 351     }
 352 }
 353
 354 void wxCmdLineParser::AddSwitch(const wxString& shortName,
 355                                 const wxString& longName,
 356                                 const wxString& desc,
 357                                 int flags)
 358 {
 359     wxASSERT_MSG( m_data->FindOption(shortName) == wxNOT_FOUND,
 360                   _T("duplicate switch") );
 361
 362     wxCmdLineOption *option = new wxCmdLineOption(wxCMD_LINE_SWITCH,
 363                                                   shortName, longName, desc,
 364                                                   wxCMD_LINE_VAL_NONE, flags);
 365
 366     m_data->m_options.Add(option);
 367 }
 368
 369 void wxCmdLineParser::AddOption(const wxString& shortName,
 370                                 const wxString& longName,
 371                                 const wxString& desc,
 372                                 wxCmdLineParamType type,
 373                                 int flags)
 374 {
 375     wxASSERT_MSG( m_data->FindOption(shortName) == wxNOT_FOUND,
 376                   _T("duplicate option") );
 377
 378     wxCmdLineOption *option = new wxCmdLineOption(wxCMD_LINE_OPTION,
 379                                                   shortName, longName, desc,
 380                                                   type, flags);
 381
 382     m_data->m_options.Add(option);
 383 }
 384
 385 void wxCmdLineParser::AddParam(const wxString& desc,
 386                                wxCmdLineParamType type,
 387                                int flags)
 388 {
 389     // do some consistency checks: a required parameter can't follow an
 390     // optional one and nothing should follow a parameter with MULTIPLE flag
 391 #ifdef __WXDEBUG__
 392     if ( !m_data->m_paramDesc.IsEmpty() )
 393     {
 394         wxCmdLineParam& param = m_data->m_paramDesc.Last();
 395
 396         wxASSERT_MSG( !(param.flags & wxCMD_LINE_PARAM_MULTIPLE),
 397                       _T("all parameters after the one with wxCMD_LINE_PARAM_MULTIPLE style will be ignored") );
 398
 399         if ( !(flags & wxCMD_LINE_PARAM_OPTIONAL) )
 400         {
 401             wxASSERT_MSG( !(param.flags & wxCMD_LINE_PARAM_OPTIONAL),
 402                           _T("a required parameter can't follow an optional one") );
 403         }
 404     }
 405 #endif // Debug
 406
 407     wxCmdLineParam *param = new wxCmdLineParam(desc, type, flags);
 408
 409     m_data->m_paramDesc.Add(param);
 410 }
 411
 412 // ----------------------------------------------------------------------------
 413 // access to parse command line
 414 // ----------------------------------------------------------------------------
 415
 416 bool wxCmdLineParser::Found(const wxString& name) const
 417 {
 418     int i = m_data->FindOption(name);
 419     if ( i == wxNOT_FOUND )
 420         i = m_data->FindOptionByLongName(name);
 421
 422     wxCHECK_MSG( i != wxNOT_FOUND, FALSE, _T("unknown switch") );
 423
 424     wxCmdLineOption& opt = m_data->m_options[(size_t)i];
 425     if ( !opt.HasValue() )
 426         return FALSE;
 427
 428     return TRUE;
 429 }
 430
 431 bool wxCmdLineParser::Found(const wxString& name, wxString *value) const
 432 {
 433     int i = m_data->FindOption(name);
 434     if ( i == wxNOT_FOUND )
 435         i = m_data->FindOptionByLongName(name);
 436
 437     wxCHECK_MSG( i != wxNOT_FOUND, FALSE, _T("unknown option") );
 438
 439     wxCmdLineOption& opt = m_data->m_options[(size_t)i];
 440     if ( !opt.HasValue() )
 441         return FALSE;
 442
 443     wxCHECK_MSG( value, FALSE, _T("NULL pointer in wxCmdLineOption::Found") );
 444
 445     *value = opt.GetStrVal();
 446
 447     return TRUE;
 448 }
 449
 450 bool wxCmdLineParser::Found(const wxString& name, long *value) const
 451 {
 452     int i = m_data->FindOption(name);
 453     if ( i == wxNOT_FOUND )
 454         i = m_data->FindOptionByLongName(name);
 455
 456     wxCHECK_MSG( i != wxNOT_FOUND, FALSE, _T("unknown option") );
 457
 458     wxCmdLineOption& opt = m_data->m_options[(size_t)i];
 459     if ( !opt.HasValue() )
 460         return FALSE;
 461
 462     wxCHECK_MSG( value, FALSE, _T("NULL pointer in wxCmdLineOption::Found") );
 463
 464     *value = opt.GetLongVal();
 465
 466     return TRUE;
 467 }
 468
 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
 488 size_t wxCmdLineParser::GetParamCount() const
 489 {
 490     return m_data->m_parameters.GetCount();
 491 }
 492
 493 wxString wxCmdLineParser::GetParam(size_t n) const
 494 {
