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
  36     #if wxUSE_GUI
  37         #include "wx/window.h"
  38         #include "wx/menu.h"
  39         #include "wx/frame.h"
  40         #include "wx/msgdlg.h"
  41         #include "wx/textdlg.h"
  42     #endif // wxUSE_GUI
  43 #endif // WX_PRECOMP
  44
  45 #include <ctype.h>
  46 #include <stdio.h>
  47 #include <stdlib.h>
  48 #include <string.h>
  49
  50 #if !defined(__WATCOMC__)
  51     #if !(defined(_MSC_VER) && (_MSC_VER > 800))
  52         #include <errno.h>
  53     #endif
  54 #endif
  55
  56 #include <time.h>
  57
  58 #ifndef __MWERKS__
  59     #include <sys/types.h>
  60     #include <sys/stat.h>
  61 #endif
  62
  63 #ifdef __SALFORDC__
  64     #include <clib.h>
  65 #endif
  66
  67 // Pattern matching code. (FIXME)
  68 // Yes, this path is deliberate (for Borland compilation)
  69 #ifdef wx_mac /* MATTHEW: [5] Mac doesn't like paths with "/" */
  70 #include "glob.inc"
  71 #else
  72 #include "../common/glob.inc"
  73 #endif
  74
  75 #ifdef __WXMSW__
  76     #include "windows.h"
  77 #endif
  78
  79 // ----------------------------------------------------------------------------
  80 // function protoypes
  81 // ----------------------------------------------------------------------------
  82
  83 #if wxUSE_GUI
  84     static wxWindow *wxFindWindowByLabel1(const wxString& title, wxWindow *parent);
  85     static wxWindow *wxFindWindowByName1 (const wxString& title, wxWindow *parent);
  86 #endif // wxUSE_GUI
  87
  88 // ============================================================================
  89 // implementation
  90 // ============================================================================
  91
  92 // ----------------------------------------------------------------------------
  93 // string functions
  94 // ----------------------------------------------------------------------------
  95
  96 #ifdef __WXMAC__
  97 int strcasecmp(const char *str_1, const char *str_2)
  98 {
  99   register char c1, c2;
 100   do {
 101     c1 = tolower(*str_1++);
 102     c2 = tolower(*str_2++);
 103   } while ( c1 && (c1 == c2) );
 104
 105   return c1 - c2;
 106 }
 107
 108 int strncasecmp(const char *str_1, const char *str_2, size_t maxchar)
 109 {
 110
 111   register char c1, c2;
 112   while( maxchar--)
 113   {
 114     c1 = tolower(*str_1++);
 115     c2 = tolower(*str_2++);
 116
 117     if ( !c1 || c1!=c2 )
 118                   return c1 - c2;
 119
 120   } ;
 121
 122   return 0 ;
 123
 124 }
 125 #endif // wxMAC
 126
 127 #ifdef __VMS__
 128 // we have no strI functions under VMS, therefore I have implemented
 129 // an inefficient but portable version: convert copies of strings to lowercase
 130 // and then use the normal comparison
 131 static void myLowerString(char *s)
 132 {
 133   while(*s){
 134     if(isalpha(*s)) *s = (char)tolower(*s);
 135     s++;
 136   }
 137 }
 138
 139 int strcasecmp(const char *str_1, const char *str_2)
 140 {
 141   char *temp1 = new char[strlen(str_1)+1];
 142   char *temp2 = new char[strlen(str_2)+1];
 143   strcpy(temp1,str_1);
 144   strcpy(temp2,str_2);
 145   myLowerString(temp1);
 146   myLowerString(temp2);
 147
 148   int result = strcmp(temp1,temp2);
 149   delete[] temp1;
 150   delete[] temp2;
 151
 152   return(result);
 153 }
 154
 155 int strncasecmp(const char *str_1, const char *str_2, size_t maxchar)
 156 {
 157   char *temp1 = new char[strlen(str_1)+1];
 158   char *temp2 = new char[strlen(str_2)+1];
 159   strcpy(temp1,str_1);
 160   strcpy(temp2,str_2);
 161   myLowerString(temp1);
 162   myLowerString(temp2);
 163
 164   int result = strncmp(temp1,temp2,maxchar);
 165   delete[] temp1;
 166   delete[] temp2;
 167
 168   return(result);
 169 }
 170 #endif // __VMS__
 171
 172 #ifdef __WINDOWS__
 173
 174 #ifndef __GNUWIN32__
 175 #ifndef __MWERKS__
 176 #define strcasecmp stricmp
 177 #define strncasecmp strnicmp
 178 #else
 179 #define strcasecmp _stricmp
 180 #define strncasecmp _strnicmp
 181 #endif
 182 #endif
 183
 184 #else
 185
 186 #ifdef __EMX__
 187 #define strcasecmp stricmp
 188 #define strncasecmp strnicmp
 189 #endif
 190
 191 // This declaration is missing in SunOS!
