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#ifndef _BUFFER_H____
#define _BUFFER_H____
typedef struct buffer {
char *x;
long long p;
long long n;
int fd;
long long (*op)(int, void *, long long);
} buffer;
#define BUFFER_INSIZE 8192
#define BUFFER_OUTSIZE 8192
/* init */
extern void buffer_init(buffer *, long long (*)(int, void *, long long), int,
void *, long long);
#define buffer_INIT(op, fd, buf, len) \
{ (buf), 0, (len), (fd), (op) }
/* write */
extern long long buffer_write(int, void *, long long);
extern int buffer_flush(buffer *);
extern int buffer_put(buffer *, const void *, long long);
extern int buffer_puts(buffer *, const char *);
extern int buffer_putflush(buffer *, const void *, long long);
extern int buffer_putsflush(buffer *, const char *);
#define buffer_PUTC(s, c) \
(((s)->n != (s)->p) ? ((s)->x[(s)->p++] = (c), 0) \
: buffer_put((s), &(c), 1))
/* read */
extern long long buffer_read(int, void *, long long);
extern long long buffer_get(buffer *, void *, long long);
#define buffer_PEEK(s) ((s)->x + (s)->n)
#define buffer_SEEK(s, len) (((s)->p -= (len)), ((s)->n += (len)))
#define buffer_GETC(s, ch) \
(((s)->p > 0) ? (*(ch) = (s)->x[(s)->n], buffer_SEEK((s), 1), 1) \
: buffer_get((s), (ch), 1))
/* copy */
extern int buffer_copy(buffer *, buffer *);
#endif
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