src/common/utilscmn.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        utilscmn.cpp
   3 // Purpose:     Miscellaneous utility functions and classes
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     29/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1998 Julian Smart
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  21     #pragma implementation "utils.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/defs.h"
  33     #include "wx/string.h"
  34     #include "wx/utils.h"
  35     #include "wx/intl.h"
  36     #include "wx/log.h"
  37
  38     #if wxUSE_GUI
  39         #include "wx/window.h"
  40         #include "wx/menu.h"
  41         #include "wx/frame.h"
  42         #include "wx/msgdlg.h"
  43         #include "wx/textdlg.h"
  44         #if wxUSE_ACCEL
  45             #include "wx/menuitem.h"
  46             #include "wx/accel.h"
  47         #endif // wxUSE_ACCEL
  48     #endif // wxUSE_GUI
  49 #endif // WX_PRECOMP
  50
  51 #ifndef __WIN16__
  52 #include "wx/process.h"
  53 #include "wx/txtstrm.h"
  54 #endif
  55
  56 #include <ctype.h>
  57 #include <stdio.h>
  58 #include <stdlib.h>
  59 #include <string.h>
  60
  61 #if !defined(__WATCOMC__)
  62     #if !(defined(_MSC_VER) && (_MSC_VER > 800))
  63         #include <errno.h>
  64     #endif
  65 #endif
  66
  67 #if wxUSE_GUI
  68     #include "wx/colordlg.h"
  69     #include "wx/notebook.h"
  70     #include "wx/frame.h"
  71     #include "wx/statusbr.h"
  72     #include "wx/toolbar.h"
  73 #endif // wxUSE_GUI
  74
  75 #include <time.h>
  76
  77 #ifndef __MWERKS__
  78     #include <sys/types.h>
  79     #include <sys/stat.h>
  80 #endif
  81
  82 #ifdef __SALFORDC__
  83     #include <clib.h>
  84 #endif
  85
  86 #ifdef __WXMSW__
  87     #include "wx/msw/private.h"
  88 #endif
  89
  90 // ----------------------------------------------------------------------------
  91 // function protoypes
  92 // ----------------------------------------------------------------------------
  93
  94 #if wxUSE_GUI
  95     static wxWindow *wxFindWindowByLabel1(const wxString& title, wxWindow *parent);
  96     static wxWindow *wxFindWindowByName1 (const wxString& title, wxWindow *parent);
  97 #endif // wxUSE_GUI
  98
  99 // ============================================================================
 100 // implementation
 101 // ============================================================================
 102
 103 // ----------------------------------------------------------------------------
 104 // string functions
 105 // ----------------------------------------------------------------------------
 106
 107 #ifdef __WXMAC__
 108 int strcasecmp(const char *str_1, const char *str_2)
 109 {
 110   register char c1, c2;
 111   do {
 112     c1 = tolower(*str_1++);
 113     c2 = tolower(*str_2++);
 114   } while ( c1 && (c1 == c2) );
 115
 116   return c1 - c2;
 117 }
 118
 119 int strncasecmp(const char *str_1, const char *str_2, size_t maxchar)
 120 {
 121
 122   register char c1, c2;
 123   while( maxchar--)
 124   {
 125     c1 = tolower(*str_1++);
 126     c2 = tolower(*str_2++);
 127
 128     if ( !c1 || c1!=c2 )
 129                   return c1 - c2;
 130
 131   } ;
 132
 133   return 0 ;
 134
 135 }
 136 #endif // wxMAC
 137
 138 #if defined( __VMS__ ) && ( __VMS_VER < 70000000 )
 139 // we have no strI functions under VMS, therefore I have implemented
 140 // an inefficient but portable version: convert copies of strings to lowercase
 141 // and then use the normal comparison
 142 static void myLowerString(char *s)
 143 {
 144   while(*s){
 145     if(isalpha(*s)) *s = (char)tolower(*s);
 146     s++;
 147   }
 148 }
 149
 150 int strcasecmp(const char *str_1, const char *str_2)
 151 {
 152   char *temp1 = new char[strlen(str_1)+1];
 153   char *temp2 = new char[strlen(str_2)+1];
 154   strcpy(temp1,str_1);
 155   strcpy(temp2,str_2);
 156   myLowerString(temp1);
 157   myLowerString(temp2);
 158
 159   int result = wxStrcmp(temp1,temp2);
 160   delete[] temp1;
 161   delete[] temp2;
 162
 163   return(result);
 164 }
 165
 166 int strncasecmp(const char *str_1, const char *str_2, size_t maxchar)
 167 {
 168   char *temp1 = new char[strlen(str_1)+1];
 169   char *temp2 = new char[strlen(str_2)+1];
 170   strcpy(temp1,str_1);
 171   strcpy(temp2,str_2);
 172   myLowerString(temp1);
 173   myLowerString(temp2);
 174
 175   int result = strncmp(temp1,temp2,maxchar);
 176   delete[] temp1;
 177   delete[] temp2;
 178
 179   return(result);
 180 }
 181 #endif // __VMS__
 182
 183 #ifdef __WINDOWS__
 184
 185 #ifndef __GNUWIN32__
 186 #ifndef __MWERKS__
 187 #define strcasecmp stricmp
 188 #define strncasecmp strnicmp
 189 #else
 190 #define strcasecmp _stricmp
 191 #define strncasecmp _strnicmp
 192 #endif
 193 #endif
 194
 195 #else
 196
 197 #ifdef __EMX__
 198 #define strcasecmp stricmp
 199 #define strncasecmp strnicmp
 200 #endif
 201
 202 // This declaration is missing in SunOS!
