src/common/utilscmn.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        utilscmn.cpp
   3 // Purpose:     Miscellaneous utility functions and classes
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     29/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1998 Julian Smart
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  21     #pragma implementation "utils.h"
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28     #pragma hdrstop
  29 #endif
  30
  31 #ifndef WX_PRECOMP
  32     #include "wx/defs.h"
  33     #include "wx/string.h"
  34     #include "wx/utils.h"
  35     #include "wx/intl.h"
  36     #include "wx/log.h"
  37
  38     #if wxUSE_GUI
  39         #include "wx/window.h"
  40         #include "wx/menu.h"
  41         #include "wx/frame.h"
  42         #include "wx/msgdlg.h"
  43         #include "wx/textdlg.h"
  44         #if wxUSE_ACCEL
  45             #include "wx/menuitem.h"
  46             #include "wx/accel.h"
  47         #endif // wxUSE_ACCEL
  48     #endif // wxUSE_GUI
  49 #endif // WX_PRECOMP
  50
  51 #include <ctype.h>
  52 #include <stdio.h>
  53 #include <stdlib.h>
  54 #include <string.h>
  55
  56 #if !defined(__WATCOMC__)
  57     #if !(defined(_MSC_VER) && (_MSC_VER > 800))
  58         #include <errno.h>
  59     #endif
  60 #endif
  61
  62 #include <time.h>
  63
  64 #ifndef __MWERKS__
  65     #include <sys/types.h>
  66     #include <sys/stat.h>
  67 #endif
  68
  69 #ifdef __SALFORDC__
  70     #include <clib.h>
  71 #endif
  72
  73 // Pattern matching code. (FIXME)
  74 // Yes, this path is deliberate (for Borland compilation)
  75 #ifdef wx_mac /* MATTHEW: [5] Mac doesn't like paths with "/" */
  76 #include "glob.inc"
  77 #else
  78 #include "../common/glob.inc"
  79 #endif
  80
  81 #ifdef __WXMSW__
  82     #include "windows.h"
  83 #endif
  84
  85 // ----------------------------------------------------------------------------
  86 // function protoypes
  87 // ----------------------------------------------------------------------------
  88
  89 #if wxUSE_GUI
  90     static wxWindow *wxFindWindowByLabel1(const wxString& title, wxWindow *parent);
  91     static wxWindow *wxFindWindowByName1 (const wxString& title, wxWindow *parent);
  92 #endif // wxUSE_GUI
  93
  94 // ============================================================================
  95 // implementation
  96 // ============================================================================
  97
  98 // ----------------------------------------------------------------------------
  99 // string functions
 100 // ----------------------------------------------------------------------------
 101
 102 #ifdef __WXMAC__
 103 int strcasecmp(const char *str_1, const char *str_2)
 104 {
 105   register char c1, c2;
 106   do {
 107     c1 = tolower(*str_1++);
 108     c2 = tolower(*str_2++);
 109   } while ( c1 && (c1 == c2) );
 110
 111   return c1 - c2;
 112 }
 113
 114 int strncasecmp(const char *str_1, const char *str_2, size_t maxchar)
 115 {
 116
 117   register char c1, c2;
 118   while( maxchar--)
 119   {
 120     c1 = tolower(*str_1++);
 121     c2 = tolower(*str_2++);
 122
 123     if ( !c1 || c1!=c2 )
 124                   return c1 - c2;
 125
 126   } ;
 127
 128   return 0 ;
 129
 130 }
 131 #endif // wxMAC
 132
 133 #if defined( __VMS__ ) && ( __VMS_VER < 70000000 )
 134 // we have no strI functions under VMS, therefore I have implemented
 135 // an inefficient but portable version: convert copies of strings to lowercase
 136 // and then use the normal comparison
 137 static void myLowerString(char *s)
 138 {
 139   while(*s){
 140     if(isalpha(*s)) *s = (char)tolower(*s);
 141     s++;
 142   }
 143 }
 144
