// inc_bitflags
// Scripts for handling and manipulating an array of boolean values
// As stored in an integer.
// Stephen Jackson / losl
// blade2k.losl@gmail.com

const int BITFLAGS_MAX_ARRAY_INDEX = 31;

//BITFLAG_GetStatus
//Arguments:
//nFlag - Bit to check
//nBitArray - Integer for bitarry
//Returns a boolean status for that flag
int BITFLAG_GetStatus(int nFlag, int nBitArray);

//BITFLAG_ComparsionArray
//Arguments:
//nFlag - Bit To Enable
//Returns an integer with only bit nFlag Enabled.
int BITFLAGS_ComparisonArray(int nFlag);

//BITFLAGS_Switch
//Arguements:
//nFlag - Bit To Change
//bNewStatus - What to make that bit
//nBitArray - The array to work with
//Returns an updated Bit Array.
int BITFLAGS_Switch(int nFlag, int bNewStatus, int nBitArray);

//DEFINITIONS
int BITFLAG_GetStatus(int nFlag, int nBitArray)
{
    int nFlagCheck; //Varible for storing our bitwise comparison.
    int nCompare = nBitArray;

    //Make sure we're checking a legal flag
    if(nFlag < 0 || nFlag >= BITFLAGS_MAX_ARRAY_INDEX)
        nFlag = 0;

    //Check All the BitArrays to make sure they are > 0;
    if(nBitArray < 0)
        nBitArray = 0;

    //Make our bitwise comparison integer
    nFlagCheck = BITFLAGS_ComparisonArray(nFlag);

    if((nFlagCheck & nCompare) == nFlagCheck)
        return 1;
    else
        return 0;
}

int BITFLAGS_ComparisonArray(int nFlag)
{
    return FloatToInt(pow(2.0, IntToFloat(nFlag)));
}

int BITFLAGS_Switch(int nFlag, int bNewStatus, int nBitArray)
{
    int nFlagCheck;
    int bStatus;

    //Legalize
    if(nFlag < 0 || nFlag  >= BITFLAGS_MAX_ARRAY_INDEX)
        nFlag = 0;

    //Check All the BitArrays to make sure they are > 0;
    if(nBitArray < 0)
        nBitArray = 0;

    //Make sure the new Status is Boolean
    if(bNewStatus != 1 && bNewStatus != 0)
        bNewStatus = 1;

    bStatus = BITFLAG_GetStatus(nFlag, nBitArray);

    if(bStatus =! bNewStatus)
    {
        nFlagCheck = BITFLAGS_ComparisonArray(nFlag);
        if(bStatus == TRUE && bNewStatus == FALSE)
            nFlagCheck *= -1;
        nBitArray += nFlagCheck;
    }

    return nBitArray;
}