1/*	$NetBSD: msg.c,v 1.25 2023/12/03 18:17:41 rillig 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#if HAVE_NBTOOL_CONFIG_H
35#include "nbtool_config.h"
36#endif
37
38#include <sys/cdefs.h>
39#if defined(__RCSID)
40__RCSID("$NetBSD: msg.c,v 1.25 2023/12/03 18:17:41 rillig Exp $");
41#endif
42
43#include <stdarg.h>
44#include <stdio.h>
45#include <string.h>
46
47#include "lint2.h"
48
49static const	char *msgs[] = {
50	"%s used( %s ), but not defined",			      /* 0 */
51	"%s defined( %s ), but never used",			      /* 1 */
52	"%s declared( %s ), but never used or defined",		      /* 2 */
53	"%s multiply defined  \t%s  ::  %s",			      /* 3 */
54	"%s value used inconsistently  \t%s  ::  %s",		      /* 4 */
55	"%s value declared inconsistently (%s != %s) \t%s  ::  %s",   /* 5 */
56	"%s, arg %d used inconsistently  \t%s[%s]  ::  %s[%s]",	      /* 6 */
57	"%s: variable # of args  \t%s  ::  %s",			      /* 7 */
58	"%s returns value which is always ignored",		      /* 8 */
59	"%s returns value which is sometimes ignored",		      /* 9 */
60	"%s value is used( %s ), but none returned",		      /* 10 */
61	"%s, arg %d declared inconsistently (%s != %s)\t%s :: %s",    /* 11 */
62	"%s: variable # of args declared  \t%s  ::  %s",	      /* 12 */
63	"%s: malformed format string  \t%s",			      /* 13 */
64	"%s, arg %d inconsistent with format  \t%s",		      /* 14 */
65	"%s: too few args for format  \t%s",			      /* 15 */
66	"%s: too many args for format  \t%s",			      /* 16 */
67	"%s function value must be declared before use  \t%s  ::  %s",/* 17 */
68	"%s renamed multiple times  \t%s  ::  %s",		      /* 18 */
69};
70
71void
72msg(int n, ...)
73{
74	va_list ap;
75
76	va_start(ap, n);
77
78	(void)vprintf(msgs[n], ap);
79	(void)printf("\n");
80
81	va_end(ap);
82}
83
84/*
85 * Return a pointer to the last component of a path.
86 */
87static const char *
88lbasename(const char *path)
89{
90
91	if (Fflag)
92		return path;
93
94	const char *base = path;
95	for (const char *p = path; *p != '\0'; p++)
96		if (*p == '/')
97			base = p + 1;
98	return base;
99}
100
101/*
102 * Create a string which describes a position in a source file.
103 */
104const char *
105mkpos(const pos_t *posp)
106{
107	static struct buffer {
108		char *buf;
109		size_t cap;
110	} buffers[2];
111	static unsigned int buf_index;
112
113	struct buffer *buf = buffers + buf_index;
114	buf_index ^= 1;
115
116	int filename;
117	int lineno;
118	if (Hflag && posp->p_src != posp->p_isrc) {
119		filename = posp->p_isrc;
120		lineno = posp->p_iline;
121	} else {
122		filename = posp->p_src;
123		lineno = posp->p_line;
124	}
125
126	bool qm = !Hflag && posp->p_src != posp->p_isrc;
127	const char *fn = lbasename(fnames[filename]);
128	size_t len = strlen(fn) + 1 + 1 + 3 * sizeof(int) + 1 + 1;
129
130	if (len > buf->cap)
131		buf->buf = xrealloc(buf->buf, buf->cap = len);
132	if (lineno != 0)
133		(void)snprintf(buf->buf, buf->cap, "%s%s(%d)",
134		    fn, qm ? "?" : "", lineno);
135	else
136		(void)snprintf(buf->buf, buf->cap, "%s", fn);
137
138	return buf->buf;
139}
140