 495     return m_data->m_parameters[n];
 496 }
 497
 498 // Resets switches and options
 499 void wxCmdLineParser::Reset()
 500 {
 501     for ( size_t i = 0; i < m_data->m_options.Count(); i++ )
 502     {
 503         wxCmdLineOption& opt = m_data->m_options[i];
 504         opt.SetHasValue(FALSE);
 505     }
 506 }
 507
 508
 509 // ----------------------------------------------------------------------------
 510 // the real work is done here
 511 // ----------------------------------------------------------------------------
 512
 513 int wxCmdLineParser::Parse()
 514 {
 515     bool maybeOption = TRUE;    // can the following arg be an option?
 516     bool ok = TRUE;             // TRUE until an error is detected
 517     bool helpRequested = FALSE; // TRUE if "-h" was given
 518     bool hadRepeatableParam = FALSE; // TRUE if found param with MULTIPLE flag
 519
 520     size_t currentParam = 0;    // the index in m_paramDesc
 521
 522     size_t countParam = m_data->m_paramDesc.GetCount();
 523
 524     Reset();
 525
 526     // parse everything
 527     wxString arg;
 528     size_t count = m_data->m_arguments.GetCount();
 529     for ( size_t n = 1; ok && (n < count); n++ )    // 0 is program name
 530     {
 531         arg = m_data->m_arguments[n];
 532
 533         // special case: "--" should be discarded and all following arguments
 534         // should be considered as parameters, even if they start with '-' and
 535         // not like options (this is POSIX-like)
 536         if ( arg == _T("--") )
 537         {
 538             maybeOption = FALSE;
 539
 540             continue;
 541         }
 542
 543         // empty argument or just '-' is not an option but a parameter
 544         if ( maybeOption && arg.length() > 1 &&
 545                 wxStrchr(m_data->m_switchChars, arg[0u]) )
 546         {
 547             bool isLong;
 548             wxString name;
 549             int optInd = wxNOT_FOUND;   // init to suppress warnings
 550
 551             // an option or a switch: find whether it's a long or a short one
 552             if ( m_data->m_enableLongOptions &&
 553                     arg[0u] == _T('-') && arg[1u] == _T('-') )
 554             {
 555                 // a long one
 556                 isLong = TRUE;
 557
 558                 const wxChar *p = arg.c_str() + 2;
 559                 while ( wxIsalnum(*p) || (*p == _T('_')) || (*p == _T('-')) )
 560                 {
 561                     name += *p++;
 562                 }
 563
 564                 optInd = m_data->FindOptionByLongName(name);
 565                 if ( optInd == wxNOT_FOUND )
 566                 {
 567                     wxLogError(_("Unknown long option '%s'"), name.c_str());
 568                 }
 569             }
 570             else
 571             {
 572                 isLong = FALSE;
 573
 574                 // a short one: as they can be cumulated, we try to find the
 575                 // longest substring which is a valid option
 576                 const wxChar *p = arg.c_str() + 1;
 577                 while ( wxIsalnum(*p) || (*p == _T('_')) )
 578                 {
 579                     name += *p++;
 580                 }
 581
 582                 size_t len = name.length();
 583                 do
 584                 {
 585                     if ( len == 0 )
 586                     {
 587                         // we couldn't find a valid option name in the
 588                         // beginning of this string
 589                         wxLogError(_("Unknown option '%s'"), name.c_str());
 590
 591                         break;
 592                     }
 593                     else
 594                     {
 595                         optInd = m_data->FindOption(name.Left(len));
 596
 597                         // will try with one character less the next time
 598                         len--;
 599                     }
 600                 }
 601                 while ( optInd == wxNOT_FOUND );
 602
 603                 len++;  // compensates extra len-- above
 604                 if ( (optInd != wxNOT_FOUND) && (len != name.length()) )
 605                 {
 606                     // first of all, the option name is only part of this
 607                     // string
 608                     name = name.Left(len);
 609
 610                     // our option is only part of this argument, there is
 611                     // something else in it - it is either the value of this
