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Eliminate switch statement by using contiguous character ranges

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This commit is contained in:
Christopher Browne 2016-02-08 11:25:55 -05:00
parent bbcc1046a6
commit 8079dc0682
1 changed files with 12 additions and 152 deletions
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164
keyboard/planck/keymaps/cbbrowne/keymap.c
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@ -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 */
switch ((random_value ^ clockbyte) % 10) {
case 0:
register_code (KC_0);
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;
}
rval = (random_value ^ clockbyte) % 10;
/* Note that KC_1 thru KC_0 are a contiguous range */
register_code (KC_1 + rval);
unregister_code (KC_1 + rval);
}
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)
switch((random_value ^ clockbyte) % 26) {
case 0:
register_code(KC_A);
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;
}
if (record->event.pressed) {
rval = (random_value ^ clockbyte) % 26;
register_code (KC_A + rval);
unregister_code (KC_A + rval);
}
break;
}
return MACRO_NONE;