 145 int strcasecmp(const char *str_1, const char *str_2)
 146 {
 147   char *temp1 = new char[strlen(str_1)+1];
 148   char *temp2 = new char[strlen(str_2)+1];
 149   strcpy(temp1,str_1);
 150   strcpy(temp2,str_2);
 151   myLowerString(temp1);
 152   myLowerString(temp2);
 153
 154   int result = wxStrcmp(temp1,temp2);
 155   delete[] temp1;
 156   delete[] temp2;
 157
 158   return(result);
 159 }
 160
 161 int strncasecmp(const char *str_1, const char *str_2, size_t maxchar)
 162 {
 163   char *temp1 = new char[strlen(str_1)+1];
 164   char *temp2 = new char[strlen(str_2)+1];
 165   strcpy(temp1,str_1);
 166   strcpy(temp2,str_2);
 167   myLowerString(temp1);
 168   myLowerString(temp2);
 169
 170   int result = strncmp(temp1,temp2,maxchar);
 171   delete[] temp1;
 172   delete[] temp2;
 173
 174   return(result);
 175 }
 176 #endif // __VMS__
 177
 178 #ifdef __WINDOWS__
 179
 180 #ifndef __GNUWIN32__
 181 #ifndef __MWERKS__
 182 #define strcasecmp stricmp
 183 #define strncasecmp strnicmp
 184 #else
 185 #define strcasecmp _stricmp
 186 #define strncasecmp _strnicmp
 187 #endif
 188 #endif
 189
 190 #else
 191
 192 #ifdef __EMX__
 193 #define strcasecmp stricmp
 194 #define strncasecmp strnicmp
 195 #endif
 196
 197 // This declaration is missing in SunOS!
 198 // (Yes, I know it is NOT ANSI-C but its in BSD libc)
 199 #if defined(__xlC) || defined(__AIX__) || defined(__GNUG__)
 200 extern "C"
 201 {
 202   int strcasecmp (const char *, const char *);
 203   int strncasecmp (const char *, const char *, size_t);
 204 }
 205 #endif
 206 #endif  /* __WXMSW__ */
 207
 208 #ifdef __WXPM__
 209 #define strcasecmp stricmp
 210 #define strncasecmp strnicmp
 211 #endif
 212
 213 wxChar *
 214 copystring (const wxChar *s)
 215 {
 216   if (s == NULL) s = wxT("");
 217   size_t len = wxStrlen (s) + 1;
 218
 219   wxChar *news = new wxChar[len];
 220   memcpy (news, s, len * sizeof(wxChar));    // Should be the fastest
 221
 222   return news;
 223 }
 224
 225 // Id generation
 226 static long wxCurrentId = 100;
 227
 228 long
 229 wxNewId (void)
 230 {
 231   return wxCurrentId++;
 232 }
 233
 234 long
 235 wxGetCurrentId(void) { return wxCurrentId; }
 236
 237 void
 238 wxRegisterId (long id)
 239 {
 240   if (id >= wxCurrentId)
 241     wxCurrentId = id + 1;
 242 }
 243
 244 void
 245 StringToFloat (wxChar *s, float *number)
 246 {
 247   if (s && *s && number)
 248     *number = (float) wxStrtod (s, (wxChar **) NULL);
 249 }
 250
 251 void
 252 StringToDouble (wxChar *s, double *number)
 253 {
 254   if (s && *s && number)
 255     *number = wxStrtod (s, (wxChar **) NULL);
 256 }
 257
 258 wxChar *
 259 FloatToString (float number, const wxChar *fmt)
 260 {
 261   static wxChar buf[256];
 262
 263 //  sprintf (buf, "%.2f", number);
 264   wxSprintf (buf, fmt, number);
 265   return buf;
 266 }
 267
 268 wxChar *
 269 DoubleToString (double number, const wxChar *fmt)
 270 {
 271   static wxChar buf[256];
 272
 273   wxSprintf (buf, fmt, number);
 274   return buf;
 275 }
 276
 277 void
 278 StringToInt (wxChar *s, int *number)
 279 {
 280   if (s && *s && number)
 281     *number = (int) wxStrtol (s, (wxChar **) NULL, 10);
 282 }
 283
 284 void
 285 StringToLong (wxChar *s, long *number)
 286 {
 287   if (s && *s && number)
 288     *number = wxStrtol (s, (wxChar **) NULL, 10);
 289 }
 290
 291 wxChar *
 292 IntToString (int number)
 293 {
 294   static wxChar buf[20];
 295
 296   wxSprintf (buf, wxT("%d"), number);
 297   return buf;
 298 }
 299
 300 wxChar *
 301 LongToString (long number)
 302 {
 303   static wxChar buf[20];
 304
 305   wxSprintf (buf, wxT("%ld"), number);
 306   return buf;
 307 }
 308
 309 // Array used in DecToHex conversion routine.
