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