 203 // (Yes, I know it is NOT ANSI-C but its in BSD libc)
 204 #if defined(__xlC) || defined(__AIX__) || defined(__GNUG__)
 205 extern "C"
 206 {
 207   int strcasecmp (const char *, const char *);
 208   int strncasecmp (const char *, const char *, size_t);
 209 }
 210 #endif
 211 #endif  /* __WXMSW__ */
 212
 213 #ifdef __WXPM__
 214 #define strcasecmp stricmp
 215 #define strncasecmp strnicmp
 216 #endif
 217
 218 wxChar *
 219 copystring (const wxChar *s)
 220 {
 221   if (s == NULL) s = wxT("");
 222   size_t len = wxStrlen (s) + 1;
 223
 224   wxChar *news = new wxChar[len];
 225   memcpy (news, s, len * sizeof(wxChar));    // Should be the fastest
 226
 227   return news;
 228 }
 229
 230 // Id generation
 231 static long wxCurrentId = 100;
 232
 233 long
 234 wxNewId (void)
 235 {
 236   return wxCurrentId++;
 237 }
 238
 239 long
 240 wxGetCurrentId(void) { return wxCurrentId; }
 241
 242 void
 243 wxRegisterId (long id)
 244 {
 245   if (id >= wxCurrentId)
 246     wxCurrentId = id + 1;
 247 }
 248
 249 void
 250 StringToFloat (wxChar *s, float *number)
 251 {
 252   if (s && *s && number)
 253     *number = (float) wxStrtod (s, (wxChar **) NULL);
 254 }
 255
 256 void
 257 StringToDouble (wxChar *s, double *number)
 258 {
 259   if (s && *s && number)
 260     *number = wxStrtod (s, (wxChar **) NULL);
 261 }
 262
 263 wxChar *
 264 FloatToString (float number, const wxChar *fmt)
 265 {
 266   static wxChar buf[256];
 267
 268 //  sprintf (buf, "%.2f", number);
 269   wxSprintf (buf, fmt, number);
 270   return buf;
 271 }
 272
 273 wxChar *
 274 DoubleToString (double number, const wxChar *fmt)
 275 {
 276   static wxChar buf[256];
 277
 278   wxSprintf (buf, fmt, number);
 279   return buf;
 280 }
 281
 282 void
 283 StringToInt (wxChar *s, int *number)
 284 {
 285   if (s && *s && number)
 286     *number = (int) wxStrtol (s, (wxChar **) NULL, 10);
 287 }
 288
 289 void
 290 StringToLong (wxChar *s, long *number)
 291 {
 292   if (s && *s && number)
 293     *number = wxStrtol (s, (wxChar **) NULL, 10);
 294 }
 295
 296 wxChar *
 297 IntToString (int number)
 298 {
 299   static wxChar buf[20];
 300
 301   wxSprintf (buf, wxT("%d"), number);
 302   return buf;
 303 }
 304
 305 wxChar *
 306 LongToString (long number)
 307 {
 308   static wxChar buf[20];
 309
 310   wxSprintf (buf, wxT("%ld"), number);
 311   return buf;
 312 }
 313
 314 // Array used in DecToHex conversion routine.
 315 static wxChar hexArray[] = wxT("0123456789ABCDEF");
 316
 317 // Convert 2-digit hex number to decimal
 318 int wxHexToDec(const wxString& buf)
 319 {
 320   int firstDigit, secondDigit;
 321
 322   if (buf.GetChar(0) >= wxT('A'))
 323     firstDigit = buf.GetChar(0) - wxT('A') + 10;
 324   else
 325     firstDigit = buf.GetChar(0) - wxT('0');
 326
 327   if (buf.GetChar(1) >= wxT('A'))
 328     secondDigit = buf.GetChar(1) - wxT('A') + 10;
 329   else
 330     secondDigit = buf.GetChar(1) - wxT('0');
 331
 332   return firstDigit * 16 + secondDigit;
 333 }
 334
 335 // Convert decimal integer to 2-character hex string
 336 void wxDecToHex(int dec, wxChar *buf)
 337 {
 338   int firstDigit = (int)(dec/16.0);
 339   int secondDigit = (int)(dec - (firstDigit*16.0));
 340   buf[0] = hexArray[firstDigit];
 341   buf[1] = hexArray[secondDigit];
 342   buf[2] = 0;
 343 }
 344
 345 // Convert decimal integer to 2-character hex string
 346 wxString wxDecToHex(int dec)
 347 {
 348     wxChar buf[3];
 349     wxDecToHex(dec, buf);
 350     return wxString(buf);
 351 }
 352
 353 // Match a string INDEPENDENT OF CASE
 354 bool
 355 StringMatch (char *str1, char *str2, bool subString, bool exact)
 356 {
 357   if (str1 == NULL || str2 == NULL)
 358     return FALSE;
 359   if (str1 == str2)
 360     return TRUE;
 361
 362   if (subString)
 363     {
 364       int len1 = strlen (str1);
 365       int len2 = strlen (str2);
 366       int i;
 367
 368       // Search for str1 in str2
 369       // Slow .... but acceptable for short strings
 370       for (i = 0; i <= len2 - len1; i++)
 371         {
 372           if (strncasecmp (str1, str2 + i, len1) == 0)
 373             return TRUE;
 374         }
 375     }
 376   else if (exact)
 377     {
 378       if (strcasecmp (str1, str2) == 0)
 379         return TRUE;
 380     }
 381   else
 382     {
 383       int len1 = strlen (str1);
 384       int len2 = strlen (str2);
 385
 386       if (strncasecmp (str1, str2, wxMin (len1, len2)) == 0)
 387         return TRUE;
 388     }
 389
 390   return FALSE;
 391 }
 392
 393 // Return the current date/time
 394 // [volatile]
 395 wxString wxNow()
 396 {
 397   time_t now = time((time_t *) NULL);
 398   char *date = ctime(&now);
 399   date[24] = '\0';
 400   return wxString(date);
 401 }
 402
 403 #if wxUSE_GUI
 404
 405 // ----------------------------------------------------------------------------
 406 // Menu accelerators related functions
 407 // ----------------------------------------------------------------------------
 408
 409 wxChar *wxStripMenuCodes (wxChar *in, wxChar *out)
 410 {
