emit2.c revision 1.9 
1/* $NetBSD: emit2.c,v 1.9 2002/01/31 19:36:55 tv 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#if defined(__RCSID) && !defined(lint)
37__RCSID("$NetBSD: emit2.c,v 1.9 2002/01/31 19:36:55 tv Exp $");
38#endif
39
40#include "lint2.h"
41
42static	void	outtype(type_t *);
43static	void	outdef(hte_t *, sym_t *);
44static	void	dumpname(hte_t *);
45static	void	outfiles(void);
46
47/*
48 * Write type into the output buffer.
49 */
50static void
51outtype(type_t *tp)
52{
53	int	t, s, na;
54	tspec_t	ts;
55	type_t	**ap;
56
57	while (tp != NULL) {
58		if ((ts = tp->t_tspec) == INT && tp->t_isenum)
59			ts = ENUM;
60		switch (ts) {
61		case CHAR:	t = 'C';	s = '\0';	break;
62		case SCHAR:	t = 'C';	s = 's';	break;
63		case UCHAR:	t = 'C';	s = 'u';	break;
64		case SHORT:	t = 'S';	s = '\0';	break;
65		case USHORT:	t = 'S';	s = 'u';	break;
66		case INT:	t = 'I';	s = '\0';	break;
67		case UINT:	t = 'I';	s = 'u';	break;
68		case LONG:	t = 'L';	s = '\0';	break;
69		case ULONG:	t = 'L';	s = 'u';	break;
70		case QUAD:	t = 'Q';	s = '\0';	break;
71		case UQUAD:	t = 'Q';	s = 'u';	break;
72		case FLOAT:	t = 'D';	s = 's';	break;
73		case DOUBLE:	t = 'D';	s = '\0';	break;
74		case LDOUBLE:	t = 'D';	s = 'l';	break;
75		case VOID:	t = 'V';	s = '\0';	break;
76		case PTR:	t = 'P';	s = '\0';	break;
77		case ARRAY:	t = 'A';	s = '\0';	break;
78		case ENUM:	t = 'T';	s = 'e';	break;
79		case STRUCT:	t = 'T';	s = 's';	break;
80		case UNION:	t = 'T';	s = 'u';	break;
81		case FUNC:
82			if (tp->t_args != NULL && !tp->t_proto) {
83				t = 'f';
84			} else {
85				t = 'F';
86			}
87			s = '\0';
88			break;
89		default:
90			errx(1, "internal error: outtype() 1");
91		}
92		if (tp->t_const)
93			outchar('c');
94		if (tp->t_volatile)
95			outchar('v');
96		if (s != '\0')
97			outchar(s);
98		outchar(t);
99		if (ts == ARRAY) {
100			outint(tp->t_dim);
101		} else if (ts == ENUM || ts == STRUCT || ts == UNION) {
102			if (tp->t_istag) {
103				outint(1);
104				outname(tp->t_tag->h_name);
105			} else if (tp->t_istynam) {
106				outint(2);
107				outname(tp->t_tynam->h_name);
108			} else if (tp->t_isuniqpos) {
109				outint(3);
110				outint(tp->t_uniqpos.p_line);
111				outchar('.');
112				outint(tp->t_uniqpos.p_file);
113				outchar('.');
114				outint(tp->t_uniqpos.p_uniq);
115			} else
116				errx(1, "internal error: outtype() 2");
117		} else if (ts == FUNC && tp->t_args != NULL) {
118			na = 0;
119			for (ap = tp->t_args; *ap != NULL; ap++)
120				na++;
121			if (tp->t_vararg)
122				na++;
123			outint(na);
124			for (ap = tp->t_args; *ap != NULL; ap++)
125				outtype(*ap);
126			if (tp->t_vararg)
127				outchar('E');
128		}
129		tp = tp->t_subt;
130	}
131}
132
133/*
134 * Write a definition.
