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 #include <sys/types.h> 33 34 #include <assert.h> 35 #include <ctype.h> 36 #include <limits.h> 37 #include <stdio.h> 38 #include <stdlib.h> 39 #include <string.h> 40 #include <wchar.h> 41 #include <wctype.h> 42 #include "hexdump.h" 43 44 void 45 conv_c(PR *pr, u_char *p, size_t bufsize) 46 { 47 char buf[10]; 48 char const *str; 49 wchar_t wc; 50 size_t clen, oclen; 51 int converr, pad, width; 52 u_char peekbuf[MB_LEN_MAX]; 53 u_char *op; 54 55 op = NULL; 56 57 if (pr->mbleft > 0) { 58 str = "**"; 59 pr->mbleft--; 60 goto strpr; 61 } 62 63 switch(*p) { 64 case '\0': 65 str = "\\0"; 66 goto strpr; 67 /* case '\a': */ 68 case '\007': 69 str = "\\a"; 70 goto strpr; 71 case '\b': 72 str = "\\b"; 73 goto strpr; 74 case '\f': 75 str = "\\f"; 76 goto strpr; 77 case '\n': 78 str = "\\n"; 79 goto strpr; 80 case '\r': 81 str = "\\r"; 82 goto strpr; 83 case '\t': 84 str = "\\t"; 85 goto strpr; 86 case '\v': 87 str = "\\v"; 88 goto strpr; 89 default: 90 break; 91 } 92 /* 93 * Multibyte characters are disabled for hexdump(1) for backwards 94 * compatibility and consistency (none of its other output formats 95 * recognize them correctly). 96 */ 97 converr = 0; 98 if (odmode && MB_CUR_MAX > 1) { 99 oclen = 0; 100 retry: 101 clen = mbrtowc(&wc, p, bufsize, &pr->mbstate); 102 if (clen == 0) 103 clen = 1; 104 else if (clen == (size_t)-1 || (clen == (size_t)-2 && 105 p == peekbuf)) { 106 memset(&pr->mbstate, 0, sizeof(pr->mbstate)); 107 if (p == peekbuf) { 108 /* 109 * We peeked ahead, but that didn't help -- 110 * we either got an illegal sequence or still 111 * can't complete; restore original character. 112 */ 113 oclen = 0; 114 p = op; 115 } 116 wc = *p; 117 clen = 1; 118 converr = 1; 119 } else if (clen == (size_t)-2) { 120 /* 121 * Incomplete character; peek ahead and see if we 122 * can complete it. 123 */ 124 oclen = bufsize; 125 op = p; 126 bufsize = peek(p = peekbuf, MB_CUR_MAX); 127 goto retry; 128 } 129 clen += oclen; 130 } else { 131 wc = *p; 132 clen = 1; 133 } 134 if (!converr && iswprint(wc)) { 135 if (!odmode) { 136 *pr->cchar = 'c'; 137 (void)printf(pr->fmt, (int)wc); 138 } else { 139 *pr->cchar = 'C'; 140 assert(strcmp(pr->fmt, "%3C") == 0); 141 width = wcwidth(wc); 142 assert(width >= 0); 143 pad = 3 - width; 144 if (pad < 0) 145 pad = 0; 146 (void)printf("%*s%C", pad, "", wc); 147 pr->mbleft = clen - 1; 148 } 149 } else { 150 (void)sprintf(buf, "%03o", (int)*p); 151 str = buf; 152 strpr: *pr->cchar = 's'; 153 (void)printf(pr->fmt, str); 154 } 155 } 156 157 void 158 conv_u(PR *pr, u_char *p) 159 { 160 static char const * list[] = { 161 "nul", "soh", "stx", "etx", "eot", "enq", "ack", "bel", 162 "bs", "ht", "lf", "vt", "ff", "cr", "so", "si", 163 "dle", "dc1", "dc2", "dc3", "dc4", "nak", "syn", "etb", 164 "can", "em", "sub", "esc", "fs", "gs", "rs", "us", 165 }; 166 167 /* od used nl, not lf */ 168 if (*p <= 0x1f) { 169 *pr->cchar = 's'; 170 if (odmode && *p == 0x0a) 171 (void)printf(pr->fmt, "nl"); 172 else 173 (void)printf(pr->fmt, list[*p]); 174 } else if (*p == 0x7f) { 175 *pr->cchar = 's'; 176 (void)printf(pr->fmt, "del"); 177 } else if (odmode && *p == 0x20) { /* od replaced space with sp */ 178 *pr->cchar = 's'; 179 (void)printf(pr->fmt, " sp"); 180 } else if (isprint(*p)) { 181 *pr->cchar = 'c'; 182 (void)printf(pr->fmt, *p); 183 } else { 184 *pr->cchar = 'x'; 185 (void)printf(pr->fmt, (int)*p); 186 } 187 } 188