src/common/utilscmn.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        utilscmn.cpp
   3 // Purpose:     Miscellaneous utility functions and classes
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     29/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1998 Julian Smart
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 #pragma implementation "utils.h"
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #ifdef __BORLANDC__
  20 #pragma hdrstop
  21 #endif
  22
  23 #ifndef WX_PRECOMP
  24 #include "wx/defs.h"
  25 #include "wx/utils.h"
  26 #include "wx/window.h"
  27 #include "wx/menu.h"
  28 #include "wx/frame.h"
  29 #include "wx/msgdlg.h"
  30 #include "wx/textdlg.h"
  31 #endif
  32
  33 #if wxUSE_IOSTREAMH
  34 #include <iostream.h>
  35 #include <fstream.h>
  36 #else
  37 #include <iostream>
  38 #include <fstream>
  39 #  ifdef _MSC_VER
  40       using namespace std;
  41 #  endif
  42 #endif
  43
  44 #include <ctype.h>
  45 #include <stdio.h>
  46 #include <stdlib.h>
  47 #include <string.h>
  48 #if !defined(__WATCOMC__)
  49 #if !(defined(_MSC_VER) && (_MSC_VER > 800))
  50 #include <errno.h>
  51 #endif
  52 #endif
  53 #include <time.h>
  54 #ifndef __MWERKS__
  55 #include <sys/types.h>
  56 #include <sys/stat.h>
  57 #endif
  58
  59 #ifdef __SALFORDC__
  60 #include <clib.h>
  61 #endif
  62
  63 // Pattern matching code.
  64 // Yes, this path is deliberate (for Borland compilation)
  65 #ifdef wx_mac /* MATTHEW: [5] Mac doesn't like paths with "/" */
  66 #include "glob.inc"
  67 #else
  68 #include "../common/glob.inc"
  69 #endif
  70
  71 #ifdef __WXMSW__
  72 #include "windows.h"
  73 #endif
  74
  75 #define _MAXPATHLEN 500
  76
  77 extern char *wxBuffer;
  78
  79 #ifdef __WXMAC__
  80 int strcasecmp(const char *str_1, const char *str_2)
  81 {
  82   register char c1, c2;
  83   do {
  84     c1 = tolower(*str_1++);
  85     c2 = tolower(*str_2++);
  86   } while ( c1 && (c1 == c2) );
  87
  88   return c1 - c2;
  89 }
  90
  91 int strncasecmp(const char *str_1, const char *str_2, size_t maxchar)
  92 {
  93
  94   register char c1, c2;
  95   while( maxchar--)
  96   {
  97     c1 = tolower(*str_1++);
  98     c2 = tolower(*str_2++);
  99
 100     if ( !c1 || c1!=c2 )
 101                 return c1 - c2;
 102
 103   } ;
 104
 105   return 0 ;
 106
 107 }
 108 #endif
 109 #ifdef __VMS__
 110 // we have no strI functions under VMS, therefore I have implemented
 111 // an inefficient but portable version: convert copies of strings to lowercase
 112 // and then use the normal comparison
 113 static void myLowerString(char *s)
 114 {
 115   while(*s){
 116     if(isalpha(*s)) *s = (char)tolower(*s);
 117     s++;
 118   }
 119 }
 120
 121 int strcasecmp(const char *str_1, const char *str_2)
 122 {
 123   char *temp1 = new char[strlen(str_1)+1];
 124   char *temp2 = new char[strlen(str_2)+1];
 125   strcpy(temp1,str_1);
 126   strcpy(temp2,str_2);
 127   myLowerString(temp1);
 128   myLowerString(temp2);
 129
 130   int result = strcmp(temp1,temp2);
 131   delete[] temp1;
 132   delete[] temp2;
 133
 134   return(result);
 135 }
 136
 137 int strncasecmp(const char *str_1, const char *str_2, size_t maxchar)
 138 {
 139   char *temp1 = new char[strlen(str_1)+1];
 140   char *temp2 = new char[strlen(str_2)+1];
 141   strcpy(temp1,str_1);
 142   strcpy(temp2,str_2);
 143   myLowerString(temp1);
 144   myLowerString(temp2);
 145
 146   int result = strncmp(temp1,temp2,maxchar);
 147   delete[] temp1;
 148   delete[] temp2;
 149
 150   return(result);
 151 }
 152 #endif
 153
 154 #ifdef __WINDOWS__
 155
 156 #ifndef __GNUWIN32__
 157 #ifndef __MWERKS__
 158 #define strcasecmp stricmp
 159 #define strncasecmp strnicmp
 160 #else
 161 #define strcasecmp _stricmp
 162 #define strncasecmp _strnicmp
 163 #endif
 164 #endif
 165
 166 #ifdef _MSC_VER
 167 #pragma warning (disable : 4245)
 168 #endif
 169
 170 #ifdef _MSC_VER
 171 #pragma warning (default : 4245)
 172 #endif
 173
 174 #else
 175 // This declaration is missing in SunOS!
