Merge "Add cross-platform <android-base/endian.h>."
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commit
8a16081fa1
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@ -78,6 +78,7 @@ cc_test {
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host_supported: true,
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clang: true,
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srcs: [
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"endian_test.cpp",
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"errors_test.cpp",
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"file_test.cpp",
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"logging_test.cpp",
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@ -0,0 +1,69 @@
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/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "android-base/endian.h"
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#include <gtest/gtest.h>
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TEST(endian, constants) {
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ASSERT_TRUE(__LITTLE_ENDIAN == LITTLE_ENDIAN);
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ASSERT_TRUE(__BIG_ENDIAN == BIG_ENDIAN);
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ASSERT_TRUE(__BYTE_ORDER == BYTE_ORDER);
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ASSERT_EQ(__LITTLE_ENDIAN, __BYTE_ORDER);
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}
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TEST(endian, smoke) {
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static constexpr uint16_t le16 = 0x1234;
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static constexpr uint32_t le32 = 0x12345678;
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static constexpr uint64_t le64 = 0x123456789abcdef0;
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static constexpr uint16_t be16 = 0x3412;
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static constexpr uint32_t be32 = 0x78563412;
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static constexpr uint64_t be64 = 0xf0debc9a78563412;
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ASSERT_EQ(be16, htons(le16));
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ASSERT_EQ(be32, htonl(le32));
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ASSERT_EQ(be64, htonq(le64));
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ASSERT_EQ(le16, ntohs(be16));
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ASSERT_EQ(le32, ntohl(be32));
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ASSERT_EQ(le64, ntohq(be64));
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ASSERT_EQ(be16, htobe16(le16));
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ASSERT_EQ(be32, htobe32(le32));
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ASSERT_EQ(be64, htobe64(le64));
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ASSERT_EQ(le16, betoh16(be16));
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ASSERT_EQ(le32, betoh32(be32));
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ASSERT_EQ(le64, betoh64(be64));
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ASSERT_EQ(le16, htole16(le16));
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ASSERT_EQ(le32, htole32(le32));
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ASSERT_EQ(le64, htole64(le64));
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ASSERT_EQ(le16, letoh16(le16));
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ASSERT_EQ(le32, letoh32(le32));
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ASSERT_EQ(le64, letoh64(le64));
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ASSERT_EQ(le16, be16toh(be16));
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ASSERT_EQ(le32, be32toh(be32));
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ASSERT_EQ(le64, be64toh(be64));
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ASSERT_EQ(le16, le16toh(le16));
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ASSERT_EQ(le32, le32toh(le32));
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ASSERT_EQ(le64, le64toh(le64));
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}
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@ -0,0 +1,90 @@
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/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ANDROID_BASE_ENDIAN_H
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#define ANDROID_BASE_ENDIAN_H
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/* A cross-platform equivalent of bionic's <sys/endian.h>. */
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#if defined(__BIONIC__)
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#include <sys/endian.h>
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#elif defined(__GLIBC__)
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/* glibc's <endian.h> is like bionic's <sys/endian.h>. */
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#include <endian.h>
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/* glibc keeps htons and htonl in <netinet/in.h>. */
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#include <netinet/in.h>
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/* glibc doesn't have the 64-bit variants. */
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#define htonq(x) htobe64(x)
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#define ntohq(x) be64toh(x)
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/* glibc has different names to BSD for these. */
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#define betoh16(x) be16toh(x)
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#define betoh32(x) be32toh(x)
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#define betoh64(x) be64toh(x)
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#else
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/* Mac OS and Windows have nothing. */
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#define __LITTLE_ENDIAN 1234
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#define LITTLE_ENDIAN __LITTLE_ENDIAN
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#define __BIG_ENDIAN 4321
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#define BIG_ENDIAN __BIG_ENDIAN
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#define __BYTE_ORDER __LITTLE_ENDIAN
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#define BYTE_ORDER __BYTE_ORDER
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#define htons(x) __builtin_bswap16(x)
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#define htonl(x) __builtin_bswap32(x)
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#define htonq(x) __builtin_bswap64(x)
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#define ntohs(x) __builtin_bswap16(x)
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#define ntohl(x) __builtin_bswap32(x)
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#define ntohq(x) __builtin_bswap64(x)
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#define htobe16(x) __builtin_bswap16(x)
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#define htobe32(x) __builtin_bswap32(x)
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#define htobe64(x) __builtin_bswap64(x)
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#define betoh16(x) __builtin_bswap16(x)
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#define betoh32(x) __builtin_bswap32(x)
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#define betoh64(x) __builtin_bswap64(x)
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#define htole16(x) (x)
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#define htole32(x) (x)
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#define htole64(x) (x)
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#define letoh16(x) (x)
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#define letoh32(x) (x)
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#define letoh64(x) (x)
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#define be16toh(x) __builtin_bswap16(x)
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#define be32toh(x) __builtin_bswap32(x)
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#define be64toh(x) __builtin_bswap64(x)
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#define le16toh(x) (x)
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#define le32toh(x) (x)
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#define le64toh(x) (x)
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#endif
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#endif // ANDROID_BASE_ENDIAN_H
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