 411   if (!in)
 412     return (wxChar *) NULL;
 413
 414   if (!out)
 415     out = copystring(in);
 416
 417   wxChar *tmpOut = out;
 418
 419   while (*in)
 420     {
 421       if (*in == wxT('&'))
 422         {
 423           // Check && -> &, &x -> x
 424           if (*++in == wxT('&'))
 425             *out++ = *in++;
 426         }
 427       else if (*in == wxT('\t'))
 428         {
 429           // Remove all stuff after \t in X mode, and let the stuff as is
 430           // in Windows mode.
 431           // Accelerators are handled in wx_item.cc for Motif, and are not
 432           // YET supported in XView
 433           break;
 434         }
 435       else
 436         *out++ = *in++;
 437     }                                // while
 438
 439   *out = wxT('\0');
 440
 441   return tmpOut;
 442 }
 443
 444 wxString wxStripMenuCodes(const wxString& str)
 445 {
 446     wxChar *buf = new wxChar[str.Length() + 1];
 447     wxStripMenuCodes(WXSTRINGCAST str, buf);
 448     wxString str1(buf);
 449     delete[] buf;
 450     return str1;
 451 }
 452
 453 #if wxUSE_ACCEL
 454
 455 // return wxAcceleratorEntry for the given menu string or NULL if none
 456 // specified
 457 wxAcceleratorEntry *wxGetAccelFromString(const wxString& label)
 458 {
 459     // check for accelerators: they are given after '\t'
 460     int posTab = label.Find(wxT('\t'));
 461     if ( posTab != wxNOT_FOUND ) {
 462         // parse the accelerator string
 463         int keyCode = 0;
 464         int accelFlags = wxACCEL_NORMAL;
 465         wxString current;
 466         for ( size_t n = (size_t)posTab + 1; n < label.Len(); n++ ) {
 467             if ( (label[n] == '+') || (label[n] == '-') ) {
 468                 if ( current == _("ctrl") )
 469                     accelFlags |= wxACCEL_CTRL;
 470                 else if ( current == _("alt") )
 471                     accelFlags |= wxACCEL_ALT;
 472                 else if ( current == _("shift") )
 473                     accelFlags |= wxACCEL_SHIFT;
 474                 else {
 475                     wxLogDebug(wxT("Unknown accel modifier: '%s'"),
 476                                current.c_str());
 477                 }
 478
 479                 current.Empty();
 480             }
 481             else {
 482                 current += wxTolower(label[n]);
 483             }
 484         }
 485
 486         if ( current.IsEmpty() ) {
 487             wxLogDebug(wxT("No accel key found, accel string ignored."));
 488         }
 489         else {
 490             if ( current.Len() == 1 ) {
 491                 // it's a letter
 492                 keyCode = wxToupper(current[0U]);
 493             }
 494             else {
 495                 // is it a function key?
 496                 if ( current[0U] == 'f' && isdigit(current[1U]) &&
 497                      (current.Len() == 2 ||
 498                      (current.Len() == 3 && isdigit(current[2U]))) ) {
 499                     int n;
 500                     wxSscanf(current.c_str() + 1, wxT("%d"), &n);
 501
 502                     keyCode = WXK_F1 + n - 1;
 503                 }
 504                 else {
 505                     // several special cases
 506                     current.MakeUpper();
 507                     if ( current == wxT("DEL") ) {
 508                         keyCode = WXK_DELETE;
 509                     }
 510                     else if ( current == wxT("DELETE") ) {
 511                         keyCode = WXK_DELETE;
 512                     }
 513                     else if ( current == wxT("INS") ) {
 514                         keyCode = WXK_INSERT;
 515                     }
 516                     else if ( current == wxT("INSERT") ) {
 517                         keyCode = WXK_INSERT;
 518                     }
 519 #if 0
 520                     else if ( current == wxT("PGUP") ) {
 521                         keyCode = VK_PRIOR;
 522                     }
 523                     else if ( current == wxT("PGDN") ) {
 524                         keyCode = VK_NEXT;
 525                     }
 526 #endif
 527                     else
 528                     {
 529                         wxLogDebug(wxT("Unrecognized accel key '%s', accel string ignored."),
 530                                    current.c_str());
 531                     }
 532                 }
 533             }
 534         }
 535
 536         if ( keyCode ) {
 537             // we do have something
 538             return new wxAcceleratorEntry(accelFlags, keyCode);
 539         }
 540     }
 541
 542     return (wxAcceleratorEntry *)NULL;
 543 }
 544
 545 #endif // wxUSE_ACCEL
 546
 547 // ----------------------------------------------------------------------------
 548 // Window search functions
 549 // ----------------------------------------------------------------------------
 550
 551 /*
 552  * If parent is non-NULL, look through children for a label or title
 553  * matching the specified string. If NULL, look through all top-level windows.