 176 // (Yes, I know it is NOT ANSI-C but its in BSD libc)
 177 #if defined(__xlC) || defined(__AIX__) || defined(__GNUG__)
 178 extern "C"
 179 {
 180   int strcasecmp (const char *, const char *);
 181   int strncasecmp (const char *, const char *, size_t);
 182 }
 183 #endif
 184 #endif                          /* __WXMSW__ */
 185
 186
 187 char *
 188 copystring (const char *s)
 189 {
 190   if (s == NULL) s = "";
 191   size_t len = strlen (s) + 1;
 192
 193   char *news = new char[len];
 194   memcpy (news, s, len);        // Should be the fastest
 195
 196   return news;
 197 }
 198
 199 // Id generation
 200 static long wxCurrentId = 100;
 201
 202 long
 203 wxNewId (void)
 204 {
 205   return wxCurrentId++;
 206 }
 207
 208 long
 209 wxGetCurrentId(void) { return wxCurrentId; }
 210
 211 void
 212 wxRegisterId (long id)
 213 {
 214   if (id >= wxCurrentId)
 215     wxCurrentId = id + 1;
 216 }
 217
 218 void
 219 StringToFloat (char *s, float *number)
 220 {
 221   if (s && *s && number)
 222     *number = (float) strtod (s, (char **) NULL);
 223 }
 224
 225 void
 226 StringToDouble (char *s, double *number)
 227 {
 228   if (s && *s && number)
 229     *number = strtod (s, (char **) NULL);
 230 }
 231
 232 char *
 233 FloatToString (float number, const char *fmt)
 234 {
 235   static char buf[256];
 236
 237 //  sprintf (buf, "%.2f", number);
 238   sprintf (buf, fmt, number);
 239   return buf;
 240 }
 241
 242 char *
 243 DoubleToString (double number, const char *fmt)
 244 {
 245   static char buf[256];
 246
 247   sprintf (buf, fmt, number);
 248   return buf;
 249 }
 250
 251 void
 252 StringToInt (char *s, int *number)
 253 {
 254   if (s && *s && number)
 255     *number = (int) strtol (s, (char **) NULL, 10);
 256 }
 257
 258 void
 259 StringToLong (char *s, long *number)
 260 {
 261   if (s && *s && number)
 262     *number = strtol (s, (char **) NULL, 10);
 263 }
 264
 265 char *
 266 IntToString (int number)
 267 {
 268   static char buf[20];
 269
 270   sprintf (buf, "%d", number);
 271   return buf;
 272 }
 273
 274 char *
 275 LongToString (long number)
 276 {
 277   static char buf[20];
 278
 279   sprintf (buf, "%ld", number);
 280   return buf;
 281 }
 282
 283 // Array used in DecToHex conversion routine.
