kutils.c

Go to the documentation of this file.

// SPDX-License-Identifier: GPL-3.0-or-later
 
#include "mos/misc/kutils.h"
 
#include "mos/syslog/printk.h"
 
static const int HEXDUMP_COLS = 16;
 
void hexdump(const char *data, const size_t len)
{
    if (len)
        pr_info("  " PTR_FMT ": ", (ptr_t) data);
 
    for (size_t i = 0; i < len; i++)
    {
        pr_cont("%02hhx ", (char) data[i]);
        if ((i + 1) % HEXDUMP_COLS == 0)
        {
            for (size_t j = i - (HEXDUMP_COLS - 1); j <= i; j++)
            {
                const char c = data[j];
                pr_cont("%c", c >= 32 && c <= 126 ? c : '.');
            }
 
            if (i + 1 < len)
                pr_info("  " PTR_FMT ": ", (ptr_t) (data + i + 1));
        }
    }
 
    if (len % HEXDUMP_COLS != 0)
    {
        const size_t spaces = (HEXDUMP_COLS - (len % HEXDUMP_COLS)) * 3;
        pr_cont("%*c", (int) spaces, ' ');
        for (size_t i = len - (len % HEXDUMP_COLS); i < len; i++)
        {
            const char c = data[i];
            pr_cont("%c", c >= 32 && c <= 126 ? c : '.');
        }
    }
 
    pr_info("");
}