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 #ifndef __WIN16__
  52 #include "wx/process.h"
  53 #include "wx/txtstrm.h"
  54 #endif
  55
  56 #include <ctype.h>
  57 #include <stdio.h>
  58 #include <stdlib.h>
  59 #include <string.h>
  60
  61 #if !defined(__WATCOMC__)
  62     #if !(defined(_MSC_VER) && (_MSC_VER > 800))
  63         #include <errno.h>
  64     #endif
  65 #endif
  66
  67 #if wxUSE_GUI
  68     #include "wx/colordlg.h"
  69 #endif // wxUSE_GUI
  70
  71 #include <time.h>
  72
  73 #ifndef __MWERKS__
  74     #include <sys/types.h>
  75     #include <sys/stat.h>
  76 #endif
  77
  78 #ifdef __SALFORDC__
  79     #include <clib.h>
  80 #endif
  81
  82 #ifdef __WXMSW__
  83     #include "wx/msw/private.h"
  84 #endif
  85
  86 // ----------------------------------------------------------------------------
  87 // function protoypes
  88 // ----------------------------------------------------------------------------
  89
  90 #if wxUSE_GUI
  91     static wxWindow *wxFindWindowByLabel1(const wxString& title, wxWindow *parent);
  92     static wxWindow *wxFindWindowByName1 (const wxString& title, wxWindow *parent);
  93 #endif // wxUSE_GUI
  94
  95 // ============================================================================
  96 // implementation
  97 // ============================================================================
  98
  99 // ----------------------------------------------------------------------------
 100 // string functions
 101 // ----------------------------------------------------------------------------
 102
 103 #ifdef __WXMAC__
 104 int strcasecmp(const char *str_1, const char *str_2)
 105 {
 106   register char c1, c2;
 107   do {
 108     c1 = tolower(*str_1++);
 109     c2 = tolower(*str_2++);
 110   } while ( c1 && (c1 == c2) );
 111
 112   return c1 - c2;
 113 }
 114
 115 int strncasecmp(const char *str_1, const char *str_2, size_t maxchar)
 116 {
 117
 118   register char c1, c2;
 119   while( maxchar--)
 120   {
 121     c1 = tolower(*str_1++);
 122     c2 = tolower(*str_2++);
 123
 124     if ( !c1 || c1!=c2 )
 125                   return c1 - c2;
 126
 127   } ;
 128
 129   return 0 ;
 130
 131 }
 132 #endif // wxMAC
 133
 134 #if defined( __VMS__ ) && ( __VMS_VER < 70000000 )
 135 // we have no strI functions under VMS, therefore I have implemented
 136 // an inefficient but portable version: convert copies of strings to lowercase
 137 // and then use the normal comparison
 138 static void myLowerString(char *s)
 139 {
 140   while(*s){
 141     if(isalpha(*s)) *s = (char)tolower(*s);
 142     s++;
 143   }
 144 }
 145
 146 int strcasecmp(const char *str_1, const char *str_2)
 147 {
 148   char *temp1 = new char[strlen(str_1)+1];
 149   char *temp2 = new char[strlen(str_2)+1];
 150   strcpy(temp1,str_1);
 151   strcpy(temp2,str_2);
 152   myLowerString(temp1);
 153   myLowerString(temp2);
 154
 155   int result = wxStrcmp(temp1,temp2);
 156   delete[] temp1;
 157   delete[] temp2;
 158
 159   return(result);
 160 }
 161
 162 int strncasecmp(const char *str_1, const char *str_2, size_t maxchar)
 163 {
 164   char *temp1 = new char[strlen(str_1)+1];
 165   char *temp2 = new char[strlen(str_2)+1];
 166   strcpy(temp1,str_1);
 167   strcpy(temp2,str_2);
 168   myLowerString(temp1);
 169   myLowerString(temp2);
 170
 171   int result = strncmp(temp1,temp2,maxchar);
 172   delete[] temp1;
 173   delete[] temp2;
 174
 175   return(result);
 176 }
 177 #endif // __VMS__
 178
 179 #ifdef __WINDOWS__
 180
 181 #ifndef __GNUWIN32__
 182 #ifndef __MWERKS__
 183 #define strcasecmp stricmp
 184 #define strncasecmp strnicmp
 185 #else
 186 #define strcasecmp _stricmp
 187 #define strncasecmp _strnicmp
 188 #endif
 189 #endif
 190
 191 #else
 192
 193 #ifdef __EMX__
 194 #define strcasecmp stricmp
 195 #define strncasecmp strnicmp
 196 #endif
 197
 198 // This declaration is missing in SunOS!
