Date:	Fri, 17 May 2002 20:28:32 +0200 (MEST)
From:	ahelm AT gmx DOT net
To:	djgpp AT delorie DOT com
MIME-Version:	1.0
Subject:	How to avoid kbhit() and getkey() ?
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Reply-To:	djgpp AT delorie DOT com

Hi,

I'm using kbhit() and getkey() for simple user interaction
e.g. yes/no or "any key" questions. But this is very DJGPP
specific. Is there a way to write these things more portable,
especially for UNIX environments?

There are 2 main functionalities:
1) empty the keyboard buffer:
while(kbhit())
{
  getkey();
}

2) wait for and read a single key
x = getkey();


A typical application of this might look like:

int yes_no(char *question)
{
  int key   = -1;
  int count = 100;

  while(kbhit())
  {
    getkey();
  }

  if(question)
  {
    printf("%s (Y/N)\n", question);
  }
  else
  {
    printf("(Y/N)\n");
  }

  while(count--)
  {
    key = getkey();

    switch(key)
    {
      case 'y':
      case 'Y':
        return 1;
      case 'n':
      case 'N':
        return 0;
      default:
        break;
    }
  }

  return -1;

} /* End yes_no() */


Any brilliant ideas?

Regards,

Tony

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