/* $begin common.h */
#ifndef __COMMON_H__
#define __COMMON_H__

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <setjmp.h>
#include <signal.h>
#include <ctype.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <errno.h>
#include <math.h>
#include <pthread.h>
#include <semaphore.h>
#include <sys/socket.h>
#include <netdb.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <limits.h>
#include <sys/epoll.h>
#include <sys/timerfd.h>

/* Default file permissions */
#define DEF_MODE   S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH
#define DEF_UMASK  S_IWGRP|S_IWOTH

/* Simplifies calls to bind(), connect(), and accept() */
typedef struct sockaddr SA;

/* Persistent state for the robust I/O (Rio) package */
#define RIO_BUFSIZE 8192
typedef struct {
    int rio_fd;
    int rio_cnt;
    char *rio_bufptr;
    char rio_buf[RIO_BUFSIZE];
} rio_t;

/* External variables */
extern int h_errno;
extern char **environ;

/* Misc constants */
#define	MAXLINE	 8192
#define MAXBUF   8192
#define LISTENQ  1024

/* Rio (Robust I/O) package */
ssize_t rio_readn(int fd, void *usrbuf, size_t n);
ssize_t rio_writen(int fd, void *usrbuf, size_t n);
void rio_readinitb(rio_t *rp, int fd);
ssize_t	rio_readnb(rio_t *rp, void *usrbuf, size_t n);
ssize_t	rio_readlineb(rio_t *rp, void *usrbuf, size_t maxlen);

/* Client/server helper functions */
int open_client_sock(char *hostname, int portno);
int open_listen_sock(int portno);

#endif /* __COMMON_H__ */