 199 // (Yes, I know it is NOT ANSI-C but its in BSD libc)
 200 #if defined(__xlC) || defined(__AIX__) || defined(__GNUG__)
 201 extern "C"
 202 {
 203   int strcasecmp (const char *, const char *);
 204   int strncasecmp (const char *, const char *, size_t);
 205 }
 206 #endif
 207 #endif  /* __WXMSW__ */
 208
 209 #ifdef __WXPM__
 210 #define strcasecmp stricmp
 211 #define strncasecmp strnicmp
 212 #endif
 213
 214 wxChar *
 215 copystring (const wxChar *s)
 216 {
 217   if (s == NULL) s = wxT("");
 218   size_t len = wxStrlen (s) + 1;
 219
 220   wxChar *news = new wxChar[len];
 221   memcpy (news, s, len * sizeof(wxChar));    // Should be the fastest
 222
 223   return news;
 224 }
 225
 226 // Id generation
 227 static long wxCurrentId = 100;
 228
 229 long
 230 wxNewId (void)
 231 {
 232   return wxCurrentId++;
 233 }
 234
 235 long
 236 wxGetCurrentId(void) { return wxCurrentId; }
 237
 238 void
 239 wxRegisterId (long id)
 240 {
 241   if (id >= wxCurrentId)
 242     wxCurrentId = id + 1;
 243 }
 244
 245 void
 246 StringToFloat (wxChar *s, float *number)
 247 {
 248   if (s && *s && number)
 249     *number = (float) wxStrtod (s, (wxChar **) NULL);
 250 }
 251
 252 void
 253 StringToDouble (wxChar *s, double *number)
 254 {
 255   if (s && *s && number)
 256     *number = wxStrtod (s, (wxChar **) NULL);
 257 }
 258
 259 wxChar *
 260 FloatToString (float number, const wxChar *fmt)
 261 {
 262   static wxChar buf[256];
 263
 264 //  sprintf (buf, "%.2f", number);
 265   wxSprintf (buf, fmt, number);
 266   return buf;
 267 }
 268
 269 wxChar *
 270 DoubleToString (double number, const wxChar *fmt)
 271 {
 272   static wxChar buf[256];
 273
 274   wxSprintf (buf, fmt, number);
 275   return buf;
 276 }
 277
 278 void
 279 StringToInt (wxChar *s, int *number)
 280 {
 281   if (s && *s && number)
 282     *number = (int) wxStrtol (s, (wxChar **) NULL, 10);
 283 }
 284
 285 void
 286 StringToLong (wxChar *s, long *number)
 287 {
 288   if (s && *s && number)
 289     *number = wxStrtol (s, (wxChar **) NULL, 10);
 290 }
 291
 292 wxChar *
 293 IntToString (int number)
 294 {
 295   static wxChar buf[20];
 296
 297   wxSprintf (buf, wxT("%d"), number);
 298   return buf;
 299 }
 300
 301 wxChar *
 302 LongToString (long number)
 303 {
 304   static wxChar buf[20];
 305
 306   wxSprintf (buf, wxT("%ld"), number);
 307   return buf;
 308 }
 309
 310 // Array used in DecToHex conversion routine.
 311 static wxChar hexArray[] = wxT("0123456789ABCDEF");
 312
 313 // Convert 2-digit hex number to decimal
 314 int wxHexToDec(const wxString& buf)
 315 {
 316   int firstDigit, secondDigit;
 317
 318   if (buf.GetChar(0) >= wxT('A'))
 319     firstDigit = buf.GetChar(0) - wxT('A') + 10;
 320   else
 321     firstDigit = buf.GetChar(0) - wxT('0');
 322
 323   if (buf.GetChar(1) >= wxT('A'))
 324     secondDigit = buf.GetChar(1) - wxT('A') + 10;
 325   else
 326     secondDigit = buf.GetChar(1) - wxT('0');
 327
 328   return firstDigit * 16 + secondDigit;
 329 }
 330
 331 // Convert decimal integer to 2-character hex string
 332 void wxDecToHex(int dec, wxChar *buf)
 333 {
 334   int firstDigit = (int)(dec/16.0);
 335   int secondDigit = (int)(dec - (firstDigit*16.0));
 336   buf[0] = hexArray[firstDigit];
 337   buf[1] = hexArray[secondDigit];
 338   buf[2] = 0;
 339 }
 340
 341 // Convert decimal integer to 2-character hex string
 342 wxString wxDecToHex(int dec)
 343 {
 344     wxChar buf[3];
 345     wxDecToHex(dec, buf);
 346     return wxString(buf);
 347 }
 348
 349 // Match a string INDEPENDENT OF CASE
 350 bool
 351 StringMatch (char *str1, char *str2, bool subString, bool exact)
 352 {
 353   if (str1 == NULL || str2 == NULL)
 354     return FALSE;
 355   if (str1 == str2)
 356     return TRUE;
 357
 358   if (subString)
 359     {
 360       int len1 = strlen (str1);
 361       int len2 = strlen (str2);
 362       int i;
 363
