xref: /openbsd/usr.bin/m4/mdef.h (revision d9a51c35)
1 /*	$OpenBSD: mdef.h,v 1.34 2022/12/26 19:16:01 jmc Exp $	*/
2 /*	$NetBSD: mdef.h,v 1.7 1996/01/13 23:25:27 pk Exp $	*/
3 
4 /*
5  * Copyright (c) 1989, 1993
6  *	The Regents of the University of California.  All rights reserved.
7  *
8  * This code is derived from software contributed to Berkeley by
9  * Ozan Yigit at York University.
10  *
11  * Redistribution and use in source and binary forms, with or without
12  * modification, are permitted provided that the following conditions
13  * are met:
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  * 3. 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.
22  *
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
33  * SUCH DAMAGE.
34  *
35  *	@(#)mdef.h	8.1 (Berkeley) 6/6/93
36  */
37 
38 #ifdef __GNUC__
39 # define UNUSED	__attribute__((__unused__))
40 #else
41 # define UNUSED
42 #endif
43 
44 #define MACRTYPE        1
45 #define DEFITYPE        2
46 #define EXPRTYPE        3
47 #define SUBSTYPE        4
48 #define IFELTYPE        5
49 #define LENGTYPE        6
50 #define CHNQTYPE        7
51 #define SYSCTYPE        8
52 #define UNDFTYPE        9
53 #define INCLTYPE        10
54 #define SINCTYPE        11
55 #define PASTTYPE        12
56 #define SPASTYPE        13
57 #define INCRTYPE        14
58 #define IFDFTYPE        15
59 #define PUSDTYPE        16
60 #define POPDTYPE        17
61 #define SHIFTYPE        18
62 #define DECRTYPE        19
63 #define DIVRTYPE        20
64 #define UNDVTYPE        21
65 #define DIVNTYPE        22
66 #define MKTMTYPE        23
67 #define ERRPTYPE        24
68 #define M4WRTYPE        25
69 #define TRNLTYPE        26
70 #define DNLNTYPE        27
71 #define DUMPTYPE        28
72 #define CHNCTYPE        29
73 #define INDXTYPE        30
74 #define SYSVTYPE        31
75 #define EXITTYPE        32
76 #define DEFNTYPE        33
77 #define SELFTYPE	34
78 #define INDIRTYPE	35
79 #define BUILTINTYPE	36
80 #define PATSTYPE	37
81 #define FILENAMETYPE	38
82 #define LINETYPE	39
83 #define REGEXPTYPE	40
84 #define ESYSCMDTYPE	41
85 #define TRACEONTYPE	42
86 #define TRACEOFFTYPE	43
87 #define FORMATTYPE	44
88 
89 #define BUILTIN_MARKER	"__builtin_"
90 
91 #define TYPEMASK	63	/* Keep bits really corresponding to a type. */
92 #define RECDEF		256	/* Pure recursive def, don't expand it */
93 #define NOARGS		512	/* builtin needs no args */
94 #define NEEDARGS	1024	/* mark builtin that need args with this */
95 
96 /*
97  * m4 special characters
98  */
99 
100 #define ARGFLAG         '$'
101 #define LPAREN          '('
102 #define RPAREN          ')'
103 #define LQUOTE          '`'
104 #define RQUOTE          '\''
105 #define COMMA           ','
106 #define SCOMMT          '#'
107 #define ECOMMT          '\n'
108 
109 /*
110  * other important constants
111  */
112 
113 #define EOS             '\0'
114 #define MAXINP          10              /* maximum include files	    */
115 #define MAXOUT          10              /* maximum # of diversions	    */
116 #define BUFSIZE         4096            /* starting size of pushback buffer */
117 #define INITSTACKMAX    4096		/* starting size of call stack      */
