root/lm-sensors/tags/V3-0-1/lib/general.c

/*
    general.c - Part of libsensors, a Linux library for reading sensor data.
    Copyright (c) 1998, 1999  Frodo Looijaard <frodol@dds.nl>

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#include "error.h"
#include "general.h"
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>


#define A_BUNCH 16

void sensors_malloc_array(void *list, int *num_el, int *max_el, int el_size)
{
        void **my_list = (void **)list;

        *my_list = malloc(el_size*A_BUNCH);
        if (! *my_list)
                sensors_fatal_error("sensors_malloc_array",
                                    "Allocating new elements");
        *max_el = A_BUNCH;
        *num_el = 0;
}

void sensors_free_array(void *list, int *num_el, int *max_el)
{
        void **my_list = (void **)list;

        free(*my_list);
        *my_list = NULL;
        *num_el = 0;
        *max_el = 0;
}

void sensors_add_array_el(const void *el, void *list, int *num_el,
                          int *max_el, int el_size)
{
        int new_max_el;
        void **my_list = (void *)list;
        if (*num_el + 1 > *max_el) {
                new_max_el = *max_el + A_BUNCH;
                *my_list = realloc(*my_list, new_max_el * el_size);
                if (! *my_list)
                        sensors_fatal_error("sensors_add_array_el",
                                            "Allocating new elements");
                *max_el = new_max_el;
        }
        memcpy(((char *) *my_list) + *num_el * el_size, el, el_size);
        (*num_el) ++;
}

void sensors_add_array_els(const void *els, int nr_els, void *list,
                           int *num_el, int *max_el, int el_size)
{
        int new_max_el;
        void **my_list = (void *)list;
        if (*num_el + nr_els > *max_el) {
                new_max_el = (*max_el + nr_els + A_BUNCH);
                new_max_el -= new_max_el % A_BUNCH;
                *my_list = realloc(*my_list, new_max_el * el_size);
                if (! *my_list)
                        sensors_fatal_error("sensors_add_array_els",
                                            "Allocating new elements");
                *max_el = new_max_el;
        }
        memcpy(((char *)*my_list) + *num_el * el_size, els, el_size * nr_els);
        *num_el += nr_els;
}