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                     // several special cases
 502                     current.MakeUpper();
 503                     if ( current == wxT("DEL") ) {
 504                         keyCode = WXK_DELETE;
 505                     }
 506                     else if ( current == wxT("DELETE") ) {
 507                         keyCode = WXK_DELETE;
 508                     }
 509                     else if ( current == wxT("INS") ) {
 510                         keyCode = WXK_INSERT;
 511                     }
 512                     else if ( current == wxT("INSERT") ) {
 513                         keyCode = WXK_INSERT;
 514                     }
 515 #if 0
 516                     else if ( current == wxT("PGUP") ) {
 517                         keyCode = VK_PRIOR;
 518                     }
 519                     else if ( current == wxT("PGDN") ) {
 520                         keyCode = VK_NEXT;
 521                     }
 522 #endif
 523                     else
 524                     {
 525                         wxLogDebug(wxT("Unrecognized accel key '%s', accel string ignored."),
 526                                    current.c_str());
 527                     }
 528                 }
 529             }
 530         }
 531
 532         if ( keyCode ) {
 533             // we do have something
 534             return new wxAcceleratorEntry(accelFlags, keyCode);
 535         }
 536     }
 537
 538     return (wxAcceleratorEntry *)NULL;
 539 }
 540
 541 #endif // wxUSE_ACCEL
 542
 543 // ----------------------------------------------------------------------------
 544 // Window search functions
 545 // ----------------------------------------------------------------------------
 546
 547 /*
 548  * If parent is non-NULL, look through children for a label or title
 549  * matching the specified string. If NULL, look through all top-level windows.
 550  *
 551  */
 552
 553 wxWindow *
 554 wxFindWindowByLabel (const wxString& title, wxWindow * parent)
 555 {
 556     if (parent)
 557     {
 558         return wxFindWindowByLabel1(title, parent);
 559     }
 560     else
 561     {
 562         for ( wxWindowList::Node * node = wxTopLevelWindows.GetFirst();
 563               node;
 564               node = node->GetNext() )
 565         {
 566             wxWindow *win = node->GetData();
 567             wxWindow *retwin = wxFindWindowByLabel1 (title, win);
 568             if (retwin)
 569                 return retwin;
 570         }                        // for()
 571
 572     }
 573     return (wxWindow *) NULL;
 574 }
 575
 576 // Recursive
 577 static wxWindow *
 578 wxFindWindowByLabel1 (const wxString& title, wxWindow * parent)
 579 {
 580     if (parent)
 581     {
 582         if (parent->GetLabel() == title)
 583             return parent;
 584     }
 585
 586     if (parent)
 587     {
 588         for ( wxWindowList::Node * node = parent->GetChildren().GetFirst();
 589               node;
 590               node = node->GetNext() )
 591         {
 592             wxWindow *win = (wxWindow *)node->GetData();
 593             wxWindow *retwin = wxFindWindowByLabel1 (title, win);
 594             if (retwin)
 595                 return retwin;
 596         }
 597
 598     }
 599
 600     return (wxWindow *) NULL;                        // Not found
 601 }
 602
 603 /*
 604  * If parent is non-NULL, look through children for a name
 605  * matching the specified string. If NULL, look through all top-level windows.
 606  *
 607  */
 608
 609 wxWindow *
 610 wxFindWindowByName (const wxString& title, wxWindow * parent)
 611 {
 612     if (parent)
 613     {
 614         return wxFindWindowByName1 (title, parent);
 615     }
 616     else
 617     {
 618         for ( wxWindowList::Node * node = wxTopLevelWindows.GetFirst();
 619               node;
 620               node = node->GetNext() )
 621         {
 622             wxWindow *win = node->GetData();
 623             wxWindow *retwin = wxFindWindowByName1 (title, win);
 624             if (retwin)
 625                 return retwin;
 626         }
 627
 628     }
 629
 630     // Failed? Try by label instead.
 631     return wxFindWindowByLabel(title, parent);
 632 }
 633
 634 // Recursive
 635 static wxWindow *
 636 wxFindWindowByName1 (const wxString& title, wxWindow * parent)
 637 {
 638   if (parent)
 639     {
 640             if ( parent->GetName() == title )
 641                         return parent;
 642     }
 643
 644   if (parent)
 645     {
 646       for (wxNode * node = parent->GetChildren().First (); node; node = node->Next ())
 647         {
 648           wxWindow *win = (wxWindow *) node->Data ();
 649           wxWindow *retwin = wxFindWindowByName1 (title, win);
 650           if (retwin)
 651             return retwin;
 652         }                        // for()
 653
 654     }
 655
 656   return (wxWindow *) NULL;                        // Not found
 657
 658 }
 659
 660 // Returns menu item id or -1 if none.
