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non blocking getchar.. big problem :(

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kazuyaz kazuyaz is offline Offline
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non blocking getchar.. big problem :(

 
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  #1
Apr 19th, 2007
hi,
does anyone knows if is there a way to make getchar non blocking?

I'm using curses and I'm on linux platform. With a thread version of the same program I have solved my problems with getch and with the timeout function but now the program doesn't work properly and I must use
C Syntax (Toggle Plain Text) 
  1.  
  2. c=getchar();    
  3. if (c==0) c=getch();
Using timeout(1) makes non blocking only the c=getch part of this code but not the getchar one.

I have tried to solve this problem using this function
C Syntax (Toggle Plain Text) 
  1. int kbhit(void)
  2.  
  3. {
  4.  
  5. struct timeval tv;
  6.  
  7. fd_set read_fd;
  8.  
  9. tv.tv_sec=0;
  10.  
  11. tv.tv_usec=0;
  12.  
  13. FD_ZERO(&read_fd);
  14.  
  15. FD_SET(0,&read_fd);
  16.  
  17. if(select(1, &read_fd, NULL, NULL, &tv) == -1)
  18.  
  19. return 0;
  20.  
  21. if(FD_ISSET(0,&read_fd))
  22.  
  23. return 1;
  24.  
  25. return 0;
  26.  
  27. }

and this code
C Syntax (Toggle Plain Text) 
  1. if (kbhit()) 
  2.      c = getchar();
but the program doesn't work properly...

Does anyone knows a solution?

I'm 5 days in a row searching of solve this big problem unhappy
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Re: non blocking getchar.. big problem :(

 
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  #2
Apr 19th, 2007
does anyone has a idea?
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Re: non blocking getchar.. big problem :(

 
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  #3
Apr 19th, 2007
The solution is not to use functions that compromise portability.
*Voted best profile in the world*
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Re: non blocking getchar.. big problem :(

 
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  #4
Apr 19th, 2007
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Originally Posted by iamthwee View Post
The solution is not to use functions that compromise portability.
yes, getchar() is portable however..
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Re: non blocking getchar.. big problem :(

 
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  #5
Apr 23rd, 2007
no one?
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