hexdump.c

来自「打魔兽战网的都知道他是什么」· C语言 代码 · 共 93 行

/*
 * Copyright (C) 1998  Mark Baysinger ([e-mail])
 * Copyright (C) 1998,1999  Ross Combs ([e-mail])
 * Copyright (C) 2004  Donny Redmond ([e-mail])
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
#include "common/setup_before.h"
#include <stdio.h>
#ifdef HAVE_STDDEF_H
# include <stddef.h>
#else
# ifndef NULL
#  define NULL ((void *)0)
# endif
#endif
#include <string.h>
#include "common/packet.h"
#include "common/hexdump.h"
#include "common/eventlog.h"
#include "common/setup_after.h"

extern void hexdump(FILE * stream, void const * data, unsigned int len) 
{
    unsigned int i;
    char dst[100];
    unsigned char * datac;

    if (!data) {
	eventlog(eventlog_level_error, __FUNCTION__, "got NULL data");
        return;
    }

    if (!stream) {
	eventlog(eventlog_level_error, __FUNCTION__, "got NULL stream");
	return;
    }

    for (i = 0, datac = (char*)data ; i < len; i += 16, datac += 16)
    {
	hexdump_string(datac, (len - i < 16) ? (len - i) : 16, dst, i);
	fprintf(stream, "%s\n", dst);
	fflush(stream);
    }
}

extern void hexdump_string(unsigned char * data, unsigned int datalen, char * dst, unsigned int counter)
{
    unsigned int c;
    int tlen = 0;
    unsigned char *datatmp;

    datatmp = data;
    tlen += sprintf((dst+tlen), "%04X:   ", counter);
	
    for (c=0; c<8; c++) /* left half of hex dump */
        if (c<datalen)
    	    tlen += sprintf((dst+tlen), "%02X ", *(datatmp++));
	else
	    tlen += sprintf((dst+tlen), "   "); /* pad if short line */

    tlen += sprintf((dst+tlen),"  ");

    for (c=8; c<16; c++) /* right half of hex dump */
        if (c<datalen)
	    tlen += sprintf((dst+tlen), "%02X ", *(datatmp++));
	else
	    tlen += sprintf((dst+tlen),"   "); /* pad if short line */

    tlen += sprintf((dst+tlen),"   ");

    for (c=0, datatmp = data; c<16; c++, datatmp++) /* ASCII dump */
        if (c<datalen) {
	    if (*datatmp >=32 && *datatmp<127)
		tlen += sprintf((dst+tlen), "%c", *datatmp);
	    else
		tlen += sprintf((dst+tlen), "."); /* put this for non-printables */
	}

}