xref: /dragonfly/usr.bin/m4/extern.h (revision 1de703da)
1 /*	$OpenBSD: extern.h,v 1.29 2002/02/16 21:27:48 millert Exp $	*/
2 /*	$NetBSD: extern.h,v 1.3 1996/01/13 23:25:24 pk Exp $	*/
3 
4 /*-
5  * Copyright (c) 1991, 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. All advertising materials mentioning features or use of this software
20  *    must display the following acknowledgement:
21  *	This product includes software developed by the University of
22  *	California, Berkeley and its contributors.
23  * 4. Neither the name of the University nor the names of its contributors
24  *    may be used to endorse or promote products derived from this software
25  *    without specific prior written permission.
26  *
27  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37  * SUCH DAMAGE.
38  *
39  *	@(#)extern.h	8.1 (Berkeley) 6/6/93
40  * $FreeBSD: src/usr.bin/m4/extern.h,v 1.3.6.3 2002/07/15 02:06:15 jmallett Exp $
41  * $DragonFly: src/usr.bin/m4/extern.h,v 1.2 2003/06/17 04:29:28 dillon Exp $
42  */
43 
44 /* eval.c */
45 extern void	eval(const char *[], int, int);
46 extern void	dodefine(const char *, const char *);
47 extern unsigned long expansion_id;
48 
49 /* expr.c */
50 extern int	expr(const char *);
51 
52 /* gnum4.c */
53 extern void 	addtoincludepath(const char *);
54 extern struct input_file *fopen_trypath(struct input_file *, const char *);
55 extern void doindir(const char *[], int);
56 extern void dobuiltin(const char *[], int);
57 extern void dopatsubst(const char *[], int);
58 extern void doregexp(const char *[], int);
59 
60 extern void doprintlineno(struct input_file *);
61 extern void doprintfilename(struct input_file *);
62 
63 extern void doesyscmd(const char *);
64 
65 
66 /* look.c */
67 extern ndptr	addent(const char *);
68 extern unsigned	hash(const char *);
69 extern ndptr	lookup(const char *);
70 extern void	remhash(const char *, int);
71 
72 /* main.c */
73 extern void outputstr(const char *);
74 extern int builtin_type(const char *);
75 extern const char *builtin_realname(int);
76 extern void emitline(void);
77 
78 /* misc.c */
79 extern void	chrsave(int);
80 extern char 	*compute_prevep(void);
81 extern void	getdiv(int);
82 extern ptrdiff_t indx(const char *, const char *);
83 extern void 	initspaces(void);
84 extern void	killdiv(void);
85 extern void	onintr(int);
86 extern void	pbnum(int);
87 extern void	pbunsigned(unsigned long);
88 extern void	pbstr(const char *);
89 extern void	putback(int);
90 extern void	*xalloc(size_t);
91 extern char	*xstrdup(const char *);
92 extern void	usage(void);
93 extern void	resizedivs(int);
94 extern size_t	buffer_mark(void);
95 extern void	dump_buffer(FILE *, size_t);
96 
97 extern int 	obtain_char(struct input_file *);
98 extern void	set_input(struct input_file *, FILE *, const char *);
99 extern void	release_input(struct input_file *);
100 
101 /* speeded-up versions of chrsave/putback */
102 #define PUTBACK(c)				\
103 	do {					\
104 		if (bp >= endpbb)		\
105 			enlarge_bufspace();	\
106 		*bp++ = (c);			\
107 	} while(0)
108 
109 #define CHRSAVE(c)				\
110 	do {					\
111 		if (ep >= endest)		\
112 			enlarge_strspace();	\
113 		*ep++ = (c);			\
114 	} while(0)
115 
116 /* and corresponding exposure for local symbols */
117 extern void enlarge_bufspace(void);
118 extern void enlarge_strspace(void);
119 extern char *endpbb;
120 extern char *endest;
121 
122 /* trace.c */
123 extern void mark_traced(const char *, int);
124 extern int is_traced(const char *);
125 extern void trace_file(const char *);
126 extern ssize_t trace(const char **, int, struct input_file *);
127 extern void finish_trace(size_t);
128 extern int traced_macros;
129 extern void set_trace_flags(const char *);
130 extern FILE *traceout;
131 
132 extern ndptr hashtab[];		/* hash table for macros etc. */
133 extern stae *mstack;		/* stack of m4 machine */
134 extern char *sstack;		/* shadow stack, for string space extension */
135 extern FILE *active;		/* active output file pointer */
136 extern struct input_file infile[];/* input file stack (0=stdin) */
137 extern char *inname[];		/* names of these input files */
138 extern int inlineno[];		/* current number in each input file */
139 extern FILE **outfile;		/* diversion array(0=bitbucket) */
140 extern int maxout;		/* maximum number of diversions */
141 extern int fp; 			/* m4 call frame pointer */
142 extern int ilevel;		/* input file stack pointer */
143 extern int oindex;		/* diversion index. */
144 extern int sp;			/* current m4 stack pointer */
145 extern char *bp;		/* first available character */
146 extern char *buf;		/* push-back buffer */
147 extern char *bufbase;		/* buffer base for this ilevel */
148 extern char *bbase[];		/* buffer base per ilevel */
149 extern char ecommt[MAXCCHARS+1];/* end character for comment */
150 extern char *ep;		/* first free char in strspace */
151 extern char lquote[MAXCCHARS+1];/* left quote character (`) */
152 extern const char *m4wraps;	/* m4wrap string default. */
153 extern const char *null;	/* as it says.. just a null. */
154 extern char rquote[MAXCCHARS+1];/* right quote character (') */
155 extern char scommt[MAXCCHARS+1];/* start character for comment */
156 extern int synccpp;		/* Line synchronisation for C preprocessor */
157 
158 extern int mimic_gnu;		/* behaves like gnu-m4 */
159 
160 /* get a possibly pushed-back-character, increment lineno if need be */
161 static __inline int gpbc(void)
162 {
163 	int chscratch;		/* Scratch space. */
164 
165 	if (bp > bufbase) {
166 		if (*--bp)
167 			return ((unsigned char)*bp);
168 		else
169 			return (EOF);
170 	}
171 	chscratch = obtain_char(infile+ilevel);
172 	if (chscratch == '\n')
173 		++inlineno[ilevel];
174 	return (chscratch);
175 }
176