/* * Copyright (c) 2016 Mikkel Fahnøe Jørgensen, dvide.com * * (MIT License) * Permission is hereby granted, free of charge, to any person obtaining a copy of * this software and associated documentation files (the "Software"), to deal in * the Software without restriction, including without limitation the rights to * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of * the Software, and to permit persons to whom the Software is furnished to do so, * subject to the following conditions: * - The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * - The Software is provided "as is", without warranty of any kind, express or * implied, including but not limited to the warranties of merchantability, * fitness for a particular purpose and noninfringement. In no event shall the * authors or copyright holders be liable for any claim, damages or other * liability, whether in an action of contract, tort or otherwise, arising from, * out of or in connection with the Software or the use or other dealings in the * Software. */ #ifndef PUNLIGNED_H #define PUNLIGNED_H #ifdef __cplusplus extern "C" { #endif #ifndef PORTABLE_UNALIGNED_ACCESS #if defined(__i386__) || defined(__x86_64__) || defined(_M_IX86) || defined(_M_X64) #define PORTABLE_UNALIGNED_ACCESS 1 #else #define PORTABLE_UNALIGNED_ACCESS 0 #endif #endif /* `unaligned_read_16` might not be defined if endianness was not determined. */ #if !defined(unaligned_read_le16toh) #include "pendian.h" #ifndef UINT8_MAX #include #endif #if PORTABLE_UNALIGNED_ACCESS #define unaligned_read_16(p) (*(uint16_t*)(p)) #define unaligned_read_32(p) (*(uint32_t*)(p)) #define unaligned_read_64(p) (*(uint64_t*)(p)) #define unaligned_read_le16toh(p) le16toh(*(uint16_t*)(p)) #define unaligned_read_le32toh(p) le32toh(*(uint32_t*)(p)) #define unaligned_read_le64toh(p) le64toh(*(uint64_t*)(p)) #define unaligned_read_be16toh(p) be16toh(*(uint16_t*)(p)) #define unaligned_read_be32toh(p) be32toh(*(uint32_t*)(p)) #define unaligned_read_be64toh(p) be64toh(*(uint64_t*)(p)) #define unaligned_write_16(p, v) (*(uint16_t*)(p) = (uint16_t)(v)) #define unaligned_write_32(p, v) (*(uint32_t*)(p) = (uint32_t)(v)) #define unaligned_write_64(p, v) (*(uint64_t*)(p) = (uint64_t)(v)) #define unaligned_write_htole16(p, v) (*(uint16_t*)(p) = htole16(v)) #define unaligned_write_htole32(p, v) (*(uint32_t*)(p) = htole32(v)) #define unaligned_write_htole64(p, v) (*(uint64_t*)(p) = htole64(v)) #define unaligned_write_htobe16(p, v) (*(uint16_t*)(p) = htobe16(v)) #define unaligned_write_htobe32(p, v) (*(uint32_t*)(p) = htobe32(v)) #define unaligned_write_htobe64(p, v) (*(uint64_t*)(p) = htobe64(v)) #else #define unaligned_read_le16toh(p) ( \ (((uint16_t)(((uint8_t *)(p))[0])) << 0) | \ (((uint16_t)(((uint8_t *)(p))[1])) << 8)) #define unaligned_read_le32toh(p) ( \ (((uint32_t)(((uint8_t *)(p))[0])) << 0) | \ (((uint32_t)(((uint8_t *)(p))[1])) << 8) | \ (((uint32_t)(((uint8_t *)(p))[2])) << 16) | \ (((uint32_t)(((uint8_t *)(p))[3])) << 24)) #define unaligned_read_le64toh(p) ( \ (((uint64_t)(((uint8_t *)(p))[0])) << 0) | \ (((uint64_t)(((uint8_t *)(p))[1])) << 8) | \ (((uint64_t)(((uint8_t *)(p))[2])) << 16) | \ (((uint64_t)(((uint8_t *)(p))[3])) << 24) | \ (((uint64_t)(((uint8_t *)(p))[4])) << 32) | \ (((uint64_t)(((uint8_t *)(p))[5])) << 40) | \ (((uint64_t)(((uint8_t *)(p))[6])) << 48) | \ (((uint64_t)(((uint8_t *)(p))[7])) << 56)) #define unaligned_read_be16toh(p) ( \ (((uint16_t)(((uint8_t *)(p))[0])) << 8) | \ (((uint16_t)(((uint8_t *)(p))[1])) << 0)) #define unaligned_read_be32toh(p) ( \ (((uint32_t)(((uint8_t *)(p))[0])) << 24) | \ (((uint32_t)(((uint8_t *)(p))[1])) << 16) | \ (((uint32_t)(((uint8_t *)(p))[2])) << 8) | \ (((uint32_t)(((uint8_t *)(p))[3])) << 0)) #define unaligned_read_be64toh(p) ( \ (((uint64_t)(((uint8_t *)(p))[0])) << 56) | \ (((uint64_t)(((uint8_t *)(p))[1])) << 48) | \ (((uint64_t)(((uint8_t *)(p))[2])) << 40) | \ (((uint64_t)(((uint8_t *)(p))[3])) << 32) | \ (((uint64_t)(((uint8_t *)(p))[4])) << 24) | \ (((uint64_t)(((uint8_t *)(p))[5])) << 16) | \ (((uint64_t)(((uint8_t *)(p))[6])) << 8) | \ (((uint64_t)(((uint8_t *)(p))[7])) << 0)) #define unaligned_write_htole16(p, v) do { \ ((uint8_t *)(p))[0] = (uint8_t)(((uint16_t)(v)) >> 0); \ ((uint8_t *)(p))[1] = (uint8_t)(((uint16_t)(v)) >> 8); \ } while (0) #define unaligned_write_htole32(p, v) do { \ ((uint8_t *)(p))[0] = (uint8_t)(((uint32_t)(v)) >> 0); \ ((uint8_t *)(p))[1] = (uint8_t)(((uint32_t)(v)) >> 8); \ ((uint8_t *)(p))[2] = (uint8_t)(((uint32_t)(v)) >> 16); \ ((uint8_t *)(p))[3] = (uint8_t)(((uint32_t)(v)) >> 24); \ } while (0) #define unaligned_write_htole64(p) do { \ ((uint8_t *)(p))[0] = (uint8_t)(((uint64_t)(v)) >> 0); \ ((uint8_t *)(p))[1] = (uint8_t)(((uint64_t)(v)) >> 8); \ ((uint8_t *)(p))[2] = (uint8_t)(((uint64_t)(v)) >> 16); \ ((uint8_t *)(p))[3] = (uint8_t)(((uint64_t)(v)) >> 24); \ ((uint8_t *)(p))[4] = (uint8_t)(((uint64_t)(v)) >> 32); \ ((uint8_t *)(p))[5] = (uint8_t)(((uint64_t)(v)) >> 40); \ ((uint8_t *)(p))[6] = (uint8_t)(((uint64_t)(v)) >> 48); \ ((uint8_t *)(p))[7] = (uint8_t)(((uint64_t)(v)) >> 56); \ } while (0) #define unaligned_write_htobe16(p, v) do { \ ((uint8_t *)(p))[0] = (uint8_t)(((uint16_t)(v)) >> 8); \ ((uint8_t *)(p))[1] = (uint8_t)(((uint16_t)(v)) >> 0); \ } while (0) #define unaligned_write_htobe32(p, v) do { \ ((uint8_t *)(p))[0] = (uint8_t)(((uint32_t)(v)) >> 24); \ ((uint8_t *)(p))[1] = (uint8_t)(((uint32_t)(v)) >> 16); \ ((uint8_t *)(p))[2] = (uint8_t)(((uint32_t)(v)) >> 8); \ ((uint8_t *)(p))[3] = (uint8_t)(((uint32_t)(v)) >> 0); \ } while (0) #define unaligned_write_htobe64(p) do { \ ((uint8_t *)(p))[0] = (uint8_t)(((uint64_t)(v)) >> 56); \ ((uint8_t *)(p))[1] = (uint8_t)(((uint64_t)(v)) >> 48); \ ((uint8_t *)(p))[2] = (uint8_t)(((uint64_t)(v)) >> 40); \ ((uint8_t *)(p))[3] = (uint8_t)(((uint64_t)(v)) >> 32); \ ((uint8_t *)(p))[4] = (uint8_t)(((uint64_t)(v)) >> 24); \ ((uint8_t *)(p))[5] = (uint8_t)(((uint64_t)(v)) >> 16); \ ((uint8_t *)(p))[6] = (uint8_t)(((uint64_t)(v)) >> 8); \ ((uint8_t *)(p))[7] = (uint8_t)(((uint64_t)(v)) >> 0); \ } while (0) #if __LITTLE_ENDIAN__ #define unaligned_read_16(p) unaligned_read_le16toh(p) #define unaligned_read_32(p) unaligned_read_le32toh(p) #define unaligned_read_64(p) unaligned_read_le64toh(p) #define unaligned_write_16(p) unaligned_write_htole16(p) #define unaligned_write_32(p) unaligned_write_htole32(p) #define unaligned_write_64(p) unaligned_write_htole64(p) #endif #if __BIG_ENDIAN__ #define unaligned_read_16(p) unaligned_read_be16toh(p) #define unaligned_read_32(p) unaligned_read_be32toh(p) #define unaligned_read_64(p) unaligned_read_be64toh(p) #define unaligned_write_16(p) unaligned_write_htobe16(p) #define unaligned_write_32(p) unaligned_write_htobe32(p) #define unaligned_write_64(p) unaligned_write_htobe64(p) #endif #endif #endif #ifdef __cplusplus } #endif #endif /* PUNALIGNED_H */