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 */ 40 extern int plinno; 41 extern int parsenleft; /* number of characters left in input buffer */ 42 extern const char *parsenextc; /* next character in input buffer */ 43 44 struct alias; 45 struct parsefile; 46 47 void resetinput(void); 48 int pgetc(void); 49 int preadbuffer(void); 50 int preadateof(void); 51 void pungetc(void); 52 void pushstring(const char *, int, struct alias *); 53 void setinputfile(const char *, int, int); 54 void setinputfd(int, int); 55 void setinputstring(const char *, int); 56 void popfile(void); 57 struct parsefile *getcurrentfile(void); 58 void popfilesupto(struct parsefile *); 59 void popallfiles(void); 60 void closescript(void); 61 62 #define pgetc_macro() (--parsenleft >= 0? *parsenextc++ : preadbuffer()) 63