linux-imx

/*

 * linux/lib/cmdline.c

 * Helper functions generally used for parsing kernel command line

 * and module options.

 *

 * Code and copyrights come from init/main.c and arch/i386/kernel/setup.c.

 *

 * This source code is licensed under the GNU General Public License,

 * Version 2.  See the file COPYING for more details.

 *

 * GNU Indent formatting options for this file: -kr -i8 -npsl -pcs

 *

 */

​

#include <linux/export.h>

#include <linux/kernel.h>

#include <linux/string.h>

#include <linux/ctype.h>

​

/*

 *  If a hyphen was found in get_option, this will handle the

 *  range of numbers, M-N.  This will expand the range and insert

 *  the values[M, M+1, ..., N] into the ints array in get_options.

 */

​

static int get_range(char **str, int *pint, int n)

{

    int x, inc_counter, upper_range;

​

    (*str)++;

    upper_range = simple_strtol((*str), NULL, 0);

    inc_counter = upper_range - *pint;

    for (x = *pint; n && x < upper_range; x++, n--)

        *pint++ = x;

    return inc_counter;

}

​

/**

 *  get_option - Parse integer from an option string

 *  @str: option string

 *  @pint: (output) integer value parsed from @str

 *

 *  Read an int from an option string; if available accept a subsequent

 *  comma as well.

 *

 *  Return values:

 *  0 - no int in string

 *  1 - int found, no subsequent comma

 *  2 - int found including a subsequent comma

 *  3 - hyphen found to denote a range

 */

​

int get_option(char **str, int *pint)

{

    char *cur = *str;

​

    if (!cur || !(*cur))

        return 0;

    *pint = simple_strtol(cur, str, 0);

    if (cur == *str)

        return 0;

    if (**str == ',') {

        (*str)++;