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GitHub Repository: att/ast
 Path: blob/master/src/cmd/ksh93/include/fcin.h
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/***********************************************************************

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*                                                                      *

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*               This software is part of the ast package               *

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*          Copyright (c) 1982-2011 AT&T Intellectual Property          *

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*                      and is licensed under the                       *

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*                 Eclipse Public License, Version 1.0                  *

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*                    by AT&T Intellectual Property                     *

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*                                                                      *

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*                A copy of the License is available at                 *

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*          http://www.eclipse.org/org/documents/epl-v10.html           *

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*         (with md5 checksum b35adb5213ca9657e911e9befb180842)         *

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*                                                                      *

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*              Information and Software Systems Research               *

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*                            AT&T Research                             *

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*                           Florham Park NJ                            *

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*                                                                      *

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*                  David Korn <[email protected]>                   *

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*                                                                      *

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***********************************************************************/

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#pragma prototyped

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#ifndef fcgetc

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/*

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 * David Korn

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 * AT&T Labs

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 *

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 * Fast character input with sfio text streams and strings

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 *

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 */

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#include	<sfio.h>

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typedef struct _fcin

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{

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	Sfio_t		*_fcfile;	/* input file pointer */

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	unsigned char	*fcbuff;	/* pointer to input buffer */

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	unsigned char	*fclast;	/* pointer to end of input buffer */

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	unsigned char	*fcptr;		/* pointer to next input char */

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	unsigned char	fcchar;		/* saved character */

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	short		fclen;		/* last multibyte char len */

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	void (*fcfun)(Sfio_t*,const char*,int,void*);	/* advance function */

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	void		*context;	/* context pointer */

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	int		fcleft;		/* for multibyte boundary */

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	Sfoff_t		fcoff;		/* offset for last read */

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} Fcin_t;

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#if SHOPT_MULTIBYTE

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#   define fcmbget(x)	(mbwide()?_fcmbget(x):fcget())

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#else

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#   define fcmbget(x)	(fcget())

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#endif

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#define fcfile()	(_Fcin._fcfile)

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#define fcgetc(c)	(((c=fcget()) || (c=fcfill())), c)

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#define	fcget()		((int)(*_Fcin.fcptr++))

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#define	fcpeek(n)	((int)_Fcin.fcptr[n])

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#define	fcseek(n)	((char*)(_Fcin.fcptr+=(n)))

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#define fcfirst()	((char*)_Fcin.fcbuff)

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#define fclast()	((char*)_Fcin.fclast)

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#define fcleft()	(_Fcin.fclast-_Fcin.fcptr)

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#define fcsopen(s)	(_Fcin._fcfile=(Sfio_t*)0,_Fcin.fclen=1,_Fcin.fcbuff=_Fcin.fcptr=(unsigned char*)(s))

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#define fctell()	(_Fcin.fcoff + (_Fcin.fcptr-_Fcin.fcbuff))

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#define fcsave(x)	(*(x) = _Fcin)

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#define fcrestore(x)	(_Fcin = *(x))

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extern int		fcfill(void);

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extern int		fcfopen(Sfio_t*);

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extern int		fcclose(void);

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void			fcnotify(void(*)(Sfio_t*,const char*,int,void*),void*);

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extern int		_fcmbget(short*);

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extern Fcin_t		_Fcin;		/* used by macros */

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#endif /* fcgetc */

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