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 #ifdef __GNUG__
  13 #pragma implementation "utils.h"
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #ifdef __BORLANDC__
  20 #pragma hdrstop
  21 #endif
  22
  23 #ifndef WX_PRECOMP
  24 #include "wx/defs.h"
  25 #include "wx/utils.h"
  26 #include "wx/window.h"
  27 #include "wx/menu.h"
  28 #include "wx/frame.h"
  29 #include "wx/msgdlg.h"
  30 #include "wx/textdlg.h"
  31 #endif
  32
  33 #include "wx/ioswrap.h"
  34
  35 #if wxUSE_IOSTREAMH
  36     #include <fstream.h>
  37 #else
  38     #include <fstream>
  39 #endif
  40
  41 #include <ctype.h>
  42 #include <stdio.h>
  43 #include <stdlib.h>
  44 #include <string.h>
  45 #if !defined(__WATCOMC__)
  46     #if !(defined(_MSC_VER) && (_MSC_VER > 800))
  47         #include <errno.h>
  48     #endif
  49 #endif
  50 #include <time.h>
  51 #ifndef __MWERKS__
  52 #include <sys/types.h>
  53 #include <sys/stat.h>
  54 #endif
  55
  56 #ifdef __SALFORDC__
  57 #include <clib.h>
  58 #endif
  59
  60 // Pattern matching code.
  61 // Yes, this path is deliberate (for Borland compilation)
  62 #ifdef wx_mac /* MATTHEW: [5] Mac doesn't like paths with "/" */
  63 #include "glob.inc"
  64 #else
  65 #include "../common/glob.inc"
  66 #endif
  67
  68 #ifdef __WXMSW__
  69 #include "windows.h"
  70 #endif
  71
  72 #define _MAXPATHLEN 500
  73
  74 extern char *wxBuffer;
  75
  76 #ifdef __WXMAC__
  77 int strcasecmp(const char *str_1, const char *str_2)
  78 {
  79   register char c1, c2;
  80   do {
  81     c1 = tolower(*str_1++);
  82     c2 = tolower(*str_2++);
  83   } while ( c1 && (c1 == c2) );
  84
  85   return c1 - c2;
  86 }
  87
  88 int strncasecmp(const char *str_1, const char *str_2, size_t maxchar)
  89 {
  90
  91   register char c1, c2;
  92   while( maxchar--)
  93   {
  94     c1 = tolower(*str_1++);
  95     c2 = tolower(*str_2++);
  96
  97     if ( !c1 || c1!=c2 )
  98                   return c1 - c2;
  99
 100   } ;
 101
 102   return 0 ;
 103
 104 }
 105 #endif
 106 #ifdef __VMS__
 107 // we have no strI functions under VMS, therefore I have implemented
 108 // an inefficient but portable version: convert copies of strings to lowercase
 109 // and then use the normal comparison
 110 static void myLowerString(char *s)
 111 {
 112   while(*s){
 113     if(isalpha(*s)) *s = (char)tolower(*s);
 114     s++;
 115   }
 116 }
 117
 118 int strcasecmp(const char *str_1, const char *str_2)
 119 {
 120   char *temp1 = new char[strlen(str_1)+1];
 121   char *temp2 = new char[strlen(str_2)+1];
 122   strcpy(temp1,str_1);
 123   strcpy(temp2,str_2);
 124   myLowerString(temp1);
 125   myLowerString(temp2);
 126
 127   int result = strcmp(temp1,temp2);
 128   delete[] temp1;
 129   delete[] temp2;
 130
 131   return(result);
 132 }
 133
 134 int strncasecmp(const char *str_1, const char *str_2, size_t maxchar)
 135 {
 136   char *temp1 = new char[strlen(str_1)+1];
 137   char *temp2 = new char[strlen(str_2)+1];
 138   strcpy(temp1,str_1);
 139   strcpy(temp2,str_2);
 140   myLowerString(temp1);
 141   myLowerString(temp2);
 142
 143   int result = strncmp(temp1,temp2,maxchar);
 144   delete[] temp1;
 145   delete[] temp2;
 146
 147   return(result);
 148 }
 149 #endif
 150
 151 #ifdef __WINDOWS__
 152
 153 #ifndef __GNUWIN32__
 154 #ifndef __MWERKS__
 155 #define strcasecmp stricmp
 156 #define strncasecmp strnicmp
 157 #else
 158 #define strcasecmp _stricmp
 159 #define strncasecmp _strnicmp
 160 #endif
 161 #endif
 162
 163 #else
 164 // This declaration is missing in SunOS!
