/***********************************************************************
*                                                                      *
*               This software is part of the ast package               *
*          Copyright (c) 1985-2009 AT&T Intellectual Property          *
*                      and is licensed under the                       *
*                  Common Public License, Version 1.0                  *
*                    by AT&T Intellectual Property                     *
*                                                                      *
*                A copy of the License is available at                 *
*            http://www.opensource.org/licenses/cpl1.0.txt             *
*         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
*                                                                      *
*              Information and Software Systems Research               *
*                            AT&T Research                             *
*                           Florham Park NJ                            *
*                                                                      *
*                 Glenn Fowler <gsf@research.att.com>                  *
*                  David Korn <dgk@research.att.com>                   *
*                   Phong Vo <kpv@research.att.com>                    *
*                                                                      *
***********************************************************************/
#ifndef _SFIO_H
#define _SFIO_H	1

#define SFIO_VERSION	20080717L

/*	Public header file for the sfio library
**
**	Written by Kiem-Phong Vo
*/

typedef struct _sfio_s		Sfio_t;
typedef struct _sfdisc_s	Sfdisc_t;

#if defined(_AST_STD_H) || defined(_PACKAGE_ast) && defined(_SFIO_PRIVATE)
#include	<ast_std.h>
#else
#include	<ast_common.h>
#endif /* _PACKAGE_ast */

/* Sfoff_t should be large enough for largest file address */
#define Sfoff_t		intmax_t
#define Sflong_t	intmax_t
#define Sfulong_t	uintmax_t
#define Sfdouble_t	_ast_fltmax_t

typedef ssize_t		(*Sfread_f)_ARG_((Sfio_t*, Void_t*, size_t, Sfdisc_t*));
typedef ssize_t		(*Sfwrite_f)_ARG_((Sfio_t*, const Void_t*, size_t, Sfdisc_t*));
typedef Sfoff_t		(*Sfseek_f)_ARG_((Sfio_t*, Sfoff_t, int, Sfdisc_t*));
typedef int		(*Sfexcept_f)_ARG_((Sfio_t*, int, Void_t*, Sfdisc_t*));

/* discipline structure */
struct _sfdisc_s
{	Sfread_f	readf;		/* read function		*/
	Sfwrite_f	writef;		/* write function		*/
	Sfseek_f	seekf;		/* seek function		*/
	Sfexcept_f	exceptf;	/* to handle exceptions		*/
	Sfdisc_t*	disc;		/* the continuing discipline	*/
};

#include <sfio_s.h>

/* formatting environment */
typedef struct _sffmt_s	Sffmt_t;
typedef int		(*Sffmtext_f)_ARG_((Sfio_t*, Void_t*, Sffmt_t*));
typedef int		(*Sffmtevent_f)_ARG_((Sfio_t*, int, Void_t*, Sffmt_t*));
struct _sffmt_s
{	long		version;/* version of this structure		*/
	Sffmtext_f	extf;	/* function to process arguments	*/
	Sffmtevent_f	eventf;	/* process events			*/

	char*		form;	/* format string to stack		*/
	va_list	args;	/* corresponding arg list		*/

	int		fmt;	/* format character			*/
	ssize_t		size;	/* object size				*/
	int		flags;	/* formatting flags			*/
	int		width;	/* width of field			*/
	int		precis;	/* precision required			*/
	int		base;	/* conversion base			*/

	char*		t_str;	/* type string 				*/
	ssize_t		n_str;	/* length of t_str 			*/

	Void_t*		mbs;	/* multibyte state for format string	*/

	Void_t*		none;	/* unused for now			*/
};
#define sffmtversion(fe,type) \
		((type) ? ((fe)->version = SFIO_VERSION) : (fe)->version)

#define SFFMT_SSHORT	000000010 /* 'hh' flag, char			*/
#define SFFMT_TFLAG	000000020 /* 't' flag, ptrdiff_t			*/
#define SFFMT_ZFLAG	000000040 /* 'z' flag, size_t			*/