 364       // Search for str1 in str2
 365       // Slow .... but acceptable for short strings
 366       for (i = 0; i <= len2 - len1; i++)
 367         {
 368           if (strncasecmp (str1, str2 + i, len1) == 0)
 369             return TRUE;
 370         }
 371     }
 372   else if (exact)
 373     {
 374       if (strcasecmp (str1, str2) == 0)
 375         return TRUE;
 376     }
 377   else
 378     {
 379       int len1 = strlen (str1);
 380       int len2 = strlen (str2);
 381
 382       if (strncasecmp (str1, str2, wxMin (len1, len2)) == 0)
 383         return TRUE;
 384     }
 385
 386   return FALSE;
 387 }
 388
 389 // Return the current date/time
 390 // [volatile]
 391 wxString wxNow()
 392 {
 393   time_t now = time((time_t *) NULL);
 394   char *date = ctime(&now);
 395   date[24] = '\0';
 396   return wxString(date);
 397 }
 398
 399 #if wxUSE_GUI
 400
 401 // ----------------------------------------------------------------------------
 402 // Menu accelerators related functions
 403 // ----------------------------------------------------------------------------
 404
 405 wxChar *wxStripMenuCodes (wxChar *in, wxChar *out)
 406 {
 407   if (!in)
 408     return (wxChar *) NULL;
 409
 410   if (!out)
 411     out = copystring(in);
 412
 413   wxChar *tmpOut = out;
 414
 415   while (*in)
 416     {
 417       if (*in == wxT('&'))
 418         {
 419           // Check && -> &, &x -> x
 420           if (*++in == wxT('&'))
 421             *out++ = *in++;
 422         }
 423       else if (*in == wxT('\t'))
 424         {
 425           // Remove all stuff after \t in X mode, and let the stuff as is
 426           // in Windows mode.
 427           // Accelerators are handled in wx_item.cc for Motif, and are not
 428           // YET supported in XView
 429           break;
 430         }
 431       else
 432         *out++ = *in++;
 433     }                                // while
 434
 435   *out = wxT('\0');
 436
 437   return tmpOut;
 438 }
 439
 440 wxString wxStripMenuCodes(const wxString& str)
 441 {
 442     wxChar *buf = new wxChar[str.Length() + 1];
 443     wxStripMenuCodes(WXSTRINGCAST str, buf);
 444     wxString str1(buf);
 445     delete[] buf;
 446     return str1;
 447 }
 448
 449 #if wxUSE_ACCEL
 450
 451 // return wxAcceleratorEntry for the given menu string or NULL if none
 452 // specified
 453 wxAcceleratorEntry *wxGetAccelFromString(const wxString& label)
 454 {
 455     // check for accelerators: they are given after '\t'
 456     int posTab = label.Find(wxT('\t'));
 457     if ( posTab != wxNOT_FOUND ) {
 458         // parse the accelerator string
 459         int keyCode = 0;
 460         int accelFlags = wxACCEL_NORMAL;
 461         wxString current;
 462         for ( size_t n = (size_t)posTab + 1; n < label.Len(); n++ ) {
 463             if ( (label[n] == '+') || (label[n] == '-') ) {
 464                 if ( current == _("ctrl") )
 465                     accelFlags |= wxACCEL_CTRL;
 466                 else if ( current == _("alt") )
 467                     accelFlags |= wxACCEL_ALT;
 468                 else if ( current == _("shift") )
 469                     accelFlags |= wxACCEL_SHIFT;
 470                 else {
 471                     wxLogDebug(wxT("Unknown accel modifier: '%s'"),
 472                                current.c_str());
 473                 }
 474
 475                 current.Empty();
 476             }
 477             else {
 478                 current += wxTolower(label[n]);
 479             }
 480         }
 481
 482         if ( current.IsEmpty() ) {
 483             wxLogDebug(wxT("No accel key found, accel string ignored."));
 484         }
 485         else {
 486             if ( current.Len() == 1 ) {
 487                 // it's a letter
 488                 keyCode = wxToupper(current[0U]);
 489             }
 490             else {
 491                 // is it a function key?