 661 int
 662 wxFindMenuItemId (wxFrame * frame, const wxString& menuString, const wxString& itemString)
 663 {
 664   wxMenuBar *menuBar = frame->GetMenuBar ();
 665   if (!menuBar)
 666     return -1;
 667   return menuBar->FindMenuItem (menuString, itemString);
 668 }
 669
 670 #endif // wxUSE_GUI
 671
 672 /*
 673 On Fri, 21 Jul 1995, Paul Craven wrote:
 674
 675 > Is there a way to find the path of running program's executable? I can get
 676 > my home directory, and the current directory, but I don't know how to get the
 677 > executable directory.
 678 >
 679
 680 The code below (warty as it is), does what you want on most Unix,
 681 DOS, and Mac platforms (it's from the ALS Prolog main).
 682
 683 || Ken Bowen      Applied Logic Systems, Inc.         PO Box 180,
 684 ||====            Voice:  +1 (617)965-9191            Newton Centre,
 685 ||                FAX:    +1 (617)965-1636            MA  02159  USA
 686                   Email:  ken@als.com        WWW: http://www.als.com
 687 ------------------------------------------------------------------------
 688 */
 689
 690 // This code is commented out but it may be integrated with wxWin at
 691 // a later date, after testing. Thanks Ken!
 692 #if 0
 693
 694 /*--------------------------------------------------------------------*
 695  | whereami is given a filename f in the form:  whereami(argv[0])
 696  | It returns the directory in which the executable file (containing
 697  | this code [main.c] ) may be found.  A dot will be returned to indicate
 698  | the current directory.
 699  *--------------------------------------------------------------------*/
 700
 701 static void
 702 whereami(name)
 703     char *name;
 704 {
 705     register char *cutoff = NULL;        /* stifle -Wall */
 706     register char *s;
 707     register char *t;
 708     int   cc;
 709     char  ebuf[4096];
 710
 711     /*
 712      * See if the file is accessible either through the current directory
 713      * or through an absolute path.
 714      */
 715
 716     if (access(name, R_OK) == 0) {
 717
 718         /*-------------------------------------------------------------*
 719          * The file was accessible without any other work.  But the current
 720          * working directory might change on us, so if it was accessible
 721          * through the cwd, then we should get it for later accesses.
 722          *-------------------------------------------------------------*/
 723
 724         t = imagedir;
 725         if (!absolute_pathname(name)) {
 726 #if defined(DOS) || defined(__WIN32__)
 727             int   drive;
 728             char *newrbuf;
 729
 730             newrbuf = imagedir;
 731 #ifndef __DJGPP__
 732             if (*(name + 1) == ':') {
 733                 if (*name >= 'a' && *name <= 'z')
 734                     drive = (int) (*name - 'a' + 1);
 735                 else
 736                     drive = (int) (*name - 'A' + 1);
 737                 *newrbuf++ = *name;
 738                 *newrbuf++ = *(name + 1);
 739                 *newrbuf++ = DIR_SEPARATOR;
 740             }
 741             else {
 742                 drive = 0;
 743                 *newrbuf++ = DIR_SEPARATOR;
 744             }
 745             if (getcwd(newrbuf, drive) == 0) {        /* } */
 746 #else
 747             if (getcwd(newrbuf, 1024) == 0) {        /* } */
 748 #endif
 749 #else  /* DOS */
 750 #ifdef HAVE_GETWD
 751             if (getwd(imagedir) == 0) {                /* } */
 752 #else  /* !HAVE_GETWD */
 753             if (getcwd(imagedir, 1024) == 0) {
 754 #endif /* !HAVE_GETWD */
 755 #endif /* DOS */
 756                 fatal_error(FE_GETCWD, 0);
 757             }
 758             for (; *t; t++)        /* Set t to end of buffer */
 759                 ;
 760             if (*(t - 1) == DIR_SEPARATOR)        /* leave slash if already
 761                                                  * last char
 762                                                  */
 763                 cutoff = t - 1;
 764             else {
 765                 cutoff = t;        /* otherwise put one in */
 766                 *t++ = DIR_SEPARATOR;
 767             }
 768         }
 769 #if (!defined(__MAC__) && !defined(__DJGPP__) && !defined(__GO32__) && !defined(__WIN32__))
 770         else
 771                 (*t++ = DIR_SEPARATOR);
 772 #endif
 773
 774         /*-------------------------------------------------------------*
 775          * Copy the rest of the string and set the cutoff if it was not
 776          * already set.  If the first character of name is a slash, cutoff
 777          * is not presently set but will be on the first iteration of the
 778          * loop below.
