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