 492                 if ( current[0U] == 'f' && isdigit(current[1U]) &&
 493                      (current.Len() == 2 ||
 494                      (current.Len() == 3 && isdigit(current[2U]))) ) {
 495                     int n;
 496                     wxSscanf(current.c_str() + 1, wxT("%d"), &n);
 497
 498                     keyCode = WXK_F1 + n - 1;
 499                 }
 500                 else {
 501 #if 0 // this is not supported by GTK+, apparently
 502                     // several special cases
 503                     current.MakeUpper();
 504                     if ( current == wxT("DEL") ) {
 505                         keyCode = VK_DELETE;
 506                     }
 507                     else if ( current == wxT("PGUP") ) {
 508                         keyCode = VK_PRIOR;
 509                     }
 510                     else if ( current == wxT("PGDN") ) {
 511                         keyCode = VK_NEXT;
 512                     }
 513                     else
 514 #endif // 0
 515                     {
 516                         wxLogDebug(wxT("Unrecognized accel key '%s', accel "
 517                                        "string ignored."), current.c_str());
 518                     }
 519                 }
 520             }
 521         }
 522
 523         if ( keyCode ) {
 524             // we do have something
 525             return new wxAcceleratorEntry(accelFlags, keyCode);
 526         }
 527     }
 528
 529     return (wxAcceleratorEntry *)NULL;
 530 }
 531
 532 #endif // wxUSE_ACCEL
 533
 534 // ----------------------------------------------------------------------------
 535 // Window search functions
 536 // ----------------------------------------------------------------------------
 537
 538 /*
 539  * If parent is non-NULL, look through children for a label or title
 540  * matching the specified string. If NULL, look through all top-level windows.
 541  *
 542  */
 543
 544 wxWindow *
 545 wxFindWindowByLabel (const wxString& title, wxWindow * parent)
 546 {
 547     if (parent)
 548     {
 549         return wxFindWindowByLabel1(title, parent);
 550     }
 551     else
 552     {
 553         for ( wxWindowList::Node * node = wxTopLevelWindows.GetFirst();
 554               node;
 555               node = node->GetNext() )
 556         {
 557             wxWindow *win = node->GetData();
 558             wxWindow *retwin = wxFindWindowByLabel1 (title, win);
 559             if (retwin)
 560                 return retwin;
 561         }                        // for()
 562
 563     }
 564     return (wxWindow *) NULL;
 565 }
 566
 567 // Recursive
 568 static wxWindow *
 569 wxFindWindowByLabel1 (const wxString& title, wxWindow * parent)
 570 {
 571     if (parent)
 572     {
 573         if (parent->GetLabel() == title)
 574             return parent;
 575     }
 576
 577     if (parent)
 578     {
 579         for ( wxWindowList::Node * node = parent->GetChildren().GetFirst();
 580               node;
 581               node = node->GetNext() )
 582         {
 583             wxWindow *win = (wxWindow *)node->GetData();
 584             wxWindow *retwin = wxFindWindowByLabel1 (title, win);
 585             if (retwin)
 586                 return retwin;
 587         }
 588
 589     }
 590
 591     return (wxWindow *) NULL;                        // Not found
 592 }
 593
 594 /*
 595  * If parent is non-NULL, look through children for a name
 596  * matching the specified string. If NULL, look through all top-level windows.
 597  *
 598  */
 599
 600 wxWindow *
 601 wxFindWindowByName (const wxString& title, wxWindow * parent)
 602 {
 603     if (parent)
 604     {
 605         return wxFindWindowByName1 (title, parent);
 606     }
 607     else
 608     {
 609         for ( wxWindowList::Node * node = wxTopLevelWindows.GetFirst();
 610               node;
 611               node = node->GetNext() )
 612         {
 613             wxWindow *win = node->GetData();
 614             wxWindow *retwin = wxFindWindowByName1 (title, win);
 615             if (retwin)
 616                 return retwin;
 617         }
 618
 619     }
 620
 621     // Failed? Try by label instead.
 622     return wxFindWindowByLabel(title, parent);
 623 }
 624
 625 // Recursive
 626 static wxWindow *
 627 wxFindWindowByName1 (const wxString& title, wxWindow * parent)
 628 {
 629   if (parent)
 630     {
 631             if ( parent->GetName() == title )
 632                         return parent;
 633     }
 634
 635   if (parent)
 636     {
 637       for (wxNode * node = parent->GetChildren().First (); node; node = node->Next ())
 638         {
 639           wxWindow *win = (wxWindow *) node->Data ();
 640           wxWindow *retwin = wxFindWindowByName1 (title, win);
 641           if (retwin)
 642             return retwin;
 643         }                        // for()
 644
 645     }
 646
 647   return (wxWindow *) NULL;                        // Not found
 648
 649 }
 650
 651 // Returns menu item id or -1 if none.
 652 int
 653 wxFindMenuItemId (wxFrame * frame, const wxString& menuString, const wxString& itemString)
 654 {
 655   wxMenuBar *menuBar = frame->GetMenuBar ();
 656   if (!menuBar)
 657     return -1;
 658   return menuBar->FindMenuItem (menuString, itemString);
 659 }
 660
 661 #endif // wxUSE_GUI
 662
 663 /*
 664 On Fri, 21 Jul 1995, Paul Craven wrote:
 665
 666 > Is there a way to find the path of running program's executable? I can get
 667 > my home directory, and the current directory, but I don't know how to get the
 668 > executable directory.
