Eliminate switch statement by using contiguous character ranges

keyboard/planck/keymaps/cbbrowne/keymap.c

@@ -120,6 +120,7 @@ const macro_t *action_get_macro(keyrecord_t *record, uint8_t id, uint8_t opt)
 {
   uint8_t clockbyte=0;
   clockbyte = TCNT1 % 256;
+  uint8_t rval;
   // MACRODOWN only works in this function
   switch(id) {
   case M_LED:
@@ -143,54 +144,15 @@ const macro_t *action_get_macro(keyrecord_t *record, uint8_t id, uint8_t opt)
     /* Generate, based on random number generator, a keystroke for
        a numeric digit chosen at random */
     random_value = ((random_value + randadd) * randmul) % randmod;
-    if (record->event.pressed)
+    if (record->event.pressed) {
-
       /* Here, we mix the LCRNG with low bits from one of the system
          clocks via XOR in the theory that this may be more random
          than either separately */ 
-
+      rval = (random_value ^ clockbyte) % 10;
-      switch ((random_value ^ clockbyte) % 10) {
+      /* Note that KC_1 thru KC_0 are a contiguous range */
-      case 0:
+      register_code (KC_1 + rval);
-	register_code (KC_0);
+      unregister_code (KC_1 + rval);
-	unregister_code (KC_0);
+    }
-	break;
-      case 1:
-	register_code (KC_1);
-	unregister_code (KC_1);
-	break;
-      case 2:
-	register_code (KC_2);
-	unregister_code (KC_2);
-	break;
-      case 3:
-	register_code (KC_3);
-	unregister_code (KC_3);
-	break;
-      case 4:
-	register_code (KC_4);
-	unregister_code (KC_4);
-	break;
-      case 5:
-	register_code (KC_5);
-	unregister_code (KC_5);
-	break;
-      case 6:
-	register_code (KC_6);
-	unregister_code (KC_6);
-	break;
-      case 7:
-	register_code (KC_7);
-	unregister_code (KC_7);
-	break;
-      case 8:
-	register_code (KC_8);
-	unregister_code (KC_8);
-	break;
-      case 9:
-	register_code (KC_9);
-	unregister_code (KC_9);
-	break;
-      }
     break;
   case M_RANDLETTER:
     /* Generate, based on random number generator, a keystroke for
@@ -199,113 +161,11 @@ const macro_t *action_get_macro(keyrecord_t *record, uint8_t id, uint8_t opt)
        clocks via XOR in the theory that this may be more random
        than either separately */ 
     random_value = ((random_value + randadd) * randmul) % randmod;
-    if (record->event.pressed) 
+    if (record->event.pressed) {
-      switch((random_value ^ clockbyte) % 26) {
+      rval = (random_value ^ clockbyte) % 26;
-      case 0:
+      register_code (KC_A + rval);
-	register_code(KC_A);
+      unregister_code (KC_A + rval);
-	unregister_code(KC_A);
+    }
-	break;
-      case 1:
-	register_code(KC_B);
-	unregister_code(KC_B);
-	break;
-      case 2:
-	register_code(KC_C);
-	unregister_code(KC_C);
-	break;
-      case 3:
-	register_code(KC_D);
-	unregister_code(KC_D);
-	break;
-      case 4:
-	register_code(KC_E);
-	unregister_code(KC_E);
-	break;
-      case 5:
-	register_code(KC_F);
-	unregister_code(KC_F);
-	break;
-      case 6:
-	register_code(KC_G);
-	unregister_code(KC_G);
-	break;
-      case 7:
-	register_code(KC_H);
-	unregister_code(KC_H);
-	break;
-      case 8:
-	register_code(KC_I);
-	unregister_code(KC_I);
-	break;
-      case 9:
-	register_code(KC_J);
-	unregister_code(KC_J);
-	break;
-      case 10:
-	register_code(KC_K);
-	unregister_code(KC_K);
-	break;
-      case 11:
-	register_code(KC_L);
-	unregister_code(KC_L);
-	break;
-      case 12:
-	register_code(KC_M); 
-	unregister_code(KC_M); 
-	break;
-      case 13:
-	register_code(KC_N);
-	unregister_code(KC_N);
-	break;
-      case 14:
-	register_code(KC_O);
-	unregister_code(KC_O);
-	break;
-      case 15:
-	register_code(KC_P);
-	unregister_code(KC_P);
-	break;
-      case 16:
-	register_code(KC_Q);
-	unregister_code(KC_Q);
-	break;
-      case 17:
-	register_code(KC_R);
-	unregister_code(KC_R);
-	break;
-      case 18:
-	register_code(KC_S);
-	unregister_code(KC_S);
-	break;
-      case 19:
-	register_code(KC_T);
-	unregister_code(KC_T);
-	break;
-      case 20:
-	register_code(KC_U);
-	unregister_code(KC_U);
-	break;
-      case 21:
-	register_code(KC_V);
-	unregister_code(KC_V);
-	break;
-      case 22:
-	register_code(KC_W);
-	unregister_code(KC_W);
-	break;
-      case 23:
-	register_code(KC_X);
-	unregister_code(KC_X);
-	break;
-      case 24:
-	register_code(KC_Y);
-	unregister_code(KC_Y);
-	break;
-      case 25:
-	register_code(KC_Z);
-      unregister_code(KC_Z);
-      break;
-      }
     break;
   }
   return MACRO_NONE;