 554  *
 555  */
 556
 557 wxWindow *
 558 wxFindWindowByLabel (const wxString& title, wxWindow * parent)
 559 {
 560     if (parent)
 561     {
 562         return wxFindWindowByLabel1(title, parent);
 563     }
 564     else
 565     {
 566         for ( wxWindowList::Node * node = wxTopLevelWindows.GetFirst();
 567               node;
 568               node = node->GetNext() )
 569         {
 570             wxWindow *win = node->GetData();
 571             wxWindow *retwin = wxFindWindowByLabel1 (title, win);
 572             if (retwin)
 573                 return retwin;
 574         }                        // for()
 575
 576     }
 577     return (wxWindow *) NULL;
 578 }
 579
 580 // Recursive
 581 static wxWindow *
 582 wxFindWindowByLabel1 (const wxString& title, wxWindow * parent)
 583 {
 584     if (parent)
 585     {
 586         if (parent->GetLabel() == title)
 587             return parent;
 588     }
 589
 590     if (parent)
 591     {
 592         for ( wxWindowList::Node * node = parent->GetChildren().GetFirst();
 593               node;
 594               node = node->GetNext() )
 595         {
 596             wxWindow *win = (wxWindow *)node->GetData();
 597             wxWindow *retwin = wxFindWindowByLabel1 (title, win);
 598             if (retwin)
 599                 return retwin;
 600         }
 601
 602     }
 603
 604     return (wxWindow *) NULL;                        // Not found
 605 }
 606
 607 /*
 608  * If parent is non-NULL, look through children for a name
 609  * matching the specified string. If NULL, look through all top-level windows.
 610  *
 611  */
 612
 613 wxWindow *
 614 wxFindWindowByName (const wxString& title, wxWindow * parent)
 615 {
 616     if (parent)
 617     {
 618         return wxFindWindowByName1 (title, parent);
 619     }
 620     else
 621     {
 622         for ( wxWindowList::Node * node = wxTopLevelWindows.GetFirst();
 623               node;
 624               node = node->GetNext() )
 625         {
 626             wxWindow *win = node->GetData();
 627             wxWindow *retwin = wxFindWindowByName1 (title, win);
 628             if (retwin)
 629                 return retwin;
 630         }
 631
 632     }
 633
 634     // Failed? Try by label instead.
 635     return wxFindWindowByLabel(title, parent);
 636 }
 637
 638 // Recursive
 639 static wxWindow *
 640 wxFindWindowByName1 (const wxString& title, wxWindow * parent)
 641 {
 642   if (parent)
 643     {
 644             if ( parent->GetName() == title )
 645                         return parent;
 646     }
 647
 648   if (parent)
 649     {
 650       for (wxNode * node = parent->GetChildren().First (); node; node = node->Next ())
 651         {
 652           wxWindow *win = (wxWindow *) node->Data ();
 653           wxWindow *retwin = wxFindWindowByName1 (title, win);
 654           if (retwin)
 655             return retwin;
 656         }                        // for()
 657
 658     }
 659
 660   return (wxWindow *) NULL;                        // Not found
 661
 662 }
 663
 664 // Returns menu item id or -1 if none.
 665 int
 666 wxFindMenuItemId (wxFrame * frame, const wxString& menuString, const wxString& itemString)
 667 {
 668   wxMenuBar *menuBar = frame->GetMenuBar ();
 669   if (!menuBar)
 670     return -1;
 671   return menuBar->FindMenuItem (menuString, itemString);
 672 }
 673
 674 // Try to find the deepest child that contains 'pt'.
 675 // We go backwards, to try to allow for controls that are spacially
 676 // within other controls, but are still siblings (e.g. buttons within
 677 // static boxes). Static boxes are likely to be created _before_ controls
 678 // that sit inside them.
 679 wxWindow* wxFindWindowAtPoint(wxWindow* win, const wxPoint& pt)
 680 {
 681     if (!win->IsShown())
 682         return NULL;
 683
 684     // Hack for wxNotebook case: at least in wxGTK, all pages
 685     // claim to be shown, so we must only deal with the selected one.