 612                     // option or other switches if it is a switch
 613                     if ( m_data->m_options[(size_t)optInd].kind
 614                             == wxCMD_LINE_SWITCH )
 615                     {
 616                         // pretend that all the rest of the argument is the
 617                         // next argument, in fact
 618                         wxString arg2 = arg[0u];
 619                         arg2 += arg.Mid(len + 1); // +1 for leading '-'
 620
 621                         m_data->m_arguments.Insert(arg2, n + 1);
 622                         count++;
 623                     }
 624                     //else: it's our value, we'll deal with it below
 625                 }
 626             }
 627
 628             if ( optInd == wxNOT_FOUND )
 629             {
 630                 ok = FALSE;
 631
 632                 continue;   // will break, in fact
 633             }
 634
 635             wxCmdLineOption& opt = m_data->m_options[(size_t)optInd];
 636             if ( opt.kind == wxCMD_LINE_SWITCH )
 637             {
 638                 // nothing more to do
 639                 opt.SetHasValue();
 640
 641                 if ( opt.flags & wxCMD_LINE_OPTION_HELP )
 642                 {
 643                     helpRequested = TRUE;
 644
 645                     // it's not an error, but we still stop here
 646                     ok = FALSE;
 647                 }
 648             }
 649             else
 650             {
 651                 // get the value
 652
 653                 // +1 for leading '-'
 654                 const wxChar *p = arg.c_str() + 1 + name.length();
 655                 if ( isLong )
 656                 {
 657                     p++;    // for another leading '-'
 658
 659                     if ( *p++ != _T('=') )
 660                     {
 661                         wxLogError(_("Option '%s' requires a value, '=' expected."), name.c_str());
 662
 663                         ok = FALSE;
 664                     }
 665                 }
 666                 else
 667                 {
 668                     switch ( *p )
 669                     {
 670                         case _T('='):
 671                         case _T(':'):
 672                             // the value follows
 673                             p++;
 674                             break;
 675
 676                         case 0:
 677                             // the value is in the next argument
 678                             if ( ++n == count )
 679                             {
 680                                 // ... but there is none
 681                                 wxLogError(_("Option '%s' requires a value."),
 682                                            name.c_str());
 683
 684                                 ok = FALSE;
 685                             }
 686                             else
 687                             {
 688                                 // ... take it from there
 689                                 p = m_data->m_arguments[n].c_str();
 690                             }
 691                             break;
 692
 693                         default:
 694                             // the value is right here: this may be legal or
 695                             // not depending on the option style
 696                             if ( opt.flags & wxCMD_LINE_NEEDS_SEPARATOR )
 697                             {
 698                                 wxLogError(_("Separator expected after the option '%s'."),
 699                                            name.c_str());
 700
 701                                 ok = FALSE;
 702                             }
 703                     }
 704                 }
 705
 706                 if ( ok )
 707                 {
 708                     wxString value = p;
 709                     switch ( opt.type )
 710                     {
 711                         default:
 712                             wxFAIL_MSG( _T("unknown option type") );
 713                             // still fall through
 714
 715                         case wxCMD_LINE_VAL_STRING:
 716                             opt.SetStrVal(value);
 717                             break;
 718
 719                         case wxCMD_LINE_VAL_NUMBER:
 720                             {
 721                                 long val;
 722                                 if ( value.ToLong(&val) )
 723                                 {
 724                                     opt.SetLongVal(val);
