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 #include <ctype.h>
  52 #include <stdio.h>
  53 #include <stdlib.h>
  54 #include <string.h>
  55
  56 #if !defined(__WATCOMC__)
  57     #if !(defined(_MSC_VER) && (_MSC_VER > 800))
  58         #include <errno.h>
  59     #endif
  60 #endif
  61
  62 #if wxUSE_GUI
  63     #include "wx/colordlg.h"
  64 #endif // wxUSE_GUI
  65
  66 #include <time.h>
  67
  68 #ifndef __MWERKS__
  69     #include <sys/types.h>
  70     #include <sys/stat.h>
  71 #endif
  72
  73 #ifdef __SALFORDC__
  74     #include <clib.h>
  75 #endif
  76
  77 #ifdef __WXMSW__
  78     #include "windows.h"
  79 #endif
  80
  81 // ----------------------------------------------------------------------------
  82 // function protoypes
  83 // ----------------------------------------------------------------------------
  84
  85 #if wxUSE_GUI
  86     static wxWindow *wxFindWindowByLabel1(const wxString& title, wxWindow *parent);
  87     static wxWindow *wxFindWindowByName1 (const wxString& title, wxWindow *parent);
  88 #endif // wxUSE_GUI
  89
  90 // ============================================================================
  91 // implementation
  92 // ============================================================================
  93
  94 // ----------------------------------------------------------------------------
  95 // string functions
  96 // ----------------------------------------------------------------------------
  97
  98 #ifdef __WXMAC__
  99 int strcasecmp(const char *str_1, const char *str_2)
 100 {
 101   register char c1, c2;
 102   do {
 103     c1 = tolower(*str_1++);
 104     c2 = tolower(*str_2++);
 105   } while ( c1 && (c1 == c2) );
 106
 107   return c1 - c2;
 108 }
 109
 110 int strncasecmp(const char *str_1, const char *str_2, size_t maxchar)
 111 {
 112
 113   register char c1, c2;
 114   while( maxchar--)
 115   {
 116     c1 = tolower(*str_1++);
 117     c2 = tolower(*str_2++);
 118
 119     if ( !c1 || c1!=c2 )
 120                   return c1 - c2;
 121
 122   } ;
 123
 124   return 0 ;
 125
 126 }
 127 #endif // wxMAC
 128
 129 #if defined( __VMS__ ) && ( __VMS_VER < 70000000 )
 130 // we have no strI functions under VMS, therefore I have implemented
 131 // an inefficient but portable version: convert copies of strings to lowercase
 132 // and then use the normal comparison
 133 static void myLowerString(char *s)
 134 {
 135   while(*s){
 136     if(isalpha(*s)) *s = (char)tolower(*s);
 137     s++;
 138   }
 139 }
 140
 141 int strcasecmp(const char *str_1, const char *str_2)
 142 {
 143   char *temp1 = new char[strlen(str_1)+1];
 144   char *temp2 = new char[strlen(str_2)+1];
 145   strcpy(temp1,str_1);
 146   strcpy(temp2,str_2);
 147   myLowerString(temp1);
 148   myLowerString(temp2);
 149
 150   int result = wxStrcmp(temp1,temp2);
 151   delete[] temp1;
 152   delete[] temp2;
 153
 154   return(result);
 155 }
 156
 157 int strncasecmp(const char *str_1, const char *str_2, size_t maxchar)
 158 {
 159   char *temp1 = new char[strlen(str_1)+1];
 160   char *temp2 = new char[strlen(str_2)+1];
 161   strcpy(temp1,str_1);
 162   strcpy(temp2,str_2);
 163   myLowerString(temp1);
 164   myLowerString(temp2);
 165
 166   int result = strncmp(temp1,temp2,maxchar);
 167   delete[] temp1;
 168   delete[] temp2;
 169
 170   return(result);
 171 }
 172 #endif // __VMS__
 173
 174 #ifdef __WINDOWS__
 175
 176 #ifndef __GNUWIN32__
 177 #ifndef __MWERKS__
 178 #define strcasecmp stricmp
 179 #define strncasecmp strnicmp
 180 #else
 181 #define strcasecmp _stricmp
 182 #define strncasecmp _strnicmp
 183 #endif
 184 #endif
 185
 186 #else
 187
 188 #ifdef __EMX__
 189 #define strcasecmp stricmp
 190 #define strncasecmp strnicmp
 191 #endif
 192
 193 // This declaration is missing in SunOS!
