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 __FBSDID("$FreeBSD$"); 37 38 #include <sys/types.h> 39 40 #include <assert.h> 41 #include <ctype.h> 42 #include <limits.h> 43 #include <stdio.h> 44 #include <stdlib.h> 45 #include <string.h> 46 #include <wchar.h> 47 #include <wctype.h> 48 #include "hexdump.h" 49 50 void 51 conv_c(PR *pr, u_char *p, size_t bufsize) 52 { 53 char buf[10]; 54 char const *str; 55 wchar_t wc; 56 size_t clen, oclen; 57 int converr, pad, width; 58 u_char peekbuf[MB_LEN_MAX]; 59 u_char *op; 60 61 op = NULL; 62 63 if (pr->mbleft > 0) { 64 str = "**"; 65 pr->mbleft--; 66 goto strpr; 67 } 68 69 switch(*p) { 70 case '\0': 71 str = "\\0"; 72 goto strpr; 73 /* case '\a': */ 74 case '\007': 75 str = "\\a"; 76 goto strpr; 77 case '\b': 78 str = "\\b"; 79 goto strpr; 80 case '\f': 81 str = "\\f"; 82 goto strpr; 83 case '\n': 84 str = "\\n"; 85 goto strpr; 86 case '\r': 87 str = "\\r"; 88 goto strpr; 89 case '\t': 90 str = "\\t"; 91 goto strpr; 92 case '\v': 93 str = "\\v"; 94 goto strpr; 95 default: 96 break; 97 } 98 /* 99 * Multibyte characters are disabled for hexdump(1) for backwards 100 * compatibility and consistency (none of its other output formats 101 * recognize them correctly). 102 */ 103 converr = 0; 104 if (odmode && MB_CUR_MAX > 1) { 105 oclen = 0; 106 retry: 107 clen = mbrtowc(&wc, p, bufsize, &pr->mbstate); 108 if (clen == 0) 109 clen = 1; 110 else if (clen == (size_t)-1 || (clen == (size_t)-2 && 111 p == peekbuf)) { 112 memset(&pr->mbstate, 0, sizeof(pr->mbstate)); 113 if (p == peekbuf) { 114 /* 115 * We peeked ahead, but that didn't help -- 116 * we either got an illegal sequence or still 117 * can't complete; restore original character. 118 */ 119 oclen = 0; 120 p = op; 121 } 122 wc = *p; 123 clen = 1; 124 converr = 1; 125 } else if (clen == (size_t)-2) { 126 /* 127 * Incomplete character; peek ahead and see if we 128 * can complete it. 129 */ 130 oclen = bufsize; 131 op = p; 132 bufsize = peek(p = peekbuf, MB_CUR_MAX); 133 goto retry; 134 } 135 clen += oclen; 136 } else { 137 wc = *p; 138 clen = 1; 139 } 140 if (!converr && iswprint(wc)) { 141 if (!odmode) { 142 *pr->cchar = 'c'; 143 (void)printf(pr->fmt, (int)wc); 144 } else { 145 *pr->cchar = 'C'; 146 assert(strcmp(pr->fmt, "%3C") == 0); 147 width = wcwidth(wc); 148 assert(width >= 0); 149 pad = 3 - width; 150 if (pad < 0) 151 pad = 0; 152 (void)printf("%*s%C", pad, "", wc); 153 pr->mbleft = clen - 1; 154 } 155 } else { 156 (void)sprintf(buf, "%03o", (int)*p); 157 str = buf; 158 strpr: *pr->cchar = 's'; 159 (void)printf(pr->fmt, str); 160 } 161 } 162 163 void 164 conv_u(PR *pr, u_char *p) 165 { 166 static char const * list[] = { 167 "nul", "soh", "stx", "etx", "eot", "enq", "ack", "bel", 168 "bs", "ht", "lf", "vt", "ff", "cr", "so", "si", 169 "dle", "dc1", "dc2", "dc3", "dc4", "nak", "syn", "etb", 170 "can", "em", "sub", "esc", "fs", "gs", "rs", "us", 171 }; 172 173 /* od used nl, not lf */ 174 if (*p <= 0x1f) { 175 *pr->cchar = 's'; 176 if (odmode && *p == 0x0a) 177 (void)printf(pr->fmt, "nl"); 178 else 179 (void)printf(pr->fmt, list[*p]); 180 } else if (*p == 0x7f) { 181 *pr->cchar = 's'; 182 (void)printf(pr->fmt, "del"); 183 } else if (odmode && *p == 0x20) { /* od replaced space with sp */ 184 *pr->cchar = 's'; 185 (void)printf(pr->fmt, " sp"); 186 } else if (isprint(*p)) { 187 *pr->cchar = 'c'; 188 (void)printf(pr->fmt, *p); 189 } else { 190 *pr->cchar = 'x'; 191 (void)printf(pr->fmt, (int)*p); 192 } 193 } 194