1/*-
2 * Copyright (c) 1991, 1993
3 *	The Regents of the University of California.  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. Neither the name of the University nor the names of its contributors
17 *    may be used to endorse or promote products derived from this software
18 *    without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33/* PEOF (the end of file marker) is defined in syntax.h */
34
35/*
36 * The input line number.  Input.c just defines this variable, and saves
37 * and restores it when files are pushed and popped.  The user of this
38 * package must set its value.
39 */
40extern int plinno;
41extern int parsenleft;		/* number of characters left in input buffer */
42extern const char *parsenextc;	/* next character in input buffer */
43
44struct alias;
45struct parsefile;
46
47void resetinput(void);
48int pgetc(void);
49int preadbuffer(void);
50int preadateof(void);
51void pungetc(void);
52void pushstring(const char *, int, struct alias *);
53void setinputfile(const char *, int, int);
54void setinputfd(int, int);
55void setinputstring(const char *, int);
56void popfile(void);
57struct parsefile *getcurrentfile(void);
58void popfilesupto(struct parsefile *);
59void popallfiles(void);
60void closescript(void);
61
62#define pgetc_macro()	(--parsenleft >= 0? *parsenextc++ : preadbuffer())
63