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Diff for /gforth/engine/io.c between versions 1.10 and 1.22

version 1.10, 1999/02/28 08:37:45 version 1.22, 2006/04/09 08:04:22
Line 1 Line 1
 /* direct key io driver  /* direct key io driver
   
   Copyright (C) 1995,1996,1997,1998 Free Software Foundation, Inc.    Copyright (C) 1995,1996,1997,1998,1999,2002,2003 Free Software Foundation, Inc.
   
   This file is part of Gforth.    This file is part of Gforth.
   
Line 16 Line 16
   
   You should have received a copy of the GNU General Public License    You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software    along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
   
   The following is stolen from the readline library for bash    The following is stolen from the readline library for bash
 */  */
Line 26 Line 26
 */  */
   
 #include "config.h"  #include "config.h"
   #include "forth.h"
 #include <sys/time.h>  #include <sys/time.h>
 #include <sys/types.h>  #include <sys/types.h>
 #include <unistd.h>  #include <unistd.h>
Line 51  typedef unsigned int uint32_t; Line 52  typedef unsigned int uint32_t;
 #include <sys/filio.h>  #include <sys/filio.h>
 #endif  #endif
 #include <setjmp.h>  #include <setjmp.h>
 #include "forth.h"  
 #include "io.h"  #include "io.h"
   
 #ifndef MSDOS  #ifndef MSDOS
Line 447  void deprep_terminal () Line 447  void deprep_terminal ()
 #define VTIME VEOL  #define VTIME VEOL
 #endif  #endif
   
   #include <locale.h>
   
 void prep_terminal ()  void prep_terminal ()
 {  {
   int tty = fileno (stdin);    int tty = fileno (stdin);
Line 472  void prep_terminal () Line 474  void prep_terminal ()
     return;      /* added by MdG */      return;      /* added by MdG */
   }      /* added by MdG */    }      /* added by MdG */
         
     setlocale(LC_ALL, "");
   
   /* Try to keep this function from being INTerrupted.  We can do it    /* Try to keep this function from being INTerrupted.  We can do it
      on POSIX and systems with BSD-like signal handling. */       on POSIX and systems with BSD-like signal handling. */
 #if defined (HAVE_POSIX_SIGNALS)  #if defined (HAVE_POSIX_SIGNALS)
Line 613  void deprep_terminal () Line 617  void deprep_terminal ()
 }  }
 #endif  /* NEW_TTY_DRIVER */  #endif  /* NEW_TTY_DRIVER */
   
 /* If a character is available to be read, then read it  
    and stuff it into IBUFFER.  Otherwise, just return. */  
   
 long pending = -1L;  
   
 long key_avail (FILE * stream)  long key_avail (FILE * stream)
 {  {
   int tty = fileno (stream);    int tty = fileno (stream);
   int chars_avail = pending;    fd_set selin;
   int result;    static int now[2] = { 0 , 0 };
     int res;
   if(!terminal_prepped)  prep_terminal();  
     setvbuf(stream, NULL, _IONBF, 0);
 #ifndef _WIN32    if(!terminal_prepped && stream == stdin)
   if(isatty (tty)) {      prep_terminal();
     result = ioctl (tty, FIONREAD, &chars_avail);  
   }    FD_ZERO(&selin);
 #else    FD_SET(tty, &selin);
   {    return select(1, &selin, NULL, NULL, now);
     fd_set selin;  
     static int now[2] = { 0 , 0 };  
     int res;  
       
     FD_ZERO(&selin);  
     FD_SET(tty, &selin);  
     chars_avail=select(1, &selin, NULL, NULL, now);  
   }  
 #endif  
     
   if(chars_avail == -1L) {  
     unsigned char inchar;  
       
     fcntl(tty, F_SETFL, O_NDELAY);  
     result = read(tty, &inchar, sizeof(char));  
     if(result == sizeof(char)) {  
       chars_avail = 1;  
       pending = (long)inchar;  
     } else {  
       chars_avail = 0;  
     }  
     fcntl(tty, F_SETFL, 0);  
   }  
   
   return chars_avail;  
 }  }
   
 /* Get a key from the buffer of characters to be read.  /* Get a key from the buffer of characters to be read.
Line 666  long key_avail (FILE * stream) Line 640  long key_avail (FILE * stream)
 /* When compiling and running in the `Posix' environment, Ultrix does  /* When compiling and running in the `Posix' environment, Ultrix does
    not restart system calls, so this needs to do it. */     not restart system calls, so this needs to do it. */
   
 unsigned getkey(FILE * stream)  Cell getkey(FILE * stream)
 {  {
   int result;    Cell result;
   unsigned char c;    unsigned char c;
   
   if(!terminal_prepped)  prep_terminal();    if(!terminal_prepped && stream == stdin)
       prep_terminal();
   while (pending < 0)  
     {  
       result = read (fileno (stream), &c, sizeof (char));  
   
       if (result == sizeof (char))  
         return /* (c == 0x7F ? 0x08 :*/ c /*)*/;  
   
       /* If zero characters are returned, then the file that we are  
          reading from is empty!  Return EOF in that case. */  
       if (result == 0)  
         return (EOF);  
   
       /* If the error that we received was SIGINT, then try again,  
          this is simply an interrupted system call to read ().  
          Otherwise, some error ocurred, also signifying EOF. */  
       if (errno != EINTR)  
         return (EOF);  
     }  
   
   result = (int) pending;  
   pending = -1L;  
   
   return result;    result = fread(&c, sizeof(c), 1, stream);
     return result==0 ? EOF : c;
 }  }
   
 #ifdef TEST  #ifdef TEST
Removed from v.1.10  
changed lines
  Added in v.1.22

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