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_ */ 141