 779          *-------------------------------------------------------------*/
 780
 781         for ((*name == DIR_SEPARATOR ? (s = name+1) : (s = name));;) {
 782             if (*s == DIR_SEPARATOR)
 783                         cutoff = t;
 784             if (!(*t++ = *s++))
 785                         break;
 786         }
 787
 788     }
 789     else {
 790
 791         /*-------------------------------------------------------------*
 792          * Get the path list from the environment.  If the path list is
 793          * inaccessible for any reason, leave with fatal error.
 794          *-------------------------------------------------------------*/
 795
 796 #ifdef __MAC__
 797         if ((s = getenv("Commands")) == (char *) 0)
 798 #else
 799         if ((s = getenv("PATH")) == (char *) 0)
 800 #endif
 801             fatal_error(FE_PATH, 0);
 802
 803         /*
 804          * Copy path list into ebuf and set the source pointer to the
 805          * beginning of this buffer.
 806          */
 807
 808         strcpy(ebuf, s);
 809         s = ebuf;
 810
 811         for (;;) {
 812             t = imagedir;
 813             while (*s && *s != PATH_SEPARATOR)
 814                 *t++ = *s++;
 815             if (t > imagedir && *(t - 1) == DIR_SEPARATOR)
 816                 ;                /* do nothing -- slash already is in place */
 817             else
 818                 *t++ = DIR_SEPARATOR;        /* put in the slash */
 819             cutoff = t - 1;        /* set cutoff */
 820             strcpy(t, name);
 821             if (access(imagedir, R_OK) == 0)
 822                 break;
 823
 824             if (*s)
 825                 s++;                /* advance source pointer */
 826             else
 827                 fatal_error(FE_INFND, 0);
 828         }
 829
 830     }
 831
 832     /*-------------------------------------------------------------*
 833      | At this point the full pathname should exist in imagedir and
 834      | cutoff should be set to the final slash.  We must now determine
 835      | whether the file name is a symbolic link or not and chase it down
 836      | if it is.  Note that we reuse ebuf for getting the link.
 837      *-------------------------------------------------------------*/
 838
 839 #ifdef HAVE_SYMLINK
 840     while ((cc = readlink(imagedir, ebuf, 512)) != -1) {
 841         ebuf[cc] = 0;
 842         s = ebuf;
 843         if (*s == DIR_SEPARATOR) {
 844             t = imagedir;
 845         }
 846         else {
 847             t = cutoff + 1;
 848         }
 849         for (;;) {
 850             if (*s == DIR_SEPARATOR)
 851                 cutoff = t;        /* mark the last slash seen */
 852             if (!(*t++ = *s++))        /* copy the character */
 853                 break;
 854         }
 855     }
 856
 857 #endif /* HAVE_SYMLINK */
 858
 859     strcpy(imagename, cutoff + 1);        /* keep the image name */
 860     *(cutoff + 1) = 0;                /* chop off the filename part */
 861 }
 862
 863 #endif
 864
 865 #if wxUSE_GUI
 866
 867 // ----------------------------------------------------------------------------
 868 // GUI helpers
 869 // ----------------------------------------------------------------------------
 870
 871 /*
 872  * N.B. these convenience functions must be separate from msgdlgg.cpp, textdlgg.cpp
 873  * since otherwise the generic code may be pulled in unnecessarily.
