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input.h revision 1.4 
      1 /*-
      2  * Copyright (c) 1991 The Regents of the University of California.
      3  * All rights reserved.
      4  *
      5  * This code is derived from software contributed to Berkeley by
      6  * Kenneth Almquist.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *	This product includes software developed by the University of
     19  *	California, Berkeley and its contributors.
     20  * 4. Neither the name of the University nor the names of its contributors
     21  *    may be used to endorse or promote products derived from this software
     22  *    without specific prior written permission.
     23  *
     24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     34  * SUCH DAMAGE.
     35  *
     36  *	from: @(#)input.h	5.1 (Berkeley) 3/7/91
     37  *	$Id: input.h,v 1.4 1993/08/01 18:58:27 mycroft Exp $
     38  */
     39 
     40 /* PEOF (the end of file marker) is defined in syntax.h */
     41 
     42 /*
     43  * The input line number.  Input.c just defines this variable, and saves
     44  * and restores it when files are pushed and popped.  The user of this
     45  * package must set its value.
     46  */
     47 extern int plinno;
     48 extern int parsenleft;		/* number of characters left in input buffer */
     49 extern char *parsenextc;	/* next character in input buffer */
     50 
     51 
     52 #ifdef __STDC__
     53 char *pfgets(char *, int);
     54 int pgetc(void);
     55 int preadbuffer(void);
     56 void pungetc(void);
     57 void ppushback(char *, int);
     58 void setinputfile(char *, int);
     59 void setinputfd(int, int);
     60 void setinputstring(char *, int);
     61 void popfile(void);
     62 void popallfiles(void);
     63 void closescript(void);
     64 #else
     65 char *pfgets();
     66 int pgetc();
     67 int preadbuffer();
     68 void pungetc();
     69 void ppushback();
     70 void setinputfile();
     71 void setinputfd();
     72 void setinputstring();
     73 void popfile();
     74 void popallfiles();
     75 void closescript();
     76 #endif
     77 
     78 #define pgetc_macro()	(--parsenleft >= 0? *parsenextc++ : preadbuffer())
     79