Stuff

/* * Read a stream socket one line at a time, and write each line back * to the sender. * * Return when the connection is terminated. */#include	<stdio.h>#include	"common.h"#include	"logic.h"#include    "network.h"#define		MAXSIZE	512char **board2buf(int board[SIZE][SIZE]){  char **buf = malloc(SIZE * sizeof(char *));  for (int i = 0; i < SIZE; i++)    buf[i] = malloc((SIZE + 2) * sizeof(char));  for(int i = 0; i < SIZE; i++)  {    for (int j = 0; j < SIZE; j++)    {      // Coordinates alternation      buf[i][j] = board[j][i] + '0';    }    buf[i][SIZE] = '\n';    buf[i][SIZE+1] = '\0';  }  return buf;}void senddata(int sockfd, int code, char **buf){  char	out[MAXSIZE];  int	n;  if (code == rp_ok)  {    sprintf(out, "1\n");    for (int i = 0; i < SIZE; i++)    {      strcat(out, buf[i]);    }  }  else  {    sprintf(out, "0\n");  }  fprintf(stderr, "Sending: %s", out);  n = strlen(out);  if (writen(sockfd, out, n) != n)    fprintf(stderr, "str_echo: writen error\n");}str_echo(int sockfd){  int	wait = 0;  int	n;  int	res;  int last = 2;  int	x, y, c;  char line[MAXSIZE];  for ( ; ; ) {    n = readline(sockfd, line, MAXSIZE);    if (n == 0)    {      fprintf(stderr, "Connection terminated\n");      return;		/* connection terminated */    }    else if (n < 0)      fprintf(stderr, "str_echo: readline error\n");    fprintf(stderr, "Received: %s", line);    if (!wait)    {      if (line[0] == '0')      {        res = init();      }      else if (line[0] == '1')      {        res = 0;        wait = 1;      }      if (res)      {        last = c;        senddata(sockfd, rp_ok, board2buf(board));      }      else      {        senddata(sockfd, rp_error, NULL);      }    }    else    {      sscanf(line, "%d,%d,%d", &x, &y, &c);      if (c == last)      {        senddata(sockfd, rp_error, NULL);      }      else      {        res = place(x, y, c);        if (res)        {          last = c;          senddata(sockfd, rp_ok, board2buf(board));        }        else        {          senddata(sockfd, rp_error, NULL);        }      }      wait = 0;    }  }}