diff options
author | vin <git@vineetk.net> | 2024-01-15 18:52:15 -0500 |
---|---|---|
committer | vin <git@vineetk.net> | 2024-01-15 18:52:15 -0500 |
commit | 39b43b676e9aa8f549fea6fca7a6b7fd7891de69 (patch) | |
tree | 2559e89a4398c5bbe278c01f7549a9cfde3b6d7f /lib/lib8tion/random8.h | |
parent | 8c8e1ad4d3f6a197cc7a0550940e0c71d84c050e (diff) |
remove more unused libraries
Diffstat (limited to 'lib/lib8tion/random8.h')
-rw-r--r-- | lib/lib8tion/random8.h | 94 |
1 files changed, 0 insertions, 94 deletions
diff --git a/lib/lib8tion/random8.h b/lib/lib8tion/random8.h deleted file mode 100644 index 7ee67cbb36..0000000000 --- a/lib/lib8tion/random8.h +++ /dev/null @@ -1,94 +0,0 @@ -#ifndef __INC_LIB8TION_RANDOM_H -#define __INC_LIB8TION_RANDOM_H -///@ingroup lib8tion - -///@defgroup Random Fast random number generators -/// Fast 8- and 16- bit unsigned random numbers. -/// Significantly faster than Arduino random(), but -/// also somewhat less random. You can add entropy. -///@{ - -// X(n+1) = (2053 * X(n)) + 13849) -#define FASTLED_RAND16_2053 ((uint16_t)(2053)) -#define FASTLED_RAND16_13849 ((uint16_t)(13849)) - -/// random number seed -extern uint16_t rand16seed;// = RAND16_SEED; - -/// Generate an 8-bit random number -LIB8STATIC uint8_t random8(void) -{ - rand16seed = (rand16seed * FASTLED_RAND16_2053) + FASTLED_RAND16_13849; - // return the sum of the high and low bytes, for better - // mixing and non-sequential correlation - return (uint8_t)(((uint8_t)(rand16seed & 0xFF)) + - ((uint8_t)(rand16seed >> 8))); -} - -/// Generate a 16 bit random number -LIB8STATIC uint16_t random16(void) -{ - rand16seed = (rand16seed * FASTLED_RAND16_2053) + FASTLED_RAND16_13849; - return rand16seed; -} - -/// Generate an 8-bit random number between 0 and lim -/// @param lim the upper bound for the result -LIB8STATIC uint8_t random8_max(uint8_t lim) -{ - uint8_t r = random8(); - r = (r*lim) >> 8; - return r; -} - -/// Generate an 8-bit random number in the given range -/// @param min the lower bound for the random number -/// @param lim the upper bound for the random number -LIB8STATIC uint8_t random8_min_max(uint8_t min, uint8_t lim) -{ - uint8_t delta = lim - min; - uint8_t r = random8_max(delta) + min; - return r; -} - -/// Generate an 16-bit random number between 0 and lim -/// @param lim the upper bound for the result -LIB8STATIC uint16_t random16_max(uint16_t lim) -{ - uint16_t r = random16(); - uint32_t p = (uint32_t)lim * (uint32_t)r; - r = p >> 16; - return r; -} - -/// Generate an 16-bit random number in the given range -/// @param min the lower bound for the random number -/// @param lim the upper bound for the random number -LIB8STATIC uint16_t random16_min_max( uint16_t min, uint16_t lim) -{ - uint16_t delta = lim - min; - uint16_t r = random16_max(delta) + min; - return r; -} - -/// Set the 16-bit seed used for the random number generator -LIB8STATIC void random16_set_seed(uint16_t seed) -{ - rand16seed = seed; -} - -/// Get the current seed value for the random number generator -LIB8STATIC uint16_t random16_get_seed(void) -{ - return rand16seed; -} - -/// Add entropy into the random number generator -LIB8STATIC void random16_add_entropy(uint16_t entropy) -{ - rand16seed += entropy; -} - -///@} - -#endif |