 165 // (Yes, I know it is NOT ANSI-C but its in BSD libc)
 166 #if defined(__xlC) || defined(__AIX__) || defined(__GNUG__)
 167 extern "C"
 168 {
 169   int strcasecmp (const char *, const char *);
 170   int strncasecmp (const char *, const char *, size_t);
 171 }
 172 #endif
 173 #endif  /* __WXMSW__ */
 174
 175
 176 char *
 177 copystring (const char *s)
 178 {
 179   if (s == NULL) s = "";
 180   size_t len = strlen (s) + 1;
 181
 182   char *news = new char[len];
 183   memcpy (news, s, len);    // Should be the fastest
 184
 185   return news;
 186 }
 187
 188 // Id generation
 189 static long wxCurrentId = 100;
 190
 191 long
 192 wxNewId (void)
 193 {
 194   return wxCurrentId++;
 195 }
 196
 197 long
 198 wxGetCurrentId(void) { return wxCurrentId; }
 199
 200 void
 201 wxRegisterId (long id)
 202 {
 203   if (id >= wxCurrentId)
 204     wxCurrentId = id + 1;
 205 }
 206
 207 void
 208 StringToFloat (char *s, float *number)
 209 {
 210   if (s && *s && number)
 211     *number = (float) strtod (s, (char **) NULL);
 212 }
 213
 214 void
 215 StringToDouble (char *s, double *number)
 216 {
 217   if (s && *s && number)
 218     *number = strtod (s, (char **) NULL);
 219 }
 220
 221 char *
 222 FloatToString (float number, const char *fmt)
 223 {
 224   static char buf[256];
 225
 226 //  sprintf (buf, "%.2f", number);
 227   sprintf (buf, fmt, number);
 228   return buf;
 229 }
 230
 231 char *
 232 DoubleToString (double number, const char *fmt)
 233 {
 234   static char buf[256];
 235
 236   sprintf (buf, fmt, number);
 237   return buf;
 238 }
 239
 240 void
 241 StringToInt (char *s, int *number)
 242 {
 243   if (s && *s && number)
 244     *number = (int) strtol (s, (char **) NULL, 10);
 245 }
 246
 247 void
 248 StringToLong (char *s, long *number)
 249 {
 250   if (s && *s && number)
 251     *number = strtol (s, (char **) NULL, 10);
 252 }
 253
 254 char *
 255 IntToString (int number)
 256 {
 257   static char buf[20];
 258
 259   sprintf (buf, "%d", number);
 260   return buf;
 261 }
 262
 263 char *
 264 LongToString (long number)
 265 {
 266   static char buf[20];
 267
 268   sprintf (buf, "%ld", number);
 269   return buf;
 270 }
 271
 272 // Array used in DecToHex conversion routine.
 273 static char hexArray[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B',
 274   'C', 'D', 'E', 'F' };
 275
 276 // Convert 2-digit hex number to decimal
 277 int wxHexToDec(const wxString& buf)
 278 {
 279   int firstDigit, secondDigit;
 280
 281   if (buf.GetChar(0) >= 'A')
 282     firstDigit = buf.GetChar(0) - 'A' + 10;
 283   else
 284     firstDigit = buf.GetChar(0) - '0';
 285
 286   if (buf.GetChar(1) >= 'A')
 287     secondDigit = buf.GetChar(1) - 'A' + 10;
 288   else
 289     secondDigit = buf.GetChar(1) - '0';
 290
 291   return firstDigit * 16 + secondDigit;
 292 }
 293
 294 // Convert decimal integer to 2-character hex string
 295 void wxDecToHex(int dec, char *buf)
 296 {
 297   int firstDigit = (int)(dec/16.0);
 298   int secondDigit = (int)(dec - (firstDigit*16.0));
 299   buf[0] = hexArray[firstDigit];
 300   buf[1] = hexArray[secondDigit];
 301   buf[2] = 0;
 302 }
 303
 304 // Convert decimal integer to 2-character hex string
 305 wxString wxDecToHex(int dec)
 306 {
