buffer.h

使用select实现的UNIX/Linux环境下的TCP聊天程序

#ifndef _BUFFER_H_
#define _BUFFER_H_

typedef struct buffer
{
  char *p;			// point to buffer
  unsigned long size;		// size
  unsigned long length;		// payload length
  unsigned long maxsize;	//
} buffer_t;

buffer_t *buffer_create(unsigned long size, unsigned long maxsize);
void buffer_destroy(buffer_t * buf);
int buffer_resize(buffer_t * buf, int newsize);
int buffer_append_data(buffer_t * buf, char *data, unsigned long length);
char *buffer_fetch_data(buffer_t * buf, unsigned long length, unsigned long *rlength);
int buffer_remove_data(buffer_t * buf, unsigned long length);

#endif