File: ffs.c

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/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#if !defined(XP_UNIX)

int
ffs(unsigned int i)
{
    int rv = 1;

    if (!i)
        return 0;

    while (!(i & 1)) {
        i >>= 1;
        ++rv;
    }

    return rv;
}
#endif