 310 static wxChar hexArray[] = wxT("0123456789ABCDEF");
 311
 312 // Convert 2-digit hex number to decimal
 313 int wxHexToDec(const wxString& buf)
 314 {
 315   int firstDigit, secondDigit;
 316
 317   if (buf.GetChar(0) >= wxT('A'))
 318     firstDigit = buf.GetChar(0) - wxT('A') + 10;
 319   else
 320     firstDigit = buf.GetChar(0) - wxT('0');
 321
 322   if (buf.GetChar(1) >= wxT('A'))
 323     secondDigit = buf.GetChar(1) - wxT('A') + 10;
 324   else
 325     secondDigit = buf.GetChar(1) - wxT('0');
 326
 327   return firstDigit * 16 + secondDigit;
 328 }
 329
 330 // Convert decimal integer to 2-character hex string
 331 void wxDecToHex(int dec, wxChar *buf)
 332 {
 333   int firstDigit = (int)(dec/16.0);
 334   int secondDigit = (int)(dec - (firstDigit*16.0));
 335   buf[0] = hexArray[firstDigit];
 336   buf[1] = hexArray[secondDigit];
 337   buf[2] = 0;
 338 }
 339
 340 // Convert decimal integer to 2-character hex string
 341 wxString wxDecToHex(int dec)
 342 {
 343     wxChar buf[3];
 344     wxDecToHex(dec, buf);
 345     return wxString(buf);
 346 }
 347
 348 // Match a string INDEPENDENT OF CASE
 349 bool
 350 StringMatch (char *str1, char *str2, bool subString, bool exact)
 351 {
 352   if (str1 == NULL || str2 == NULL)
 353     return FALSE;
 354   if (str1 == str2)
 355     return TRUE;
 356
 357   if (subString)
 358     {
 359       int len1 = strlen (str1);
 360       int len2 = strlen (str2);
 361       int i;
 362
 363       // Search for str1 in str2
 364       // Slow .... but acceptable for short strings
 365       for (i = 0; i <= len2 - len1; i++)
 366         {
 367           if (strncasecmp (str1, str2 + i, len1) == 0)
 368             return TRUE;
 369         }
 370     }
 371   else if (exact)
 372     {
 373       if (strcasecmp (str1, str2) == 0)
 374         return TRUE;
 375     }
 376   else
 377     {
 378       int len1 = strlen (str1);
 379       int len2 = strlen (str2);
 380
 381       if (strncasecmp (str1, str2, wxMin (len1, len2)) == 0)
 382         return TRUE;
 383     }
 384
 385   return FALSE;
 386 }
 387
 388 // Return the current date/time
 389 // [volatile]
 390 wxString wxNow()
 391 {
 392   time_t now = time((time_t *) NULL);
 393   char *date = ctime(&now);
 394   date[24] = '\0';
 395   return wxString(date);
 396 }
 397
 398 #if wxUSE_GUI
 399
 400 // ----------------------------------------------------------------------------
 401 // Menu accelerators related functions
 402 // ----------------------------------------------------------------------------
 403
 404 wxChar *wxStripMenuCodes (wxChar *in, wxChar *out)
 405 {
 406   if (!in)
 407     return (wxChar *) NULL;
 408
 409   if (!out)
 410     out = copystring(in);
 411
 412   wxChar *tmpOut = out;
 413
 414   while (*in)
 415     {
 416       if (*in == wxT('&'))
 417         {
 418           // Check && -> &, &x -> x
 419           if (*++in == wxT('&'))
 420             *out++ = *in++;
 421         }
 422       else if (*in == wxT('\t'))
 423         {
 424           // Remove all stuff after \t in X mode, and let the stuff as is
 425           // in Windows mode.
