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/usr.bin/hexdump/conv.c

https://bitbucket.org/freebsd/freebsd-head/
C | 178 lines | 131 code | 8 blank | 39 comment | 36 complexity | 8754e0dfc0498f64a25b5860109dce4f MD5 | raw file
  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
 31static 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
 48void
 49conv_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;
101retry:
102		clen = mbrtowc(&wc, 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;
143strpr:		*pr->cchar = 's';
144		(void)printf(pr->fmt, str);
145	}
146}
147
148void
149conv_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", "dcl", "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}