Jochen Pohl's lint(1) from NetBSD. Yet another import.

This is just a vendor import by now.  I'll wait until i'll get the
imported files back via CTM before applying the FreeBSD patches.
Don't use it yet.

Submitted by:	Jochen Pohl <jpo.drs@sni.de>
Obtained from:	(NetBSD -- this version is directly from Jochen)

1 files changed, 236 insertions, 0 deletions

diff --git a/usr.bin/xlint/lint2/emit2.c b/usr.bin/xlint/lint2/emit2.c
new file mode 100644
index 0000000..82527b5
--- /dev/null
+++ b/usr.bin/xlint/lint2/emit2.c
@@ -0,0 +1,236 @@
+/*	$NetBSD: emit2.c,v 1.2 1995/07/03 21:24:44 cgd Exp $	*/
+
+/*
+ * Copyright (c) 1994, 1995 Jochen Pohl
+ * All Rights Reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by Jochen Pohl for
+ *	The NetBSD Project.
+ * 4. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char rcsid[] = "$NetBSD: emit2.c,v 1.2 1995/07/03 21:24:44 cgd Exp $";
+#endif
+
+#include <err.h>
+
+#include "lint2.h"
+
+static	void	outtype __P((type_t *));
+static	void	outdef __P((hte_t *, sym_t *));
+static	void	dumpname __P((hte_t *));
+
+/*
+ * Write type into the output buffer.
+ */
+static void
+outtype(tp)
+	type_t	*tp;
+{
+	int	t, s, na;
+	tspec_t	ts;
+	type_t	**ap;
+
+	while (tp != NULL) {
+		if ((ts = tp->t_tspec) == INT && tp->t_isenum)
+			ts = ENUM;
+		switch (ts) {
+		case CHAR:	t = 'C';	s = '\0';	break;
+		case SCHAR:	t = 'C';	s = 's';	break;
+		case UCHAR:	t = 'C';	s = 'u';	break;
+		case SHORT:	t = 'S';	s = '\0';	break;
+		case USHORT:	t = 'S';	s = 'u';	break;
+		case INT:	t = 'I';	s = '\0';	break;
+		case UINT:	t = 'I';	s = 'u';	break;
+		case LONG:	t = 'L';	s = '\0';	break;
+		case ULONG:	t = 'L';	s = 'u';	break;
+		case QUAD:	t = 'Q';	s = '\0';	break;
+		case UQUAD:	t = 'Q';	s = 'u';	break;
+		case FLOAT:	t = 'D';	s = 's';	break;
+		case DOUBLE:	t = 'D';	s = '\0';	break;
+		case LDOUBLE:	t = 'D';	s = 'l';	break;
+		case VOID:	t = 'V';	s = '\0';	break;
+		case PTR:	t = 'P';	s = '\0';	break;
+		case ARRAY:	t = 'A';	s = '\0';	break;
+		case ENUM:	t = 'T';	s = 'e';	break;
+		case STRUCT:	t = 'T';	s = 's';	break;
+		case UNION:	t = 'T';	s = 'u';	break;
+		case FUNC:
+			if (tp->t_args != NULL && !tp->t_proto) {
+				t = 'f';
+			} else {
+				t = 'F';
+			}
+			s = '\0';
+			break;
+		default:
+			errx(1, "internal error: outtype() 1");
+		}
+		if (tp->t_const)
+			outchar('c');
+		if (tp->t_volatile)
+			outchar('v');
+		if (s != '\0')
+			outchar(s);
+		outchar(t);
+		if (ts == ARRAY) {
+			outint(tp->t_dim);
+		} else if (ts == ENUM || ts == STRUCT || ts == UNION) {
+			if (tp->t_istag) {
+				outint(1);
+				outname(tp->t_tag->h_name);
+			} else if (tp->t_istynam) {
+				outint(2);
+				outname(tp->t_tynam->h_name);
+			} else {
+				outint(0);
+			}
+		} else if (ts == FUNC && tp->t_args != NULL) {
+			na = 0;
+			for (ap = tp->t_args; *ap != NULL; ap++)
+				na++;
+			if (tp->t_vararg)
+				na++;
+			outint(na);
+			for (ap = tp->t_args; *ap != NULL; ap++)
+				outtype(*ap);
+			if (tp->t_vararg)
+				outchar('E');
+		}
+		tp = tp->t_subt;
+	}
+}
+
+/*
+ * Write a definition.
+ */
+static void
+outdef(hte, sym)
+	hte_t	*hte;
+	sym_t	*sym;
+{
+	/* reset output buffer */
+	outclr();
+
+	/* line number in C source file */
+	outint(0);
+
+	/* this is a definition */
+	outchar('d');
+
+	/* index of file where symbol was defined and line number of def. */
+	outint(0);
+	outchar('.');
+	outint(0);
+
+	/* flags */
+	if (sym->s_va) {
+		outchar('v');		/* varargs */
+		outint(sym->s_nva);
+	}
+	if (sym->s_scfl) {
+		outchar('S');		/* scanflike */
+		outint(sym->s_nscfl);
+	}
+	if (sym->s_prfl) {
+		outchar('P');		/* printflike */
+		outint(sym->s_nprfl);
+	}
+	/* definition or tentative definition */
+	outchar(sym->s_def == DEF ? 'd' : 't');
+	if (TP(sym->s_type)->t_tspec == FUNC) {
+		if (sym->s_rval)
+			outchar('r');	/* fkt. has return value */
+		if (sym->s_osdef)
+			outchar('o');	/* old style definition */
+	}
+	outchar('u');			/* used (no warning if not used) */
+
+	/* name */
+	outname(hte->h_name);
+
+	/* type */
+	outtype(TP(sym->s_type));
+}
+
+/*
+ * Write the first definition of a name into the lint library.
+ */
+static void
+dumpname(hte)
+	hte_t	*hte;
+{
+	sym_t	*sym, *def;
+
+	/* static and undefined symbols are not written */
+	if (hte->h_static || !hte->h_def)
+		return;
+
+	/*
+	 * If there is a definition, write it. Otherwise write a tentative
+	 * definition. This is neccessary because more than one tentative
+	 * definition is allowed (except with sflag).
+	 */
+	def = NULL;
+	for (sym = hte->h_syms; sym != NULL; sym = sym->s_nxt) {
+		if (sym->s_def == DEF) {
+			def = sym;
+			break;
+		}
+		if (sym->s_def == TDEF && def == NULL)
+			def = sym;
+	}
+	if (def == NULL)
+		errx(1, "internal error: dumpname() %s", hte->h_name);
+
+	outdef(hte, def);
+}
+
+/*
+ * Write a new lint library.
+ */
+void
+outlib(name)
+	const	char *name;
+{
+	/* Open of output file and initialisation of the output buffer */
+	outopen(name);
+
+	/* write name of lint library */
+	outsrc(name);
+
+	/* name of lint lib has index 0 */
+	outclr();
+	outint(0);
+	outchar('s');
+	outstrg(name);
+
+	/* write all definitions with external linkage */
+	forall(dumpname);
+
+	/* close the output */
+	outclose();
+}