 192 // (Yes, I know it is NOT ANSI-C but its in BSD libc)
 193 #if defined(__xlC) || defined(__AIX__) || defined(__GNUG__)
 194 extern "C"
 195 {
 196   int strcasecmp (const char *, const char *);
 197   int strncasecmp (const char *, const char *, size_t);
 198 }
 199 #endif
 200 #endif  /* __WXMSW__ */
 201
 202 #ifdef __WXPM__
 203 #define strcasecmp stricmp
 204 #define strncasecmp strnicmp
 205 #endif
 206
 207 wxChar *
 208 copystring (const wxChar *s)
 209 {
 210   if (s == NULL) s = wxT("");
 211   size_t len = wxStrlen (s) + 1;
 212
 213   wxChar *news = new wxChar[len];
 214   memcpy (news, s, len * sizeof(wxChar));    // Should be the fastest
 215
 216   return news;
 217 }
 218
 219 // Id generation
 220 static long wxCurrentId = 100;
 221
 222 long
 223 wxNewId (void)
 224 {
 225   return wxCurrentId++;
 226 }
 227
 228 long
 229 wxGetCurrentId(void) { return wxCurrentId; }
 230
 231 void
 232 wxRegisterId (long id)
 233 {
 234   if (id >= wxCurrentId)
 235     wxCurrentId = id + 1;
 236 }
 237
 238 void
 239 StringToFloat (wxChar *s, float *number)
 240 {
 241   if (s && *s && number)
 242     *number = (float) wxStrtod (s, (wxChar **) NULL);
 243 }
 244
 245 void
 246 StringToDouble (wxChar *s, double *number)
 247 {
 248   if (s && *s && number)
 249     *number = wxStrtod (s, (wxChar **) NULL);
 250 }
 251
 252 wxChar *
 253 FloatToString (float number, const wxChar *fmt)
 254 {
 255   static wxChar buf[256];
 256
 257 //  sprintf (buf, "%.2f", number);
 258   wxSprintf (buf, fmt, number);
 259   return buf;
 260 }
 261
 262 wxChar *
 263 DoubleToString (double number, const wxChar *fmt)
 264 {
 265   static wxChar buf[256];
 266
 267   wxSprintf (buf, fmt, number);
 268   return buf;
 269 }
 270
 271 void
 272 StringToInt (wxChar *s, int *number)
 273 {
 274   if (s && *s && number)
 275     *number = (int) wxStrtol (s, (wxChar **) NULL, 10);
 276 }
 277
 278 void
 279 StringToLong (wxChar *s, long *number)
 280 {
 281   if (s && *s && number)
 282     *number = wxStrtol (s, (wxChar **) NULL, 10);
 283 }
 284
 285 wxChar *
 286 IntToString (int number)
 287 {
 288   static wxChar buf[20];
 289
 290   wxSprintf (buf, wxT("%d"), number);
 291   return buf;
 292 }
 293
 294 wxChar *
 295 LongToString (long number)
 296 {
 297   static wxChar buf[20];
 298
 299   wxSprintf (buf, wxT("%ld"), number);
 300   return buf;
 301 }
 302
 303 // Array used in DecToHex conversion routine.