 284 static char hexArray[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B',
 285   'C', 'D', 'E', 'F' };
 286
 287 // Convert 2-digit hex number to decimal
 288 int wxHexToDec(const wxString& buf)
 289 {
 290   int firstDigit, secondDigit;
 291
 292   if (buf.GetChar(0) >= 'A')
 293     firstDigit = buf.GetChar(0) - 'A' + 10;
 294   else
 295     firstDigit = buf.GetChar(0) - '0';
 296
 297   if (buf.GetChar(1) >= 'A')
 298     secondDigit = buf.GetChar(1) - 'A' + 10;
 299   else
 300     secondDigit = buf.GetChar(1) - '0';
 301
 302   return firstDigit * 16 + secondDigit;
 303 }
 304
 305 // Convert decimal integer to 2-character hex string
 306 void wxDecToHex(int dec, char *buf)
 307 {
 308   int firstDigit = (int)(dec/16.0);
 309   int secondDigit = (int)(dec - (firstDigit*16.0));
 310   buf[0] = hexArray[firstDigit];
 311   buf[1] = hexArray[secondDigit];
 312   buf[2] = 0;
 313 }
 314
 315 // Convert decimal integer to 2-character hex string
 316 wxString wxDecToHex(int dec)
 317 {
 318     char buf[3];
 319     wxDecToHex(dec, buf);
 320     return wxString(buf);
 321 }
 322
 323 // Match a string INDEPENDENT OF CASE
 324 bool
 325 StringMatch (char *str1, char *str2, bool subString, bool exact)
 326 {
 327   if (str1 == NULL || str2 == NULL)
 328     return FALSE;
 329   if (str1 == str2)
 330     return TRUE;
 331
 332   if (subString)
 333     {
 334       int len1 = strlen (str1);
 335       int len2 = strlen (str2);
 336       int i;
 337
 338       // Search for str1 in str2
 339       // Slow .... but acceptable for short strings
 340       for (i = 0; i <= len2 - len1; i++)
 341         {
 342           if (strncasecmp (str1, str2 + i, len1) == 0)
 343             return TRUE;
 344         }
 345     }
 346   else if (exact)
 347     {
 348       if (strcasecmp (str1, str2) == 0)
 349         return TRUE;
 350     }
 351   else
 352     {
 353       int len1 = strlen (str1);
 354       int len2 = strlen (str2);
 355
 356       if (strncasecmp (str1, str2, wxMin (len1, len2)) == 0)
 357         return TRUE;
 358     }
 359
 360   return FALSE;
 361 }
 362
 363 // Return the current date/time
 364 // [volatile]
 365 wxString wxNow( void )
 366 {
 367   time_t now = time((time_t *) NULL);
 368   char *date = ctime(&now);
 369   date[24] = '\0';
 370   return wxString(date);
 371 }
 372
 373 /* Get Full RFC822 style email address */
 374 bool
 375 wxGetEmailAddress (char *address, int maxSize)
 376 {
 377   char host[65];
 378   char user[65];
 379
 380   if (wxGetHostName(host, 64) == FALSE)
 381     return FALSE;
 382   if (wxGetUserId(user, 64) == FALSE)
 383     return FALSE;
 384
 385   char tmp[130];
 386   strcpy(tmp, user);
 387   strcat(tmp, "@");
 388   strcat(tmp, host);
 389
 390   strncpy(address, tmp, maxSize - 1);
 391   address[maxSize-1] = '\0';
 392   return TRUE;
 393 }
 394
 395 /*
 396  * Strip out any menu codes
 397  */
 398
 399 char *wxStripMenuCodes (char *in, char *out)
 400 {
 401   if (!in)
 402     return (char *) NULL;
 403
 404   if (!out)
 405     out = copystring(in);
 406
 407   char *tmpOut = out;
 408
 409   while (*in)
 410     {
 411       if (*in == '&')
 412         {
 413           // Check && -> &, &x -> x
 414           if (*++in == '&')
 415             *out++ = *in++;
 416         }
 417       else if (*in == '\t')
 418         {
 419           // Remove all stuff after \t in X mode, and let the stuff as is
 420           // in Windows mode.
 421           // Accelerators are handled in wx_item.cc for Motif, and are not
 422           // YET supported in XView
 423           break;
 424         }
 425       else
 426         *out++ = *in++;
 427     }                           // while
 428
 429   *out = '\0';
 430
 431   return tmpOut;
 432 }
 433
 434 wxString wxStripMenuCodes(const wxString& str)
 435 {
 436     char *buf = new char[str.Length() + 1];
 437     wxStripMenuCodes((char*) (const char*) str, buf);
 438     wxString str1(buf);
 439     delete[] buf;
 440     return str1;
 441 }
 442
 443 /*
 444  * Window search functions
 445  *
 446  */
 447
 448 /*
 449  * If parent is non-NULL, look through children for a label or title
 450  * matching the specified string. If NULL, look through all top-level windows.
