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timerix
2023-02-11 12:19:05 +06:00
parent 609dfcf3ed
commit 305854e721
77 changed files with 565 additions and 562 deletions
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18
src/random/krandom.h
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@@ -12,8 +12,8 @@ extern "C" {
/*
You can choose any algorithm that has required functions:
some_alg32_statePtr some_alg32_init(uint32 seed);
uint32 some_alg32_next(some_alg32_statePtr);
some_alg32_statePtr some_alg32_init(u32 seed);
u32 some_alg32_next(some_alg32_statePtr);
void some_alg32_free(some_alg32_statePtr);
#define KRAND_ALG32_init some_alg32_init
@@ -51,19 +51,19 @@ typedef void* krand_statePtr;
#define __krand_next_definition(VALUE_SIZE) { return from+KRAND_ALG##VALUE_SIZE##_next(state)%(to-from); }
// ready-to-use functions
static inline int8 krand_next8 (krand_statePtr state, int8 from, int8 to) __krand_next_definition(32)
static inline int16 krand_next16(krand_statePtr state, int16 from, int16 to) __krand_next_definition(32)
static inline int32 krand_next32(krand_statePtr state, int32 from, int32 to) __krand_next_definition(32)
static inline int64 krand_next64(krand_statePtr state, int64 from, int64 to) __krand_next_definition(64)
static inline i8 krand_next8 (krand_statePtr state, i8 from, i8 to) __krand_next_definition(32)
static inline i16 krand_next16(krand_statePtr state, i16 from, i16 to) __krand_next_definition(32)
static inline i32 krand_next32(krand_statePtr state, i32 from, i32 to) __krand_next_definition(32)
static inline i64 krand_next64(krand_statePtr state, i64 from, i64 to) __krand_next_definition(64)
// divides random number by 2^64 to return a value between 0 and 1
static inline float32 krand_nextFloat32(krand_statePtr state) {return (uint32)KRAND_ALG32_next(state)/0xffffffff; }
static inline float64 krand_nextFloat64(krand_statePtr state) {return KRAND_ALG64_next(state)/0xffffffff; }
static inline f32 krand_nextFloat32(krand_statePtr state) {return (u32)KRAND_ALG32_next(state)/0xffffffff; }
static inline f64 krand_nextFloat64(krand_statePtr state) {return KRAND_ALG64_next(state)/0xffffffff; }
///@param chance (0-1.0) is probability of success
static inline bool fate(krand_statePtr state,float chance){
int limit=1/chance + 0.01f;
i32 limit=1/chance + 0.01f;
return KRAND_ALG32_next(state)%limit == 0;
}