emit2.c revision 1.2 
1/*	$NetBSD: emit2.c,v 1.2 1995/07/03 21:24:44 cgd Exp $	*/
2
3/*
4 * Copyright (c) 1994, 1995 Jochen Pohl
5 * All Rights Reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 *    must display the following acknowledgement:
17 *      This product includes software developed by Jochen Pohl for
18 *	The NetBSD Project.
19 * 4. The name of the author may not be used to endorse or promote products
20 *    derived from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34#ifndef lint
35static char rcsid[] = "$NetBSD: emit2.c,v 1.2 1995/07/03 21:24:44 cgd Exp $";
36#endif
37
38#include <err.h>
39
40#include "lint2.h"
41
42static	void	outtype __P((type_t *));
43static	void	outdef __P((hte_t *, sym_t *));
44static	void	dumpname __P((hte_t *));
45
46/*
47 * Write type into the output buffer.
48 */
49static void
50outtype(tp)
51	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 {
109				outint(0);
110			}
111		} else if (ts == FUNC && tp->t_args != NULL) {
112			na = 0;
113			for (ap = tp->t_args; *ap != NULL; ap++)
114				na++;
115			if (tp->t_vararg)
116				na++;
117			outint(na);
118			for (ap = tp->t_args; *ap != NULL; ap++)
119				outtype(*ap);
120			if (tp->t_vararg)
121				outchar('E');
122		}
123		tp = tp->t_subt;
124	}
125}
126
127/*
128 * Write a definition.
129 */
130static void
131outdef(hte, sym)
132	hte_t	*hte;
133	sym_t	*sym;
134{
135	/* reset output buffer */
136	outclr();
137
138	/* line number in C source file */
139	outint(0);
140
141	/* this is a definition */
142	outchar('d');
143
144	/* index of file where symbol was defined and line number of def. */
145	outint(0);
146	outchar('.');
147	outint(0);
148
149	/* flags */
150	if (sym->s_va) {
151		outchar('v');		/* varargs */
152		outint(sym->s_nva);
153	}
154	if (sym->s_scfl) {
155		outchar('S');		/* scanflike */
156		outint(sym->s_nscfl);
157	}
158	if (sym->s_prfl) {
159		outchar('P');		/* printflike */
160		outint(sym->s_nprfl);
161	}
162	/* definition or tentative definition */
163	outchar(sym->s_def == DEF ? 'd' : 't');
164	if (TP(sym->s_type)->t_tspec == FUNC) {
165		if (sym->s_rval)
166			outchar('r');	/* fkt. has return value */
167		if (sym->s_osdef)
168			outchar('o');	/* old style definition */
169	}
170	outchar('u');			/* used (no warning if not used) */
171
172	/* name */
173	outname(hte->h_name);
174
175	/* type */
176	outtype(TP(sym->s_type));
177}
178
179/*
180 * Write the first definition of a name into the lint library.
181 */
182static void
183dumpname(hte)
184	hte_t	*hte;
185{
186	sym_t	*sym, *def;
187
188	/* static and undefined symbols are not written */
189	if (hte->h_static || !hte->h_def)
190		return;
191
192	/*
193	 * If there is a definition, write it. Otherwise write a tentative
194	 * definition. This is neccessary because more than one tentative
195	 * definition is allowed (except with sflag).
196	 */
197	def = NULL;
198	for (sym = hte->h_syms; sym != NULL; sym = sym->s_nxt) {
199		if (sym->s_def == DEF) {
200			def = sym;
201			break;
202		}
203		if (sym->s_def == TDEF && def == NULL)
204			def = sym;
205	}
206	if (def == NULL)
207		errx(1, "internal error: dumpname() %s", hte->h_name);
208
209	outdef(hte, def);
210}
211
212/*
213 * Write a new lint library.
214 */
215void
216outlib(name)
217	const	char *name;
218{
219	/* Open of output file and initialisation of the output buffer */
220	outopen(name);
221
222	/* write name of lint library */
223	outsrc(name);
224
225	/* name of lint lib has index 0 */
226	outclr();
227	outint(0);
228	outchar('s');
229	outstrg(name);
230
231	/* write all definitions with external linkage */
232	forall(dumpname);
233
234	/* close the output */
235	outclose();
236}
237