 304 static wxChar hexArray[] = wxT("0123456789ABCDEF");
 305
 306 // Convert 2-digit hex number to decimal
 307 int wxHexToDec(const wxString& buf)
 308 {
 309   int firstDigit, secondDigit;
 310
 311   if (buf.GetChar(0) >= wxT('A'))
 312     firstDigit = buf.GetChar(0) - wxT('A') + 10;
 313   else
 314     firstDigit = buf.GetChar(0) - wxT('0');
 315
 316   if (buf.GetChar(1) >= wxT('A'))
 317     secondDigit = buf.GetChar(1) - wxT('A') + 10;
 318   else
 319     secondDigit = buf.GetChar(1) - wxT('0');
 320
 321   return firstDigit * 16 + secondDigit;
 322 }
 323
 324 // Convert decimal integer to 2-character hex string
 325 void wxDecToHex(int dec, wxChar *buf)
 326 {
 327   int firstDigit = (int)(dec/16.0);
 328   int secondDigit = (int)(dec - (firstDigit*16.0));
 329   buf[0] = hexArray[firstDigit];
 330   buf[1] = hexArray[secondDigit];
 331   buf[2] = 0;
 332 }
 333
 334 // Convert decimal integer to 2-character hex string
 335 wxString wxDecToHex(int dec)
 336 {
 337     wxChar buf[3];
 338     wxDecToHex(dec, buf);
 339     return wxString(buf);
 340 }
 341
 342 // Match a string INDEPENDENT OF CASE
 343 bool
 344 StringMatch (char *str1, char *str2, bool subString, bool exact)
 345 {
 346   if (str1 == NULL || str2 == NULL)
 347     return FALSE;
 348   if (str1 == str2)
 349     return TRUE;
 350
 351   if (subString)
 352     {
 353       int len1 = strlen (str1);
 354       int len2 = strlen (str2);
 355       int i;
 356
 357       // Search for str1 in str2
 358       // Slow .... but acceptable for short strings
 359       for (i = 0; i <= len2 - len1; i++)
 360         {
 361           if (strncasecmp (str1, str2 + i, len1) == 0)
 362             return TRUE;
 363         }
 364     }
 365   else if (exact)
 366     {
 367       if (strcasecmp (str1, str2) == 0)
 368         return TRUE;
 369     }
 370   else
 371     {
 372       int len1 = strlen (str1);
 373       int len2 = strlen (str2);
 374
 375       if (strncasecmp (str1, str2, wxMin (len1, len2)) == 0)
 376         return TRUE;
 377     }
 378
 379   return FALSE;
 380 }
 381
 382 // Return the current date/time
 383 // [volatile]
 384 wxString wxNow()
 385 {
 386   time_t now = time((time_t *) NULL);
 387   char *date = ctime(&now);
 388   date[24] = '\0';
 389   return wxString(date);
 390 }
 391
 392 #if wxUSE_GUI
 393
 394 // ----------------------------------------------------------------------------
 395 // Strip out any menu codes
 396 // ----------------------------------------------------------------------------
 397
 398 wxChar *wxStripMenuCodes (wxChar *in, wxChar *out)
 399 {
 400   if (!in)
 401     return (wxChar *) NULL;
 402
 403   if (!out)
 404     out = copystring(in);
 405
 406   wxChar *tmpOut = out;
 407
 408   while (*in)
 409     {
 410       if (*in == wxT('&'))
 411         {
 412           // Check && -> &, &x -> x
 413           if (*++in == wxT('&'))
 414             *out++ = *in++;
 415         }
 416       else if (*in == wxT('\t'))
 417         {
 418           // Remove all stuff after \t in X mode, and let the stuff as is
 419           // in Windows mode.
 420           // Accelerators are handled in wx_item.cc for Motif, and are not
 421           // YET supported in XView
 422           break;
 423         }
 424       else
 425         *out++ = *in++;
 426     }                                // while
 427
 428   *out = wxT('\0');
 429
 430   return tmpOut;
 431 }
 432
 433 wxString wxStripMenuCodes(const wxString& str)
 434 {
 435     wxChar *buf = new wxChar[str.Length() + 1];
 436     wxStripMenuCodes(WXSTRINGCAST str, buf);
 437     wxString str1(buf);
 438     delete[] buf;
 439     return str1;
 440 }
 441
 442 // ----------------------------------------------------------------------------
 443 // Window search functions
 444 // ----------------------------------------------------------------------------
 445
 446 /*
 447  * If parent is non-NULL, look through children for a label or title
 448  * matching the specified string. If NULL, look through all top-level windows.
