40 lines
555 B
C
40 lines
555 B
C
/*
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* SPDX-License-Identifier: GPL-2.0
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*
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* Copyright (c) 2008 Intel Corporation
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* Copyright (c) 2018 The Linux Foundation. All rights reserved.
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*/
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#ifndef _ASCII85_H_
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#define _ASCII85_H_
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#include <linux/math.h>
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#include <linux/types.h>
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#define ASCII85_BUFSZ 6
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static inline long
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ascii85_encode_len(long len)
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{
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return DIV_ROUND_UP(len, 4);
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}
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static inline const char *
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ascii85_encode(u32 in, char *out)
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{
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int i;
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if (in == 0)
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return "z";
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out[5] = '\0';
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for (i = 5; i--; ) {
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out[i] = '!' + in % 85;
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in /= 85;
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}
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return out;
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}
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#endif
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