 426           // Accelerators are handled in wx_item.cc for Motif, and are not
 427           // YET supported in XView
 428           break;
 429         }
 430       else
 431         *out++ = *in++;
 432     }                                // while
 433
 434   *out = wxT('\0');
 435
 436   return tmpOut;
 437 }
 438
 439 wxString wxStripMenuCodes(const wxString& str)
 440 {
 441     wxChar *buf = new wxChar[str.Length() + 1];
 442     wxStripMenuCodes(WXSTRINGCAST str, buf);
 443     wxString str1(buf);
 444     delete[] buf;
 445     return str1;
 446 }
 447
 448 #if wxUSE_ACCEL
 449
 450 // return wxAcceleratorEntry for the given menu string or NULL if none
 451 // specified
 452 wxAcceleratorEntry *wxGetAccelFromString(const wxString& label)
 453 {
 454     // check for accelerators: they are given after '\t'
 455     int posTab = label.Find(wxT('\t'));
 456     if ( posTab != wxNOT_FOUND ) {
 457         // parse the accelerator string
 458         int keyCode = 0;
 459         int accelFlags = wxACCEL_NORMAL;
 460         wxString current;
 461         for ( size_t n = (size_t)posTab + 1; n < label.Len(); n++ ) {
 462             if ( (label[n] == '+') || (label[n] == '-') ) {
 463                 if ( current == _("ctrl") )
 464                     accelFlags |= wxACCEL_CTRL;
 465                 else if ( current == _("alt") )
 466                     accelFlags |= wxACCEL_ALT;
 467                 else if ( current == _("shift") )
 468                     accelFlags |= wxACCEL_SHIFT;
 469                 else {
 470                     wxLogDebug(wxT("Unknown accel modifier: '%s'"),
 471                                current.c_str());
 472                 }
 473
 474                 current.Empty();
 475             }
 476             else {
 477                 current += wxTolower(label[n]);
 478             }
 479         }
 480
 481         if ( current.IsEmpty() ) {
 482             wxLogDebug(wxT("No accel key found, accel string ignored."));
 483         }
 484         else {
 485             if ( current.Len() == 1 ) {
 486                 // it's a letter
 487                 keyCode = wxToupper(current[0U]);
 488             }
 489             else {
 490                 // is it a function key?
 491                 if ( current[0U] == 'f' && isdigit(current[1U]) &&
 492                      (current.Len() == 2 ||
 493                      (current.Len() == 3 && isdigit(current[2U]))) ) {
 494                     int n;
 495                     wxSscanf(current.c_str() + 1, wxT("%d"), &n);
 496
 497                     keyCode = WXK_F1 + n - 1;
 498                 }
 499                 else {
 500 #if 0 // this is not supported by GTK+, apparently
 501                     // several special cases
 502                     current.MakeUpper();
 503                     if ( current == wxT("DEL") ) {
 504                         keyCode = VK_DELETE;
 505                     }
 506                     else if ( current == wxT("PGUP") ) {
 507                         keyCode = VK_PRIOR;
 508                     }
 509                     else if ( current == wxT("PGDN") ) {
 510                         keyCode = VK_NEXT;
 511                     }
 512                     else
 513 #endif // 0
 514                     {
 515                         wxLogDebug(wxT("Unrecognized accel key '%s', accel "
 516                                        "string ignored."), current.c_str());
 517                     }
 518                 }
 519             }
 520         }
 521
 522         if ( keyCode ) {
 523             // we do have something
 524             return new wxAcceleratorEntry(accelFlags, keyCode);
 525         }
 526     }
 527
 528     return (wxAcceleratorEntry *)NULL;
 529 }
 530
 531 #endif // wxUSE_ACCEL
 532
 533 // ----------------------------------------------------------------------------
 534 // Window search functions
 535 // ----------------------------------------------------------------------------
 536
 537 /*
 538  * If parent is non-NULL, look through children for a label or title
 539  * matching the specified string. If NULL, look through all top-level windows.