 669 >
 670
 671 The code below (warty as it is), does what you want on most Unix,
 672 DOS, and Mac platforms (it's from the ALS Prolog main).
 673
 674 || Ken Bowen      Applied Logic Systems, Inc.         PO Box 180,
 675 ||====            Voice:  +1 (617)965-9191            Newton Centre,
 676 ||                FAX:    +1 (617)965-1636            MA  02159  USA
 677                   Email:  ken@als.com        WWW: http://www.als.com
 678 ------------------------------------------------------------------------
 679 */
 680
 681 // This code is commented out but it may be integrated with wxWin at
 682 // a later date, after testing. Thanks Ken!
 683 #if 0
 684
 685 /*--------------------------------------------------------------------*
 686  | whereami is given a filename f in the form:  whereami(argv[0])
 687  | It returns the directory in which the executable file (containing
 688  | this code [main.c] ) may be found.  A dot will be returned to indicate
 689  | the current directory.
 690  *--------------------------------------------------------------------*/
 691
 692 static void
 693 whereami(name)
 694     char *name;
 695 {
 696     register char *cutoff = NULL;        /* stifle -Wall */
 697     register char *s;
 698     register char *t;
 699     int   cc;
 700     char  ebuf[4096];
 701
 702     /*
 703      * See if the file is accessible either through the current directory
 704      * or through an absolute path.
 705      */
 706
 707     if (access(name, R_OK) == 0) {
 708
 709         /*-------------------------------------------------------------*
 710          * The file was accessible without any other work.  But the current
 711          * working directory might change on us, so if it was accessible
 712          * through the cwd, then we should get it for later accesses.
 713          *-------------------------------------------------------------*/
 714
 715         t = imagedir;
 716         if (!absolute_pathname(name)) {
 717 #if defined(DOS) || defined(__WIN32__)
 718             int   drive;
 719             char *newrbuf;
 720
 721             newrbuf = imagedir;
 722 #ifndef __DJGPP__
 723             if (*(name + 1) == ':') {
 724                 if (*name >= 'a' && *name <= 'z')
 725                     drive = (int) (*name - 'a' + 1);
 726                 else
 727                     drive = (int) (*name - 'A' + 1);
 728                 *newrbuf++ = *name;
 729                 *newrbuf++ = *(name + 1);
 730                 *newrbuf++ = DIR_SEPARATOR;
 731             }
 732             else {
 733                 drive = 0;
 734                 *newrbuf++ = DIR_SEPARATOR;
 735             }
 736             if (getcwd(newrbuf, drive) == 0) {        /* } */
 737 #else
 738             if (getcwd(newrbuf, 1024) == 0) {        /* } */
 739 #endif
 740 #else  /* DOS */
 741 #ifdef HAVE_GETWD
 742             if (getwd(imagedir) == 0) {                /* } */
 743 #else  /* !HAVE_GETWD */
 744             if (getcwd(imagedir, 1024) == 0) {
 745 #endif /* !HAVE_GETWD */
 746 #endif /* DOS */
 747                 fatal_error(FE_GETCWD, 0);
 748             }
 749             for (; *t; t++)        /* Set t to end of buffer */
 750                 ;
 751             if (*(t - 1) == DIR_SEPARATOR)        /* leave slash if already
 752                                                  * last char
 753                                                  */
 754                 cutoff = t - 1;
 755             else {
 756                 cutoff = t;        /* otherwise put one in */
 757                 *t++ = DIR_SEPARATOR;
 758             }
 759         }
 760 #if (!defined(__MAC__) && !defined(__DJGPP__) && !defined(__GO32__) && !defined(__WIN32__))
 761         else
 762                 (*t++ = DIR_SEPARATOR);
 763 #endif
 764
 765         /*-------------------------------------------------------------*
 766          * Copy the rest of the string and set the cutoff if it was not
 767          * already set.  If the first character of name is a slash, cutoff
 768          * is not presently set but will be on the first iteration of the
 769          * loop below.
 770          *-------------------------------------------------------------*/
 771
 772         for ((*name == DIR_SEPARATOR ? (s = name+1) : (s = name));;) {
 773             if (*s == DIR_SEPARATOR)
 774                         cutoff = t;
 775             if (!(*t++ = *s++))
 776                         break;
 777         }
 778
 779     }
 780     else {
 781
 782         /*-------------------------------------------------------------*
 783          * Get the path list from the environment.  If the path list is
 784          * inaccessible for any reason, leave with fatal error.
 785          *-------------------------------------------------------------*/
 786
 787 #ifdef __MAC__
 788         if ((s = getenv("Commands")) == (char *) 0)
 789 #else
 790         if ((s = getenv("PATH")) == (char *) 0)
 791 #endif
 792             fatal_error(FE_PATH, 0);
 793
 794         /*
 795          * Copy path list into ebuf and set the source pointer to the
 796          * beginning of this buffer.
