/* some interesting bits from /usr/include/stdio.h */

typedef unsigned int	size_t;
#define	NULL	0
#define	BUFSIZ	1024
#define	_NFILE	20	/* initial number of streams: SPARC ABI and default */
#define	_IOFBF		0000	/* full buffered */
#define	_IOLBF		0100	/* line buffered */
#define	_IONBF		0004	/* not buffered */
#define	_IOEOF		0020	/* EOF reached on read */
#define	_IOERR		0040	/* I/O error from system */
#define	_IOREAD		0001	/* currently reading */
#define	_IOWRT		0002	/* currently writing */
#define	_IORW		0200	/* opened for reading and writing */
#define	_IOMYBUF	0010	/* stdio malloc()'d buffer */
#define	EOF	(-1)
#define	stdin	(&__iob[0])
#define	stdout	(&__iob[1])
#define	stderr	(&__iob[2])

typedef struct
{
	int		_cnt;	/* number of available characters in buffer */
	unsigned char	*_ptr;	/* next character from/to here in buffer */
	unsigned char	*_base;	/* the buffer */
	unsigned char	_flag;	/* the state of the stream */
	unsigned char	_file;	/* UNIX System file descriptor */
} FILE;
extern FILE		__iob[_NFILE];

extern int	fprintf(FILE *, const char *, ...);
extern int	vfprintf(FILE *, const char *, va_list);
extern int	fgetc(FILE *);
extern int	getc(FILE *);
extern int	getchar(void);
extern int	__filbuf(FILE *);

/* when the code does not have to be reentrant then getc(), ...
   become macros, not function calls
*/
#ifndef	_REENTRANT

#define	getc(p)		(--(p)->_cnt < 0 ? __filbuf(p) : (int)*(p)->_ptr++)
#define	putc(x, p)	(--(p)->_cnt < 0 ? __flsbuf((unsigned char) (x), (p)) \
				: (int)(*(p)->_ptr++ = (x)))
#define	getchar()	getc(stdin)
#define	putchar(x)	putc((x), stdout)
#define	clearerr(p)	((void)((p)->_flag &= ~(_IOERR | _IOEOF)))
#define	feof(p)		((p)->_flag & _IOEOF)
#define	ferror(p)	((p)->_flag & _IOERR)

#endif	/* _REENTRANT */