1. Си / Говнокод #25171

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    #include <stdio.h>
#include <inttypes.h>
#include <stddef.h>

void printuint64(const uint64_t state);
uint64_t game_of_life8x8(const uint64_t old);
uint8_t getbit(uint64_t in, uint8_t y, uint8_t x);

uint8_t getbit(uint64_t in, uint8_t y, uint8_t x)
{
  return !!((in) & (1ULL << ((y&0b111) + (x&0b111)*8)) );
}

uint64_t setbit(uint8_t y, uint8_t x, uint8_t bit)
{
  if (bit)
  {
    return 1ULL << ((y&0b111) + (x&0b111)*8);
  }
  return 0;
}

uint64_t game_of_life8x8(const uint64_t old)
{
  uint64_t new_state = 0;
  #define GETBIT(y,x,val) getbit(val, y, x)
  #define SETBIT(y,x,bit) setbit(y,x,bit)
  
  #define SUMAROUND(y,x,val) ( \
    GETBIT(y+1,x,val) + GETBIT(y-1,x,val) \
  + GETBIT(y,x+1,val) + GETBIT(y,x-1,val) \
  + GETBIT(y+1,x+1,val) + GETBIT(y+1,x-1,val) \
  + GETBIT(y-1,x+1,val) + GETBIT(y-1,x-1,val) \
  )

  #define CELLSTATE(y,x,val) \
  (GETBIT(y,x,old) == 1 ? \
    ( ((SUMAROUND(y,x,val) == 2 ) || ( SUMAROUND(y,x,val) == 3 )) ? 1 : 0) \
    : \
    ( ( SUMAROUND(y,x,val) == 3 ) ? 1 : 0 ) \
  )

  #define SETCELL_SH(y,x,val) SETBIT(y,x,CELLSTATE(y,x,val))

  #define FILL_LINE(y) \
    SETCELL_SH(y,7,old) | SETCELL_SH(y,6,old) | SETCELL_SH(y,5,old) | \
    SETCELL_SH(y,4,old) | SETCELL_SH(y,3,old) | SETCELL_SH(y,2,old) | \
    SETCELL_SH(y,1,old) | SETCELL_SH(y,0,old)

  new_state = FILL_LINE(7) | FILL_LINE(6) | FILL_LINE(5)
  |  FILL_LINE(4) | FILL_LINE(3) | FILL_LINE(2)
  |  FILL_LINE(1) | FILL_LINE(0);

  return new_state;
}

void printuint64(const uint64_t state)
{
  for (size_t i = 7; i != SIZE_MAX; i--)
  {
    for (size_t j = 7; j != SIZE_MAX; j--)
    {
      printf("%u", !!((state >> (j+i*8)) & 1) );
    }
    printf("\n");
  }
}

int main(void)
{
  // Glider
  uint64_t state =
  (( 0b01000000ULL ) << 8*7 ) |
  (( 0b00100000ULL ) << 8*6 ) |
  (( 0b11100000ULL ) << 8*5 ) |
  (( 0b00000000ULL ) << 8*4 ) |
  (( 0b00000000ULL ) << 8*3 ) |
  (( 0b00000000ULL ) << 8*2 ) |
  (( 0b00000000ULL ) << 8*1 ) |
  (( 0b00000000ULL ) << 8*0 );

  
  for (size_t i = 0; i < 50; i++)
  {
    printuint64(state);
    state = game_of_life8x8(state);
    printf("\n");
  }
  return 0;
}

    Conway's game of life внутри uint64_t (8 на 8) с периодическими граничными условиями.

    Запостил: j123123, 09 Декабря 2018

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