 451  *
 452  */
 453
 454 static wxWindow *wxFindWindowByLabel1 (const wxString& title, wxWindow * parent);
 455
 456 wxWindow *
 457 wxFindWindowByLabel (const wxString& title, wxWindow * parent)
 458 {
 459   if (parent)
 460     {
 461       return wxFindWindowByLabel1 (title, parent);
 462     }
 463   else
 464     {
 465       for (wxNode * node = wxTopLevelWindows.First (); node; node = node->Next ())
 466         {
 467           wxWindow *win = (wxWindow *) node->Data ();
 468           wxWindow *retwin = wxFindWindowByLabel1 (title, win);
 469           if (retwin)
 470             return retwin;
 471         }                       // for()
 472
 473     }
 474   return (wxWindow *) NULL;
 475 }
 476
 477 // Recursive
 478 static wxWindow *
 479 wxFindWindowByLabel1 (const wxString& title, wxWindow * parent)
 480 {
 481   if (parent)
 482     {
 483       if (parent->GetLabel() == title)
 484                 return parent;
 485     }
 486
 487   if (parent)
 488     {
 489       for (wxNode * node = parent->GetChildren().First (); node; node = node->Next ())
 490         {
 491           wxWindow *win = (wxWindow *) node->Data ();
 492           wxWindow *retwin = wxFindWindowByLabel1 (title, win);
 493           if (retwin)
 494             return retwin;
 495         }                       // for()
 496
 497     }
 498
 499   return (wxWindow *) NULL;                     // Not found
 500
 501 }
 502
 503 /*
 504  * If parent is non-NULL, look through children for a name
 505  * matching the specified string. If NULL, look through all top-level windows.
 506  *
 507  */
 508
 509 static wxWindow *wxFindWindowByName1 (const wxString& title, wxWindow * parent);
 510
 511 wxWindow *
 512 wxFindWindowByName (const wxString& title, wxWindow * parent)
 513 {
 514   if (parent)
 515     {
 516       return wxFindWindowByName1 (title, parent);
 517     }
 518   else
 519     {
 520       for (wxNode * node = wxTopLevelWindows.First (); node; node = node->Next ())
 521         {
 522           wxWindow *win = (wxWindow *) node->Data ();
 523           wxWindow *retwin = wxFindWindowByName1 (title, win);
 524           if (retwin)
 525             return retwin;
 526         }                       // for()
 527
 528     }
 529   // Failed? Try by label instead.
 530   return wxFindWindowByLabel(title, parent);
 531 }
 532
 533 // Recursive
 534 static wxWindow *
 535 wxFindWindowByName1 (const wxString& title, wxWindow * parent)
 536 {
 537   if (parent)
 538     {
 539         if ( parent->GetName() == title )
 540                         return parent;
 541     }
 542
 543   if (parent)
 544     {
 545       for (wxNode * node = parent->GetChildren().First (); node; node = node->Next ())
 546         {
 547           wxWindow *win = (wxWindow *) node->Data ();
 548           wxWindow *retwin = wxFindWindowByName1 (title, win);
 549           if (retwin)
 550             return retwin;
 551         }                       // for()
 552
 553     }
 554
 555   return (wxWindow *) NULL;                     // Not found
 556
 557 }
 558
 559 // Returns menu item id or -1 if none.
 560 int
 561 wxFindMenuItemId (wxFrame * frame, const wxString& menuString, const wxString& itemString)
 562 {
 563   wxMenuBar *menuBar = frame->GetMenuBar ();
 564   if (!menuBar)
 565     return -1;
 566   return menuBar->FindMenuItem (menuString, itemString);
 567 }
 568
 569 /*
 570 On Fri, 21 Jul 1995, Paul Craven wrote:
 571
 572 > Is there a way to find the path of running program's executable? I can get
 573 > my home directory, and the current directory, but I don't know how to get the
 574 > executable directory.
