1 /* $OpenBSD: mdef.h,v 1.21 2001/09/27 11:40:33 espie Exp $ */
2 /* $NetBSD: mdef.h,v 1.7 1996/01/13 23:25:27 pk Exp $ */
5 * Copyright (c) 1989, 1993
6 * The Regents of the University of California. All rights reserved.
8 * This code is derived from software contributed to Berkeley by
9 * Ozan Yigit at York University.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 4. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * @(#)mdef.h 8.1 (Berkeley) 6/6/93
74 #define BUILTINTYPE 36
76 #define FILENAMETYPE 38
79 #define ESYSCMDTYPE 41
80 #define TRACEONTYPE 42
81 #define TRACEOFFTYPE 43
84 #define TYPEMASK 63 /* Keep bits really corresponding to a type. */
85 #define RECDEF 256 /* Pure recursive def, don't expand it */
86 #define NOARGS 512 /* builtin needs no args */
87 #define NEEDARGS 1024 /* mark builtin that need args with this */
90 * m4 special characters
103 #define system(str) (-1)
107 * other important constants
111 #define MAXINP 10 /* maximum include files */
112 #define MAXOUT 10 /* maximum # of diversions */
113 #define BUFSIZE 4096 /* starting size of pushback buffer */
114 #define INITSTACKMAX 4096 /* starting size of call stack */
115 #define STRSPMAX 4096 /* starting size of string space */
116 #define MAXTOK 512 /* maximum chars in a tokn */
117 #define HASHSIZE 199 /* maximum size of hashtab */
118 #define MAXCCHARS 5 /* max size of comment/quote delim */
125 #define cycle for(;;)
131 typedef struct ndblock *ndptr;
133 struct ndblock { /* hastable structure */
134 char *name; /* entry name.. */
135 char *defn; /* definition.. */
136 unsigned int type; /* type of the entry.. */
137 unsigned int hv; /* hash function value.. */
138 ndptr nxtptr; /* link to next entry.. */
141 #define nil ((ndptr) 0)
144 const char *knam; /* keyword name */
145 int ktyp; /* keyword type */
148 typedef union { /* stack structure */
149 int sfra; /* frame entry */
150 char *sstr; /* string entry */
156 unsigned long lineno;
160 #define CURRENT_NAME (infile[ilevel].name)
161 #define CURRENT_LINE (infile[ilevel].lineno)
163 * macros for readibility and/or speed
165 * pushf() - push a call frame entry onto stack
166 * pushs() - push a string pointer onto stack
170 if ((uintptr_t)++sp == STACKMAX) \
172 mstack[sp].sfra = (x); \
178 if ((uintptr_t)++sp == STACKMAX) \
180 mstack[sp].sstr = (x); \
186 if ((uintptr_t)++sp == STACKMAX) \
188 mstack[sp].sstr = (x); \
196 * | arg 3 ----------------------->| str |
198 * | arg 2 ---PREVEP-----+ .
201 * +-------+ | +-----+
202 * | plev | PARLEV +-------->| str |
206 * | prcf ---PREVFP--+
215 #define PARLEV (mstack[fp].sfra)
216 #define CALTYP (mstack[fp-1].sfra)
217 #define PREVEP (mstack[fp+3].sstr)
218 #define PREVSP (fp-3)
219 #define PREVFP (mstack[fp-2].sfra)