#include "stdio.h"
#include <ctype.h>
#include "hexdump.h"

void hexdump (const char *label, const uint8_t *data, size_t len) {
    if (label)
        printf ("%s (len=%u):\n", label, len);

    for (size_t i = 0; i < len; i += 16) {
        printf ("%04u  ", i);  // offset
        for (size_t j = 0; j < 16; j++) {
            if (i + j < len)
                printf ("%02X ", data[i + j]);
            else
                printf ("   ");  // pad spacing
        }
        printf (" ");
        for (size_t j = 0; j < 16 && i + j < len; j++) {
            uint8_t c = data[i + j];
            printf ("%c", isprint (c) ? c : '.');
        }
        printf ("\n");
    }
}