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* byteutils.cpp

* stackimport

* Created by Mr. Z. on 03/31/10.

#include "byteutils.h"

#include <string.h>

char * __hex(int x)

{

const char * hex = "0123456789ABCDEF";

char h[] = "ab";

static char buf[4] = { 0 };

h[0] = hex[(x/16) % 16];

h[1] = hex[x % 16];

strcpy( buf, h );

return buf;

}

// X-Ors the bytes in dest with those in src:

void xornstr(char * dest, const char * src, int n)

{

int i = 0;

for (i=0; i<n; i++)

{

dest[i] ^= src[i];

}

void shiftnstr(char * s, int n, int sh)

{

int i = 0;

int p = 1;

int x = 0;

for (i=0; i<sh; i++) { p += p; } // Bitshift p by sh bits?

for (i=0; i<n; i++)

{

x += ((unsigned char)s[i] * 65536) / p; // Bitshift by 2 bytes?

s[i] = x / 65536; // Store low byte?

x = (x % 65536) * 256; // Keep high byte?

}

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