usr/src/lib/libshell/common/include/fcin.h

   1 /***********************************************************************
   2 *                                                                      *
   3 *               This software is part of the ast package               *
   4 *          Copyright (c) 1982-2010 AT&T Intellectual Property          *
   5 *                      and is licensed under the                       *
   6 *                  Common Public License, Version 1.0                  *
   7 *                    by AT&T Intellectual Property                     *
   8 *                                                                      *
   9 *                A copy of the License is available at                 *
  10 *            http://www.opensource.org/licenses/cpl1.0.txt             *
  11 *         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
  12 *                                                                      *
  13 *              Information and Software Systems Research               *
  14 *                            AT&T Research                             *
  15 *                           Florham Park NJ                            *
  16 *                                                                      *
  17 *                  David Korn <dgk@research.att.com>                   *
  18 *                                                                      *
  19 ***********************************************************************/
  20 #pragma prototyped
  21 #ifndef fcgetc
  22 /*
  23  * David Korn
  24  * AT&T Labs
  25  *
  26  * Fast character input with sfio text streams and strings
  27  *
  28  */
  29
  30 #include        <sfio.h>
  31
  32 typedef struct _fcin
  33 {
  34         Sfio_t          *_fcfile;       /* input file pointer */
  35         unsigned char   *fcbuff;        /* pointer to input buffer */
  36         unsigned char   *fclast;        /* pointer to end of input buffer */
  37         unsigned char   *fcptr;         /* pointer to next input char */
  38         unsigned char   fcchar;         /* saved character */
  39         void (*fcfun)(Sfio_t*,const char*,int,void*);   /* advance function */
  40         void            *context;       /* context pointer */
  41         int             fcleft;         /* for multibyte boundary */
  42         Sfoff_t         fcoff;          /* offset for last read */
  43 } Fcin_t;
  44
  45 #define fcfile()        (_Fcin._fcfile)
  46 #define fcgetc(c)       (((c=fcget()) || (c=fcfill())), c)
  47 #define fcget()         ((int)(*_Fcin.fcptr++))
  48 #define fcpeek(n)       ((int)_Fcin.fcptr[n])
  49 #define fcseek(n)       ((char*)(_Fcin.fcptr+=(n)))
  50 #define fcfirst()       ((char*)_Fcin.fcbuff)
  51 #define fcsopen(s)      (_Fcin._fcfile=(Sfio_t*)0,_Fcin.fcbuff=_Fcin.fcptr=(unsigned char*)(s))
  52 #define fctell()        (_Fcin.fcoff + (_Fcin.fcptr-_Fcin.fcbuff))
  53 #define fcsave(x)       (*(x) = _Fcin)
  54 #define fcrestore(x)    (_Fcin = *(x))
  55 extern int              fcfill(void);
  56 extern int              fcfopen(Sfio_t*);
  57 extern int              fcclose(void);
  58 void                    fcnotify(void(*)(Sfio_t*,const char*,int,void*),void*);
  59 extern int              fcmbstate(const char*,int*,int*);
  60
  61 extern Fcin_t           _Fcin;          /* used by macros */
  62
  63 #endif /* fcgetc */