 194 // (Yes, I know it is NOT ANSI-C but its in BSD libc)
 195 #if defined(__xlC) || defined(__AIX__) || defined(__GNUG__)
 196 extern "C"
 197 {
 198   int strcasecmp (const char *, const char *);
 199   int strncasecmp (const char *, const char *, size_t);
 200 }
 201 #endif
 202 #endif  /* __WXMSW__ */
 203
 204 #ifdef __WXPM__
 205 #define strcasecmp stricmp
 206 #define strncasecmp strnicmp
 207 #endif
 208
 209 wxChar *
 210 copystring (const wxChar *s)
 211 {
 212   if (s == NULL) s = wxT("");
 213   size_t len = wxStrlen (s) + 1;
 214
 215   wxChar *news = new wxChar[len];
 216   memcpy (news, s, len * sizeof(wxChar));    // Should be the fastest
 217
 218   return news;
 219 }
 220
 221 // Id generation
 222 static long wxCurrentId = 100;
 223
 224 long
 225 wxNewId (void)
 226 {
 227   return wxCurrentId++;
 228 }
 229
 230 long
 231 wxGetCurrentId(void) { return wxCurrentId; }
 232
 233 void
 234 wxRegisterId (long id)
 235 {
 236   if (id >= wxCurrentId)
 237     wxCurrentId = id + 1;
 238 }
 239
 240 void
 241 StringToFloat (wxChar *s, float *number)
 242 {
 243   if (s && *s && number)
 244     *number = (float) wxStrtod (s, (wxChar **) NULL);
 245 }
 246
 247 void
 248 StringToDouble (wxChar *s, double *number)
 249 {
 250   if (s && *s && number)
 251     *number = wxStrtod (s, (wxChar **) NULL);
 252 }
 253
 254 wxChar *
 255 FloatToString (float number, const wxChar *fmt)
 256 {
 257   static wxChar buf[256];
 258
 259 //  sprintf (buf, "%.2f", number);
 260   wxSprintf (buf, fmt, number);
 261   return buf;
 262 }
 263
 264 wxChar *
 265 DoubleToString (double number, const wxChar *fmt)
 266 {
 267   static wxChar buf[256];
 268
 269   wxSprintf (buf, fmt, number);
 270   return buf;
 271 }
 272
 273 void
 274 StringToInt (wxChar *s, int *number)
 275 {
 276   if (s && *s && number)
 277     *number = (int) wxStrtol (s, (wxChar **) NULL, 10);
 278 }
 279
 280 void
 281 StringToLong (wxChar *s, long *number)
 282 {
 283   if (s && *s && number)
 284     *number = wxStrtol (s, (wxChar **) NULL, 10);
 285 }
 286
 287 wxChar *
 288 IntToString (int number)
 289 {
 290   static wxChar buf[20];
 291
 292   wxSprintf (buf, wxT("%d"), number);
 293   return buf;
 294 }
 295
 296 wxChar *
 297 LongToString (long number)
 298 {
 299   static wxChar buf[20];
 300
 301   wxSprintf (buf, wxT("%ld"), number);
 302   return buf;
 303 }
 304
 305 // Array used in DecToHex conversion routine.