 874  */
 875
 876 int wxMessageBox(const wxString& message, const wxString& caption, long style,
 877                  wxWindow *parent, int WXUNUSED(x), int WXUNUSED(y) )
 878 {
 879     wxMessageDialog dialog(parent, message, caption, style);
 880
 881     int ans = dialog.ShowModal();
 882     switch ( ans )
 883     {
 884         case wxID_OK:
 885             return wxOK;
 886         case wxID_YES:
 887             return wxYES;
 888         case wxID_NO:
 889             return wxNO;
 890         case wxID_CANCEL:
 891             return wxCANCEL;
 892     }
 893
 894     wxFAIL_MSG( _T("unexpected return code from wxMessageDialog") );
 895
 896     return wxCANCEL;
 897 }
 898
 899 #if wxUSE_TEXTDLG
 900 wxString wxGetTextFromUser(const wxString& message, const wxString& caption,
 901                         const wxString& defaultValue, wxWindow *parent,
 902                         int x, int y, bool WXUNUSED(centre) )
 903 {
 904     wxString str;
 905     wxTextEntryDialog dialog(parent, message, caption, defaultValue, wxOK|wxCANCEL, wxPoint(x, y));
 906     if (dialog.ShowModal() == wxID_OK)
 907     {
 908         str = dialog.GetValue();
 909     }
 910
 911     return str;
 912 }
 913
 914 wxString wxGetPasswordFromUser(const wxString& message,
 915                                const wxString& caption,
 916                                const wxString& defaultValue,
 917                                wxWindow *parent)
 918 {
 919     wxString str;
 920     wxTextEntryDialog dialog(parent, message, caption, defaultValue,
 921                              wxOK | wxCANCEL | wxTE_PASSWORD);
 922     if ( dialog.ShowModal() == wxID_OK )
 923     {
 924         str = dialog.GetValue();
 925     }
 926
 927     return str;
 928 }
 929
 930 #endif // wxUSE_TEXTDLG
 931
 932 wxColour wxGetColourFromUser(wxWindow *parent, const wxColour& colInit)
 933 {
 934       wxColourData data;
 935       data.SetChooseFull(TRUE);
 936       if ( colInit.Ok() )
 937       {
 938           data.SetColour((wxColour &)colInit); // const_cast
 939       }
 940
 941       wxColour colRet;
 942       wxColourDialog dialog(parent, &data);
 943       if ( dialog.ShowModal() == wxID_OK )
 944       {
 945           colRet = dialog.GetColourData().GetColour();
 946       }
 947       //else: leave it invalid
 948
 949       return colRet;
 950 }
 951
 952 // ----------------------------------------------------------------------------
 953 // missing C RTL functions (FIXME shouldn't be here at all)
 954 // ----------------------------------------------------------------------------
 955
 956 #ifdef __MWERKS__
 957 char *strdup(const char *s)
 958 {
 959         return strcpy( (char*) malloc( strlen( s ) + 1 ) , s ) ;
 960 }
 961
 962 int isascii( int c )
 963 {
 964         return ( c >= 0 && c < 128 ) ;
 965 }
 966 #endif // __MWERKS__
 967
 968 // ----------------------------------------------------------------------------
 969 // wxSafeYield and supporting functions
 970 // ----------------------------------------------------------------------------
 971
 972 void wxEnableTopLevelWindows(bool enable)
 973 {
 974     wxWindowList::Node *node;
 975     for ( node = wxTopLevelWindows.GetFirst(); node; node = node->GetNext() )
 976         node->GetData()->Enable(enable);
 977 }
 978
 979 wxWindowDisabler::wxWindowDisabler(wxWindow *winToSkip)
 980 {
 981 #ifdef __WXMSW__
 982 #ifdef __WIN32__
 983     // and the top level window too
 984     HWND hwndFG = ::GetForegroundWindow();
 985     m_winTop = hwndFG ? wxFindWinFromHandle((WXHWND)hwndFG) : (wxWindow *)NULL;
 986 #else
 987     HWND hwndFG = ::GetTopWindow(0);
 988     m_winTop = hwndFG ? wxFindWinFromHandle((WXHWND)hwndFG) : (wxWindow *)NULL;
 989 #endif
 990 #endif // MSW
 991
 992     // remember the top level windows which were already disabled, so that we
 993     // don't reenable them later
 994     m_winDisabled = NULL;
 995
 996     wxWindowList::Node *node;
 997     for ( node = wxTopLevelWindows.GetFirst(); node; node = node->GetNext() )
 998     {
 999         wxWindow *winTop = node->GetData();
1000         if ( winTop == winToSkip )
1001             continue;