 797          */
 798
 799         strcpy(ebuf, s);
 800         s = ebuf;
 801
 802         for (;;) {
 803             t = imagedir;
 804             while (*s && *s != PATH_SEPARATOR)
 805                 *t++ = *s++;
 806             if (t > imagedir && *(t - 1) == DIR_SEPARATOR)
 807                 ;                /* do nothing -- slash already is in place */
 808             else
 809                 *t++ = DIR_SEPARATOR;        /* put in the slash */
 810             cutoff = t - 1;        /* set cutoff */
 811             strcpy(t, name);
 812             if (access(imagedir, R_OK) == 0)
 813                 break;
 814
 815             if (*s)
 816                 s++;                /* advance source pointer */
 817             else
 818                 fatal_error(FE_INFND, 0);
 819         }
 820
 821     }
 822
 823     /*-------------------------------------------------------------*
 824      | At this point the full pathname should exist in imagedir and
 825      | cutoff should be set to the final slash.  We must now determine
 826      | whether the file name is a symbolic link or not and chase it down
 827      | if it is.  Note that we reuse ebuf for getting the link.
 828      *-------------------------------------------------------------*/
 829
 830 #ifdef HAVE_SYMLINK
 831     while ((cc = readlink(imagedir, ebuf, 512)) != -1) {
 832         ebuf[cc] = 0;
 833         s = ebuf;
 834         if (*s == DIR_SEPARATOR) {
 835             t = imagedir;
 836         }
 837         else {
 838             t = cutoff + 1;
 839         }
 840         for (;;) {
 841             if (*s == DIR_SEPARATOR)
 842                 cutoff = t;        /* mark the last slash seen */
 843             if (!(*t++ = *s++))        /* copy the character */
 844                 break;
 845         }
 846     }
 847
 848 #endif /* HAVE_SYMLINK */
 849
 850     strcpy(imagename, cutoff + 1);        /* keep the image name */
 851     *(cutoff + 1) = 0;                /* chop off the filename part */
 852 }
 853
 854 #endif
 855
 856 #if wxUSE_GUI
 857
 858 // ----------------------------------------------------------------------------
 859 // GUI helpers
 860 // ----------------------------------------------------------------------------
 861
 862 /*
 863  * N.B. these convenience functions must be separate from msgdlgg.cpp, textdlgg.cpp
 864  * since otherwise the generic code may be pulled in unnecessarily.
 865  */
 866
 867 int wxMessageBox(const wxString& message, const wxString& caption, long style,
 868                  wxWindow *parent, int WXUNUSED(x), int WXUNUSED(y) )
 869 {
 870     wxMessageDialog dialog(parent, message, caption, style);
 871
 872     int ans = dialog.ShowModal();
 873     switch ( ans )
 874     {
 875         case wxID_OK:
 876             return wxOK;
 877         case wxID_YES:
 878             return wxYES;
 879         case wxID_NO:
 880             return wxNO;
 881         default:
 882         case wxID_CANCEL:
 883             return wxCANCEL;
 884     }
 885 }
 886
 887 #if wxUSE_TEXTDLG
 888 wxString wxGetTextFromUser(const wxString& message, const wxString& caption,
 889                         const wxString& defaultValue, wxWindow *parent,
 890                         int x, int y, bool WXUNUSED(centre) )
 891 {
 892     wxString str;
 893     wxTextEntryDialog dialog(parent, message, caption, defaultValue, wxOK|wxCANCEL, wxPoint(x, y));
 894     if (dialog.ShowModal() == wxID_OK)
 895     {
 896         str = dialog.GetValue();
 897     }
 898
 899     return str;
 900 }
 901
 902 wxString wxGetPasswordFromUser(const wxString& message,
 903                                const wxString& caption,
 904                                const wxString& defaultValue,
 905                                wxWindow *parent)
 906 {
 907     wxString str;
 908     wxTextEntryDialog dialog(parent, message, caption, defaultValue,
 909                              wxOK | wxCANCEL | wxTE_PASSWORD);
 910     if ( dialog.ShowModal() == wxID_OK )
 911     {
 912         str = dialog.GetValue();
 913     }
 914
 915     return str;
 916 }
 917
 918 #endif // wxUSE_TEXTDLG
 919
 920 wxColour wxGetColourFromUser(wxWindow *parent, const wxColour& colInit)
 921 {
 922       wxColourData data;
 923       data.SetChooseFull(TRUE);
 924       if ( colInit.Ok() )
 925       {
