emit2.c revision 1.13 
1/* $NetBSD: emit2.c,v 1.13 2008/09/26 22:52:24 matt 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 1.13 2008/09/26 22:52:24 matt 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 BOOL:	t = 'B';	s = '\0';	break;
62		case CHAR:	t = 'C';	s = '\0';	break;
63		case SCHAR:	t = 'C';	s = 's';	break;
64		case UCHAR:	t = 'C';	s = 'u';	break;
65		case SHORT:	t = 'S';	s = '\0';	break;
66		case USHORT:	t = 'S';	s = 'u';	break;
67		case INT:	t = 'I';	s = '\0';	break;
68		case UINT:	t = 'I';	s = 'u';	break;
69		case LONG:	t = 'L';	s = '\0';	break;
70		case ULONG:	t = 'L';	s = 'u';	break;
71		case QUAD:	t = 'Q';	s = '\0';	break;
72		case UQUAD:	t = 'Q';	s = 'u';	break;
73		case FLOAT:	t = 'D';	s = 's';	break;
74		case DOUBLE:	t = 'D';	s = '\0';	break;
75		case LDOUBLE:	t = 'D';	s = 'l';	break;
76		case VOID:	t = 'V';	s = '\0';	break;
77		case PTR:	t = 'P';	s = '\0';	break;
78		case ARRAY:	t = 'A';	s = '\0';	break;
79		case ENUM:	t = 'T';	s = 'e';	break;
80		case STRUCT:	t = 'T';	s = 's';	break;
81		case UNION:	t = 'T';	s = 'u';	break;
82		case FCOMPLEX:	t = 'X';	s = 's';	break;
83		case DCOMPLEX:	t = 'X';	s = '\0';	break;
84		case LCOMPLEX:	t = 'X';	s = 'l';	break;
85		case FUNC:
86			if (tp->t_args != NULL && !tp->t_proto) {
87				t = 'f';
88			} else {
89				t = 'F';
90			}
91			s = '\0';
92			break;
93		default:
94			errx(1, "internal error: outtype() 1");
95		}
96		if (tp->t_const)
97			outchar('c');
98		if (tp->t_volatile)
99			outchar('v');
100		if (s != '\0')
101			outchar(s);
102		outchar(t);
103		if (ts == ARRAY) {
104			outint(tp->t_dim);
105		} else if (ts == ENUM || ts == STRUCT || ts == UNION) {
106			if (tp->t_istag) {
107				outint(1);
108				outname(tp->t_tag->h_name);
109			} else if (tp->t_istynam) {
110				outint(2);
111				outname(tp->t_tynam->h_name);
112			} else if (tp->t_isuniqpos) {
113				outint(3);
114				outint(tp->t_uniqpos.p_line);
115				outchar('.');
116				outint(tp->t_uniqpos.p_file);
117				outchar('.');
118				outint(tp->t_uniqpos.p_uniq);
119			} else
120				errx(1, "internal error: outtype() 2");
121		} else if (ts == FUNC && tp->t_args != NULL) {
122			na = 0;
123			for (ap = tp->t_args; *ap != NULL; ap++)
124				na++;
125			if (tp->t_vararg)
126				na++;
127			outint(na);
128			for (ap = tp->t_args; *ap != NULL; ap++)
129				outtype(*ap);
130			if (tp->t_vararg)
131				outchar('E');
132		}
133		tp = tp->t_subt;
134	}
135}
136
137/*
138 * Write a definition.
139 */
140static void
141outdef(hte_t *hte, sym_t *sym)
142{
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_t *hte)
193{
194	sym_t	*sym, *def;
195
196	/* static and undefined symbols are not written */
197	if (hte->h_static || !hte->h_def)
198		return;
199
200	/*
201	 * If there is a definition, write it. Otherwise write a tentative
202	 * definition. This is necessary because more than one tentative
203	 * definition is allowed (except with sflag).
204	 */
205	def = NULL;
206	for (sym = hte->h_syms; sym != NULL; sym = sym->s_nxt) {
207		if (sym->s_def == DEF) {
208			def = sym;
209			break;
210		}
211		if (sym->s_def == TDEF && def == NULL)
212			def = sym;
213	}
214	if (def == NULL)
215		errx(1, "internal error: dumpname() %s", hte->h_name);
216
217	outdef(hte, def);
218}
219
220/*
221 * Write a new lint library.
222 */
223void
224outlib(const char *name)
225{
226	/* Open of output file and initialisation of the output buffer */
227	outopen(name);
228
229	/* write name of lint library */
230	outsrc(name);
231
232	/* name of lint lib has index 0 */
233	outclr();
234	outint(0);
235	outchar('s');
236	outstrg(name);
237
238	/*
239	 * print the names of all files references by unnamed
240	 * struct/union/enum declarations.
241	 */
242	outfiles();
243
244	/* write all definitions with external linkage */
245	forall(dumpname);
246
247	/* close the output */
248	outclose();
249}
250
251/*
252 * Write out the name of a file referenced by a type.
253 */
254struct outflist {
255	short		ofl_num;
256	struct outflist *ofl_next;
257};
258static struct outflist *outflist;
259
260int
261addoutfile(short num)
262{
263	struct outflist *ofl, **pofl;
264	int i;
265
266	ofl = outflist;
267	pofl = &outflist;
268	i = 1;				/* library is 0 */
269
270	while (ofl != NULL) {
271		if (ofl->ofl_num == num)
272			break;
273
274		pofl = &ofl->ofl_next;
275		ofl = ofl->ofl_next;
276		i++;
277	}
278
279	if (ofl == NULL) {
280		ofl = *pofl = xmalloc(sizeof (struct outflist));
281		ofl->ofl_num = num;
282		ofl->ofl_next = NULL;
283	}
284	return (i);
285}
286
287static void
288outfiles(void)
289{
290	struct outflist *ofl;
291	int i;
292
293	for (ofl = outflist, i = 1; ofl != NULL; ofl = ofl->ofl_next, i++) {
294		/* reset output buffer */
295		outclr();
296
297		outint(i);
298		outchar('s');
299		outstrg(fnames[ofl->ofl_num]);
300	}
301}
302