1002
1003         if ( winTop->IsEnabled() )
1004         {
1005             winTop->Disable();
1006         }
1007         else
1008         {
1009             if ( !m_winDisabled )
1010             {
1011                 m_winDisabled = new wxWindowList;
1012             }
1013
1014             m_winDisabled->Append(winTop);
1015         }
1016     }
1017 }
1018
1019 wxWindowDisabler::~wxWindowDisabler()
1020 {
1021     wxWindowList::Node *node;
1022     for ( node = wxTopLevelWindows.GetFirst(); node; node = node->GetNext() )
1023     {
1024         wxWindow *winTop = node->GetData();
1025         if ( !m_winDisabled || !m_winDisabled->Find(winTop) )
1026         {
1027             winTop->Enable();
1028         }
1029         //else: had been already disabled, don't reenable
1030     }
1031
1032     delete m_winDisabled;
1033
1034 #ifdef __WXMSW__
1035 #ifdef __WIN32__
1036     if ( m_winTop )
1037     {
1038         if ( !::SetForegroundWindow(GetHwndOf(m_winTop)) )
1039         {
1040             wxLogLastError(wxT("SetForegroundWindow"));
1041         }
1042     }
1043 #else
1044     if ( m_winTop )
1045     {
1046         // 16-bit SetForegroundWindow() replacement
1047         RECT reWin;
1048         GetWindowRect((HWND) m_winTop, &reWin);
1049         SetWindowPos ((HWND) m_winTop, HWND_TOP,
1050                              reWin.left, reWin.top,
1051                              reWin.right - reWin.left, reWin.bottom,
1052                              SWP_SHOWWINDOW);
1053     }
1054 #endif
1055 #endif // MSW
1056 }
1057
1058 // Yield to other apps/messages and disable user input to all windows except
1059 // the given one
1060 bool wxSafeYield(wxWindow *win)
1061 {
1062     wxWindowDisabler wd(win);
1063
1064     bool rc = wxYield();
1065
1066     return rc;
1067 }
1068
1069 // ----------------------------------------------------------------------------
1070 // misc functions
1071 // ----------------------------------------------------------------------------
1072
1073 // Don't synthesize KeyUp events holding down a key and producing KeyDown
1074 // events with autorepeat. On by default and always on in wxMSW. wxGTK version
1075 // in utilsgtk.cpp.
1076 #ifndef __WXGTK__
1077 bool wxSetDetectableAutoRepeat( bool WXUNUSED(flag) )
1078 {
1079     return TRUE;    // detectable auto-repeat is the only mode MSW supports
1080 }
1081 #endif // !wxGTK
1082
1083 #endif // wxUSE_GUI
1084
1085 // ----------------------------------------------------------------------------
1086 // network and user id functions
1087 // ----------------------------------------------------------------------------
1088
1089 // Get Full RFC822 style email address
1090 bool wxGetEmailAddress(wxChar *address, int maxSize)
1091 {
1092     wxString email = wxGetEmailAddress();
1093     if ( !email )
1094         return FALSE;
1095
1096     wxStrncpy(address, email, maxSize - 1);
1097     address[maxSize - 1] = wxT('\0');
1098
1099     return TRUE;
1100 }
1101
1102 wxString wxGetEmailAddress()
1103 {
1104     wxString email;
1105
1106     wxString host = wxGetFullHostName();
1107     if ( !!host )
1108     {
1109         wxString user = wxGetUserId();
1110         if ( !!user )
1111         {
1112             email << user << wxT('@') << host;
1113         }
1114     }
1115
1116     return email;
1117 }
1118
1119 wxString wxGetUserId()
1120 {
1121     static const int maxLoginLen = 256; // FIXME arbitrary number
1122
1123     wxString buf;
1124     bool ok = wxGetUserId(buf.GetWriteBuf(maxLoginLen), maxLoginLen);
1125     buf.UngetWriteBuf();
1126
1127     if ( !ok )
1128         buf.Empty();
1129
1130     return buf;
1131 }
1132
1133 wxString wxGetUserName()
1134 {
1135     static const int maxUserNameLen = 1024; // FIXME arbitrary number
1136
1137     wxString buf;
1138     bool ok = wxGetUserName(buf.GetWriteBuf(maxUserNameLen), maxUserNameLen);
1139     buf.UngetWriteBuf();
1140
1141     if ( !ok )
1142         buf.Empty();
1143
1144     return buf;
1145 }
1146
1147 wxString wxGetHostName()
1148 {
1149     static const size_t hostnameSize = 257;
1150
1151     wxString buf;
1152     bool ok = wxGetHostName(buf.GetWriteBuf(hostnameSize), hostnameSize);