#define SFFMT_LEFT	000000100 /* left-justification			*/
#define SFFMT_SIGN	000000200 /* must have a sign			*/
#define SFFMT_BLANK	000000400 /* if not signed, prepend a blank	*/
#define SFFMT_ZERO	000001000 /* zero-padding on the left		*/
#define SFFMT_ALTER	000002000 /* alternate formatting		*/
#define SFFMT_THOUSAND	000004000 /* thousand grouping			*/
#define SFFMT_SKIP	000010000 /* skip assignment in scanf()		*/
#define SFFMT_SHORT	000020000 /* 'h' flag				*/
#define SFFMT_LONG	000040000 /* 'l' flag				*/
#define SFFMT_LLONG	000100000 /* 'll' flag				*/
#define SFFMT_LDOUBLE	000200000 /* 'L' flag				*/
#define SFFMT_VALUE	000400000 /* value is returned			*/
#define SFFMT_ARGPOS	001000000 /* getting arg for $ patterns		*/
#define SFFMT_IFLAG	002000000 /* 'I' flag				*/
#define SFFMT_JFLAG	004000000 /* 'j' flag, intmax_t			*/
#define SFFMT_CENTER	010000000 /* '=' flag, center justification	*/
#define SFFMT_SET	017777770 /* flags settable on calling extf	*/

/* for sfmutex() call */
#define SFMTX_LOCK	0	/* up mutex count			*/
#define SFMTX_TRYLOCK	1	/* try to up mutex count		*/
#define SFMTX_UNLOCK	2	/* down mutex count			*/
#define SFMTX_CLRLOCK	3	/* clear mutex count			*/

/* various constants */
#ifndef NULL
#define NULL		0
#endif
#ifndef EOF
#define EOF		(-1)
#endif
#ifndef SEEK_SET
#define SEEK_SET	0
#define SEEK_CUR	1
#define SEEK_END	2
#endif

/* bits for various types of files */
#define	SF_READ		0000001	/* open for reading			*/
#define SF_WRITE	0000002	/* open for writing			*/
#define SF_STRING	0000004	/* a string stream			*/
#define SF_APPENDWR	0000010	/* file is in append mode only		*/
#define SF_MALLOC	0000020	/* buffer is malloc-ed			*/
#define SF_LINE		0000040	/* line buffering			*/
#define SF_SHARE	0000100	/* stream with shared file descriptor 	*/
#define SF_EOF		0000200	/* eof was detected			*/
#define SF_ERROR	0000400	/* an error happened			*/
#define SF_STATIC	0001000	/* a stream that cannot be freed	*/
#define SF_IOCHECK	0002000	/* call exceptf before doing IO		*/
#define SF_PUBLIC	0004000	/* SF_SHARE and follow physical seek	*/
#define SF_MTSAFE	0010000	/* need thread safety			*/
#define SF_WHOLE	0020000	/* preserve wholeness of sfwrite/sfputr */
#define SF_IOINTR	0040000	/* return on interrupts			*/
#define SF_WCWIDTH	0100000	/* wcwidth display stream		*/

#define SF_FLAGS	0177177	/* PUBLIC FLAGS PASSABLE TO SFNEW()	*/
#define SF_SETS		0177163	/* flags passable to sfset()		*/

#ifndef _SF_NO_OBSOLETE
#define SF_BUFCONST	0400000 /* unused flag - for compatibility only	*/
#endif

/* for sfgetr/sfreserve to hold a record */
#define SF_LOCKR	0000010	/* lock record, stop access to stream	*/
#define SF_LASTR	0000020	/* get the last incomplete record	*/

