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