1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1989, 1993
5 * The Regents of the University of California. 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. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #ifndef lint
33 static const char sccsid[] = "@(#)conv.c 8.1 (Berkeley) 6/6/93";
34 #endif /* not lint */
35 #include <sys/cdefs.h>
36 #include <sys/types.h>
37
38 #include <assert.h>
39 #include <ctype.h>
40 #include <limits.h>
41 #include <stdio.h>
42 #include <stdlib.h>
43 #include <string.h>
44 #include <wchar.h>
45 #include <wctype.h>
46 #include "hexdump.h"
47
48 void
conv_c(PR * pr,u_char * p,size_t bufsize)49 conv_c(PR *pr, u_char *p, size_t bufsize)
50 {
51 char buf[10];
52 char const *str;
53 wchar_t wc;
54 size_t clen, oclen;
55 int converr, pad, width;
56 u_char peekbuf[MB_LEN_MAX];
57 u_char *op;
58
59 op = NULL;
60
61 if (pr->mbleft > 0) {
62 str = "**";
63 pr->mbleft--;
64 goto strpr;
65 }
66
67 switch(*p) {
68 case '\0':
69 str = "\\0";
70 goto strpr;
71 /* case '\a': */
72 case '\007':
73 str = "\\a";
74 goto strpr;
75 case '\b':
76 str = "\\b";
77 goto strpr;
78 case '\f':
79 str = "\\f";
80 goto strpr;
81 case '\n':
82 str = "\\n";
83 goto strpr;
84 case '\r':
85 str = "\\r";
86 goto strpr;
87 case '\t':
88 str = "\\t";
89 goto strpr;
90 case '\v':
91 str = "\\v";
92 goto strpr;
93 default:
94 break;
95 }
96 /*
97 * Multibyte characters are disabled for hexdump(1) for backwards
98 * compatibility and consistency (none of its other output formats
99 * recognize them correctly).
100 */
101 converr = 0;
102 if (odmode && MB_CUR_MAX > 1) {
103 oclen = 0;
104 retry:
105 clen = mbrtowc(&wc, p, bufsize, &pr->mbstate);
106 if (clen == 0)
107 clen = 1;
108 else if (clen == (size_t)-1 || (clen == (size_t)-2 &&
109 p == peekbuf)) {
110 memset(&pr->mbstate, 0, sizeof(pr->mbstate));
111 if (p == peekbuf) {
112 /*
113 * We peeked ahead, but that didn't help --
114 * we either got an illegal sequence or still
115 * can't complete; restore original character.
116 */
117 oclen = 0;
118 p = op;
119 }
120 wc = *p;
121 clen = 1;
122 converr = 1;
123 } else if (clen == (size_t)-2) {
124 /*
125 * Incomplete character; peek ahead and see if we
126 * can complete it.
127 */
128 oclen = bufsize;
129 op = p;
130 bufsize = peek(p = peekbuf, MB_CUR_MAX);
131 goto retry;
132 }
133 clen += oclen;
134 } else {
135 wc = *p;
136 clen = 1;
137 }
138 if (!converr && iswprint(wc)) {
139 if (!odmode) {
140 *pr->cchar = 'c';
141 (void)printf(pr->fmt, (int)wc);
142 } else {
143 *pr->cchar = 'C';
144 assert(strcmp(pr->fmt, "%3C") == 0);
145 width = wcwidth(wc);
146 assert(width >= 0);
147 pad = 3 - width;
148 if (pad < 0)
149 pad = 0;
150 (void)printf("%*s%C", pad, "", wc);
151 pr->mbleft = clen - 1;
152 }
153 } else {
154 (void)sprintf(buf, "%03o", (int)*p);
155 str = buf;
156 strpr: *pr->cchar = 's';
157 (void)printf(pr->fmt, str);
158 }
159 }
160
161 void
conv_u(PR * pr,u_char * p)162 conv_u(PR *pr, u_char *p)
163 {
164 static char const * list[] = {
165 "nul", "soh", "stx", "etx", "eot", "enq", "ack", "bel",
166 "bs", "ht", "lf", "vt", "ff", "cr", "so", "si",
167 "dle", "dc1", "dc2", "dc3", "dc4", "nak", "syn", "etb",
168 "can", "em", "sub", "esc", "fs", "gs", "rs", "us",
169 };
170
171 /* od used nl, not lf */
172 if (*p <= 0x1f) {
173 *pr->cchar = 's';
174 if (odmode && *p == 0x0a)
175 (void)printf(pr->fmt, "nl");
176 else
177 (void)printf(pr->fmt, list[*p]);
178 } else if (*p == 0x7f) {
179 *pr->cchar = 's';
180 (void)printf(pr->fmt, "del");
181 } else if (odmode && *p == 0x20) { /* od replaced space with sp */
182 *pr->cchar = 's';
183 (void)printf(pr->fmt, " sp");
184 } else if (isprint(*p)) {
185 *pr->cchar = 'c';
186 (void)printf(pr->fmt, *p);
187 } else {
188 *pr->cchar = 'x';
189 (void)printf(pr->fmt, (int)*p);
190 }
191 }
192