 449  *
 450  */
 451
 452 wxWindow *
 453 wxFindWindowByLabel (const wxString& title, wxWindow * parent)
 454 {
 455     if (parent)
 456     {
 457         return wxFindWindowByLabel1(title, parent);
 458     }
 459     else
 460     {
 461         for ( wxWindowList::Node * node = wxTopLevelWindows.GetFirst();
 462               node;
 463               node = node->GetNext() )
 464         {
 465             wxWindow *win = node->GetData();
 466             wxWindow *retwin = wxFindWindowByLabel1 (title, win);
 467             if (retwin)
 468                 return retwin;
 469         }                        // for()
 470
 471     }
 472     return (wxWindow *) NULL;
 473 }
 474
 475 // Recursive
 476 static wxWindow *
 477 wxFindWindowByLabel1 (const wxString& title, wxWindow * parent)
 478 {
 479     if (parent)
 480     {
 481         if (parent->GetLabel() == title)
 482             return parent;
 483     }
 484
 485     if (parent)
 486     {
 487         for ( wxWindowList::Node * node = parent->GetChildren().GetFirst();
 488               node;
 489               node = node->GetNext() )
 490         {
 491             wxWindow *win = (wxWindow *)node->GetData();
 492             wxWindow *retwin = wxFindWindowByLabel1 (title, win);
 493             if (retwin)
 494                 return retwin;
 495         }
 496
 497     }
 498
 499     return (wxWindow *) NULL;                        // Not found
 500 }
 501
 502 /*
 503  * If parent is non-NULL, look through children for a name
 504  * matching the specified string. If NULL, look through all top-level windows.
 505  *
 506  */
 507
 508 wxWindow *
 509 wxFindWindowByName (const wxString& title, wxWindow * parent)
 510 {
 511     if (parent)
 512     {
 513         return wxFindWindowByName1 (title, parent);
 514     }
 515     else
 516     {
 517         for ( wxWindowList::Node * node = wxTopLevelWindows.GetFirst();
 518               node;
 519               node = node->GetNext() )
 520         {
 521             wxWindow *win = node->GetData();
 522             wxWindow *retwin = wxFindWindowByName1 (title, win);
 523             if (retwin)
 524                 return retwin;
 525         }
 526
 527     }
 528
 529     // Failed? Try by label instead.
 530     return wxFindWindowByLabel(title, parent);
 531 }
 532
 533 // Recursive
 534 static wxWindow *
 535 wxFindWindowByName1 (const wxString& title, wxWindow * parent)
 536 {
 537   if (parent)
 538     {
 539             if ( parent->GetName() == title )
 540                         return parent;
 541     }
 542
 543   if (parent)
 544     {
 545       for (wxNode * node = parent->GetChildren().First (); node; node = node->Next ())
 546         {
 547           wxWindow *win = (wxWindow *) node->Data ();
 548           wxWindow *retwin = wxFindWindowByName1 (title, win);
 549           if (retwin)
 550             return retwin;
 551         }                        // for()
 552
 553     }
 554
 555   return (wxWindow *) NULL;                        // Not found
 556
 557 }
 558
 559 // Returns menu item id or -1 if none.
 560 int
 561 wxFindMenuItemId (wxFrame * frame, const wxString& menuString, const wxString& itemString)
 562 {
 563   wxMenuBar *menuBar = frame->GetMenuBar ();
 564   if (!menuBar)
 565     return -1;
 566   return menuBar->FindMenuItem (menuString, itemString);
 567 }
 568
 569 #endif // wxUSE_GUI
 570
 571 /*
 572 On Fri, 21 Jul 1995, Paul Craven wrote:
 573
 574 > Is there a way to find the path of running program's executable? I can get
 575 > my home directory, and the current directory, but I don't know how to get the
 576 > executable directory.
