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/*

 * pANS stdio.h

 */

/*

 * According to X3J11, there is only one i/o buffer

 * and it must not be occupied by both input and output data.

 *	If rp<wp, we must have state==RD and

 *	if wp<rp, we must have state==WR, so that getc and putc work correctly.

 *	On open, rp, wp and buf are set to 0, so first getc or putc will call _IO_getc

 *	or _IO_putc, which will allocate the buffer.

 *	If setvbuf(., ., _IONBF, .) is called, bufl is set to 0 and

 *	buf, rp and wp are pointed at unbuf.

 *	If setvbuf(., ., _IOLBF, .) is called, _IO_putc leaves wp and rp pointed at the

 *	end of the buffer so that it can be called on each putc to check whether it's got

 *	a newline.  This nonsense is in order to avoid impacting performance of the other

 *	buffering modes more than necessary -- putting the test in putc adds many

 *	instructions that are wasted in non-_IOLBF mode:

 *	#define putc(c, f)	(_IO_ctmp=(c),\

 *				(f)->wp>=(f)->rp || (f)->flags&LINEBUF && _IO_ctmp=='\n'\

 *					?_IO_putc(_IO_ctmp, f)\

 *					:*(f)->wp++=_IO_ctmp)

 *				

 */

typedef struct{

	int fd;		/* UNIX file pointer */

	char flags;	/* bits for must free buffer on close, line-buffered */

	char state;	/* last operation was read, write, position, error, eof */

	char *buf;	/* pointer to i/o buffer */

	char *rp;	/* read pointer (or write end-of-buffer) */

	char *wp;	/* write pointer (or read end-of-buffer) */

	char *lp;	/* actual write pointer used when line-buffering */

	long bufl;	/* actual length of buffer */

	char unbuf[1];	/* tiny buffer for unbuffered io (used for ungetc?) */

}FILE;

typedef long fpos_t;

#ifndef NULL

#define	NULL	0

#endif

/*

 * Third arg of setvbuf

 */

#define	_IOFBF	1			/* block-buffered */

#define	_IOLBF	2			/* line-buffered */

#define	_IONBF	3			/* unbuffered */

#define	BUFSIZ	4096			/* size of setbuf buffer */

#define	EOF	(-1)			/* returned on end of file */

#define	FOPEN_MAX	128		/* max files open */

#define	FILENAME_MAX	BUFSIZ		/* silly filename length */

#define	L_tmpnam	20		/* sizeof "/tmp/abcdefghij9999 */

#define	SEEK_CUR	1

#define	SEEK_END	2

#define	SEEK_SET	0

#define	TMP_MAX		64		/* very hard to set correctly */

#define	stderr	(&_IO_stream[2])

#define	stdin	(&_IO_stream[0])

#define	stdout	(&_IO_stream[1])

#define	_IO_CHMASK	0377		/* mask for 8 bit characters */

FILE *tmpfile(void);

char *tmpnam(char *);

int fclose(FILE *);

int fflush(FILE *);

FILE *fopen(const char *, const char *);

FILE *freopen(const char *, const char *, FILE *);

void setbuf(FILE *, char *);

int setvbuf(FILE *, char *, int, long);

int fprintf(FILE *, const char *, ...);

int fscanf(FILE *, const char *, ...);

int printf(const char *, ...);

int scanf(const char *, ...);

int sprintf(char *, const char *, ...);

int sscanf(const char *, const char *, ...);

int vfprintf(FILE *, const char *, va_list);

int vprintf(const char *, va_list);

int vsprintf(char *, const char *, va_list);

int vfscanf(FILE *, const char *, va_list);

int fgetc(FILE *);

char *fgets(char *, int, FILE *);

int fputc(int, FILE *);

int fputs(const char *, FILE *);

int getc(FILE *);

#define	getc(f)	((f)->rp>=(f)->wp?_IO_getc(f):*(f)->rp++&_IO_CHMASK)

int _IO_getc(FILE *f);

int getchar(void);

#define	getchar()	getc(stdin)

char *gets(char *);

int putc(int, FILE *);

#define	putc(c, f) ((f)->wp>=(f)->rp?_IO_putc(c, f):(*(f)->wp++=c)&_IO_CHMASK)

int _IO_putc(int, FILE *);

int putchar(int);

#define	putchar(c)	putc(c, stdout)

int puts(const char *);

int ungetc(int, FILE *);

long fread(void *, long, long, FILE *);

long fwrite(const void *, long, long, FILE *);

int fgetpos(FILE *, fpos_t *);

int fseek(FILE *, long int, int);

int fsetpos(FILE *, const fpos_t *);

long int ftell(FILE *);

void rewind(FILE *);

void clearerr(FILE *);

int feof(FILE *);

int ferror(FILE *);

void perror(const char *);

extern FILE _IO_stream[FOPEN_MAX];

FILE *sopenr(const char *);

FILE *sopenw(void);

char *sclose(FILE *);

char	*dtoa(double, int, int, int*, int*, char**);

void	freedtoa(char*);