393 lines
8.1 KiB
C
393 lines
8.1 KiB
C
/*
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============================================================================
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Name : 2048.c
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Author : Maurits van der Schee
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Description : Console version of the game "2048" for GNU/Linux
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============================================================================
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*/
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#define _XOPEN_SOURCE 500
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <termios.h>
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#include <stdbool.h>
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#include <stdint.h>
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#include <time.h>
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#include <signal.h>
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#define SIZE 4
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uint32_t score=0;
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void getColor(uint16_t value, char *color, size_t length) {
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uint8_t original[] = {8,255,1,255,2,255,3,255,4,255,5,255,6,255,7,255,9,0,10,0,11,0,12,0,13,0,14,0,255,0,255,0};
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uint8_t blackwhite[] = {232,255,234,255,236,255,238,255,240,255,242,255,244,255,246,0,248,0,249,0,250,0,251,0,252,0,253,0,254,0,255,0};
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uint8_t bluered[] = {235,255,63,255,57,255,93,255,129,255,165,255,201,255,200,255,199,255,198,255,197,255,196,255,196,255,196,255,196,255,196,255};
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uint8_t *scheme = original;
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uint8_t *background = scheme+0;
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uint8_t *foreground = scheme+1;
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if (value > 0) while (value >>= 1) {
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if (background+2<scheme+sizeof(original)) {
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background+=2;
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foreground+=2;
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}
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}
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snprintf(color,length,"\033[38;5;%d;48;5;%dm",*foreground,*background);
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}
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void drawBoard(uint16_t board[SIZE][SIZE]) {
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int8_t x,y;
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char color[40], reset[] = "\033[m";
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printf("\033[H");
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printf("2048.c %17d pts\n\n",score);
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for (y=0;y<SIZE;y++) {
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for (x=0;x<SIZE;x++) {
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getColor(board[x][y],color,40);
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printf("%s",color);
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printf(" ");
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printf("%s",reset);
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}
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printf("\n");
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for (x=0;x<SIZE;x++) {
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getColor(board[x][y],color,40);
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printf("%s",color);
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if (board[x][y]!=0) {
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char s[8];
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snprintf(s,8,"%u",board[x][y]);
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int8_t t = 7-strlen(s);
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printf("%*s%s%*s",t-t/2,"",s,t/2,"");
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} else {
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printf(" · ");
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}
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printf("%s",reset);
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}
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printf("\n");
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for (x=0;x<SIZE;x++) {
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getColor(board[x][y],color,40);
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printf("%s",color);
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printf(" ");
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printf("%s",reset);
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}
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printf("\n");
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}
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printf("\n");
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printf(" ←,↑,→,↓ or q \n");
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printf("\033[A");
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}
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int8_t findTarget(uint16_t array[SIZE],int8_t x,int8_t stop) {
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int8_t t;
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// if the position is already on the first, don't evaluate
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if (x==0) {
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return x;
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}
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for(t=x-1;t>=0;t--) {
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if (array[t]!=0) {
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if (array[t]!=array[x]) {
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// merge is not possible, take next position
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return t+1;
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}
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return t;
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} else {
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// we should not slide further, return this one
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if (t==stop) {
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return t;
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}
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}
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}
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// we did not find a
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return x;
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}
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bool slideArray(uint16_t array[SIZE]) {
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bool success = false;
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int8_t x,t,stop=0;
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for (x=0;x<SIZE;x++) {
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if (array[x]!=0) {
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t = findTarget(array,x,stop);
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// if target is not original position, then move or merge
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if (t!=x) {
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// if target is not zero, set stop to avoid double merge
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if (array[t]!=0) {
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score+=array[t]+array[x];
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stop = t+1;
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}
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array[t]+=array[x];
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array[x]=0;
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success = true;
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}
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}
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}
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return success;
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}
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void rotateBoard(uint16_t board[SIZE][SIZE]) {
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int8_t i,j,n=SIZE;
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uint16_t tmp;
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for (i=0; i<n/2; i++){
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for (j=i; j<n-i-1; j++){
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tmp = board[i][j];
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board[i][j] = board[j][n-i-1];
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board[j][n-i-1] = board[n-i-1][n-j-1];
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board[n-i-1][n-j-1] = board[n-j-1][i];
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board[n-j-1][i] = tmp;
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}
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}
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}
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bool moveUp(uint16_t board[SIZE][SIZE]) {
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bool success = false;
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int8_t x;
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for (x=0;x<SIZE;x++) {
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success |= slideArray(board[x]);
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}
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return success;
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}
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bool moveLeft(uint16_t board[SIZE][SIZE]) {
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bool success;
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rotateBoard(board);
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success = moveUp(board);
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rotateBoard(board);
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rotateBoard(board);
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rotateBoard(board);
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return success;
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}
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bool moveDown(uint16_t board[SIZE][SIZE]) {
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bool success;
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rotateBoard(board);
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rotateBoard(board);
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success = moveUp(board);
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rotateBoard(board);
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rotateBoard(board);
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return success;
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}
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bool moveRight(uint16_t board[SIZE][SIZE]) {
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bool success;
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rotateBoard(board);
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rotateBoard(board);
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rotateBoard(board);
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success = moveUp(board);
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rotateBoard(board);
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return success;
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}
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bool findPairDown(uint16_t board[SIZE][SIZE]) {
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bool success = false;
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int8_t x,y;
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for (x=0;x<SIZE;x++) {
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for (y=0;y<SIZE-1;y++) {
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if (board[x][y]==board[x][y+1]) return true;
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}
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}
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return success;
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}
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int16_t countEmpty(uint16_t board[SIZE][SIZE]) {
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int8_t x,y;
