/* * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include "libavcodec/mathops.h" #include <stdlib.h> int main(void){    unsigned u;     for(u=0; u<65536; u++) {        unsigned s = u*u;        unsigned root = ff_sqrt(s);        unsigned root_m1 = ff_sqrt(s-1);        if (s && root != u) {            fprintf(stderr, "ff_sqrt failed at %u with %u\n", s, root);            return 1;        }        if (u && root_m1 != u - 1) {            fprintf(stderr, "ff_sqrt failed at %u with %u\n", s, root);            return 1;        }    }    return 0;}