1 /* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ANDROID_BASE_ENDIAN_H 18 #define ANDROID_BASE_ENDIAN_H 19 20 /* A cross-platform equivalent of bionic's <sys/endian.h>. */ 21 22 #if defined(__BIONIC__) 23 24 #include <sys/endian.h> 25 26 #elif defined(__GLIBC__) 27 28 /* glibc's <endian.h> is like bionic's <sys/endian.h>. */ 29 #include <endian.h> 30 31 /* glibc keeps htons and htonl in <netinet/in.h>. */ 32 #include <netinet/in.h> 33 34 /* glibc doesn't have the 64-bit variants. */ 35 #define htonq(x) htobe64(x) 36 #define ntohq(x) be64toh(x) 37 38 /* glibc has different names to BSD for these. */ 39 #define betoh16(x) be16toh(x) 40 #define betoh32(x) be32toh(x) 41 #define betoh64(x) be64toh(x) 42 43 #else 44 45 /* Mac OS and Windows have nothing. */ 46 47 #define __LITTLE_ENDIAN 1234 48 #define LITTLE_ENDIAN __LITTLE_ENDIAN 49 50 #define __BIG_ENDIAN 4321 51 #define BIG_ENDIAN __BIG_ENDIAN 52 53 #define __BYTE_ORDER __LITTLE_ENDIAN 54 #define BYTE_ORDER __BYTE_ORDER 55 56 #define htons(x) __builtin_bswap16(x) 57 #define htonl(x) __builtin_bswap32(x) 58 #define htonq(x) __builtin_bswap64(x) 59 60 #define ntohs(x) __builtin_bswap16(x) 61 #define ntohl(x) __builtin_bswap32(x) 62 #define ntohq(x) __builtin_bswap64(x) 63 64 #define htobe16(x) __builtin_bswap16(x) 65 #define htobe32(x) __builtin_bswap32(x) 66 #define htobe64(x) __builtin_bswap64(x) 67 68 #define betoh16(x) __builtin_bswap16(x) 69 #define betoh32(x) __builtin_bswap32(x) 70 #define betoh64(x) __builtin_bswap64(x) 71 72 #define htole16(x) (x) 73 #define htole32(x) (x) 74 #define htole64(x) (x) 75 76 #define letoh16(x) (x) 77 #define letoh32(x) (x) 78 #define letoh64(x) (x) 79 80 #define be16toh(x) __builtin_bswap16(x) 81 #define be32toh(x) __builtin_bswap32(x) 82 #define be64toh(x) __builtin_bswap64(x) 83 84 #define le16toh(x) (x) 85 #define le32toh(x) (x) 86 #define le64toh(x) (x) 87 88 #endif 89 90 #endif // ANDROID_BASE_ENDIAN_H 91