1*4887Schin /***********************************************************************
2*4887Schin *                                                                      *
3*4887Schin *               This software is part of the ast package               *
4*4887Schin *           Copyright (c) 1982-2007 AT&T Knowledge Ventures            *
5*4887Schin *                      and is licensed under the                       *
6*4887Schin *                  Common Public License, Version 1.0                  *
7*4887Schin *                      by AT&T Knowledge Ventures                      *
8*4887Schin *                                                                      *
9*4887Schin *                A copy of the License is available at                 *
10*4887Schin *            http://www.opensource.org/licenses/cpl1.0.txt             *
11*4887Schin *         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
12*4887Schin *                                                                      *
13*4887Schin *              Information and Software Systems Research               *
14*4887Schin *                            AT&T Research                             *
15*4887Schin *                           Florham Park NJ                            *
16*4887Schin *                                                                      *
17*4887Schin *                  David Korn <dgk@research.att.com>                   *
18*4887Schin *                                                                      *
19*4887Schin ***********************************************************************/
20*4887Schin #pragma prototyped
21*4887Schin #ifndef fcgetc
22*4887Schin /*
23*4887Schin  * David Korn
24*4887Schin  * AT&T Labs
25*4887Schin  *
26*4887Schin  * Fast character input with sfio text streams and strings
27*4887Schin  *
28*4887Schin  */
29*4887Schin 
30*4887Schin #include	<sfio.h>
31*4887Schin 
32*4887Schin typedef struct _fcin
33*4887Schin {
34*4887Schin 	Sfio_t		*_fcfile;	/* input file pointer */
35*4887Schin 	unsigned char	*fcbuff;	/* pointer to input buffer */
36*4887Schin 	unsigned char	*fclast;	/* pointer to end of input buffer */
37*4887Schin 	unsigned char	*fcptr;		/* pointer to next input char */
38*4887Schin 	unsigned char	fcchar;		/* saved character */
39*4887Schin 	void (*fcfun)(Sfio_t*,const char*,int);	/* advance function */
40*4887Schin 	int		fcleft;		/* for multibyte boundary */
41*4887Schin 	Sfoff_t		fcoff;		/* offset for last read */
42*4887Schin } Fcin_t;
43*4887Schin 
44*4887Schin #define fcfile()	(_Fcin._fcfile)
45*4887Schin #define fcgetc(c)	(((c=fcget()) || (c=fcfill())), c)
46*4887Schin #define	fcget()		((int)(*_Fcin.fcptr++))
47*4887Schin #define	fcpeek(n)	((int)_Fcin.fcptr[n])
48*4887Schin #define	fcseek(n)	((char*)(_Fcin.fcptr+=(n)))
49*4887Schin #define fcfirst()	((char*)_Fcin.fcbuff)
50*4887Schin #define fcsopen(s)	(_Fcin._fcfile=(Sfio_t*)0,_Fcin.fcbuff=_Fcin.fcptr=(unsigned char*)(s))
51*4887Schin #define fctell()	(_Fcin.fcoff + (_Fcin.fcptr-_Fcin.fcbuff))
52*4887Schin #define fcsave(x)	(*(x) = _Fcin)
53*4887Schin #define fcrestore(x)	(_Fcin = *(x))
54*4887Schin extern int		fcfill(void);
55*4887Schin extern int		fcfopen(Sfio_t*);
56*4887Schin extern int		fcclose(void);
57*4887Schin void			fcnotify(void(*)(Sfio_t*,const char*,int));
58*4887Schin extern int		fcmbstate(const char*,int*,int*);
59*4887Schin 
60*4887Schin extern Fcin_t		_Fcin;		/* used by macros */
61*4887Schin 
62*4887Schin #endif /* fcgetc */
63