 540  *
 541  */
 542
 543 wxWindow *
 544 wxFindWindowByLabel (const wxString& title, wxWindow * parent)
 545 {
 546     if (parent)
 547     {
 548         return wxFindWindowByLabel1(title, parent);
 549     }
 550     else
 551     {
 552         for ( wxWindowList::Node * node = wxTopLevelWindows.GetFirst();
 553               node;
 554               node = node->GetNext() )
 555         {
 556             wxWindow *win = node->GetData();
 557             wxWindow *retwin = wxFindWindowByLabel1 (title, win);
 558             if (retwin)
 559                 return retwin;
 560         }                        // for()
 561
 562     }
 563     return (wxWindow *) NULL;
 564 }
 565
 566 // Recursive
 567 static wxWindow *
 568 wxFindWindowByLabel1 (const wxString& title, wxWindow * parent)
 569 {
 570     if (parent)
 571     {
 572         if (parent->GetLabel() == title)
 573             return parent;
 574     }
 575
 576     if (parent)
 577     {
 578         for ( wxWindowList::Node * node = parent->GetChildren().GetFirst();
 579               node;
 580               node = node->GetNext() )
 581         {
 582             wxWindow *win = (wxWindow *)node->GetData();
 583             wxWindow *retwin = wxFindWindowByLabel1 (title, win);
 584             if (retwin)
 585                 return retwin;
 586         }
 587
 588     }
 589
 590     return (wxWindow *) NULL;                        // Not found
 591 }
 592
 593 /*
 594  * If parent is non-NULL, look through children for a name
 595  * matching the specified string. If NULL, look through all top-level windows.
 596  *
 597  */
 598
 599 wxWindow *
 600 wxFindWindowByName (const wxString& title, wxWindow * parent)
 601 {
 602     if (parent)
 603     {
 604         return wxFindWindowByName1 (title, parent);
 605     }
 606     else
 607     {
 608         for ( wxWindowList::Node * node = wxTopLevelWindows.GetFirst();
 609               node;
 610               node = node->GetNext() )
 611         {
 612             wxWindow *win = node->GetData();
 613             wxWindow *retwin = wxFindWindowByName1 (title, win);
 614             if (retwin)
 615                 return retwin;
 616         }
 617
 618     }
 619
 620     // Failed? Try by label instead.
 621     return wxFindWindowByLabel(title, parent);
 622 }
 623
 624 // Recursive
 625 static wxWindow *
 626 wxFindWindowByName1 (const wxString& title, wxWindow * parent)
 627 {
 628   if (parent)
 629     {
 630             if ( parent->GetName() == title )
 631                         return parent;
 632     }
 633
 634   if (parent)
 635     {
 636       for (wxNode * node = parent->GetChildren().First (); node; node = node->Next ())
 637         {
 638           wxWindow *win = (wxWindow *) node->Data ();
 639           wxWindow *retwin = wxFindWindowByName1 (title, win);
 640           if (retwin)
 641             return retwin;
 642         }                        // for()
 643
 644     }
 645
 646   return (wxWindow *) NULL;                        // Not found
 647
 648 }
 649
 650 // Returns menu item id or -1 if none.
 651 int
 652 wxFindMenuItemId (wxFrame * frame, const wxString& menuString, const wxString& itemString)
 653 {
 654   wxMenuBar *menuBar = frame->GetMenuBar ();
 655   if (!menuBar)
 656     return -1;
 657   return menuBar->FindMenuItem (menuString, itemString);
 658 }
 659
 660 #endif // wxUSE_GUI
 661
 662 /*
 663 On Fri, 21 Jul 1995, Paul Craven wrote:
 664
 665 > Is there a way to find the path of running program's executable? I can get
 666 > my home directory, and the current directory, but I don't know how to get the
 667 > executable directory.
 668 >
 669
 670 The code below (warty as it is), does what you want on most Unix,
 671 DOS, and Mac platforms (it's from the ALS Prolog main).
 672
 673 || Ken Bowen      Applied Logic Systems, Inc.         PO Box 180,
 674 ||====            Voice:  +1 (617)965-9191            Newton Centre,
 675 ||                FAX:    +1 (617)965-1636            MA  02159  USA
 676                   Email:  ken@als.com        WWW: http://www.als.com
 677 ------------------------------------------------------------------------
 678 */
 679
 680 // This code is commented out but it may be integrated with wxWin at
 681 // a later date, after testing. Thanks Ken!
