emit2.c revision 1.5 
1/* $NetBSD: emit2.c,v 1.5 2000/06/14 06:49:23 cgd Exp $ */
2
3/*
4 * Copyright (c) 1996 Christopher G. Demetriou.  All Rights Reserved.
5 * Copyright (c) 1994, 1995 Jochen Pohl
6 * All Rights Reserved.
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. All advertising materials mentioning features or use of this software
17 *    must display the following acknowledgement:
18 *      This product includes software developed by Jochen Pohl for
19 *	The NetBSD Project.
20 * 4. The name of the author may not be used to endorse or promote products
21 *    derived from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 */
34
35#include <sys/cdefs.h>
36#ifndef lint
37__RCSID("$NetBSD: emit2.c,v 1.5 2000/06/14 06:49:23 cgd Exp $");
38#endif
39
40#include <err.h>
41
42#include "lint2.h"
43
44static	void	outtype __P((type_t *));
45static	void	outdef __P((hte_t *, sym_t *));
46static	void	dumpname __P((hte_t *));
47static	void	outfiles __P((void));
48
49/*
50 * Write type into the output buffer.
51 */
52static void
53outtype(tp)
54	type_t	*tp;
55{
56	int	t, s, na;
57	tspec_t	ts;
58	type_t	**ap;
59
60	while (tp != NULL) {
61		if ((ts = tp->t_tspec) == INT && tp->t_isenum)
62			ts = ENUM;
63		switch (ts) {
64		case CHAR:	t = 'C';	s = '\0';	break;
65		case SCHAR:	t = 'C';	s = 's';	break;
66		case UCHAR:	t = 'C';	s = 'u';	break;
67		case SHORT:	t = 'S';	s = '\0';	break;
68		case USHORT:	t = 'S';	s = 'u';	break;
69		case INT:	t = 'I';	s = '\0';	break;
70		case UINT:	t = 'I';	s = 'u';	break;
71		case LONG:	t = 'L';	s = '\0';	break;
72		case ULONG:	t = 'L';	s = 'u';	break;
73		case QUAD:	t = 'Q';	s = '\0';	break;
74		case UQUAD:	t = 'Q';	s = 'u';	break;
75		case FLOAT:	t = 'D';	s = 's';	break;
76		case DOUBLE:	t = 'D';	s = '\0';	break;
77		case LDOUBLE:	t = 'D';	s = 'l';	break;
78		case VOID:	t = 'V';	s = '\0';	break;
79		case PTR:	t = 'P';	s = '\0';	break;
80		case ARRAY:	t = 'A';	s = '\0';	break;
81		case ENUM:	t = 'T';	s = 'e';	break;
82		case STRUCT:	t = 'T';	s = 's';	break;
83		case UNION:	t = 'T';	s = 'u';	break;
84		case FUNC:
85			if (tp->t_args != NULL && !tp->t_proto) {
86				t = 'f';
87			} else {
88				t = 'F';
89			}
90			s = '\0';
91			break;
92		default:
93			errx(1, "internal error: outtype() 1");
94		}
95		if (tp->t_const)
96			outchar('c');
97		if (tp->t_volatile)
98			outchar('v');
99		if (s != '\0')
100			outchar(s);
101		outchar(t);
102		if (ts == ARRAY) {
103			outint(tp->t_dim);
104		} else if (ts == ENUM || ts == STRUCT || ts == UNION) {
105			if (tp->t_istag) {
106				outint(1);
107				outname(tp->t_tag->h_name);
108			} else if (tp->t_istynam) {
109				outint(2);
110				outname(tp->t_tynam->h_name);
111			} else if (tp->t_isuniqpos) {
112				outint(3);
113				outint(tp->t_uniqpos.p_line);
114				outchar('.');
115				outint(tp->t_uniqpos.p_file);
116				outchar('.');
117				outint(tp->t_uniqpos.p_uniq);
118			} else
119				errx(1, "internal error: outtype() 2");
120		} else if (ts == FUNC && tp->t_args != NULL) {
121			na = 0;
122			for (ap = tp->t_args; *ap != NULL; ap++)
123				na++;
124			if (tp->t_vararg)
125				na++;
126			outint(na);
127			for (ap = tp->t_args; *ap != NULL; ap++)
128				outtype(*ap);
129			if (tp->t_vararg)
130				outchar('E');
131		}
132		tp = tp->t_subt;
133	}
134}
135
136/*
137 * Write a definition.
