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

 *

 * Module Name: getopt

 *

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

/*

 * Copyright (C) 2000 - 2018, Intel Corp.

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions, and the following disclaimer,

 *    without modification.

 * 2. Redistributions in binary form must reproduce at minimum a disclaimer

 *    substantially similar to the "NO WARRANTY" disclaimer below

 *    ("Disclaimer") and any redistribution must be conditioned upon

 *    including a substantially similar Disclaimer requirement for further

 *    binary redistribution.

 * 3. Neither the names of the above-listed copyright holders nor the names

 *    of any contributors may be used to endorse or promote products derived

 *    from this software without specific prior written permission.

 *

 * Alternatively, this software may be distributed under the terms of the

 * GNU General Public License ("GPL") version 2 as published by the Free

 * Software Foundation.

 *

 * NO WARRANTY

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR

 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,

 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING

 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

 * POSSIBILITY OF SUCH DAMAGES.

 */

/*

 * ACPICA getopt() implementation

 *

 * Option strings:

 *    "f"       - Option has no arguments

 *    "f:"      - Option requires an argument

 *    "f+"      - Option has an optional argument

 *    "f^"      - Option has optional single-char sub-options

 *    "f|"      - Option has required single-char sub-options

 */

#include "acpi.h"

#include "accommon.h"

#include "acapps.h"

#define ACPI_OPTION_ERROR(msg, badchar) \

    if (AcpiGbl_Opterr) {fprintf (stderr, "%s%c\n", msg, badchar);}

int                 AcpiGbl_Opterr = 1;

int                 AcpiGbl_Optind = 1;

int                 AcpiGbl_SubOptChar = 0;

char                *AcpiGbl_Optarg;

static int          CurrentCharPtr = 1;

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

 *

 * FUNCTION:    AcpiGetoptArgument

 *

 * PARAMETERS:  argc, argv          - from main

 *

 * RETURN:      0 if an argument was found, -1 otherwise. Sets AcpiGbl_Optarg

 *              to point to the next argument.

 *

 * DESCRIPTION: Get the next argument. Used to obtain arguments for the

 *              two-character options after the original call to AcpiGetopt.

 *              Note: Either the argument starts at the next character after

 *              the option, or it is pointed to by the next argv entry.

 *              (After call to AcpiGetopt, we need to backup to the previous

 *              argv entry).

 *

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

int

AcpiGetoptArgument (

    int                     argc,

    char                    **argv)

{

    AcpiGbl_Optind--;

    CurrentCharPtr++;

    if (argv[AcpiGbl_Optind][(int) (CurrentCharPtr+1)] != '\0')

    {

        AcpiGbl_Optarg = &argv[AcpiGbl_Optind++][(int) (CurrentCharPtr+1)];

    }

    else if (++AcpiGbl_Optind >= argc)

    {

        ACPI_OPTION_ERROR ("\nOption requires an argument", 0);

        CurrentCharPtr = 1;

        return (-1);

    }

    else

    {

        AcpiGbl_Optarg = argv[AcpiGbl_Optind++];

    }

    CurrentCharPtr = 1;

    return (0);

}

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

 *

 * FUNCTION:    AcpiGetopt

 *

 * PARAMETERS:  argc, argv          - from main

 *              opts                - options info list

 *

 * RETURN:      Option character or ACPI_OPT_END

 *

 * DESCRIPTION: Get the next option

 *

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

int

AcpiGetopt(

    int                     argc,

    char                    **argv,

    char                    *opts)

{

    int                     CurrentChar;

    char                    *OptsPtr;

    if (CurrentCharPtr == 1)

    {

        if (AcpiGbl_Optind >= argc ||

            argv[AcpiGbl_Optind][0] != '-' ||

            argv[AcpiGbl_Optind][1] == '\0')

        {

            return (ACPI_OPT_END);

        }

        else if (strcmp (argv[AcpiGbl_Optind], "--") == 0)

        {

            AcpiGbl_Optind++;

            return (ACPI_OPT_END);

        }

    }

    /* Get the option */

    CurrentChar = argv[AcpiGbl_Optind][CurrentCharPtr];

    /* Make sure that the option is legal */

    if (CurrentChar == ':' ||

       (OptsPtr = strchr (opts, CurrentChar)) == NULL)

    {

        ACPI_OPTION_ERROR ("Illegal option: -", CurrentChar);

        if (argv[AcpiGbl_Optind][++CurrentCharPtr] == '\0')

        {

            AcpiGbl_Optind++;

            CurrentCharPtr = 1;

        }

        return ('?');

    }

    /* Option requires an argument? */

    if (*++OptsPtr == ':')

    {

        if (argv[AcpiGbl_Optind][(int) (CurrentCharPtr+1)] != '\0')

        {

            AcpiGbl_Optarg = &argv[AcpiGbl_Optind++][(int) (CurrentCharPtr+1)];

        }

        else if (++AcpiGbl_Optind >= argc)

        {

            ACPI_OPTION_ERROR (

                "Option requires an argument: -", CurrentChar);

            CurrentCharPtr = 1;

            return ('?');

        }

        else

        {

            AcpiGbl_Optarg = argv[AcpiGbl_Optind++];

        }

        CurrentCharPtr = 1;

    }

    /* Option has an optional argument? */

    else if (*OptsPtr == '+')

    {

        if (argv[AcpiGbl_Optind][(int) (CurrentCharPtr+1)] != '\0')

        {

            AcpiGbl_Optarg = &argv[AcpiGbl_Optind++][(int) (CurrentCharPtr+1)];

        }

        else if (++AcpiGbl_Optind >= argc)

        {

            AcpiGbl_Optarg = NULL;

        }

        else

        {

            AcpiGbl_Optarg = argv[AcpiGbl_Optind++];

        }

        CurrentCharPtr = 1;

    }

    /* Option has optional single-char arguments? */

    else if (*OptsPtr == '^')

    {

        if (argv[AcpiGbl_Optind][(int) (CurrentCharPtr+1)] != '\0')

        {

            AcpiGbl_Optarg = &argv[AcpiGbl_Optind][(int) (CurrentCharPtr+1)];

        }

        else

        {

            AcpiGbl_Optarg = "^";

        }

        AcpiGbl_SubOptChar = AcpiGbl_Optarg[0];

        AcpiGbl_Optind++;

        CurrentCharPtr = 1;

    }

    /* Option has a required single-char argument? */

    else if (*OptsPtr == '|')

    {

        if (argv[AcpiGbl_Optind][(int) (CurrentCharPtr+1)] != '\0')

        {

            AcpiGbl_Optarg = &argv[AcpiGbl_Optind][(int) (CurrentCharPtr+1)];

        }

        else

        {

            ACPI_OPTION_ERROR (

                "Option requires a single-character suboption: -",

                CurrentChar);

            CurrentCharPtr = 1;

            return ('?');

        }

        AcpiGbl_SubOptChar = AcpiGbl_Optarg[0];

        AcpiGbl_Optind++;

        CurrentCharPtr = 1;

    }

    /* Option with no arguments */

    else

    {

        if (argv[AcpiGbl_Optind][++CurrentCharPtr] == '\0')

        {

            CurrentCharPtr = 1;

            AcpiGbl_Optind++;

        }

        AcpiGbl_Optarg = NULL;

    }

    return (CurrentChar);

}