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Eliminate switch statement by using contiguous character ranges

This commit is contained in:
Christopher Browne 2016-02-08 11:25:55 -05:00
parent bbcc1046a6
commit 8079dc0682

View file

@ -120,6 +120,7 @@ const macro_t *action_get_macro(keyrecord_t *record, uint8_t id, uint8_t opt)
{ {
uint8_t clockbyte=0; uint8_t clockbyte=0;
clockbyte = TCNT1 % 256; clockbyte = TCNT1 % 256;
uint8_t rval;
// MACRODOWN only works in this function // MACRODOWN only works in this function
switch(id) { switch(id) {
case M_LED: case M_LED:
@ -143,53 +144,14 @@ const macro_t *action_get_macro(keyrecord_t *record, uint8_t id, uint8_t opt)
/* Generate, based on random number generator, a keystroke for /* Generate, based on random number generator, a keystroke for
a numeric digit chosen at random */ a numeric digit chosen at random */
random_value = ((random_value + randadd) * randmul) % randmod; 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 /* 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 clocks via XOR in the theory that this may be more random
than either separately */ 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; break;
case M_RANDLETTER: case M_RANDLETTER:
@ -199,112 +161,10 @@ 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 clocks via XOR in the theory that this may be more random
than either separately */ than either separately */
random_value = ((random_value + randadd) * randmul) % randmod; 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; break;
} }