input.h revision 1556 
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. 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 *	@(#)input.h	8.1 (Berkeley) 5/31/93
37 */
38
39/* PEOF (the end of file marker) is defined in syntax.h */
40
41/*
42 * The input line number.  Input.c just defines this variable, and saves
43 * and restores it when files are pushed and popped.  The user of this
44 * package must set its value.
45 */
46extern int plinno;
47extern int parsenleft;		/* number of characters left in input buffer */
48extern char *parsenextc;	/* next character in input buffer */
49extern int init_editline;	/* 0 == not setup, 1 == OK, -1 == failed */
50
51
52#ifdef __STDC__
53char *pfgets(char *, int);
54int pgetc(void);
55int preadbuffer(void);
56void pungetc(void);
57void pushstring(char *, int, void *);
58void setinputfile(char *, int);
59void setinputfd(int, int);
60void setinputstring(char *, int);
61void popfile(void);
62void popallfiles(void);
63void closescript(void);
64#else
65char *pfgets();
66int pgetc();
67int preadbuffer();
68void pungetc();
69void setinputfile();
70void setinputfd();
71void setinputstring();
72void popfile();
73void popallfiles();
74void pushstring();
75void closescript();
76#endif
77
78#define pgetc_macro()	(--parsenleft >= 0? *parsenextc++ : preadbuffer())
79