yading@11: /*
yading@11:  * This file is part of FFmpeg.
yading@11:  *
yading@11:  * FFmpeg is free software; you can redistribute it and/or
yading@11:  * modify it under the terms of the GNU Lesser General Public
yading@11:  * License as published by the Free Software Foundation; either
yading@11:  * version 2.1 of the License, or (at your option) any later version.
yading@11:  *
yading@11:  * FFmpeg is distributed in the hope that it will be useful,
yading@11:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@11:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@11:  * Lesser General Public License for more details.
yading@11:  *
yading@11:  * You should have received a copy of the GNU Lesser General Public
yading@11:  * License along with FFmpeg; if not, write to the Free Software
yading@11:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@11:  */
yading@11: 
yading@11: /*
yading@11:  * Based on libavutil/base64.c
yading@11:  */
yading@11: 
yading@11: #include <stdio.h>
yading@11: 
yading@11: int main(void)
yading@11: {
yading@11:     static const char b64[] =
yading@11:         "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
yading@11:     unsigned i_bits = 0;
yading@11:     int i_shift     = 0;
yading@11:     int out_len     = 0;
yading@11:     int in;
yading@11: 
yading@11: #define putb64()                                        \
yading@11:     do {                                                \
yading@11:         putchar(b64[(i_bits << 6 >> i_shift) & 0x3f]);  \
yading@11:         out_len++;                                      \
yading@11:         i_shift -= 6;                                   \
yading@11:     } while (0)
yading@11: 
yading@11:     while ((in = getchar()) != EOF) {
yading@11:         i_bits   = (i_bits << 8) + in;
yading@11:         i_shift += 8;
yading@11:         while (i_shift > 6)
yading@11:             putb64();
yading@11:     }
yading@11:     while (i_shift > 0)
yading@11:         putb64();
yading@11:     while (out_len++ & 3)
yading@11:         putchar('=');
yading@11:     putchar('\n');
yading@11: 
yading@11:     return 0;
yading@11: }