/* exception events: SF_NEW(0), SF_READ(1), SF_WRITE(2) and the below 	*/
#define SF_SEEK		3	/* seek error				*/
#define SF_CLOSING	4	/* when stream is about to be closed	*/
#define SF_DPUSH	5	/* when discipline is being pushed	*/
#define SF_DPOP		6	/* when discipline is being popped	*/
#define SF_DPOLL	7	/* see if stream is ready for I/O	*/
#define SF_DBUFFER	8	/* buffer not empty during push or pop	*/
#define SF_SYNC		9	/* announcing start/end synchronization */
#define SF_PURGE	10	/* a sfpurge() call was issued		*/
#define SF_FINAL	11	/* closing is done except stream free	*/
#define SF_READY	12	/* a polled stream is ready		*/
#define SF_LOCKED	13	/* stream is in a locked state		*/
#define SF_ATEXIT	14	/* process is exiting			*/
#define SF_EVENT	100	/* start of user-defined events		*/

/* for stack and disciplines */
#define SF_POPSTACK	((Sfio_t*)0)	/* pop the stream stack		*/
#define SF_POPDISC	((Sfdisc_t*)0)	/* pop the discipline stack	*/

/* for the notify function and discipline exception */
#define SF_NEW		0	/* new stream				*/
#define SF_SETFD	(-1)	/* about to set the file descriptor 	*/
#define SF_MTACCESS	(-2)	/* starting a multi-threaded stream	*/

#define SF_BUFSIZE	8192	/* default buffer size			*/
#define SF_UNBOUND	(-1)	/* unbounded buffer size		*/

/* namespace incursion workarounds -- migrate to the new names */
#if !_mac_SF_APPEND
#define SF_APPEND	SF_APPENDWR	/* BSDI sys/stat.h		*/
#endif
#if !_mac_SF_CLOSE
#define SF_CLOSE	SF_CLOSING	/* AIX sys/socket.h		*/
#endif

_BEGIN_EXTERNS_

/* standard in/out/err streams */

#if _BLD_sfio && defined(__EXPORT__)
#define extern		extern __EXPORT__
#endif
#if !_BLD_sfio && defined(__IMPORT__)
#define extern		extern __IMPORT__
#endif

extern ssize_t		_Sfi;
extern ssize_t		_Sfmaxr;

extern Sfio_t*		sfstdin;
extern Sfio_t*		sfstdout;
extern Sfio_t*		sfstderr;

#if _UWIN
#undef	extern
#endif

extern Sfio_t		_Sfstdin;
extern Sfio_t		_Sfstdout;
extern Sfio_t		_Sfstderr;

#undef	extern

#if _BLD_sfio && defined(__EXPORT__)
#define extern	__EXPORT__
#endif

extern Sfio_t*		sfnew _ARG_((Sfio_t*, Void_t*, size_t, int, int));
extern Sfio_t*		sfopen _ARG_((Sfio_t*, const char*, const char*));
extern Sfio_t*		sfpopen _ARG_((Sfio_t*, const char*, const char*));
extern Sfio_t*		sfstack _ARG_((Sfio_t*, Sfio_t*));
extern Sfio_t*		sfswap _ARG_((Sfio_t*, Sfio_t*));
extern Sfio_t*		sftmp _ARG_((size_t));
extern int		sfpurge _ARG_((Sfio_t*));
extern int		sfpoll _ARG_((Sfio_t**, int, int));
extern Void_t*		sfreserve _ARG_((Sfio_t*, ssize_t, int));
extern int		sfresize _ARG_((Sfio_t*, Sfoff_t));
extern int		sfsync _ARG_((Sfio_t*));
extern int		sfclrlock _ARG_((Sfio_t*));
extern Void_t*		sfsetbuf _ARG_((Sfio_t*, Void_t*, size_t));
extern Sfdisc_t*	sfdisc _ARG_((Sfio_t*,Sfdisc_t*));
extern int		sfraise _ARG_((Sfio_t*, int, Void_t*));
extern int		sfnotify _ARG_((void(*)(Sfio_t*, int, void*)));
extern int		sfset _ARG_((Sfio_t*, int, int));
extern int		sfsetfd _ARG_((Sfio_t*, int));
extern Sfio_t*		sfpool _ARG_((Sfio_t*, Sfio_t*, int));
extern ssize_t		sfread _ARG_((Sfio_t*, Void_t*, size_t));
extern ssize_t		sfwrite _ARG_((Sfio_t*, const Void_t*, size_t));
extern Sfoff_t		sfmove _ARG_((Sfio_t*, Sfio_t*, Sfoff_t, int));
extern int		sfclose _ARG_((Sfio_t*));
extern Sfoff_t		sftell _ARG_((Sfio_t*));
extern Sfoff_t		sfseek _ARG_((Sfio_t*, Sfoff_t, int));
extern ssize_t		sfputr _ARG_((Sfio_t*, const char*, int));
extern char*		sfgetr _ARG_((Sfio_t*, int, int));
extern ssize_t		sfnputc _ARG_((Sfio_t*, int, size_t));
extern int		sfungetc _ARG_((Sfio_t*, int));
extern int		sfprintf _ARG_((Sfio_t*, const char*, ...));
extern char*		sfprints _ARG_((const char*, ...));
extern ssize_t		sfsprintf _ARG_((char*, size_t, const char*, ...));
extern ssize_t		sfvsprintf _ARG_((char*, size_t, const char*, va_list));
extern int		sfvprintf _ARG_((Sfio_t*, const char*, va_list));
extern int		sfscanf _ARG_((Sfio_t*, const char*, ...));
extern int		sfsscanf _ARG_((const char*, const char*, ...));
extern int		sfvsscanf _ARG_((const char*, const char*, va_list));
extern int		sfvscanf _ARG_((Sfio_t*, const char*, va_list));

