/* * This file is part of Libav. * * Libav 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. * * Libav 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 Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /* * Based on libavutil/base64.c */ #include <stdio.h> int main(void) { static const char b64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; unsigned i_bits = 0; int i_shift = 0; int out_len = 0; int in; #define putb64() do { \ putchar(b64[(i_bits << 6 >> i_shift) & 0x3f]); \ out_len++; \ i_shift -= 6; \ } while (0) while ((in = getchar()) != EOF) { i_bits = (i_bits << 8) + in; i_shift += 8; while (i_shift > 6) putb64(); } while (i_shift > 0) putb64(); while (out_len++ & 3) putchar('='); putchar('\n'); return 0; }