135 */
136static void
137outdef(hte_t *hte, sym_t *sym)
138{
139
140	/* reset output buffer */
141	outclr();
142
143	/* line number in C source file */
144	outint(0);
145
146	/* this is a definition */
147	outchar('d');
148
149	/* index of file where symbol was defined and line number of def. */
150	outint(0);
151	outchar('.');
152	outint(0);
153
154	/* flags */
155	if (sym->s_va) {
156		outchar('v');		/* varargs */
157		outint(sym->s_nva);
158	}
159	if (sym->s_scfl) {
160		outchar('S');		/* scanflike */
161		outint(sym->s_nscfl);
162	}
163	if (sym->s_prfl) {
164		outchar('P');		/* printflike */
165		outint(sym->s_nprfl);
166	}
167	/* definition or tentative definition */
168	outchar(sym->s_def == DEF ? 'd' : 't');
169	if (TP(sym->s_type)->t_tspec == FUNC) {
170		if (sym->s_rval)
171			outchar('r');	/* fkt. has return value */
172		if (sym->s_osdef)
173			outchar('o');	/* old style definition */
174	}
175	outchar('u');			/* used (no warning if not used) */
176
177	/* name */
178	outname(hte->h_name);
179
180	/* type */
181	outtype(TP(sym->s_type));
182}
183
184/*
185 * Write the first definition of a name into the lint library.
186 */
187static void
188dumpname(hte_t *hte)
189{
190	sym_t	*sym, *def;
191
192	/* static and undefined symbols are not written */
193	if (hte->h_static || !hte->h_def)
194		return;
195
196	/*
197	 * If there is a definition, write it. Otherwise write a tentative
198	 * definition. This is necessary because more than one tentative
199	 * definition is allowed (except with sflag).
200	 */
201	def = NULL;
202	for (sym = hte->h_syms; sym != NULL; sym = sym->s_nxt) {
203		if (sym->s_def == DEF) {
204			def = sym;
205			break;
206		}
207		if (sym->s_def == TDEF && def == NULL)
208			def = sym;
209	}
210	if (def == NULL)
211		errx(1, "internal error: dumpname() %s", hte->h_name);
212
213	outdef(hte, def);
214}
215
216/*
217 * Write a new lint library.
218 */
219void
220outlib(const char *name)
221{
222	/* Open of output file and initialisation of the output buffer */
223	outopen(name);
224
225	/* write name of lint library */
226	outsrc(name);
227
228	/* name of lint lib has index 0 */
229	outclr();
230	outint(0);
231	outchar('s');
232	outstrg(name);
233
234	/*
235	 * print the names of all files references by unnamed
236	 * struct/union/enum declarations.
237	 */
238	outfiles();
239
240	/* write all definitions with external linkage */
241	forall(dumpname);
242
243	/* close the output */
244	outclose();
245}
246
247/*
248 * Write out the name of a file referenced by a type.
249 */
250struct outflist {
251	short		ofl_num;
252	struct outflist *ofl_next;
253};
254static struct outflist *outflist;
255
256int
257addoutfile(short num)
258{
259	struct outflist *ofl, **pofl;
260	int i;
261
262	ofl = outflist;
263	pofl = &outflist;
264	i = 1;				/* library is 0 */
265
266	while (ofl != NULL) {
267		if (ofl->ofl_num == num)
268			break;
269
270		pofl = &ofl->ofl_next;
271		ofl = ofl->ofl_next;
272		i++;
273	}
274
275	if (ofl == NULL) {
276		ofl = *pofl = xmalloc(sizeof (struct outflist));
277		ofl->ofl_num = num;
278		ofl->ofl_next = NULL;
279	}
280	return (i);
281}
282
283static void
284outfiles(void)
285{
286	struct outflist *ofl;
287	int i;
288
289	for (ofl = outflist, i = 1; ofl != NULL; ofl = ofl->ofl_next, i++) {
290		/* reset output buffer */
291		outclr();
292
293		outint(i);
294		outchar('s');
295		outstrg(fnames[ofl->ofl_num]);
296	}
297}
298