/* mutex locking for thread-safety */
extern int		sfmutex _ARG_((Sfio_t*, int));

/* io functions with discipline continuation */
extern ssize_t		sfrd _ARG_((Sfio_t*, Void_t*, size_t, Sfdisc_t*));
extern ssize_t		sfwr _ARG_((Sfio_t*, const Void_t*, size_t, Sfdisc_t*));
extern Sfoff_t		sfsk _ARG_((Sfio_t*, Sfoff_t, int, Sfdisc_t*));
extern ssize_t		sfpkrd _ARG_((int, Void_t*, size_t, int, long, int));

/* portable handling of primitive types */
extern int		sfdlen _ARG_((Sfdouble_t));
extern int		sfllen _ARG_((Sflong_t));
extern int		sfulen _ARG_((Sfulong_t));

extern int		sfputd _ARG_((Sfio_t*, Sfdouble_t));
extern int		sfputl _ARG_((Sfio_t*, Sflong_t));
extern int		sfputu _ARG_((Sfio_t*, Sfulong_t));
extern int		sfputm _ARG_((Sfio_t*, Sfulong_t, Sfulong_t));
extern int		sfputc _ARG_((Sfio_t*, int));

extern Sfdouble_t	sfgetd _ARG_((Sfio_t*));
extern Sflong_t		sfgetl _ARG_((Sfio_t*));
extern Sfulong_t	sfgetu _ARG_((Sfio_t*));
extern Sfulong_t	sfgetm _ARG_((Sfio_t*, Sfulong_t));
extern int		sfgetc _ARG_((Sfio_t*));

extern int		_sfputd _ARG_((Sfio_t*, Sfdouble_t));
extern int		_sfputl _ARG_((Sfio_t*, Sflong_t));
extern int		_sfputu _ARG_((Sfio_t*, Sfulong_t));
extern int		_sfputm _ARG_((Sfio_t*, Sfulong_t, Sfulong_t));
extern int		_sfflsbuf _ARG_((Sfio_t*, int));

extern int		_sffilbuf _ARG_((Sfio_t*, int));

extern int		_sfdlen _ARG_((Sfdouble_t));
extern int		_sfllen _ARG_((Sflong_t));
extern int		_sfulen _ARG_((Sfulong_t));

/* miscellaneous function analogues of fast in-line functions */
extern Sfoff_t		sfsize _ARG_((Sfio_t*));
extern int		sfclrerr _ARG_((Sfio_t*));
extern int		sfeof _ARG_((Sfio_t*));
extern int		sferror _ARG_((Sfio_t*));
extern int		sffileno _ARG_((Sfio_t*));
extern int		sfstacked _ARG_((Sfio_t*));
extern ssize_t		sfvalue _ARG_((Sfio_t*));
extern ssize_t		sfslen _ARG_((void));
extern ssize_t		sfmaxr _ARG_((ssize_t, int));