 682 #if 0
 683
 684 /*--------------------------------------------------------------------*
 685  | whereami is given a filename f in the form:  whereami(argv[0])
 686  | It returns the directory in which the executable file (containing
 687  | this code [main.c] ) may be found.  A dot will be returned to indicate
 688  | the current directory.
 689  *--------------------------------------------------------------------*/
 690
 691 static void
 692 whereami(name)
 693     char *name;
 694 {
 695     register char *cutoff = NULL;        /* stifle -Wall */
 696     register char *s;
 697     register char *t;
 698     int   cc;
 699     char  ebuf[4096];
 700
 701     /*
 702      * See if the file is accessible either through the current directory
 703      * or through an absolute path.
 704      */
 705
 706     if (access(name, R_OK) == 0) {
 707
 708         /*-------------------------------------------------------------*
 709          * The file was accessible without any other work.  But the current
 710          * working directory might change on us, so if it was accessible
 711          * through the cwd, then we should get it for later accesses.
 712          *-------------------------------------------------------------*/
 713
 714         t = imagedir;
 715         if (!absolute_pathname(name)) {
 716 #if defined(DOS) || defined(__WIN32__)
 717             int   drive;
 718             char *newrbuf;
 719
 720             newrbuf = imagedir;
 721 #ifndef __DJGPP__
 722             if (*(name + 1) == ':') {
 723                 if (*name >= 'a' && *name <= 'z')
 724                     drive = (int) (*name - 'a' + 1);
 725                 else
 726                     drive = (int) (*name - 'A' + 1);
 727                 *newrbuf++ = *name;
 728                 *newrbuf++ = *(name + 1);
 729                 *newrbuf++ = DIR_SEPARATOR;
 730             }
 731             else {
 732                 drive = 0;
 733                 *newrbuf++ = DIR_SEPARATOR;
 734             }
 735             if (getcwd(newrbuf, drive) == 0) {        /* } */
 736 #else
 737             if (getcwd(newrbuf, 1024) == 0) {        /* } */
 738 #endif
 739 #else  /* DOS */
 740 #ifdef HAVE_GETWD
 741             if (getwd(imagedir) == 0) {                /* } */
 742 #else  /* !HAVE_GETWD */
 743             if (getcwd(imagedir, 1024) == 0) {
 744 #endif /* !HAVE_GETWD */
 745 #endif /* DOS */
 746                 fatal_error(FE_GETCWD, 0);
 747             }
 748             for (; *t; t++)        /* Set t to end of buffer */
 749                 ;
 750             if (*(t - 1) == DIR_SEPARATOR)        /* leave slash if already
 751                                                  * last char
 752                                                  */
 753                 cutoff = t - 1;
 754             else {
 755                 cutoff = t;        /* otherwise put one in */
 756                 *t++ = DIR_SEPARATOR;
 757             }
 758         }
 759 #if (!defined(__MAC__) && !defined(__DJGPP__) && !defined(__GO32__) && !defined(__WIN32__))
 760         else
 761                 (*t++ = DIR_SEPARATOR);
 762 #endif
 763
 764         /*-------------------------------------------------------------*
 765          * Copy the rest of the string and set the cutoff if it was not
 766          * already set.  If the first character of name is a slash, cutoff
 767          * is not presently set but will be on the first iteration of the
 768          * loop below.
 769          *-------------------------------------------------------------*/
 770
 771         for ((*name == DIR_SEPARATOR ? (s = name+1) : (s = name));;) {
 772             if (*s == DIR_SEPARATOR)
 773                         cutoff = t;
 774             if (!(*t++ = *s++))
 775                         break;
 776         }
 777
 778     }
 779     else {
 780
 781         /*-------------------------------------------------------------*
 782          * Get the path list from the environment.  If the path list is
 783          * inaccessible for any reason, leave with fatal error.
 784          *-------------------------------------------------------------*/
 785
 786 #ifdef __MAC__
 787         if ((s = getenv("Commands")) == (char *) 0)
 788 #else
 789         if ((s = getenv("PATH")) == (char *) 0)
 790 #endif
 791             fatal_error(FE_PATH, 0);
 792
 793         /*
 794          * Copy path list into ebuf and set the source pointer to the
 795          * beginning of this buffer.
