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