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