 307     char buf[3];
 308     wxDecToHex(dec, buf);
 309     return wxString(buf);
 310 }
 311
 312 // Match a string INDEPENDENT OF CASE
 313 bool
 314 StringMatch (char *str1, char *str2, bool subString, bool exact)
 315 {
 316   if (str1 == NULL || str2 == NULL)
 317     return FALSE;
 318   if (str1 == str2)
 319     return TRUE;
 320
 321   if (subString)
 322     {
 323       int len1 = strlen (str1);
 324       int len2 = strlen (str2);
 325       int i;
 326
 327       // Search for str1 in str2
 328       // Slow .... but acceptable for short strings
 329       for (i = 0; i <= len2 - len1; i++)
 330         {
 331           if (strncasecmp (str1, str2 + i, len1) == 0)
 332             return TRUE;
 333         }
 334     }
 335   else if (exact)
 336     {
 337       if (strcasecmp (str1, str2) == 0)
 338         return TRUE;
 339     }
 340   else
 341     {
 342       int len1 = strlen (str1);
 343       int len2 = strlen (str2);
 344
 345       if (strncasecmp (str1, str2, wxMin (len1, len2)) == 0)
 346         return TRUE;
 347     }
 348
 349   return FALSE;
 350 }
 351
 352 // Return the current date/time
 353 // [volatile]
 354 wxString wxNow( void )
 355 {
 356   time_t now = time((time_t *) NULL);
 357   char *date = ctime(&now);
 358   date[24] = '\0';
 359   return wxString(date);
 360 }
 361
 362 /* Get Full RFC822 style email address */
 363 bool
 364 wxGetEmailAddress (char *address, int maxSize)
 365 {
 366   char host[65];
 367   char user[65];
 368
 369   if (wxGetHostName(host, 64) == FALSE)
 370     return FALSE;
 371   if (wxGetUserId(user, 64) == FALSE)
 372     return FALSE;
 373
 374   char tmp[130];
 375   strcpy(tmp, user);
 376   strcat(tmp, "@");
 377   strcat(tmp, host);
 378
 379   strncpy(address, tmp, maxSize - 1);
 380   address[maxSize-1] = '\0';
 381   return TRUE;
 382 }
 383
 384 /*
 385  * Strip out any menu codes
 386  */
 387
 388 char *wxStripMenuCodes (char *in, char *out)
 389 {
 390   if (!in)
 391     return (char *) NULL;
 392
 393   if (!out)
 394     out = copystring(in);
 395
 396   char *tmpOut = out;
 397
 398   while (*in)
 399     {
 400       if (*in == '&')
 401         {
 402           // Check && -> &, &x -> x
 403           if (*++in == '&')
 404             *out++ = *in++;
 405         }
 406       else if (*in == '\t')
 407         {
 408           // Remove all stuff after \t in X mode, and let the stuff as is
 409           // in Windows mode.
 410           // Accelerators are handled in wx_item.cc for Motif, and are not
 411           // YET supported in XView
 412           break;
 413         }
 414       else
 415         *out++ = *in++;
 416     }                                // while
 417
 418   *out = '\0';
 419
 420   return tmpOut;
 421 }
 422
 423 wxString wxStripMenuCodes(const wxString& str)
 424 {
 425     char *buf = new char[str.Length() + 1];
 426     wxStripMenuCodes((char*) (const char*) str, buf);
 427     wxString str1(buf);
 428     delete[] buf;
 429     return str1;
 430 }
 431
 432 /*
 433  * Window search functions
 434  *
 435  */
 436
 437 /*
 438  * If parent is non-NULL, look through children for a label or title
 439  * matching the specified string. If NULL, look through all top-level windows.
