// Copyright 2018 Espressif Systems (Shanghai) PTE LTD // Copyright 2020 Francesco Giancane <francesco.giancane@accenture.com> // // Licensed 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. /* * This is a compatibility header for <endian.h>. * In xtensa-newlib distribution it is located in <machine/endian.h> * but most program expect to be plain <endian.h>. */ #ifndef XTENSA_COMPAT_ENDIAN_H_INCLUDED #define XTENSA_COMPAT_ENDIAN_H_INCLUDED #include <machine/endian.h> /* * All the code below is a rework of * https://github.com/freebsd/freebsd/blob/master/sys/sys/endian.h * to import symbols defining non-standard endian handling functions. * The aforementioned source code license terms are included here. * For further license info, please look at https://github.com/freebsd/freebsd */ /*- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD * * Copyright (c) 2002 Thomas Moestl <tmm@FreeBSD.org> * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $FreeBSD$ */ /* * General byte order swapping functions. */ #define bswap16(x) __bswap16(x) #define bswap32(x) __bswap32(x) #define bswap64(x) __bswap64(x) /* * Host to big endian, host to little endian, big endian to host, and little * endian to host byte order functions as detailed in byteorder(9). */ #if _BYTE_ORDER == _LITTLE_ENDIAN #define htobe16(x) bswap16((x)) #define htobe32(x) bswap32((x)) #define htobe64(x) bswap64((x)) #define htole16(x) ((uint16_t)(x)) #define htole32(x) ((uint32_t)(x)) #define htole64(x) ((uint64_t)(x)) #define be16toh(x) bswap16((x)) #define be32toh(x) bswap32((x)) #define be64toh(x) bswap64((x)) #define le16toh(x) ((uint16_t)(x)) #define le32toh(x) ((uint32_t)(x)) #define le64toh(x) ((uint64_t)(x)) #else /* _BYTE_ORDER != _LITTLE_ENDIAN */ #define htobe16(x) ((uint16_t)(x)) #define htobe32(x) ((uint32_t)(x)) #define htobe64(x) ((uint64_t)(x)) #define htole16(x) bswap16((x)) #define htole32(x) bswap32((x)) #define htole64(x) bswap64((x)) #define be16toh(x) ((uint16_t)(x)) #define be32toh(x) ((uint32_t)(x)) #define be64toh(x) ((uint64_t)(x)) #define le16toh(x) bswap16((x)) #define le32toh(x) bswap32((x)) #define le64toh(x) bswap64((x)) #endif /* _BYTE_ORDER == _LITTLE_ENDIAN */ /* Alignment-agnostic encode/decode bytestream to/from little/big endian. */ static __inline uint16_t be16dec(const void *pp) { uint8_t const *p = (uint8_t const *)pp; return ((p[0] << 8) | p[1]); } static __inline uint32_t be32dec(const void *pp) { uint8_t const *p = (uint8_t const *)pp; return (((unsigned)p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]); } static __inline uint64_t be64dec(const void *pp) { uint8_t const *p = (uint8_t const *)pp; return (((uint64_t)be32dec(p) << 32) | be32dec(p + 4)); } static __inline uint16_t le16dec(const void *pp) { uint8_t const *p = (uint8_t const *)pp; return ((p[1] << 8) | p[0]); } static __inline uint32_t le32dec(const void *pp) { uint8_t const *p = (uint8_t const *)pp; return (((unsigned)p[3] << 24) | (p[2] << 16) | (p[1] << 8) | p[0]); } static __inline uint64_t le64dec(const void *pp) { uint8_t const *p = (uint8_t const *)pp; return (((uint64_t)le32dec(p + 4) << 32) | le32dec(p)); } static __inline void be16enc(void *pp, uint16_t u) { uint8_t *p = (uint8_t *)pp; p[0] = (u >> 8) & 0xff; p[1] = u & 0xff; } static __inline void be32enc(void *pp, uint32_t u) { uint8_t *p = (uint8_t *)pp; p[0] = (u >> 24) & 0xff; p[1] = (u >> 16) & 0xff; p[2] = (u >> 8) & 0xff; p[3] = u & 0xff; } static __inline void be64enc(void *pp, uint64_t u) { uint8_t *p = (uint8_t *)pp; be32enc(p, (uint32_t)(u >> 32)); be32enc(p + 4, (uint32_t)(u & 0xffffffffU)); } static __inline void le16enc(void *pp, uint16_t u) { uint8_t *p = (uint8_t *)pp; p[0] = u & 0xff; p[1] = (u >> 8) & 0xff; } static __inline void le32enc(void *pp, uint32_t u) { uint8_t *p = (uint8_t *)pp; p[0] = u & 0xff; p[1] = (u >> 8) & 0xff; p[2] = (u >> 16) & 0xff; p[3] = (u >> 24) & 0xff; } static __inline void le64enc(void *pp, uint64_t u) { uint8_t *p = (uint8_t *)pp; le32enc(p, (uint32_t)(u & 0xffffffffU)); le32enc(p + 4, (uint32_t)(u >> 32)); } #endif /* XTENSA_COMPAT_ENDIAN_H_INCLUDED */