src/common/qmi-common.c

/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
 * Copyright (C) 2023 Fabio Porcedda <fabio.porcedda@gmail.com>
 */

#include "qmi-common.h"

#include <stdio.h>

/*****************************************************************************/

gchar *
qmi_common_str_hex (gconstpointer mem,
                    gsize         size,
                    gchar         delimiter)
{
    const guint8 *data = mem;
    gsize         i;
    gsize         j;
    gsize         new_str_length;
    gchar        *new_str;

    /* Get new string length. If input string has N bytes, we need:
     * - 1 byte for last NUL char
     * - 2N bytes for hexadecimal char representation of each byte...
     * - N-1 bytes for the separator ':'
     * So... a total of (1+2N+N-1) = 3N bytes are needed... */
    new_str_length =  3 * size;

    /* Allocate memory for new array and initialize contents to NUL */
    new_str = g_malloc0 (new_str_length);

    /* Print hexadecimal representation of each byte... */
    for (i = 0, j = 0; i < size; i++, j += 3) {
        /* Print character in output string... */
        snprintf (&new_str[j], 3, "%02X", data[i]);
        /* And if needed, add separator */
        if (i != (size - 1) )
            new_str[j + 2] = delimiter;
    }

    /* Set output string */
    return new_str;
}