 440  *
 441  */
 442
 443 static wxWindow *wxFindWindowByLabel1 (const wxString& title, wxWindow * parent);
 444
 445 wxWindow *
 446 wxFindWindowByLabel (const wxString& title, wxWindow * parent)
 447 {
 448   if (parent)
 449     {
 450       return wxFindWindowByLabel1 (title, parent);
 451     }
 452   else
 453     {
 454       for (wxNode * node = wxTopLevelWindows.First (); node; node = node->Next ())
 455         {
 456           wxWindow *win = (wxWindow *) node->Data ();
 457           wxWindow *retwin = wxFindWindowByLabel1 (title, win);
 458           if (retwin)
 459             return retwin;
 460         }                        // for()
 461
 462     }
 463   return (wxWindow *) NULL;
 464 }
 465
 466 // Recursive
 467 static wxWindow *
 468 wxFindWindowByLabel1 (const wxString& title, wxWindow * parent)
 469 {
 470   if (parent)
 471     {
 472       if (parent->GetLabel() == title)
 473                 return parent;
 474     }
 475
 476   if (parent)
 477     {
 478       for (wxNode * node = parent->GetChildren().First (); node; node = node->Next ())
 479         {
 480           wxWindow *win = (wxWindow *) node->Data ();
 481           wxWindow *retwin = wxFindWindowByLabel1 (title, win);
 482           if (retwin)
 483             return retwin;
 484         }                        // for()
 485
 486     }
 487
 488   return (wxWindow *) NULL;                        // Not found
 489
 490 }
 491
 492 /*
 493  * If parent is non-NULL, look through children for a name
 494  * matching the specified string. If NULL, look through all top-level windows.
 495  *
 496  */
 497
 498 static wxWindow *wxFindWindowByName1 (const wxString& title, wxWindow * parent);
 499
 500 wxWindow *
 501 wxFindWindowByName (const wxString& title, wxWindow * parent)
 502 {
 503   if (parent)
 504     {
 505       return wxFindWindowByName1 (title, parent);
 506     }
 507   else
 508     {
 509       for (wxNode * node = wxTopLevelWindows.First (); node; node = node->Next ())
 510         {
 511           wxWindow *win = (wxWindow *) node->Data ();
 512           wxWindow *retwin = wxFindWindowByName1 (title, win);
 513           if (retwin)
 514             return retwin;
 515         }                        // for()
 516
 517     }
 518   // Failed? Try by label instead.
 519   return wxFindWindowByLabel(title, parent);
 520 }
 521
 522 // Recursive
 523 static wxWindow *
 524 wxFindWindowByName1 (const wxString& title, wxWindow * parent)
 525 {
 526   if (parent)
 527     {
 528             if ( parent->GetName() == title )
 529                         return parent;
 530     }
 531
 532   if (parent)
 533     {
 534       for (wxNode * node = parent->GetChildren().First (); node; node = node->Next ())
 535         {
 536           wxWindow *win = (wxWindow *) node->Data ();
 537           wxWindow *retwin = wxFindWindowByName1 (title, win);
 538           if (retwin)
 539             return retwin;
 540         }                        // for()
 541
 542     }
 543
 544   return (wxWindow *) NULL;                        // Not found
 545
 546 }
 547
 548 // Returns menu item id or -1 if none.
 549 int
 550 wxFindMenuItemId (wxFrame * frame, const wxString& menuString, const wxString& itemString)
 551 {
 552   wxMenuBar *menuBar = frame->GetMenuBar ();
 553   if (!menuBar)
 554     return -1;
 555   return menuBar->FindMenuItem (menuString, itemString);
 556 }
 557
 558 /*
 559 On Fri, 21 Jul 1995, Paul Craven wrote:
 560
 561 > Is there a way to find the path of running program's executable? I can get
 562 > my home directory, and the current directory, but I don't know how to get the
 563 > executable directory.
 564 >
 565
 566 The code below (warty as it is), does what you want on most Unix,
 567 DOS, and Mac platforms (it's from the ALS Prolog main).
 568
 569 || Ken Bowen      Applied Logic Systems, Inc.         PO Box 180,
 570 ||====            Voice:  +1 (617)965-9191            Newton Centre,
 571 ||                FAX:    +1 (617)965-1636            MA  02159  USA
 572                   Email:  ken@als.com        WWW: http://www.als.com
 573 ------------------------------------------------------------------------
 574 */
 575
 576 // This code is commented out but it may be integrated with wxWin at
 577 // a later date, after testing. Thanks Ken!
 578 #if 0
 579
 580 /*--------------------------------------------------------------------*
 581  | whereami is given a filename f in the form:  whereami(argv[0])
 582  | It returns the directory in which the executable file (containing
 583  | this code [main.c] ) may be found.  A dot will be returned to indicate
 584  | the current directory.
 585  *--------------------------------------------------------------------*/
 586
 587 static void
 588 whereami(name)
 589     char *name;
 590 {
 591     register char *cutoff = NULL;        /* stifle -Wall */
 592     register char *s;
 593     register char *t;
 594     int   cc;
 595     char  ebuf[4096];
 596
 597     /*
 598      * See if the file is accessible either through the current directory
 599      * or through an absolute path.