#undef extern
_END_EXTERNS_

/* coding long integers in a portable and compact fashion */
#define SF_SBITS	6
#define SF_UBITS	7
#define SF_BBITS	8
#define SF_SIGN		(1 << SF_SBITS)
#define SF_MORE		(1 << SF_UBITS)
#define SF_BYTE		(1 << SF_BBITS)
#define SF_U1		SF_MORE
#define SF_U2		(SF_U1*SF_U1)
#define SF_U3		(SF_U2*SF_U1)
#define SF_U4		(SF_U3*SF_U1)

#if __cplusplus
#define _SF_(f)		(f)
#else
#define _SF_(f)		((Sfio_t*)(f))
#endif

#define __sf_putd(f,v)		(_sfputd(_SF_(f),(Sfdouble_t)(v)))
#define __sf_putl(f,v)		(_sfputl(_SF_(f),(Sflong_t)(v)))
#define __sf_putu(f,v)		(_sfputu(_SF_(f),(Sfulong_t)(v)))
#define __sf_putm(f,v,m)	(_sfputm(_SF_(f),(Sfulong_t)(v),(Sfulong_t)(m)))

#define __sf_putc(f,c)	(_SF_(f)->_next >= _SF_(f)->_endw ? \
			 _sfflsbuf(_SF_(f),(int)((unsigned char)(c))) : \
			 (int)(*_SF_(f)->_next++ = (unsigned char)(c)) )
#define __sf_getc(f)	(_SF_(f)->_next >= _SF_(f)->_endr ? _sffilbuf(_SF_(f),0) : \
			 (int)(*_SF_(f)->_next++) )

#define __sf_dlen(v)	(_sfdlen((Sfdouble_t)(v)) )
#define __sf_llen(v)	(_sfllen((Sflong_t)(v)) )
#define __sf_ulen(v)	((Sfulong_t)(v) < SF_U1 ? 1 : (Sfulong_t)(v) < SF_U2 ? 2 : \
			 (Sfulong_t)(v) < SF_U3 ? 3 : (Sfulong_t)(v) < SF_U4 ? 4 : 5)

#define __sf_fileno(f)	(_SF_(f)->_file)
#define __sf_eof(f)	(_SF_(f)->_flags&SF_EOF)
#define __sf_error(f)	(_SF_(f)->_flags&SF_ERROR)
#define __sf_clrerr(f)	(_SF_(f)->_flags &= ~(SF_ERROR|SF_EOF))
#define __sf_stacked(f)	(_SF_(f)->_push != (Sfio_t*)0)
#define __sf_value(f)	(_SF_(f)->_val)
#define __sf_slen()	(_Sfi)
#define __sf_maxr(n,s)	((s)?((_Sfi=_Sfmaxr),(_Sfmaxr=(n)),_Sfi):_Sfmaxr)

#if defined(__INLINE__) && !_BLD_sfio

__INLINE__ int sfputd(Sfio_t* f, Sfdouble_t v)	{ return __sf_putd(f,v); }
__INLINE__ int sfputl(Sfio_t* f, Sflong_t v)	{ return __sf_putl(f,v); }
__INLINE__ int sfputu(Sfio_t* f, Sfulong_t v)	{ return __sf_putu(f,v); }
__INLINE__ int sfputm(Sfio_t* f, Sfulong_t v, Sfulong_t m)
						{ return __sf_putm(f,v,m); }

__INLINE__ int sfputc(Sfio_t* f, int c)		{ return __sf_putc(f,c); }
__INLINE__ int sfgetc(Sfio_t* f)		{ return __sf_getc(f); }

__INLINE__ int sfdlen(Sfdouble_t v)		{ return __sf_dlen(v); }
__INLINE__ int sfllen(Sflong_t v)		{ return __sf_llen(v); }
__INLINE__ int sfulen(Sfulong_t v)		{ return __sf_ulen(v); }

