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2ba45a60 DM |
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 | } |