 600      */
 601
 602     if (access(name, R_OK) == 0) {
 603
 604         /*-------------------------------------------------------------*
 605          * The file was accessible without any other work.  But the current
 606          * working directory might change on us, so if it was accessible
 607          * through the cwd, then we should get it for later accesses.
 608          *-------------------------------------------------------------*/
 609
 610         t = imagedir;
 611         if (!absolute_pathname(name)) {
 612 #if defined(DOS) || defined(__WIN32__)
 613             int   drive;
 614             char *newrbuf;
 615
 616             newrbuf = imagedir;
 617 #ifndef __DJGPP__
 618             if (*(name + 1) == ':') {
 619                 if (*name >= 'a' && *name <= 'z')
 620                     drive = (int) (*name - 'a' + 1);
 621                 else
 622                     drive = (int) (*name - 'A' + 1);
 623                 *newrbuf++ = *name;
 624                 *newrbuf++ = *(name + 1);
 625                 *newrbuf++ = DIR_SEPARATOR;
 626             }
 627             else {
 628                 drive = 0;
 629                 *newrbuf++ = DIR_SEPARATOR;
 630             }
 631             if (getcwd(newrbuf, drive) == 0) {        /* } */
 632 #else
 633             if (getcwd(newrbuf, 1024) == 0) {        /* } */
 634 #endif
 635 #else  /* DOS */
 636 #ifdef HAVE_GETWD
 637             if (getwd(imagedir) == 0) {                /* } */
 638 #else  /* !HAVE_GETWD */
 639             if (getcwd(imagedir, 1024) == 0) {
 640 #endif /* !HAVE_GETWD */
 641 #endif /* DOS */
 642                 fatal_error(FE_GETCWD, 0);
 643             }
 644             for (; *t; t++)        /* Set t to end of buffer */
 645                 ;
 646             if (*(t - 1) == DIR_SEPARATOR)        /* leave slash if already
 647                                                  * last char
 648                                                  */
 649                 cutoff = t - 1;
 650             else {
 651                 cutoff = t;        /* otherwise put one in */
 652                 *t++ = DIR_SEPARATOR;
 653             }
 654         }
 655 #if (!defined(__MAC__) && !defined(__DJGPP__) && !defined(__GO32__) && !defined(__WIN32__))
 656         else
 657                 (*t++ = DIR_SEPARATOR);
 658 #endif
 659
 660         /*-------------------------------------------------------------*
 661          * Copy the rest of the string and set the cutoff if it was not
 662          * already set.  If the first character of name is a slash, cutoff
 663          * is not presently set but will be on the first iteration of the
 664          * loop below.
 665          *-------------------------------------------------------------*/
 666
 667         for ((*name == DIR_SEPARATOR ? (s = name+1) : (s = name));;) {
 668             if (*s == DIR_SEPARATOR)
 669                         cutoff = t;
 670             if (!(*t++ = *s++))
 671                         break;
 672         }
 673
 674     }
 675     else {
 676
 677         /*-------------------------------------------------------------*
 678          * Get the path list from the environment.  If the path list is
 679          * inaccessible for any reason, leave with fatal error.
 680          *-------------------------------------------------------------*/
 681
 682 #ifdef __MAC__
 683         if ((s = getenv("Commands")) == (char *) 0)
 684 #else
 685         if ((s = getenv("PATH")) == (char *) 0)
 686 #endif
 687             fatal_error(FE_PATH, 0);
 688
 689         /*
 690          * Copy path list into ebuf and set the source pointer to the
 691          * beginning of this buffer.
 692          */
 693
 694         strcpy(ebuf, s);
 695         s = ebuf;
 696
 697         for (;;) {
 698             t = imagedir;
 699             while (*s && *s != PATH_SEPARATOR)
 700                 *t++ = *s++;
 701             if (t > imagedir && *(t - 1) == DIR_SEPARATOR)
 702                 ;                /* do nothing -- slash already is in place */
 703             else
 704                 *t++ = DIR_SEPARATOR;        /* put in the slash */
 705             cutoff = t - 1;        /* set cutoff */
 706             strcpy(t, name);
 707             if (access(imagedir, R_OK) == 0)
 708                 break;
 709
 710             if (*s)
 711                 s++;                /* advance source pointer */
 712             else
 713                 fatal_error(FE_INFND, 0);
 714         }
 715
 716     }
 717
 718     /*-------------------------------------------------------------*
 719      | At this point the full pathname should exist in imagedir and
 720      | cutoff should be set to the final slash.  We must now determine
 721      | whether the file name is a symbolic link or not and chase it down
 722      | if it is.  Note that we reuse ebuf for getting the link.
