C bitwise macro to Java
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Thread: C bitwise macro to Java

  1. #1
    Join Date
    Jun 2012
    Posts
    3

    Question C bitwise macro to Java

    I'm hoping there are a few Java programmers here who are familiar with the C Programming language.

    I need to convert this C macro to java.

    #define set_bit(array,bit) ((array [(bit) / 32] |= (1L << ((bit) % 32 )))

    I believe the array is an unsigned long and the bit is an int. My best guess is that the macro is setting an entry of the unsigned long (array) to a value calculated by left shifting the value of the remainder of bit mod (%) 32. However, I'm not sure how to convert this to Java.

    Thanks for any help or if you can point me in the right direction.

  2. #2
    Join Date
    Oct 2006
    Location
    Sweden
    Posts
    3,632

    Re: C bitwise macro to Java

    Without knowing anything about java I would replace it with a function like
    Code:
    void set_bit(int array[], int bit)
    {
        array[bit / 32] |= 1L << (bit % 32 );
    }
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