|
|
|
Liboil Reference Manual | |
|---|
Random Number GenerationRandom Number Generation — Random number generation |
#define oil_rand_s32 () #define oil_rand_s32_l31 () #define oil_rand_s16 () #define oil_rand_s16_l15 () #define oil_rand_s16_l9 () #define oil_rand_s16_l8 () #define oil_rand_s16_l4 () #define oil_rand_s8 () #define oil_rand_u32 () #define oil_rand_u32_l31 () #define oil_rand_u16 () #define oil_rand_u8 () #define oil_rand_f64_0_1 () #define oil_rand_f64_s32 () #define oil_rand_f64_s16 () #define oil_rand_f64_s8 () #define oil_rand_f64_u32 () #define oil_rand_f64_u16 () #define oil_rand_f64_u8 () #define oil_rand_f32_0_1 () #define oil_rand_f32_s32 () #define oil_rand_f32_s16 () #define oil_rand_f32_s8 () #define oil_rand_f32_u32 () #define oil_rand_f32_u16 () #define oil_rand_f32_u8 () #define oil_rand_s64 () #define oil_rand_u64 () #define oil_rand_rgba (a)
#define oil_rand_s32() ((rand()&0xffff)<<16 | (rand()&0xffff))
Evaluates to a random integer in the range [-(1<<31), (1<<31)-1].
#define oil_rand_s32_l31() (((int32_t)rand())-0x40000000)
Evaluates to a random integer in the range [-(1<<30), (1<<30)-1].
#define oil_rand_s16() ((int16_t)(rand()&0xffff))
Evaluates to a random integer in the range [-(1<<15), (1<<15)-1].
#define oil_rand_s16_l15() (oil_rand_s16()>>1)
Evaluates to a random integer in the range [-(1<<14), (1<<14)-1].
#define oil_rand_s16_l9() (oil_rand_s16()>>7)
Evaluates to a random integer in the range [-(1<<8), (1<<8)-1].
#define oil_rand_s16_l8() (oil_rand_s16()>>8)
Evaluates to a random integer in the range [-(1<<7), (1<<7)-1].
#define oil_rand_s16_l4() (oil_rand_s16()>>12)
Evaluates to a random integer in the range [-(1<<3), (1<<3)-1].
#define oil_rand_s8() ((int8_t)(rand()&0xffff))
Evaluates to a random integer in the range [-(1<<7), (1<<7)-1].
#define oil_rand_u32() ((uint32_t)((rand()&0xffff)<<16 | (rand()&0xffff)))
Evaluates to a random integer in the range [0, (1<<32)-1].
#define oil_rand_u32_l31() ((uint32_t)rand())
Evaluates to a random integer in the range [0, (1<<31)-1].
#define oil_rand_u16() ((uint16_t)(rand()&0xffff))
Evaluates to a random integer in the range [0, (1<<16)-1].
#define oil_rand_u8() ((uint8_t)(rand()&0xffff))
Evaluates to a random integer in the range [0, (1<<8)-1].
#define oil_rand_f64_0_1() (((rand()/(RAND_MAX+1.0))+rand())/(RAND_MAX+1.0))
Evaluates to a random double-precision floating point number in the range [0, 1.0).
#define oil_rand_f64_s32() (oil_rand_f64_0_1()*4294967296.0-2147483648.0)
Evaluates to a random double-precision floating point number in the range [-(1<<31), (1<<31)). Note that when rounded to the nearest integer, this exceeds the range of int32_t.
#define oil_rand_f64_s16() (oil_rand_f64_0_1()*65536.0-32768.0)
Evaluates to a random double-precision floating point number in the range [-(1<<15), (1<<15)). Note that when rounded to the nearest integer, this exceeds the range of int16_t.
#define oil_rand_f64_s8() (oil_rand_f64_0_1()*256.0-128.0)
Evaluates to a random double-precision floating point number in the range [-(1<<7), (1<<7)). Note that when rounded to the nearest integer, this exceeds the range of int8_t.
#define oil_rand_f64_u32() (oil_rand_f64_0_1()*4294967296.0)
Evaluates to a random double-precision floating point number in the range [0, (1<<32)). Note that when rounded to the nearest integer, this exceeds the range of uint32_t.
#define oil_rand_f64_u16() (oil_rand_f64_0_1()*65536.0)
Evaluates to a random double-precision floating point number in the range [0, (1<<16)). Note that when rounded to the nearest integer, this exceeds the range of uint16_t.
#define oil_rand_f64_u8() (oil_rand_f64_0_1()*256.0)
Evaluates to a random double-precision floating point number in the range [0, (1<<8)). Note that when rounded to the nearest integer, this exceeds the range of uint8_t.
#define oil_rand_f32_0_1() (rand()/(RAND_MAX+1.0))
Evaluates to a random single-precision floating point number in the range [0, 1.0).
#define oil_rand_f32_s32() (oil_rand_f64_0_1()*4294967296.0-2147483648.0)
Evaluates to a random double-precision floating point number in the range [-(1<<31), (1<<31)). Note that when rounded to the nearest integer, this exceeds the range of int32_t.
#define oil_rand_f32_s16() (oil_rand_f64_0_1()*65536.0-32768.0)
Evaluates to a random double-precision floating point number in the range [-(1<<15), (1<<15)). Note that when rounded to the nearest integer, this exceeds the range of int16_t.
#define oil_rand_f32_s8() (oil_rand_f64_0_1()*256.0-128.0)
Evaluates to a random double-precision floating point number in the range [-(1<<7), (1<<7)). Note that when rounded to the nearest integer, this exceeds the range of int8_t.
#define oil_rand_f32_u32() (oil_rand_f64_0_1()*4294967296.0)
Evaluates to a random double-precision floating point number in the range [0, (1<<32)). Note that when rounded to the nearest integer, this exceeds the range of uint32_t.
#define oil_rand_f32_u16() (oil_rand_f64_0_1()*65536.0)
Evaluates to a random double-precision floating point number in the range [0, (1<<16)). Note that when rounded to the nearest integer, this exceeds the range of uint16_t.
#define oil_rand_f32_u8() (oil_rand_f64_0_1()*256.0)
Evaluates to a random double-precision floating point number in the range [0, (1<<8)). Note that when rounded to the nearest integer, this exceeds the range of uint8_t.
#define oil_rand_s64() ((int64_t)(oil_rand_s32())<<32 | oil_rand_s32())
Evaluates to a random integer in the range [-(1<<63), (1<<63)-1].
#define oil_rand_u64() ((uint64_t)(oil_rand_u32())<<32 | oil_rand_u32())
Evaluates to a random integer in the range [0, (1<<64)-1].
| << OilPrototype | OilTest >> |