#include <stdint.h>

#define N 16

#define MASK ((1 << (N - 1)) + (1 << (N - 1)) - 1)

#define LOW(x) ((unsigned)(x) & MASK)

#define HIGH(x) LOW((x) >> N)

#define MUL(x, y, z) { int32_t l = (long)(x) * (long)(y); \

(z)[0] = LOW(l); (z)[1] = HIGH(l); }

#define CARRY(x, y) ((int32_t)(x) + (long)(y) > MASK)

#define ADDEQU(x, y, z) (z = CARRY(x, (y)), x = LOW(x + (y)))

#define X0 0x330E

#define X1 0xABCD

#define X2 0x1234

#define A0 0xE66D

#define A1 0xDEEC

#define A2 0x5

#define C 0xB

#define SET3(x, x0, x1, x2) ((x)[0] = (x0), (x)[1] = (x1), (x)[2] = (x2))

#define SETLOW(x, y, n) SET3(x, LOW((y)[n]), LOW((y)[(n)+1]), LOW((y)[(n)+2]))

#define SEED(x0, x1, x2) (SET3(x, x0, x1, x2), SET3(a, A0, A1, A2), c = C)

#define REST(v) for (i = 0; i < 3; i++) { xsubi[i] = x[i]; x[i] = temp[i]; } \

return (v);

#define HI_BIT (1L << (2 * N - 1))

static uint32_t x[3] = { X0, X1, X2 }, a[3] = { A0, A1, A2 }, c = C;

static void next();

int32_t redisLrand48() {

next();

return (((int32_t)x[2] << (N - 1)) + (x[1] >> 1));

}

void redisSrand48(int32_t seedval) {

SEED(X0, LOW(seedval), HIGH(seedval));

}

static void next() {

uint32_t p[2], q[2], r[2], carry0, carry1;

MUL(a[0], x[0], p);

ADDEQU(p[0], c, carry0);

ADDEQU(p[1], carry0, carry1);

MUL(a[0], x[1], q);

ADDEQU(p[1], q[0], carry0);

MUL(a[1], x[0], r);

x[2] = LOW(carry0 + carry1 + CARRY(p[1], r[0]) + q[1] + r[1] +

a[0] * x[2] + a[1] * x[1] + a[2] * x[0]);

x[1] = LOW(p[1] + r[0]);

x[0] = LOW(p[0]);

}