 723      *-------------------------------------------------------------*/
 724
 725 #ifdef HAVE_SYMLINK
 726     while ((cc = readlink(imagedir, ebuf, 512)) != -1) {
 727         ebuf[cc] = 0;
 728         s = ebuf;
 729         if (*s == DIR_SEPARATOR) {
 730             t = imagedir;
 731         }
 732         else {
 733             t = cutoff + 1;
 734         }
 735         for (;;) {
 736             if (*s == DIR_SEPARATOR)
 737                 cutoff = t;        /* mark the last slash seen */
 738             if (!(*t++ = *s++))        /* copy the character */
 739                 break;
 740         }
 741     }
 742
 743 #endif /* HAVE_SYMLINK */
 744
 745     strcpy(imagename, cutoff + 1);        /* keep the image name */
 746     *(cutoff + 1) = 0;                /* chop off the filename part */
 747 }
 748
 749 #endif
 750
 751
 752 // Yield to other apps/messages and disable user input
 753 bool wxSafeYield(wxWindow *win)
 754 {
 755    wxNode *node;
 756    for ( node = wxTopLevelWindows.GetFirst();
 757          node;
 758          node = node->GetNext() )
 759       ((wxWindow*)node->GetData())->Enable(FALSE);
 760
 761    // always enable ourselves
 762    if(win) win->Enable(true);
 763    bool rc = wxYield();
 764
 765    for ( node = wxTopLevelWindows.GetFirst();
 766          node;
 767          node = node->GetNext() )
 768       ((wxWindow*)node->GetData())->Enable(TRUE);
 769    return rc;
 770 }
 771
 772 /*
 773  * N.B. these convenience functions must be separate from msgdlgg.cpp, textdlgg.cpp
 774  * since otherwise the generic code may be pulled in unnecessarily.
 775  */
 776
 777 int wxMessageBox(const wxString& message, const wxString& caption, long style,
 778                  wxWindow *parent, int WXUNUSED(x), int WXUNUSED(y) )
 779 {
 780     wxMessageDialog dialog(parent, message, caption, style);
 781
 782     int ans = dialog.ShowModal();
 783     switch ( ans )
 784     {
 785         case wxID_OK:
 786             return wxOK;
 787             break;
 788         case wxID_YES:
 789             return wxYES;
 790             break;
 791         case wxID_NO:
 792             return wxNO;
 793             break;
 794         default:
 795         case wxID_CANCEL:
 796             return wxCANCEL;
 797             break;
 798     }
 799     return ans;
 800 }
 801
 802 wxString wxGetTextFromUser(const wxString& message, const wxString& caption,
 803                         const wxString& defaultValue, wxWindow *parent,
 804                         int x, int y, bool WXUNUSED(centre) )
 805 {
 806     wxTextEntryDialog dialog(parent, message, caption, defaultValue, wxOK|wxCANCEL, wxPoint(x, y));
 807     if (dialog.ShowModal() == wxID_OK)
 808         return dialog.GetValue();
 809     else
 810         return wxString("");
 811 }
 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
 824
 825 bool wxGetUserId(wxString& buf)
 826 {
 827     bool success = wxGetUserId(wxBuffer, 500);
 828     if (success)
 829     {
 830         buf = wxBuffer;
 831         return TRUE;
 832     }
 833     else
 834         return FALSE;
 835 }
 836
 837 bool wxGetUserName(wxString& buf)
 838 {
 839     bool success = wxGetUserName(wxBuffer, 500);
 840     if (success)
 841     {
 842         buf = wxBuffer;
 843         return TRUE;
 844     }
 845     else
 846         return FALSE;
 847 }
 848
 849 bool wxGetHostName(wxString& buf)
 850 {
 851     static const size_t hostnameSize = 257;
 852     bool ok = wxGetHostName(buf.GetWriteBuf(hostnameSize), hostnameSize);
 853
 854     buf.UngetWriteBuf();
 855
 856     return ok;
 857 }
 858