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