 577 >
 578
 579 The code below (warty as it is), does what you want on most Unix,
 580 DOS, and Mac platforms (it's from the ALS Prolog main).
 581
 582 || Ken Bowen      Applied Logic Systems, Inc.         PO Box 180,
 583 ||====            Voice:  +1 (617)965-9191            Newton Centre,
 584 ||                FAX:    +1 (617)965-1636            MA  02159  USA
 585                   Email:  ken@als.com        WWW: http://www.als.com
 586 ------------------------------------------------------------------------
 587 */
 588
 589 // This code is commented out but it may be integrated with wxWin at
 590 // a later date, after testing. Thanks Ken!
 591 #if 0
 592
 593 /*--------------------------------------------------------------------*
 594  | whereami is given a filename f in the form:  whereami(argv[0])
 595  | It returns the directory in which the executable file (containing
 596  | this code [main.c] ) may be found.  A dot will be returned to indicate
 597  | the current directory.
 598  *--------------------------------------------------------------------*/
 599
 600 static void
 601 whereami(name)
 602     char *name;
 603 {
 604     register char *cutoff = NULL;        /* stifle -Wall */
 605     register char *s;
 606     register char *t;
 607     int   cc;
 608     char  ebuf[4096];
 609
 610     /*
 611      * See if the file is accessible either through the current directory
 612      * or through an absolute path.
 613      */
 614
 615     if (access(name, R_OK) == 0) {
 616
 617         /*-------------------------------------------------------------*
 618          * The file was accessible without any other work.  But the current
 619          * working directory might change on us, so if it was accessible
 620          * through the cwd, then we should get it for later accesses.
 621          *-------------------------------------------------------------*/
 622
 623         t = imagedir;
 624         if (!absolute_pathname(name)) {
 625 #if defined(DOS) || defined(__WIN32__)
 626             int   drive;
 627             char *newrbuf;
 628
 629             newrbuf = imagedir;
 630 #ifndef __DJGPP__
 631             if (*(name + 1) == ':') {
 632                 if (*name >= 'a' && *name <= 'z')
 633                     drive = (int) (*name - 'a' + 1);
 634                 else
 635                     drive = (int) (*name - 'A' + 1);
 636                 *newrbuf++ = *name;
 637                 *newrbuf++ = *(name + 1);
 638                 *newrbuf++ = DIR_SEPARATOR;
 639             }
 640             else {
 641                 drive = 0;
 642                 *newrbuf++ = DIR_SEPARATOR;
 643             }
 644             if (getcwd(newrbuf, drive) == 0) {        /* } */
 645 #else
 646             if (getcwd(newrbuf, 1024) == 0) {        /* } */
 647 #endif
 648 #else  /* DOS */
 649 #ifdef HAVE_GETWD
 650             if (getwd(imagedir) == 0) {                /* } */
 651 #else  /* !HAVE_GETWD */
 652             if (getcwd(imagedir, 1024) == 0) {
 653 #endif /* !HAVE_GETWD */
 654 #endif /* DOS */
 655                 fatal_error(FE_GETCWD, 0);
 656             }
 657             for (; *t; t++)        /* Set t to end of buffer */
 658                 ;
 659             if (*(t - 1) == DIR_SEPARATOR)        /* leave slash if already
 660                                                  * last char
 661                                                  */
 662                 cutoff = t - 1;
 663             else {
 664                 cutoff = t;        /* otherwise put one in */
 665                 *t++ = DIR_SEPARATOR;
 666             }
 667         }
 668 #if (!defined(__MAC__) && !defined(__DJGPP__) && !defined(__GO32__) && !defined(__WIN32__))
 669         else
 670                 (*t++ = DIR_SEPARATOR);
 671 #endif
 672
 673         /*-------------------------------------------------------------*
 674          * Copy the rest of the string and set the cutoff if it was not
 675          * already set.  If the first character of name is a slash, cutoff
 676          * is not presently set but will be on the first iteration of the
 677          * loop below.
 678          *-------------------------------------------------------------*/
 679
 680         for ((*name == DIR_SEPARATOR ? (s = name+1) : (s = name));;) {
 681             if (*s == DIR_SEPARATOR)
 682                         cutoff = t;
 683             if (!(*t++ = *s++))
 684                         break;
 685         }
 686
 687     }
 688     else {
 689
 690         /*-------------------------------------------------------------*
 691          * Get the path list from the environment.  If the path list is
 692          * inaccessible for any reason, leave with fatal error.