138 */
139static void
140outdef(hte, sym)
141	hte_t	*hte;
142	sym_t	*sym;
143{
144	/* reset output buffer */
145	outclr();
146
147	/* line number in C source file */
148	outint(0);
149
150	/* this is a definition */
151	outchar('d');
152
153	/* index of file where symbol was defined and line number of def. */
154	outint(0);
155	outchar('.');
156	outint(0);
157
158	/* flags */
159	if (sym->s_va) {
160		outchar('v');		/* varargs */
161		outint(sym->s_nva);
162	}
163	if (sym->s_scfl) {
164		outchar('S');		/* scanflike */
165		outint(sym->s_nscfl);
166	}
167	if (sym->s_prfl) {
168		outchar('P');		/* printflike */
169		outint(sym->s_nprfl);
170	}
171	/* definition or tentative definition */
172	outchar(sym->s_def == DEF ? 'd' : 't');
173	if (TP(sym->s_type)->t_tspec == FUNC) {
174		if (sym->s_rval)
175			outchar('r');	/* fkt. has return value */
176		if (sym->s_osdef)
177			outchar('o');	/* old style definition */
178	}
179	outchar('u');			/* used (no warning if not used) */
180
181	/* name */
182	outname(hte->h_name);
183
184	/* type */
185	outtype(TP(sym->s_type));
186}
187
188/*
189 * Write the first definition of a name into the lint library.
190 */
191static void
192dumpname(hte)
193	hte_t	*hte;
194{
195	sym_t	*sym, *def;
196
197	/* static and undefined symbols are not written */
198	if (hte->h_static || !hte->h_def)
199		return;
200
201	/*
202	 * If there is a definition, write it. Otherwise write a tentative
203	 * definition. This is neccessary because more than one tentative
204	 * definition is allowed (except with sflag).
205	 */
206	def = NULL;
207	for (sym = hte->h_syms; sym != NULL; sym = sym->s_nxt) {
208		if (sym->s_def == DEF) {
209			def = sym;
210			break;
211		}
212		if (sym->s_def == TDEF && def == NULL)
213			def = sym;
214	}
215	if (def == NULL)
216		errx(1, "internal error: dumpname() %s", hte->h_name);
217
218	outdef(hte, def);
219}
220
221/*
222 * Write a new lint library.
223 */
224void
225outlib(name)
226	const	char *name;
227{
228	/* Open of output file and initialisation of the output buffer */
229	outopen(name);
230
231	/* write name of lint library */
232	outsrc(name);
233
234	/* name of lint lib has index 0 */
235	outclr();
236	outint(0);
237	outchar('s');
238	outstrg(name);
239
240	/*
241	 * print the names of all files references by unnamed
242	 * struct/union/enum declarations.
243	 */
244	outfiles();
245
246	/* write all definitions with external linkage */
247	forall(dumpname);
248
249	/* close the output */
250	outclose();
251}
252
253/*
254 * Write out the name of a file referenced by a type.
255 */
256struct outflist {
257	short ofl_num;
258	struct outflist *ofl_next;
259};
260static struct outflist *outflist;
261
262int
263addoutfile(num)
264	short num;
265{
266	struct outflist *ofl, **pofl;
267	int i;
268
269	ofl = outflist;
270	pofl = &outflist;
271	i = 1;				/* library is 0 */
272
273	while (ofl != NULL) {
274		if (ofl->ofl_num == num)
275			break;
276
277		pofl = &ofl->ofl_next;
278		ofl = ofl->ofl_next;
279		i++;
280	}
281
282	if (ofl == NULL) {
283		ofl = *pofl = xmalloc(sizeof (struct outflist));
284		ofl->ofl_num = num;
285		ofl->ofl_next = NULL;
286	}
287	return (i);
288}
289
290static void
291outfiles()
292{
293	struct outflist *ofl;
294	int i;
295
296	for (ofl = outflist, i = 1; ofl != NULL; ofl = ofl->ofl_next, i++) {
297		/* reset output buffer */
298		outclr();
299
300		outint(i);
301		outchar('s');
302		outstrg(fnames[ofl->ofl_num]);
303	}
304}
305