118 #define STRSPMAX        4096            /* starting size of string space    */
119 #define MAXTOK          512		/* maximum chars in a tokn	    */
120 #define MAXCCHARS	5		/* max size of comment/quote delim  */
121 
122 #define ALL             1
123 #define TOP             0
124 
125 #define TRUE            1
126 #define FALSE           0
127 #define cycle           for(;;)
128 
129 /*
130  * m4 data structures
131  */
132 
133 typedef struct ndblock *ndptr;
134 
135 struct macro_definition {
136 	struct macro_definition *next;
137 	char		*defn;	/* definition..               */
138 	unsigned int	type;	/* type of the entry..        */
139 };
140 
141 
142 struct ndblock {			/* hashtable structure         */
143 	unsigned int		builtin_type;
144 	unsigned int		trace_flags;
145 	struct macro_definition *d;
146 	char		name[1];	/* entry name..               */
147 };
148 
149 typedef union {			/* stack structure */
150 	int	sfra;		/* frame entry  */
151 	char	*sstr;		/* string entry */
152 } stae;
153 
154 struct input_file {
155 	FILE		*file;
156 	char		*name;
157 	unsigned long	lineno;
158 	unsigned long   synch_lineno;	/* used for -s */
159 	int		c;
160 };
161 
162 #define STORAGE_STRSPACE 0
163 #define STORAGE_MACRO 1
164 #define STORAGE_OTHER 2
165 
166 #define CURRENT_NAME	(infile[ilevel].name)
167 #define CURRENT_LINE	(infile[ilevel].lineno)
168 /*
169  * macros for readability and/or speed
170  *
171  *      gpbc()  - get a possibly pushed-back character
172  *      pushf() - push a call frame entry onto stack
173  *      pushs() - push a string pointer onto stack
174  */
175 #define gpbc()	 (bp > bufbase) ? *--bp : obtain_char(infile+ilevel)
176 #define pushf(x)			\
177 	do {				\
178 		if (++sp == STACKMAX)	\
179 			enlarge_stack();\
180 		mstack[sp].sfra = (x);	\
181 		sstack[sp] = STORAGE_OTHER; \
182 	} while (0)
183 
184 #define pushs(x)			\
185 	do {				\
186 		if (++sp == STACKMAX)	\
187 			enlarge_stack();\
188 		mstack[sp].sstr = (x);	\
189 		sstack[sp] = STORAGE_STRSPACE; \
190 	} while (0)
191 
192 #define pushs1(x)			\
193 	do {				\
194 		if (++sp == STACKMAX)	\
195 			enlarge_stack();\
196 		mstack[sp].sstr = (x);	\
197 		sstack[sp] = STORAGE_OTHER; \
198 	} while (0)
199 
200 #define pushdef(p)			\
201 	do {				\
202 		if (++sp == STACKMAX)	\
203 			enlarge_stack();\
204 		mstack[sp].sstr = macro_getdef(p)->defn;\
205 		sstack[sp] = STORAGE_MACRO; \
206 	} while (0)
207 
208 
209 /*
210  *	    .				   .
211  *	|   .	|  <-- sp		|  .  |
212  *	+-------+			+-----+
213  *	| arg 3 ----------------------->| str |
214  *	+-------+			|  .  |
215  *	| arg 2 ---PREVEP-----+		   .
216  *	+-------+	      |
217  *	    .		      |		|     |
218  *	+-------+	      |		+-----+
219  *	| plev	|  PARLEV     +-------->| str |
220  *	+-------+			|  .  |
221  *	| type	|  CALTYP		   .
222  *	+-------+
223  *	| prcf	---PREVFP--+
224  *	+-------+	   |
225  *	|   .	|  PREVSP  |
226  *	    .		   |
227  *	+-------+	   |
228  *	|	<----------+
229  *	+-------+
230  *
231  */
232 #define PARLEV  (mstack[fp].sfra)
233 #define CALTYP  (mstack[fp-2].sfra)
234 #define TRACESTATUS (mstack[fp-1].sfra)
235 #define PREVEP	(mstack[fp+3].sstr)
236 #define PREVSP	(fp-4)
237 #define PREVFP	(mstack[fp-3].sfra)
238