roaring_bitmap_or_many on array of bitmaps

[Blazer zip]

Hi

I'm trying to do aggregate the array of bitmaps though getting app crashes. What is the correct way to define an array or bitmaps then union them.

#include <stdio.h>
#include <stdlib.h>
#include "roaring.h"

int main()
{
    roaring_bitmap_t ** roaring_bitmaps;

    roaring_bitmaps = (roaring_bitmap_t**) malloc(2 * sizeof(roaring_bitmap_t*));

    roaring_bitmaps[0] = roaring_bitmap_create();
    roaring_bitmaps[1] = roaring_bitmap_create();

    for (uint32_t i = 100; i < 1000; i++) roaring_bitmap_add(roaring_bitmaps[0], i);
    for (uint32_t i = 1000; i < 2000; i++) roaring_bitmap_add(roaring_bitmaps[1], i);

    printf("%d\n",roaring_bitmap_contains(roaring_bitmaps[0], 200));
    printf("%d\n",roaring_bitmap_contains(roaring_bitmaps[0], 1001));
    printf("%d\n",roaring_bitmap_contains(roaring_bitmaps[1], 1500));
    printf("%d\n",roaring_bitmap_contains(roaring_bitmaps[1], 3500));

    roaring_bitmap_t *bigunion = roaring_bitmap_or_many(2, roaring_bitmaps);

    printf("%d\n",roaring_bitmap_contains(bigunion, 200));
    printf("%d\n",roaring_bitmap_contains(bigunion, 1001));
    printf("%d\n",roaring_bitmap_contains(bigunion, 1500));
    printf("%d\n",roaring_bitmap_contains(bigunion, 3500));

    return 0;
}

[Daniel Lemire]

I have added your code to our unit tests:

https://github.com/RoaringBitmap/CRoaring/pull/508/files

It should work fine.

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[Blazer zip]

Hi

Thanks for testing and getting back so promptly. Yes you are correct it does work, seems like it was the compiler I was using, I have tried with different ones and they are all working fine. Seems like it was a bad compiler on my end which left me scratching my head as the app would sometimes crash and sometimes work when it go to the roaring_bitmap_or_many.

Also thanks for adding it as testcase.