 306 static wxChar hexArray[] = wxT("0123456789ABCDEF");
 307
 308 // Convert 2-digit hex number to decimal
 309 int wxHexToDec(const wxString& buf)
 310 {
 311   int firstDigit, secondDigit;
 312
 313   if (buf.GetChar(0) >= wxT('A'))
 314     firstDigit = buf.GetChar(0) - wxT('A') + 10;
 315   else
 316     firstDigit = buf.GetChar(0) - wxT('0');
 317
 318   if (buf.GetChar(1) >= wxT('A'))
 319     secondDigit = buf.GetChar(1) - wxT('A') + 10;
 320   else
 321     secondDigit = buf.GetChar(1) - wxT('0');
 322
 323   return firstDigit * 16 + secondDigit;
 324 }
 325
 326 // Convert decimal integer to 2-character hex string
 327 void wxDecToHex(int dec, wxChar *buf)
 328 {
 329   int firstDigit = (int)(dec/16.0);
 330   int secondDigit = (int)(dec - (firstDigit*16.0));
 331   buf[0] = hexArray[firstDigit];
 332   buf[1] = hexArray[secondDigit];
 333   buf[2] = 0;
 334 }
 335
 336 // Convert decimal integer to 2-character hex string
 337 wxString wxDecToHex(int dec)
 338 {
 339     wxChar buf[3];
 340     wxDecToHex(dec, buf);
 341     return wxString(buf);
 342 }
 343
 344 // Match a string INDEPENDENT OF CASE
 345 bool
 346 StringMatch (char *str1, char *str2, bool subString, bool exact)
 347 {
 348   if (str1 == NULL || str2 == NULL)
 349     return FALSE;
 350   if (str1 == str2)
 351     return TRUE;
 352
 353   if (subString)
 354     {
 355       int len1 = strlen (str1);
 356       int len2 = strlen (str2);
 357       int i;
 358
 359       // Search for str1 in str2
 360       // Slow .... but acceptable for short strings
 361       for (i = 0; i <= len2 - len1; i++)
 362         {
 363           if (strncasecmp (str1, str2 + i, len1) == 0)
 364             return TRUE;
 365         }
 366     }
 367   else if (exact)
 368     {
 369       if (strcasecmp (str1, str2) == 0)
 370         return TRUE;
 371     }
 372   else
 373     {
 374       int len1 = strlen (str1);
 375       int len2 = strlen (str2);
 376
 377       if (strncasecmp (str1, str2, wxMin (len1, len2)) == 0)
 378         return TRUE;
 379     }
 380
 381   return FALSE;
 382 }
 383
 384 // Return the current date/time
 385 // [volatile]
 386 wxString wxNow()
 387 {
 388   time_t now = time((time_t *) NULL);
 389   char *date = ctime(&now);
 390   date[24] = '\0';
 391   return wxString(date);
 392 }
 393
 394 #if wxUSE_GUI
 395
 396 // ----------------------------------------------------------------------------
 397 // Menu accelerators related functions
 398 // ----------------------------------------------------------------------------
 399
 400 wxChar *wxStripMenuCodes (wxChar *in, wxChar *out)
 401 {
 402   if (!in)
 403     return (wxChar *) NULL;
 404
 405   if (!out)
 406     out = copystring(in);
 407
 408   wxChar *tmpOut = out;
 409
 410   while (*in)
 411     {
 412       if (*in == wxT('&'))
 413         {
 414           // Check && -> &, &x -> x
 415           if (*++in == wxT('&'))
 416             *out++ = *in++;
 417         }
 418       else if (*in == wxT('\t'))
 419         {
 420           // Remove all stuff after \t in X mode, and let the stuff as is
 421           // in Windows mode.
 422           // Accelerators are handled in wx_item.cc for Motif, and are not
 423           // YET supported in XView
 424           break;
 425         }
 426       else
 427         *out++ = *in++;
 428     }                                // while
 429
 430   *out = wxT('\0');
 431
 432   return tmpOut;
 433 }
 434
 435 wxString wxStripMenuCodes(const wxString& str)
 436 {
 437     wxChar *buf = new wxChar[str.Length() + 1];
 438     wxStripMenuCodes(WXSTRINGCAST str, buf);
 439     wxString str1(buf);
 440     delete[] buf;
 441     return str1;
 442 }
 443
 444 #if wxUSE_ACCEL
 445
 446 // return wxAcceleratorEntry for the given menu string or NULL if none
 447 // specified
 448 wxAcceleratorEntry *wxGetAccelFromString(const wxString& label)
 449 {
 450     // check for accelerators: they are given after '\t'
 451     int posTab = label.Find(wxT('\t'));
 452     if ( posTab != wxNOT_FOUND ) {
 453         // parse the accelerator string
 454         int keyCode = 0;
 455         int accelFlags = wxACCEL_NORMAL;
 456         wxString current;
 457         for ( size_t n = (size_t)posTab + 1; n < label.Len(); n++ ) {
 458             if ( (label[n] == '+') || (label[n] == '-') ) {
 459                 if ( current == _("ctrl") )
 460                     accelFlags |= wxACCEL_CTRL;
 461                 else if ( current == _("alt") )
 462                     accelFlags |= wxACCEL_ALT;
 463                 else if ( current == _("shift") )
 464                     accelFlags |= wxACCEL_SHIFT;
 465                 else {
 466                     wxLogDebug(wxT("Unknown accel modifier: '%s'"),
 467                                current.c_str());
 468                 }
 469
 470                 current.Empty();
 471             }
 472             else {
 473                 current += wxTolower(label[n]);
 474             }
 475         }
 476
 477         if ( current.IsEmpty() ) {
 478             wxLogDebug(wxT("No accel key found, accel string ignored."));
 479         }
 480         else {
 481             if ( current.Len() == 1 ) {
 482                 // it's a letter
 483                 keyCode = wxToupper(current[0U]);
 484             }
 485             else {
 486                 // is it a function key?