 575 >
 576
 577 The code below (warty as it is), does what you want on most Unix,
 578 DOS, and Mac platforms (it's from the ALS Prolog main).
 579
 580 || Ken Bowen      Applied Logic Systems, Inc.         PO Box 180,
 581 ||====            Voice:  +1 (617)965-9191            Newton Centre,
 582 ||                FAX:    +1 (617)965-1636            MA  02159  USA
 583                   Email:  ken@als.com        WWW: http://www.als.com
 584 ------------------------------------------------------------------------
 585 */
 586
 587 // This code is commented out but it may be integrated with wxWin at
 588 // a later date, after testing. Thanks Ken!
 589 #if 0
 590
 591 /*--------------------------------------------------------------------*
 592  | whereami is given a filename f in the form:  whereami(argv[0])
 593  | It returns the directory in which the executable file (containing
 594  | this code [main.c] ) may be found.  A dot will be returned to indicate
 595  | the current directory.
 596  *--------------------------------------------------------------------*/
 597
 598 static void
 599 whereami(name)
 600     char *name;
 601 {
 602     register char *cutoff = NULL;       /* stifle -Wall */
 603     register char *s;
 604     register char *t;
 605     int   cc;
 606     char  ebuf[4096];
 607
 608     /*
 609      * See if the file is accessible either through the current directory
 610      * or through an absolute path.
 611      */
 612
 613     if (access(name, R_OK) == 0) {
 614
 615         /*-------------------------------------------------------------*
 616          * The file was accessible without any other work.  But the current
 617          * working directory might change on us, so if it was accessible
 618          * through the cwd, then we should get it for later accesses.
 619          *-------------------------------------------------------------*/
 620
 621         t = imagedir;
 622         if (!absolute_pathname(name)) {
 623 #if defined(DOS) || defined(__WIN32__)
 624             int   drive;
 625             char *newrbuf;
 626
 627             newrbuf = imagedir;
 628 #ifndef __DJGPP__
 629             if (*(name + 1) == ':') {
 630                 if (*name >= 'a' && *name <= 'z')
 631                     drive = (int) (*name - 'a' + 1);
 632                 else
 633                     drive = (int) (*name - 'A' + 1);
 634                 *newrbuf++ = *name;
 635                 *newrbuf++ = *(name + 1);
 636                 *newrbuf++ = DIR_SEPARATOR;
 637             }
 638             else {
 639                 drive = 0;
 640                 *newrbuf++ = DIR_SEPARATOR;
 641             }
 642             if (getcwd(newrbuf, drive) == 0) {  /* } */
 643 #else
 644             if (getcwd(newrbuf, 1024) == 0) {   /* } */
 645 #endif
 646 #else  /* DOS */
 647 #ifdef HAVE_GETWD
 648             if (getwd(imagedir) == 0) {         /* } */
 649 #else  /* !HAVE_GETWD */
 650             if (getcwd(imagedir, 1024) == 0) {
 651 #endif /* !HAVE_GETWD */
 652 #endif /* DOS */
 653                 fatal_error(FE_GETCWD, 0);
 654             }
 655             for (; *t; t++)     /* Set t to end of buffer */
 656                 ;
 657             if (*(t - 1) == DIR_SEPARATOR)      /* leave slash if already
 658                                                  * last char
 659                                                  */
 660                 cutoff = t - 1;
 661             else {
 662                 cutoff = t;     /* otherwise put one in */
 663                 *t++ = DIR_SEPARATOR;
 664             }
 665         }
 666 #if (!defined(__MAC__) && !defined(__DJGPP__) && !defined(__GO32__) && !defined(__WIN32__))
 667         else
 668                 (*t++ = DIR_SEPARATOR);
 669 #endif
 670
 671         /*-------------------------------------------------------------*
 672          * Copy the rest of the string and set the cutoff if it was not
 673          * already set.  If the first character of name is a slash, cutoff
 674          * is not presently set but will be on the first iteration of the
 675          * loop below.
 676          *-------------------------------------------------------------*/
 677
 678         for ((*name == DIR_SEPARATOR ? (s = name+1) : (s = name));;) {
 679             if (*s == DIR_SEPARATOR)
 680                         cutoff = t;
 681             if (!(*t++ = *s++))
 682                         break;
 683         }
 684
 685     }
 686     else {
 687
 688         /*-------------------------------------------------------------*
 689          * Get the path list from the environment.  If the path list is
 690          * inaccessible for any reason, leave with fatal error.