 693          *-------------------------------------------------------------*/
 694
 695 #ifdef __MAC__
 696         if ((s = getenv("Commands")) == (char *) 0)
 697 #else
 698         if ((s = getenv("PATH")) == (char *) 0)
 699 #endif
 700             fatal_error(FE_PATH, 0);
 701
 702         /*
 703          * Copy path list into ebuf and set the source pointer to the
 704          * beginning of this buffer.
 705          */
 706
 707         strcpy(ebuf, s);
 708         s = ebuf;
 709
 710         for (;;) {
 711             t = imagedir;
 712             while (*s && *s != PATH_SEPARATOR)
 713                 *t++ = *s++;
 714             if (t > imagedir && *(t - 1) == DIR_SEPARATOR)
 715                 ;                /* do nothing -- slash already is in place */
 716             else
 717                 *t++ = DIR_SEPARATOR;        /* put in the slash */
 718             cutoff = t - 1;        /* set cutoff */
 719             strcpy(t, name);
 720             if (access(imagedir, R_OK) == 0)
 721                 break;
 722
 723             if (*s)
 724                 s++;                /* advance source pointer */
 725             else
 726                 fatal_error(FE_INFND, 0);
 727         }
 728
 729     }
 730
 731     /*-------------------------------------------------------------*
 732      | At this point the full pathname should exist in imagedir and
 733      | cutoff should be set to the final slash.  We must now determine
 734      | whether the file name is a symbolic link or not and chase it down
 735      | if it is.  Note that we reuse ebuf for getting the link.
 736      *-------------------------------------------------------------*/
 737
 738 #ifdef HAVE_SYMLINK
 739     while ((cc = readlink(imagedir, ebuf, 512)) != -1) {
 740         ebuf[cc] = 0;
 741         s = ebuf;
 742         if (*s == DIR_SEPARATOR) {
 743             t = imagedir;
 744         }
 745         else {
 746             t = cutoff + 1;
 747         }
 748         for (;;) {
 749             if (*s == DIR_SEPARATOR)
 750                 cutoff = t;        /* mark the last slash seen */
 751             if (!(*t++ = *s++))        /* copy the character */
 752                 break;
 753         }
 754     }
 755
 756 #endif /* HAVE_SYMLINK */
 757
 758     strcpy(imagename, cutoff + 1);        /* keep the image name */
 759     *(cutoff + 1) = 0;                /* chop off the filename part */
 760 }
 761
 762 #endif
 763
 764 #if wxUSE_GUI
 765
 766 // ----------------------------------------------------------------------------
 767 // GUI helpers
 768 // ----------------------------------------------------------------------------
 769
 770 /*
 771  * N.B. these convenience functions must be separate from msgdlgg.cpp, textdlgg.cpp
 772  * since otherwise the generic code may be pulled in unnecessarily.
 773  */
 774
 775 int wxMessageBox(const wxString& message, const wxString& caption, long style,
 776                  wxWindow *parent, int WXUNUSED(x), int WXUNUSED(y) )
 777 {
 778     wxMessageDialog dialog(parent, message, caption, style);
 779
 780     int ans = dialog.ShowModal();
 781     switch ( ans )
 782     {
 783         case wxID_OK:
 784             return wxOK;
 785             break;
 786         case wxID_YES:
 787             return wxYES;
 788             break;
 789         case wxID_NO:
 790             return wxNO;
 791             break;
 792         default:
 793         case wxID_CANCEL:
 794             return wxCANCEL;
 795             break;
 796     }
 797     return ans;
 798 }
 799
 800 #if wxUSE_TEXTDLG
 801 wxString wxGetTextFromUser(const wxString& message, const wxString& caption,
 802                         const wxString& defaultValue, wxWindow *parent,
 803                         int x, int y, bool WXUNUSED(centre) )
 804 {
 805     wxTextEntryDialog dialog(parent, message, caption, defaultValue, wxOK|wxCANCEL, wxPoint(x, y));
