blob: 5035ad96a77bc6b2bed5d4b2d532c40fcbe92e33
1 | /* |
2 | * This file is part of FFmpeg. |
3 | * |
4 | * FFmpeg is free software; you can redistribute it and/or |
5 | * modify it under the terms of the GNU Lesser General Public |
6 | * License as published by the Free Software Foundation; either |
7 | * version 2.1 of the License, or (at your option) any later version. |
8 | * |
9 | * FFmpeg is distributed in the hope that it will be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 | * Lesser General Public License for more details. |
13 | * |
14 | * You should have received a copy of the GNU Lesser General Public |
15 | * License along with FFmpeg; if not, write to the Free Software |
16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
17 | */ |
18 | |
19 | /* |
20 | * Based on libavutil/base64.c |
21 | */ |
22 | |
23 | #include <stdio.h> |
24 | |
25 | int main(void) |
26 | { |
27 | static const char b64[] = |
28 | "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; |
29 | unsigned i_bits = 0; |
30 | int i_shift = 0; |
31 | int out_len = 0; |
32 | int in; |
33 | |
34 | #define putb64() \ |
35 | do { \ |
36 | putchar(b64[(i_bits << 6 >> i_shift) & 0x3f]); \ |
37 | out_len++; \ |
38 | i_shift -= 6; \ |
39 | } while (0) |
40 | |
41 | while ((in = getchar()) != EOF) { |
42 | i_bits = (i_bits << 8) + in; |
43 | i_shift += 8; |
44 | while (i_shift > 6) |
45 | putb64(); |
46 | } |
47 | while (i_shift > 0) |
48 | putb64(); |
49 | while (out_len++ & 3) |
50 | putchar('='); |
51 | putchar('\n'); |
52 | |
53 | return 0; |
54 | } |
55 |