 487                 if ( current[0U] == 'f' && isdigit(current[1U]) &&
 488                      (current.Len() == 2 ||
 489                      (current.Len() == 3 && isdigit(current[2U]))) ) {
 490                     int n;
 491                     wxSscanf(current.c_str() + 1, wxT("%d"), &n);
 492
 493                     keyCode = WXK_F1 + n - 1;
 494                 }
 495                 else {
 496 #if 0 // this is not supported by GTK+, apparently
 497                     // several special cases
 498                     current.MakeUpper();
 499                     if ( current == wxT("DEL") ) {
 500                         keyCode = VK_DELETE;
 501                     }
 502                     else if ( current == wxT("PGUP") ) {
 503                         keyCode = VK_PRIOR;
 504                     }
 505                     else if ( current == wxT("PGDN") ) {
 506                         keyCode = VK_NEXT;
 507                     }
 508                     else
 509 #endif // 0
 510                     {
 511                         wxLogDebug(wxT("Unrecognized accel key '%s', accel "
 512                                        "string ignored."), current.c_str());
 513                     }
 514                 }
 515             }
 516         }
 517
 518         if ( keyCode ) {
 519             // we do have something
 520             return new wxAcceleratorEntry(accelFlags, keyCode);
 521         }
 522     }
 523
 524     return (wxAcceleratorEntry *)NULL;
 525 }
 526
 527 #endif // wxUSE_ACCEL
 528
 529 // ----------------------------------------------------------------------------
 530 // Window search functions
 531 // ----------------------------------------------------------------------------
 532
 533 /*
 534  * If parent is non-NULL, look through children for a label or title
 535  * matching the specified string. If NULL, look through all top-level windows.
 536  *
 537  */
 538
 539 wxWindow *
 540 wxFindWindowByLabel (const wxString& title, wxWindow * parent)
 541 {
 542     if (parent)
 543     {
 544         return wxFindWindowByLabel1(title, parent);
 545     }
 546     else
 547     {
 548         for ( wxWindowList::Node * node = wxTopLevelWindows.GetFirst();
 549               node;
 550               node = node->GetNext() )
 551         {
 552             wxWindow *win = node->GetData();
 553             wxWindow *retwin = wxFindWindowByLabel1 (title, win);
 554             if (retwin)
 555                 return retwin;
 556         }                        // for()
 557
 558     }
 559     return (wxWindow *) NULL;
 560 }
 561
 562 // Recursive
 563 static wxWindow *
 564 wxFindWindowByLabel1 (const wxString& title, wxWindow * parent)
 565 {
 566     if (parent)
 567     {
 568         if (parent->GetLabel() == title)
 569             return parent;
 570     }
 571
 572     if (parent)
 573     {
 574         for ( wxWindowList::Node * node = parent->GetChildren().GetFirst();
 575               node;
 576               node = node->GetNext() )
 577         {
 578             wxWindow *win = (wxWindow *)node->GetData();
 579             wxWindow *retwin = wxFindWindowByLabel1 (title, win);
 580             if (retwin)
 581                 return retwin;
 582         }
 583
 584     }
 585
 586     return (wxWindow *) NULL;                        // Not found
 587 }
 588
 589 /*
 590  * If parent is non-NULL, look through children for a name
 591  * matching the specified string. If NULL, look through all top-level windows.