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int16_t count=0;
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for (x=0;x<SIZE;x++) {
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for (y=0;y<SIZE;y++) {
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if (board[x][y]==0) {
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count++;
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}
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}
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}
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return count;
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}
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bool gameEnded(uint16_t board[SIZE][SIZE]) {
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bool ended = true;
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if (countEmpty(board)>0) return false;
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if (findPairDown(board)) return false;
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rotateBoard(board);
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if (findPairDown(board)) ended = false;
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rotateBoard(board);
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rotateBoard(board);
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rotateBoard(board);
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return ended;
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}
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void addRandom(uint16_t board[SIZE][SIZE]) {
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static bool initialized = false;
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int8_t x,y;
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int16_t r,len=0;
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uint16_t n,list[SIZE*SIZE][2];
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if (!initialized) {
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srand(time(NULL));
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initialized = true;
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}
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for (x=0;x<SIZE;x++) {
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for (y=0;y<SIZE;y++) {
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if (board[x][y]==0) {
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list[len][0]=x;
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list[len][1]=y;
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len++;
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}
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}
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}
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if (len>0) {
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r = rand()%len;
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x = list[r][0];
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y = list[r][1];
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n = ((rand()%10)/9+1)*2;
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board[x][y]=n;
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}
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}
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void setBufferedInput(bool enable) {
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static bool enabled = true;
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static struct termios old;
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struct termios new;
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if (enable && !enabled) {
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// restore the former settings
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tcsetattr(STDIN_FILENO,TCSANOW,&old);
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// set the new state
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enabled = true;
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} else if (!enable && enabled) {
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// get the terminal settings for standard input
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tcgetattr(STDIN_FILENO,&new);
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// we want to keep the old setting to restore them at the end
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old = new;
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// disable canonical mode (buffered i/o) and local echo
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new.c_lflag &=(~ICANON & ~ECHO);
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// set the new settings immediately
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tcsetattr(STDIN_FILENO,TCSANOW,&new);
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// set the new state
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enabled = false;
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}
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}
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int test() {
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uint16_t array[SIZE];
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uint16_t data[] = {
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0,0,0,2, 2,0,0,0,
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0,0,2,2, 4,0,0,0,
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0,2,0,2, 4,0,0,0,
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2,0,0,2, 4,0,0,0,
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2,0,2,0, 4,0,0,0,
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2,2,2,0, 4,2,0,0,
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2,0,2,2, 4,2,0,0,
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2,2,0,2, 4,2,0,0,
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2,2,2,2, 4,4,0,0,
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4,4,2,2, 8,4,0,0,
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2,2,4,4, 4,8,0,0,
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8,0,2,2, 8,4,0,0,
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4,0,2,2, 4,4,0,0
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};
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uint16_t *in,*out;
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uint16_t t,tests;
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uint8_t i;
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bool success = true;
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tests = (sizeof(data)/sizeof(data[0]))/(2*SIZE);
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for (t=0;t<tests;t++) {
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in = data+t*2*SIZE;
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out = in + SIZE;
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for (i=0;i<SIZE;i++) {
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array[i] = in[i];
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}
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slideArray(array);
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for (i=0;i<SIZE;i++) {
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if (array[i] != out[i]) {
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success = false;
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}
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}
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if (success==false) {
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for (i=0;i<SIZE;i++) {
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printf("%d ",in[i]);
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}
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printf("=> ");
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for (i=0;i<SIZE;i++) {
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printf("%d ",array[i]);
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}
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printf("expected ");
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for (i=0;i<SIZE;i++) {
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printf("%d ",in[i]);
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}
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printf("=> ");
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for (i=0;i<SIZE;i++) {
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printf("%d ",out[i]);
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}
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printf("\n");
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break;
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}
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}
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if (success) {
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printf("All %u tests executed successfully\n",tests);
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}
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return !success;
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}
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void signal_callback_handler(int signum) {
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printf(" TERMINATED \n");
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setBufferedInput(true);
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printf("\033[?25h");
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exit(signum);
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}
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int main(int argc, char *argv[]) {
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uint16_t board[SIZE][SIZE];
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char c;
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bool success;
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if (argc == 2 && strcmp(argv[1],"test")==0) {
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return test();
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}
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printf("\033[?25l\033[2J\033[H");
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// register signal handler for when ctrl-c is pressed
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signal(SIGINT, signal_callback_handler);
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memset(board,0,sizeof(board));
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addRandom(board);
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addRandom(board);
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drawBoard(board);
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setBufferedInput(false);
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while (true) {
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c=getchar();
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switch(c) {
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case 68: // left arrow
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success = moveLeft(board); break;
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case 67: // right arrow
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success = moveRight(board); break;
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case 65: // up arrow
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success = moveUp(board); break;
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case 66: // down arrow
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success = moveDown(board); break;
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default: success = false;
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}
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if (success) {
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drawBoard(board);
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usleep(150000);
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addRandom(board);
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drawBoard(board);
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if (gameEnded(board)) {
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printf(" GAME OVER \n");
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break;
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}
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}
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if (c=='q') {
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printf(" QUIT \n");
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break;
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}
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}
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setBufferedInput(true);
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printf("\033[?25h");
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return EXIT_SUCCESS;
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}
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