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/*
* hexdump.c:
*
* Copyright (c) 2017 James McKenzie <foss@madingley.org>,
* All rights reserved.
*
*/
#include "project.h"
static unsigned char
printable (unsigned char c)
{
if (c < ' ')
c = '.';
if (c > 126)
c = '.';
return c;
}
void
hexdump (char *prefix, void *_d, size_t os, size_t oe)
{
unsigned char *d = (unsigned char *) _d;
static unsigned char zero[0x10];
size_t s, e;
size_t i, j;
int gap = 0;
s = os & ~15;
e = (oe - 1) | 15;
e++;
for (i = s; i < e; i += 0x10)
{
if (((i > s) && ((i + 0x10) < oe)) && !memcmp (&d[i], zero, 0x10))
{
gap = 1;
continue;
}
if (gap)
{
printf ("%s ...\n", prefix);
gap = 0;
}
printf ("%s %06lx:", prefix, i);
for (j = i; j < (i + 0x10); ++j)
{
if (j == 8)
printf (" ");
if ((j < os) || (j >= oe))
printf (" ");
else
printf (" %02x", d[j]);
}
printf (" ");
for (j = i; j < (i + 0x10); ++j)
{
if (j == 8)
printf (" ");
if ((j < os) || (j >= oe))
printf (" ");
else
printf ("%c", printable (d[j]));
}
printf ("\n");
}
}
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