/*++

Copyright (c) 2024, Quinn Stephens.
Provided under the BSD 3-Clause license.

Module Name:

   bootopt.c

Abstract:

   Provides boot option utilities.

--*/

#include "bootlib.h"

ULONG
BlGetBootOptionSize (
    IN PBOOT_APPLICATION_OPTION Option
    )

/*++

Routine Description:

    Gets the size of a boot option.

Arguments:

    Option - the boot option to get the size of.

Return Value:

    The size of the option.

--*/

{
    ULONG TotalSize;

    if (Option->DataOffset != 0) {
        TotalSize = Option->DataOffset + Option->DataSize;
    } else {
        TotalSize = sizeof(BOOT_APPLICATION_OPTION);
    }

    if (Option->OtherOptionsOffset != 0) {
        TotalSize += BlGetBootOptionListSize((PBOOT_APPLICATION_OPTION)((PUCHAR)Option + Option->OtherOptionsOffset));
    }

    return TotalSize;
}

ULONG
BlGetBootOptionListSize (
    IN PBOOT_APPLICATION_OPTION Options
    )

/*++

Routine Description:

    Gets the total size of a list boot options.

Arguments:

    Options - the boot option list to get the size of.

Return Value:

    The size of the options.

--*/

{
    ULONG TotalSize, NextOffset;
    PBOOT_APPLICATION_OPTION Option;

    TotalSize = 0;
    NextOffset = 0;
    do {
        Option = (PBOOT_APPLICATION_OPTION)((PUCHAR)Options + NextOffset);
        NextOffset = Option->NextOptionOffset;
        TotalSize += BlGetBootOptionSize(Option);
    } while (NextOffset != 0);

    return TotalSize;
}