/**************************************************************************** * include/sys/endian.h * * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. The * ASF licenses this file to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the * License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the * License for the specific language governing permissions and limitations * under the License. * ****************************************************************************/ #ifndef __INCLUDE_SYS_ENDIAN_H #define __INCLUDE_SYS_ENDIAN_H /**************************************************************************** * Included Files ****************************************************************************/ #include #include #include /**************************************************************************** * Preprocessor definitions ****************************************************************************/ /* The endian.h header must define at least the following macros for use in * determining host byte order for integer types: * * BYTE_ORDER This macro will have a value equal to one of the *_ENDIAN * macros in this header. * LITTLE_ENDIAN If BYTE_ORDER == LITTLE_ENDIAN, the host byte order is * from least significant to most significant. * BIG_ENDIAN If BYTE_ORDER == BIG_ENDIAN, the host byte order is from * most significant to least significant. */ #define LITTLE_ENDIAN 1234 #define __LITTLE_ENDIAN 1234 #define BIG_ENDIAN 4321 #define __BIG_ENDIAN 4321 /* Common byte swapping macros */ #ifdef CONFIG_HAVE_BUILTIN_BSWAP16 # define __swap_uint16 __builtin_bswap16 #else # define __swap_uint16(n) \ (uint16_t)(((((uint16_t)(n)) & 0x00ff) << 8) | \ ((((uint16_t)(n)) >> 8) & 0x00ff)) #endif #ifdef CONFIG_HAVE_BUILTIN_BSWAP32 # define __swap_uint32 __builtin_bswap32 #else # define __swap_uint32(n) \ (uint32_t)(((((uint32_t)(n)) & 0x000000ffUL) << 24) | \ ((((uint32_t)(n)) & 0x0000ff00UL) << 8) | \ ((((uint32_t)(n)) & 0x00ff0000UL) >> 8) | \ ((((uint32_t)(n)) & 0xff000000UL) >> 24)) #endif #ifdef CONFIG_HAVE_LONG_LONG # ifdef CONFIG_HAVE_BUILTIN_BSWAP64 # define __swap_uint64 __builtin_bswap64 # else # define __swap_uint64(n) \ (uint64_t)(((((uint64_t)(n)) & 0x00000000000000ffULL) << 56) | \ ((((uint64_t)(n)) & 0x000000000000ff00ULL) << 40) | \ ((((uint64_t)(n)) & 0x0000000000ff0000ULL) << 24) | \ ((((uint64_t)(n)) & 0x00000000ff000000ULL) << 8) | \ ((((uint64_t)(n)) & 0x000000ff00000000ULL) >> 8) | \ ((((uint64_t)(n)) & 0x0000ff0000000000ULL) >> 24) | \ ((((uint64_t)(n)) & 0x00ff000000000000ULL) >> 40) | \ ((((uint64_t)(n)) & 0xff00000000000000ULL) >> 56)) # endif #endif /* Endian-specific definitions */ #ifdef CONFIG_ENDIAN_BIG /* Big-endian byte order */ # define BYTE_ORDER BIG_ENDIAN # define __BYTE_ORDER __BIG_ENDIAN /* Big-endian byte order macros */ # define htobe16(n) (n) # define htole16(n) __swap_uint16((uint16_t)n) # define be16toh(n) (n) # define le16toh(n) __swap_uint16((uint16_t)n) # define htobe32(n) (n) # define htole32(n) __swap_uint32((uint32_t)n) # define be32toh(n) (n) # define le32toh(n) __swap_uint32(n) # ifdef CONFIG_HAVE_LONG_LONG # define htobe64(n) (n) # define htole64(n) __swap_uint64((uint64_t)n) # define be64toh(n) (n) # define le64toh(n) __swap_uint64((uint64_t)n) # endif #else /* Little-endian byte order */ # define BYTE_ORDER LITTLE_ENDIAN # define __BYTE_ORDER __LITTLE_ENDIAN /* Little-endian byte order macros */ # define htobe16(n) __swap_uint16((uint16_t)n) # define htole16(n) (n) # define be16toh(n) __swap_uint16((uint16_t)n) # define le16toh(n) (n) # define htobe32(n) __swap_uint32((uint32_t)n) # define htole32(n) (n) # define be32toh(n) __swap_uint32((uint32_t)n) # define le32toh(n) (n) # ifdef CONFIG_HAVE_LONG_LONG # define htobe64(n) __swap_uint64((uint64_t)n) # define htole64(n) (n) # define be64toh(n) __swap_uint64((uint64_t)n) # define le64toh(n) (n) # endif #endif /* OpenBSD style */ #define swap16 __swap_uint16 #define swap32 __swap_uint32 #define swap64 __swap_uint64 #define betoh16 be16toh #define letoh16 le16toh #define bemtoh16(x) betoh16(*(FAR uint16_t *)(x)) #define htobem16(x, v) (*(FAR uint16_t *)(x) = htobe16(v)) #define lemtoh16(x) letoh16(*(FAR uint16_t *)(x)) #define htolem16(x, v) (*(FAR uint16_t *)(x) = htole16(v)) #define betoh32 be32toh #define letoh32 le32toh #define bemtoh32(x) htobe32(*(FAR uint32_t *)(x)) #define htobem32(x, v) (*(FAR uint32_t *)(x) = htobe32(v)) #define lemtoh32(x) letoh32(*(FAR uint32_t *)(x)) #define htolem32(x, v) (*(FAR uint32_t *)(x) = htole32(v)) #ifdef CONFIG_HAVE_LONG_LONG # define betoh64 be64toh # define letoh64 le64toh # define bemtoh64(x) htobe64(*(FAR uint64_t *)(x)) # define htobem64(x, v) (*(FAR uint64_t *)(x) = htobe64(v)) # define lemtoh64(x) letoh64(*(FAR uint64_t *)(x)) # define htolem64(x, v) (*(FAR uint64_t *)(x) = htole64(v)) #endif #endif /* __INCLUDE_SYS_ENDIAN_H */