[A89] switch/case and KEY_(arrow)s

To: <assembly-89@lists.ticalc.org>
Subject: [A89] switch/case and KEY_(arrow)s
From: "Miles Raymond" <m_rayman@bigfoot.com>
Date: Sun, 15 Jul 2001 21:28:58 -0500
Organization: HomeTech
References: <5.1.0.14.0.20010520173132.03758d78@mail.passagen.se> <5.1.0.14.0.20010520183237.03d34ec8@mail.passagen.se> <5.1.0.14.0.20010520232947.03c54930@mail.passagen.se>
Reply-To: assembly-89@lists.ticalc.org


I only program for the 89.  I was using a switch case structure:
  switch(in_key)
   case KEY_DOWNLEFT:
    if(y<15)
     y++;
   case KEY_LEFT:
    if(x>0)
     x--;
    break;
   case KEY_UPLEFT:
    if(x>0)
     x--;
   case KEY_UP:
    if(y>0)
     y--;
    break;
   case KEY_UPRIGHT:
    if(y>0)
     y--;
   case KEY_RIGHT:
    if(x<15)
     x++;
    break;
   case KEY_DOWNRIGHT:
    if(x<15)
     x++;
   case KEY_DOWN:
    if(y<15)
     y++;
    break;
   case KEY_F1:
    ChangeBlock(x,y,A_REVERSE,A_REVERSE);
    break;
   case KEY_F2:
    ChangeBlock(x,y,A_NORMAL,A_REVERSE);
    break;
   case KEY_F3:
    ChangeBlock(x,y,A_REVERSE,A_NORMAL);
    break;
   case KEY_F4:
    ChangeBlock(x,y,A_NORMAL,A_NORMAL);
    break;
   default:

Anyway, I kept getting a lot of compiler errors and eventually found in the
docs that the arrow keys such as KEY_LEFT aren't really constants and can't
be used in a switch/case structure.  My question is, since I only specify
that I want an 89 program output, can't the compiler insert the constants
for the 89 instead of using the macros or whatever it uses now?

Since the way I set up the switch/case statement is a lot nicer than an
if/elseif structure:
  if(in_key==KEY_DOWNLEFT)
  {
   if(y<15)
    y++;
   if(x>0)
    x--;
  }
  else if(in_key==KEY_LEFT)
  {
   if(x>0)
    x--;
  }
  else if(in_key==KEY_UPLEFT)
  {
   if(x>0)
    x--;
   if(y>0)
    y--;
  }
  else if(in_key==KEY_UP)
  {
   if(y>0)
    y--;
  }
  else if(in_key==KEY_UPRIGHT)
  {
   if(y>0)
    y--;
   if(x<15)
    x++;
  }
  else if(in_key==KEY_RIGHT)
  {
   if(x<15)
    x++;
  }
  else if(in_key==KEY_DOWNRIGHT)
  {
   if(x<15)
    x++;
   if(y<15)
    y++;
  }
  else if(in_key==KEY_DOWN)
  {
   if(y<15)
    y++;
  }
  else if(in_key==KEY_F1)
  {
   ChangeBlock(x,y,A_REVERSE,A_REVERSE);
  }
  else if(in_key==KEY_F2)
  {
   ChangeBlock(x,y,A_NORMAL,A_REVERSE);
  }
  else if(in_key==KEY_F3)
  {
   ChangeBlock(x,y,A_REVERSE,A_NORMAL);
  }
  else if(in_key==KEY_F4)
  {
   ChangeBlock(x,y,A_NORMAL,A_NORMAL);
  }

And now I get errors for KEY_UPLEFT and KEY_DOWNRIGHT!?  Why aren't these in
the docs?

-Miles Raymond      EML: m_rayman@bigfoot.com
AIM: Killer2Ray     ICQ: 13217756       IRC: Killer2
WWW: http://www.bigfoot.com/~m_rayman