1 /*********************************************************************** 2 * * 3 * This software is part of the ast package * 4 * Copyright (c) 1982-2009 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 */ 64