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| 1 /*- |
| 2 * Copyright 2007-2009 Colin Percival |
| 3 * All rights reserved. |
| 4 * |
| 5 * Redistribution and use in source and binary forms, with or without |
| 6 * modification, are permitted provided that the following conditions |
| 7 * are met: |
| 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. |
| 13 * |
| 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 |
| 24 * SUCH DAMAGE. |
| 25 * |
| 26 * This file was originally written by Colin Percival as part of the Tarsnap |
| 27 * online backup system. |
| 28 */ |
| 29 #ifndef _SYSENDIAN_H_ |
| 30 #define _SYSENDIAN_H_ |
| 31 |
| 32 #include "scrypt_platform.h" |
| 33 |
| 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 |
| 37 #endif |
| 38 |
| 39 #ifdef HAVE_SYS_ENDIAN_H |
| 40 |
| 41 #include <sys/endian.h> |
| 42 |
| 43 #else |
| 44 |
| 45 #include <stdint.h> |
| 46 |
| 47 static inline uint32_t |
| 48 be32dec(const void *pp) |
| 49 { |
| 50 const uint8_t *p = (uint8_t const *)pp; |
| 51 |
| 52 return ((uint32_t)(p[3]) + ((uint32_t)(p[2]) << 8) + |
| 53 ((uint32_t)(p[1]) << 16) + ((uint32_t)(p[0]) << 24)); |
| 54 } |
| 55 |
| 56 static inline void |
| 57 be32enc(void *pp, uint32_t x) |
| 58 { |
| 59 uint8_t * p = (uint8_t *)pp; |
| 60 |
| 61 p[3] = x & 0xff; |
| 62 p[2] = (x >> 8) & 0xff; |
| 63 p[1] = (x >> 16) & 0xff; |
| 64 p[0] = (x >> 24) & 0xff; |
| 65 } |
| 66 |
| 67 static inline uint64_t |
| 68 be64dec(const void *pp) |
| 69 { |
| 70 const uint8_t *p = (uint8_t const *)pp; |
| 71 |
| 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)); |
| 76 } |
| 77 |
| 78 static inline void |
| 79 be64enc(void *pp, uint64_t x) |
| 80 { |
| 81 uint8_t * p = (uint8_t *)pp; |
| 82 |
| 83 p[7] = x & 0xff; |
| 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; |
| 91 } |
| 92 |
| 93 static inline uint32_t |
| 94 le32dec(const void *pp) |
| 95 { |
| 96 const uint8_t *p = (uint8_t const *)pp; |
| 97 |
| 98 return ((uint32_t)(p[0]) + ((uint32_t)(p[1]) << 8) + |
| 99 ((uint32_t)(p[2]) << 16) + ((uint32_t)(p[3]) << 24)); |
| 100 } |
| 101 |
| 102 static inline void |
| 103 le32enc(void *pp, uint32_t x) |
| 104 { |
| 105 uint8_t * p = (uint8_t *)pp; |
| 106 |
| 107 p[0] = x & 0xff; |
| 108 p[1] = (x >> 8) & 0xff; |
| 109 p[2] = (x >> 16) & 0xff; |
| 110 p[3] = (x >> 24) & 0xff; |
| 111 } |
| 112 |
| 113 static inline uint64_t |
| 114 le64dec(const void *pp) |
| 115 { |
| 116 const uint8_t *p = (uint8_t const *)pp; |
| 117 |
| 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)); |
| 122 } |
| 123 |
| 124 static inline void |
| 125 le64enc(void *pp, uint64_t x) |
| 126 { |
| 127 uint8_t * p = (uint8_t *)pp; |
| 128 |
| 129 p[0] = x & 0xff; |
| 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; |
| 137 } |
| 138 #endif /* !HAVE_SYS_ENDIAN_H */ |
| 139 |
| 140 #endif /* !_SYSENDIAN_H_ */ |
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