#define _POSIX_SOURCE
#include <stdlib.h>
#include <stdarg.h>
#include <errno.h>
#include <string.h>
#include "math.h"
#include <sys/types.h>
#include <fcntl.h>
#include <setjmp.h>
#include <float.h>

#define __LITTLE_ENDIAN
#define Storeinc(a,b,c) (*a++ = b << 16 | c & 0xffff)

#define	nil		((void*)0)

typedef unsigned char	uchar;
typedef signed char	schar;
typedef unsigned short	Rune;
typedef long long int	vlong;
typedef unsigned long long int	uvlong;
typedef unsigned long ulong;
typedef unsigned int uint;
typedef unsigned short ushort;

#define	USED(x)		if(x);else
#define	SET(x)

#define nelem(x)	(sizeof(x)/sizeof((x)[0]))

enum
{
	UTFmax		= 3,		/* maximum bytes per rune */
	Runesync	= 0x80,		/* cannot represent part of a UTF sequence (<) */
	Runeself	= 0x80,		/* rune and UTF sequences are the same (<) */
	Runeerror	= 0x80		/* decoding error in UTF */
};

/*
 * new rune routines
 */
extern	int	runetochar(char*, Rune*);
extern	int	chartorune(Rune*, char*);
extern	int	runelen(long);
extern	int	fullrune(char*, int);
extern	int	runestrlen(Rune*);

/*
 * rune routines from converted str routines
 */
extern	long	utflen(char*);
extern	char*	utfrune(char*, long);
extern	char*	utfrrune(char*, long);

enum
{
	NAMELEN	= 28,
	ERRLEN	= 64
};
#define CHDIR	0x80000000	/* mode bit for directories */
#define	MORDER	0x0003		/* mask for bits defining order of mounting */
#define	MREPL	0x0000		/* mount replaces object */
#define	MBEFORE	0x0001		/* mount goes before others in union directory */
#define	MAFTER	0x0002		/* mount goes after others in union directory */
#define	MCREATE	0x0004		/* permit creation in mounted directory */
#define	MMASK	0x0007		/* all bits on */
#define	OREAD	0		/* open for read */
#define	OWRITE	1		/* write */
#define	ORDWR	2		/* read and write */
#define	OEXEC	3		/* execute, == read but check execute permission */
#define	OTRUNC	16		/* or'ed in (except for exec), truncate file first */
#define	OCEXEC	32		/* or'ed in, close on exec */
#define	ORCLOSE	64		/* or'ed in, remove on close */
#define	DIRLEN	116
#define UMFILE	0		/* unbind the file from a union */
#define UMDIR	1		/* unmount the directory containing file from union */

typedef
struct Qid
{
	ulong	path;
	ulong	vers;
} Qid;

typedef
struct Dir
{
	char	name[NAMELEN];
	char	uid[NAMELEN];
	char	gid[NAMELEN];
	Qid	qid;
	ulong	mode;
	int	atime;
	int	mtime;
	ulong	length;
	ushort	type;
	ushort	dev;
} Dir;

int	dirfstat(int, Dir*);
int	dirstat(char*, Dir*);
int	dirfwstat(int, Dir*);
int	dirwstat(char*, Dir*);
void	exits(const char*);
void	_exits(const char*);
int	create(char*, int, int);

char*	getuser(void);

typedef struct Tm Tm;
struct Tm {
	int	sec;
	int	min;
	int	hour;
	int	mday;
	int	mon;
	int	year;
	int	wday;
	int	yday;
	char	zone[4];
};	

/*
 * print routines
 */
typedef	struct	Fconv	Fconv;
struct	Fconv
{
	char*	out;		/* pointer to next output */
	char*	eout;		/* pointer to end */
	int	f1;
	int	f2;
	int	f3;
	int	chr;
};
extern	char*	doprint(char*, char*, char*, va_list);
extern	int	print(char*, ...);
extern	int	snprint(char*, int, char*, ...);
extern	int	sprint(char*, char*, ...);
extern	int	fprint(int, char*, ...);
extern	char*	strdup(const char*);
extern	vlong	strtoll(char*, char**, int);

extern	int	fmtinstall(int, int (*)(va_list*, Fconv*));
extern	int	numbconv(va_list*, Fconv*);
extern	void	strconv(char*, Fconv*);
extern	int	fltconv(va_list*, Fconv*);

extern	int	isNaN(double);
extern	int	isInf(double, int);

extern	void*	mallocz(int, int);

enum
{
	ICOSSCALE = 1024
};

extern	void		icossin(int, int*, int*);
extern	void		icossin2(int, int, int*, int*);

extern	int	errstr(char*);
extern	void	werrstr(char*, ...);

#define	ARGBEGIN	for(argv++,argc--;\
			    argv[0] && argv[0][0]=='-' && argv[0][1];\
			    argc--, argv++) {\
				char *_args, *_argt;\
				char _argc;\
				_args = &argv[0][1];\
				if(_args[0]=='-' && _args[1]==0){\
					argc--; argv++; break;\
				}\
				_argc = 0;\
				while((_argc = *_args++)!='\0')\
				switch(_argc)
#define	ARGEND		}
#define	ARGF()		(_argt=_args, _args="",\
				(*_argt? _argt: argv[1]? (argc--, *++argv): 0))
#define	ARGC()		_argc