 796          */
 797
 798         strcpy(ebuf, s);
 799         s = ebuf;
 800
 801         for (;;) {
 802             t = imagedir;
 803             while (*s && *s != PATH_SEPARATOR)
 804                 *t++ = *s++;
 805             if (t > imagedir && *(t - 1) == DIR_SEPARATOR)
 806                 ;                /* do nothing -- slash already is in place */
 807             else
 808                 *t++ = DIR_SEPARATOR;        /* put in the slash */
 809             cutoff = t - 1;        /* set cutoff */
 810             strcpy(t, name);
 811             if (access(imagedir, R_OK) == 0)
 812                 break;
 813
 814             if (*s)
 815                 s++;                /* advance source pointer */
 816             else
 817                 fatal_error(FE_INFND, 0);
 818         }
 819
 820     }
 821
 822     /*-------------------------------------------------------------*
 823      | At this point the full pathname should exist in imagedir and
 824      | cutoff should be set to the final slash.  We must now determine
 825      | whether the file name is a symbolic link or not and chase it down
 826      | if it is.  Note that we reuse ebuf for getting the link.
 827      *-------------------------------------------------------------*/
 828
 829 #ifdef HAVE_SYMLINK
 830     while ((cc = readlink(imagedir, ebuf, 512)) != -1) {
 831         ebuf[cc] = 0;
 832         s = ebuf;
 833         if (*s == DIR_SEPARATOR) {
 834             t = imagedir;
 835         }
 836         else {
 837             t = cutoff + 1;
 838         }
 839         for (;;) {
 840             if (*s == DIR_SEPARATOR)
 841                 cutoff = t;        /* mark the last slash seen */
 842             if (!(*t++ = *s++))        /* copy the character */
 843                 break;
 844         }
 845     }
 846
 847 #endif /* HAVE_SYMLINK */
 848
 849     strcpy(imagename, cutoff + 1);        /* keep the image name */
 850     *(cutoff + 1) = 0;                /* chop off the filename part */
 851 }
 852
 853 #endif
 854
 855 #if wxUSE_GUI
 856
 857 // ----------------------------------------------------------------------------
 858 // GUI helpers
 859 // ----------------------------------------------------------------------------
 860
 861 /*
 862  * N.B. these convenience functions must be separate from msgdlgg.cpp, textdlgg.cpp
 863  * since otherwise the generic code may be pulled in unnecessarily.
 864  */
 865
 866 int wxMessageBox(const wxString& message, const wxString& caption, long style,
 867                  wxWindow *parent, int WXUNUSED(x), int WXUNUSED(y) )
 868 {
 869     wxMessageDialog dialog(parent, message, caption, style);
 870
 871     int ans = dialog.ShowModal();
 872     switch ( ans )
 873     {
 874         case wxID_OK:
 875             return wxOK;
 876             break;
 877         case wxID_YES:
 878             return wxYES;
 879             break;
 880         case wxID_NO:
 881             return wxNO;
 882             break;
 883         default:
 884         case wxID_CANCEL:
 885             return wxCANCEL;
 886             break;
 887     }
 888     return ans;
 889 }
 890
 891 #if wxUSE_TEXTDLG
 892 wxString wxGetTextFromUser(const wxString& message, const wxString& caption,
 893                         const wxString& defaultValue, wxWindow *parent,
 894                         int x, int y, bool WXUNUSED(centre) )
 895 {
 896     wxTextEntryDialog dialog(parent, message, caption, defaultValue, wxOK|wxCANCEL, wxPoint(x, y));
 897     if (dialog.ShowModal() == wxID_OK)
 898         return dialog.GetValue();
 899     else
 900         return wxString("");
 901 }
 902 #endif // wxUSE_TEXTDLG
 903
 904 #ifdef __MWERKS__
 905 char *strdup(const char *s)
 906 {
 907         return strcpy( (char*) malloc( strlen( s ) + 1 ) , s ) ;
 908 }
 909
 910 int isascii( int c )
 911 {
 912         return ( c >= 0 && c < 128 ) ;
 913 }
 914 #endif // __MWERKS__
 915
 916 // ----------------------------------------------------------------------------
 917 // misc functions
 918 // ----------------------------------------------------------------------------
 919
 920 void wxEnableTopLevelWindows(bool enable)
 921 {
 922    wxWindowList::Node *node;
 923    for ( node = wxTopLevelWindows.GetFirst(); node; node = node->GetNext() )
 924       node->GetData()->Enable(enable);
 925 }
 926
 927 // Yield to other apps/messages and disable user input
 928 bool wxSafeYield(wxWindow *win)
 929 {
 930    wxEnableTopLevelWindows(FALSE);
 931    // always enable ourselves
 932    if ( win )
 933       win->Enable(TRUE);
 934    bool rc = wxYield();
 935    wxEnableTopLevelWindows(TRUE);
 936    return rc;
 937 }
 938
 939 // Don't synthesize KeyUp events holding down a key and producing KeyDown
 940 // events with autorepeat. On by default and always on in wxMSW. wxGTK version
 941 // in utilsgtk.cpp.