 926           data.SetColour((wxColour &)colInit); // const_cast
 927       }
 928
 929       wxColour colRet;
 930       wxColourDialog dialog(parent, &data);
 931       if ( dialog.ShowModal() == wxID_OK )
 932       {
 933           colRet = dialog.GetColourData().GetColour();
 934       }
 935       //else: leave it invalid
 936
 937       return colRet;
 938 }
 939
 940 // ----------------------------------------------------------------------------
 941 // missing C RTL functions (FIXME shouldn't be here at all)
 942 // ----------------------------------------------------------------------------
 943
 944 #ifdef __MWERKS__
 945 char *strdup(const char *s)
 946 {
 947         return strcpy( (char*) malloc( strlen( s ) + 1 ) , s ) ;
 948 }
 949
 950 int isascii( int c )
 951 {
 952         return ( c >= 0 && c < 128 ) ;
 953 }
 954 #endif // __MWERKS__
 955
 956 // ----------------------------------------------------------------------------
 957 // wxSafeYield and supporting functions
 958 // ----------------------------------------------------------------------------
 959
 960 void wxEnableTopLevelWindows(bool enable)
 961 {
 962     wxWindowList::Node *node;
 963     for ( node = wxTopLevelWindows.GetFirst(); node; node = node->GetNext() )
 964         node->GetData()->Enable(enable);
 965 }
 966
 967 wxWindowDisabler::wxWindowDisabler(wxWindow *winToSkip)
 968 {
 969 #ifdef __WXMSW__
 970 #ifdef __WIN32__
 971     // and the top level window too
 972     HWND hwndFG = ::GetForegroundWindow();
 973     m_winTop = hwndFG ? wxFindWinFromHandle((WXHWND)hwndFG) : (wxWindow *)NULL;
 974 #else
 975     HWND hwndFG = ::GetTopWindow(0);
 976     m_winTop = hwndFG ? wxFindWinFromHandle((WXHWND)hwndFG) : (wxWindow *)NULL;
 977 #endif
 978 #endif // MSW
 979
 980     // remember the top level windows which were already disabled, so that we
 981     // don't reenable them later
 982     m_winDisabled = NULL;
 983
 984     wxWindowList::Node *node;
 985     for ( node = wxTopLevelWindows.GetFirst(); node; node = node->GetNext() )
 986     {
 987         wxWindow *winTop = node->GetData();
 988         if ( winTop == winToSkip )
 989             continue;
 990
 991         if ( winTop->IsEnabled() )
 992         {
 993             winTop->Disable();
 994         }
 995         else
 996         {
 997             if ( !m_winDisabled )
 998             {
 999                 m_winDisabled = new wxWindowList;
1000             }
1001
1002             m_winDisabled->Append(winTop);
1003         }
1004     }
1005 }
1006
1007 wxWindowDisabler::~wxWindowDisabler()
1008 {
1009     wxWindowList::Node *node;
1010     for ( node = wxTopLevelWindows.GetFirst(); node; node = node->GetNext() )
1011     {
1012         wxWindow *winTop = node->GetData();
1013         if ( !m_winDisabled || !m_winDisabled->Find(winTop) )
1014         {
1015             winTop->Enable();
1016         }
1017         //else: had been already disabled, don't reenable
1018     }
1019
1020     delete m_winDisabled;
1021
1022 #ifdef __WXMSW__
1023 #ifdef __WIN32__
1024     if ( m_winTop )
1025     {
1026         if ( !::SetForegroundWindow(GetHwndOf(m_winTop)) )
1027         {
1028             wxLogLastError("SetForegroundWindow");
1029         }
1030     }
1031 #else
1032     if ( m_winTop )
1033     {
1034         // 16-bit SetForegroundWindow() replacement
1035         RECT reWin;
1036         GetWindowRect((HWND) m_winTop, &reWin);
1037         SetWindowPos ((HWND) m_winTop, HWND_TOP,
1038                              reWin.left, reWin.top,
1039                              reWin.right - reWin.left, reWin.bottom,
1040                              SWP_SHOWWINDOW);
1041     }
1042 #endif
1043 #endif // MSW
1044 }
1045
1046 // Yield to other apps/messages and disable user input to all windows except
1047 // the given one
1048 bool wxSafeYield(wxWindow *win)
1049 {
1050     wxWindowDisabler wd(win);
1051
1052     bool rc = wxYield();
1053
1054     return rc;
1055 }
1056
1057 // ----------------------------------------------------------------------------
1058 // misc functions
1059 // ----------------------------------------------------------------------------
1060
1061 // Don't synthesize KeyUp events holding down a key and producing KeyDown
1062 // events with autorepeat. On by default and always on in wxMSW. wxGTK version
1063 // in utilsgtk.cpp.