 592  *
 593  */
 594
 595 wxWindow *
 596 wxFindWindowByName (const wxString& title, wxWindow * parent)
 597 {
 598     if (parent)
 599     {
 600         return wxFindWindowByName1 (title, parent);
 601     }
 602     else
 603     {
 604         for ( wxWindowList::Node * node = wxTopLevelWindows.GetFirst();
 605               node;
 606               node = node->GetNext() )
 607         {
 608             wxWindow *win = node->GetData();
 609             wxWindow *retwin = wxFindWindowByName1 (title, win);
 610             if (retwin)
 611                 return retwin;
 612         }
 613
 614     }
 615
 616     // Failed? Try by label instead.
 617     return wxFindWindowByLabel(title, parent);
 618 }
 619
 620 // Recursive
 621 static wxWindow *
 622 wxFindWindowByName1 (const wxString& title, wxWindow * parent)
 623 {
 624   if (parent)
 625     {
 626             if ( parent->GetName() == title )
 627                         return parent;
 628     }
 629
 630   if (parent)
 631     {
 632       for (wxNode * node = parent->GetChildren().First (); node; node = node->Next ())
 633         {
 634           wxWindow *win = (wxWindow *) node->Data ();
 635           wxWindow *retwin = wxFindWindowByName1 (title, win);
 636           if (retwin)
 637             return retwin;
 638         }                        // for()
 639
 640     }
 641
 642   return (wxWindow *) NULL;                        // Not found
 643
 644 }
 645
 646 // Returns menu item id or -1 if none.
 647 int
 648 wxFindMenuItemId (wxFrame * frame, const wxString& menuString, const wxString& itemString)
 649 {
 650   wxMenuBar *menuBar = frame->GetMenuBar ();
 651   if (!menuBar)
 652     return -1;
 653   return menuBar->FindMenuItem (menuString, itemString);
 654 }
 655
 656 #endif // wxUSE_GUI
 657
 658 /*
 659 On Fri, 21 Jul 1995, Paul Craven wrote:
 660
 661 > Is there a way to find the path of running program's executable? I can get
 662 > my home directory, and the current directory, but I don't know how to get the
 663 > executable directory.
 664 >
 665
 666 The code below (warty as it is), does what you want on most Unix,
 667 DOS, and Mac platforms (it's from the ALS Prolog main).
 668
 669 || Ken Bowen      Applied Logic Systems, Inc.         PO Box 180,
 670 ||====            Voice:  +1 (617)965-9191            Newton Centre,
 671 ||                FAX:    +1 (617)965-1636            MA  02159  USA
 672                   Email:  ken@als.com        WWW: http://www.als.com
 673 ------------------------------------------------------------------------
 674 */
 675
 676 // This code is commented out but it may be integrated with wxWin at
 677 // a later date, after testing. Thanks Ken!
 678 #if 0
 679
 680 /*--------------------------------------------------------------------*
 681  | whereami is given a filename f in the form:  whereami(argv[0])
 682  | It returns the directory in which the executable file (containing
 683  | this code [main.c] ) may be found.  A dot will be returned to indicate
 684  | the current directory.
 685  *--------------------------------------------------------------------*/
 686
 687 static void
 688 whereami(name)
 689     char *name;
 690 {
 691     register char *cutoff = NULL;        /* stifle -Wall */
 692     register char *s;
 693     register char *t;
 694     int   cc;
 695     char  ebuf[4096];
 696
 697     /*
 698      * See if the file is accessible either through the current directory
 699      * or through an absolute path.
 700      */
 701
 702     if (access(name, R_OK) == 0) {
 703
 704         /*-------------------------------------------------------------*
 705          * The file was accessible without any other work.  But the current
 706          * working directory might change on us, so if it was accessible
 707          * through the cwd, then we should get it for later accesses.