 686     if (win->IsKindOf(CLASSINFO(wxNotebook)))
 687     {
 688       wxNotebook* nb = (wxNotebook*) win;
 689       int sel = nb->GetSelection();
 690       if (sel >= 0)
 691       {
 692         wxWindow* child = nb->GetPage(sel);
 693         wxWindow* foundWin = wxFindWindowAtPoint(child, pt);
 694         if (foundWin)
 695            return foundWin;
 696       }
 697     }
 698     /* Doesn't work
 699     // Frame case
 700     else if (win->IsKindOf(CLASSINFO(wxFrame)))
 701     {
 702       // Pseudo-children that may not be mentioned in the child list
 703       wxWindowList extraChildren;
 704       wxFrame* frame = (wxFrame*) win;
 705       if (frame->GetStatusBar())
 706         extraChildren.Append(frame->GetStatusBar());
 707       if (frame->GetToolBar())
 708         extraChildren.Append(frame->GetToolBar());
 709
 710       wxNode* node = extraChildren.First();
 711       while (node)
 712       {
 713           wxWindow* child = (wxWindow*) node->Data();
 714           wxWindow* foundWin = wxFindWindowAtPoint(child, pt);
 715           if (foundWin)
 716             return foundWin;
 717           node = node->Next();
 718       }
 719     }
 720     */
 721
 722     wxNode* node = win->GetChildren().Last();
 723     while (node)
 724     {
 725         wxWindow* child = (wxWindow*) node->Data();
 726         wxWindow* foundWin = wxFindWindowAtPoint(child, pt);
 727         if (foundWin)
 728           return foundWin;
 729         node = node->Previous();
 730     }
 731
 732     wxPoint pos = win->GetPosition();
 733     wxSize sz = win->GetSize();
 734     if (win->GetParent())
 735     {
 736         pos = win->GetParent()->ClientToScreen(pos);
 737     }
 738
 739     wxRect rect(pos, sz);
 740     if (rect.Inside(pt))
 741         return win;
 742     else
 743         return NULL;
 744 }
 745
 746 wxWindow* wxGenericFindWindowAtPoint(const wxPoint& pt)
 747 {
 748     // Go backwards through the list since windows
 749     // on top are likely to have been appended most
 750     // recently.
 751     wxNode* node = wxTopLevelWindows.Last();
 752     while (node)
 753     {
 754         wxWindow* win = (wxWindow*) node->Data();
 755         wxWindow* found = wxFindWindowAtPoint(win, pt);
 756         if (found)
 757             return found;
 758         node = node->Previous();
 759     }
 760     return NULL;
 761 }
 762
 763 #endif // wxUSE_GUI
 764
 765 /*
 766 On Fri, 21 Jul 1995, Paul Craven wrote:
 767
 768 > Is there a way to find the path of running program's executable? I can get
 769 > my home directory, and the current directory, but I don't know how to get the
 770 > executable directory.
 771 >
 772
 773 The code below (warty as it is), does what you want on most Unix,
 774 DOS, and Mac platforms (it's from the ALS Prolog main).
 775
 776 || Ken Bowen      Applied Logic Systems, Inc.         PO Box 180,
 777 ||====            Voice:  +1 (617)965-9191            Newton Centre,
 778 ||                FAX:    +1 (617)965-1636            MA  02159  USA
 779                   Email:  ken@als.com        WWW: http://www.als.com
 780 ------------------------------------------------------------------------
 781 */
 782
 783 // This code is commented out but it may be integrated with wxWin at
 784 // a later date, after testing. Thanks Ken!
 785 #if 0
 786
 787 /*--------------------------------------------------------------------*
 788  | whereami is given a filename f in the form:  whereami(argv[0])
 789  | It returns the directory in which the executable file (containing
 790  | this code [main.c] ) may be found.  A dot will be returned to indicate
 791  | the current directory.
 792  *--------------------------------------------------------------------*/
 793
 794 static void
 795 whereami(name)
 796     char *name;
 797 {
 798     register char *cutoff = NULL;        /* stifle -Wall */
 799     register char *s;
 800     register char *t;
 801     int   cc;
 802     char  ebuf[4096];
 803
 804     /*
 805      * See if the file is accessible either through the current directory
 806      * or through an absolute path.
 807      */
 808
 809     if (access(name, R_OK) == 0) {
 810
 811         /*-------------------------------------------------------------*
 812          * The file was accessible without any other work.  But the current
 813          * working directory might change on us, so if it was accessible
 814          * through the cwd, then we should get it for later accesses.
 815          *-------------------------------------------------------------*/
 816
 817         t = imagedir;
 818         if (!absolute_pathname(name)) {
 819 #if defined(DOS) || defined(__WIN32__)
 820             int   drive;
 821             char *newrbuf;
 822
 823             newrbuf = imagedir;
 824 #ifndef __DJGPP__
 825             if (*(name + 1) == ':') {
 826                 if (*name >= 'a' && *name <= 'z')
 827                     drive = (int) (*name - 'a' + 1);
 828                 else
 829                     drive = (int) (*name - 'A' + 1);
 830                 *newrbuf++ = *name;
 831                 *newrbuf++ = *(name + 1);
 832                 *newrbuf++ = DIR_SEPARATOR;
 833             }
 834             else {
 835                 drive = 0;
 836                 *newrbuf++ = DIR_SEPARATOR;
 837             }
 838             if (getcwd(newrbuf, drive) == 0) {        /* } */
 839 #else
 840             if (getcwd(newrbuf, 1024) == 0) {        /* } */
 841 #endif
 842 #else  /* DOS */
 843 #ifdef HAVE_GETWD
 844             if (getwd(imagedir) == 0) {                /* } */
 845 #else  /* !HAVE_GETWD */
 846             if (getcwd(imagedir, 1024) == 0) {
 847 #endif /* !HAVE_GETWD */
 848 #endif /* DOS */
 849                 fatal_error(FE_GETCWD, 0);
 850             }
 851             for (; *t; t++)        /* Set t to end of buffer */
 852                 ;
 853             if (*(t - 1) == DIR_SEPARATOR)        /* leave slash if already
 854                                                  * last char
 855                                                  */
 856                 cutoff = t - 1;
 857             else {
 858                 cutoff = t;        /* otherwise put one in */
 859                 *t++ = DIR_SEPARATOR;
 860             }
 861         }
 862 #if (!defined(__MAC__) && !defined(__DJGPP__) && !defined(__GO32__) && !defined(__WIN32__))
 863         else
 864                 (*t++ = DIR_SEPARATOR);
 865 #endif
 866
 867         /*-------------------------------------------------------------*
 868          * Copy the rest of the string and set the cutoff if it was not
 869          * already set.  If the first character of name is a slash, cutoff
 870          * is not presently set but will be on the first iteration of the
 871          * loop below.