 725                                 }
 726                                 else
 727                                 {
 728                                     wxLogError(_("'%s' is not a correct numeric value for option '%s'."),
 729                                                value.c_str(), name.c_str());
 730
 731                                     ok = FALSE;
 732                                 }
 733                             }
 734                             break;
 735
 736                         case wxCMD_LINE_VAL_DATE:
 737                             {
 738                                 wxDateTime dt;
 739                                 const wxChar *res = dt.ParseDate(value);
 740                                 if ( !res || *res )
 741                                 {
 742                                     wxLogError(_("Option '%s': '%s' cannot be converted to a date."),
 743                                                name.c_str(), value.c_str());
 744
 745                                     ok = FALSE;
 746                                 }
 747                                 else
 748                                 {
 749                                     opt.SetDateVal(dt);
 750                                 }
 751                             }
 752                             break;
 753                     }
 754                 }
 755             }
 756         }
 757         else
 758         {
 759             // a parameter
 760             if ( currentParam < countParam )
 761             {
 762                 wxCmdLineParam& param = m_data->m_paramDesc[currentParam];
 763
 764                 // TODO check the param type
 765
 766                 m_data->m_parameters.Add(arg);
 767
 768                 if ( !(param.flags & wxCMD_LINE_PARAM_MULTIPLE) )
 769                 {
 770                     currentParam++;
 771                 }
 772                 else
 773                 {
 774                     wxASSERT_MSG( currentParam == countParam - 1,
 775                                   _T("all parameters after the one with wxCMD_LINE_PARAM_MULTIPLE style are ignored") );
 776
 777                     // remember that we did have this last repeatable parameter
 778                     hadRepeatableParam = TRUE;
 779                 }
 780             }
 781             else
 782             {
 783                 wxLogError(_("Unexpected parameter '%s'"), arg.c_str());
 784
 785                 ok = FALSE;
 786             }
 787         }
 788     }
 789
 790     // verify that all mandatory options were given
 791     if ( ok )
 792     {
 793         size_t countOpt = m_data->m_options.GetCount();
 794         for ( size_t n = 0; ok && (n < countOpt); n++ )
 795         {
 796             wxCmdLineOption& opt = m_data->m_options[n];
 797             if ( (opt.flags & wxCMD_LINE_OPTION_MANDATORY) && !opt.HasValue() )
 798             {
 799                 wxString optName;
 800                 if ( !opt.longName )
 801                 {
 802                     optName = opt.shortName;
 803                 }
 804                 else
 805                 {
 806                     optName.Printf(_("%s (or %s)"),
 807                                    opt.shortName.c_str(),
 808                                    opt.longName.c_str());
 809                 }
 810
 811                 wxLogError(_("The value for the option '%s' must be specified."),
 812                            optName.c_str());
 813
 814                 ok = FALSE;
 815             }
 816         }
 817
 818         for ( ; ok && (currentParam < countParam); currentParam++ )
 819         {
 820             wxCmdLineParam& param = m_data->m_paramDesc[currentParam];
 821             if ( (currentParam == countParam - 1) &&
 822                  (param.flags & wxCMD_LINE_PARAM_MULTIPLE) &&
 823                  hadRepeatableParam )
 824             {
 825                 // special case: currentParam wasn't incremented, but we did
 826                 // have it, so don't give error
 827                 continue;
 828             }
 829
 830             if ( !(param.flags & wxCMD_LINE_PARAM_OPTIONAL) )
 831             {
 832                 wxLogError(_("The required parameter '%s' was not specified."),
 833                            param.description.c_str());
 834
 835                 ok = FALSE;
 836             }
 837         }
 838     }
 839
 840     if ( !ok )
 841     {
 842         Usage();
 843     }
 844
 845     return ok ? 0 : helpRequested ? -1 : 1;
