libevent学习笔记1：一个用libevent实现的回显服务器

#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#define MAX_LINE 16384

char rot13_char(char c)
{
	if((c>='a'&&c<='m')||(c>='A'&&c<='M'))
		return c+13;
	if((c>='n'&&c<='z')||(c>='N'&&c<='Z'))
			return c-13;
	else
		return c;
}
 void readcb(struct bufferevent* bev,void* ctx)
 {
	 struct evbuffer *input,*output;
	 char* line;
	 size_t n;
	 int i;
	 input =bufferevent_get_input(bev);
	 output=bufferevent_get_output(bev);
	 while(line=evbuffer_readln(input,&n,EVBUFFER_EOL_LF))
	 {
		 for(i=0;i=MAX_LINE)
	 {
		 char buf[1024];
		 while(evbuffer_get_length(input))
		 {
			 int n=evbuffer_remove(input,buf,sizeof(buf));
			 for(i=0;iFD_SETSIZE)
	 {
		 close(fd);
	 }
	 else
	 {
		 struct bufferevent* bev;
		 evutil_make_socket_nonblocking(fd);
		 bev=bufferevent_socket_new(base,fd,BEV_OPT_CLOSE_ON_FREE);
		 bufferevent_setcb(bev,readcb,NULL,errorcb,NULL);
		 bufferevent_setwatermark(bev,EV_READ,0,MAX_LINE);
		 bufferevent_enable(bev,EV_READ|EV_WRITE);
	 }
 }

 void run(void)
 {
	 evutil_socket_t listener;
	 struct sockaddr_in sin;
	 struct event_base* base;
	 struct event* listener_event;
	 base=event_base_new();
	 if(!base)
		 return;
	 sin.sin_family=AF_INET;
	 sin.sin_addr.s_addr=0;
	 sin.sin_port=htons(8888);
	 listener=socket(AF_INET,SOCK_STREAM,0);
	 evutil_make_socket_nonblocking(listener);
	 if(bind(listener,(struct sockaddr*)&sin,sizeof(sin))<0)
	 {
		 perror("bind");
		 return;
	 }
	 if(listen(listener,16)<0)
	 {
		 perror("listen");
		 return;
	 }
	 listener_event=event_new(base,listener,EV_READ|EV_PERSIST,do_accept,(void*)base);
	 event_add(listener_event,NULL);
	 event_base_dispatch(base);
 }
 int main(int argc,char* argv[])
 {
	 setvbuf(stdout,NULL,_IONBF,0);
	 run();
	 return 0;
 }