Merge "Add cross-platform <android-base/endian.h>."

This commit is contained in:
Elliott Hughes 2017-02-25 02:07:04 +00:00 committed by Gerrit Code Review
commit 8a16081fa1
3 changed files with 160 additions and 0 deletions

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@ -78,6 +78,7 @@ cc_test {
host_supported: true,
clang: true,
srcs: [
"endian_test.cpp",
"errors_test.cpp",
"file_test.cpp",
"logging_test.cpp",

69
base/endian_test.cpp Normal file
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@ -0,0 +1,69 @@
/*
* Copyright (C) 2017 The Android Open Source Project
*
* 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.
*/
#include "android-base/endian.h"
#include <gtest/gtest.h>
TEST(endian, constants) {
ASSERT_TRUE(__LITTLE_ENDIAN == LITTLE_ENDIAN);
ASSERT_TRUE(__BIG_ENDIAN == BIG_ENDIAN);
ASSERT_TRUE(__BYTE_ORDER == BYTE_ORDER);
ASSERT_EQ(__LITTLE_ENDIAN, __BYTE_ORDER);
}
TEST(endian, smoke) {
static constexpr uint16_t le16 = 0x1234;
static constexpr uint32_t le32 = 0x12345678;
static constexpr uint64_t le64 = 0x123456789abcdef0;
static constexpr uint16_t be16 = 0x3412;
static constexpr uint32_t be32 = 0x78563412;
static constexpr uint64_t be64 = 0xf0debc9a78563412;
ASSERT_EQ(be16, htons(le16));
ASSERT_EQ(be32, htonl(le32));
ASSERT_EQ(be64, htonq(le64));
ASSERT_EQ(le16, ntohs(be16));
ASSERT_EQ(le32, ntohl(be32));
ASSERT_EQ(le64, ntohq(be64));
ASSERT_EQ(be16, htobe16(le16));
ASSERT_EQ(be32, htobe32(le32));
ASSERT_EQ(be64, htobe64(le64));
ASSERT_EQ(le16, betoh16(be16));
ASSERT_EQ(le32, betoh32(be32));
ASSERT_EQ(le64, betoh64(be64));
ASSERT_EQ(le16, htole16(le16));
ASSERT_EQ(le32, htole32(le32));
ASSERT_EQ(le64, htole64(le64));
ASSERT_EQ(le16, letoh16(le16));
ASSERT_EQ(le32, letoh32(le32));
ASSERT_EQ(le64, letoh64(le64));
ASSERT_EQ(le16, be16toh(be16));
ASSERT_EQ(le32, be32toh(be32));
ASSERT_EQ(le64, be64toh(be64));
ASSERT_EQ(le16, le16toh(le16));
ASSERT_EQ(le32, le32toh(le32));
ASSERT_EQ(le64, le64toh(le64));
}

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/*
* Copyright (C) 2017 The Android Open Source Project
*
* 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.
*/
#ifndef ANDROID_BASE_ENDIAN_H
#define ANDROID_BASE_ENDIAN_H
/* A cross-platform equivalent of bionic's <sys/endian.h>. */
#if defined(__BIONIC__)
#include <sys/endian.h>
#elif defined(__GLIBC__)
/* glibc's <endian.h> is like bionic's <sys/endian.h>. */
#include <endian.h>
/* glibc keeps htons and htonl in <netinet/in.h>. */
#include <netinet/in.h>
/* glibc doesn't have the 64-bit variants. */
#define htonq(x) htobe64(x)
#define ntohq(x) be64toh(x)
/* glibc has different names to BSD for these. */
#define betoh16(x) be16toh(x)
#define betoh32(x) be32toh(x)
#define betoh64(x) be64toh(x)
#else
/* Mac OS and Windows have nothing. */
#define __LITTLE_ENDIAN 1234
#define LITTLE_ENDIAN __LITTLE_ENDIAN
#define __BIG_ENDIAN 4321
#define BIG_ENDIAN __BIG_ENDIAN
#define __BYTE_ORDER __LITTLE_ENDIAN
#define BYTE_ORDER __BYTE_ORDER
#define htons(x) __builtin_bswap16(x)
#define htonl(x) __builtin_bswap32(x)
#define htonq(x) __builtin_bswap64(x)
#define ntohs(x) __builtin_bswap16(x)
#define ntohl(x) __builtin_bswap32(x)
#define ntohq(x) __builtin_bswap64(x)
#define htobe16(x) __builtin_bswap16(x)
#define htobe32(x) __builtin_bswap32(x)
#define htobe64(x) __builtin_bswap64(x)
#define betoh16(x) __builtin_bswap16(x)
#define betoh32(x) __builtin_bswap32(x)
#define betoh64(x) __builtin_bswap64(x)
#define htole16(x) (x)
#define htole32(x) (x)
#define htole64(x) (x)
#define letoh16(x) (x)
#define letoh32(x) (x)
#define letoh64(x) (x)
#define be16toh(x) __builtin_bswap16(x)
#define be32toh(x) __builtin_bswap32(x)
#define be64toh(x) __builtin_bswap64(x)
#define le16toh(x) (x)
#define le32toh(x) (x)
#define le64toh(x) (x)
#endif
#endif // ANDROID_BASE_ENDIAN_H