1153
1154     buf.UngetWriteBuf();
1155
1156     if ( !ok )
1157         buf.Empty();
1158
1159     return buf;
1160 }
1161
1162 wxString wxGetFullHostName()
1163 {
1164     static const size_t hostnameSize = 257;
1165
1166     wxString buf;
1167     bool ok = wxGetFullHostName(buf.GetWriteBuf(hostnameSize), hostnameSize);
1168
1169     buf.UngetWriteBuf();
1170
1171     if ( !ok )
1172         buf.Empty();
1173
1174     return buf;
1175 }
1176
1177 wxString wxGetHomeDir()
1178 {
1179     wxString home;
1180     wxGetHomeDir(&home);
1181
1182     return home;
1183 }
1184
1185 #if 0
1186
1187 wxString wxGetCurrentDir()
1188 {
1189     wxString dir;
1190     size_t len = 1024;
1191     bool ok;
1192     do
1193     {
1194         ok = getcwd(dir.GetWriteBuf(len + 1), len) != NULL;
1195         dir.UngetWriteBuf();
1196
1197         if ( !ok )
1198         {
1199             if ( errno != ERANGE )
1200             {
1201                 wxLogSysError(_T("Failed to get current directory"));
1202
1203                 return wxEmptyString;
1204             }
1205             else
1206             {
1207                 // buffer was too small, retry with a larger one
1208                 len *= 2;
1209             }
1210         }
1211         //else: ok
1212     } while ( !ok );
1213
1214     return dir;
1215 }
1216
1217 #endif // 0
1218
1219 // ----------------------------------------------------------------------------
1220 // wxExecute
1221 // ----------------------------------------------------------------------------
1222
1223 // this is a private function because it hasn't a clean interface: the first
1224 // array is passed by reference, the second by pointer - instead we have 2
1225 // public versions of wxExecute() below
1226 static long wxDoExecuteWithCapture(const wxString& command,
1227                                    wxArrayString& output,
1228                                    wxArrayString* error)
1229 {
1230 #ifdef __WIN16__
1231     wxFAIL_MSG("Sorry, this version of wxExecute not implemented on WIN16.");
1232
1233     return 0;
1234 #else // !Win16
1235     // create a wxProcess which will capture the output
1236     wxProcess *process = new wxProcess;
1237     process->Redirect();
1238
1239     long rc = wxExecute(command, TRUE /* sync */, process);
1240
1241 #if wxUSE_STREAMS
1242     if ( rc != -1 )
1243     {
1244         wxInputStream* is = process->GetInputStream();
1245         wxCHECK_MSG( is, -1, _T("if wxExecute() succeded, stream can't be NULL") );
1246         wxTextInputStream tis(*is);
1247
1248         wxTextInputStream *tes = NULL;
1249         wxInputStream *es = NULL;
1250         if ( error )
1251         {
1252             es = process->GetErrorStream();
1253
1254             wxCHECK_MSG( es, -1, _T("stderr can't be NULL") );
1255
1256             tes = new wxTextInputStream(*es);
1257         }
1258
1259         bool cont;
1260         do
1261         {
1262             cont = FALSE;
1263
1264             if ( !is->Eof() && is->IsOk() )
1265             {
1266                 wxString line = tis.ReadLine();
1267                 if ( is->LastError() )
1268                     break;
1269
1270                 cont = TRUE;
1271
1272                 output.Add(line);
1273             }
1274
1275             if ( error && !es->Eof() && es->IsOk() )
1276             {
1277                 wxString line = tes->ReadLine();
1278                 if ( es->LastError() )
1279                     break;
1280
1281                 cont = TRUE;
1282
1283                 error->Add(line);
1284             }
1285         }
1286         while ( cont );
1287
1288         delete tes;
1289     }
1290 #endif // wxUSE_STREAMS
1291
1292     delete process;
1293
1294     return rc;
1295 #endif // IO redirection supoprted
1296 }
1297
1298 long wxExecute(const wxString& command, wxArrayString& output)
1299 {
1300     return wxDoExecuteWithCapture(command, output, NULL);
1301 }
1302
1303 long wxExecute(const wxString& command,
1304                wxArrayString& output,
1305                wxArrayString& error)
1306 {
1307     return wxDoExecuteWithCapture(command, output, &error);
1308 }