keyboard.c

   1 #include <string.h>
   2 #include <stdlib.h>
   3 #include <stdio.h>
   4 #include <SDL/SDL.h>
   5
   6 Uint8 *oldkeys=NULL;
   7
   8 DECLSPEC int isKeyDown(int key) {
   9 int num = 0;
  10 Uint8 *keystate = SDL_GetKeyState(&num);
  11 return keystate[key]? 1:0;
  12 }
  13
  14 DECLSPEC int isKeyPressed(int key) {
  15 int num;
  16 int ret=0;
  17 Uint8 *keystate = SDL_GetKeyState(&num);
  18 if (oldkeys==NULL)
  19 oldkeys=calloc(num,1);
  20 if (keystate[key]&&!oldkeys[key])
  21 ret=1;
  22 oldkeys[key] = keystate[key];
  23 return ret;
  24 }
  25
  26 DECLSPEC int isKeyReleased(int key) {
  27 int num;
  28 int ret=0;
  29 Uint8 *keystate = SDL_GetKeyState(&num);
  30 if (oldkeys==NULL)
  31 oldkeys=calloc(num,1);
  32 if (!keystate[key]&&oldkeys[key])
  33 ret=1;
  34 oldkeys[key] = keystate[key];
  35 return ret;
  36 }
  37
  38 DECLSPEC int getPressedKey() {
  39 int i;
  40 for (i = 1; i < SDLK_LAST; i++)
  41 if (isKeyPressed(i))
  42 return i;
  43 return 0;
  44 }
  45
  46 DECLSPEC int getReleasedKey() {
  47 int i;
  48 for (i = 1; i < SDLK_LAST; i++)
  49 if (isKeyReleased(i))
  50 return i;
  51 return 0;
  52 }
  53
  54 DECLSPEC char getPressedChar() {
  55 // nead to use the window queue for this
  56 char ret;
  57 SDL_Event evt;
  58 if (!SDL_PollEvent(&evt))
  59 return 0;
  60 if (evt.type!=SDL_KEYDOWN)
  61 return 0;
  62 ret = evt.key.keysym.unicode&0x7F;
  63 return ret;
  64 }