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/**
* xrdp: A Remote Desktop Protocol server.
*
* Copyright (C) Laxmikant Rashinkar 2013 LK.Rashinkar@gmail.com
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stdio.h>
#include <stdint.h>
#include <string.h>
/**
* An optimized hexdump function
*
* @param address address to display in address column
* @param buf data to hexdump
* @param len number of bytes to dump
*****************************************************************************/
void hexdump(int address, char *buf, int len)
{
uint32_t addr;
char outbuf[80];
int blocks;
int residual;
int i;
int j;
int buf_index;
int index2; /* data column */
int index3; /* ascii column */
unsigned char c;
char cvt[] = {'0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};
if ((buf == NULL) || (len <= 0))
return;
addr = (address < 0) ? 0 : address;
blocks = len / 16;
residual = len - blocks * 16;
buf_index = 0;
for (i = 0; i < blocks; i++)
{
index2 = 10;
index3 = 60;
outbuf[9] = ' ';
outbuf[8] = ' ';
outbuf[7] = cvt[(addr >> 0) & 0x0000000f];
outbuf[6] = cvt[(addr >> 4) & 0x0000000f];
outbuf[5] = cvt[(addr >> 8) & 0x0000000f];
outbuf[4] = cvt[(addr >> 12) & 0x0000000f];
outbuf[3] = cvt[(addr >> 16) & 0x0000000f];
outbuf[2] = cvt[(addr >> 20) & 0x0000000f];
outbuf[1] = cvt[(addr >> 24) & 0x0000000f];
outbuf[0] = cvt[(addr >> 28) & 0x0000000f];
addr += 16;
/* insert spaces */
outbuf[8] = ' ';
outbuf[9] = ' ';
outbuf[58] = ' ';
outbuf[59] = ' ';
for (j = 0; j < 16; j++)
{
c = buf[buf_index++];
outbuf[index2++] = cvt[(c >> 4) & 0x0f];
outbuf[index2++] = cvt[(c >> 0) & 0x0f];
outbuf[index2++] = ' ';
if ((c >= 0x20) && (c <= 0x7e))
outbuf[index3++] = c;
else
outbuf[index3++] = '.';
}
outbuf[index3] = 0;
puts(outbuf);
}
if (!residual)
return;
outbuf[7] = cvt[(addr >> 0) & 0x0000000f];
outbuf[6] = cvt[(addr >> 4) & 0x0000000f];
outbuf[5] = cvt[(addr >> 8) & 0x0000000f];
outbuf[4] = cvt[(addr >> 12) & 0x0000000f];
outbuf[3] = cvt[(addr >> 16) & 0x0000000f];
outbuf[2] = cvt[(addr >> 20) & 0x0000000f];
outbuf[1] = cvt[(addr >> 24) & 0x0000000f];
outbuf[0] = cvt[(addr >> 28) & 0x0000000f];
addr += 16;
index2 = 10;
index3 = 60;
memset(&outbuf[8], ' ', 68);
for (j = 0; j < residual; j++)
{
c = buf[buf_index++];
outbuf[index2++] = cvt[(c >> 4) & 0x0f];
outbuf[index2++] = cvt[(c >> 0) & 0x0f];
outbuf[index2++] = ' ';
if ((c >= 0x20) && (c <= 0x7e))
outbuf[index3++] = c;
else
outbuf[index3++] = '.';
}
outbuf[index3] = 0;
puts(outbuf);
}
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