 872          *-------------------------------------------------------------*/
 873
 874         for ((*name == DIR_SEPARATOR ? (s = name+1) : (s = name));;) {
 875             if (*s == DIR_SEPARATOR)
 876                         cutoff = t;
 877             if (!(*t++ = *s++))
 878                         break;
 879         }
 880
 881     }
 882     else {
 883
 884         /*-------------------------------------------------------------*
 885          * Get the path list from the environment.  If the path list is
 886          * inaccessible for any reason, leave with fatal error.
 887          *-------------------------------------------------------------*/
 888
 889 #ifdef __MAC__
 890         if ((s = getenv("Commands")) == (char *) 0)
 891 #else
 892         if ((s = getenv("PATH")) == (char *) 0)
 893 #endif
 894             fatal_error(FE_PATH, 0);
 895
 896         /*
 897          * Copy path list into ebuf and set the source pointer to the
 898          * beginning of this buffer.
 899          */
 900
 901         strcpy(ebuf, s);
 902         s = ebuf;
 903
 904         for (;;) {
 905             t = imagedir;
 906             while (*s && *s != PATH_SEPARATOR)
 907                 *t++ = *s++;
 908             if (t > imagedir && *(t - 1) == DIR_SEPARATOR)
 909                 ;                /* do nothing -- slash already is in place */
 910             else
 911                 *t++ = DIR_SEPARATOR;        /* put in the slash */
 912             cutoff = t - 1;        /* set cutoff */
 913             strcpy(t, name);
 914             if (access(imagedir, R_OK) == 0)
 915                 break;
 916
 917             if (*s)
 918                 s++;                /* advance source pointer */
 919             else
 920                 fatal_error(FE_INFND, 0);
 921         }
 922
 923     }
 924
 925     /*-------------------------------------------------------------*
 926      | At this point the full pathname should exist in imagedir and
 927      | cutoff should be set to the final slash.  We must now determine
 928      | whether the file name is a symbolic link or not and chase it down
 929      | if it is.  Note that we reuse ebuf for getting the link.
 930      *-------------------------------------------------------------*/
 931
 932 #ifdef HAVE_SYMLINK
 933     while ((cc = readlink(imagedir, ebuf, 512)) != -1) {
 934         ebuf[cc] = 0;
 935         s = ebuf;
 936         if (*s == DIR_SEPARATOR) {
 937             t = imagedir;
 938         }
 939         else {
 940             t = cutoff + 1;
 941         }
 942         for (;;) {
 943             if (*s == DIR_SEPARATOR)
 944                 cutoff = t;        /* mark the last slash seen */
 945             if (!(*t++ = *s++))        /* copy the character */
 946                 break;
 947         }
 948     }
 949
 950 #endif /* HAVE_SYMLINK */
 951
 952     strcpy(imagename, cutoff + 1);        /* keep the image name */
 953     *(cutoff + 1) = 0;                /* chop off the filename part */
 954 }
 955
 956 #endif
 957
 958 #if wxUSE_GUI
 959
 960 // ----------------------------------------------------------------------------
 961 // GUI helpers
 962 // ----------------------------------------------------------------------------
 963
 964 /*
 965  * N.B. these convenience functions must be separate from msgdlgg.cpp, textdlgg.cpp
 966  * since otherwise the generic code may be pulled in unnecessarily.
