2 * Copyright 2007-2009 Colin Percival
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * This file was originally written by Colin Percival as part of the Tarsnap
27 * online backup system.
32 #include "scrypt_platform.h"
34 /* If we don't have be64enc, the <sys/endian.h> we have isn't usable. */
35 #if !HAVE_DECL_BE64ENC
36 #undef HAVE_SYS_ENDIAN_H
39 #ifdef HAVE_SYS_ENDIAN_H
41 #include <sys/endian.h>
47 static inline uint32_t
48 be32dec(const void *pp)
50 const uint8_t *p = (uint8_t const *)pp;
52 return ((uint32_t)(p[3]) + ((uint32_t)(p[2]) << 8) +
53 ((uint32_t)(p[1]) << 16) + ((uint32_t)(p[0]) << 24));
57 be32enc(void *pp, uint32_t x)
59 uint8_t * p = (uint8_t *)pp;
62 p[2] = (x >> 8) & 0xff;
63 p[1] = (x >> 16) & 0xff;
64 p[0] = (x >> 24) & 0xff;
67 static inline uint64_t
68 be64dec(const void *pp)
70 const uint8_t *p = (uint8_t const *)pp;
72 return ((uint64_t)(p[7]) + ((uint64_t)(p[6]) << 8) +
73 ((uint64_t)(p[5]) << 16) + ((uint64_t)(p[4]) << 24) +
74 ((uint64_t)(p[3]) << 32) + ((uint64_t)(p[2]) << 40) +
75 ((uint64_t)(p[1]) << 48) + ((uint64_t)(p[0]) << 56));
79 be64enc(void *pp, uint64_t x)
81 uint8_t * p = (uint8_t *)pp;
84 p[6] = (x >> 8) & 0xff;
85 p[5] = (x >> 16) & 0xff;
86 p[4] = (x >> 24) & 0xff;
87 p[3] = (x >> 32) & 0xff;
88 p[2] = (x >> 40) & 0xff;
89 p[1] = (x >> 48) & 0xff;
90 p[0] = (x >> 56) & 0xff;
93 static inline uint32_t
94 le32dec(const void *pp)
96 const uint8_t *p = (uint8_t const *)pp;
98 return ((uint32_t)(p[0]) + ((uint32_t)(p[1]) << 8) +
99 ((uint32_t)(p[2]) << 16) + ((uint32_t)(p[3]) << 24));
103 le32enc(void *pp, uint32_t x)
105 uint8_t * p = (uint8_t *)pp;
108 p[1] = (x >> 8) & 0xff;
109 p[2] = (x >> 16) & 0xff;
110 p[3] = (x >> 24) & 0xff;
113 static inline uint64_t
114 le64dec(const void *pp)
116 const uint8_t *p = (uint8_t const *)pp;
118 return ((uint64_t)(p[0]) + ((uint64_t)(p[1]) << 8) +
119 ((uint64_t)(p[2]) << 16) + ((uint64_t)(p[3]) << 24) +
120 ((uint64_t)(p[4]) << 32) + ((uint64_t)(p[5]) << 40) +
121 ((uint64_t)(p[6]) << 48) + ((uint64_t)(p[7]) << 56));
125 le64enc(void *pp, uint64_t x)
127 uint8_t * p = (uint8_t *)pp;
130 p[1] = (x >> 8) & 0xff;
131 p[2] = (x >> 16) & 0xff;
132 p[3] = (x >> 24) & 0xff;
133 p[4] = (x >> 32) & 0xff;
134 p[5] = (x >> 40) & 0xff;
135 p[6] = (x >> 48) & 0xff;
136 p[7] = (x >> 56) & 0xff;
138 #endif /* !HAVE_SYS_ENDIAN_H */
140 #endif /* !_SYSENDIAN_H_ */