 942 #ifndef __WXGTK__
 943 bool wxSetDetectableAutoRepeat( bool WXUNUSED(flag) )
 944 {
 945    return TRUE;          // detectable auto-repeat is the only mode MSW supports
 946 }
 947 #endif // !wxGTK
 948
 949 #endif // wxUSE_GUI
 950
 951 // ----------------------------------------------------------------------------
 952 // network and user id functions
 953 // ----------------------------------------------------------------------------
 954
 955 // Get Full RFC822 style email address
 956 bool wxGetEmailAddress(wxChar *address, int maxSize)
 957 {
 958     wxString email = wxGetEmailAddress();
 959     if ( !email )
 960         return FALSE;
 961
 962     wxStrncpy(address, email, maxSize - 1);
 963     address[maxSize - 1] = wxT('\0');
 964
 965     return TRUE;
 966 }
 967
 968 wxString wxGetEmailAddress()
 969 {
 970     wxString email;
 971
 972     wxString host = wxGetHostName();
 973     if ( !!host )
 974     {
 975         wxString user = wxGetUserId();
 976         if ( !!user )
 977         {
 978             wxString email(user);
 979             email << wxT('@') << host;
 980         }
 981     }
 982
 983     return email;
 984 }
 985
 986 wxString wxGetUserId()
 987 {
 988     static const int maxLoginLen = 256; // FIXME arbitrary number
 989
 990     wxString buf;
 991     bool ok = wxGetUserId(buf.GetWriteBuf(maxLoginLen), maxLoginLen);
 992     buf.UngetWriteBuf();
 993
 994     if ( !ok )
 995         buf.Empty();
 996
 997     return buf;
 998 }
 999
1000 wxString wxGetUserName()
1001 {
1002     static const int maxUserNameLen = 1024; // FIXME arbitrary number
1003
1004     wxString buf;
1005     bool ok = wxGetUserName(buf.GetWriteBuf(maxUserNameLen), maxUserNameLen);
1006     buf.UngetWriteBuf();
1007
1008     if ( !ok )
1009         buf.Empty();
1010
1011     return buf;
1012 }
1013
1014 wxString wxGetHostName()
1015 {
1016     static const size_t hostnameSize = 257;
1017
1018     wxString buf;
1019     bool ok = wxGetHostName(buf.GetWriteBuf(hostnameSize), hostnameSize);
1020
1021     buf.UngetWriteBuf();
1022
1023     if ( !ok )
1024         buf.Empty();
1025
1026     return buf;
1027 }
1028
1029 wxString wxGetFullHostName()
1030 {
1031     static const size_t hostnameSize = 257;
1032
1033     wxString buf;
1034     bool ok = wxGetFullHostName(buf.GetWriteBuf(hostnameSize), hostnameSize);
1035
1036     buf.UngetWriteBuf();
1037
1038     if ( !ok )
1039         buf.Empty();
1040
1041     return buf;
1042 }
1043
1044 wxString wxGetHomeDir()
1045 {
1046     wxString home;
1047     wxGetHomeDir(&home);
1048
1049     return home;
1050 }