 708          *-------------------------------------------------------------*/
 709
 710         t = imagedir;
 711         if (!absolute_pathname(name)) {
 712 #if defined(DOS) || defined(__WIN32__)
 713             int   drive;
 714             char *newrbuf;
 715
 716             newrbuf = imagedir;
 717 #ifndef __DJGPP__
 718             if (*(name + 1) == ':') {
 719                 if (*name >= 'a' && *name <= 'z')
 720                     drive = (int) (*name - 'a' + 1);
 721                 else
 722                     drive = (int) (*name - 'A' + 1);
 723                 *newrbuf++ = *name;
 724                 *newrbuf++ = *(name + 1);
 725                 *newrbuf++ = DIR_SEPARATOR;
 726             }
 727             else {
 728                 drive = 0;
 729                 *newrbuf++ = DIR_SEPARATOR;
 730             }
 731             if (getcwd(newrbuf, drive) == 0) {        /* } */
 732 #else
 733             if (getcwd(newrbuf, 1024) == 0) {        /* } */
 734 #endif
 735 #else  /* DOS */
 736 #ifdef HAVE_GETWD
 737             if (getwd(imagedir) == 0) {                /* } */
 738 #else  /* !HAVE_GETWD */
 739             if (getcwd(imagedir, 1024) == 0) {
 740 #endif /* !HAVE_GETWD */
 741 #endif /* DOS */
 742                 fatal_error(FE_GETCWD, 0);
 743             }
 744             for (; *t; t++)        /* Set t to end of buffer */
 745                 ;
 746             if (*(t - 1) == DIR_SEPARATOR)        /* leave slash if already
 747                                                  * last char
 748                                                  */
 749                 cutoff = t - 1;
 750             else {
 751                 cutoff = t;        /* otherwise put one in */
 752                 *t++ = DIR_SEPARATOR;
 753             }
 754         }
 755 #if (!defined(__MAC__) && !defined(__DJGPP__) && !defined(__GO32__) && !defined(__WIN32__))
 756         else
 757                 (*t++ = DIR_SEPARATOR);
 758 #endif
 759
 760         /*-------------------------------------------------------------*
 761          * Copy the rest of the string and set the cutoff if it was not
 762          * already set.  If the first character of name is a slash, cutoff
 763          * is not presently set but will be on the first iteration of the
 764          * loop below.
 765          *-------------------------------------------------------------*/
 766
 767         for ((*name == DIR_SEPARATOR ? (s = name+1) : (s = name));;) {
 768             if (*s == DIR_SEPARATOR)
 769                         cutoff = t;
 770             if (!(*t++ = *s++))
 771                         break;
 772         }
 773
 774     }
 775     else {
 776
 777         /*-------------------------------------------------------------*
 778          * Get the path list from the environment.  If the path list is
 779          * inaccessible for any reason, leave with fatal error.
 780          *-------------------------------------------------------------*/
 781
 782 #ifdef __MAC__
 783         if ((s = getenv("Commands")) == (char *) 0)
 784 #else
 785         if ((s = getenv("PATH")) == (char *) 0)
 786 #endif
 787             fatal_error(FE_PATH, 0);
 788
 789         /*
 790          * Copy path list into ebuf and set the source pointer to the
 791          * beginning of this buffer.
 792          */
 793
 794         strcpy(ebuf, s);
 795         s = ebuf;
 796
 797         for (;;) {
 798             t = imagedir;
 799             while (*s && *s != PATH_SEPARATOR)
 800                 *t++ = *s++;
 801             if (t > imagedir && *(t - 1) == DIR_SEPARATOR)
 802                 ;                /* do nothing -- slash already is in place */
 803             else
 804                 *t++ = DIR_SEPARATOR;        /* put in the slash */
 805             cutoff = t - 1;        /* set cutoff */
 806             strcpy(t, name);
 807             if (access(imagedir, R_OK) == 0)
 808                 break;
 809
 810             if (*s)
 811                 s++;                /* advance source pointer */
 812             else
 813                 fatal_error(FE_INFND, 0);
 814         }
 815
 816     }
 817
 818     /*-------------------------------------------------------------*
 819      | At this point the full pathname should exist in imagedir and
 820      | cutoff should be set to the final slash.  We must now determine
 821      | whether the file name is a symbolic link or not and chase it down
 822      | if it is.  Note that we reuse ebuf for getting the link.
