Add in XOR of lowest 8 bits of system timer to encourage more randomness of the digits/letters chosen
This commit is contained in:
Christopher Browne
@@ -118,6 +118,8 @@ static uint16_t random_value = 157;
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const macro_t *action_get_macro(keyrecord_t *record, uint8_t id, uint8_t opt)
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{
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uint8_t clockbyte=0;
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clockbyte = TCNT1 % 256;
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// MACRODOWN only works in this function
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switch(id) {
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case M_LED:
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@@ -141,161 +143,169 @@ const macro_t *action_get_macro(keyrecord_t *record, uint8_t id, uint8_t opt)
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/* Generate, based on random number generator, a keystroke for
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a numeric digit chosen at random */
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random_value = ((random_value + randadd) * randmul) % randmod;
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if (record->event.pressed)
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switch(random_value % 10) {
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case 0:
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register_code (KC_0);
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unregister_code (KC_0);
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break;
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case 1:
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register_code (KC_1);
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unregister_code (KC_1);
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break;
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case 2:
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register_code (KC_2);
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unregister_code (KC_2);
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break;
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case 3:
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register_code (KC_3);
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unregister_code (KC_3);
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break;
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case 4:
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register_code (KC_4);
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unregister_code (KC_4);
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break;
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case 5:
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register_code (KC_5);
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unregister_code (KC_5);
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break;
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case 6:
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register_code (KC_6);
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unregister_code (KC_6);
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break;
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case 7:
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register_code (KC_7);
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unregister_code (KC_7);
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break;
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case 8:
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register_code (KC_8);
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unregister_code (KC_8);
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break;
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case 9:
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register_code (KC_9);
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unregister_code (KC_9);
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break;
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}
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if (record->event.pressed)
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/* Here, we mix the LCRNG with low bits from one of the system
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clocks via XOR in the theory that this may be more random
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than either separately */
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switch ((random_value ^ clockbyte) % 10) {
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case 0:
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register_code (KC_0);
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unregister_code (KC_0);
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break;
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case 1:
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register_code (KC_1);
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unregister_code (KC_1);
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break;
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case 2:
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register_code (KC_2);
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unregister_code (KC_2);
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break;
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case 3:
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register_code (KC_3);
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unregister_code (KC_3);
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break;
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case 4:
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register_code (KC_4);
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unregister_code (KC_4);
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break;
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case 5:
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register_code (KC_5);
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unregister_code (KC_5);
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break;
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case 6:
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register_code (KC_6);
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unregister_code (KC_6);
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break;
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case 7:
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register_code (KC_7);
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unregister_code (KC_7);
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break;
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case 8:
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register_code (KC_8);
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unregister_code (KC_8);
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break;
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case 9:
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register_code (KC_9);
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unregister_code (KC_9);
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break;
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}
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break;
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case M_RANDLETTER:
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/* Generate, based on random number generator, a keystroke for
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a letter chosen at random */
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/* Here, we mix the LCRNG with low bits from one of the system
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clocks via XOR in the theory that this may be more random
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than either separately */
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random_value = ((random_value + randadd) * randmul) % randmod;
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if (record->event.pressed)
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switch(random_value % 26) {
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case 0:
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register_code(KC_A);
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unregister_code(KC_A);
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break;
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case 1:
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register_code(KC_B);
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unregister_code(KC_B);
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break;
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case 2:
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register_code(KC_C);
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unregister_code(KC_C);
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break;
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case 3:
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register_code(KC_D);
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unregister_code(KC_D);
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break;
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case 4:
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register_code(KC_E);
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unregister_code(KC_E);
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break;
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case 5:
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register_code(KC_F);
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unregister_code(KC_F);
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break;
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case 6:
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register_code(KC_G);
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unregister_code(KC_G);
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break;
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case 7:
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register_code(KC_H);
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unregister_code(KC_H);
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break;
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case 8:
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register_code(KC_I);
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unregister_code(KC_I);
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break;
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case 9:
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register_code(KC_J);
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unregister_code(KC_J);
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break;
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case 10:
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register_code(KC_K);
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unregister_code(KC_K);
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break;
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case 11:
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register_code(KC_L);
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unregister_code(KC_L);
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break;
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case 12:
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register_code(KC_M);
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unregister_code(KC_M);
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break;
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case 13:
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register_code(KC_N);
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unregister_code(KC_N);
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break;
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case 14:
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register_code(KC_O);
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unregister_code(KC_O);
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break;
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case 15:
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register_code(KC_P);
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unregister_code(KC_P);
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break;
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case 16:
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register_code(KC_Q);
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unregister_code(KC_Q);
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break;
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case 17:
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register_code(KC_R);
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unregister_code(KC_R);
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break;
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case 18:
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register_code(KC_S);
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unregister_code(KC_S);
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break;
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case 19:
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register_code(KC_T);
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unregister_code(KC_T);
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break;
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case 20:
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register_code(KC_U);
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unregister_code(KC_U);
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break;
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case 21:
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register_code(KC_V);
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unregister_code(KC_V);
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break;
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case 22:
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register_code(KC_W);
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unregister_code(KC_W);
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break;
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case 23:
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register_code(KC_X);
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unregister_code(KC_X);
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break;
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case 24:
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register_code(KC_Y);
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unregister_code(KC_Y);
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break;
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case 25:
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register_code(KC_Z);
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switch((random_value ^ clockbyte) % 26) {
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case 0:
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register_code(KC_A);
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unregister_code(KC_A);
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break;
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case 1:
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register_code(KC_B);
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unregister_code(KC_B);
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break;
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case 2:
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register_code(KC_C);
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unregister_code(KC_C);
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break;
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case 3:
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register_code(KC_D);
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unregister_code(KC_D);
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break;
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case 4:
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register_code(KC_E);
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unregister_code(KC_E);
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break;
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case 5:
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register_code(KC_F);
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unregister_code(KC_F);
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break;
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case 6:
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register_code(KC_G);
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unregister_code(KC_G);
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break;
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case 7:
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register_code(KC_H);
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unregister_code(KC_H);
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break;
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case 8:
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register_code(KC_I);
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unregister_code(KC_I);
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break;
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case 9:
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register_code(KC_J);
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unregister_code(KC_J);
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break;
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case 10:
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register_code(KC_K);
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unregister_code(KC_K);
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break;
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case 11:
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register_code(KC_L);
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unregister_code(KC_L);
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break;
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case 12:
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register_code(KC_M);
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unregister_code(KC_M);
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break;
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case 13:
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register_code(KC_N);
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unregister_code(KC_N);
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break;
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case 14:
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register_code(KC_O);
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unregister_code(KC_O);
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break;
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case 15:
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register_code(KC_P);
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unregister_code(KC_P);
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break;
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case 16:
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register_code(KC_Q);
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unregister_code(KC_Q);
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break;
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case 17:
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register_code(KC_R);
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unregister_code(KC_R);
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break;
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case 18:
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register_code(KC_S);
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unregister_code(KC_S);
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break;
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case 19:
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register_code(KC_T);
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unregister_code(KC_T);
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break;
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case 20:
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register_code(KC_U);
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unregister_code(KC_U);
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break;
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case 21:
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register_code(KC_V);
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unregister_code(KC_V);
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break;
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case 22:
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register_code(KC_W);
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unregister_code(KC_W);
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break;
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case 23:
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register_code(KC_X);
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unregister_code(KC_X);
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break;
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case 24:
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register_code(KC_Y);
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unregister_code(KC_Y);
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break;
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case 25:
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register_code(KC_Z);
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unregister_code(KC_Z);
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break;
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}
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}
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break;
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}
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return MACRO_NONE;
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