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#include "listmem.h"
#include <stdlib.h>
#include <string.h>
#include <iomanip>
using namespace std;
/*
* Functions to list a memory buffer:
*/
/* Turn byte into Hexadecimal ascii representation */
static char *hexa(unsigned int i)
{
int j;
static char asc[3];
asc[0] = (i >> 4) & 0x0f;
asc[1] = i & 0x0f;
asc[2] = 0;
for (j = 0; j < 2; j++)
if (asc[j] > 9) {
asc[j] += 55;
} else {
asc[j] += 48;
}
return (asc);
}
static void l_swap16(unsigned char *d, const unsigned char *s, int n)
{
if (n & 1) {
n >>= 1;
n++;
} else {
n >>= 1;
}
while (n--) {
int i;
i = 2 * n;
d[i] = s[i + 1];
d[i + 1] = s[i];
}
}
static void l_swap32(unsigned char *d, const unsigned char *s, int n)
{
if (n & 3) {
n >>= 2;
n++;
} else {
n >>= 2;
}
while (n--) {
int i;
i = 4 * n;
d[i] = s[i + 3];
d[i + 1] = s[i + 2];
d[i + 2] = s[i + 1];
d[i + 3] = s[i];
}
}
/* Turn byte buffer into hexadecimal representation */
void charbuftohex(int len, unsigned char *dt, int maxlen, char *str)
{
int i;
char *bf;
for (i = 0, bf = str; i < len; i++) {
char *cp;
if (bf - str >= maxlen - 4) {
break;
}
cp = hexa((unsigned int)dt[i]);
*bf++ = *cp++;
*bf++ = *cp++;
*bf++ = ' ';
}
*bf++ = 0;
}
void listmem(ostream& os, const void *_ptr, int siz, int adr, int opts)
{
const unsigned char *ptr = (const unsigned char *)_ptr;
int i, j, c;
char lastlisted[16];
int alreadysame = 0;
int oneout = 0;
unsigned char *mpt;
if (opts & (LISTMEM_SWAP16 | LISTMEM_SWAP32)) {
if ((mpt = (unsigned char *)malloc(siz + 4)) == NULL) {
os << "OUT OF MEMORY\n";
return;
}
if (opts & LISTMEM_SWAP16) {
l_swap16(mpt, ptr, siz);
} else if (opts & LISTMEM_SWAP32) {
l_swap32(mpt, ptr, siz);
}
} else {
mpt = (unsigned char *)ptr;
}
for (i = 0; i < siz; i += 16) {
/* Check for same data (only print first line in this case) */
if (oneout != 0 &&
siz - i >= 16 && memcmp(lastlisted, mpt + i, 16) == 0) {
if (alreadysame == 0) {
os << "*\n";
alreadysame = 1;
}
continue;
}
alreadysame = 0;
/* Line header */
os << std::setw(4) << i + adr << " ";
/* Hexadecimal representation */
for (j = 0; j < 16; j++) {
if ((i + j) < siz) {
os << hexa(mpt[i + j]) << ((j & 1) ? " " : "");
} else {
os << " " << ((j & 1) ? " " : "");
}
}
os << " ";
/* Also print ascii for values that fit */
for (j = 0; j < 16; j++) {
if ((i + j) < siz) {
c = mpt[i + j];
if (c >= 0x20 && c <= 0x7f) {
os << char(c);
} else {
os << ".";
}
} else {
os << " ";
}
}
os << "\n";
memcpy(lastlisted, mpt + i, 16);
oneout = 1;
}
if (mpt != ptr) {
free(mpt);
}
}
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