 823      *-------------------------------------------------------------*/
 824
 825 #ifdef HAVE_SYMLINK
 826     while ((cc = readlink(imagedir, ebuf, 512)) != -1) {
 827         ebuf[cc] = 0;
 828         s = ebuf;
 829         if (*s == DIR_SEPARATOR) {
 830             t = imagedir;
 831         }
 832         else {
 833             t = cutoff + 1;
 834         }
 835         for (;;) {
 836             if (*s == DIR_SEPARATOR)
 837                 cutoff = t;        /* mark the last slash seen */
 838             if (!(*t++ = *s++))        /* copy the character */
 839                 break;
 840         }
 841     }
 842
 843 #endif /* HAVE_SYMLINK */
 844
 845     strcpy(imagename, cutoff + 1);        /* keep the image name */
 846     *(cutoff + 1) = 0;                /* chop off the filename part */
 847 }
 848
 849 #endif
 850
 851 #if wxUSE_GUI
 852
 853 // ----------------------------------------------------------------------------
 854 // GUI helpers
 855 // ----------------------------------------------------------------------------
 856
 857 /*
 858  * N.B. these convenience functions must be separate from msgdlgg.cpp, textdlgg.cpp
 859  * since otherwise the generic code may be pulled in unnecessarily.
 860  */
 861
 862 int wxMessageBox(const wxString& message, const wxString& caption, long style,
 863                  wxWindow *parent, int WXUNUSED(x), int WXUNUSED(y) )
 864 {
 865     wxMessageDialog dialog(parent, message, caption, style);
 866
 867     int ans = dialog.ShowModal();
 868     switch ( ans )
 869     {
 870         case wxID_OK:
 871             return wxOK;
 872         case wxID_YES:
 873             return wxYES;
 874         case wxID_NO:
 875             return wxNO;
 876         default:
 877         case wxID_CANCEL:
 878             return wxCANCEL;
 879     }
 880 }
 881
 882 #if wxUSE_TEXTDLG
 883 wxString wxGetTextFromUser(const wxString& message, const wxString& caption,
 884                         const wxString& defaultValue, wxWindow *parent,
 885                         int x, int y, bool WXUNUSED(centre) )
 886 {
 887     wxString str;
 888     wxTextEntryDialog dialog(parent, message, caption, defaultValue, wxOK|wxCANCEL, wxPoint(x, y));
 889     if (dialog.ShowModal() == wxID_OK)
 890     {
 891         str = dialog.GetValue();
 892     }
 893
 894     return str;
 895 }
 896
 897 wxString wxGetPasswordFromUser(const wxString& message,
 898                                const wxString& caption,
 899                                const wxString& defaultValue,
 900                                wxWindow *parent)
 901 {
 902     wxString str;
 903     wxTextEntryDialog dialog(parent, message, caption, defaultValue,
 904                              wxOK | wxCANCEL | wxTE_PASSWORD);
 905     if ( dialog.ShowModal() == wxID_OK )
 906     {
 907         str = dialog.GetValue();
 908     }
 909
 910     return str;
 911 }
 912
 913 #endif // wxUSE_TEXTDLG
 914
 915 wxColour wxGetColourFromUser(wxWindow *parent, const wxColour& colInit)
 916 {
 917       wxColourData data;
 918       data.SetChooseFull(TRUE);
 919       if ( colInit.Ok() )
 920       {
 921           data.SetColour((wxColour &)colInit); // const_cast
 922       }
 923
 924       wxColour colRet;
 925       wxColourDialog dialog(parent, &data);
 926       if ( dialog.ShowModal() == wxID_OK )
 927       {
 928           colRet = dialog.GetColourData().GetColour();
 929       }
 930       //else: leave it invalid
 931
 932       return colRet;
 933 }
 934
 935 // ----------------------------------------------------------------------------
 936 // missing C RTL functions (FIXME shouldn't be here at all)
 937 // ----------------------------------------------------------------------------
 938
 939 #ifdef __MWERKS__
 940 char *strdup(const char *s)
 941 {
 942         return strcpy( (char*) malloc( strlen( s ) + 1 ) , s ) ;
 943 }
 944
 945 int isascii( int c )
 946 {
 947         return ( c >= 0 && c < 128 ) ;
 948 }
 949 #endif // __MWERKS__
 950
 951 // ----------------------------------------------------------------------------
 952 // misc functions
 953 // ----------------------------------------------------------------------------
 954
 955 void wxEnableTopLevelWindows(bool enable)
 956 {
 957    wxWindowList::Node *node;
 958    for ( node = wxTopLevelWindows.GetFirst(); node; node = node->GetNext() )
 959       node->GetData()->Enable(enable);
 960 }
 961
 962 // Yield to other apps/messages and disable user input
 963 bool wxSafeYield(wxWindow *win)
 964 {
 965    wxEnableTopLevelWindows(FALSE);
 966    // always enable ourselves
 967    if ( win )
 968       win->Enable(TRUE);
 969    bool rc = wxYield();
 970    wxEnableTopLevelWindows(TRUE);
 971    return rc;
 972 }
 973
 974 // Don't synthesize KeyUp events holding down a key and producing KeyDown
 975 // events with autorepeat. On by default and always on in wxMSW. wxGTK version
 976 // in utilsgtk.cpp.