 691          *-------------------------------------------------------------*/
 692
 693 #ifdef __MAC__
 694         if ((s = getenv("Commands")) == (char *) 0)
 695 #else
 696         if ((s = getenv("PATH")) == (char *) 0)
 697 #endif
 698             fatal_error(FE_PATH, 0);
 699
 700         /*
 701          * Copy path list into ebuf and set the source pointer to the
 702          * beginning of this buffer.
 703          */
 704
 705         strcpy(ebuf, s);
 706         s = ebuf;
 707
 708         for (;;) {
 709             t = imagedir;
 710             while (*s && *s != PATH_SEPARATOR)
 711                 *t++ = *s++;
 712             if (t > imagedir && *(t - 1) == DIR_SEPARATOR)
 713                 ;               /* do nothing -- slash already is in place */
 714             else
 715                 *t++ = DIR_SEPARATOR;   /* put in the slash */
 716             cutoff = t - 1;     /* set cutoff */
 717             strcpy(t, name);
 718             if (access(imagedir, R_OK) == 0)
 719                 break;
 720
 721             if (*s)
 722                 s++;            /* advance source pointer */
 723             else
 724                 fatal_error(FE_INFND, 0);
 725         }
 726
 727     }
 728
 729     /*-------------------------------------------------------------*
 730      | At this point the full pathname should exist in imagedir and
 731      | cutoff should be set to the final slash.  We must now determine
 732      | whether the file name is a symbolic link or not and chase it down
 733      | if it is.  Note that we reuse ebuf for getting the link.
 734      *-------------------------------------------------------------*/
 735
 736 #ifdef HAVE_SYMLINK
 737     while ((cc = readlink(imagedir, ebuf, 512)) != -1) {
 738         ebuf[cc] = 0;
 739         s = ebuf;
 740         if (*s == DIR_SEPARATOR) {
 741             t = imagedir;
 742         }
 743         else {
 744             t = cutoff + 1;
 745         }
 746         for (;;) {
 747             if (*s == DIR_SEPARATOR)
 748                 cutoff = t;     /* mark the last slash seen */
 749             if (!(*t++ = *s++)) /* copy the character */
 750                 break;
 751         }
 752     }
 753
 754 #endif /* HAVE_SYMLINK */
 755
 756     strcpy(imagename, cutoff + 1);      /* keep the image name */
 757     *(cutoff + 1) = 0;          /* chop off the filename part */
 758 }
 759
 760 #endif
 761
 762 /*
 763  * N.B. these convenience functions must be separate from msgdlgg.cpp, textdlgg.cpp
 764  * since otherwise the generic code may be pulled in unnecessarily.
 765  */
 766
 767 int wxMessageBox(const wxString& message, const wxString& caption, long style,
 768                  wxWindow *parent, int WXUNUSED(x), int WXUNUSED(y) )
 769 {
 770     wxMessageDialog dialog(parent, message, caption, style);
 771
 772     int ans = dialog.ShowModal();
 773     switch ( ans )
 774     {
 775         case wxID_OK:
 776             return wxOK;
 777             break;
 778         case wxID_YES:
 779             return wxYES;
 780             break;
 781         case wxID_NO:
 782             return wxNO;
 783             break;
 784         default:
 785         case wxID_CANCEL:
 786             return wxCANCEL;
 787             break;
 788     }
 789     return ans;
 790 }
 791
 792 wxString wxGetTextFromUser(const wxString& message, const wxString& caption,
 793                         const wxString& defaultValue, wxWindow *parent,
 794                         int x, int y, bool WXUNUSED(centre) )
 795 {
 796     wxTextEntryDialog dialog(parent, message, caption, defaultValue, wxOK|wxCANCEL, wxPoint(x, y));
 797     if (dialog.ShowModal() == wxID_OK)
 798         return dialog.GetValue();
 799     else
 800         return wxString("");
 801 }
 802
 803 #ifdef __MWERKS__
 804 char *strdup(const char *s)
 805 {
 806         return strcpy( (char*) malloc( strlen( s ) + 1 ) , s ) ;
 807 }
 808
 809 int     isascii( int c )
 810 {
 811         return ( c >= 0 && c < 128 ) ;
 812 }
 813 #endif