__INLINE__ int sffileno(Sfio_t* f)		{ return __sf_fileno(f); }
__INLINE__ int sfeof(Sfio_t* f)			{ return __sf_eof(f); }
__INLINE__ int sferror(Sfio_t* f)		{ return __sf_error(f); }
__INLINE__ int sfclrerr(Sfio_t* f)		{ return __sf_clrerr(f); }
__INLINE__ int sfstacked(Sfio_t* f)		{ return __sf_stacked(f); }
__INLINE__ ssize_t sfvalue(Sfio_t* f)		{ return __sf_value(f); }
__INLINE__ ssize_t sfslen()			{ return __sf_slen(); }
__INLINE__ ssize_t sfmaxr(ssize_t n, int s)	{ return __sf_maxr(n,s); }

#else

#define sfputd(f,v)				( __sf_putd((f),(v)) )
#define sfputl(f,v)				( __sf_putl((f),(v)) )
#define sfputu(f,v)				( __sf_putu((f),(v)) )
#define sfputm(f,v,m)				( __sf_putm((f),(v),(m)) )

#define sfputc(f,c)				( __sf_putc((f),(c)) )
#define sfgetc(f)				( __sf_getc(f) )

#define sfdlen(v)				( __sf_dlen(v) )
#define sfllen(v)				( __sf_llen(v) )
#define sfulen(v)				( __sf_ulen(v) )

#define sffileno(f)				( __sf_fileno(f) )
#define sfeof(f)				( __sf_eof(f) )
#define sferror(f)				( __sf_error(f) )
#define sfclrerr(f)				( __sf_clrerr(f) )
#define sfstacked(f)				( __sf_stacked(f) )
#define sfvalue(f)				( __sf_value(f) )
#define sfslen()				( __sf_slen() )
#define sfmaxr(n,s)				( __sf_maxr(n,s) )

#endif /*__INLINE__*/

#ifndef _SFSTR_H /* GSF's string manipulation stuff */
#define _SFSTR_H		1

#define sfstropen()		sfnew(0, 0, -1, -1, SF_READ|SF_WRITE|SF_STRING)
#define sfstrclose(f)		sfclose(f)

#define sfstrseek(f,p,m) \
	( (m) == SEEK_SET ? \
	 	(((p) < 0 || (p) > (f)->_size) ? (char*)0 : \
		 (char*)((f)->_next = (f)->_data+(p)) ) \
	: (m) == SEEK_CUR ? \
		((f)->_next += (p), \
		 (((f)->_next < (f)->_data || (f)->_next > (f)->_data+(f)->_size) ? \
			((f)->_next -= (p), (char*)0) : (char*)(f)->_next ) ) \
	: (m) == SEEK_END ? \
		( ((p) > 0 || (f)->_size+(p) < 0) ? (char*)0 : \
			(char*)((f)->_next = (f)->_data+(f)->_size+(p)) ) \
	: (char*)0 \
	)

#define sfstrsize(f)		((f)->_size)
#define sfstrtell(f)		((f)->_next - (f)->_data)
#define sfstrpend(f)		((f)->_size - sfstrtell())
#define sfstrbase(f)		((char*)(f)->_data)

#define sfstruse(f) \
	(sfputc((f),0) < 0 ? (char*)0 : (char*)((f)->_next = (f)->_data) \
	)

#define sfstrrsrv(f,n) \
	(sfreserve((f),(n),SF_WRITE|SF_LOCKR), sfwrite((f),(f)->_next,0), \
	 ((f)->_next+(n) <= (f)->_data+(f)->_size ? (char*)(f)->_next : (char*)0) \
	)

#define sfstrbuf(f,b,n,m) \
	(sfsetbuf((f),(b),(n)), ((f)->_flags |= (m) ? SF_MALLOC : 0), \
	 ((f)->_data == (unsigned char*)(b) ? 0 : -1) \
	)

#endif /* _SFSTR_H */

#endif /* _SFIO_H */