1064 #ifndef __WXGTK__
1065 bool wxSetDetectableAutoRepeat( bool WXUNUSED(flag) )
1066 {
1067     return TRUE;    // detectable auto-repeat is the only mode MSW supports
1068 }
1069 #endif // !wxGTK
1070
1071 #endif // wxUSE_GUI
1072
1073 // ----------------------------------------------------------------------------
1074 // network and user id functions
1075 // ----------------------------------------------------------------------------
1076
1077 // Get Full RFC822 style email address
1078 bool wxGetEmailAddress(wxChar *address, int maxSize)
1079 {
1080     wxString email = wxGetEmailAddress();
1081     if ( !email )
1082         return FALSE;
1083
1084     wxStrncpy(address, email, maxSize - 1);
1085     address[maxSize - 1] = wxT('\0');
1086
1087     return TRUE;
1088 }
1089
1090 wxString wxGetEmailAddress()
1091 {
1092     wxString email;
1093
1094     wxString host = wxGetHostName();
1095     if ( !!host )
1096     {
1097         wxString user = wxGetUserId();
1098         if ( !!user )
1099         {
1100             wxString email(user);
1101             email << wxT('@') << host;
1102         }
1103     }
1104
1105     return email;
1106 }
1107
1108 wxString wxGetUserId()
1109 {
1110     static const int maxLoginLen = 256; // FIXME arbitrary number
1111
1112     wxString buf;
1113     bool ok = wxGetUserId(buf.GetWriteBuf(maxLoginLen), maxLoginLen);
1114     buf.UngetWriteBuf();
1115
1116     if ( !ok )
1117         buf.Empty();
1118
1119     return buf;
1120 }
1121
1122 wxString wxGetUserName()
1123 {
1124     static const int maxUserNameLen = 1024; // FIXME arbitrary number
1125
1126     wxString buf;
1127     bool ok = wxGetUserName(buf.GetWriteBuf(maxUserNameLen), maxUserNameLen);
1128     buf.UngetWriteBuf();
1129
1130     if ( !ok )
1131         buf.Empty();
1132
1133     return buf;
1134 }
1135
1136 wxString wxGetHostName()
1137 {
1138     static const size_t hostnameSize = 257;
1139
1140     wxString buf;
1141     bool ok = wxGetHostName(buf.GetWriteBuf(hostnameSize), hostnameSize);
1142
1143     buf.UngetWriteBuf();
1144
1145     if ( !ok )
1146         buf.Empty();
1147
1148     return buf;
1149 }
1150
1151 wxString wxGetFullHostName()
1152 {
1153     static const size_t hostnameSize = 257;
1154
1155     wxString buf;
1156     bool ok = wxGetFullHostName(buf.GetWriteBuf(hostnameSize), hostnameSize);
1157
1158     buf.UngetWriteBuf();
1159
1160     if ( !ok )
1161         buf.Empty();
1162
1163     return buf;
1164 }
1165
1166 wxString wxGetHomeDir()
1167 {
1168     wxString home;
1169     wxGetHomeDir(&home);
1170
1171     return home;
1172 }
1173
1174 #if 0
1175
1176 wxString wxGetCurrentDir()
1177 {
1178     wxString dir;
1179     size_t len = 1024;
1180     bool ok;
1181     do
1182     {
1183         ok = getcwd(dir.GetWriteBuf(len + 1), len) != NULL;
1184         dir.UngetWriteBuf();
1185
1186         if ( !ok )
1187         {
1188             if ( errno != ERANGE )
1189             {
1190                 wxLogSysError(_T("Failed to get current directory"));
1191
1192                 return wxEmptyString;
1193             }
1194             else
1195             {
1196                 // buffer was too small, retry with a larger one
1197                 len *= 2;
1198             }
1199         }
1200         //else: ok
1201     } while ( !ok );
1202
1203     return dir;
1204 }
1205
1206 #endif // 0
1207
1208 // ----------------------------------------------------------------------------
1209 // wxExecute
1210 // ----------------------------------------------------------------------------
1211
1212 long wxExecute(const wxString& command, wxArrayString& output)
1213 {
1214 #ifdef __WIN16__
1215     wxFAIL_MSG("Sorry, this version of wxExecute not implemented on WIN16.");
1216     return 0;
1217 #else
1218     // create a wxProcess which will capture the output
1219     wxProcess *process = new wxProcess;
1220     process->Redirect();
1221
1222     long rc = wxExecute(command, TRUE /* sync */, process);
1223     if ( rc != -1 )
1224     {
1225         wxInputStream& is = *process->GetInputStream();
1226         wxTextInputStream tis(is);
1227         while ( !is.Eof() && is.IsOk() )
1228         {
1229             wxString line = tis.ReadLine();
1230             if ( is.LastError() )
1231                 break;
1232
1233             output.Add(line);
1234         }
1235     }
1236
1237     return rc;
1238 #endif
1239 }