 846 }
 847
 848 // ----------------------------------------------------------------------------
 849 // give the usage message
 850 // ----------------------------------------------------------------------------
 851
 852 void wxCmdLineParser::Usage()
 853 {
 854     wxString appname = wxTheApp->GetAppName();
 855     if ( !appname )
 856     {
 857         wxCHECK_RET( !m_data->m_arguments.IsEmpty(), _T("no program name") );
 858
 859         appname = wxFileNameFromPath(m_data->m_arguments[0]);
 860         wxStripExtension(appname);
 861     }
 862
 863     // we construct the brief cmd line desc on the fly, but not the detailed
 864     // help message below because we want to align the options descriptions
 865     // and for this we must first know the longest one of them
 866     wxString brief;
 867     wxArrayString namesOptions, descOptions;
 868     brief.Printf(_("Usage: %s"), appname.c_str());
 869
 870     // the switch char is usually '-' but this can be changed with
 871     // SetSwitchChars() and then the first one of possible chars is used
 872     wxChar chSwitch = !m_data->m_switchChars ? _T('-')
 873                                              : m_data->m_switchChars[0u];
 874
 875     size_t n, count = m_data->m_options.GetCount();
 876     for ( n = 0; n < count; n++ )
 877     {
 878         wxCmdLineOption& opt = m_data->m_options[n];
 879
 880         brief << _T(' ');
 881         if ( !(opt.flags & wxCMD_LINE_OPTION_MANDATORY) )
 882         {
 883             brief << _T('[');
 884         }
 885
 886         brief << chSwitch << opt.shortName;
 887
 888         wxString option;
 889         option << _T("  ") << chSwitch << opt.shortName;
 890         if ( !!opt.longName )
 891         {
 892             option << _T("  --") << opt.longName;
 893         }
 894
 895         if ( opt.kind != wxCMD_LINE_SWITCH )
 896         {
 897             wxString val;
 898             val << _T('<') << GetTypeName(opt.type) << _T('>');
 899             brief << _T(' ') << val;
 900             option << (!opt.longName ? _T(':') : _T('=')) << val;
 901         }
 902
 903         if ( !(opt.flags & wxCMD_LINE_OPTION_MANDATORY) )
 904         {
 905             brief << _T(']');
 906         }
 907
 908         namesOptions.Add(option);
 909         descOptions.Add(opt.description);
 910     }
 911
 912     count = m_data->m_paramDesc.GetCount();
 913     for ( n = 0; n < count; n++ )
 914     {
 915         wxCmdLineParam& param = m_data->m_paramDesc[n];
 916
 917         brief << _T(' ');
 918         if ( param.flags & wxCMD_LINE_PARAM_OPTIONAL )
 919         {
 920             brief << _T('[');
 921         }
 922
 923         brief << param.description;
 924
 925         if ( param.flags & wxCMD_LINE_PARAM_MULTIPLE )
 926         {
 927             brief << _T("...");
 928         }
 929
 930         if ( param.flags & wxCMD_LINE_PARAM_OPTIONAL )
 931         {
 932             brief << _T(']');
 933         }
 934     }
 935
 936     if ( !!m_data->m_logo )
 937     {
 938         wxLogMessage(m_data->m_logo);
 939     }
 940
 941     wxLogMessage(brief);
 942
 943     // now construct the detailed help message
 944     size_t len, lenMax = 0;
 945     count = namesOptions.GetCount();
 946     for ( n = 0; n < count; n++ )
 947     {
 948         len = namesOptions[n].length();
 949         if ( len > lenMax )
 950             lenMax = len;
 951     }
 952
 953     wxString detailed;
 954     for ( n = 0; n < count; n++ )
 955     {
 956         len = namesOptions[n].length();
 957         detailed << namesOptions[n]
 958                  << wxString(_T(' '), lenMax - len) << _T('\t')
 959                  << descOptions[n]
 960                  << _T('\n');
 961     }
 962
 963     wxLogMessage(detailed);
 964 }
 965
 966 // ----------------------------------------------------------------------------
 967 // global functions
 968 // ----------------------------------------------------------------------------
 969
 970 static wxString GetTypeName(wxCmdLineParamType type)
 971 {
 972     wxString s;
 973     switch ( type )
 974     {
 975         default:
 976             wxFAIL_MSG( _T("unknown option type") );
 977             // still fall through
 978
 979         case wxCMD_LINE_VAL_STRING: s = _("str"); break;
 980         case wxCMD_LINE_VAL_NUMBER: s = _("num"); break;
 981         case wxCMD_LINE_VAL_DATE:   s = _("date"); break;
 982     }
 983
 984     return s;
 985 }
 986
 987 #endif // wxUSE_CMDLINE_PARSER