 806     if (dialog.ShowModal() == wxID_OK)
 807         return dialog.GetValue();
 808     else
 809         return wxString("");
 810 }
 811 #endif // wxUSE_TEXTDLG
 812
 813 #ifdef __MWERKS__
 814 char *strdup(const char *s)
 815 {
 816         return strcpy( (char*) malloc( strlen( s ) + 1 ) , s ) ;
 817 }
 818
 819 int isascii( int c )
 820 {
 821         return ( c >= 0 && c < 128 ) ;
 822 }
 823 #endif // __MWERKS__
 824
 825 // ----------------------------------------------------------------------------
 826 // misc functions
 827 // ----------------------------------------------------------------------------
 828
 829 void wxEnableTopLevelWindows(bool enable)
 830 {
 831    wxWindowList::Node *node;
 832    for ( node = wxTopLevelWindows.GetFirst(); node; node = node->GetNext() )
 833       node->GetData()->Enable(enable);
 834 }
 835
 836 // Yield to other apps/messages and disable user input
 837 bool wxSafeYield(wxWindow *win)
 838 {
 839    wxEnableTopLevelWindows(FALSE);
 840    // always enable ourselves
 841    if ( win )
 842       win->Enable(TRUE);
 843    bool rc = wxYield();
 844    wxEnableTopLevelWindows(TRUE);
 845    return rc;
 846 }
 847
 848 // Don't synthesize KeyUp events holding down a key and producing KeyDown
 849 // events with autorepeat. On by default and always on in wxMSW. wxGTK version
 850 // in utilsgtk.cpp.
 851 #ifndef __WXGTK__
 852 bool wxSetDetectableAutoRepeat( bool WXUNUSED(flag) )
 853 {
 854    return TRUE;          // detectable auto-repeat is the only mode MSW supports
 855 }
 856 #endif // !wxGTK
 857
 858 #endif // wxUSE_GUI
 859
 860 // ----------------------------------------------------------------------------
 861 // network and user id functions
 862 // ----------------------------------------------------------------------------
 863
 864 // Get Full RFC822 style email address
 865 bool wxGetEmailAddress(wxChar *address, int maxSize)
 866 {
 867     wxString email = wxGetEmailAddress();
 868     if ( !email )
 869         return FALSE;
 870
 871     wxStrncpy(address, email, maxSize - 1);
 872     address[maxSize - 1] = wxT('\0');
 873
 874     return TRUE;
 875 }
 876
 877 wxString wxGetEmailAddress()
 878 {
 879     wxString email;
 880
 881     wxString host = wxGetHostName();
 882     if ( !!host )
 883     {
 884         wxString user = wxGetUserId();
 885         if ( !!user )
 886         {
 887             wxString email(user);
 888             email << wxT('@') << host;
 889         }
 890     }
 891
 892     return email;
 893 }
 894
 895 wxString wxGetUserId()
 896 {
 897     static const int maxLoginLen = 256; // FIXME arbitrary number
 898
 899     wxString buf;
 900     bool ok = wxGetUserId(buf.GetWriteBuf(maxLoginLen), maxLoginLen);
 901     buf.UngetWriteBuf();
 902
 903     if ( !ok )
 904         buf.Empty();
 905
 906     return buf;
 907 }
 908
 909 wxString wxGetUserName()
 910 {
 911     static const int maxUserNameLen = 1024; // FIXME arbitrary number
 912
 913     wxString buf;
 914     bool ok = wxGetUserName(buf.GetWriteBuf(maxUserNameLen), maxUserNameLen);
 915     buf.UngetWriteBuf();
 916
 917     if ( !ok )
 918         buf.Empty();
 919
 920     return buf;
 921 }
 922
 923 wxString wxGetHostName()
 924 {
 925     static const size_t hostnameSize = 257;
 926
 927     wxString buf;
 928     bool ok = wxGetHostName(buf.GetWriteBuf(hostnameSize), hostnameSize);
 929
 930     buf.UngetWriteBuf();
 931
 932     if ( !ok )
 933         buf.Empty();
 934
 935     return buf;
 936 }
 937
 938 wxString wxGetFullHostName()
 939 {
 940     static const size_t hostnameSize = 257;
 941
 942     wxString buf;
 943     bool ok = wxGetFullHostName(buf.GetWriteBuf(hostnameSize), hostnameSize);
 944
 945     buf.UngetWriteBuf();
 946
 947     if ( !ok )
 948         buf.Empty();
 949
 950     return buf;
 951 }
 952