 967  */
 968
 969 int wxMessageBox(const wxString& message, const wxString& caption, long style,
 970                  wxWindow *parent, int WXUNUSED(x), int WXUNUSED(y) )
 971 {
 972     wxMessageDialog dialog(parent, message, caption, style);
 973
 974     int ans = dialog.ShowModal();
 975     switch ( ans )
 976     {
 977         case wxID_OK:
 978             return wxOK;
 979         case wxID_YES:
 980             return wxYES;
 981         case wxID_NO:
 982             return wxNO;
 983         case wxID_CANCEL:
 984             return wxCANCEL;
 985     }
 986
 987     wxFAIL_MSG( _T("unexpected return code from wxMessageDialog") );
 988
 989     return wxCANCEL;
 990 }
 991
 992 #if wxUSE_TEXTDLG
 993 wxString wxGetTextFromUser(const wxString& message, const wxString& caption,
 994                         const wxString& defaultValue, wxWindow *parent,
 995                         int x, int y, bool WXUNUSED(centre) )
 996 {
 997     wxString str;
 998     wxTextEntryDialog dialog(parent, message, caption, defaultValue, wxOK|wxCANCEL, wxPoint(x, y));
 999     if (dialog.ShowModal() == wxID_OK)
1000     {
1001         str = dialog.GetValue();
1002     }
1003
1004     return str;
1005 }
1006
1007 wxString wxGetPasswordFromUser(const wxString& message,
1008                                const wxString& caption,
1009                                const wxString& defaultValue,
1010                                wxWindow *parent)
1011 {
1012     wxString str;
1013     wxTextEntryDialog dialog(parent, message, caption, defaultValue,
1014                              wxOK | wxCANCEL | wxTE_PASSWORD);
1015     if ( dialog.ShowModal() == wxID_OK )
1016     {
1017         str = dialog.GetValue();
1018     }
1019
1020     return str;
1021 }
1022
1023 #endif // wxUSE_TEXTDLG
1024
1025 wxColour wxGetColourFromUser(wxWindow *parent, const wxColour& colInit)
1026 {
1027       wxColourData data;
1028       data.SetChooseFull(TRUE);
1029       if ( colInit.Ok() )
1030       {
1031           data.SetColour((wxColour &)colInit); // const_cast
1032       }
1033
1034       wxColour colRet;
1035       wxColourDialog dialog(parent, &data);
1036       if ( dialog.ShowModal() == wxID_OK )
1037       {
1038           colRet = dialog.GetColourData().GetColour();
1039       }
1040       //else: leave it invalid
1041
1042       return colRet;
1043 }
1044
1045 // ----------------------------------------------------------------------------
1046 // missing C RTL functions (FIXME shouldn't be here at all)
1047 // ----------------------------------------------------------------------------
1048
1049 #ifdef __MWERKS__
1050 char *strdup(const char *s)
1051 {
1052         return strcpy( (char*) malloc( strlen( s ) + 1 ) , s ) ;
1053 }
1054
1055 int isascii( int c )
1056 {
1057         return ( c >= 0 && c < 128 ) ;
1058 }
1059 #endif // __MWERKS__
1060
1061 // ----------------------------------------------------------------------------
1062 // wxSafeYield and supporting functions
1063 // ----------------------------------------------------------------------------
1064
1065 void wxEnableTopLevelWindows(bool enable)
1066 {
1067     wxWindowList::Node *node;
1068     for ( node = wxTopLevelWindows.GetFirst(); node; node = node->GetNext() )
1069         node->GetData()->Enable(enable);
1070 }
1071
1072 wxWindowDisabler::wxWindowDisabler(wxWindow *winToSkip)
1073 {
1074     // remember the top level windows which were already disabled, so that we
1075     // don't reenable them later
1076     m_winDisabled = NULL;
1077
1078     wxWindowList::Node *node;
1079     for ( node = wxTopLevelWindows.GetFirst(); node; node = node->GetNext() )
1080     {
1081         wxWindow *winTop = node->GetData();
1082         if ( winTop == winToSkip )
1083             continue;
1084
1085         if ( winTop->IsEnabled() )
1086         {
1087             winTop->Disable();
1088         }
1089         else
1090         {
1091             if ( !m_winDisabled )
1092             {
1093                 m_winDisabled = new wxWindowList;
1094             }
1095
1096             m_winDisabled->Append(winTop);
1097         }
1098     }
1099 }
1100
1101 wxWindowDisabler::~wxWindowDisabler()
1102 {
1103     wxWindowList::Node *node;
1104     for ( node = wxTopLevelWindows.GetFirst(); node; node = node->GetNext() )
1105     {
1106         wxWindow *winTop = node->GetData();
1107         if ( !m_winDisabled || !m_winDisabled->Find(winTop) )
1108         {
1109             winTop->Enable();
1110         }
1111         //else: had been already disabled, don't reenable
1112     }
1113
1114     delete m_winDisabled;
1115 }
1116
1117 // Yield to other apps/messages and disable user input to all windows except
1118 // the given one
1119 bool wxSafeYield(wxWindow *win)
1120 {
1121     wxWindowDisabler wd(win);
1122
1123     bool rc = wxYield();
1124
1125     return rc;
1126 }
1127
1128 // ----------------------------------------------------------------------------
1129 // misc functions
1130 // ----------------------------------------------------------------------------
1131
1132 // Don't synthesize KeyUp events holding down a key and producing KeyDown
1133 // events with autorepeat. On by default and always on in wxMSW. wxGTK version
1134 // in utilsgtk.cpp.
