hexdump/conv.c

   1 /*
   2  * Copyright (c) 1989, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 4. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30 #ifndef lint
  31 static const char sccsid[] = "@(#)conv.c        8.1 (Berkeley) 6/6/93";
  32 #endif /* not lint */
  33 #include <sys/cdefs.h>
  34 __FBSDID("$FreeBSD$");
  35
  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
  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
  58         if (pr->mbleft > 0) {
  59                 str = "**";
  60                 pr->mbleft--;
  61                 goto strpr;
  62         }
  63
  64         switch(*p) {
  65         case '\0':
  66                 str = "\\0";
  67                 goto strpr;
  68         /* case '\a': */
  69         case '\007':
  70                 str = "\\a";
  71                 goto strpr;
  72         case '\b':
  73                 str = "\\b";
  74                 goto strpr;
  75         case '\f':
  76                 str = "\\f";
  77                 goto strpr;
  78         case '\n':
  79                 str = "\\n";
  80                 goto strpr;
  81         case '\r':
  82                 str = "\\r";
  83                 goto strpr;
  84         case '\t':
  85                 str = "\\t";
  86                 goto strpr;
  87         case '\v':
  88                 str = "\\v";
  89                 goto strpr;
  90         default:
  91                 break;
  92         }
  93         /*
  94          * Multibyte characters are disabled for hexdump(1) for backwards
  95          * compatibility and consistency (none of its other output formats
  96          * recognize them correctly).
  97          */
  98         converr = 0;
  99         if (odmode && MB_CUR_MAX > 1) {
 100                 oclen = 0;
 101 retry:
 102                 clen = mbrtowc(&wc, (const char *)p, bufsize, &pr->mbstate);
 103                 if (clen == 0)
 104                         clen = 1;
 105                 else if (clen == (size_t)-1 || (clen == (size_t)-2 &&
 106                     p == peekbuf)) {
 107                         memset(&pr->mbstate, 0, sizeof(pr->mbstate));
 108                         wc = *p;
 109                         clen = 1;
 110                         converr = 1;
 111                 } else if (clen == (size_t)-2) {
 112                         /*
 113                          * Incomplete character; peek ahead and see if we
 114                          * can complete it.
 115                          */
 116                         oclen = bufsize;
 117                         bufsize = peek(p = peekbuf, MB_CUR_MAX);
 118                         goto retry;
 119                 }
 120                 clen += oclen;
 121         } else {
 122                 wc = *p;
 123                 clen = 1;
 124         }
 125         if (!converr && iswprint(wc)) {
 126                 if (!odmode) {
 127                         *pr->cchar = 'c';
 128                         (void)printf(pr->fmt, (int)wc);
 129                 } else {
 130                         *pr->cchar = 'C';
 131                         assert(strcmp(pr->fmt, "%3C") == 0);
 132                         width = wcwidth(wc);
 133                         assert(width >= 0);
 134                         pad = 3 - width;
 135                         if (pad < 0)
 136                                 pad = 0;
 137                         (void)printf("%*s%C", pad, "", wc);
 138                         pr->mbleft = clen - 1;
 139                 }
 140         } else {
 141                 (void)sprintf(buf, "%03o", (int)*p);
 142                 str = buf;
 143 strpr:          *pr->cchar = 's';
 144                 (void)printf(pr->fmt, str);
 145         }
 146 }
 147
 148 void
 149 conv_u(PR *pr, u_char *p)
 150 {
 151         static char const * list[] = {
 152                 "nul", "soh", "stx", "etx", "eot", "enq", "ack", "bel",
 153                  "bs",  "ht",  "lf",  "vt",  "ff",  "cr",  "so",  "si",
 154                 "dle", "dc1", "dc2", "dc3", "dc4", "nak", "syn", "etb",
 155                 "can",  "em", "sub", "esc",  "fs",  "gs",  "rs",  "us",
 156         };
 157
 158                                                 /* od used nl, not lf */
 159         if (*p <= 0x1f) {
 160                 *pr->cchar = 's';
 161                 if (odmode && *p == 0x0a)
 162                         (void)printf(pr->fmt, "nl");
 163                 else
 164                         (void)printf(pr->fmt, list[*p]);
 165         } else if (*p == 0x7f) {
 166                 *pr->cchar = 's';
 167                 (void)printf(pr->fmt, "del");
 168         } else if (odmode && *p == 0x20) {      /* od replaced space with sp */
 169                 *pr->cchar = 's';
 170                 (void)printf(pr->fmt, " sp");
 171         } else if (isprint(*p)) {
 172                 *pr->cchar = 'c';
 173                 (void)printf(pr->fmt, *p);
 174         } else {
 175                 *pr->cchar = 'x';
 176                 (void)printf(pr->fmt, (int)*p);
 177         }
 178 }