1 /*- 2 * Copyright (c) 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * Copyright (c) 1997-2005 5 * Herbert Xu <herbert@gondor.apana.org.au>. 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 * @(#)input.h 8.2 (Berkeley) 5/4/95 35 */ 36 37 /* PEOF (the end of file marker) is defined in syntax.h */ 38 39 enum { 40 INPUT_PUSH_FILE = 1, 41 INPUT_NOFILE_OK = 2, 42 }; 43 44 struct alias; 45 46 struct strpush { 47 struct strpush *prev; /* preceding string on stack */ 48 char *prevstring; 49 int prevnleft; 50 struct alias *ap; /* if push was associated with an alias */ 51 char *string; /* remember the string since it may change */ 52 53 /* Remember last two characters for pungetc. */ 54 int lastc[2]; 55 56 /* Number of outstanding calls to pungetc. */ 57 int unget; 58 }; 59 60 /* 61 * The parsefile structure pointed to by the global variable parsefile 62 * contains information about the current file being read. 63 */ 64 65 struct parsefile { 66 struct parsefile *prev; /* preceding file on stack */ 67 int linno; /* current line */ 68 int fd; /* file descriptor (or -1 if string) */ 69 int nleft; /* number of chars left in this line */ 70 int lleft; /* number of chars left in this buffer */ 71 char *nextc; /* next char in buffer */ 72 char *buf; /* input buffer */ 73 struct strpush *strpush; /* for pushing strings at this level */ 74 struct strpush basestrpush; /* so pushing one is fast */ 75 76 /* Remember last two characters for pungetc. */ 77 int lastc[2]; 78 79 /* Number of outstanding calls to pungetc. */ 80 int unget; 81 }; 82 83 extern struct parsefile *parsefile; 84 85 /* 86 * The input line number. Input.c just defines this variable, and saves 87 * and restores it when files are pushed and popped. The user of this 88 * package must set its value. 89 */ 90 #define plinno (parsefile->linno) 91 92 int pgetc(void); 93 int pgetc2(void); 94 void pungetc(void); 95 void pushstring(char *, void *); 96 void popstring(void); 97 int setinputfile(const char *, int); 98 void setinputstring(char *); 99 void popfile(void); 100 void popallfiles(void); 101 void closescript(void); 102