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