 977 #ifndef __WXGTK__
 978 bool wxSetDetectableAutoRepeat( bool WXUNUSED(flag) )
 979 {
 980    return TRUE;          // detectable auto-repeat is the only mode MSW supports
 981 }
 982 #endif // !wxGTK
 983
 984 #endif // wxUSE_GUI
 985
 986 // ----------------------------------------------------------------------------
 987 // network and user id functions
 988 // ----------------------------------------------------------------------------
 989
 990 // Get Full RFC822 style email address
 991 bool wxGetEmailAddress(wxChar *address, int maxSize)
 992 {
 993     wxString email = wxGetEmailAddress();
 994     if ( !email )
 995         return FALSE;
 996
 997     wxStrncpy(address, email, maxSize - 1);
 998     address[maxSize - 1] = wxT('\0');
 999
1000     return TRUE;
1001 }
1002
1003 wxString wxGetEmailAddress()
1004 {
1005     wxString email;
1006
1007     wxString host = wxGetHostName();
1008     if ( !!host )
1009     {
1010         wxString user = wxGetUserId();
1011         if ( !!user )
1012         {
1013             wxString email(user);
1014             email << wxT('@') << host;
1015         }
1016     }
1017
1018     return email;
1019 }
1020
1021 wxString wxGetUserId()
1022 {
1023     static const int maxLoginLen = 256; // FIXME arbitrary number
1024
1025     wxString buf;
1026     bool ok = wxGetUserId(buf.GetWriteBuf(maxLoginLen), maxLoginLen);
1027     buf.UngetWriteBuf();
1028
1029     if ( !ok )
1030         buf.Empty();
1031
1032     return buf;
1033 }
1034
1035 wxString wxGetUserName()
1036 {
1037     static const int maxUserNameLen = 1024; // FIXME arbitrary number
1038
1039     wxString buf;
1040     bool ok = wxGetUserName(buf.GetWriteBuf(maxUserNameLen), maxUserNameLen);
1041     buf.UngetWriteBuf();
1042
1043     if ( !ok )
1044         buf.Empty();
1045
1046     return buf;
1047 }
1048
1049 wxString wxGetHostName()
1050 {
1051     static const size_t hostnameSize = 257;
1052
1053     wxString buf;
1054     bool ok = wxGetHostName(buf.GetWriteBuf(hostnameSize), hostnameSize);
1055
1056     buf.UngetWriteBuf();
1057
1058     if ( !ok )
1059         buf.Empty();
1060
1061     return buf;
1062 }
1063
1064 wxString wxGetFullHostName()
1065 {
1066     static const size_t hostnameSize = 257;
1067
1068     wxString buf;
1069     bool ok = wxGetFullHostName(buf.GetWriteBuf(hostnameSize), hostnameSize);
1070
1071     buf.UngetWriteBuf();
1072
1073     if ( !ok )
1074         buf.Empty();
1075
1076     return buf;
1077 }
1078
1079 wxString wxGetHomeDir()
1080 {
1081     wxString home;
1082     wxGetHomeDir(&home);
1083
1084     return home;
1085 }
1086
1087 #if 0
1088
1089 wxString wxGetCurrentDir()
1090 {
1091     wxString dir;
1092     size_t len = 1024;
1093     bool ok;
1094     do
1095     {
1096         ok = getcwd(dir.GetWriteBuf(len + 1), len) != NULL;
1097         dir.UngetWriteBuf();
1098
1099         if ( !ok )
1100         {
1101             if ( errno != ERANGE )
1102             {
1103                 wxLogSysError(_T("Failed to get current directory"));
1104
1105                 return wxEmptyString;
1106             }
1107             else
1108             {
1109                 // buffer was too small, retry with a larger one
1110                 len *= 2;
1111             }
1112         }
1113         //else: ok
1114     } while ( !ok );
1115
1116     return dir;
1117 }
1118
1119 #endif // 0