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#ifndef BUFFER_H
#define BUFFER_H
#include <sys/types.h>
struct buffer {
char *addr;
char *begin;
char *end;
int size;
};
void binit(struct buffer *b, size_t size);
void bfree(struct buffer *b);
int bread(struct buffer *b, int fd);
int bwrite(struct buffer *b, int fd);
int bcanfill(struct buffer *b);
int bhasdata(struct buffer *b);
int bgets(struct buffer *b, char *s, size_t len);
int bputs(struct buffer *b, char *s, size_t len);
#endif
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