1135 #ifndef __WXGTK__
1136 bool wxSetDetectableAutoRepeat( bool WXUNUSED(flag) )
1137 {
1138     return TRUE;    // detectable auto-repeat is the only mode MSW supports
1139 }
1140 #endif // !wxGTK
1141
1142 #endif // wxUSE_GUI
1143
1144 // ----------------------------------------------------------------------------
1145 // network and user id functions
1146 // ----------------------------------------------------------------------------
1147
1148 // Get Full RFC822 style email address
1149 bool wxGetEmailAddress(wxChar *address, int maxSize)
1150 {
1151     wxString email = wxGetEmailAddress();
1152     if ( !email )
1153         return FALSE;
1154
1155     wxStrncpy(address, email, maxSize - 1);
1156     address[maxSize - 1] = wxT('\0');
1157
1158     return TRUE;
1159 }
1160
1161 wxString wxGetEmailAddress()
1162 {
1163     wxString email;
1164
1165     wxString host = wxGetFullHostName();
1166     if ( !!host )
1167     {
1168         wxString user = wxGetUserId();
1169         if ( !!user )
1170         {
1171             email << user << wxT('@') << host;
1172         }
1173     }
1174
1175     return email;
1176 }
1177
1178 wxString wxGetUserId()
1179 {
1180     static const int maxLoginLen = 256; // FIXME arbitrary number
1181
1182     wxString buf;
1183     bool ok = wxGetUserId(buf.GetWriteBuf(maxLoginLen), maxLoginLen);
1184     buf.UngetWriteBuf();
1185
1186     if ( !ok )
1187         buf.Empty();
1188
1189     return buf;
1190 }
1191
1192 wxString wxGetUserName()
1193 {
1194     static const int maxUserNameLen = 1024; // FIXME arbitrary number
1195
1196     wxString buf;
1197     bool ok = wxGetUserName(buf.GetWriteBuf(maxUserNameLen), maxUserNameLen);
1198     buf.UngetWriteBuf();
1199
1200     if ( !ok )
1201         buf.Empty();
1202
1203     return buf;
1204 }
1205
1206 wxString wxGetHostName()
1207 {
1208     static const size_t hostnameSize = 257;
1209
1210     wxString buf;
1211     bool ok = wxGetHostName(buf.GetWriteBuf(hostnameSize), hostnameSize);
1212
1213     buf.UngetWriteBuf();
1214
1215     if ( !ok )
1216         buf.Empty();
1217
1218     return buf;
1219 }
1220
1221 wxString wxGetFullHostName()
1222 {
1223     static const size_t hostnameSize = 257;
1224
1225     wxString buf;
1226     bool ok = wxGetFullHostName(buf.GetWriteBuf(hostnameSize), hostnameSize);
1227
1228     buf.UngetWriteBuf();
1229
1230     if ( !ok )
1231         buf.Empty();
1232
1233     return buf;
1234 }
1235
1236 wxString wxGetHomeDir()
1237 {
1238     wxString home;
1239     wxGetHomeDir(&home);
1240
1241     return home;
1242 }
1243
1244 #if 0
1245
1246 wxString wxGetCurrentDir()
1247 {
1248     wxString dir;
1249     size_t len = 1024;
1250     bool ok;
1251     do
1252     {
1253         ok = getcwd(dir.GetWriteBuf(len + 1), len) != NULL;
1254         dir.UngetWriteBuf();
1255
1256         if ( !ok )
1257         {
1258             if ( errno != ERANGE )
1259             {
1260                 wxLogSysError(_T("Failed to get current directory"));
1261
1262                 return wxEmptyString;
1263             }
1264             else
1265             {
1266                 // buffer was too small, retry with a larger one
1267                 len *= 2;
1268             }
1269         }
1270         //else: ok
1271     } while ( !ok );
1272
1273     return dir;
1274 }
1275
1276 #endif // 0
1277
1278 // ----------------------------------------------------------------------------
1279 // wxExecute
1280 // ----------------------------------------------------------------------------
1281
1282 // this is a private function because it hasn't a clean interface: the first
1283 // array is passed by reference, the second by pointer - instead we have 2
1284 // public versions of wxExecute() below
1285 static long wxDoExecuteWithCapture(const wxString& command,
1286                                    wxArrayString& output,
1287                                    wxArrayString* error)
1288 {
1289 #ifdef __WIN16__
1290     wxFAIL_MSG("Sorry, this version of wxExecute not implemented on WIN16.");
1291
1292     return 0;
1293 #else // !Win16
1294     // create a wxProcess which will capture the output
1295     wxProcess *process = new wxProcess;
1296     process->Redirect();
1297
1298     long rc = wxExecute(command, TRUE /* sync */, process);
1299
1300 #if wxUSE_STREAMS
1301     if ( rc != -1 )
1302     {
1303         wxInputStream* is = process->GetInputStream();
1304         wxCHECK_MSG( is, -1, _T("if wxExecute() succeded, stream can't be NULL") );
1305         wxTextInputStream tis(*is);
1306
1307         wxTextInputStream *tes = NULL;
1308         wxInputStream *es = NULL;
1309         if ( error )
1310         {
1311             es = process->GetErrorStream();
1312
1313             wxCHECK_MSG( es, -1, _T("stderr can't be NULL") );
1314
1315             tes = new wxTextInputStream(*es);
1316         }
1317
1318         bool cont;
1319         do
1320         {
1321             cont = FALSE;
1322
1323             if ( !is->Eof() && is->IsOk() )
1324             {
1325                 wxString line = tis.ReadLine();
1326                 if ( is->LastError() )
1327                     break;
1328
1329                 cont = TRUE;
1330
1331                 output.Add(line);
1332             }
1333
1334             if ( error && !es->Eof() && es->IsOk() )
1335             {
1336                 wxString line = tes->ReadLine();
1337                 if ( es->LastError() )
1338                     break;
1339
1340                 cont = TRUE;
1341
1342                 error->Add(line);
1343             }
1344         }
1345         while ( cont );
1346
1347         delete tes;
1348     }
1349 #endif // wxUSE_STREAMS
1350
1351     delete process;
1352
1353     return rc;
1354 #endif // IO redirection supoprted
1355 }
1356
1357 long wxExecute(const wxString& command, wxArrayString& output)
1358 {
1359     return wxDoExecuteWithCapture(command, output, NULL);
1360 }
1361
1362 long wxExecute(const wxString& command,
1363                wxArrayString& output,
1364                wxArrayString& error)
1365 {
1366     return wxDoExecuteWithCapture(command, output, &error);
1367 }