conv.c

来自「Util-linux 软件包包含许多工具。其中比较重要的是加载、卸载、格式化、分」· C语言 代码 · 共 120 行

/*
 * Copyright (c) 1989 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <stdio.h>
#include <ctype.h>
#include <sys/types.h>
#include "hexdump.h"

void
conv_c(PR *pr, u_char *p)
{
	char buf[10];
	char const *str;

	switch(*p) {
	case '\0':
		str = "\\0";
		goto strpr;
	/* case '\a': */
	case '\007':
		if (deprecated)		/* od didn't know about \a */
			break;
		str = "\\a";
		goto strpr;
	case '\b':
		str = "\\b";
		goto strpr;
	case '\f':
		str = "\\f";
		goto strpr;
	case '\n':
		str = "\\n";
		goto strpr;
	case '\r':
		str = "\\r";
		goto strpr;
	case '\t':
		str = "\\t";
		goto strpr;
	case '\v':
		if (deprecated)
			break;
		str = "\\v";
		goto strpr;
	default:
		break;
	}
	if (isprint(*p)) {
		*pr->cchar = 'c';
		(void)printf(pr->fmt, *p);
	} else {
		(void)sprintf(buf, "%03o", (int)*p);
		str = buf;
strpr:		*pr->cchar = 's';
		(void)printf(pr->fmt, str);
	}
}

void
conv_u(PR *pr, u_char *p)
{
	static const char *list[] = {
		"nul", "soh", "stx", "etx", "eot", "enq", "ack", "bel",
		 "bs",  "ht",  "lf",  "vt",  "ff",  "cr",  "so",  "si",
		"dle", "dcl", "dc2", "dc3", "dc4", "nak", "syn", "etb",
		"can",  "em", "sub", "esc",  "fs",  "gs",  "rs",  "us",
	};

						/* od used nl, not lf */
	if (*p <= 0x1f) {
		*pr->cchar = 's';
		if (deprecated && *p == 0x0a)
			(void)printf(pr->fmt, "nl");
		else
			(void)printf(pr->fmt, list[*p]);
	} else if (*p == 0x7f) {
		*pr->cchar = 's';
		(void)printf(pr->fmt, "del");
	} else if (deprecated && *p == 0x20) {	/* od replaced space with sp */
		*pr->cchar = 's';
		(void)printf(pr->fmt, " sp");
	} else if (isprint(*p)) {
		*pr->cchar = 'c';
		(void)printf(pr->fmt, *p);
	} else {
		*pr->cchar = 'x';
		(void)printf(pr->fmt, (int)*p);
	}
}